Diff of /trunk/src/osm-gps-map-osd-classic.c

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revision 73 by harbaum, Sun Aug 23 19:38:15 2009 UTC revision 152 by harbaum, Mon Nov 2 10:53:01 2009 UTC
# Line 19  Line 19 
19    
20  #include "config.h"  #include "config.h"
21  #include <stdlib.h>  // abs  #include <stdlib.h>  // abs
22  #include <math.h>    // M_PI  #include <string.h>
23    #include <math.h>    // M_PI/cos()
24    
25  /* parameters that can be overwritten from the config file: */  /* parameters that can be overwritten from the config file: */
26  /* OSM_GPS_MAP_OSD_DIAMETER */  /* OSD_DIAMETER */
27    /* OSD_X, OSD_Y */
28    
29  #ifndef USE_CAIRO  #ifndef USE_CAIRO
30  #error "OSD control display lacks a non-cairo implementation!"  #error "OSD control display lacks a non-cairo implementation!"
# Line 31  Line 33 
33  #include <cairo.h>  #include <cairo.h>
34    
35  #include "osm-gps-map.h"  #include "osm-gps-map.h"
36    #include "converter.h"
37  #include "osm-gps-map-osd-classic.h"  #include "osm-gps-map-osd-classic.h"
38    
39  //the osd controls  //the osd controls
40  typedef struct {  typedef struct {
41      GdkPixmap *backup;      /* the offscreen representation of the OSD */
42      gint backup_x, backup_y;      struct {
43      cairo_surface_t *overlay;          cairo_surface_t *surface;
44            gboolean rendered;
45    #ifdef OSD_GPS_BUTTON
46            gboolean gps_enabled;
47    #endif
48        } controls;
49    
50    #ifdef OSD_BALLOON
51        //a balloon with additional info
52        struct {
53            cairo_surface_t *surface;
54            int orientation, offset_x, offset_y;
55    
56            gboolean just_created;
57            float lat, lon;
58            OsmGpsMapRect_t rect;
59    
60            /* function called to have the user app draw the contents */
61            OsmGpsMapBalloonCallback cb;
62            gpointer data;
63        } balloon;
64    #endif
65    
66    #ifdef OSD_SCALE
67        struct {
68            cairo_surface_t *surface;
69            int zoom;
70        } scale;
71    #endif
72    
73    #ifdef OSD_CROSSHAIR
74        struct {
75            cairo_surface_t *surface;
76            gboolean rendered;
77        } crosshair;
78    #endif
79    
80    #ifdef OSD_NAV
81        struct {
82            cairo_surface_t *surface;
83            float lat, lon;
84            char *name;
85            gboolean imperial;    // display distance imperial/metric
86        } nav;
87    #endif
88    
89    #ifdef OSD_COORDINATES
90        struct {
91            cairo_surface_t *surface;
92            float lat, lon;
93        } coordinates;
94    #endif
95    
96    #ifdef OSD_SOURCE_SEL
97        struct {
98            /* values to handle the "source" menu */
99            cairo_surface_t *surface;
100            gboolean expanded;
101            gint shift, dir, count;
102            gint handler_id;
103            gint width, height;
104            gboolean rendered;
105        } source_sel;
106    #endif
107    
108  } osd_priv_t;  } osd_priv_t;
109    
110    #ifdef OSD_BALLOON
111    /* most visual effects are hardcoded by now, but may be made */
112    /* available via properties later */
113    #ifndef BALLOON_AREA_WIDTH
114    #define BALLOON_AREA_WIDTH           290
115    #endif
116    #ifndef BALLOON_AREA_HEIGHT
117    #define BALLOON_AREA_HEIGHT           75
118    #endif
119    #ifndef BALLOON_CORNER_RADIUS
120    #define BALLOON_CORNER_RADIUS         10
121    #endif
122    
123    #define BALLOON_BORDER               (BALLOON_CORNER_RADIUS/2)
124    #define BALLOON_WIDTH                (BALLOON_AREA_WIDTH + 2 * BALLOON_BORDER)
125    #define BALLOON_HEIGHT               (BALLOON_AREA_HEIGHT + 2 * BALLOON_BORDER)
126    #define BALLOON_TRANSPARENCY         0.8
127    #define POINTER_HEIGHT                20
128    #define POINTER_FOOT_WIDTH            20
129    #define POINTER_OFFSET               (BALLOON_CORNER_RADIUS*3/4)
130    #define BALLOON_SHADOW               (BALLOON_CORNER_RADIUS/2)
131    #define BALLOON_SHADOW_TRANSPARENCY  0.2
132    
133    #define BALLOON_W  (BALLOON_WIDTH + BALLOON_SHADOW)
134    #define BALLOON_H  (BALLOON_HEIGHT + POINTER_HEIGHT + BALLOON_SHADOW)
135    
136    #define CLOSE_BUTTON_RADIUS   (BALLOON_CORNER_RADIUS)
137    
138    #if 0
139    #define FIN   printf("entering function %s\n", __func__);
140    #define FOUT  printf("leaving function %s\n", __func__);
141    #else
142    #define FIN   ;
143    #define FOUT  ;
144    #endif
145    
146    /* draw the bubble shape. this is used twice, once for the shape and once */
147    /* for the shadow */
148    static void
149    osm_gps_map_draw_balloon_shape (cairo_t *cr, int x0, int y0, int x1, int y1,
150           gboolean bottom, int px, int py, int px0, int px1) {
151    
152        FIN;
153    
154        cairo_move_to (cr, x0, y0 + BALLOON_CORNER_RADIUS);
155        cairo_arc (cr, x0 + BALLOON_CORNER_RADIUS, y0 + BALLOON_CORNER_RADIUS,
156                   BALLOON_CORNER_RADIUS, -M_PI, -M_PI/2);
157        if(!bottom) {
158            /* insert top pointer */
159            cairo_line_to (cr, px1, y0);
160            cairo_line_to (cr, px, py);
161            cairo_line_to (cr, px0, y0);
162        }
163    
164        cairo_line_to (cr, x1 - BALLOON_CORNER_RADIUS, y0);
165        cairo_arc (cr, x1 - BALLOON_CORNER_RADIUS, y0 + BALLOON_CORNER_RADIUS,
166                   BALLOON_CORNER_RADIUS, -M_PI/2, 0);
167        cairo_line_to (cr, x1 , y1 - BALLOON_CORNER_RADIUS);
168        cairo_arc (cr, x1 - BALLOON_CORNER_RADIUS, y1 - BALLOON_CORNER_RADIUS,
169                   BALLOON_CORNER_RADIUS, 0, M_PI/2);
170        if(bottom) {
171            /* insert bottom pointer */
172            cairo_line_to (cr, px0, y1);
173            cairo_line_to (cr, px, py);
174            cairo_line_to (cr, px1, y1);
175        }
176    
177        cairo_line_to (cr, x0 + BALLOON_CORNER_RADIUS, y1);
178        cairo_arc (cr, x0 + BALLOON_CORNER_RADIUS, y1 - BALLOON_CORNER_RADIUS,
179                   BALLOON_CORNER_RADIUS, M_PI/2, M_PI);
180    
181        cairo_close_path (cr);
182    
183        FOUT;
184    }
185    
186    static void
187    osd_render_balloon(osm_gps_map_osd_t *osd) {
188        FIN;
189    
190        osd_priv_t *priv = (osd_priv_t*)osd->priv;
191    
192        if(!priv->balloon.surface)
193            return;
194    
195        /* get zoom */
196        gint zoom;
197        g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);
198    
199        /* ------- convert given coordinate into screen position --------- */
200        gint xs, ys;
201        osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget),
202                                          priv->balloon.lat, priv->balloon.lon,
203                                          &xs, &ys);
204    
205        gint x0 = 1, y0 = 1;
206    
207        /* check position of this relative to screen center to determine */
208        /* pointer direction ... */
209        int pointer_x, pointer_x0, pointer_x1;
210        int pointer_y;
211    
212        /* ... and calculate position */
213        int orientation = 0;
214        if(xs > osd->widget->allocation.width/2) {
215            priv->balloon.offset_x = -BALLOON_WIDTH + POINTER_OFFSET;
216            pointer_x = x0 - priv->balloon.offset_x;
217            pointer_x0 = pointer_x - (BALLOON_CORNER_RADIUS - POINTER_OFFSET);
218            pointer_x1 = pointer_x0 - POINTER_FOOT_WIDTH;
219            orientation |= 1;
220        } else {
221            priv->balloon.offset_x = -POINTER_OFFSET;
222            pointer_x = x0 - priv->balloon.offset_x;
223            pointer_x1 = pointer_x + (BALLOON_CORNER_RADIUS - POINTER_OFFSET);
224            pointer_x0 = pointer_x1 + POINTER_FOOT_WIDTH;
225        }
226    
227        gboolean bottom = FALSE;
228        if(ys > osd->widget->allocation.height/2) {
229            priv->balloon.offset_y = -BALLOON_HEIGHT - POINTER_HEIGHT;
230            pointer_y = y0 - priv->balloon.offset_y;
231            bottom = TRUE;
232            orientation |= 2;
233        } else {
234            priv->balloon.offset_y = 0;
235            pointer_y = y0 - priv->balloon.offset_y;
236            y0 += POINTER_HEIGHT;
237        }
238    
239        /* if required orientation equals current one, then don't render */
240        /* anything */
241        if(orientation == priv->balloon.orientation)
242            return;
243    
244        priv->balloon.orientation = orientation;
245    
246        /* calculate bottom/right of box */
247        int x1 = x0 + BALLOON_WIDTH, y1 = y0 + BALLOON_HEIGHT;
248    
249        /* save balloon screen coordinates for later use */
250        priv->balloon.rect.x = x0 + BALLOON_BORDER;
251        priv->balloon.rect.y = y0 + BALLOON_BORDER;
252        priv->balloon.rect.w = x1 - x0 - 2*BALLOON_BORDER;
253        priv->balloon.rect.h = y1 - y0 - 2*BALLOON_BORDER;
254    
255        g_assert(priv->balloon.surface);
256        cairo_t *cr = cairo_create(priv->balloon.surface);
257        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
258        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
259        cairo_paint(cr);
260        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
261    
262        /* --------- draw shadow --------------- */
263        osm_gps_map_draw_balloon_shape (cr,
264                     x0 + BALLOON_SHADOW, y0 + BALLOON_SHADOW,
265                     x1 + BALLOON_SHADOW, y1 + BALLOON_SHADOW,
266                     bottom, pointer_x, pointer_y,
267                     pointer_x0 + BALLOON_SHADOW, pointer_x1 + BALLOON_SHADOW);
268    
269        cairo_set_source_rgba (cr, 0, 0, 0, BALLOON_SHADOW_TRANSPARENCY);
270        cairo_fill_preserve (cr);
271        cairo_set_source_rgba (cr, 1, 0, 0, 1.0);
272        cairo_set_line_width (cr, 0);
273        cairo_stroke (cr);
274    
275        /* --------- draw main shape ----------- */
276        osm_gps_map_draw_balloon_shape (cr, x0, y0, x1, y1,
277                     bottom, pointer_x, pointer_y, pointer_x0, pointer_x1);
278    
279        cairo_set_source_rgba (cr, 1, 1, 1, BALLOON_TRANSPARENCY);
280        cairo_fill_preserve (cr);
281        cairo_set_source_rgba (cr, 0, 0, 0, BALLOON_TRANSPARENCY);
282        cairo_set_line_width (cr, 1);
283        cairo_stroke (cr);
284    
285        if (priv->balloon.cb) {
286            osm_gps_map_balloon_event_t event;
287    
288            /* clip in case application tries to draw in */
289                /* exceed of the balloon */
290            cairo_rectangle (cr, priv->balloon.rect.x, priv->balloon.rect.y,
291                             priv->balloon.rect.w, priv->balloon.rect.h);
292            cairo_clip (cr);
293            cairo_new_path (cr);  /* current path is not consumed by cairo_clip */
294    
295            /* request the application to draw the balloon contents */
296            event.type = OSM_GPS_MAP_BALLOON_EVENT_TYPE_DRAW;
297            event.data.draw.rect = &priv->balloon.rect;
