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 226 by harbaum, Wed Dec 2 20:05:52 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, mode;    // display distance imperial/metric
86            int click_sep;
87        } nav;
88    #endif
89    
90    #ifdef OSD_COORDINATES
91        struct {
92            cairo_surface_t *surface;
93            float lat, lon;
94        } coordinates;
95    #endif
96    
97    #ifdef OSD_SOURCE_SEL
98        struct {
99            /* values to handle the "source" menu */
100            cairo_surface_t *surface;
101            gboolean expanded;
102            gint shift, dir, count;
103            gint handler_id;
104            gint width, height;
105            gboolean rendered;
106        } source_sel;
107    #endif
108    
109  } osd_priv_t;  } osd_priv_t;
110    
111    #ifdef OSD_BALLOON
112    /* most visual effects are hardcoded by now, but may be made */
113    /* available via properties later */
114    #ifndef BALLOON_AREA_WIDTH
115    #define BALLOON_AREA_WIDTH           290
116    #endif
117    #ifndef BALLOON_AREA_HEIGHT
118    #define BALLOON_AREA_HEIGHT           75
119    #endif
120    #ifndef BALLOON_CORNER_RADIUS
121    #define BALLOON_CORNER_RADIUS         10
122    #endif
123    
124    #define BALLOON_BORDER               (BALLOON_CORNER_RADIUS/2)
125    #define BALLOON_WIDTH                (BALLOON_AREA_WIDTH + 2 * BALLOON_BORDER)
126    #define BALLOON_HEIGHT               (BALLOON_AREA_HEIGHT + 2 * BALLOON_BORDER)
127    #define BALLOON_TRANSPARENCY         0.8
128    #define POINTER_HEIGHT                20
129    #define POINTER_FOOT_WIDTH            20
130    #define POINTER_OFFSET               (BALLOON_CORNER_RADIUS*3/4)
131    #define BALLOON_SHADOW               (BALLOON_CORNER_RADIUS/2)
132    #define BALLOON_SHADOW_TRANSPARENCY  0.2
133    
134    #define BALLOON_W  (BALLOON_WIDTH + BALLOON_SHADOW)
135    #define BALLOON_H  (BALLOON_HEIGHT + POINTER_HEIGHT + BALLOON_SHADOW)
136    
137    #define CLOSE_BUTTON_RADIUS   (BALLOON_CORNER_RADIUS)
138    
139    #if 0
140    #define FIN   printf("entering function %s\n", __func__);
141    #define FOUT  printf("leaving function %s\n", __func__);
142    #else
143    #define FIN   ;
144    #define FOUT  ;
145    #endif
146    
147    /* draw the bubble shape. this is used twice, once for the shape and once */
148    /* for the shadow */
149    static void
150    osm_gps_map_draw_balloon_shape (cairo_t *cr, int x0, int y0, int x1, int y1,
151           gboolean bottom, int px, int py, int px0, int px1) {
152    
153        FIN;
154    
155        cairo_move_to (cr, x0, y0 + BALLOON_CORNER_RADIUS);
156        cairo_arc (cr, x0 + BALLOON_CORNER_RADIUS, y0 + BALLOON_CORNER_RADIUS,
157                   BALLOON_CORNER_RADIUS, -M_PI, -M_PI/2);
158        if(!bottom) {
159            /* insert top pointer */
160            cairo_line_to (cr, px1, y0);
161            cairo_line_to (cr, px, py);
162            cairo_line_to (cr, px0, y0);
163        }
164    
165        cairo_line_to (cr, x1 - BALLOON_CORNER_RADIUS, y0);
166        cairo_arc (cr, x1 - BALLOON_CORNER_RADIUS, y0 + BALLOON_CORNER_RADIUS,
167                   BALLOON_CORNER_RADIUS, -M_PI/2, 0);
168        cairo_line_to (cr, x1 , y1 - BALLOON_CORNER_RADIUS);
169        cairo_arc (cr, x1 - BALLOON_CORNER_RADIUS, y1 - BALLOON_CORNER_RADIUS,
170                   BALLOON_CORNER_RADIUS, 0, M_PI/2);
171        if(bottom) {
172            /* insert bottom pointer */
173            cairo_line_to (cr, px0, y1);
174            cairo_line_to (cr, px, py);
175            cairo_line_to (cr, px1, y1);
176        }
177    
178        cairo_line_to (cr, x0 + BALLOON_CORNER_RADIUS, y1);
179        cairo_arc (cr, x0 + BALLOON_CORNER_RADIUS, y1 - BALLOON_CORNER_RADIUS,
180                   BALLOON_CORNER_RADIUS, M_PI/2, M_PI);
181    
182        cairo_close_path (cr);
183    
184        FOUT;
185    }
186    
187    static void
188    osd_render_balloon(osm_gps_map_osd_t *osd) {
189        FIN;
190    
191        osd_priv_t *priv = (osd_priv_t*)osd->priv;
192    
193        if(!priv->balloon.surface)
194            return;
195    
196        /* get zoom */
197        gint zoom;
198        g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);
199    
200        /* ------- convert given coordinate into screen position --------- */
201        gint xs, ys;
202        osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget),
203                                          priv->balloon.lat, priv->balloon.lon,
204                                          &xs, &ys);
205    
206        gint x0 = 1, y0 = 1;
207    
208        /* check position of this relative to screen center to determine */
209        /* pointer direction ... */
210        int pointer_x, pointer_x0, pointer_x1;
211        int pointer_y;
212    
213        /* ... and calculate position */
214        int orientation = 0;
215        if(xs > osd->widget->allocation.width/2) {
216            priv->balloon.offset_x = -BALLOON_WIDTH + POINTER_OFFSET;
217            pointer_x = x0 - priv->balloon.offset_x;
218            pointer_x0 = pointer_x - (BALLOON_CORNER_RADIUS - POINTER_OFFSET);
219            pointer_x1 = pointer_x0 - POINTER_FOOT_WIDTH;
220            orientation |= 1;
221        } else {
222            priv->balloon.offset_x = -POINTER_OFFSET;
223            pointer_x = x0 - priv->balloon.offset_x;
224            pointer_x1 = pointer_x + (BALLOON_CORNER_RADIUS - POINTER_OFFSET);
225            pointer_x0 = pointer_x1 + POINTER_FOOT_WIDTH;
226        }
227    
228        gboolean bottom = FALSE;
229        if(ys > osd->widget->allocation.height/2) {
230            priv->balloon.offset_y = -BALLOON_HEIGHT - POINTER_HEIGHT;
231            pointer_y = y0 - priv->balloon.offset_y;
232            bottom = TRUE;
233            orientation |= 2;
234        } else {
235            priv->balloon.offset_y = 0;
236            pointer_y = y0 - priv->balloon.offset_y;
237            y0 += POINTER_HEIGHT;
238        }
239    
240        /* if required orientation equals current one, then don't render */
241        /* anything */
242        if(orientation == priv->balloon.orientation)
243            return;
244    
245        priv->balloon.orientation = orientation;
246    
247        /* calculate bottom/right of box */
248        int x1 = x0 + BALLOON_WIDTH, y1 = y0 + BALLOON_HEIGHT;
249    
250        /* save balloon screen coordinates for later use */
251        priv->balloon.rect.x = x0 + BALLOON_BORDER;
252        priv->balloon.rect.y = y0 + BALLOON_BORDER;
253        priv->balloon.rect.w = x1 - x0 - 2*BALLOON_BORDER;
254        priv->balloon.rect.h = y1 - y0 - 2*BALLOON_BORDER;
255    
256        g_assert(priv->balloon.surface);
257        cairo_t *cr = cairo_create(priv->balloon.surface);
258        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
259        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
260        cairo_paint(cr);
261        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
262    
263        /* --------- draw shadow --------------- */
264        osm_gps_map_draw_balloon_shape (cr,
265                     x0 + BALLOON_SHADOW, y0 + BALLOON_SHADOW,
266                     x1 + BALLOON_SHADOW, y1 + BALLOON_SHADOW,
267                     bottom, pointer_x, pointer_y,
268                     pointer_x0 + BALLOON_SHADOW, pointer_x1 + BALLOON_SHADOW);
269    
270        cairo_set_source_rgba (cr, 0, 0, 0, BALLOON_SHADOW_TRANSPARENCY);
271        cairo_fill_preserve (cr);
272        cairo_set_source_rgba (cr, 1, 0, 0, 1.0);
273        cairo_set_line_width (cr, 0);
274        cairo_stroke (cr);
275    
276        /* --------- draw main shape ----------- */
277        osm_gps_map_draw_balloon_shape (cr, x0, y0, x1, y1,
278                     bottom, pointer_x, pointer_y, pointer_x0, pointer_x1);
279    
280        cairo_set_source_rgba (cr, 1, 1, 1, BALLOON_TRANSPARENCY);
281        cairo_fill_preserve (cr);
282        cairo_set_source_rgba (cr, 0, 0, 0, BALLOON_TRANSPARENCY);
283        cairo_set_line_width (cr, 1);
284        cairo_stroke (cr);
285    
286        if (priv->balloon.cb) {
287            osm_gps_map_balloon_event_t event;
288    
289            /* clip in case application tries to draw in */
290                /* exceed of the balloon */
291            cairo_rectangle (cr, priv->balloon.rect.x, priv->balloon.rect.y,
292                             priv->balloon.rect.w, priv->balloon.rect.h);
293            cairo_clip (cr);
294            cairo_new_path (cr);  /* current path is not consumed by cairo_clip */
295    
296            /* request the application to draw the balloon contents */
297            event.type = OSM_GPS_MAP_BALLOON_EVENT_TYPE_DRAW;
298            event.data.draw.rect = &priv->balloon.rect;
299            event.data.draw.cr = cr;
300    
301            priv->balloon.cb(&event, priv->balloon.data);
302        }
303    
304        cairo_destroy(cr);
305    
306        FOUT;
307    }
308    
309    /* return true if balloon is being displayed and if */
310    /* the given coordinate is within this balloon */
311    static gboolean
312    osd_balloon_check(osm_gps_map_osd_t *osd, gboolean click, gboolean down, gint x, gint y)
313    {
314        FIN;
315    
316        osd_priv_t *priv = (osd_priv_t*)osd->priv;
317    
318        if(!priv->balloon.surface)
319            return FALSE;
320    
321        gint xs, ys;
322        osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget),
323                                          priv->balloon.lat, priv->balloon.lon,
324                                          &xs, &ys);
325    
326        xs += priv->balloon.rect.x + priv->balloon.offset_x;
327        ys += priv->balloon.rect.y + priv->balloon.offset_y;
328    
329        gboolean is_in =
330            (x > xs) && (x < xs + priv->balloon.rect.w) &&
331            (y > ys) && (y < ys + priv->balloon.rect.h);
332    
333        /* is this a real click or is the application just checking for something? */
334        if(click) {
335    
336            /* handle the fact that the balloon may have been created by the */
337            /* button down event */
338            if(!is_in && !down && !priv->balloon.just_created) {
339                /* the user actually clicked outside the balloon */
340    
341                /* close the balloon! */
342                osm_gps_map_osd_clear_balloon (OSM_GPS_MAP(osd->widget));
343    
344                /* and inform application about this */
345                if(priv->balloon.cb) {
