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

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revision 71 by harbaum, Fri Aug 21 13:20:40 2009 UTC revision 133 by harbaum, Mon Oct 12 20:27:55 2009 UTC
# Line 17  Line 17 
17   * with this program.  If not, see <http://www.gnu.org/licenses/>.   * with this program.  If not, see <http://www.gnu.org/licenses/>.
18   */   */
19    
20  #include "config.h"  #include "config.h"
21    #include <stdlib.h>  // abs
22    #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 29  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"
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 *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      cairo_surface_t *overlay;  #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    
     OsmGpsMapOsdGpsCallback cb;  
     gpointer data;  
108  } osd_priv_t;  } osd_priv_t;
109    
110  /* the osd structure mainly contains various callbacks */  #ifdef OSD_BALLOON
111  /* required to draw and update the OSD */  /* most visual effects are hardcoded by now, but may be made */
112  typedef struct {  /* 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      void(enable_gps)(OsmGpsMap *, OsmGpsMapOsdGpsCallback, gpointer);  #define BALLOON_BORDER               (BALLOON_CORNER_RADIUS/2)
124      void(restore)(OsmGpsMap*);  #define BALLOON_WIDTH                (BALLOON_AREA_WIDTH + 2 * BALLOON_BORDER)
125      void(draw)(OsmGpsMap *, gint, gint);  #define BALLOON_HEIGHT               (BALLOON_AREA_HEIGHT + 2 * BALLOON_BORDER)
126      void(render)(OsmGpsMapPrivate *);  #define BALLOON_TRANSPARENCY         0.8
127      osd_button_t(*check)(gint, gint);       /* check if x/y lies within OSD */  #define POINTER_HEIGHT                20
128      void(free)(gpointer);  #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      gpointer priv;  #define BALLOON_W  (BALLOON_WIDTH + BALLOON_SHADOW)
134  } osm_gps_map_osd_t;  #define BALLOON_H  (BALLOON_HEIGHT + POINTER_HEIGHT + BALLOON_SHADOW)
135    
136  static osm_gps_map_osd_t osd_classic = {  #define CLOSE_BUTTON_RADIUS   (BALLOON_CORNER_RADIUS)
     .restore    = osm_gps_map_osd_restore,  
     .draw       = osm_gps_map_osd_draw_controls,  
     .check      = osm_gps_map_osd_check,  
     .render     = osm_gps_map_osd_render,  
     .enable_gps = osm_gps_map_osd_enable_gps,  
     .free       = osm_gps_map_osd_free,  
     .priv       = NULL;  
 }  
137    
138  /* this is the only function that's externally visible */  
139  osm_gps_map_osd_t *  /* draw the bubble shape. this is used twice, once for the shape and once */
140  osm_gps_map_osd_classic_init(void)  /* for the shadow */
141  {  static void
142      return osd_classic;  osm_gps_map_draw_balloon_shape (cairo_t *cr, int x0, int y0, int x1, int y1,
143           gboolean bottom, int px, int py, int px0, int px1) {
144    
145        cairo_move_to (cr, x0, y0 + BALLOON_CORNER_RADIUS);
146        cairo_arc (cr, x0 + BALLOON_CORNER_RADIUS, y0 + BALLOON_CORNER_RADIUS,
147                   BALLOON_CORNER_RADIUS, -M_PI, -M_PI/2);
148        if(!bottom) {
149            /* insert top pointer */
150            cairo_line_to (cr, px1, y0);
151            cairo_line_to (cr, px, py);
152            cairo_line_to (cr, px0, y0);
153        }
154    
155        cairo_line_to (cr, x1 - BALLOON_CORNER_RADIUS, y0);
156        cairo_arc (cr, x1 - BALLOON_CORNER_RADIUS, y0 + BALLOON_CORNER_RADIUS,
157                   BALLOON_CORNER_RADIUS, -M_PI/2, 0);
158        cairo_line_to (cr, x1 , y1 - BALLOON_CORNER_RADIUS);
159        cairo_arc (cr, x1 - BALLOON_CORNER_RADIUS, y1 - BALLOON_CORNER_RADIUS,
160                   BALLOON_CORNER_RADIUS, 0, M_PI/2);
161        if(bottom) {
162            /* insert bottom pointer */
163            cairo_line_to (cr, px0, y1);
164            cairo_line_to (cr, px, py);
165            cairo_line_to (cr, px1, y1);
166        }
167    
168        cairo_line_to (cr, x0 + BALLOON_CORNER_RADIUS, y1);
169        cairo_arc (cr, x0 + BALLOON_CORNER_RADIUS, y1 - BALLOON_CORNER_RADIUS,
170                   BALLOON_CORNER_RADIUS, M_PI/2, M_PI);
171    
172        cairo_close_path (cr);
173  }  }
174    
175  static void  static void
176  osm_gps_map_osd_free(gpointer priv_ptr)  osd_render_balloon(osm_gps_map_osd_t *osd) {
177        osd_priv_t *priv = (osd_priv_t*)osd->priv;
178    
179        /* get zoom */
180        gint zoom;
181        g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);
182    
183        /* ------- convert given coordinate into screen position --------- */
184        gint xs, ys;
185        osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget),
186                                          priv->balloon.lat, priv->balloon.lon,
187                                          &xs, &ys);
188    
189        gint x0 = 1, y0 = 1;
190    
191        /* check position of this relative to screen center to determine */
192        /* pointer direction ... */
193        int pointer_x, pointer_x0, pointer_x1;
194        int pointer_y;
195    
196        /* ... and calculate position */
197        int orientation = 0;
198        if(xs > osd->widget->allocation.width/2) {
199            priv->balloon.offset_x = -BALLOON_WIDTH + POINTER_OFFSET;
200            pointer_x = x0 - priv->balloon.offset_x;
201            pointer_x0 = pointer_x - (BALLOON_CORNER_RADIUS - POINTER_OFFSET);
202            pointer_x1 = pointer_x0 - POINTER_FOOT_WIDTH;
203            orientation |= 1;
204        } else {
205            priv->balloon.offset_x = -POINTER_OFFSET;
206            pointer_x = x0 - priv->balloon.offset_x;
207            pointer_x1 = pointer_x + (BALLOON_CORNER_RADIUS - POINTER_OFFSET);
208            pointer_x0 = pointer_x1 + POINTER_FOOT_WIDTH;
209        }
210    
211        gboolean bottom = FALSE;
212        if(ys > osd->widget->allocation.height/2) {
213            priv->balloon.offset_y = -BALLOON_HEIGHT - POINTER_HEIGHT;
214            pointer_y = y0 - priv->balloon.offset_y;
215            bottom = TRUE;
216            orientation |= 2;
217        } else {
218            priv->balloon.offset_y = 0;
219            pointer_y = y0 - priv->balloon.offset_y;
220            y0 += POINTER_HEIGHT;
221        }
222    
223        /* if required orientation equals current one, then don't render */
224        /* anything */
225        if(orientation == priv->balloon.orientation)
226            return;
227    
228        priv->balloon.orientation = orientation;
229    
230        /* calculate bottom/right of box */
231        int x1 = x0 + BALLOON_WIDTH, y1 = y0 + BALLOON_HEIGHT;
232    
233        /* save balloon screen coordinates for later use */
234        priv->balloon.rect.x = x0 + BALLOON_BORDER;