298            event.data.draw.cr = cr;
299    
300            priv->balloon.cb(&event, priv->balloon.data);
301        }
302    
303        cairo_destroy(cr);
304    
305        FOUT;
306    }
307    
308    /* return true if balloon is being displayed and if */
309    /* the given coordinate is within this balloon */
310    static gboolean
311    osd_balloon_check(osm_gps_map_osd_t *osd, gboolean click, gboolean down, gint x, gint y)
312    {
313        FIN;
314    
315        osd_priv_t *priv = (osd_priv_t*)osd->priv;
316    
317        if(!priv->balloon.surface)
318            return FALSE;
319    
320        gint xs, ys;
321        osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget),
322                                          priv->balloon.lat, priv->balloon.lon,
323                                          &xs, &ys);
324    
325        xs += priv->balloon.rect.x + priv->balloon.offset_x;
326        ys += priv->balloon.rect.y + priv->balloon.offset_y;
327    
328        gboolean is_in =
329            (x > xs) && (x < xs + priv->balloon.rect.w) &&
330            (y > ys) && (y < ys + priv->balloon.rect.h);
331    
332        /* is this a real click or is the application just checking for something? */
333        if(click) {
334    
335            /* handle the fact that the balloon may have been created by the */
336            /* button down event */
337            if(!is_in && !down && !priv->balloon.just_created) {
338                /* the user actually clicked outside the balloon */
339    
340                /* close the balloon! */
341                osm_gps_map_osd_clear_balloon (OSM_GPS_MAP(osd->widget));
342    
343                /* and inform application about this */
344                if(priv->balloon.cb) {
345                    osm_gps_map_balloon_event_t event;
346                    event.type = OSM_GPS_MAP_BALLOON_EVENT_TYPE_REMOVED;
347                    priv->balloon.cb(&event, priv->balloon.data);
348                }
349    
350            }
351    
352            if(is_in && priv->balloon.cb) {
353                osm_gps_map_balloon_event_t event;
354    
355                /* notify application of click */
356                event.type = OSM_GPS_MAP_BALLOON_EVENT_TYPE_CLICK;
357                event.data.click.x = x - xs;
358                event.data.click.y = y - ys;
359                event.data.click.down = down;
360    
361                priv->balloon.cb(&event, priv->balloon.data);
362            }
363        }
364        FOUT;
365        return is_in;
366    }
367    
368    void osm_gps_map_osd_clear_balloon (OsmGpsMap *map) {
369        FIN;
370    
371        g_return_if_fail (OSM_IS_GPS_MAP (map));
372    
373        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
374        g_return_if_fail (osd);
375    
376        osd_priv_t *priv = (osd_priv_t*)osd->priv;
377        g_return_if_fail (priv);
378    
379        if(priv->balloon.surface) {
380            cairo_surface_destroy(priv->balloon.surface);
381            priv->balloon.surface = NULL;
382            priv->balloon.lat = OSM_GPS_MAP_INVALID;
383            priv->balloon.lon = OSM_GPS_MAP_INVALID;
384        }
385        osm_gps_map_redraw(map);
386        FOUT;
387    }
388    
389    void
390    osm_gps_map_osd_draw_balloon (OsmGpsMap *map, float latitude, float longitude,
391                                  OsmGpsMapBalloonCallback cb, gpointer data) {
392        FIN;
393        g_return_if_fail (OSM_IS_GPS_MAP (map));
394    
395        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
396        g_return_if_fail (osd);
397    
398        osd_priv_t *priv = (osd_priv_t*)osd->priv;
399        g_return_if_fail (priv);
400    
401        osm_gps_map_osd_clear_balloon (map);
402    
403        /* allocate balloon surface */
404        priv->balloon.surface =
405            cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
406                                       BALLOON_W+2, BALLOON_H+2);
407    
408        priv->balloon.lat = latitude;
409        priv->balloon.lon = longitude;
410        priv->balloon.cb = cb;
411        priv->balloon.data = data;
412        priv->balloon.just_created = TRUE;
413    
414        priv->balloon.orientation = -1;
415    
416        osd_render_balloon(osd);
417    
418        osm_gps_map_redraw(map);
419        FOUT;
420    }
421    
422    #endif // OSD_BALLOON
423    
424  /* position and extent of bounding box */  /* position and extent of bounding box */
425    #ifndef OSD_X
426  #define OSD_X      (10)  #define OSD_X      (10)
427  #define OSD_Y      (10)  #endif
428    
429  #define OSD_COLOR            0.5, 0.5, 1  #ifndef OSD_Y
430  #define OSD_COLOR_DISABLED   0.8, 0.8, 0.8  #define OSD_Y      (10)
431    #endif
432    
433  /* parameters of the direction shape */  /* parameters of the direction shape */
434  #ifndef OSM_GPS_MAP_OSD_DIAMETER  #ifndef OSD_DIAMETER
435  #define D_RAD  (30)         // diameter of dpad  #define D_RAD  (30)         // diameter of dpad
436  #else  #else
437  #define D_RAD  (OSM_GPS_MAP_OSD_DIAMETER)  #define D_RAD  (OSD_DIAMETER)
438  #endif  #endif
439  #define D_TIP  (4*D_RAD/5)  // distance of arrow tip from dpad center  #define D_TIP  (4*D_RAD/5)  // distance of arrow tip from dpad center
440  #define D_LEN  (D_RAD/4)    // length of arrow  #define D_LEN  (D_RAD/4)    // length of arrow
# Line 61  typedef struct { Line 444  typedef struct {
444  #define Z_STEP   (D_RAD/4)  // distance between dpad and zoom  #define Z_STEP   (D_RAD/4)  // distance between dpad and zoom
445  #define Z_RAD    (D_RAD/2)  // radius of "caps" of zoom bar  #define Z_RAD    (D_RAD/2)  // radius of "caps" of zoom bar
446    
447    #ifdef OSD_SHADOW_ENABLE
448  /* shadow also depends on control size */  /* shadow also depends on control size */
449  #define OSD_SHADOW (D_RAD/6)  #define OSD_SHADOW (D_RAD/6)
450    #else
451    #define OSD_SHADOW (0)
452    #endif
453    
454    /* normally the GPS button is in the center of the dpad. if there's */
455    /* no dpad it will go into the zoom area */
456    #if defined(OSD_GPS_BUTTON) && defined(OSD_NO_DPAD)
457    #define Z_GPS  1
458    #else
459    #define Z_GPS  0
460    #endif
461    
462  /* total width and height of controls incl. shadow */  /* total width and height of controls incl. shadow */
463  #define OSD_W    (2*D_RAD + OSD_SHADOW)  #define OSD_W    (2*D_RAD + OSD_SHADOW + Z_GPS * 2 * Z_RAD)
464    #if !Z_GPS
465  #define OSD_H    (2*D_RAD + Z_STEP + 2*Z_RAD + OSD_SHADOW)  #define OSD_H    (2*D_RAD + Z_STEP + 2*Z_RAD + OSD_SHADOW)
466    #else
467    #define OSD_H    (2*Z_RAD + OSD_SHADOW)
468    #endif
469    
470    #ifdef OSD_SHADOW_ENABLE
471  #define OSD_LBL_SHADOW (OSD_SHADOW/2)  #define OSD_LBL_SHADOW (OSD_SHADOW/2)
472    #endif
473    
474    #define Z_TOP    ((1-Z_GPS) * (2 * D_RAD + Z_STEP))
475    
 #define Z_TOP    (2 * D_RAD + Z_STEP)  
476  #define Z_MID    (Z_TOP + Z_RAD)  #define Z_MID    (Z_TOP + Z_RAD)
477  #define Z_BOT    (Z_MID + Z_RAD)  #define Z_BOT    (Z_MID + Z_RAD)
478  #define Z_LEFT   (Z_RAD)  #define Z_LEFT   (Z_RAD)
479  #define Z_RIGHT  (2 * D_RAD - Z_RAD)  #define Z_RIGHT  (2 * D_RAD - Z_RAD + Z_GPS * 2 * Z_RAD)
480    #define Z_CENTER ((Z_RIGHT + Z_LEFT)/2)
481    
482  /* create the cairo shape used for the zoom buttons */  /* create the cairo shape used for the zoom buttons */
483  static void  static void
484  osm_gps_map_osd_zoom_shape(cairo_t *cr, gint x, gint y)  osd_zoom_shape(cairo_t *cr, gint x, gint y)
485  {  {
486      cairo_move_to (cr, x+Z_LEFT,    y+Z_TOP);      cairo_move_to (cr, x+Z_LEFT,    y+Z_TOP);
487      cairo_line_to (cr, x+Z_RIGHT,   y+Z_TOP);      cairo_line_to (cr, x+Z_RIGHT,   y+Z_TOP);
# Line 88  osm_gps_map_osd_zoom_shape(cairo_t *cr, Line 490  osm_gps_map_osd_zoom_shape(cairo_t *cr,
490      cairo_arc     (cr, x+Z_LEFT,    y+Z_MID, Z_RAD,  M_PI/2, -M_PI/2);      cairo_arc     (cr, x+Z_LEFT,    y+Z_MID, Z_RAD,  M_PI/2, -M_PI/2);
491  }  }
492    
493    /* ------------------- color/shadow functions ----------------- */
494    
495    #ifndef OSD_COLOR
496    /* if no color has been specified we just use the gdks default colors */
497    static void
498    osd_labels(cairo_t *cr, gint width, gboolean enabled,
499                           GdkColor *fg, GdkColor *disabled) {
500        if(enabled)  gdk_cairo_set_source_color(cr, fg);
501        else         gdk_cairo_set_source_color(cr, disabled);
502        cairo_set_line_width (cr, width);
503    }
504    #else
505    static void
506    osd_labels(cairo_t *cr, gint width, gboolean enabled) {
507        if(enabled)  cairo_set_source_rgb (cr, OSD_COLOR);
508        else         cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);
509        cairo_set_line_width (cr, width);
510    }
511    #endif
512    
513    #ifdef OSD_SHADOW_ENABLE
514    static void
515    osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {
516        cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);
517        cairo_set_line_width (cr, width);
518    }
519    #endif
520    
521    #ifndef OSD_NO_DPAD
522  /* create the cairo shape used for the dpad */  /* create the cairo shape used for the dpad */
523  static void  static void
524  osm_gps_map_osd_dpad_shape(cairo_t *cr, gint x, gint y)  osd_dpad_shape(cairo_t *cr, gint x, gint y)
525  {  {
526      cairo_arc (cr, x+D_RAD, y+D_RAD, D_RAD, 0, 2 * M_PI);      cairo_arc (cr, x+D_RAD, y+D_RAD, D_RAD, 0, 2 * M_PI);
527  }  }
528    #endif
529    
530    #ifdef OSD_SHADOW_ENABLE
531    static void
532    osd_shape_shadow(cairo_t *cr) {
533        cairo_set_source_rgba (cr, 0, 0, 0, 0.2);
534        cairo_fill (cr);
535        cairo_stroke (cr);
536    }
537    #endif
538    
539    #ifndef OSD_COLOR
540    /* if no color has been specified we just use the gdks default colors */
541    static void
542    osd_shape(cairo_t *cr, GdkColor *bg, GdkColor *fg) {
543        gdk_cairo_set_source_color(cr, bg);
544        cairo_fill_preserve (cr);
545        gdk_cairo_set_source_color(cr, fg);
546        cairo_set_line_width (cr, 1);
547        cairo_stroke (cr);
548    }
549    #else
550    static void
551    osd_shape(cairo_t *cr) {
552        cairo_set_source_rgb (cr, OSD_COLOR_BG);
553        cairo_fill_preserve (cr);
554        cairo_set_source_rgb (cr, OSD_COLOR);
555        cairo_set_line_width (cr, 1);
556        cairo_stroke (cr);
557    }
558    #endif
559    
560    
561  static gboolean  static gboolean
562  osm_gps_map_in_circle(gint x, gint y, gint cx, gint cy, gint rad)  osm_gps_map_in_circle(gint x, gint y, gint cx, gint cy, gint rad)
563  {  {
564        FIN;
565      return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);      return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);
566  }  }
567    
568    #ifndef OSD_NO_DPAD
569  /* check whether x/y is within the dpad */  /* check whether x/y is within the dpad */
570  static osd_button_t  static osd_button_t
571  osm_gps_map_osd_check_dpad(gint x, gint y)  osd_check_dpad(gint x, gint y)
572  {  {
573      /* within entire dpad circle */      /* within entire dpad circle */