346                    osm_gps_map_balloon_event_t event;
347                    event.type = OSM_GPS_MAP_BALLOON_EVENT_TYPE_REMOVED;
348                    priv->balloon.cb(&event, priv->balloon.data);
349                }
350    
351            }
352    
353            if(is_in && priv->balloon.cb) {
354                osm_gps_map_balloon_event_t event;
355    
356                /* notify application of click */
357                event.type = OSM_GPS_MAP_BALLOON_EVENT_TYPE_CLICK;
358                event.data.click.x = x - xs;
359                event.data.click.y = y - ys;
360                event.data.click.down = down;
361    
362                priv->balloon.cb(&event, priv->balloon.data);
363            }
364        }
365        FOUT;
366        return is_in;
367    }
368    
369    void osm_gps_map_osd_clear_balloon (OsmGpsMap *map) {
370        FIN;
371    
372        g_return_if_fail (OSM_IS_GPS_MAP (map));
373    
374        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
375        g_return_if_fail (osd);
376    
377        osd_priv_t *priv = (osd_priv_t*)osd->priv;
378        g_return_if_fail (priv);
379    
380        if(priv->balloon.surface) {
381            cairo_surface_destroy(priv->balloon.surface);
382            priv->balloon.surface = NULL;
383            priv->balloon.lat = OSM_GPS_MAP_INVALID;
384            priv->balloon.lon = OSM_GPS_MAP_INVALID;
385        }
386        osm_gps_map_redraw(map);
387        FOUT;
388    }
389    
390    void
391    osm_gps_map_osd_draw_balloon (OsmGpsMap *map, float latitude, float longitude,
392                                  OsmGpsMapBalloonCallback cb, gpointer data) {
393        FIN;
394        g_return_if_fail (OSM_IS_GPS_MAP (map));
395    
396        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
397        g_return_if_fail (osd);
398    
399        osd_priv_t *priv = (osd_priv_t*)osd->priv;
400        g_return_if_fail (priv);
401    
402        osm_gps_map_osd_clear_balloon (map);
403    
404        /* allocate balloon surface */
405        priv->balloon.surface =
406            cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
407                                       BALLOON_W+2, BALLOON_H+2);
408    
409        priv->balloon.lat = latitude;
410        priv->balloon.lon = longitude;
411        priv->balloon.cb = cb;
412        priv->balloon.data = data;
413        priv->balloon.just_created = TRUE;
414    
415        priv->balloon.orientation = -1;
416    
417        osd_render_balloon(osd);
418    
419        osm_gps_map_redraw(map);
420        FOUT;
421    }
422    
423    #endif // OSD_BALLOON
424    
425  /* position and extent of bounding box */  /* position and extent of bounding box */
426    #ifndef OSD_X
427  #define OSD_X      (10)  #define OSD_X      (10)
428  #define OSD_Y      (10)  #endif
429    
430  #define OSD_COLOR            0.5, 0.5, 1  #ifndef OSD_Y
431  #define OSD_COLOR_DISABLED   0.8, 0.8, 0.8  #define OSD_Y      (10)
432    #endif
433    
434  /* parameters of the direction shape */  /* parameters of the direction shape */
435  #ifndef OSM_GPS_MAP_OSD_DIAMETER  #ifndef OSD_DIAMETER
436  #define D_RAD  (30)         // diameter of dpad  #define D_RAD  (30)         // diameter of dpad
437  #else  #else
438  #define D_RAD  (OSM_GPS_MAP_OSD_DIAMETER)  #define D_RAD  (OSD_DIAMETER)
439  #endif  #endif
440  #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
441  #define D_LEN  (D_RAD/4)    // length of arrow  #define D_LEN  (D_RAD/4)    // length of arrow
# Line 61  typedef struct { Line 445  typedef struct {
445  #define Z_STEP   (D_RAD/4)  // distance between dpad and zoom  #define Z_STEP   (D_RAD/4)  // distance between dpad and zoom
446  #define Z_RAD    (D_RAD/2)  // radius of "caps" of zoom bar  #define Z_RAD    (D_RAD/2)  // radius of "caps" of zoom bar
447    
448    #ifdef OSD_SHADOW_ENABLE
449  /* shadow also depends on control size */  /* shadow also depends on control size */
450  #define OSD_SHADOW (D_RAD/6)  #define OSD_SHADOW (D_RAD/6)
451    #else
452    #define OSD_SHADOW (0)
453    #endif
454    
455    /* normally the GPS button is in the center of the dpad. if there's */
456    /* no dpad it will go into the zoom area */
457    #if defined(OSD_GPS_BUTTON) && defined(OSD_NO_DPAD)
458    #define Z_GPS  1
459    #else
460    #define Z_GPS  0
461    #endif
462    
463  /* total width and height of controls incl. shadow */  /* total width and height of controls incl. shadow */
464  #define OSD_W    (2*D_RAD + OSD_SHADOW)  #define OSD_W    (2*D_RAD + OSD_SHADOW + Z_GPS * 2 * Z_RAD)
465    #if !Z_GPS
466  #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)
467    #else
468    #define OSD_H    (2*Z_RAD + OSD_SHADOW)
469    #endif
470    
471    #ifdef OSD_SHADOW_ENABLE
472  #define OSD_LBL_SHADOW (OSD_SHADOW/2)  #define OSD_LBL_SHADOW (OSD_SHADOW/2)
473    #endif
474    
475    #define Z_TOP    ((1-Z_GPS) * (2 * D_RAD + Z_STEP))
476    
 #define Z_TOP    (2 * D_RAD + Z_STEP)  
477  #define Z_MID    (Z_TOP + Z_RAD)  #define Z_MID    (Z_TOP + Z_RAD)
478  #define Z_BOT    (Z_MID + Z_RAD)  #define Z_BOT    (Z_MID + Z_RAD)
479  #define Z_LEFT   (Z_RAD)  #define Z_LEFT   (Z_RAD)
480  #define Z_RIGHT  (2 * D_RAD - Z_RAD)  #define Z_RIGHT  (2 * D_RAD - Z_RAD + Z_GPS * 2 * Z_RAD)
481    #define Z_CENTER ((Z_RIGHT + Z_LEFT)/2)
482    
483  /* create the cairo shape used for the zoom buttons */  /* create the cairo shape used for the zoom buttons */
484  static void  static void
485  osm_gps_map_osd_zoom_shape(cairo_t *cr, gint x, gint y)  osd_zoom_shape(cairo_t *cr, gint x, gint y)
486  {  {
487      cairo_move_to (cr, x+Z_LEFT,    y+Z_TOP);      cairo_move_to (cr, x+Z_LEFT,    y+Z_TOP);
488      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 491  osm_gps_map_osd_zoom_shape(cairo_t *cr,
491      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);
492  }  }
493    
494    /* ------------------- color/shadow functions ----------------- */
495    
496    #ifndef OSD_COLOR
497    /* if no color has been specified we just use the gdks default colors */
498    static void
499    osd_labels(cairo_t *cr, gint width, gboolean enabled,
500                           GdkColor *fg, GdkColor *disabled) {
501        if(enabled)  gdk_cairo_set_source_color(cr, fg);
502        else         gdk_cairo_set_source_color(cr, disabled);
503        cairo_set_line_width (cr, width);
504    }
505    #else
506    static void
507    osd_labels(cairo_t *cr, gint width, gboolean enabled) {
508        if(enabled)  cairo_set_source_rgb (cr, OSD_COLOR);
509        else         cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);
510        cairo_set_line_width (cr, width);
511    }
512    #endif
513    
514    #ifdef OSD_SHADOW_ENABLE
515    static void
516    osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {
517        cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);
518        cairo_set_line_width (cr, width);
519    }
520    #endif
521    
522    #ifndef OSD_NO_DPAD
523  /* create the cairo shape used for the dpad */  /* create the cairo shape used for the dpad */
524  static void  static void
525  osm_gps_map_osd_dpad_shape(cairo_t *cr, gint x, gint y)  osd_dpad_shape(cairo_t *cr, gint x, gint y)
526  {  {
527      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);
528  }  }
529    #endif
530    
531    #ifdef OSD_SHADOW_ENABLE
532    static void
533    osd_shape_shadow(cairo_t *cr) {
534        cairo_set_source_rgba (cr, 0, 0, 0, 0.2);
535        cairo_fill (cr);
536        cairo_stroke (cr);
537    }
538    #endif
539    
540    #ifndef OSD_COLOR
541    /* if no color has been specified we just use the gdks default colors */
542    static void
543    osd_shape(cairo_t *cr, GdkColor *bg, GdkColor *fg) {
544        gdk_cairo_set_source_color(cr, bg);
545        cairo_fill_preserve (cr);
546        gdk_cairo_set_source_color(cr, fg);
547        cairo_set_line_width (cr, 1);
548        cairo_stroke (cr);
549    }
550    #else
551    static void
552    osd_shape(cairo_t *cr) {
553        cairo_set_source_rgb (cr, OSD_COLOR_BG);
554        cairo_fill_preserve (cr);
555        cairo_set_source_rgb (cr, OSD_COLOR);
556        cairo_set_line_width (cr, 1);
557        cairo_stroke (cr);
558    }
559    #endif
560    
561    
562  static gboolean  static gboolean
563  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)
564  {  {
565        FIN;
566      return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);      return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);
567  }  }
568    
569    #ifndef OSD_NO_DPAD
570  /* check whether x/y is within the dpad */  /* check whether x/y is within the dpad */
571  static osd_button_t  static osd_button_t
572  osm_gps_map_osd_check_dpad(gint x, gint y)  osd_check_dpad(gint x, gint y)
573  {  {
574      /* within entire dpad circle */      /* within entire dpad circle */
575      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))
576      {      {
577          /* convert into position relative to dpads centre */          /* convert into position relative to dpads centre */
578          x -= (OSD_X + D_RAD);          x -= D_RAD;
579          y -= (OSD_Y + D_RAD);          y -= D_RAD;
580    
581    #ifdef OSD_GPS_BUTTON
582          /* check for dpad center goes here! */          /* check for dpad center goes here! */
583          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))
584              return OSD_GPS;              return OSD_GPS;
585    #endif
586    
587          if( y < 0 && abs(x) < abs(y))          if( y < 0 && abs(x) < abs(y))
588              return OSD_UP;              return OSD_UP;
# Line 132  osm_gps_map_osd_check_dpad(gint x, gint Line 600  osm_gps_map_osd_check_dpad(gint x, gint
600      }      }
601      return OSD_NONE;      return OSD_NONE;
602  }  }
603    #endif
604    
605  /* check whether x/y is within the zoom pads */  /* check whether x/y is within the zoom pads */
606  static osd_button_t  static osd_button_t
607  osm_gps_map_osd_check_zoom(gint x, gint y) {  osd_check_zoom(gint x, gint y) {
608      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) {
609    
610          /* within circle around (-) label */          /* within circle around (-) label */
611          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)  
612              return OSD_OUT;              return OSD_OUT;
613    
614          /* within circle around (+) label */          /* within circle around (+) label */
615          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))
616              return OSD_IN;              return OSD_IN;
617    