235        priv->balloon.rect.y = y0 + BALLOON_BORDER;
236        priv->balloon.rect.w = x1 - x0 - 2*BALLOON_BORDER;
237        priv->balloon.rect.h = y1 - y0 - 2*BALLOON_BORDER;
238    
239        cairo_t *cr = cairo_create(priv->balloon.surface);
240        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
241        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
242        cairo_paint(cr);
243        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
244    
245        /* --------- draw shadow --------------- */
246        osm_gps_map_draw_balloon_shape (cr,
247                     x0 + BALLOON_SHADOW, y0 + BALLOON_SHADOW,
248                     x1 + BALLOON_SHADOW, y1 + BALLOON_SHADOW,
249                     bottom, pointer_x, pointer_y,
250                     pointer_x0 + BALLOON_SHADOW, pointer_x1 + BALLOON_SHADOW);
251    
252        cairo_set_source_rgba (cr, 0, 0, 0, BALLOON_SHADOW_TRANSPARENCY);
253        cairo_fill_preserve (cr);
254        cairo_set_source_rgba (cr, 1, 0, 0, 1.0);
255        cairo_set_line_width (cr, 0);
256        cairo_stroke (cr);
257    
258        /* --------- draw main shape ----------- */
259        osm_gps_map_draw_balloon_shape (cr, x0, y0, x1, y1,
260                     bottom, pointer_x, pointer_y, pointer_x0, pointer_x1);
261    
262        cairo_set_source_rgba (cr, 1, 1, 1, BALLOON_TRANSPARENCY);
263        cairo_fill_preserve (cr);
264        cairo_set_source_rgba (cr, 0, 0, 0, BALLOON_TRANSPARENCY);
265        cairo_set_line_width (cr, 1);
266        cairo_stroke (cr);
267    
268        if (priv->balloon.cb) {
269            /* clip in case application tries to draw in */
270                /* exceed of the balloon */
271            cairo_rectangle (cr, priv->balloon.rect.x, priv->balloon.rect.y,
272                             priv->balloon.rect.w, priv->balloon.rect.h);
273            cairo_clip (cr);
274            cairo_new_path (cr);  /* current path is not
275                                     consumed by cairo_clip() */
276    
277            priv->balloon.cb(cr, &priv->balloon.rect, priv->balloon.data);
278        }
279    
280        cairo_destroy(cr);
281    }
282    
283    /* return true if balloon is being displayed and if */
284    /* the given coordinate is within this balloon */
285    static gboolean
286    osd_balloon_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y)
287  {  {
288      osd_priv_t *priv = (osd_priv_t *)priv_ptr;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
289    
290        if(!priv->balloon.surface)
291            return FALSE;
292    
293      g_free(priv);      gint xs, ys;
294        osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget),
295                                          priv->balloon.lat, priv->balloon.lon,
296                                          &xs, &ys);
297    
298        xs += priv->balloon.rect.x + priv->balloon.offset_x;
299        ys += priv->balloon.rect.y + priv->balloon.offset_y;
300    
301        gboolean is_in =
302            (x > xs) && (x < xs + priv->balloon.rect.w) &&
303            (y > ys) && (y < ys + priv->balloon.rect.h);
304    
305        /* handle the fact that the balloon may have been created by the */
306        /* button down event */
307        if(!is_in && !down && !priv->balloon.just_created) {
308            /* the user actually clicked outside the balloon */
309    
310            /* close the balloon! */
311            osm_gps_map_osd_clear_balloon (OSM_GPS_MAP(osd->widget));
312        }
313    
314        return is_in;
315    }
316    
317    void osm_gps_map_osd_clear_balloon (OsmGpsMap *map) {
318        g_return_if_fail (OSM_IS_GPS_MAP (map));
319    
320        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
321        g_return_if_fail (osd);
322    
323        osd_priv_t *priv = (osd_priv_t*)osd->priv;
324        g_return_if_fail (priv);
325    
326        if(priv->balloon.surface) {
327            cairo_surface_destroy(priv->balloon.surface);
328            priv->balloon.surface = NULL;
329            priv->balloon.lat = OSM_GPS_MAP_INVALID;
330            priv->balloon.lon = OSM_GPS_MAP_INVALID;
331        }
332        osm_gps_map_redraw(map);
333    }
334    
335    void
336    osm_gps_map_osd_draw_balloon (OsmGpsMap *map, float latitude, float longitude,
337                                  OsmGpsMapBalloonCallback cb, gpointer data) {
338        g_return_if_fail (OSM_IS_GPS_MAP (map));
339    
340        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
341        g_return_if_fail (osd);
342    
343        osd_priv_t *priv = (osd_priv_t*)osd->priv;
344        g_return_if_fail (priv);
345    
346        osm_gps_map_osd_clear_balloon (map);
347    
348        /* allocate balloon surface */
349        priv->balloon.surface =
350            cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
351                                       BALLOON_W+2, BALLOON_H+2);
352    
353        priv->balloon.lat = latitude;
354        priv->balloon.lon = longitude;
355        priv->balloon.cb = cb;
356        priv->balloon.data = data;
357        priv->balloon.just_created = TRUE;
358    
359        priv->balloon.orientation = -1;
360    
361        osd_render_balloon(osd);
362    
363        osm_gps_map_redraw(map);
364  }  }
365    
366    #endif // OSD_BALLOON
367    
368  /* position and extent of bounding box */  /* position and extent of bounding box */
369    #ifndef OSD_X
370  #define OSD_X      (10)  #define OSD_X      (10)
371  #define OSD_Y      (10)  #endif
372    
373  #define OSD_COLOR            0.5, 0.5, 1  #ifndef OSD_Y
374  #define OSD_COLOR_DISABLED   0.8, 0.8, 0.8  #define OSD_Y      (10)
375    #endif
376    
377  /* parameters of the direction shape */  /* parameters of the direction shape */
378  #ifndef OSM_GPS_MAP_OSD_DIAMETER  #ifndef OSD_DIAMETER
379  #define D_RAD  (30)         // diameter of dpad  #define D_RAD  (30)         // diameter of dpad
380  #else  #else
381  #define D_RAD  (OSM_GPS_MAP_OSD_DIAMETER)  #define D_RAD  (OSD_DIAMETER)
382  #endif  #endif
383  #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
384  #define D_LEN  (D_RAD/4)    // length of arrow  #define D_LEN  (D_RAD/4)    // length of arrow
# Line 102  osm_gps_map_osd_free(gpointer priv_ptr) Line 388  osm_gps_map_osd_free(gpointer priv_ptr)
388  #define Z_STEP   (D_RAD/4)  // distance between dpad and zoom  #define Z_STEP   (D_RAD/4)  // distance between dpad and zoom
389  #define Z_RAD    (D_RAD/2)  // radius of "caps" of zoom bar  #define Z_RAD    (D_RAD/2)  // radius of "caps" of zoom bar
390    
391    #ifdef OSD_SHADOW_ENABLE
392  /* shadow also depends on control size */  /* shadow also depends on control size */