574      if( osm_gps_map_in_circle(x, y, OSD_X + D_RAD, OSD_Y + D_RAD, D_RAD))      if( osm_gps_map_in_circle(x, y, D_RAD, D_RAD, D_RAD))
575      {      {
576          /* convert into position relative to dpads centre */          /* convert into position relative to dpads centre */
577          x -= (OSD_X + D_RAD);          x -= D_RAD;
578          y -= (OSD_Y + D_RAD);          y -= D_RAD;
579    
580    #ifdef OSD_GPS_BUTTON
581          /* check for dpad center goes here! */          /* check for dpad center goes here! */
582          if( osm_gps_map_in_circle(x, y, 0, 0, D_RAD/3))          if( osm_gps_map_in_circle(x, y, 0, 0, D_RAD/3))
583              return OSD_GPS;              return OSD_GPS;
584    #endif
585    
586          if( y < 0 && abs(x) < abs(y))          if( y < 0 && abs(x) < abs(y))
587              return OSD_UP;              return OSD_UP;
# Line 132  osm_gps_map_osd_check_dpad(gint x, gint Line 599  osm_gps_map_osd_check_dpad(gint x, gint
599      }      }
600      return OSD_NONE;      return OSD_NONE;
601  }  }
602    #endif
603    
604  /* check whether x/y is within the zoom pads */  /* check whether x/y is within the zoom pads */
605  static osd_button_t  static osd_button_t
606  osm_gps_map_osd_check_zoom(gint x, gint y) {  osd_check_zoom(gint x, gint y) {
607      if( x > OSD_X && x < (OSD_X + OSD_W) && y > Z_TOP && y < (OSD_Y+Z_BOT)) {      if( x > 0 && x < OSD_W && y > Z_TOP && y < Z_BOT) {
608    
609          /* within circle around (-) label */          /* within circle around (-) label */
610          if( osm_gps_map_in_circle(x, y, OSD_X + Z_LEFT, OSD_Y + Z_MID, Z_RAD))          if( osm_gps_map_in_circle(x, y, Z_LEFT, Z_MID, Z_RAD))
             return OSD_OUT;  
   
         /* between center of (-) button and center of entire zoom control area */  
         if(x > OSD_LEFT && x < OSD_X + D_RAD)  
611              return OSD_OUT;              return OSD_OUT;
612    
613          /* within circle around (+) label */          /* within circle around (+) label */
614          if( osm_gps_map_in_circle(x, y, OSD_X + Z_RIGHT, OSD_Y + Z_MID, Z_RAD))          if( osm_gps_map_in_circle(x, y, Z_RIGHT, Z_MID, Z_RAD))
615              return OSD_IN;              return OSD_IN;
616    
617    #if Z_GPS == 1
618            /* within square around center */
619            if( x > Z_CENTER - Z_RAD && x < Z_CENTER + Z_RAD)
620                return OSD_GPS;
621    #endif
622    
623            /* between center of (-) button and center of entire zoom control area */
624            if(x > OSD_LEFT && x < D_RAD)
625                return OSD_OUT;
626    
627          /* between center of (+) button and center of entire zoom control area */          /* between center of (+) button and center of entire zoom control area */
628          if(x < OSD_RIGHT && x > OSD_X + D_RAD)          if(x < OSD_RIGHT && x > D_RAD)
629              return OSD_IN;              return OSD_IN;
630      }      }
631    
632      return OSD_NONE;      return OSD_NONE;
633  }  }
634    
635  static osd_button_t  #ifdef OSD_SOURCE_SEL
 osm_gps_map_osd_check(gint x, gint y) {  
     osd_button_t but = OSD_NONE;  
636    
637      /* first do a rough test for the OSD area. */  /* place source selection at right border */
638      /* this is just to avoid an unnecessary detailed test */  #define OSD_S_RAD (Z_RAD)
639      if(x > OSD_X && x < OSD_X + OSD_W &&  #define OSD_S_X   (-OSD_X)
640         y > OSD_Y && y < OSD_Y + OSD_H) {  #define OSD_S_Y   (OSD_Y)
641          but = osm_gps_map_osd_check_dpad(x, y);  #define OSD_S_PW  (2 * Z_RAD)
642    #define OSD_S_W   (OSD_S_PW)
643    #define OSD_S_PH  (2 * Z_RAD)
644    #define OSD_S_H   (OSD_S_PH + OSD_SHADOW)
645    
646    /* size of usable area when expanded */
647    #define OSD_S_AREA_W (priv->source_sel.width)
648    #define OSD_S_AREA_H (priv->source_sel.height)
649    #define OSD_S_EXP_W  (OSD_S_PW + OSD_S_AREA_W + OSD_SHADOW)
650    #define OSD_S_EXP_H  (OSD_S_AREA_H + OSD_SHADOW)
651    
652    /* internal value to draw the arrow on the "puller" */
653    #define OSD_S_D0  (OSD_S_RAD/2)
654    #ifndef OSD_FONT_SIZE
655    #define OSD_FONT_SIZE (16.0)
656    #endif
657    #define OSD_TEXT_BORDER   (OSD_FONT_SIZE/2)
658    #define OSD_TEXT_SKIP     (OSD_FONT_SIZE/8)
659    
660          if(but == OSD_NONE)  /* draw the shape of the source selection OSD, either only the puller (not expanded) */
661              but = osm_gps_map_osd_check_zoom(x, y);  /* or the entire menu incl. the puller (expanded) */
662    static void
663    osd_source_shape(osd_priv_t *priv, cairo_t *cr, gint x, gint y) {
664        if(!priv->source_sel.expanded) {
665            /* just draw the puller */
666            cairo_move_to (cr, x + OSD_S_PW, y + OSD_S_PH);
667            cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
668            cairo_line_to (cr, x + OSD_S_PW, y);
669        } else {
670            /* draw the puller and the area itself */
671            cairo_move_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y + OSD_S_AREA_H);
672            cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H);
673            if(OSD_S_Y > 0) {
674                cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_PH);
675                cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
676            } else {
677                cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_AREA_H-OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
678                cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H - OSD_S_PH);
679                cairo_line_to (cr, x + OSD_S_PW, y);
680            }
681            cairo_line_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y);
682            cairo_close_path (cr);
683      }      }
   
     return but;  
684  }  }
685    
686  static void  static void
687  osm_gps_map_osd_shape_shadow(cairo_t *cr) {  osd_source_content(osm_gps_map_osd_t *osd, cairo_t *cr, gint offset) {
688      cairo_set_source_rgba (cr, 0, 0, 0, 0.2);      osd_priv_t *priv = (osd_priv_t*)osd->priv;
     cairo_fill (cr);  
     cairo_stroke (cr);  
 }  
689    
690  static void      int py = offset + OSD_S_RAD - OSD_S_D0;
 osm_gps_map_osd_shape(cairo_t *cr) {  
     cairo_set_source_rgb (cr, 1, 1, 1);  
     cairo_fill_preserve (cr);  
     cairo_set_source_rgb (cr, OSD_COLOR);  
     cairo_set_line_width (cr, 1);  
     cairo_stroke (cr);  
 }  
691    
692  static void      if(!priv->source_sel.expanded) {
693  osm_gps_map_osd_dpad_labels(cairo_t *cr, gint x, gint y) {          /* draw the "puller" open (<) arrow */
694      /* move reference to dpad center */          cairo_move_to (cr, offset + OSD_S_RAD + OSD_S_D0/2, py);
695      x += D_RAD;          cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
696      y += D_RAD;          cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
697        } else {
698            if(OSD_S_Y < 0)
699                py += OSD_S_AREA_H - OSD_S_PH;
700    
701            /* draw the "puller" close (>) arrow */
702            cairo_move_to (cr, offset + OSD_S_RAD - OSD_S_D0/2, py);
703            cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
704            cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
705            cairo_stroke(cr);
706    
707            /* don't draw a shadow for the text content */
708            if(offset == 1) {
709                gint source;
710                g_object_get(osd->widget, "map-source", &source, NULL);
711    
712                cairo_select_font_face (cr, "Sans",
713                                        CAIRO_FONT_SLANT_NORMAL,
714                                        CAIRO_FONT_WEIGHT_BOLD);
715                cairo_set_font_size (cr, OSD_FONT_SIZE);
716    
717                int i, step = (priv->source_sel.height - 2*OSD_TEXT_BORDER) /
718                    OSM_GPS_MAP_SOURCE_LAST;
719                for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
720                    cairo_text_extents_t extents;
721                    const char *src = osm_gps_map_source_get_friendly_name(i);
722                    cairo_text_extents (cr, src, &extents);
723    
724                    int x = offset + OSD_S_PW + OSD_TEXT_BORDER;
725                    int y = offset + step * (i-1) + OSD_TEXT_BORDER;
726    
727                    /* draw filled rectangle if selected */
728                    if(source == i) {
729                        cairo_rectangle(cr, x - OSD_TEXT_BORDER/2,
730                                        y - OSD_TEXT_SKIP,
731                                        priv->source_sel.width - OSD_TEXT_BORDER,
732                                        step + OSD_TEXT_SKIP);
733                        cairo_fill(cr);
734    
735                        /* temprarily draw with background color */
736    #ifndef OSD_COLOR
737                        GdkColor bg = osd->widget->style->bg[GTK_STATE_NORMAL];
738                        gdk_cairo_set_source_color(cr, &bg);
739    #else
740                        cairo_set_source_rgb (cr, OSD_COLOR_BG);
741    #endif
742                    }
743    
744      const static gint offset[][3][2] = {                  cairo_move_to (cr, x, y + OSD_TEXT_SKIP - extents.y_bearing);
745          /* left arrow/triangle */                  cairo_show_text (cr, src);
         { { -D_TIP+D_LEN, -D_WID }, { -D_LEN, D_WID }, { +D_LEN, D_WID } },  
         /* right arrow/triangle */  
         { { +D_TIP-D_LEN, -D_WID }, { +D_LEN, D_WID }, { -D_LEN, D_WID } },  
         /* top arrow/triangle */  
         { { -D_WID, -D_TIP+D_LEN }, { D_WID, -D_LEN }, { D_WID, +D_LEN } },  
         /* bottom arrow/triangle */  
         { { -D_WID, +D_TIP-D_LEN }, { D_WID, +D_LEN }, { D_WID, -D_LEN } }  
     };  
746    
747      int i;                  /* restore color */
748      for(i=0;i<4;i++) {                  if(source == i) {
749          cairo_move_to (cr, x + offset[i][0][0], y + offset[i][0][1]);  #ifndef OSD_COLOR
750          cairo_rel_line_to (cr, offset[i][1][0], offset[i][1][1]);                      GdkColor fg = osd->widget->style->fg[GTK_STATE_NORMAL];
751          cairo_rel_line_to (cr, offset[i][2][0], offset[i][2][1]);                      gdk_cairo_set_source_color(cr, &fg);
752    #else
753                        cairo_set_source_rgb (cr, OSD_COLOR);
754    #endif
755                    }
756                }
757            }
758      }      }
759  }  }
760    
 /* draw the sattelite dish icon in the center of the dpad */  
 #define GPS_V0  (D_RAD/8)  
 #define GPS_V1  (D_RAD/10)  
 #define GPS_V2  (D_RAD/5)  
   
 /* draw a satellite receiver dish */  
761  static void  static void
762  osm_gps_map_osd_dpad_gps(cairo_t *cr, gint x, gint y) {  osd_render_source_sel(osm_gps_map_osd_t *osd, gboolean force_rerender) {
763      /* move reference to dpad center */      FIN;
     x += D_RAD;  
     y += D_RAD + GPS_V0;  
   
     cairo_move_to (cr, x-GPS_V0, y+GPS_V0);  
     cairo_rel_line_to (cr, +GPS_V0, -GPS_V0);  
     cairo_rel_line_to (cr, +GPS_V0, +GPS_V0);  