618    #if Z_GPS == 1
619            /* within square around center */
620            if( x > Z_CENTER - Z_RAD && x < Z_CENTER + Z_RAD)
621                return OSD_GPS;
622    #endif
623    
624            /* between center of (-) button and center of entire zoom control area */
625            if(x > OSD_LEFT && x < D_RAD)
626                return OSD_OUT;
627    
628          /* between center of (+) button and center of entire zoom control area */          /* between center of (+) button and center of entire zoom control area */
629          if(x < OSD_RIGHT && x > OSD_X + D_RAD)          if(x < OSD_RIGHT && x > D_RAD)
630              return OSD_IN;              return OSD_IN;
631      }      }
632    
633      return OSD_NONE;      return OSD_NONE;
634  }  }
635    
636  static osd_button_t  #ifdef OSD_SOURCE_SEL
 osm_gps_map_osd_check(gint x, gint y) {  
     osd_button_t but = OSD_NONE;  
637    
638      /* first do a rough test for the OSD area. */  /* place source selection at right border */
639      /* this is just to avoid an unnecessary detailed test */  #define OSD_S_RAD (Z_RAD)
640      if(x > OSD_X && x < OSD_X + OSD_W &&  #define OSD_S_X   (-OSD_X)
641         y > OSD_Y && y < OSD_Y + OSD_H) {  #define OSD_S_Y   (OSD_Y)
642          but = osm_gps_map_osd_check_dpad(x, y);  #define OSD_S_PW  (2 * Z_RAD)
643    #define OSD_S_W   (OSD_S_PW)
644    #define OSD_S_PH  (2 * Z_RAD)
645    #define OSD_S_H   (OSD_S_PH + OSD_SHADOW)
646    
647    /* size of usable area when expanded */
648    #define OSD_S_AREA_W (priv->source_sel.width)
649    #define OSD_S_AREA_H (priv->source_sel.height)
650    #define OSD_S_EXP_W  (OSD_S_PW + OSD_S_AREA_W + OSD_SHADOW)
651    #define OSD_S_EXP_H  (OSD_S_AREA_H + OSD_SHADOW)
652    
653    /* internal value to draw the arrow on the "puller" */
654    #define OSD_S_D0  (OSD_S_RAD/2)
655    #ifndef OSD_FONT_SIZE
656    #define OSD_FONT_SIZE (16.0)
657    #endif
658    #define OSD_TEXT_BORDER   (OSD_FONT_SIZE/2)
659    #define OSD_TEXT_SKIP     (OSD_FONT_SIZE/8)
660    
661          if(but == OSD_NONE)  /* draw the shape of the source selection OSD, either only the puller (not expanded) */
662              but = osm_gps_map_osd_check_zoom(x, y);  /* or the entire menu incl. the puller (expanded) */
663    static void
664    osd_source_shape(osd_priv_t *priv, cairo_t *cr, gint x, gint y) {
665        if(!priv->source_sel.expanded) {
666            /* just draw the puller */
667            cairo_move_to (cr, x + OSD_S_PW, y + OSD_S_PH);
668            cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
669            cairo_line_to (cr, x + OSD_S_PW, y);
670        } else {
671            /* draw the puller and the area itself */
672            cairo_move_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y + OSD_S_AREA_H);
673            cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H);
674            if(OSD_S_Y > 0) {
675                cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_PH);
676                cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
677            } else {
678                cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_AREA_H-OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
679                cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H - OSD_S_PH);
680                cairo_line_to (cr, x + OSD_S_PW, y);
681            }
682            cairo_line_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y);
683            cairo_close_path (cr);
684      }      }
685    }
686    
687      return but;  static void
688    osd_source_content(osm_gps_map_osd_t *osd, cairo_t *cr, gint offset) {
689        osd_priv_t *priv = (osd_priv_t*)osd->priv;
690    
691        int py = offset + OSD_S_RAD - OSD_S_D0;
692    
693        if(!priv->source_sel.expanded) {
694            /* draw the "puller" open (<) arrow */
695            cairo_move_to (cr, offset + OSD_S_RAD + OSD_S_D0/2, py);
696            cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
697            cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
698        } else {
699            if(OSD_S_Y < 0)
700                py += OSD_S_AREA_H - OSD_S_PH;
701    
702            /* draw the "puller" close (>) arrow */
703            cairo_move_to (cr, offset + OSD_S_RAD - OSD_S_D0/2, py);
704            cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
705            cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
706            cairo_stroke(cr);
707    
708            /* don't draw a shadow for the text content */
709            if(offset == 1) {
710                gint source;
711                g_object_get(osd->widget, "map-source", &source, NULL);
712    
713                cairo_select_font_face (cr, "Sans",
714                                        CAIRO_FONT_SLANT_NORMAL,
715                                        CAIRO_FONT_WEIGHT_BOLD);
716                cairo_set_font_size (cr, OSD_FONT_SIZE);
717    
718                int i, step = (priv->source_sel.height - 2*OSD_TEXT_BORDER) /
719                    OSM_GPS_MAP_SOURCE_LAST;
720                for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
721                    cairo_text_extents_t extents;
722                    const char *src = osm_gps_map_source_get_friendly_name(i);
723                    cairo_text_extents (cr, src, &extents);
724    
725                    int x = offset + OSD_S_PW + OSD_TEXT_BORDER;
726                    int y = offset + step * (i-1) + OSD_TEXT_BORDER;
727    
728                    /* draw filled rectangle if selected */
729                    if(source == i) {
730                        cairo_rectangle(cr, x - OSD_TEXT_BORDER/2,
731                                        y - OSD_TEXT_SKIP,
732                                        priv->source_sel.width - OSD_TEXT_BORDER,
733                                        step + OSD_TEXT_SKIP);
734                        cairo_fill(cr);
735    
736                        /* temprarily draw with background color */
737    #ifndef OSD_COLOR
738                        GdkColor bg = osd->widget->style->bg[GTK_STATE_NORMAL];
739                        gdk_cairo_set_source_color(cr, &bg);
740    #else
741                        cairo_set_source_rgb (cr, OSD_COLOR_BG);
742    #endif
743                    }
744    
745                    cairo_move_to (cr, x, y + OSD_TEXT_SKIP - extents.y_bearing);
746                    cairo_show_text (cr, src);
747    
748                    /* restore color */
749                    if(source == i) {
750    #ifndef OSD_COLOR
751                        GdkColor fg = osd->widget->style->fg[GTK_STATE_NORMAL];
752                        gdk_cairo_set_source_color(cr, &fg);
753    #else
754                        cairo_set_source_rgb (cr, OSD_COLOR);
755    #endif
756                    }
757                }
758            }
759        }
760  }  }
761    
762  static void  static void
763  osm_gps_map_osd_shape_shadow(cairo_t *cr) {  osd_render_source_sel(osm_gps_map_osd_t *osd, gboolean force_rerender) {
764      cairo_set_source_rgba (cr, 0, 0, 0, 0.2);      FIN;
765      cairo_fill (cr);  
766        osd_priv_t *priv = (osd_priv_t*)osd->priv;
767    
768        if(!priv->source_sel.surface ||
769           (priv->source_sel.rendered && !force_rerender))
770            return;
771    
772        priv->source_sel.rendered = TRUE;
773    
774    #ifndef OSD_COLOR
775        GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
776        GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
777        GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
778    #endif
779    
780        /* draw source selector */
781        g_assert(priv->source_sel.surface);
782        cairo_t *cr = cairo_create(priv->source_sel.surface);
783        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
784        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
785        cairo_paint(cr);
786        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
787    
788    #ifdef OSD_SHADOW_ENABLE
789        osd_source_shape(priv, cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
790        osd_shape_shadow(cr);
791    #endif
792    
793        osd_source_shape(priv, cr, 1, 1);
794    #ifndef OSD_COLOR
795        osd_shape(cr, &bg, &fg);
796    #else
797        osd_shape(cr);
798    #endif
799    
800    #ifdef OSD_SHADOW_ENABLE
801        osd_labels_shadow(cr, Z_RAD/3, TRUE);
802        osd_source_content(osd, cr, 1+OSD_LBL_SHADOW);
803        cairo_stroke (cr);
804    #endif
805    #ifndef OSD_COLOR
806        osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
807    #else
808        osd_labels(cr, Z_RAD/3, TRUE);
809    #endif
810        osd_source_content(osd, cr, 1);
811      cairo_stroke (cr);      cairo_stroke (cr);
812    
813        cairo_destroy(cr);
814        FOUT;
815  }  }
816    
817  static void  /* re-allocate the buffer used to draw the menu. This is used */
818  osm_gps_map_osd_shape(cairo_t *cr) {  /* to collapse/expand the buffer */
819      cairo_set_source_rgb (cr, 1, 1, 1);  static void
820      cairo_fill_preserve (cr);  osd_source_reallocate(osm_gps_map_osd_t *osd) {
821      cairo_set_source_rgb (cr, OSD_COLOR);      FIN;
822      cairo_set_line_width (cr, 1);      osd_priv_t *priv = (osd_priv_t*)osd->priv;
823      cairo_stroke (cr);  
824        /* re-allocate offscreen bitmap */
825        g_assert (priv->source_sel.surface);
826    
827        int w = OSD_S_W, h = OSD_S_H;
828        if(priv->source_sel.expanded) {
829            cairo_text_extents_t extents;
830    
831            /* determine content size */
832            g_assert(priv->source_sel.surface);
833            cairo_t *cr = cairo_create(priv->source_sel.surface);
834            cairo_select_font_face (cr, "Sans",
835                                    CAIRO_FONT_SLANT_NORMAL,
836                                    CAIRO_FONT_WEIGHT_BOLD);
837            cairo_set_font_size (cr, OSD_FONT_SIZE);
838    
839            /* calculate menu size */
840            int i, max_h = 0, max_w = 0;
841            for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
842                const char *src = osm_gps_map_source_get_friendly_name(i);
843                cairo_text_extents (cr, src, &extents);
844    
845                if(extents.width > max_w) max_w = extents.width;
846                if(extents.height > max_h) max_h = extents.height;
847            }
848            cairo_destroy(cr);
849    
850            priv->source_sel.width  = max_w + 2*OSD_TEXT_BORDER;