393  #define OSD_SHADOW (D_RAD/6)  #define OSD_SHADOW (D_RAD/6)
394    #else
395    #define OSD_SHADOW (0)
396    #endif
397    
398    /* normally the GPS button is in the center of the dpad. if there's */
399    /* no dpad it will go into the zoom area */
400    #if defined(OSD_GPS_BUTTON) && defined(OSD_NO_DPAD)
401    #define Z_GPS  1
402    #else
403    #define Z_GPS  0
404    #endif
405    
406  /* total width and height of controls incl. shadow */  /* total width and height of controls incl. shadow */
407  #define OSD_W    (2*D_RAD + OSD_SHADOW)  #define OSD_W    (2*D_RAD + OSD_SHADOW + Z_GPS * 2 * Z_RAD)
408    #if !Z_GPS
409  #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)
410    #else
411    #define OSD_H    (2*Z_RAD + OSD_SHADOW)
412    #endif
413    
414    #ifdef OSD_SHADOW_ENABLE
415  #define OSD_LBL_SHADOW (OSD_SHADOW/2)  #define OSD_LBL_SHADOW (OSD_SHADOW/2)
416    #endif
417    
418    #define Z_TOP    ((1-Z_GPS) * (2 * D_RAD + Z_STEP))
419    
 #define Z_TOP    (2 * D_RAD + Z_STEP)  
420  #define Z_MID    (Z_TOP + Z_RAD)  #define Z_MID    (Z_TOP + Z_RAD)
421  #define Z_BOT    (Z_MID + Z_RAD)  #define Z_BOT    (Z_MID + Z_RAD)
422  #define Z_LEFT   (Z_RAD)  #define Z_LEFT   (Z_RAD)
423  #define Z_RIGHT  (2 * D_RAD - Z_RAD)  #define Z_RIGHT  (2 * D_RAD - Z_RAD + Z_GPS * 2 * Z_RAD)
424    #define Z_CENTER ((Z_RIGHT + Z_LEFT)/2)
425    
426  /* create the cairo shape used for the zoom buttons */  /* create the cairo shape used for the zoom buttons */
427  static void  static void
428  osm_gps_map_osd_zoom_shape(cairo_t *cr, gint x, gint y)  osd_zoom_shape(cairo_t *cr, gint x, gint y)
429  {  {
430      cairo_move_to (cr, x+Z_LEFT,    y+Z_TOP);      cairo_move_to (cr, x+Z_LEFT,    y+Z_TOP);
431      cairo_line_to (cr, x+Z_RIGHT,   y+Z_TOP);      cairo_line_to (cr, x+Z_RIGHT,   y+Z_TOP);
# Line 129  osm_gps_map_osd_zoom_shape(cairo_t *cr, Line 434  osm_gps_map_osd_zoom_shape(cairo_t *cr,
434      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);
435  }  }
436    
437    /* ------------------- color/shadow functions ----------------- */
438    
439    #ifndef OSD_COLOR
440    /* if no color has been specified we just use the gdks default colors */
441    static void
442    osd_labels(cairo_t *cr, gint width, gboolean enabled,
443                           GdkColor *fg, GdkColor *disabled) {
444        if(enabled)  gdk_cairo_set_source_color(cr, fg);
445        else         gdk_cairo_set_source_color(cr, disabled);
446        cairo_set_line_width (cr, width);
447    }
448    #else
449    static void
450    osd_labels(cairo_t *cr, gint width, gboolean enabled) {
451        if(enabled)  cairo_set_source_rgb (cr, OSD_COLOR);
452        else         cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);
453        cairo_set_line_width (cr, width);
454    }
455    #endif
456    
457    #ifdef OSD_SHADOW_ENABLE
458    static void
459    osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {
460        cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);
461        cairo_set_line_width (cr, width);
462    }
463    #endif
464    
465    #ifndef OSD_NO_DPAD
466  /* create the cairo shape used for the dpad */  /* create the cairo shape used for the dpad */
467  static void  static void
468  osm_gps_map_osd_dpad_shape(cairo_t *cr, gint x, gint y)  osd_dpad_shape(cairo_t *cr, gint x, gint y)
469  {  {
470      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);
471  }  }
472    #endif
473    
474    #ifdef OSD_SHADOW_ENABLE
475    static void
476    osd_shape_shadow(cairo_t *cr) {
477        cairo_set_source_rgba (cr, 0, 0, 0, 0.2);
478        cairo_fill (cr);
479        cairo_stroke (cr);
480    }
481    #endif
482    
483    #ifndef OSD_COLOR
484    /* if no color has been specified we just use the gdks default colors */
485    static void
486    osd_shape(cairo_t *cr, GdkColor *bg, GdkColor *fg) {
487        gdk_cairo_set_source_color(cr, bg);
488        cairo_fill_preserve (cr);
489        gdk_cairo_set_source_color(cr, fg);
490        cairo_set_line_width (cr, 1);
491        cairo_stroke (cr);
492    }
493    #else
494    static void
495    osd_shape(cairo_t *cr) {
496        cairo_set_source_rgb (cr, OSD_COLOR_BG);
497        cairo_fill_preserve (cr);
498        cairo_set_source_rgb (cr, OSD_COLOR);
499        cairo_set_line_width (cr, 1);
500        cairo_stroke (cr);
501    }
502    #endif
503    
504    
505  static gboolean  static gboolean
506  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)
# Line 142  osm_gps_map_in_circle(gint x, gint y, gi Line 508  osm_gps_map_in_circle(gint x, gint y, gi
508      return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);      return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);
509  }  }
510    
511    #ifndef OSD_NO_DPAD
512  /* check whether x/y is within the dpad */  /* check whether x/y is within the dpad */
513  static osd_button_t  static osd_button_t
514  osm_gps_map_osd_check_dpad(gint x, gint y)  osd_check_dpad(gint x, gint y)
515  {  {
516      /* within entire dpad circle */      /* within entire dpad circle */
517      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))
518      {      {
519          /* convert into position relative to dpads centre */          /* convert into position relative to dpads centre */
520          x -= (OSD_X + D_RAD);          x -= D_RAD;
521          y -= (OSD_Y + D_RAD);          y -= D_RAD;
522    
523    #ifdef OSD_GPS_BUTTON
524          /* check for dpad center goes here! */          /* check for dpad center goes here! */
525          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))
526              return OSD_GPS;              return OSD_GPS;
527    #endif
528    
529          if( y < 0 && abs(x) < abs(y))          if( y < 0 && abs(x) < abs(y))
530              return OSD_UP;              return OSD_UP;
# Line 173  osm_gps_map_osd_check_dpad(gint x, gint Line 542  osm_gps_map_osd_check_dpad(gint x, gint
542      }      }
543      return OSD_NONE;      return OSD_NONE;
544  }  }
545    #endif
546    
547  /* check whether x/y is within the zoom pads */  /* check whether x/y is within the zoom pads */
548  static osd_button_t  static osd_button_t
549  osm_gps_map_osd_check_zoom(gint x, gint y) {  osd_check_zoom(gint x, gint y) {
550      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) {
551    
552          /* within circle around (-) label */          /* within circle around (-) label */
553          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)  
554              return OSD_OUT;              return OSD_OUT;
555    
556          /* within circle around (+) label */          /* within circle around (+) label */
557          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))