     cairo_close_path (cr);  
764    
765      cairo_move_to (cr, x+GPS_V1-GPS_V2, y-2*GPS_V2);      osd_priv_t *priv = (osd_priv_t*)osd->priv;
     cairo_curve_to (cr, x-GPS_V2, y, x+GPS_V1, y+GPS_V1, x+GPS_V1+GPS_V2, y);  
     cairo_close_path (cr);  
766    
767      x += GPS_V1;      if(!priv->source_sel.surface ||
768      cairo_move_to (cr, x, y-GPS_V2);         (priv->source_sel.rendered && !force_rerender))
769      cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);          return;
770  }  
771        priv->source_sel.rendered = TRUE;
772    
773    #ifndef OSD_COLOR
774        GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
775        GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
776        GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
777    #endif
778    
779  #define Z_LEN  (2*Z_RAD/3)      /* draw source selector */
780        g_assert(priv->source_sel.surface);
781        cairo_t *cr = cairo_create(priv->source_sel.surface);
782        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
783        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
784        cairo_paint(cr);
785        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
786    
787  static void  #ifdef OSD_SHADOW_ENABLE
788  osm_gps_map_osd_zoom_labels(cairo_t *cr, gint x, gint y) {      osd_source_shape(priv, cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
789      cairo_move_to (cr, x + Z_LEFT  - Z_LEN, y + Z_MID);      osd_shape_shadow(cr);
790      cairo_line_to (cr, x + Z_LEFT  + Z_LEN, y + Z_MID);  #endif
791    
792      cairo_move_to (cr, x + Z_RIGHT,         y + Z_MID - Z_LEN);      osd_source_shape(priv, cr, 1, 1);
793      cairo_line_to (cr, x + Z_RIGHT,         y + Z_MID + Z_LEN);  #ifndef OSD_COLOR
794      cairo_move_to (cr, x + Z_RIGHT - Z_LEN, y + Z_MID);      osd_shape(cr, &bg, &fg);
795      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);  #else
796  }      osd_shape(cr);
797    #endif
798    
799  static void  #ifdef OSD_SHADOW_ENABLE
800  osm_gps_map_osd_labels(cairo_t *cr, gint width, gboolean enabled) {      osd_labels_shadow(cr, Z_RAD/3, TRUE);
801      if(enabled)  cairo_set_source_rgb (cr, OSD_COLOR);      osd_source_content(osd, cr, 1+OSD_LBL_SHADOW);
     else         cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);  
     cairo_set_line_width (cr, width);  
802      cairo_stroke (cr);      cairo_stroke (cr);
803  }  #endif
804    #ifndef OSD_COLOR
805  static void      osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
806  osm_gps_map_osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {  #else
807      cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);      osd_labels(cr, Z_RAD/3, TRUE);
808      cairo_set_line_width (cr, width);  #endif
809        osd_source_content(osd, cr, 1);
810      cairo_stroke (cr);      cairo_stroke (cr);
811    
812        cairo_destroy(cr);
813        FOUT;
814  }  }
815    
816    /* re-allocate the buffer used to draw the menu. This is used */
817    /* to collapse/expand the buffer */
818  static void  static void
819  osm_gps_map_osd_render(osm_gps_map_osd_t *osd) {  osd_source_reallocate(osm_gps_map_osd_t *osd) {
820        FIN;
821      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
822    
823      /* first fill with transparency */      /* re-allocate offscreen bitmap */
824      cairo_t *cr = cairo_create(priv->overlay);      g_assert (priv->source_sel.surface);
825      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);  
826        int w = OSD_S_W, h = OSD_S_H;
827        if(priv->source_sel.expanded) {
828            cairo_text_extents_t extents;
829    
830            /* determine content size */
831            g_assert(priv->source_sel.surface);
832            cairo_t *cr = cairo_create(priv->source_sel.surface);
833            cairo_select_font_face (cr, "Sans",
834                                    CAIRO_FONT_SLANT_NORMAL,
835                                    CAIRO_FONT_WEIGHT_BOLD);
836            cairo_set_font_size (cr, OSD_FONT_SIZE);
837    
838            /* calculate menu size */
839            int i, max_h = 0, max_w = 0;
840            for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
841                const char *src = osm_gps_map_source_get_friendly_name(i);
842                cairo_text_extents (cr, src, &extents);
843    
844                if(extents.width > max_w) max_w = extents.width;
845                if(extents.height > max_h) max_h = extents.height;
846            }
847            cairo_destroy(cr);
848    
849            priv->source_sel.width  = max_w + 2*OSD_TEXT_BORDER;
850            priv->source_sel.height = OSM_GPS_MAP_SOURCE_LAST *
851                (max_h + 2*OSD_TEXT_SKIP) + 2*OSD_TEXT_BORDER;
852    
853            w = OSD_S_EXP_W;
854            h = OSD_S_EXP_H;
855        }
856    
857        cairo_surface_destroy(priv->source_sel.surface);
858        priv->source_sel.surface =
859            cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w+2, h+2);
860    
861        osd_render_source_sel(osd, TRUE);
862        FOUT;
863    }
864    
865    #define OSD_HZ      15
866    #define OSD_TIME    500
867    
868    static gboolean osd_source_animate(gpointer data) {
869        FIN;
870        osm_gps_map_osd_t *osd = (osm_gps_map_osd_t*)data;
871        osd_priv_t *priv = (osd_priv_t*)osd->priv;
872        int diff = OSD_S_EXP_W - OSD_S_W - OSD_S_X;
873        gboolean done = FALSE;
874        priv->source_sel.count += priv->source_sel.dir;
875    
876        /* shifting in */
877        if(priv->source_sel.dir < 0) {
878            if(priv->source_sel.count <= 0) {
879                priv->source_sel.count = 0;
880                done = TRUE;
881            }
882        } else {
883            if(priv->source_sel.count >= 1000) {
884                priv->source_sel.expanded = FALSE;
885                osd_source_reallocate(osd);
886    
887                priv->source_sel.count = 1000;
888                done = TRUE;
889            }
890        }
891    
892    
893        /* count runs linearly from 0 to 1000, map this nicely onto a position */
894    
895        /* nice sinoid mapping */
896        float m = 0.5-cos(priv->source_sel.count * M_PI / 1000.0)/2;
897        priv->source_sel.shift =
898            (osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X) +
899            m * diff;
900    
901        /* make sure the screen is updated */
902        osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
903    
904        /* stop animation if done */
905        if(done)
906            priv->source_sel.handler_id = 0;
907    
908        FOUT;
909        return !done;
910    }
911    
912    /* switch between expand and collapse mode of source selection */
913    static void
914    osd_source_toggle(osm_gps_map_osd_t *osd)
915    {
916        FIN;
917        osd_priv_t *priv = (osd_priv_t*)osd->priv;
918    
919        /* ignore clicks while animation is running */
920        if(priv->source_sel.handler_id)
921            return;
922    
923        /* expand immediately, collapse is handle at the end of the */
924        /* collapse animation */
925        if(!priv->source_sel.expanded) {
926            priv->source_sel.expanded = TRUE;
927            osd_source_reallocate(osd);
928    
929            priv->source_sel.count = 1000;
930            priv->source_sel.shift = osd->widget->allocation.width - OSD_S_W;
931            priv->source_sel.dir = -1000/OSD_HZ;
932        } else {
933            priv->source_sel.count =  0;
934            priv->source_sel.shift = osd->widget->allocation.width -
935                OSD_S_EXP_W + OSD_S_X;
936            priv->source_sel.dir = +1000/OSD_HZ;
937        }
938    
939        /* start timer to handle animation */
940        priv->source_sel.handler_id = gtk_timeout_add(OSD_TIME/OSD_HZ,
941                                                      osd_source_animate, osd);
942        FOUT;
943    }
944    
945    /* check if the user clicked inside the source selection area */
946    static osd_button_t
947    osd_source_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y) {
948        FIN;
949        osd_priv_t *priv = (osd_priv_t*)osd->priv;
950    
951        if(!priv->source_sel.expanded)
952            x -= osd->widget->allocation.width - OSD_S_W;
953        else
954            x -= osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
955    
956        if(OSD_S_Y > 0)
957            y -= OSD_S_Y;
958        else
959            y -= osd->widget->allocation.height - OSD_S_PH + OSD_S_Y;
960    
961        /* within square around puller? */
962        if(y > 0 && y < OSD_S_PH && x > 0 && x < OSD_S_PW) {
963            /* really within puller shape? */
964            if(x > Z_RAD || osm_gps_map_in_circle(x, y, Z_RAD, Z_RAD, Z_RAD)) {
965                /* expand source selector */
966                if(down)
967                    osd_source_toggle(osd);
968    
969                /* tell upper layers that user clicked some background element */
970                /* of the OSD */
971                return OSD_BG;
972            }
973        }
974    
975        /* check for clicks into data area */
976        if(priv->source_sel.expanded && !priv->source_sel.handler_id) {
977            /* re-adjust from puller top to content top */
978            if(OSD_S_Y < 0)
979                y += OSD_S_EXP_H - OSD_S_PH;
980    
981            if(x > OSD_S_PW &&
982               x < OSD_S_PW + OSD_S_EXP_W &&
983               y > 0 &&
984               y < OSD_S_EXP_H) {
985    
986                int step = (priv->source_sel.height - 2*OSD_TEXT_BORDER)
987                    / OSM_GPS_MAP_SOURCE_LAST;
988    
989                y -= OSD_TEXT_BORDER - OSD_TEXT_SKIP;
990                y /= step;
991                y += 1;
992    
993                if(down) {
994                    gint old = 0;
995                    g_object_get(osd->widget, "map-source", &old, NULL);
996    
997                    if(y > OSM_GPS_MAP_SOURCE_NULL &&
998                       y <= OSM_GPS_MAP_SOURCE_LAST &&
999                       old != y) {
1000                        g_object_set(osd->widget, "map-source", y, NULL);
1001    
1002                        osd_render_source_sel(osd, TRUE);
1003                        osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
1004                    }
1005                }
1006    
1007                /* return "clicked in OSD background" to prevent further */
1008                /* processing by application */
1009                return OSD_BG;
1010            }
1011        }
1012    
1013        FOUT;
1014        return OSD_NONE;
1015    }
1016    #endif // OSD_SOURCE_SEL
1017    
1018    static osd_button_t
1019    osd_check_int(osm_gps_map_osd_t *osd, gboolean click, gboolean down, gint x, gint y) {
1020        FIN;
1021        osd_button_t but = OSD_NONE;
1022    
1023    #ifdef OSD_BALLOON
1024        if(down) {
1025            /* needed to handle balloons that are created at click */
1026            osd_priv_t *priv = (osd_priv_t*)osd->priv;