851            priv->source_sel.height = OSM_GPS_MAP_SOURCE_LAST *
852                (max_h + 2*OSD_TEXT_SKIP) + 2*OSD_TEXT_BORDER;
853    
854            w = OSD_S_EXP_W;
855            h = OSD_S_EXP_H;
856        }
857    
858        cairo_surface_destroy(priv->source_sel.surface);
859        priv->source_sel.surface =
860            cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w+2, h+2);
861    
862        osd_render_source_sel(osd, TRUE);
863        FOUT;
864    }
865    
866    #define OSD_HZ      15
867    #define OSD_TIME    500
868    
869    static gboolean osd_source_animate(gpointer data) {
870        FIN;
871        osm_gps_map_osd_t *osd = (osm_gps_map_osd_t*)data;
872        osd_priv_t *priv = (osd_priv_t*)osd->priv;
873        int diff = OSD_S_EXP_W - OSD_S_W - OSD_S_X;
874        gboolean done = FALSE;
875        priv->source_sel.count += priv->source_sel.dir;
876    
877        /* shifting in */
878        if(priv->source_sel.dir < 0) {
879            if(priv->source_sel.count <= 0) {
880                priv->source_sel.count = 0;
881                done = TRUE;
882            }
883        } else {
884            if(priv->source_sel.count >= 1000) {
885                priv->source_sel.expanded = FALSE;
886                osd_source_reallocate(osd);
887    
888                priv->source_sel.count = 1000;
889                done = TRUE;
890            }
891        }
892    
893    
894        /* count runs linearly from 0 to 1000, map this nicely onto a position */
895    
896        /* nice sinoid mapping */
897        float m = 0.5-cos(priv->source_sel.count * M_PI / 1000.0)/2;
898        priv->source_sel.shift =
899            (osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X) +
900            m * diff;
901    
902        /* make sure the screen is updated */
903        osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
904    
905        /* stop animation if done */
906        if(done)
907            priv->source_sel.handler_id = 0;
908    
909        FOUT;
910        return !done;
911    }
912    
913    /* switch between expand and collapse mode of source selection */
914    static void
915    osd_source_toggle(osm_gps_map_osd_t *osd)
916    {
917        FIN;
918        osd_priv_t *priv = (osd_priv_t*)osd->priv;
919    
920        /* ignore clicks while animation is running */
921        if(priv->source_sel.handler_id)
922            return;
923    
924        /* expand immediately, collapse is handle at the end of the */
925        /* collapse animation */
926        if(!priv->source_sel.expanded) {
927            priv->source_sel.expanded = TRUE;
928            osd_source_reallocate(osd);
929    
930            priv->source_sel.count = 1000;
931            priv->source_sel.shift = osd->widget->allocation.width - OSD_S_W;
932            priv->source_sel.dir = -1000/OSD_HZ;
933        } else {
934            priv->source_sel.count =  0;
935            priv->source_sel.shift = osd->widget->allocation.width -
936                OSD_S_EXP_W + OSD_S_X;
937            priv->source_sel.dir = +1000/OSD_HZ;
938        }
939    
940        /* start timer to handle animation */
941        priv->source_sel.handler_id = gtk_timeout_add(OSD_TIME/OSD_HZ,
942                                                      osd_source_animate, osd);
943        FOUT;
944    }
945    
946    /* check if the user clicked inside the source selection area */
947    static osd_button_t
948    osd_source_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y) {
949        FIN;
950        osd_priv_t *priv = (osd_priv_t*)osd->priv;
951    
952        if(!priv->source_sel.expanded)
953            x -= osd->widget->allocation.width - OSD_S_W;
954        else
955            x -= osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
956    
957        if(OSD_S_Y > 0)
958            y -= OSD_S_Y;
959        else
960            y -= osd->widget->allocation.height - OSD_S_PH + OSD_S_Y;
961    
962        /* within square around puller? */
963        if(y > 0 && y < OSD_S_PH && x > 0 && x < OSD_S_PW) {
964            /* really within puller shape? */
965            if(x > Z_RAD || osm_gps_map_in_circle(x, y, Z_RAD, Z_RAD, Z_RAD)) {
966                /* expand source selector */
967                if(down)
968                    osd_source_toggle(osd);
969    
970                /* tell upper layers that user clicked some background element */
971                /* of the OSD */
972                return OSD_BG;
973            }
974        }
975    
976        /* check for clicks into data area */
977        if(priv->source_sel.expanded && !priv->source_sel.handler_id) {
978            /* re-adjust from puller top to content top */
979            if(OSD_S_Y < 0)
980                y += OSD_S_EXP_H - OSD_S_PH;
981    
982            if(x > OSD_S_PW &&
983               x < OSD_S_PW + OSD_S_EXP_W &&
984               y > 0 &&
985               y < OSD_S_EXP_H) {
986    
987                int step = (priv->source_sel.height - 2*OSD_TEXT_BORDER)
988                    / OSM_GPS_MAP_SOURCE_LAST;
989    
990                y -= OSD_TEXT_BORDER - OSD_TEXT_SKIP;
991                y /= step;
992                y += 1;
993    
994                if(down) {
995                    gint old = 0;
996                    g_object_get(osd->widget, "map-source", &old, NULL);
997    
998                    if(y > OSM_GPS_MAP_SOURCE_NULL &&
999                       y <= OSM_GPS_MAP_SOURCE_LAST &&
1000                       old != y) {
1001                        g_object_set(osd->widget, "map-source", y, NULL);
1002    
1003                        osd_render_source_sel(osd, TRUE);
1004                        osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
1005                    }
1006                }
1007    
1008                /* return "clicked in OSD background" to prevent further */
1009                /* processing by application */
1010                return OSD_BG;
1011            }
1012        }
1013    
1014        FOUT;
1015        return OSD_NONE;
1016  }  }
1017    #endif // OSD_SOURCE_SEL
1018    
1019    #ifndef OSD_NO_DPAD
1020  static void  static void
1021  osm_gps_map_osd_dpad_labels(cairo_t *cr, gint x, gint y) {  osd_dpad_labels(cairo_t *cr, gint x, gint y) {
1022      /* move reference to dpad center */      /* move reference to dpad center */
1023      x += D_RAD;      x += D_RAD;
1024      y += D_RAD;      y += D_RAD;
# Line 215  osm_gps_map_osd_dpad_labels(cairo_t *cr, Line 1041  osm_gps_map_osd_dpad_labels(cairo_t *cr,
1041          cairo_rel_line_to (cr, offset[i][2][0], offset[i][2][1]);          cairo_rel_line_to (cr, offset[i][2][0], offset[i][2][1]);
1042      }      }
1043  }  }
1044    #endif
1045    
1046  /* draw the sattelite dish icon in the center of the dpad */  #ifdef OSD_GPS_BUTTON
1047  #define GPS_V0  (D_RAD/8)  /* draw the satellite dish icon in the center of the dpad */
1048    #define GPS_V0  (D_RAD/7)
1049  #define GPS_V1  (D_RAD/10)  #define GPS_V1  (D_RAD/10)
1050  #define GPS_V2  (D_RAD/5)  #define GPS_V2  (D_RAD/5)
1051    
1052  /* draw a satellite receiver dish */  /* draw a satellite receiver dish */
1053    /* this is either drawn in the center of the dpad (if present) */
1054    /* or in the middle of the zoom area */
1055  static void  static void
1056  osm_gps_map_osd_dpad_gps(cairo_t *cr, gint x, gint y) {  osd_dpad_gps(cairo_t *cr, gint x, gint y) {
1057      /* move reference to dpad center */      /* move reference to dpad center */
1058      x += D_RAD;      x += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD * 3;
1059      y += D_RAD + GPS_V0;      y += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD + GPS_V0;
1060    
1061      cairo_move_to (cr, x-GPS_V0, y+GPS_V0);      cairo_move_to (cr, x-GPS_V0, y+GPS_V0);
1062      cairo_rel_line_to (cr, +GPS_V0, -GPS_V0);      cairo_rel_line_to (cr, +GPS_V0, -GPS_V0);
# Line 241  osm_gps_map_osd_dpad_gps(cairo_t *cr, gi Line 1071  osm_gps_map_osd_dpad_gps(cairo_t *cr, gi
1071      cairo_move_to (cr, x, y-GPS_V2);      cairo_move_to (cr, x, y-GPS_V2);
1072      cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);      cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);
1073  }  }
1074    #endif
1075    
1076  #define Z_LEN  (2*Z_RAD/3)  #define Z_LEN  (2*Z_RAD/3)
1077    
1078  static void  static void
1079  osm_gps_map_osd_zoom_labels(cairo_t *cr, gint x, gint y) {  osd_zoom_labels(cairo_t *cr, gint x, gint y) {
1080      cairo_move_to (cr, x + Z_LEFT  - Z_LEN, y + Z_MID);      cairo_move_to (cr, x + Z_LEFT  - Z_LEN, y + Z_MID);
1081      cairo_line_to (cr, x + Z_LEFT  + Z_LEN, y + Z_MID);      cairo_line_to (cr, x + Z_LEFT  + Z_LEN, y + Z_MID);
1082    
# Line 255  osm_gps_map_osd_zoom_labels(cairo_t *cr, Line 1086  osm_gps_map_osd_zoom_labels(cairo_t *cr,
1086      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);
1087  }  }
1088    
1089  static void  #ifdef OSD_COORDINATES
 osm_gps_map_osd_labels(cairo_t *cr, gint width, gboolean enabled) {  
     if(enabled)  cairo_set_source_rgb (cr, OSD_COLOR);  
     else         cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);  
     cairo_set_line_width (cr, width);  
     cairo_stroke (cr);  
 }  
1090    
1091  static void  #ifndef OSD_COORDINATES_FONT_SIZE
1092  osm_gps_map_osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {  #define OSD_COORDINATES_FONT_SIZE (12.0)
1093      cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);  #endif
1094      cairo_set_line_width (cr, width);  
1095    #define OSD_COORDINATES_OFFSET (OSD_COORDINATES_FONT_SIZE/6)
1096    
1097    #define OSD_COORDINATES_W  (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET)
1098    #define OSD_COORDINATES_H  (2*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET+OSD_COORDINATES_FONT_SIZE/4)
1099    
1100    /* these can be overwritten with versions that support */
1101    /* localization */
1102    #ifndef OSD_COORDINATES_CHR_N
1103    #define OSD_COORDINATES_CHR_N  "N"
1104    #endif
1105    #ifndef OSD_COORDINATES_CHR_S
1106    #define OSD_COORDINATES_CHR_S  "S"
1107    #endif
1108    #ifndef OSD_COORDINATES_CHR_E
1109    #define OSD_COORDINATES_CHR_E  "E"
1110    #endif
1111    #ifndef OSD_COORDINATES_CHR_W
1112    #define OSD_COORDINATES_CHR_W  "W"
1113    #endif
1114    
1115    
1116    
1117    /* this is the classic geocaching notation */
1118    static char
1119    *osd_latitude_str(float latitude) {
1120        char *c = OSD_COORDINATES_CHR_N;
1121        float integral, fractional;
1122    
1123        if(isnan(latitude))
1124            return NULL;
1125    