558              return OSD_IN;              return OSD_IN;
559    
560    #if Z_GPS == 1
561            /* within square around center */
562            if( x > Z_CENTER - Z_RAD && x < Z_CENTER + Z_RAD)
563                return OSD_GPS;
564    #endif
565    
566            /* between center of (-) button and center of entire zoom control area */
567            if(x > OSD_LEFT && x < D_RAD)
568                return OSD_OUT;
569    
570          /* between center of (+) button and center of entire zoom control area */          /* between center of (+) button and center of entire zoom control area */
571          if(x < OSD_RIGHT && x > OSD_X + D_RAD)          if(x < OSD_RIGHT && x > D_RAD)
572              return OSD_IN;              return OSD_IN;
573      }      }
574    
575      return OSD_NONE;      return OSD_NONE;
576  }  }
577    
578  static osd_button_t  #ifdef OSD_SOURCE_SEL
 osm_gps_map_osd_check(gint x, gint y) {  
     osd_button_t but = OSD_NONE;  
579    
580      /* first do a rough test for the OSD area. */  /* place source selection at right border */
581      /* this is just to avoid an unnecessary detailed test */  #define OSD_S_RAD (Z_RAD)
582      if(x > OSD_X && x < OSD_X + OSD_W &&  #define OSD_S_X   (-OSD_X)
583         y > OSD_Y && y < OSD_Y + OSD_H) {  #define OSD_S_Y   (OSD_Y)
584          but = osm_gps_map_osd_check_dpad(x, y);  #define OSD_S_PW  (2 * Z_RAD)
585    #define OSD_S_W   (OSD_S_PW)
586    #define OSD_S_PH  (2 * Z_RAD)
587    #define OSD_S_H   (OSD_S_PH + OSD_SHADOW)
588    
589    /* size of usable area when expanded */
590    #define OSD_S_AREA_W (priv->source_sel.width)
591    #define OSD_S_AREA_H (priv->source_sel.height)
592    #define OSD_S_EXP_W  (OSD_S_PW + OSD_S_AREA_W + OSD_SHADOW)
593    #define OSD_S_EXP_H  (OSD_S_AREA_H + OSD_SHADOW)
594    
595    /* internal value to draw the arrow on the "puller" */
596    #define OSD_S_D0  (OSD_S_RAD/2)
597    #ifndef OSD_FONT_SIZE
598    #define OSD_FONT_SIZE 16.0
599    #endif
600    #define OSD_TEXT_BORDER   (OSD_FONT_SIZE/2)
601    #define OSD_TEXT_SKIP     (OSD_FONT_SIZE/8)
602    
603          if(but == OSD_NONE)  /* draw the shape of the source selection OSD, either only the puller (not expanded) */
604              but = osm_gps_map_osd_check_zoom(x, y);  /* or the entire menu incl. the puller (expanded) */
605    static void
606    osd_source_shape(osd_priv_t *priv, cairo_t *cr, gint x, gint y) {
607        if(!priv->source_sel.expanded) {
608            /* just draw the puller */
609            cairo_move_to (cr, x + OSD_S_PW, y + OSD_S_PH);
610            cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
611            cairo_line_to (cr, x + OSD_S_PW, y);
612        } else {
613            /* draw the puller and the area itself */
614            cairo_move_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y + OSD_S_AREA_H);
615            cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H);
616            if(OSD_S_Y > 0) {
617                cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_PH);
618                cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
619            } else {
620                cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_AREA_H-OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
621                cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H - OSD_S_PH);
622                cairo_line_to (cr, x + OSD_S_PW, y);
623            }
624            cairo_line_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y);
625            cairo_close_path (cr);
626      }      }
627    }
628    
629      return but;  static void
630    osd_source_content(osm_gps_map_osd_t *osd, cairo_t *cr, gint offset) {
631        osd_priv_t *priv = (osd_priv_t*)osd->priv;
632    
633        int py = offset + OSD_S_RAD - OSD_S_D0;
634    
635        if(!priv->source_sel.expanded) {
636            /* draw the "puller" open (<) arrow */
637            cairo_move_to (cr, offset + OSD_S_RAD + OSD_S_D0/2, py);
638            cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
639            cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
640        } else {
641            if(OSD_S_Y < 0)
642                py += OSD_S_AREA_H - OSD_S_PH;
643    
644            /* draw the "puller" close (>) arrow */
645            cairo_move_to (cr, offset + OSD_S_RAD - OSD_S_D0/2, py);
646            cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
647            cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
648            cairo_stroke(cr);
649    
650            /* don't draw a shadow for the text content */
651            if(offset == 1) {
652                gint source;
653                g_object_get(osd->widget, "map-source", &source, NULL);
654    
655                cairo_select_font_face (cr, "Sans",
656                                        CAIRO_FONT_SLANT_NORMAL,
657                                        CAIRO_FONT_WEIGHT_BOLD);
658                cairo_set_font_size (cr, OSD_FONT_SIZE);
659    
660                int i, step = (priv->source_sel.height - 2*OSD_TEXT_BORDER) /
661                    OSM_GPS_MAP_SOURCE_LAST;
662                for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
663                    cairo_text_extents_t extents;
664                    const char *src = osm_gps_map_source_get_friendly_name(i);
665                    cairo_text_extents (cr, src, &extents);
666    
667                    int x = offset + OSD_S_PW + OSD_TEXT_BORDER;
668                    int y = offset + step * (i-1) + OSD_TEXT_BORDER;
669    
670                    /* draw filled rectangle if selected */
671                    if(source == i) {
672                        cairo_rectangle(cr, x - OSD_TEXT_BORDER/2,
673                                        y - OSD_TEXT_SKIP,
674                                        priv->source_sel.width - OSD_TEXT_BORDER,
675                                        step + OSD_TEXT_SKIP);
676                        cairo_fill(cr);
677    
678                        /* temprarily draw with background color */
679    #ifndef OSD_COLOR
680                        GdkColor bg = osd->widget->style->bg[GTK_STATE_NORMAL];
681                        gdk_cairo_set_source_color(cr, &bg);
682    #else
683                        cairo_set_source_rgb (cr, OSD_COLOR_BG);
684    #endif
685                    }
686    
687                    cairo_move_to (cr, x, y + OSD_TEXT_SKIP - extents.y_bearing);
688                    cairo_show_text (cr, src);
689    
690                    /* restore color */
691                    if(source == i) {
692    #ifndef OSD_COLOR