1027            priv->balloon.just_created = FALSE;
1028        }
1029    #endif
1030    
1031    #ifdef OSD_SOURCE_SEL
1032        /* the source selection area is handles internally */
1033        but = osd_source_check(osd, down, x, y);
1034    #endif
1035    
1036        if(but == OSD_NONE) {
1037            gint mx = x - OSD_X;
1038            gint my = y - OSD_Y;
1039    
1040            if(OSD_X < 0)
1041                mx -= (osd->widget->allocation.width - OSD_W);
1042    
1043            if(OSD_Y < 0)
1044                my -= (osd->widget->allocation.height - OSD_H);
1045    
1046            /* first do a rough test for the OSD area. */
1047            /* this is just to avoid an unnecessary detailed test */
1048            if(mx > 0 && mx < OSD_W && my > 0 && my < OSD_H) {
1049    #ifndef OSD_NO_DPAD
1050                but = osd_check_dpad(mx, my);
1051    #endif
1052            }
1053    
1054            if(but == OSD_NONE)
1055                but = osd_check_zoom(mx, my);
1056        }
1057    
1058    #ifdef OSD_BALLOON
1059        if(but == OSD_NONE) {
1060            /* check if user clicked into balloon */
1061            if(osd_balloon_check(osd, click, down, x, y))
1062                but = OSD_BG;
1063        }
1064    #endif
1065    
1066        FOUT;
1067        return but;
1068    }
1069    
1070    #ifndef OSD_NO_DPAD
1071    static void
1072    osd_dpad_labels(cairo_t *cr, gint x, gint y) {
1073        /* move reference to dpad center */
1074        x += D_RAD;
1075        y += D_RAD;
1076    
1077        const static gint offset[][3][2] = {
1078            /* left arrow/triangle */
1079            { { -D_TIP+D_LEN, -D_WID }, { -D_LEN, D_WID }, { +D_LEN, D_WID } },
1080            /* right arrow/triangle */
1081            { { +D_TIP-D_LEN, -D_WID }, { +D_LEN, D_WID }, { -D_LEN, D_WID } },
1082            /* top arrow/triangle */
1083            { { -D_WID, -D_TIP+D_LEN }, { D_WID, -D_LEN }, { D_WID, +D_LEN } },
1084            /* bottom arrow/triangle */
1085            { { -D_WID, +D_TIP-D_LEN }, { D_WID, +D_LEN }, { D_WID, -D_LEN } }
1086        };
1087    
1088        int i;
1089        for(i=0;i<4;i++) {
1090            cairo_move_to (cr, x + offset[i][0][0], y + offset[i][0][1]);
1091            cairo_rel_line_to (cr, offset[i][1][0], offset[i][1][1]);
1092            cairo_rel_line_to (cr, offset[i][2][0], offset[i][2][1]);
1093        }
1094    }
1095    #endif
1096    
1097    #ifdef OSD_GPS_BUTTON
1098    /* draw the satellite dish icon in the center of the dpad */
1099    #define GPS_V0  (D_RAD/7)
1100    #define GPS_V1  (D_RAD/10)
1101    #define GPS_V2  (D_RAD/5)
1102    
1103    /* draw a satellite receiver dish */
1104    /* this is either drawn in the center of the dpad (if present) */
1105    /* or in the middle of the zoom area */
1106    static void
1107    osd_dpad_gps(cairo_t *cr, gint x, gint y) {
1108        /* move reference to dpad center */
1109        x += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD * 3;
1110        y += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD + GPS_V0;
1111    
1112        cairo_move_to (cr, x-GPS_V0, y+GPS_V0);
1113        cairo_rel_line_to (cr, +GPS_V0, -GPS_V0);
1114        cairo_rel_line_to (cr, +GPS_V0, +GPS_V0);
1115        cairo_close_path (cr);
1116    
1117        cairo_move_to (cr, x+GPS_V1-GPS_V2, y-2*GPS_V2);
1118        cairo_curve_to (cr, x-GPS_V2, y, x+GPS_V1, y+GPS_V1, x+GPS_V1+GPS_V2, y);
1119        cairo_close_path (cr);
1120    
1121        x += GPS_V1;
1122        cairo_move_to (cr, x, y-GPS_V2);
1123        cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);
1124    }
1125    #endif
1126    
1127    #define Z_LEN  (2*Z_RAD/3)
1128    
1129    static void
1130    osd_zoom_labels(cairo_t *cr, gint x, gint y) {
1131        cairo_move_to (cr, x + Z_LEFT  - Z_LEN, y + Z_MID);
1132        cairo_line_to (cr, x + Z_LEFT  + Z_LEN, y + Z_MID);
1133    
1134        cairo_move_to (cr, x + Z_RIGHT,         y + Z_MID - Z_LEN);
1135        cairo_line_to (cr, x + Z_RIGHT,         y + Z_MID + Z_LEN);
1136        cairo_move_to (cr, x + Z_RIGHT - Z_LEN, y + Z_MID);
1137        cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);
1138    }
1139    
1140    #ifdef OSD_COORDINATES
1141    
1142    #ifndef OSD_COORDINATES_FONT_SIZE
1143    #define OSD_COORDINATES_FONT_SIZE (12.0)
1144    #endif
1145    
1146    #define OSD_COORDINATES_OFFSET (OSD_COORDINATES_FONT_SIZE/6)
1147    
1148    #define OSD_COORDINATES_W  (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET)
1149    #define OSD_COORDINATES_H  (2*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET+OSD_COORDINATES_FONT_SIZE/4)
1150    
1151    /* these can be overwritten with versions that support */
1152    /* localization */
1153    #ifndef OSD_COORDINATES_CHR_N
1154    #define OSD_COORDINATES_CHR_N  "N"
1155    #endif
1156    #ifndef OSD_COORDINATES_CHR_S
1157    #define OSD_COORDINATES_CHR_S  "S"
1158    #endif
1159    #ifndef OSD_COORDINATES_CHR_E
1160    #define OSD_COORDINATES_CHR_E  "E"
1161    #endif
1162    #ifndef OSD_COORDINATES_CHR_W
1163    #define OSD_COORDINATES_CHR_W  "W"
1164    #endif
1165    
1166    
1167    
1168    /* this is the classic geocaching notation */
1169    static char
1170    *osd_latitude_str(float latitude) {
1171        char *c = OSD_COORDINATES_CHR_N;
1172        float integral, fractional;
1173    
1174        if(isnan(latitude))
1175            return NULL;
1176    
1177        if(latitude < 0) {
1178            latitude = fabs(latitude);
1179            c = OSD_COORDINATES_CHR_S;
1180        }
1181    
1182        fractional = modff(latitude, &integral);
1183    
1184        return g_strdup_printf("%s %02d° %06.3f'",
1185                               c, (int)integral, fractional*60.0);
1186    }
1187    
1188    static char
1189    *osd_longitude_str(float longitude) {
1190        char *c = OSD_COORDINATES_CHR_E;
1191        float integral, fractional;
1192    
1193        if(isnan(longitude))
1194            return NULL;
1195    
1196        if(longitude < 0) {
1197            longitude = fabs(longitude);
1198            c = OSD_COORDINATES_CHR_W;
1199        }
1200    
1201        fractional = modff(longitude, &integral);
1202    
1203        return g_strdup_printf("%s %03d° %06.3f'",
1204                               c, (int)integral, fractional*60.0);
1205    }
1206    
1207    /* render a string at the given screen position */
1208    static int
1209    osd_render_centered_text(cairo_t *cr, int y, int width, char *text) {
1210        FIN;
1211    
1212        if(!text) return y;
1213    
1214        char *p = g_malloc(strlen(text)+4);  // space for "...\n"
1215        strcpy(p, text);
1216    
1217        cairo_text_extents_t extents;
1218        memset(&extents, 0, sizeof(cairo_text_extents_t));
1219        cairo_text_extents (cr, p, &extents);
1220        g_assert(extents.width != 0.0);
1221    
1222        /* check if text needs to be truncated */
1223        int trunc_at = strlen(text);
1224        while(extents.width > width) {
1225    
1226            /* cut off all utf8 multibyte remains so the actual */
1227            /* truncation only deals with one byte */
1228            while((p[trunc_at-1] & 0xc0) == 0x80) {
1229                trunc_at--;
1230                g_assert(trunc_at > 0);
1231            }
1232    
1233            trunc_at--;
1234            g_assert(trunc_at > 0);
1235    
1236            strcpy(p+trunc_at, "...");
1237            cairo_text_extents (cr, p, &extents);
1238        }
1239    
1240        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
1241        cairo_set_line_width (cr, OSD_COORDINATES_FONT_SIZE/6);
1242        cairo_move_to (cr, (width - extents.width)/2, y - extents.y_bearing);
1243        cairo_text_path (cr, p);
1244        cairo_stroke (cr);
1245    
1246        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
1247        cairo_move_to (cr, (width - extents.width)/2, y - extents.y_bearing);
1248        cairo_show_text (cr, p);
1249    
1250        g_free(p);
1251    
1252        /* skip + 1/5 line */
1253        FOUT;
1254        return y + 6*OSD_COORDINATES_FONT_SIZE/5;
1255    }
1256    
1257    static void
1258    osd_render_coordinates(osm_gps_map_osd_t *osd)
1259    {
1260        FIN;
1261        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1262    
1263        if(!priv->coordinates.surface)
1264            return;
1265    
1266        /* get current map position */
1267        gfloat lat, lon;
1268        g_object_get(osd->widget, "latitude", &lat, "longitude", &lon, NULL);
1269    
1270        /* check if position has changed enough to require redraw */
1271        if(!isnan(priv->coordinates.lat) && !isnan(priv->coordinates.lon))
1272            /* 1/60000 == 1/1000 minute */
1273            if((fabsf(lat - priv->coordinates.lat) < 1/60000) &&
1274               (fabsf(lon - priv->coordinates.lon) < 1/60000))
1275                return;
1276    
1277        priv->coordinates.lat = lat;
1278        priv->coordinates.lon = lon;
1279    
1280        /* first fill with transparency */
1281    
1282        g_assert(priv->coordinates.surface);
1283        cairo_t *cr = cairo_create(priv->coordinates.surface);
1284        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1285        //    cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 0.5);
1286        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
1287        cairo_paint(cr);
1288        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1289    
1290        cairo_select_font_face (cr, "Sans",
1291                                CAIRO_FONT_SLANT_NORMAL,
1292                                CAIRO_FONT_WEIGHT_BOLD);
1293        cairo_set_font_size (cr, OSD_COORDINATES_FONT_SIZE);
1294    
1295        char *latitude = osd_latitude_str(lat);
1296        char *longitude = osd_longitude_str(lon);
1297    
1298        int y = OSD_COORDINATES_OFFSET;
1299        y = osd_render_centered_text(cr, y, OSD_COORDINATES_W, latitude);
1300        y = osd_render_centered_text(cr, y, OSD_COORDINATES_W, longitude);
1301    
1302        g_free(latitude);
1303        g_free(longitude);
1304    
1305        cairo_destroy(cr);
1306        FOUT;
1307    }
1308    #endif  // OSD_COORDINATES
1309    
1310    #ifdef OSD_NAV
1311    #define OSD_NAV_W  (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET)
1312    #define OSD_NAV_H  (11*OSD_COORDINATES_FONT_SIZE)
1313    
1314    /* http://mathforum.org/library/drmath/view/55417.html */
1315    static float get_bearing(float lat1, float lon1, float lat2, float lon2) {
1316      return atan2( sin(lon2 - lon1) * cos(lat2),
1317                    cos(lat1) * sin(lat2) -
1318                    sin(lat1) * cos(lat2) * cos(lon2 - lon1));
1319    }
1320    
1321    /* http://mathforum.org/library/drmath/view/51722.html */
1322    static float get_distance(float lat1, float lon1, float lat2, float lon2) {
1323      float aob = acos(cos(lat1) * cos(lat2) * cos(lon2 - lon1) +
1324                       sin(lat1) * sin(lat2));