1126        if(latitude < 0) {
1127            latitude = fabs(latitude);
1128            c = OSD_COORDINATES_CHR_S;
1129        }
1130    
1131        fractional = modff(latitude, &integral);
1132    
1133        return g_strdup_printf("%s %02d° %06.3f'",
1134                               c, (int)integral, fractional*60.0);
1135    }
1136    
1137    static char
1138    *osd_longitude_str(float longitude) {
1139        char *c = OSD_COORDINATES_CHR_E;
1140        float integral, fractional;
1141    
1142        if(isnan(longitude))
1143            return NULL;
1144    
1145        if(longitude < 0) {
1146            longitude = fabs(longitude);
1147            c = OSD_COORDINATES_CHR_W;
1148        }
1149    
1150        fractional = modff(longitude, &integral);
1151    
1152        return g_strdup_printf("%s %03d° %06.3f'",
1153                               c, (int)integral, fractional*60.0);
1154    }
1155    
1156    /* render a string at the given screen position */
1157    static int
1158    osd_render_centered_text(cairo_t *cr, int y, int width, char *text) {
1159        FIN;
1160    
1161        if(!text) return y;
1162    
1163        char *p = g_malloc(strlen(text)+4);  // space for "...\n"
1164        strcpy(p, text);
1165    
1166        cairo_text_extents_t extents;
1167        memset(&extents, 0, sizeof(cairo_text_extents_t));
1168        cairo_text_extents (cr, p, &extents);
1169        g_assert(extents.width != 0.0);
1170    
1171        /* check if text needs to be truncated */
1172        int trunc_at = strlen(text);
1173        while(extents.width > width) {
1174    
1175            /* cut off all utf8 multibyte remains so the actual */
1176            /* truncation only deals with one byte */
1177            while((p[trunc_at-1] & 0xc0) == 0x80) {
1178                trunc_at--;
1179                g_assert(trunc_at > 0);
1180            }
1181    
1182            trunc_at--;
1183            g_assert(trunc_at > 0);
1184    
1185            strcpy(p+trunc_at, "...");
1186            cairo_text_extents (cr, p, &extents);
1187        }
1188    
1189        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
1190        cairo_set_line_width (cr, OSD_COORDINATES_FONT_SIZE/6);
1191        cairo_move_to (cr, (width - extents.width)/2, y - extents.y_bearing);
1192        cairo_text_path (cr, p);
1193      cairo_stroke (cr);      cairo_stroke (cr);
1194    
1195        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
1196        cairo_move_to (cr, (width - extents.width)/2, y - extents.y_bearing);
1197        cairo_show_text (cr, p);
1198    
1199        g_free(p);
1200    
1201        /* skip + 1/5 line */
1202        FOUT;
1203        return y + 6*OSD_COORDINATES_FONT_SIZE/5;
1204  }  }
1205    
1206  static void  static void
1207  osm_gps_map_osd_render(osm_gps_map_osd_t *osd) {  osd_render_coordinates(osm_gps_map_osd_t *osd)
1208    {
1209        FIN;
1210      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
1211    
1212        if(!priv->coordinates.surface)
1213            return;
1214    
1215        /* get current map position */
1216        gfloat lat, lon;
1217        g_object_get(osd->widget, "latitude", &lat, "longitude", &lon, NULL);
1218    
1219        /* check if position has changed enough to require redraw */
1220        if(!isnan(priv->coordinates.lat) && !isnan(priv->coordinates.lon))
1221            /* 1/60000 == 1/1000 minute */
1222            if((fabsf(lat - priv->coordinates.lat) < 1/60000) &&
1223               (fabsf(lon - priv->coordinates.lon) < 1/60000))
1224                return;
1225    
1226        priv->coordinates.lat = lat;
1227        priv->coordinates.lon = lon;
1228    
1229      /* first fill with transparency */      /* first fill with transparency */
1230      cairo_t *cr = cairo_create(priv->overlay);  
1231        g_assert(priv->coordinates.surface);
1232        cairo_t *cr = cairo_create(priv->coordinates.surface);
1233        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1234        //    cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 0.5);
1235        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
1236        cairo_paint(cr);
1237        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1238    
1239        cairo_select_font_face (cr, "Sans",
1240                                CAIRO_FONT_SLANT_NORMAL,
1241                                CAIRO_FONT_WEIGHT_BOLD);
1242        cairo_set_font_size (cr, OSD_COORDINATES_FONT_SIZE);
1243    
1244        char *latitude = osd_latitude_str(lat);
1245        char *longitude = osd_longitude_str(lon);
1246    
1247        int y = OSD_COORDINATES_OFFSET;
1248        y = osd_render_centered_text(cr, y, OSD_COORDINATES_W, latitude);
1249        y = osd_render_centered_text(cr, y, OSD_COORDINATES_W, longitude);
1250    
1251        g_free(latitude);
1252        g_free(longitude);
1253    
1254        cairo_destroy(cr);
1255        FOUT;
1256    }
1257    #endif  // OSD_COORDINATES
1258    
1259    #ifdef OSD_NAV
1260    #define OSD_NAV_W  (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET)
1261    #define OSD_NAV_H  (11*OSD_COORDINATES_FONT_SIZE)
1262    
1263    /* http://mathforum.org/library/drmath/view/55417.html */
1264    static float get_bearing(float lat1, float lon1, float lat2, float lon2) {
1265      return atan2( sin(lon2 - lon1) * cos(lat2),
1266                    cos(lat1) * sin(lat2) -
1267                    sin(lat1) * cos(lat2) * cos(lon2 - lon1));
1268    }
1269    
1270    /* http://mathforum.org/library/drmath/view/51722.html */
1271    static float get_distance(float lat1, float lon1, float lat2, float lon2) {
1272      float aob = acos(cos(lat1) * cos(lat2) * cos(lon2 - lon1) +
1273                       sin(lat1) * sin(lat2));
1274    
1275      //  return(aob * 3959.0);   /* great circle radius in miles */
1276    
1277      return(aob * 6371000.0);     /* great circle radius in meters */
1278    }
1279    
1280    static void
1281    osd_render_nav(osm_gps_map_osd_t *osd)
1282    {
1283        FIN;
1284        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1285    
1286        if(!priv->nav.surface || isnan(priv->nav.lat) || isnan(priv->nav.lon))
1287            return;
1288    
1289        /* first fill with transparency */
1290        g_assert(priv->nav.surface);
1291        cairo_t *cr = cairo_create(priv->nav.surface);
1292      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1293      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);
1294      cairo_paint(cr);      cairo_paint(cr);
1295        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1296    
1297        cairo_select_font_face (cr, "Sans",
1298                                CAIRO_FONT_SLANT_NORMAL,
1299                                CAIRO_FONT_WEIGHT_BOLD);
1300        cairo_set_font_size (cr, OSD_COORDINATES_FONT_SIZE);
1301    
1302        char *latitude = osd_latitude_str(priv->nav.lat);
1303        char *longitude = osd_longitude_str(priv->nav.lon);
1304    
1305        int y = OSD_COORDINATES_OFFSET;
1306        y = osd_render_centered_text(cr, y, OSD_NAV_W, priv->nav.name);
1307        y = osd_render_centered_text(cr, y, OSD_NAV_W, latitude);
1308        y = osd_render_centered_text(cr, y, OSD_NAV_W, longitude);
1309    
1310        g_free(latitude);
1311        g_free(longitude);
1312    
1313        /* everything below this is the compass. we need to know this */
1314        /* to differ between coordinate clicks and compass clicks */
1315        priv->nav.click_sep = y;
1316    
1317        /* draw the compass */
1318        int radius = (OSD_NAV_H - y - 5*OSD_COORDINATES_FONT_SIZE/4)/2;
1319        if(radius > OSD_NAV_W/2)
1320            radius = OSD_NAV_W/2;
1321    
1322        int x = OSD_NAV_W/2+1;
1323        y += radius;
1324    
1325        cairo_stroke (cr);
1326    
1327        /* draw background */
1328        cairo_arc(cr, x, y, radius, 0,  2*M_PI);
1329        cairo_set_source_rgba (cr, 1, 1, 1, 0.5);
1330        cairo_fill_preserve (cr);
1331        cairo_set_source_rgb (cr, 0, 0, 0);
1332        cairo_set_line_width (cr, 1);
1333        cairo_stroke (cr);
1334    
1335        /* draw pointer */
1336    #define ARROW_WIDTH     0.3
1337    #define ARROW_LENGTH    0.7
1338    
1339        coord_t mpos, *pos = osm_gps_map_get_gps (OSM_GPS_MAP(osd->widget));
1340        if(priv->nav.mode) {
1341            gfloat lat, lon;
1342            g_object_get(osd->widget, "latitude", &lat, "longitude", &lon, NULL);
1343            mpos.rlat = deg2rad(lat);
1344            mpos.rlon = deg2rad(lon);
1345            pos = &mpos;
1346        }
1347    
1348        if(pos) {
1349            float arot = get_bearing(pos->rlat, pos->rlon,
1350                         deg2rad(priv->nav.lat), deg2rad(priv->nav.lon));
1351    
1352            cairo_move_to(cr,
1353                          x + radius *  ARROW_LENGTH *  sin(arot),
1354                          y + radius *  ARROW_LENGTH * -cos(arot));
1355    
1356            cairo_line_to(cr,
1357                          x + radius * -ARROW_LENGTH *  sin(arot+ARROW_WIDTH),
1358                          y + radius * -ARROW_LENGTH * -cos(arot+ARROW_WIDTH));
1359    
1360            cairo_line_to(cr,
1361                          x + radius * -0.5 * ARROW_LENGTH *  sin(arot),
1362                          y + radius * -0.5 * ARROW_LENGTH * -cos(arot));
1363    
1364            cairo_line_to(cr,
1365                          x + radius * -ARROW_LENGTH *  sin(arot-ARROW_WIDTH),
1366                          y + radius * -ARROW_LENGTH * -cos(arot-ARROW_WIDTH));
1367    
1368            cairo_close_path(cr);
1369            if(priv->nav.mode)
1370                cairo_set_source_rgb (cr, 0, 0, 0);
1371            else
1372                cairo_set_source_rgb (cr, 0, 0, 0.8);
1373    
1374            cairo_fill (cr);
1375    
1376            y += radius + OSD_COORDINATES_FONT_SIZE/4;
1377    
1378            float dist = get_distance(pos->rlat, pos->rlon,
1379                            deg2rad(priv->nav.lat), deg2rad(priv->nav.lon));
1380    
1381            char *dist_str = NULL;
1382            if(!priv->nav.imperial) {
1383                /* metric is easy ... */
1384                if(dist<1000)
1385                    dist_str = g_strdup_printf("%u m", (int)dist);
1386                else
1387                    dist_str = g_strdup_printf("%.1f km", dist/1000);
1388            } else {
1389                /* and now the hard part: scale for useful imperial values :-( */
1390                /* try to convert to feet, 1ft == 0.3048 m */