693                        GdkColor fg = osd->widget->style->fg[GTK_STATE_NORMAL];
694                        gdk_cairo_set_source_color(cr, &fg);
695    #else
696                        cairo_set_source_rgb (cr, OSD_COLOR);
697    #endif
698                    }
699                }
700            }
701        }
702  }  }
703    
704  static void  static void
705  osm_gps_map_osd_shape_shadow(cairo_t *cr) {  osd_render_source_sel(osm_gps_map_osd_t *osd, gboolean force_rerender) {
706      cairo_set_source_rgba (cr, 0, 0, 0, 0.2);      osd_priv_t *priv = (osd_priv_t*)osd->priv;
707      cairo_fill (cr);  
708        if(priv->source_sel.rendered && !force_rerender)
709            return;
710    
711        priv->source_sel.rendered = TRUE;
712    
713    #ifndef OSD_COLOR
714        GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
715        GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
716        GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
717    #endif
718    
719        /* draw source selector */
720        cairo_t *cr = cairo_create(priv->source_sel.surface);
721        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
722        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
723        cairo_paint(cr);
724        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
725    
726    #ifdef OSD_SHADOW_ENABLE
727        osd_source_shape(priv, cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
728        osd_shape_shadow(cr);
729    #endif
730    
731        osd_source_shape(priv, cr, 1, 1);
732    #ifndef OSD_COLOR
733        osd_shape(cr, &bg, &fg);
734    #else
735        osd_shape(cr);
736    #endif
737    
738    #ifdef OSD_SHADOW_ENABLE
739        osd_labels_shadow(cr, Z_RAD/3, TRUE);
740        osd_source_content(osd, cr, 1+OSD_LBL_SHADOW);
741        cairo_stroke (cr);
742    #endif
743    #ifndef OSD_COLOR
744        osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
745    #else
746        osd_labels(cr, Z_RAD/3, TRUE);
747    #endif
748        osd_source_content(osd, cr, 1);
749      cairo_stroke (cr);      cairo_stroke (cr);
750    
751        cairo_destroy(cr);
752  }  }
753    
754  static void  /* re-allocate the buffer used to draw the menu. This is used */
755  osm_gps_map_osd_shape(cairo_t *cr) {  /* to collapse/expand the buffer */
756      cairo_set_source_rgb (cr, 1, 1, 1);  static void
757      cairo_fill_preserve (cr);  osd_source_reallocate(osm_gps_map_osd_t *osd) {
758      cairo_set_source_rgb (cr, OSD_COLOR);      osd_priv_t *priv = (osd_priv_t*)osd->priv;
759      cairo_set_line_width (cr, 1);  
760      cairo_stroke (cr);      /* re-allocate offscreen bitmap */
761        g_assert (priv->source_sel.surface);
762    
763        int w = OSD_S_W, h = OSD_S_H;
764        if(priv->source_sel.expanded) {
765            cairo_text_extents_t extents;
766    
767            /* determine content size */
768            cairo_t *cr = cairo_create(priv->source_sel.surface);
769            cairo_select_font_face (cr, "Sans",
770                                    CAIRO_FONT_SLANT_NORMAL,
771                                    CAIRO_FONT_WEIGHT_BOLD);
772            cairo_set_font_size (cr, OSD_FONT_SIZE);
773    
774            /* calculate menu size */
775            int i, max_h = 0, max_w = 0;
776            for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
777                const char *src = osm_gps_map_source_get_friendly_name(i);
778                cairo_text_extents (cr, src, &extents);
779    
780                if(extents.width > max_w) max_w = extents.width;
781                if(extents.height > max_h) max_h = extents.height;
782            }
783            cairo_destroy(cr);
784    
785            priv->source_sel.width  = max_w + 2*OSD_TEXT_BORDER;
786            priv->source_sel.height = OSM_GPS_MAP_SOURCE_LAST *
787                (max_h + 2*OSD_TEXT_SKIP) + 2*OSD_TEXT_BORDER;
788    
789            w = OSD_S_EXP_W;
790            h = OSD_S_EXP_H;
791        }
792    
793        cairo_surface_destroy(priv->source_sel.surface);
794        priv->source_sel.surface =
795            cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w+2, h+2);
796    
797        osd_render_source_sel(osd, TRUE);
798    }
799    
800    #define OSD_HZ      15
801    #define OSD_TIME    500
802    
803    static gboolean osd_source_animate(gpointer data) {
804        osm_gps_map_osd_t *osd = (osm_gps_map_osd_t*)data;
805        osd_priv_t *priv = (osd_priv_t*)osd->priv;
806        int diff = OSD_S_EXP_W - OSD_S_W - OSD_S_X;
807        gboolean done = FALSE;
808        priv->source_sel.count += priv->source_sel.dir;
809    
810        /* shifting in */
811        if(priv->source_sel.dir < 0) {
812            if(priv->source_sel.count <= 0) {
813                priv->source_sel.count = 0;
814                done = TRUE;
815            }
816        } else {
817            if(priv->source_sel.count >= 1000) {
818                priv->source_sel.expanded = FALSE;
819                osd_source_reallocate(osd);
820    
821                priv->source_sel.count = 1000;
822                done = TRUE;
823            }
824        }
825    
826    
827        /* count runs linearly from 0 to 1000, map this nicely onto a position */
828    
829        /* nice sinoid mapping */
830        float m = 0.5-cos(priv->source_sel.count * M_PI / 1000.0)/2;
831        priv->source_sel.shift =
832            (osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X) +
833            m * diff;
834    
835        /* make sure the screen is updated */
836        osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
837    
838        /* stop animation if done */
839        if(done)
840            priv->source_sel.handler_id = 0;
841    
842        return !done;
843  }  }
844    
845    /* switch between expand and collapse mode of source selection */
846  static void  static void
847  osm_gps_map_osd_dpad_labels(cairo_t *cr, gint x, gint y) {  osd_source_toggle(osm_gps_map_osd_t *osd)
848    {
849        osd_priv_t *priv = (osd_priv_t*)osd->priv;
850    
851        /* ignore clicks while animation is running */
852        if(priv->source_sel.handler_id)
853            return;
854    
855        /* expand immediately, collapse is handle at the end of the */
856        /* collapse animation */
857        if(!priv->source_sel.expanded) {
858            priv->source_sel.expanded = TRUE;
859            osd_source_reallocate(osd);
860    
861            priv->source_sel.count = 1000;
862            priv->source_sel.shift = osd->widget->allocation.width - OSD_S_W;
863            priv->source_sel.dir = -1000/OSD_HZ;
864        } else {
865            priv->source_sel.count =  0;