1325    
1326      //  return(aob * 3959.0);   /* great circle radius in miles */
1327    
1328      return(aob * 6371000.0);     /* great circle radius in meters */
1329    }
1330    
1331    static void
1332    osd_render_nav(osm_gps_map_osd_t *osd)
1333    {
1334        FIN;
1335        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1336    
1337        if(!priv->nav.surface || isnan(priv->nav.lat) || isnan(priv->nav.lon))
1338            return;
1339    
1340        /* first fill with transparency */
1341        g_assert(priv->nav.surface);
1342        cairo_t *cr = cairo_create(priv->nav.surface);
1343        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1344        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
1345        cairo_paint(cr);
1346        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1347    
1348        cairo_select_font_face (cr, "Sans",
1349                                CAIRO_FONT_SLANT_NORMAL,
1350                                CAIRO_FONT_WEIGHT_BOLD);
1351        cairo_set_font_size (cr, OSD_COORDINATES_FONT_SIZE);
1352    
1353        char *latitude = osd_latitude_str(priv->nav.lat);
1354        char *longitude = osd_longitude_str(priv->nav.lon);
1355    
1356        int y = OSD_COORDINATES_OFFSET;
1357        y = osd_render_centered_text(cr, y, OSD_NAV_W, priv->nav.name);
1358        y = osd_render_centered_text(cr, y, OSD_NAV_W, latitude);
1359        y = osd_render_centered_text(cr, y, OSD_NAV_W, longitude);
1360    
1361        g_free(latitude);
1362        g_free(longitude);
1363    
1364        /* draw the compass */
1365        int radius = (OSD_NAV_H - y - 5*OSD_COORDINATES_FONT_SIZE/4)/2;
1366        if(radius > OSD_NAV_W/2)
1367            radius = OSD_NAV_W/2;
1368    
1369        int x = OSD_NAV_W/2+1;
1370        y += radius;
1371    
1372        cairo_stroke (cr);
1373    
1374        /* draw background */
1375        cairo_arc(cr, x, y, radius, 0,  2*M_PI);
1376        cairo_set_source_rgba (cr, 1, 1, 1, 0.5);
1377        cairo_fill_preserve (cr);
1378        cairo_set_source_rgb (cr, 0, 0, 0);
1379        cairo_set_line_width (cr, 1);
1380        cairo_stroke (cr);
1381    
1382        /* draw pointer */
1383    #define ARROW_WIDTH     0.3
1384    #define ARROW_LENGTH    0.7
1385    
1386        coord_t *gps = osm_gps_map_get_gps (OSM_GPS_MAP(osd->widget));
1387        if(gps) {
1388            float arot = get_bearing(gps->rlat, gps->rlon,
1389                         deg2rad(priv->nav.lat), deg2rad(priv->nav.lon));
1390    
1391            cairo_move_to(cr,
1392                          x + radius *  ARROW_LENGTH *  sin(arot),
1393                          y + radius *  ARROW_LENGTH * -cos(arot));
1394    
1395            cairo_line_to(cr,
1396                          x + radius * -ARROW_LENGTH *  sin(arot+ARROW_WIDTH),
1397                          y + radius * -ARROW_LENGTH * -cos(arot+ARROW_WIDTH));
1398    
1399            cairo_line_to(cr,
1400                          x + radius * -0.5 * ARROW_LENGTH *  sin(arot),
1401                          y + radius * -0.5 * ARROW_LENGTH * -cos(arot));
1402    
1403            cairo_line_to(cr,
1404                          x + radius * -ARROW_LENGTH *  sin(arot-ARROW_WIDTH),
1405                          y + radius * -ARROW_LENGTH * -cos(arot-ARROW_WIDTH));
1406    
1407            cairo_close_path(cr);
1408            cairo_set_source_rgb (cr, 0, 0, 0);
1409            cairo_fill (cr);
1410    
1411            y += radius + OSD_COORDINATES_FONT_SIZE/4;
1412    
1413            float dist = get_distance(gps->rlat, gps->rlon,
1414                            deg2rad(priv->nav.lat), deg2rad(priv->nav.lon));
1415    
1416            char *dist_str = NULL;
1417            if(!priv->nav.imperial) {
1418                /* metric is easy ... */
1419                if(dist<1000)
1420                    dist_str = g_strdup_printf("%u m", (int)dist);
1421                else
1422                    dist_str = g_strdup_printf("%.1f km", dist/1000);
1423            } else {
1424                /* and now the hard part: scale for useful imperial values :-( */
1425                /* try to convert to feet, 1ft == 0.3048 m */
1426    
1427                if(dist/(3*0.3048) >= 1760.0)      /* more than 1760 yard? */
1428                    dist_str = g_strdup_printf("%.1f mi", dist/(0.3048*3*1760.0));
1429                else if(dist/0.3048 >= 100)        /* more than 100 feet? */
1430                    dist_str = g_strdup_printf("%.1f yd", dist/(0.3048*3));
1431                else
1432                    dist_str = g_strdup_printf("%.0f ft", dist/0.3048);
1433            }
1434    
1435            y = osd_render_centered_text(cr, y, OSD_NAV_W, dist_str);
1436            g_free(dist_str);
1437        }
1438    
1439        cairo_destroy(cr);
1440        FOUT;
1441    }
1442    
1443    void osm_gps_map_osd_clear_nav (OsmGpsMap *map) {
1444        FIN;
1445        g_return_if_fail (OSM_IS_GPS_MAP (map));
1446    
1447        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1448        g_return_if_fail (osd);
1449    
1450        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1451        g_return_if_fail (priv);
1452    
1453        if(priv->nav.surface) {
1454            cairo_surface_destroy(priv->nav.surface);
1455            priv->nav.surface = NULL;
1456            priv->nav.lat = OSM_GPS_MAP_INVALID;
1457            priv->nav.lon = OSM_GPS_MAP_INVALID;
1458            if(priv->nav.name) g_free(priv->nav.name);
1459        }
1460        osm_gps_map_redraw(map);
1461        FOUT;
1462    }
1463    
1464    void
1465    osm_gps_map_osd_draw_nav (OsmGpsMap *map, gboolean imperial,
1466                              float latitude, float longitude, char *name) {
1467        FIN;
1468        g_return_if_fail (OSM_IS_GPS_MAP (map));
1469    
1470        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1471        g_return_if_fail (osd);
1472    
1473        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1474        g_return_if_fail (priv);
1475    
1476        osm_gps_map_osd_clear_nav (map);
1477    
1478        /* allocate balloon surface */
1479        priv->nav.surface =
1480            cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1481                                       OSD_NAV_W+2, OSD_NAV_H+2);
1482    
1483        priv->nav.lat = latitude;
1484        priv->nav.lon = longitude;
1485        priv->nav.name = g_strdup(name);
1486        priv->nav.imperial = imperial;
1487    
1488        osd_render_nav(osd);
1489    
1490        osm_gps_map_redraw(map);
1491        FOUT;
1492    }
1493    
1494    #endif // OSD_NAV
1495    
1496    
1497    #ifdef OSD_CROSSHAIR
1498    
1499    #ifndef OSD_CROSSHAIR_RADIUS
1500    #define OSD_CROSSHAIR_RADIUS 10
1501    #endif
1502    
1503    #define OSD_CROSSHAIR_TICK  (OSD_CROSSHAIR_RADIUS/2)
1504    #define OSD_CROSSHAIR_BORDER (OSD_CROSSHAIR_TICK + OSD_CROSSHAIR_RADIUS/4)
1505    #define OSD_CROSSHAIR_W  ((OSD_CROSSHAIR_RADIUS+OSD_CROSSHAIR_BORDER)*2)
1506    #define OSD_CROSSHAIR_H  ((OSD_CROSSHAIR_RADIUS+OSD_CROSSHAIR_BORDER)*2)
1507    
1508    static void
1509    osd_render_crosshair_shape(cairo_t *cr) {
1510        FIN;
1511        cairo_arc (cr, OSD_CROSSHAIR_W/2, OSD_CROSSHAIR_H/2,
1512                   OSD_CROSSHAIR_RADIUS, 0,  2*M_PI);
1513    
1514        cairo_move_to (cr, OSD_CROSSHAIR_W/2 - OSD_CROSSHAIR_RADIUS,
1515                       OSD_CROSSHAIR_H/2);
1516        cairo_rel_line_to (cr, -OSD_CROSSHAIR_TICK, 0);
1517        cairo_move_to (cr, OSD_CROSSHAIR_W/2 + OSD_CROSSHAIR_RADIUS,
1518                       OSD_CROSSHAIR_H/2);
1519        cairo_rel_line_to (cr,  OSD_CROSSHAIR_TICK, 0);
1520    
1521        cairo_move_to (cr, OSD_CROSSHAIR_W/2,
1522                       OSD_CROSSHAIR_H/2 - OSD_CROSSHAIR_RADIUS);
1523        cairo_rel_line_to (cr, 0, -OSD_CROSSHAIR_TICK);
1524        cairo_move_to (cr, OSD_CROSSHAIR_W/2,
1525                       OSD_CROSSHAIR_H/2 + OSD_CROSSHAIR_RADIUS);
1526        cairo_rel_line_to (cr, 0, OSD_CROSSHAIR_TICK);
1527    
1528        cairo_stroke (cr);
1529        FOUT;
1530    }
1531    
1532    static void
1533    osd_render_crosshair(osm_gps_map_osd_t *osd)
1534    {
1535        FIN;
1536        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1537    
1538        if(!priv->crosshair.surface || priv->crosshair.rendered)
1539            return;
1540    
1541        priv->crosshair.rendered = TRUE;
1542    
1543        /* first fill with transparency */
1544        g_assert(priv->crosshair.surface);
1545        cairo_t *cr = cairo_create(priv->crosshair.surface);
1546        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1547        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
1548        cairo_paint(cr);
1549        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1550    
1551        cairo_set_line_cap  (cr, CAIRO_LINE_CAP_ROUND);
1552    
1553        cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.5);
1554        cairo_set_line_width (cr, OSD_CROSSHAIR_RADIUS/2);
1555        osd_render_crosshair_shape(cr);
1556    
1557        cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.5);
1558        cairo_set_line_width (cr, OSD_CROSSHAIR_RADIUS/4);
1559        osd_render_crosshair_shape(cr);
1560    
1561        cairo_destroy(cr);
1562        FOUT;
1563    }
1564    #endif
1565    
1566    #ifdef OSD_SCALE
1567    
1568    #ifndef OSD_SCALE_FONT_SIZE
1569    #define OSD_SCALE_FONT_SIZE (12.0)
1570    #endif
1571    #define OSD_SCALE_W   (10*OSD_SCALE_FONT_SIZE)
1572    #define OSD_SCALE_H   (5*OSD_SCALE_FONT_SIZE/2)
1573    
1574    /* various parameters used to create the scale */
1575    #define OSD_SCALE_H2   (OSD_SCALE_H/2)
1576    #define OSD_SCALE_TICK (2*OSD_SCALE_FONT_SIZE/3)
1577    #define OSD_SCALE_M    (OSD_SCALE_H2 - OSD_SCALE_TICK)
1578    #define OSD_SCALE_I    (OSD_SCALE_H2 + OSD_SCALE_TICK)
1579    #define OSD_SCALE_FD   (OSD_SCALE_FONT_SIZE/4)
1580    
1581    static void
1582    osd_render_scale(osm_gps_map_osd_t *osd)
1583    {
1584        FIN;
1585        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1586    
1587        if(!priv->scale.surface)
1588            return;
1589    
1590        /* this only needs to be rendered if the zoom has changed */
1591        gint zoom;
1592        g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);
1593        if(zoom == priv->scale.zoom)
1594            return;
1595    
1596        priv->scale.zoom = zoom;
1597    
1598        float m_per_pix = osm_gps_map_get_scale(OSM_GPS_MAP(osd->widget));
1599    
1600        /* first fill with transparency */
1601        g_assert(priv->scale.surface);
1602        cairo_t *cr = cairo_create(priv->scale.surface);
1603        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1604      cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);      cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
1605        // pink for testing:    cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2);
1606      cairo_paint(cr);      cairo_paint(cr);