1391    
1392                if(dist/(3*0.3048) >= 1760.0)      /* more than 1760 yard? */
1393                    dist_str = g_strdup_printf("%.1f mi", dist/(0.3048*3*1760.0));
1394                else if(dist/0.3048 >= 100)        /* more than 100 feet? */
1395                    dist_str = g_strdup_printf("%.1f yd", dist/(0.3048*3));
1396                else
1397                    dist_str = g_strdup_printf("%.0f ft", dist/0.3048);
1398            }
1399    
1400            y = osd_render_centered_text(cr, y, OSD_NAV_W, dist_str);
1401            g_free(dist_str);
1402        }
1403    
1404        cairo_destroy(cr);
1405        FOUT;
1406    }
1407    
1408    /* check if the user clicked inside the source selection area */
1409    static osd_button_t
1410    osd_nav_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y) {
1411        FIN;
1412        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1413    
1414        if(!priv->nav.surface || down)
1415            return OSD_NONE;
1416    
1417        x -= OSD_X;
1418        if(OSD_X < 0)
1419            x -= (osd->widget->allocation.width - OSD_NAV_W);
1420    
1421        y -= (osd->widget->allocation.height - OSD_NAV_H)/2;
1422    
1423        if(x >= 0 && y >= 0 && x <= OSD_NAV_W && y <= OSD_NAV_H) {
1424            if(y < priv->nav.click_sep)
1425                osm_gps_map_set_center(OSM_GPS_MAP(osd->widget),
1426                                       priv->nav.lat, priv->nav.lon);
1427            else {
1428                priv->nav.mode = !priv->nav.mode;
1429                osm_gps_map_redraw(OSM_GPS_MAP(osd->widget));
1430            }
1431        }
1432    
1433        FOUT;
1434        return OSD_NONE;
1435    }
1436    
1437    void osm_gps_map_osd_clear_nav (OsmGpsMap *map) {
1438        FIN;
1439        g_return_if_fail (OSM_IS_GPS_MAP (map));
1440    
1441        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1442        g_return_if_fail (osd);
1443    
1444        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1445        g_return_if_fail (priv);
1446    
1447        if(priv->nav.surface) {
1448            cairo_surface_destroy(priv->nav.surface);
1449            priv->nav.surface = NULL;
1450            priv->nav.lat = OSM_GPS_MAP_INVALID;
1451            priv->nav.lon = OSM_GPS_MAP_INVALID;
1452            if(priv->nav.name) g_free(priv->nav.name);
1453        }
1454        osm_gps_map_redraw(map);
1455        FOUT;
1456    }
1457    
1458    void
1459    osm_gps_map_osd_draw_nav (OsmGpsMap *map, gboolean imperial,
1460                              float latitude, float longitude, char *name) {
1461        FIN;
1462        g_return_if_fail (OSM_IS_GPS_MAP (map));
1463    
1464        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1465        g_return_if_fail (osd);
1466    
1467        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1468        g_return_if_fail (priv);
1469    
1470        osm_gps_map_osd_clear_nav (map);
1471    
1472        /* allocate balloon surface */
1473        priv->nav.surface =
1474            cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1475                                       OSD_NAV_W+2, OSD_NAV_H+2);
1476    
1477        priv->nav.lat = latitude;
1478        priv->nav.lon = longitude;
1479        priv->nav.name = g_strdup(name);
1480        priv->nav.imperial = imperial;
1481    
1482        osd_render_nav(osd);
1483    
1484        osm_gps_map_redraw(map);
1485        FOUT;
1486    }
1487    
1488    #endif // OSD_NAV
1489    
1490    static osd_button_t
1491    osd_check_int(osm_gps_map_osd_t *osd, gboolean click, gboolean down, gint x, gint y) {
1492        FIN;
1493        osd_button_t but = OSD_NONE;
1494    
1495    #ifdef OSD_BALLOON
1496        if(down) {
1497            /* needed to handle balloons that are created at click */
1498            osd_priv_t *priv = (osd_priv_t*)osd->priv;
1499            priv->balloon.just_created = FALSE;
1500        }
1501    #endif
1502    
1503    #ifdef OSD_SOURCE_SEL
1504        /* the source selection area is handles internally */
1505        but = osd_source_check(osd, down, x, y);
1506    #endif
1507    
1508    #ifdef OSD_NAV
1509        if(but == OSD_NONE) {
1510            /* the source selection area is handles internally */
1511            but = osd_nav_check(osd, down, x, y);
1512        }
1513    #endif
1514    
1515        if(but == OSD_NONE) {
1516            gint mx = x - OSD_X;
1517            gint my = y - OSD_Y;
1518    
1519            if(OSD_X < 0)
1520                mx -= (osd->widget->allocation.width - OSD_W);
1521    
1522            if(OSD_Y < 0)
1523                my -= (osd->widget->allocation.height - OSD_H);
1524    
1525            /* first do a rough test for the OSD area. */
1526            /* this is just to avoid an unnecessary detailed test */
1527            if(mx > 0 && mx < OSD_W && my > 0 && my < OSD_H) {
1528    #ifndef OSD_NO_DPAD
1529                but = osd_check_dpad(mx, my);
1530    #endif
1531            }
1532    
1533            if(but == OSD_NONE)
1534                but = osd_check_zoom(mx, my);
1535        }
1536    
1537    #ifdef OSD_BALLOON
1538        if(but == OSD_NONE) {
1539            /* check if user clicked into balloon */
1540            if(osd_balloon_check(osd, click, down, x, y))
1541                but = OSD_BG;
1542        }
1543    #endif
1544    
1545        FOUT;
1546        return but;
1547    }
1548    
1549    
1550    #ifdef OSD_CROSSHAIR
1551    
1552    #ifndef OSD_CROSSHAIR_RADIUS
1553    #define OSD_CROSSHAIR_RADIUS 10
1554    #endif
1555    
1556    #define OSD_CROSSHAIR_TICK  (OSD_CROSSHAIR_RADIUS/2)
1557    #define OSD_CROSSHAIR_BORDER (OSD_CROSSHAIR_TICK + OSD_CROSSHAIR_RADIUS/4)
1558    #define OSD_CROSSHAIR_W  ((OSD_CROSSHAIR_RADIUS+OSD_CROSSHAIR_BORDER)*2)
1559    #define OSD_CROSSHAIR_H  ((OSD_CROSSHAIR_RADIUS+OSD_CROSSHAIR_BORDER)*2)
1560    
1561    static void
1562    osd_render_crosshair_shape(cairo_t *cr) {
1563        FIN;
1564        cairo_arc (cr, OSD_CROSSHAIR_W/2, OSD_CROSSHAIR_H/2,
1565                   OSD_CROSSHAIR_RADIUS, 0,  2*M_PI);
1566    
1567        cairo_move_to (cr, OSD_CROSSHAIR_W/2 - OSD_CROSSHAIR_RADIUS,
1568                       OSD_CROSSHAIR_H/2);
1569        cairo_rel_line_to (cr, -OSD_CROSSHAIR_TICK, 0);
1570        cairo_move_to (cr, OSD_CROSSHAIR_W/2 + OSD_CROSSHAIR_RADIUS,
1571                       OSD_CROSSHAIR_H/2);
1572        cairo_rel_line_to (cr,  OSD_CROSSHAIR_TICK, 0);
1573    
1574        cairo_move_to (cr, OSD_CROSSHAIR_W/2,
1575                       OSD_CROSSHAIR_H/2 - OSD_CROSSHAIR_RADIUS);
1576        cairo_rel_line_to (cr, 0, -OSD_CROSSHAIR_TICK);
1577        cairo_move_to (cr, OSD_CROSSHAIR_W/2,
1578                       OSD_CROSSHAIR_H/2 + OSD_CROSSHAIR_RADIUS);
1579        cairo_rel_line_to (cr, 0, OSD_CROSSHAIR_TICK);
1580    
1581        cairo_stroke (cr);
1582        FOUT;
1583    }
1584    
1585    static void
1586    osd_render_crosshair(osm_gps_map_osd_t *osd)
1587    {
1588        FIN;
1589        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1590    
1591        if(!priv->crosshair.surface || priv->crosshair.rendered)
1592            return;
1593    
1594        priv->crosshair.rendered = TRUE;
1595    
1596        /* first fill with transparency */
1597        g_assert(priv->crosshair.surface);
1598        cairo_t *cr = cairo_create(priv->crosshair.surface);
1599        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1600        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
1601        cairo_paint(cr);
1602      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1603    
1604      /* --------- draw zoom and dpad shape shadow ----------- */      cairo_set_line_cap  (cr, CAIRO_LINE_CAP_ROUND);
1605      gint x = 0, y = 0;  
1606        cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.5);
1607        cairo_set_line_width (cr, OSD_CROSSHAIR_RADIUS/2);
1608        osd_render_crosshair_shape(cr);
1609    
1610        cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.5);
1611        cairo_set_line_width (cr, OSD_CROSSHAIR_RADIUS/4);
1612        osd_render_crosshair_shape(cr);
1613    
1614      osm_gps_map_osd_zoom_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);      cairo_destroy(cr);
1615      osm_gps_map_osd_shape_shadow(cr);      FOUT;
1616      osm_gps_map_osd_dpad_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);  }
1617      osm_gps_map_osd_shape_shadow(cr);  #endif
1618    
1619    #ifdef OSD_SCALE
1620    
1621    #ifndef OSD_SCALE_FONT_SIZE
1622    #define OSD_SCALE_FONT_SIZE (12.0)
1623    #endif
1624    #define OSD_SCALE_W   (10*OSD_SCALE_FONT_SIZE)
1625    #define OSD_SCALE_H   (5*OSD_SCALE_FONT_SIZE/2)
1626    
1627    /* various parameters used to create the scale */
1628    #define OSD_SCALE_H2   (OSD_SCALE_H/2)
1629    #define OSD_SCALE_TICK (2*OSD_SCALE_FONT_SIZE/3)
1630    #define OSD_SCALE_M    (OSD_SCALE_H2 - OSD_SCALE_TICK)
1631    #define OSD_SCALE_I    (OSD_SCALE_H2 + OSD_SCALE_TICK)
1632    #define OSD_SCALE_FD   (OSD_SCALE_FONT_SIZE/4)
1633    
1634    static void
1635    osd_render_scale(osm_gps_map_osd_t *osd)
1636    {
1637        FIN;
1638        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1639    
1640        if(!priv->scale.surface)
1641            return;
1642    
1643        /* this only needs to be rendered if the zoom has changed */
1644        gint zoom;
1645        g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);
1646        if(zoom == priv->scale.zoom)
1647            return;
1648    
1649        priv->scale.zoom = zoom;
1650    
1651        float m_per_pix = osm_gps_map_get_scale(OSM_GPS_MAP(osd->widget));
1652    
1653        /* first fill with transparency */
1654        g_assert(priv->scale.surface);
1655        cairo_t *cr = cairo_create(priv->scale.surface);
1656        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1657        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
1658        // pink for testing:    cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2);
1659        cairo_paint(cr);
1660        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1661    
1662        /* determine the size of the scale width in meters */
1663        float width = (OSD_SCALE_W-OSD_SCALE_FONT_SIZE/6) * m_per_pix;
1664    
1665        /* scale this to useful values */
1666        int exp = logf(width)*M_LOG10E;
1667        int mant = width/pow(10,exp);
1668        int width_metric = mant * pow(10,exp);
1669        char *dist_str = NULL;
1670        if(width_metric<1000)