866            priv->source_sel.shift = osd->widget->allocation.width -
867                OSD_S_EXP_W + OSD_S_X;
868            priv->source_sel.dir = +1000/OSD_HZ;
869        }
870    
871        /* start timer to handle animation */
872        priv->source_sel.handler_id = gtk_timeout_add(OSD_TIME/OSD_HZ,
873                                                      osd_source_animate, osd);
874    }
875    
876    /* check if the user clicked inside the source selection area */
877    static osd_button_t
878    osd_source_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y) {
879        osd_priv_t *priv = (osd_priv_t*)osd->priv;
880    
881        if(!priv->source_sel.expanded)
882            x -= osd->widget->allocation.width - OSD_S_W;
883        else
884            x -= osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
885    
886        if(OSD_S_Y > 0)
887            y -= OSD_S_Y;
888        else
889            y -= osd->widget->allocation.height - OSD_S_PH + OSD_S_Y;
890    
891        /* within square around puller? */
892        if(y > 0 && y < OSD_S_PH && x > 0 && x < OSD_S_PW) {
893            /* really within puller shape? */
894            if(x > Z_RAD || osm_gps_map_in_circle(x, y, Z_RAD, Z_RAD, Z_RAD)) {
895                /* expand source selector */
896                if(down)
897                    osd_source_toggle(osd);
898    
899                /* tell upper layers that user clicked some background element */
900                /* of the OSD */
901                return OSD_BG;
902            }
903        }
904    
905        /* check for clicks into data area */
906        if(priv->source_sel.expanded && !priv->source_sel.handler_id) {
907            /* re-adjust from puller top to content top */
908            if(OSD_S_Y < 0)
909                y += OSD_S_EXP_H - OSD_S_PH;
910    
911            if(x > OSD_S_PW &&
912               x < OSD_S_PW + OSD_S_EXP_W &&
913               y > 0 &&
914               y < OSD_S_EXP_H) {
915    
916                int step = (priv->source_sel.height - 2*OSD_TEXT_BORDER)
917                    / OSM_GPS_MAP_SOURCE_LAST;
918    
919                y -= OSD_TEXT_BORDER - OSD_TEXT_SKIP;
920                y /= step;
921                y += 1;
922    
923                if(down) {
924                    gint old = 0;
925                    g_object_get(osd->widget, "map-source", &old, NULL);
926    
927                    if(y > OSM_GPS_MAP_SOURCE_NULL &&
928                       y <= OSM_GPS_MAP_SOURCE_LAST &&
929                       old != y) {
930                        g_object_set(osd->widget, "map-source", y, NULL);
931    
932                        osd_render_source_sel(osd, TRUE);
933                        osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
934                    }
935                }
936    
937                /* return "clicked in OSD background" to prevent further */
938                /* processing by application */
939                return OSD_BG;
940            }
941        }
942    
943        return OSD_NONE;
944    }
945    #endif // OSD_SOURCE_SEL
946    
947    static osd_button_t
948    osd_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y) {
949        osd_button_t but = OSD_NONE;
950    
951    #ifdef OSD_BALLOON
952        if(down) {
953            /* needed to handle balloons that are created at click */
954            osd_priv_t *priv = (osd_priv_t*)osd->priv;
955            priv->balloon.just_created = FALSE;
956        }
957    #endif
958    
959    #ifdef OSD_SOURCE_SEL
960        /* the source selection area is handles internally */
961        but = osd_source_check(osd, down, x, y);
962    #endif
963    
964        if(but == OSD_NONE) {
965            gint mx = x - OSD_X;
966            gint my = y - OSD_Y;
967    
968            if(OSD_X < 0)
969                mx -= (osd->widget->allocation.width - OSD_W);
970    
971            if(OSD_Y < 0)
972                my -= (osd->widget->allocation.height - OSD_H);
973    
974            /* first do a rough test for the OSD area. */
975            /* this is just to avoid an unnecessary detailed test */
976            if(mx > 0 && mx < OSD_W && my > 0 && my < OSD_H) {
977    #ifndef OSD_NO_DPAD
978                but = osd_check_dpad(mx, my);
979    #endif
980            }
981    
982            if(but == OSD_NONE)
983                but = osd_check_zoom(mx, my);
984        }
985    
986    #ifdef OSD_BALLOON
987        if(but == OSD_NONE) {
988            /* check if user clicked into balloon */
989            if(osd_balloon_check(osd, down, x, y))
990                but = OSD_BG;
991        }
992    #endif
993    
994        return but;
995    }
996    
997    #ifndef OSD_NO_DPAD
998    static void
999    osd_dpad_labels(cairo_t *cr, gint x, gint y) {
1000      /* move reference to dpad center */      /* move reference to dpad center */
1001      x += D_RAD;      x += D_RAD;
1002      y += D_RAD;      y += D_RAD;
# Line 256  osm_gps_map_osd_dpad_labels(cairo_t *cr, Line 1019  osm_gps_map_osd_dpad_labels(cairo_t *cr,
1019          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]);
1020      }      }
1021  }  }
1022    #endif
1023    
1024  /* draw the sattelite dish icon in the center of the dpad */  #ifdef OSD_GPS_BUTTON
1025  #define GPS_V0  (D_RAD/8)  /* draw the satellite dish icon in the center of the dpad */
1026    #define GPS_V0  (D_RAD/7)
1027  #define GPS_V1  (D_RAD/10)  #define GPS_V1  (D_RAD/10)
1028  #define GPS_V2  (D_RAD/5)  #define GPS_V2  (D_RAD/5)
1029    
1030  /* draw a satellite receiver dish */  /* draw a satellite receiver dish */
1031    /* this is either drawn in the center of the dpad (if present) */
1032    /* or in the middle of the zoom area */
1033  static void  static void
1034  osm_gps_map_osd_dpad_gps(cairo_t *cr, gint x, gint y) {  osd_dpad_gps(cairo_t *cr, gint x, gint y) {
1035      /* move reference to dpad center */      /* move reference to dpad center */
1036      x += D_RAD;      x += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD * 3;
1037      y += D_RAD + GPS_V0;      y += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD + GPS_V0;
1038    
1039      cairo_move_to (cr, x-GPS_V0, y+GPS_V0);      cairo_move_to (cr, x-GPS_V0, y+GPS_V0);
1040      cairo_rel_line_to (cr, +GPS_V0, -GPS_V0);      cairo_rel_line_to (cr, +GPS_V0, -GPS_V0);
# Line 282  osm_gps_map_osd_dpad_gps(cairo_t *cr, gi Line 1049  osm_gps_map_osd_dpad_gps(cairo_t *cr, gi
1049      cairo_move_to (cr, x, y-GPS_V2);      cairo_move_to (cr, x, y-GPS_V2);
1050      cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);      cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);
1051  }  }
1052    #endif
1053    
1054  #define Z_LEN  (2*Z_RAD/3)  #define Z_LEN  (2*Z_RAD/3)