1607        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1608    
1609        /* determine the size of the scale width in meters */
1610        float width = (OSD_SCALE_W-OSD_SCALE_FONT_SIZE/6) * m_per_pix;
1611    
1612        /* scale this to useful values */
1613        int exp = logf(width)*M_LOG10E;
1614        int mant = width/pow(10,exp);
1615        int width_metric = mant * pow(10,exp);
1616        char *dist_str = NULL;
1617        if(width_metric<1000)
1618            dist_str = g_strdup_printf("%u m", width_metric);
1619        else
1620            dist_str = g_strdup_printf("%u km", width_metric/1000);
1621        width_metric /= m_per_pix;
1622    
1623        /* and now the hard part: scale for useful imperial values :-( */
1624        /* try to convert to feet, 1ft == 0.3048 m */
1625        width /= 0.3048;
1626        float imp_scale = 0.3048;
1627        char *dist_imp_unit = "ft";
1628    
1629        if(width >= 100) {
1630            /* 1yd == 3 feet */
1631            width /= 3.0;
1632            imp_scale *= 3.0;
1633            dist_imp_unit = "yd";
1634    
1635            if(width >= 1760.0) {
1636                /* 1mi == 1760 yd */
1637                width /= 1760.0;
1638                imp_scale *= 1760.0;
1639                dist_imp_unit = "mi";
1640            }
1641        }
1642    
1643        /* also convert this to full tens/hundreds */
1644        exp = logf(width)*M_LOG10E;
1645        mant = width/pow(10,exp);
1646        int width_imp = mant * pow(10,exp);
1647        char *dist_str_imp = g_strdup_printf("%u %s", width_imp, dist_imp_unit);
1648    
1649        /* convert back to pixels */
1650        width_imp *= imp_scale;
1651        width_imp /= m_per_pix;
1652    
1653        cairo_select_font_face (cr, "Sans",
1654                                CAIRO_FONT_SLANT_NORMAL,
1655                                CAIRO_FONT_WEIGHT_BOLD);
1656        cairo_set_font_size (cr, OSD_SCALE_FONT_SIZE);
1657        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
1658    
1659        cairo_text_extents_t extents;
1660        cairo_text_extents (cr, dist_str, &extents);
1661    
1662        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
1663        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6);
1664        cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD);
1665        cairo_text_path (cr, dist_str);
1666        cairo_stroke (cr);
1667        cairo_move_to (cr, 2*OSD_SCALE_FD,
1668                       OSD_SCALE_H2+OSD_SCALE_FD + extents.height);
1669        cairo_text_path (cr, dist_str_imp);
1670        cairo_stroke (cr);
1671    
1672        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
1673        cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD);
1674        cairo_show_text (cr, dist_str);
1675        cairo_move_to (cr, 2*OSD_SCALE_FD,
1676                       OSD_SCALE_H2+OSD_SCALE_FD + extents.height);
1677        cairo_show_text (cr, dist_str_imp);
1678    
1679        g_free(dist_str);
1680        g_free(dist_str_imp);
1681    
1682        /* draw white line */
1683        cairo_set_line_cap  (cr, CAIRO_LINE_CAP_ROUND);
1684        cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);
1685        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/3);
1686        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M);
1687        cairo_rel_line_to (cr, 0,  OSD_SCALE_TICK);
1688        cairo_rel_line_to (cr, width_metric, 0);
1689        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1690        cairo_stroke(cr);
1691        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I);
1692        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1693        cairo_rel_line_to (cr, width_imp, 0);
1694        cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK);
1695        cairo_stroke(cr);
1696    
1697        /* draw black line */
1698        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
1699        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6);
1700        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M);
1701        cairo_rel_line_to (cr, 0,  OSD_SCALE_TICK);
1702        cairo_rel_line_to (cr, width_metric, 0);
1703        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1704        cairo_stroke(cr);
1705        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I);
1706        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1707        cairo_rel_line_to (cr, width_imp, 0);
1708        cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK);
1709        cairo_stroke(cr);
1710    
1711        cairo_destroy(cr);
1712        FOUT;
1713    }
1714    #endif
1715    
1716    static void
1717    osd_render_controls(osm_gps_map_osd_t *osd)
1718    {
1719        FIN;
1720        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1721    
1722        if(!priv->controls.surface)
1723            return;
1724    
1725        if(priv->controls.rendered
1726    #ifdef OSD_GPS_BUTTON
1727           && (priv->controls.gps_enabled == (osd->cb != NULL))
1728    #endif
1729           )
1730            return;
1731    
1732    #ifdef OSD_GPS_BUTTON
1733        priv->controls.gps_enabled = (osd->cb != NULL);
1734    #endif
1735        priv->controls.rendered = TRUE;
1736    
1737    #ifndef OSD_COLOR
1738        GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
1739        GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
1740        GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
1741    #endif
1742    
1743        /* first fill with transparency */
1744        g_assert(priv->controls.surface);
1745        cairo_t *cr = cairo_create(priv->controls.surface);
1746        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1747        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
1748        cairo_paint(cr);
1749      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1750    
1751      /* --------- draw zoom and dpad shape shadow ----------- */      /* --------- draw zoom and dpad shape shadow ----------- */
1752      gint x = 0, y = 0;  #ifdef OSD_SHADOW_ENABLE
1753        osd_zoom_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
1754      osm_gps_map_osd_zoom_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);      osd_shape_shadow(cr);
1755      osm_gps_map_osd_shape_shadow(cr);  #ifndef OSD_NO_DPAD
1756      osm_gps_map_osd_dpad_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);      osd_dpad_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
1757      osm_gps_map_osd_shape_shadow(cr);      osd_shape_shadow(cr);
1758    #endif
1759    #endif
1760    
1761      /* --------- draw zoom and dpad shape ----------- */      /* --------- draw zoom and dpad shape ----------- */
1762    
1763      osm_gps_map_osd_zoom_shape(cr, x, y);      osd_zoom_shape(cr, 1, 1);
1764      osm_gps_map_osd_shape(cr);  #ifndef OSD_COLOR
1765      osm_gps_map_osd_dpad_shape(cr, x, y);      osd_shape(cr, &bg, &fg);
1766      osm_gps_map_osd_shape(cr);  #else
1767        osd_shape(cr);
1768    #endif
1769    #ifndef OSD_NO_DPAD
1770        osd_dpad_shape(cr, 1, 1);
1771    #ifndef OSD_COLOR
1772        osd_shape(cr, &bg, &fg);
1773    #else
1774        osd_shape(cr);
1775    #endif
1776    #endif
1777    
1778      /* --------- draw zoom and dpad labels --------- */      /* --------- draw zoom and dpad labels --------- */
1779    
1780      osm_gps_map_osd_zoom_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);  #ifdef OSD_SHADOW_ENABLE
1781      osm_gps_map_osd_dpad_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);      osd_labels_shadow(cr, Z_RAD/3, TRUE);
1782      osm_gps_map_osd_labels_shadow(cr, Z_RAD/3, TRUE);      osd_zoom_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
1783      osm_gps_map_osd_dpad_gps(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);  #ifndef OSD_NO_DPAD
1784      osm_gps_map_osd_labels_shadow(cr, Z_RAD/6, osd->cb != NULL);      osd_dpad_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
1785    #endif
1786      osm_gps_map_osd_zoom_labels(cr, x, y);      cairo_stroke(cr);
1787      osm_gps_map_osd_dpad_labels(cr, x, y);  #ifdef OSD_GPS_BUTTON
1788      osm_gps_map_osd_labels(cr, Z_RAD/3, TRUE);      osd_labels_shadow(cr, Z_RAD/6, osd->cb != NULL);
1789      osm_gps_map_osd_dpad_gps(cr, x, y);      osd_dpad_gps(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
1790      osm_gps_map_osd_labels(cr, Z_RAD/6, osd->cb != NULL);      cairo_stroke(cr);
1791    #endif
1792    #endif
1793    
1794    #ifndef OSD_COLOR
1795        osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
1796    #else
1797        osd_labels(cr, Z_RAD/3, TRUE);
1798    #endif
1799        osd_zoom_labels(cr, 1, 1);
1800    #ifndef OSD_NO_DPAD
1801        osd_dpad_labels(cr, 1, 1);
1802    #endif
1803        cairo_stroke(cr);
1804    
1805    #ifndef OSD_COLOR
1806        osd_labels(cr, Z_RAD/6, osd->cb != NULL, &fg, &da);
1807    #else
1808        osd_labels(cr, Z_RAD/6, osd->cb != NULL);
1809    #endif
1810    #ifdef OSD_GPS_BUTTON
1811        osd_dpad_gps(cr, 1, 1);
1812    #endif
1813        cairo_stroke(cr);
1814    
1815      cairo_destroy(cr);      cairo_destroy(cr);
1816  }  }
1817    
1818  static void  static void
1819  osm_gps_map_osd_draw(osm_gps_map_osd_t *osd, gint xoffset, gint yoffset)  osd_render(osm_gps_map_osd_t *osd)
1820  {  {
1821      osd_priv_t *priv = (osd_priv_t*)osd->priv;      /* this function is actually called pretty often since the */
1822        /* OSD contents may have changed (due to a coordinate/zoom change). */
1823        /* The different OSD parts have to make sure that they don't */
1824        /* render unneccessarily often and thus waste CPU power */
1825    
1826      /* backup previous contents */      osd_render_controls(osd);
     if(!priv->backup)  
         priv->backup = gdk_pixmap_new(osd->pixmap, OSD_W+2, OSD_H+2, -1);  
1827    
1828      gint x = OSD_X + xoffset;  #ifdef OSD_SOURCE_SEL
1829      gint y = OSD_Y + yoffset;      osd_render_source_sel(osd, FALSE);
1830    #endif
1831    
1832    #ifdef OSD_SCALE
1833        osd_render_scale(osd);
1834    #endif
1835    
1836    #ifdef OSD_CROSSHAIR
1837        osd_render_crosshair(osd);
1838    #endif
1839    
1840    #ifdef OSD_NAV
1841        osd_render_nav(osd);
1842    #endif
1843    
1844      /* create backup of background */  #ifdef OSD_COORDINATES
1845      gdk_draw_drawable(priv->backup,      osd_render_coordinates(osd);
1846          osd->widget->style->fg_gc[GTK_WIDGET_STATE(osd->widget)],  #endif
1847                        osd->pixmap, x-1, y-1, 0, 0, OSD_W+2, OSD_H+2);  }
1848    
1849      priv->backup_x = x-1;  static void
1850      priv->backup_y = y-1;  osd_draw(osm_gps_map_osd_t *osd, GdkDrawable *drawable)
1851    {
1852        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1853    
1854      /* OSD itself uses some off-screen rendering, so check if the */      /* OSD itself uses some off-screen rendering, so check if the */
1855      /* offscreen buffer is present and create it if not */      /* offscreen buffer is present and create it if not */