1671            dist_str = g_strdup_printf("%u m", width_metric);
1672        else
1673            dist_str = g_strdup_printf("%u km", width_metric/1000);
1674        width_metric /= m_per_pix;
1675    
1676        /* and now the hard part: scale for useful imperial values :-( */
1677        /* try to convert to feet, 1ft == 0.3048 m */
1678        width /= 0.3048;
1679        float imp_scale = 0.3048;
1680        char *dist_imp_unit = "ft";
1681    
1682        if(width >= 100) {
1683            /* 1yd == 3 feet */
1684            width /= 3.0;
1685            imp_scale *= 3.0;
1686            dist_imp_unit = "yd";
1687    
1688            if(width >= 1760.0) {
1689                /* 1mi == 1760 yd */
1690                width /= 1760.0;
1691                imp_scale *= 1760.0;
1692                dist_imp_unit = "mi";
1693            }
1694        }
1695    
1696        /* also convert this to full tens/hundreds */
1697        exp = logf(width)*M_LOG10E;
1698        mant = width/pow(10,exp);
1699        int width_imp = mant * pow(10,exp);
1700        char *dist_str_imp = g_strdup_printf("%u %s", width_imp, dist_imp_unit);
1701    
1702        /* convert back to pixels */
1703        width_imp *= imp_scale;
1704        width_imp /= m_per_pix;
1705    
1706        cairo_select_font_face (cr, "Sans",
1707                                CAIRO_FONT_SLANT_NORMAL,
1708                                CAIRO_FONT_WEIGHT_BOLD);
1709        cairo_set_font_size (cr, OSD_SCALE_FONT_SIZE);
1710        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
1711    
1712        cairo_text_extents_t extents;
1713        cairo_text_extents (cr, dist_str, &extents);
1714    
1715        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
1716        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6);
1717        cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD);
1718        cairo_text_path (cr, dist_str);
1719        cairo_stroke (cr);
1720        cairo_move_to (cr, 2*OSD_SCALE_FD,
1721                       OSD_SCALE_H2+OSD_SCALE_FD + extents.height);
1722        cairo_text_path (cr, dist_str_imp);
1723        cairo_stroke (cr);
1724    
1725        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
1726        cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD);
1727        cairo_show_text (cr, dist_str);
1728        cairo_move_to (cr, 2*OSD_SCALE_FD,
1729                       OSD_SCALE_H2+OSD_SCALE_FD + extents.height);
1730        cairo_show_text (cr, dist_str_imp);
1731    
1732        g_free(dist_str);
1733        g_free(dist_str_imp);
1734    
1735        /* draw white line */
1736        cairo_set_line_cap  (cr, CAIRO_LINE_CAP_ROUND);
1737        cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);
1738        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/3);
1739        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M);
1740        cairo_rel_line_to (cr, 0,  OSD_SCALE_TICK);
1741        cairo_rel_line_to (cr, width_metric, 0);
1742        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1743        cairo_stroke(cr);
1744        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I);
1745        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1746        cairo_rel_line_to (cr, width_imp, 0);
1747        cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK);
1748        cairo_stroke(cr);
1749    
1750        /* draw black line */
1751        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
1752        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6);
1753        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M);
1754        cairo_rel_line_to (cr, 0,  OSD_SCALE_TICK);
1755        cairo_rel_line_to (cr, width_metric, 0);
1756        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1757        cairo_stroke(cr);
1758        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I);
1759        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1760        cairo_rel_line_to (cr, width_imp, 0);
1761        cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK);
1762        cairo_stroke(cr);
1763    
1764        cairo_destroy(cr);
1765        FOUT;
1766    }
1767    #endif
1768    
1769    static void
1770    osd_render_controls(osm_gps_map_osd_t *osd)
1771    {
1772        FIN;
1773        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1774    
1775        if(!priv->controls.surface)
1776            return;
1777    
1778        if(priv->controls.rendered
1779    #ifdef OSD_GPS_BUTTON
1780           && (priv->controls.gps_enabled == (osd->cb != NULL))
1781    #endif
1782           )
1783            return;
1784    
1785    #ifdef OSD_GPS_BUTTON
1786        priv->controls.gps_enabled = (osd->cb != NULL);
1787    #endif
1788        priv->controls.rendered = TRUE;
1789    
1790    #ifndef OSD_COLOR
1791        GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
1792        GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
1793        GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
1794    #endif
1795    
1796        /* first fill with transparency */
1797        g_assert(priv->controls.surface);
1798        cairo_t *cr = cairo_create(priv->controls.surface);
1799        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1800        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
1801        cairo_paint(cr);
1802        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1803    
1804        /* --------- draw zoom and dpad shape shadow ----------- */
1805    #ifdef OSD_SHADOW_ENABLE
1806        osd_zoom_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
1807        osd_shape_shadow(cr);
1808    #ifndef OSD_NO_DPAD
1809        osd_dpad_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
1810        osd_shape_shadow(cr);
1811    #endif
1812    #endif
1813    
1814      /* --------- draw zoom and dpad shape ----------- */      /* --------- draw zoom and dpad shape ----------- */
1815    
1816      osm_gps_map_osd_zoom_shape(cr, x, y);      osd_zoom_shape(cr, 1, 1);
1817      osm_gps_map_osd_shape(cr);  #ifndef OSD_COLOR
1818      osm_gps_map_osd_dpad_shape(cr, x, y);      osd_shape(cr, &bg, &fg);
1819      osm_gps_map_osd_shape(cr);  #else
1820        osd_shape(cr);
1821    #endif
1822    #ifndef OSD_NO_DPAD
1823        osd_dpad_shape(cr, 1, 1);
1824    #ifndef OSD_COLOR
1825        osd_shape(cr, &bg, &fg);
1826    #else
1827        osd_shape(cr);
1828    #endif
1829    #endif
1830    
1831      /* --------- draw zoom and dpad labels --------- */      /* --------- draw zoom and dpad labels --------- */
1832    
1833      osm_gps_map_osd_zoom_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);  #ifdef OSD_SHADOW_ENABLE
1834      osm_gps_map_osd_dpad_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);      osd_labels_shadow(cr, Z_RAD/3, TRUE);
1835      osm_gps_map_osd_labels_shadow(cr, Z_RAD/3, TRUE);      osd_zoom_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
1836      osm_gps_map_osd_dpad_gps(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);  #ifndef OSD_NO_DPAD
1837      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);
1838    #endif
1839      osm_gps_map_osd_zoom_labels(cr, x, y);      cairo_stroke(cr);
1840      osm_gps_map_osd_dpad_labels(cr, x, y);  #ifdef OSD_GPS_BUTTON
1841      osm_gps_map_osd_labels(cr, Z_RAD/3, TRUE);      osd_labels_shadow(cr, Z_RAD/6, osd->cb != NULL);
1842      osm_gps_map_osd_dpad_gps(cr, x, y);      osd_dpad_gps(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
1843      osm_gps_map_osd_labels(cr, Z_RAD/6, osd->cb != NULL);      cairo_stroke(cr);
1844    #endif
1845    #endif
1846    
1847    #ifndef OSD_COLOR
1848        osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
1849    #else
1850        osd_labels(cr, Z_RAD/3, TRUE);
1851    #endif
1852        osd_zoom_labels(cr, 1, 1);
1853    #ifndef OSD_NO_DPAD
1854        osd_dpad_labels(cr, 1, 1);
1855    #endif
1856        cairo_stroke(cr);
1857    
1858    #ifndef OSD_COLOR
1859        osd_labels(cr, Z_RAD/6, osd->cb != NULL, &fg, &da);
1860    #else
1861        osd_labels(cr, Z_RAD/6, osd->cb != NULL);
1862    #endif
1863    #ifdef OSD_GPS_BUTTON
1864        osd_dpad_gps(cr, 1, 1);
1865    #endif
1866        cairo_stroke(cr);
1867    
1868      cairo_destroy(cr);      cairo_destroy(cr);
1869  }  }
1870    
1871  static void  static void
1872  osm_gps_map_osd_draw(osm_gps_map_osd_t *osd, gint xoffset, gint yoffset)  osd_render(osm_gps_map_osd_t *osd)
1873  {  {
1874      osd_priv_t *priv = (osd_priv_t*)osd->priv;      /* this function is actually called pretty often since the */
1875        /* OSD contents may have changed (due to a coordinate/zoom change). */
1876        /* The different OSD parts have to make sure that they don't */
1877        /* render unneccessarily often and thus waste CPU power */
1878    
1879      /* backup previous contents */      osd_render_controls(osd);
     if(!priv->backup)  
         priv->backup = gdk_pixmap_new(osd->pixmap, OSD_W+2, OSD_H+2, -1);  
1880    
1881      gint x = OSD_X + xoffset;  #ifdef OSD_SOURCE_SEL
1882      gint y = OSD_Y + yoffset;      osd_render_source_sel(osd, FALSE);
1883    #endif
1884    
1885    #ifdef OSD_SCALE
1886        osd_render_scale(osd);
1887    #endif
1888    
1889    #ifdef OSD_CROSSHAIR
1890        osd_render_crosshair(osd);
1891    #endif
1892    
1893      /* create backup of background */  #ifdef OSD_NAV
1894      gdk_draw_drawable(priv->backup,      osd_render_nav(osd);
1895          osd->widget->style->fg_gc[GTK_WIDGET_STATE(osd->widget)],  #endif
1896                        osd->pixmap, x-1, y-1, 0, 0, OSD_W+2, OSD_H+2);  
1897    #ifdef OSD_COORDINATES
1898        osd_render_coordinates(osd);
1899    #endif
1900    }
1901    
1902      priv->backup_x = x-1;  static void
1903      priv->backup_y = y-1;  osd_draw(osm_gps_map_osd_t *osd, GdkDrawable *drawable)
1904    {
1905        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1906    
1907      /* OSD itself uses some off-screen rendering, so check if the */      /* OSD itself uses some off-screen rendering, so check if the */
1908      /* offscreen buffer is present and create it if not */      /* offscreen buffer is present and create it if not */
1909      if(!priv->overlay) {      if(!priv->controls.surface) {
1910          /* create overlay ... */          /* create overlay ... */
1911          priv->overlay =          priv->controls.surface =
1912              cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W, OSD_H);              cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W+2, OSD_H+2);