1055    
1056  static void  static void
1057  osm_gps_map_osd_zoom_labels(cairo_t *cr, gint x, gint y) {  osd_zoom_labels(cairo_t *cr, gint x, gint y) {
1058      cairo_move_to (cr, x + Z_LEFT  - Z_LEN, y + Z_MID);      cairo_move_to (cr, x + Z_LEFT  - Z_LEN, y + Z_MID);
1059      cairo_line_to (cr, x + Z_LEFT  + Z_LEN, y + Z_MID);      cairo_line_to (cr, x + Z_LEFT  + Z_LEN, y + Z_MID);
1060    
# Line 296  osm_gps_map_osd_zoom_labels(cairo_t *cr, Line 1064  osm_gps_map_osd_zoom_labels(cairo_t *cr,
1064      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);
1065  }  }
1066    
1067    #ifdef OSD_COORDINATES
1068    
1069    #ifndef OSD_COORDINATES_FONT_SIZE
1070    #define OSD_COORDINATES_FONT_SIZE 12
1071    #endif
1072    
1073    #define OSD_COORDINATES_OFFSET (OSD_COORDINATES_FONT_SIZE/6)
1074    
1075    #define OSD_COORDINATES_W  (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET)
1076    #define OSD_COORDINATES_H  (2*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET+OSD_COORDINATES_FONT_SIZE/4)
1077    
1078    /* these can be overwritten with versions that support */
1079    /* localization */
1080    #ifndef OSD_COORDINATES_CHR_N
1081    #define OSD_COORDINATES_CHR_N  "N"
1082    #endif
1083    #ifndef OSD_COORDINATES_CHR_S
1084    #define OSD_COORDINATES_CHR_S  "S"
1085    #endif
1086    #ifndef OSD_COORDINATES_CHR_E
1087    #define OSD_COORDINATES_CHR_E  "E"
1088    #endif
1089    #ifndef OSD_COORDINATES_CHR_W
1090    #define OSD_COORDINATES_CHR_W  "W"
1091    #endif
1092    
1093    
1094    
1095    /* this is the classic geocaching notation */
1096    static char
1097    *osd_latitude_str(float latitude) {
1098        char *c = OSD_COORDINATES_CHR_N;
1099        float integral, fractional;
1100    
1101        if(isnan(latitude))
1102            return NULL;
1103    
1104        if(latitude < 0) {
1105            latitude = fabs(latitude);
1106            c = OSD_COORDINATES_CHR_S;
1107        }
1108    
1109        fractional = modff(latitude, &integral);
1110    
1111        return g_strdup_printf("%s %02d° %06.3f'",
1112                               c, (int)integral, fractional*60.0);
1113    }
1114    
1115    static char
1116    *osd_longitude_str(float longitude) {
1117        char *c = OSD_COORDINATES_CHR_E;
1118        float integral, fractional;
1119    
1120        if(isnan(longitude))
1121            return NULL;
1122    
1123        if(longitude < 0) {
1124            longitude = fabs(longitude);
1125            c = OSD_COORDINATES_CHR_W;
1126        }
1127    
1128        fractional = modff(longitude, &integral);
1129    
1130        return g_strdup_printf("%s %03d° %06.3f'",
1131                               c, (int)integral, fractional*60.0);
1132    }
1133    
1134    /* render a string at the given screen position */
1135    static int
1136    osd_render_centered_text(cairo_t *cr, int y, int width, char *text) {
1137        char *p = g_strdup(text);
1138        cairo_text_extents_t extents;
1139        cairo_text_extents (cr, p, &extents);
1140    
1141        /* check if text needs to be truncated */
1142        int len = strlen(text)-2;
1143        while(extents.width > width) {
1144            len--;
1145            strcpy(p+len, "...");
1146            cairo_text_extents (cr, p, &extents);
1147        }
1148    
1149        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
1150        cairo_set_line_width (cr, OSD_COORDINATES_FONT_SIZE/6);
1151        cairo_move_to (cr, (width - extents.width)/2, y - extents.y_bearing);
1152        cairo_text_path (cr, p);
1153        cairo_stroke (cr);
1154    
1155        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
1156        cairo_move_to (cr, (width - extents.width)/2, y - extents.y_bearing);
1157        cairo_show_text (cr, p);
1158    
1159        g_free(p);
1160    
1161        /* skip + 1/4 line */
1162        return y + 5*OSD_COORDINATES_FONT_SIZE/4;
1163    }
1164    
1165  static void  static void
1166  osm_gps_map_osd_labels(cairo_t *cr, gint width, gboolean enabled) {  osd_render_coordinates(osm_gps_map_osd_t *osd)
1167      if(enabled)  cairo_set_source_rgb (cr, OSD_COLOR);  {
1168      else         cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);      osd_priv_t *priv = (osd_priv_t*)osd->priv;
1169      cairo_set_line_width (cr, width);  
1170        /* get current map position */
1171        gfloat lat, lon;
1172        g_object_get(osd->widget, "latitude", &lat, "longitude", &lon, NULL);
1173    
1174        /* check if position has changed enough to require redraw */
1175        if(!isnan(priv->coordinates.lat) && !isnan(priv->coordinates.lon))
1176            /* 1/60000 == 1/1000 minute */
1177            if((fabsf(lat - priv->coordinates.lat) < 1/60000) &&
1178               (fabsf(lon - priv->coordinates.lon) < 1/60000))
1179                return;
1180    
1181        priv->coordinates.lat = lat;
1182        priv->coordinates.lon = lon;
1183    
1184        /* first fill with transparency */
1185        cairo_t *cr = cairo_create(priv->coordinates.surface);
1186        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1187        //    cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 0.5);
1188        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
1189        cairo_paint(cr);
1190        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1191    
1192        cairo_select_font_face (cr, "Sans",
1193                                CAIRO_FONT_SLANT_NORMAL,
1194                                CAIRO_FONT_WEIGHT_BOLD);
1195        cairo_set_font_size (cr, OSD_COORDINATES_FONT_SIZE);
1196    
1197        char *latitude = osd_latitude_str(lat);
1198        char *longitude = osd_longitude_str(lon);
1199    
1200        int y = OSD_COORDINATES_OFFSET;
1201        y = osd_render_centered_text(cr, y, OSD_COORDINATES_W, latitude);
1202        y = osd_render_centered_text(cr, y, OSD_COORDINATES_W, longitude);
1203    
1204        g_free(latitude);
1205        g_free(longitude);
1206    
1207        cairo_destroy(cr);
1208    }
1209    #endif  // OSD_COORDINATES
1210    
1211    #ifdef OSD_NAV
1212    #define OSD_NAV_W  (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET)
1213    #define OSD_NAV_H  (11*OSD_COORDINATES_FONT_SIZE)
1214    
1215    /* http://mathforum.org/library/drmath/view/55417.html */
1216    static float get_bearing(float lat1, float lon1, float lat2, float lon2) {
1217      return atan2( sin(lon2 - lon1) * cos(lat2),
1218                    cos(lat1) * sin(lat2) -
1219                    sin(lat1) * cos(lat2) * cos(lon2 - lon1));
1220    }
1221    
1222    /* http://mathforum.org/library/drmath/view/51722.html */