1856      if(!priv->overlay) {      if(!priv->controls.surface) {
1857          /* create overlay ... */          /* create overlay ... */
1858          priv->overlay =          priv->controls.surface =
1859              cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W, OSD_H);              cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W+2, OSD_H+2);
1860    
1861            priv->controls.rendered = FALSE;
1862    #ifdef OSD_GPS_BUTTON
1863            priv->controls.gps_enabled = FALSE;
1864    #endif
1865    
1866    #ifdef OSD_SOURCE_SEL
1867            /* the initial OSD state is alway not-expanded */
1868            priv->source_sel.surface =
1869                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1870                                               OSD_S_W+2, OSD_S_H+2);
1871            priv->source_sel.rendered = FALSE;
1872    #endif
1873    
1874    #ifdef OSD_SCALE
1875            priv->scale.surface =
1876                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1877                                           OSD_SCALE_W, OSD_SCALE_H);
1878            priv->scale.zoom = -1;
1879    #endif
1880    
1881    #ifdef OSD_CROSSHAIR
1882            priv->crosshair.surface =
1883                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1884                                           OSD_CROSSHAIR_W, OSD_CROSSHAIR_H);
1885            priv->crosshair.rendered = FALSE;
1886    #endif
1887    
1888    #ifdef OSD_COORDINATES
1889            priv->coordinates.surface =
1890                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1891                                           OSD_COORDINATES_W, OSD_COORDINATES_H);
1892    
1893            priv->coordinates.lat = priv->coordinates.lon = OSM_GPS_MAP_INVALID;
1894    #endif
1895    
1896          /* ... and render it */          /* ... and render it */
1897          osm_gps_map_osd_render(osd);          osd_render(osd);
1898      }      }
1899    
1900      // now draw this onto the original context      // now draw this onto the original context
1901      cairo_t *cr = gdk_cairo_create(osd->pixmap);      cairo_t *cr = gdk_cairo_create(drawable);
1902      cairo_set_source_surface(cr, priv->overlay, x, y);  
1903        gint x, y;
1904    
1905    #ifdef OSD_SCALE
1906        x =  OSD_X;
1907        y = -OSD_Y;
1908        if(x < 0) x += osd->widget->allocation.width - OSD_SCALE_W;
1909        if(y < 0) y += osd->widget->allocation.height - OSD_SCALE_H;
1910    
1911        cairo_set_source_surface(cr, priv->scale.surface, x, y);
1912      cairo_paint(cr);      cairo_paint(cr);
1913      cairo_destroy(cr);  #endif
 }  
1914    
1915  static void  #ifdef OSD_CROSSHAIR
1916  osm_gps_map_osd_restore (osm_gps_map_osd_t *osd)      x = (osd->widget->allocation.width - OSD_CROSSHAIR_W)/2;
1917  {      y = (osd->widget->allocation.height - OSD_CROSSHAIR_H)/2;
1918      osd_priv_t *priv = (osd_priv_t*)osd->priv;  
1919        cairo_set_source_surface(cr, priv->crosshair.surface, x, y);
1920        cairo_paint(cr);
1921    #endif
1922    
1923    #ifdef OSD_NAV
1924        if(priv->nav.surface) {
1925            x =  OSD_X;
1926            if(x < 0) x += osd->widget->allocation.width - OSD_NAV_W;
1927            y = (osd->widget->allocation.height - OSD_NAV_H)/2;
1928    
1929            cairo_set_source_surface(cr, priv->nav.surface, x, y);
1930            cairo_paint(cr);
1931        }
1932    #endif
1933    
1934    #ifdef OSD_COORDINATES
1935        x = -OSD_X;
1936        y = -OSD_Y;
1937        if(x < 0) x += osd->widget->allocation.width - OSD_COORDINATES_W;
1938        if(y < 0) y += osd->widget->allocation.height - OSD_COORDINATES_H;
1939    
1940        cairo_set_source_surface(cr, priv->coordinates.surface, x, y);
1941        cairo_paint(cr);
1942    #endif
1943    
1944    #ifdef OSD_BALLOON
1945        if(priv->balloon.surface) {
1946    
1947            /* convert given lat lon into screen coordinates */
1948            gint x, y;
1949            osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget),
1950                                          priv->balloon.lat, priv->balloon.lon,
1951                                          &x, &y);
1952    
1953            /* check if balloon needs to be rerendered */
1954            osd_render_balloon(osd);
1955    
1956            cairo_set_source_surface(cr, priv->balloon.surface,
1957                                     x + priv->balloon.offset_x,
1958                                     y + priv->balloon.offset_y);
1959            cairo_paint(cr);
1960        }
1961    #endif
1962    
1963        x = OSD_X;
1964        if(x < 0)
1965            x += osd->widget->allocation.width - OSD_W;
1966    
1967        y = OSD_Y;
1968        if(y < 0)
1969            y += osd->widget->allocation.height - OSD_H;
1970    
1971        cairo_set_source_surface(cr, priv->controls.surface, x, y);
1972        cairo_paint(cr);
1973    
1974      /* restore backup of previous contents */  #ifdef OSD_SOURCE_SEL
1975      if(priv->backup) {      if(!priv->source_sel.handler_id) {
1976          /* create backup of background */          /* the OSD source selection is not being animated */
1977          gdk_draw_drawable(osd->pixmap,          if(!priv->source_sel.expanded)
1978                            osd->widget->style->fg_gc[GTK_WIDGET_STATE(osd->widget)],              x = osd->widget->allocation.width - OSD_S_W;
1979                            priv->backup, 0, 0,          else
1980                            priv->backup_x, priv->backup_y, OSD_W+2, OSD_H+2);              x = osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
1981        } else
1982            x = priv->source_sel.shift;
1983    
1984        y = OSD_S_Y;
1985        if(OSD_S_Y < 0) {
1986            if(!priv->source_sel.expanded)
1987                y = osd->widget->allocation.height - OSD_S_H + OSD_S_Y;
1988            else
1989                y = osd->widget->allocation.height - OSD_S_EXP_H + OSD_S_Y;
1990      }      }
1991    
1992        cairo_set_source_surface(cr, priv->source_sel.surface, x, y);
1993        cairo_paint(cr);
1994    #endif
1995    
1996        cairo_destroy(cr);
1997        FOUT;
1998  }  }
1999    
2000  static void  static void
2001  osm_gps_map_osd_free(osm_gps_map_osd_t *osd)  osd_free(osm_gps_map_osd_t *osd)
2002  {  {
2003        FIN;
2004      osd_priv_t *priv = (osd_priv_t *)(osd->priv);      osd_priv_t *priv = (osd_priv_t *)(osd->priv);
2005    
2006      if (priv->backup)      if (priv->controls.surface)
2007          g_object_unref(priv->backup);           cairo_surface_destroy(priv->controls.surface);
2008    
2009    #ifdef OSD_SOURCE_SEL
2010        if(priv->source_sel.handler_id)
2011            gtk_timeout_remove(priv->source_sel.handler_id);
2012    
2013        if (priv->source_sel.surface)
2014             cairo_surface_destroy(priv->source_sel.surface);
2015    #endif
2016    
2017    #ifdef OSD_SCALE
2018        if (priv->scale.surface)
2019             cairo_surface_destroy(priv->scale.surface);
2020    #endif
2021    
2022    #ifdef OSD_CROSSHAIR
2023        if (priv->crosshair.surface)
2024             cairo_surface_destroy(priv->crosshair.surface);
2025    #endif
2026    
2027    #ifdef OSD_NAV
2028        if (priv->nav.surface)
2029             cairo_surface_destroy(priv->nav.surface);
2030    #endif
2031    
2032      if (priv->overlay)  #ifdef OSD_COORDINATES
2033           cairo_surface_destroy(priv->overlay);      if (priv->coordinates.surface)
2034             cairo_surface_destroy(priv->coordinates.surface);
2035    #endif
2036    
2037    #ifdef OSD_BALLOON
2038        if (priv->balloon.surface)
2039             cairo_surface_destroy(priv->balloon.surface);
2040    #endif
2041    
2042      g_free(priv);      g_free(priv);
2043        FOUT;
2044    }
2045    
2046    static gboolean
2047    osd_busy(osm_gps_map_osd_t *osd)
2048    {
2049        FIN;
2050    #ifdef OSD_SOURCE_SEL
2051        osd_priv_t *priv = (osd_priv_t *)(osd->priv);
2052        return (priv->source_sel.handler_id != 0);
2053    #else
2054        return FALSE;
2055    #endif
2056    }
2057    
2058    static osd_button_t
2059    osd_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y) {
2060        FIN;
2061        return osd_check_int(osd, TRUE, down, x, y);
2062  }  }
2063    
2064  static osm_gps_map_osd_t osd_classic = {  static osm_gps_map_osd_t osd_classic = {
2065      .restore    = osm_gps_map_osd_restore,      .widget     = NULL,
2066      .draw       = osm_gps_map_osd_draw,  
2067      .check      = osm_gps_map_osd_check,      .draw       = osd_draw,
2068      .render     = osm_gps_map_osd_render,      .check      = osd_check,
2069      .free       = osm_gps_map_osd_free,      .render     = osd_render,
2070        .free       = osd_free,
2071        .busy       = osd_busy,
2072    
2073      .cb         = NULL,      .cb         = NULL,
2074      .data       = NULL,      .data       = NULL,
# Line 397  static osm_gps_map_osd_t osd_classic = { Line 2080  static osm_gps_map_osd_t osd_classic = {
2080  void  void
2081  osm_gps_map_osd_classic_init(OsmGpsMap *map)  osm_gps_map_osd_classic_init(OsmGpsMap *map)
2082  {  {
2083        FIN;
2084      osd_priv_t *priv = osd_classic.priv = g_new0(osd_priv_t, 1);      osd_priv_t *priv = osd_classic.priv = g_new0(osd_priv_t, 1);
2085    
2086    #ifdef OSD_BALLOON
2087        priv->balloon.lat = OSM_GPS_MAP_INVALID;
2088        priv->balloon.lon = OSM_GPS_MAP_INVALID;
2089    #endif
2090    
2091      osd_classic.priv = priv;      osd_classic.priv = priv;
2092    
2093      osm_gps_map_register_osd(map, &osd_classic);      osm_gps_map_register_osd(map, &osd_classic);
2094        FOUT;
2095  }  }
2096    
2097    #ifdef OSD_GPS_BUTTON
2098  void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb, gpointer data) {  /* below are osd specific functions which aren't used by osm-gps-map */
2099    /* but instead are to be used by the main application */
2100    void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb,
2101                                     gpointer data) {
2102        FIN;
2103      osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);      osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
   
2104      g_return_if_fail (osd);      g_return_if_fail (osd);
2105    
2106      osd->cb = cb;      osd->cb = cb;
# Line 418  void osm_gps_map_osd_enable_gps (OsmGpsM Line 2111  void osm_gps_map_osd_enable_gps (OsmGpsM
2111      osd->render(osd);      osd->render(osd);
2112    
2113      osm_gps_map_redraw(map);      osm_gps_map_redraw(map);
2114        FOUT;
2115    }
2116    #endif
2117    
2118    osd_button_t
2119    osm_gps_map_osd_check(OsmGpsMap *map, gint x, gint y) {
2120        FIN;
2121        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
2122        g_return_val_if_fail (osd, OSD_NONE);
2123    
2124        return osd_check_int(osd, FALSE, TRUE, x, y);
2125  }  }
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  Added in v.152