1913    
1914            priv->controls.rendered = FALSE;
1915    #ifdef OSD_GPS_BUTTON
1916            priv->controls.gps_enabled = FALSE;
1917    #endif
1918    
1919    #ifdef OSD_SOURCE_SEL
1920            /* the initial OSD state is alway not-expanded */
1921            priv->source_sel.surface =
1922                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1923                                               OSD_S_W+2, OSD_S_H+2);
1924            priv->source_sel.rendered = FALSE;
1925    #endif
1926    
1927    #ifdef OSD_SCALE
1928            priv->scale.surface =
1929                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1930                                           OSD_SCALE_W, OSD_SCALE_H);
1931            priv->scale.zoom = -1;
1932    #endif
1933    
1934    #ifdef OSD_CROSSHAIR
1935            priv->crosshair.surface =
1936                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1937                                           OSD_CROSSHAIR_W, OSD_CROSSHAIR_H);
1938            priv->crosshair.rendered = FALSE;
1939    #endif
1940    
1941    #ifdef OSD_COORDINATES
1942            priv->coordinates.surface =
1943                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1944                                           OSD_COORDINATES_W, OSD_COORDINATES_H);
1945    
1946            priv->coordinates.lat = priv->coordinates.lon = OSM_GPS_MAP_INVALID;
1947    #endif
1948    
1949          /* ... and render it */          /* ... and render it */
1950          osm_gps_map_osd_render(osd);          osd_render(osd);
1951      }      }
1952    
1953      // now draw this onto the original context      // now draw this onto the original context
1954      cairo_t *cr = gdk_cairo_create(osd->pixmap);      cairo_t *cr = gdk_cairo_create(drawable);
1955      cairo_set_source_surface(cr, priv->overlay, x, y);  
1956        gint x, y;
1957    
1958    #ifdef OSD_SCALE
1959        x =  OSD_X;
1960        y = -OSD_Y;
1961        if(x < 0) x += osd->widget->allocation.width - OSD_SCALE_W;
1962        if(y < 0) y += osd->widget->allocation.height - OSD_SCALE_H;
1963    
1964        cairo_set_source_surface(cr, priv->scale.surface, x, y);
1965      cairo_paint(cr);      cairo_paint(cr);
1966      cairo_destroy(cr);  #endif
 }  
1967    
1968  static void  #ifdef OSD_CROSSHAIR
1969  osm_gps_map_osd_restore (osm_gps_map_osd_t *osd)      x = (osd->widget->allocation.width - OSD_CROSSHAIR_W)/2;
1970  {      y = (osd->widget->allocation.height - OSD_CROSSHAIR_H)/2;
1971      osd_priv_t *priv = (osd_priv_t*)osd->priv;  
1972        cairo_set_source_surface(cr, priv->crosshair.surface, x, y);
1973        cairo_paint(cr);
1974    #endif
1975    
1976    #ifdef OSD_NAV
1977        if(priv->nav.surface) {
1978            x =  OSD_X;
1979            if(x < 0) x += osd->widget->allocation.width - OSD_NAV_W;
1980            y = (osd->widget->allocation.height - OSD_NAV_H)/2;
1981    
1982            cairo_set_source_surface(cr, priv->nav.surface, x, y);
1983            cairo_paint(cr);
1984        }
1985    #endif
1986    
1987    #ifdef OSD_COORDINATES
1988        x = -OSD_X;
1989        y = -OSD_Y;
1990        if(x < 0) x += osd->widget->allocation.width - OSD_COORDINATES_W;
1991        if(y < 0) y += osd->widget->allocation.height - OSD_COORDINATES_H;
1992    
1993        cairo_set_source_surface(cr, priv->coordinates.surface, x, y);
1994        cairo_paint(cr);
1995    #endif
1996    
1997    #ifdef OSD_BALLOON
1998        if(priv->balloon.surface) {
1999    
2000            /* convert given lat lon into screen coordinates */
2001            gint x, y;
2002            osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget),
2003                                          priv->balloon.lat, priv->balloon.lon,
2004                                          &x, &y);
2005    
2006            /* check if balloon needs to be rerendered */
2007            osd_render_balloon(osd);
2008    
2009            cairo_set_source_surface(cr, priv->balloon.surface,
2010                                     x + priv->balloon.offset_x,
2011                                     y + priv->balloon.offset_y);
2012            cairo_paint(cr);
2013        }
2014    #endif
2015    
2016        x = OSD_X;
2017        if(x < 0)
2018            x += osd->widget->allocation.width - OSD_W;
2019    
2020        y = OSD_Y;
2021        if(y < 0)
2022            y += osd->widget->allocation.height - OSD_H;
2023    
2024      /* restore backup of previous contents */      cairo_set_source_surface(cr, priv->controls.surface, x, y);
2025      if(priv->backup) {      cairo_paint(cr);
2026          /* create backup of background */  
2027          gdk_draw_drawable(osd->pixmap,  #ifdef OSD_SOURCE_SEL
2028                            osd->widget->style->fg_gc[GTK_WIDGET_STATE(osd->widget)],      if(!priv->source_sel.handler_id) {
2029                            priv->backup, 0, 0,          /* the OSD source selection is not being animated */
2030                            priv->backup_x, priv->backup_y, OSD_W+2, OSD_H+2);          if(!priv->source_sel.expanded)
2031                x = osd->widget->allocation.width - OSD_S_W;
2032            else
2033                x = osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
2034        } else
2035            x = priv->source_sel.shift;
2036    
2037        y = OSD_S_Y;
2038        if(OSD_S_Y < 0) {
2039            if(!priv->source_sel.expanded)
2040                y = osd->widget->allocation.height - OSD_S_H + OSD_S_Y;
2041            else
2042                y = osd->widget->allocation.height - OSD_S_EXP_H + OSD_S_Y;
2043      }      }
2044    
2045        cairo_set_source_surface(cr, priv->source_sel.surface, x, y);
2046        cairo_paint(cr);
2047    #endif
2048    
2049        cairo_destroy(cr);
2050        FOUT;
2051  }  }
2052    
2053  static void  static void
2054  osm_gps_map_osd_free(osm_gps_map_osd_t *osd)  osd_free(osm_gps_map_osd_t *osd)
2055  {  {
2056        FIN;
2057      osd_priv_t *priv = (osd_priv_t *)(osd->priv);      osd_priv_t *priv = (osd_priv_t *)(osd->priv);
2058    
2059      if (priv->backup)      if (priv->controls.surface)
2060          g_object_unref(priv->backup);           cairo_surface_destroy(priv->controls.surface);
2061    
2062    #ifdef OSD_SOURCE_SEL
2063        if(priv->source_sel.handler_id)
2064            gtk_timeout_remove(priv->source_sel.handler_id);
2065    
2066        if (priv->source_sel.surface)
2067             cairo_surface_destroy(priv->source_sel.surface);
2068    #endif
2069    
2070    #ifdef OSD_SCALE
2071        if (priv->scale.surface)
2072             cairo_surface_destroy(priv->scale.surface);
2073    #endif
2074    
2075    #ifdef OSD_CROSSHAIR
2076        if (priv->crosshair.surface)
2077             cairo_surface_destroy(priv->crosshair.surface);
2078    #endif
2079    
2080    #ifdef OSD_NAV
2081        if (priv->nav.surface)
2082             cairo_surface_destroy(priv->nav.surface);
2083    #endif
2084    
2085      if (priv->overlay)  #ifdef OSD_COORDINATES
2086           cairo_surface_destroy(priv->overlay);      if (priv->coordinates.surface)
2087             cairo_surface_destroy(priv->coordinates.surface);
2088    #endif
2089    
2090    #ifdef OSD_BALLOON
2091        if (priv->balloon.surface)
2092             cairo_surface_destroy(priv->balloon.surface);
2093    #endif
2094    
2095        printf("freeing priv\n");
2096      g_free(priv);      g_free(priv);
2097        FOUT;
2098    }
2099    
2100    static gboolean
2101    osd_busy(osm_gps_map_osd_t *osd)
2102    {
2103        FIN;
2104    #ifdef OSD_SOURCE_SEL
2105        osd_priv_t *priv = (osd_priv_t *)(osd->priv);
2106        return (priv->source_sel.handler_id != 0);
2107    #else
2108        return FALSE;
2109    #endif
2110    }
2111    
2112    static osd_button_t
2113    osd_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y) {
2114        FIN;
2115        return osd_check_int(osd, TRUE, down, x, y);
2116  }  }
2117    
2118  static osm_gps_map_osd_t osd_classic = {  static osm_gps_map_osd_t osd_classic = {
2119      .restore    = osm_gps_map_osd_restore,      .widget     = NULL,
2120      .draw       = osm_gps_map_osd_draw,  
2121      .check      = osm_gps_map_osd_check,      .draw       = osd_draw,
2122      .render     = osm_gps_map_osd_render,      .check      = osd_check,
2123      .free       = osm_gps_map_osd_free,      .render     = osd_render,
2124        .free       = osd_free,
2125        .busy       = osd_busy,
2126    
2127      .cb         = NULL,      .cb         = NULL,
2128      .data       = NULL,      .data       = NULL,
# Line 397  static osm_gps_map_osd_t osd_classic = { Line 2134  static osm_gps_map_osd_t osd_classic = {
2134  void  void
2135  osm_gps_map_osd_classic_init(OsmGpsMap *map)  osm_gps_map_osd_classic_init(OsmGpsMap *map)
2136  {  {
2137        FIN;
2138      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);
2139        printf("alloc new osd priv\n");
2140    
2141    #ifdef OSD_BALLOON
2142        priv->balloon.lat = OSM_GPS_MAP_INVALID;
2143        priv->balloon.lon = OSM_GPS_MAP_INVALID;
2144    #endif
2145    
2146      osd_classic.priv = priv;      osd_classic.priv = priv;
2147    
2148      osm_gps_map_register_osd(map, &osd_classic);      osm_gps_map_register_osd(map, &osd_classic);
2149        FOUT;
2150  }  }
2151    
2152    #ifdef OSD_GPS_BUTTON
2153  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 */
2154    /* but instead are to be used by the main application */
2155    void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb,
2156                                     gpointer data) {
2157        FIN;
2158      osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);      osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
   
2159      g_return_if_fail (osd);      g_return_if_fail (osd);
2160    
2161      osd->cb = cb;      osd->cb = cb;
# Line 418  void osm_gps_map_osd_enable_gps (OsmGpsM Line 2166  void osm_gps_map_osd_enable_gps (OsmGpsM
2166      osd->render(osd);      osd->render(osd);
2167    
2168      osm_gps_map_redraw(map);      osm_gps_map_redraw(map);
2169        FOUT;
2170    }
2171    #endif
2172    
2173    osd_button_t
2174    osm_gps_map_osd_check(OsmGpsMap *map, gint x, gint y) {
2175        FIN;
2176        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
2177        g_return_val_if_fail (osd, OSD_NONE);
2178    
2179        return osd_check_int(osd, FALSE, TRUE, x, y);
2180  }  }
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