1223    static float get_distance(float lat1, float lon1, float lat2, float lon2) {
1224      float aob = acos(cos(lat1) * cos(lat2) * cos(lon2 - lon1) +
1225                       sin(lat1) * sin(lat2));
1226    
1227      //  return(aob * 3959.0);   /* great circle radius in miles */
1228    
1229      return(aob * 6371000.0);     /* great circle radius in meters */
1230    }
1231    
1232    static void
1233    osd_render_nav(osm_gps_map_osd_t *osd)
1234    {
1235        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1236    
1237        if(!priv->nav.surface || isnan(priv->nav.lat) || isnan(priv->nav.lon))
1238            return;
1239    
1240        /* first fill with transparency */
1241        cairo_t *cr = cairo_create(priv->nav.surface);
1242        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1243        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
1244        cairo_paint(cr);
1245        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1246    
1247        cairo_select_font_face (cr, "Sans",
1248                                CAIRO_FONT_SLANT_NORMAL,
1249                                CAIRO_FONT_WEIGHT_BOLD);
1250        cairo_set_font_size (cr, OSD_COORDINATES_FONT_SIZE);
1251    
1252        char *latitude = osd_latitude_str(priv->nav.lat);
1253        char *longitude = osd_longitude_str(priv->nav.lon);
1254    
1255        int y = OSD_COORDINATES_OFFSET;
1256        y = osd_render_centered_text(cr, y, OSD_NAV_W, priv->nav.name);
1257        y = osd_render_centered_text(cr, y, OSD_NAV_W, latitude);
1258        y = osd_render_centered_text(cr, y, OSD_NAV_W, longitude);
1259    
1260        g_free(latitude);
1261        g_free(longitude);
1262    
1263        /* draw the compass */
1264        int radius = (OSD_NAV_H - y - 5*OSD_COORDINATES_FONT_SIZE/4)/2;
1265        if(radius > OSD_NAV_W/2)
1266            radius = OSD_NAV_W/2;
1267    
1268        int x = OSD_NAV_W/2+1;
1269        y += radius;
1270    
1271      cairo_stroke (cr);      cairo_stroke (cr);
1272    
1273        /* draw background */
1274        cairo_arc(cr, x, y, radius, 0,  2*M_PI);
1275        cairo_set_source_rgba (cr, 1, 1, 1, 0.5);
1276        cairo_fill_preserve (cr);
1277        cairo_set_source_rgb (cr, 0, 0, 0);
1278        cairo_set_line_width (cr, 1);
1279        cairo_stroke (cr);
1280    
1281        /* draw pointer */
1282    #define ARROW_WIDTH     0.3
1283    #define ARROW_LENGTH    0.7
1284    
1285        coord_t *gps = osm_gps_map_get_gps (OSM_GPS_MAP(osd->widget));
1286        if(gps) {
1287            float arot = get_bearing(gps->rlat, gps->rlon,
1288                         deg2rad(priv->nav.lat), deg2rad(priv->nav.lon));
1289    
1290            cairo_move_to(cr,
1291                          x + radius *  ARROW_LENGTH *  sin(arot),
1292                          y + radius *  ARROW_LENGTH * -cos(arot));
1293    
1294            cairo_line_to(cr,
1295                          x + radius * -ARROW_LENGTH *  sin(arot+ARROW_WIDTH),
1296                          y + radius * -ARROW_LENGTH * -cos(arot+ARROW_WIDTH));
1297    
1298            cairo_line_to(cr,
1299                          x + radius * -0.5 * ARROW_LENGTH *  sin(arot),
1300                          y + radius * -0.5 * ARROW_LENGTH * -cos(arot));
1301    
1302            cairo_line_to(cr,
1303                          x + radius * -ARROW_LENGTH *  sin(arot-ARROW_WIDTH),
1304                          y + radius * -ARROW_LENGTH * -cos(arot-ARROW_WIDTH));
1305    
1306            cairo_close_path(cr);
1307            cairo_set_source_rgb (cr, 0, 0, 0);
1308            cairo_fill (cr);
1309    
1310            y += radius + OSD_COORDINATES_FONT_SIZE/4;
1311    
1312            float dist = get_distance(gps->rlat, gps->rlon,
1313                            deg2rad(priv->nav.lat), deg2rad(priv->nav.lon));
1314    
1315            char *dist_str = NULL;
1316            if(!priv->nav.imperial) {
1317                /* metric is easy ... */
1318                if(dist<1000)
1319                    dist_str = g_strdup_printf("%u m", (int)dist);
1320                else
1321                    dist_str = g_strdup_printf("%.1f km", dist/1000);
1322            } else {
1323                /* and now the hard part: scale for useful imperial values :-( */
1324                /* try to convert to feet, 1ft == 0.3048 m */
1325    
1326                if(dist/(3*0.3048) >= 1760.0)      /* more than 1760 yard? */
1327                    dist_str = g_strdup_printf("%.1f mi", dist/(0.3048*3*1760.0));
1328                else if(dist/0.3048 >= 100)        /* more than 100 feet? */
1329                    dist_str = g_strdup_printf("%.1f yd", dist/(0.3048*3));
1330                else
1331                    dist_str = g_strdup_printf("%.0f ft", dist/0.3048);
1332            }
1333    
1334            y = osd_render_centered_text(cr, y, OSD_NAV_W, dist_str);
1335            g_free(dist_str);
1336        }
1337    
1338        cairo_destroy(cr);
1339  }  }
1340    
1341  static void  void osm_gps_map_osd_clear_nav (OsmGpsMap *map) {
1342  osm_gps_map_osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {      g_return_if_fail (OSM_IS_GPS_MAP (map));
1343      cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);  
1344      cairo_set_line_width (cr, width);      osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1345        g_return_if_fail (osd);
1346    
1347        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1348        g_return_if_fail (priv);
1349    
1350        if(priv->nav.surface) {
1351            cairo_surface_destroy(priv->nav.surface);
1352            priv->nav.surface = NULL;
1353            priv->nav.lat = OSM_GPS_MAP_INVALID;
1354            priv->nav.lon = OSM_GPS_MAP_INVALID;
1355            if(priv->nav.name) g_free(priv->nav.name);
1356        }
1357        osm_gps_map_redraw(map);
1358    }
1359    
1360    void
1361    osm_gps_map_osd_draw_nav (OsmGpsMap *map, gboolean imperial,
1362                              float latitude, float longitude, char *name) {
1363        g_return_if_fail (OSM_IS_GPS_MAP (map));
1364    
1365        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1366        g_return_if_fail (osd);
1367    
1368        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1369        g_return_if_fail (priv);
1370    
1371        osm_gps_map_osd_clear_nav (map);
1372    
1373        /* allocate balloon surface */
1374        priv->nav.surface =
1375            cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1376                                       OSD_NAV_W+2, OSD_NAV_H+2);
1377    
1378        priv->nav.lat = latitude;
1379        priv->nav.lon = longitude;
1380        priv->nav.name = g_strdup(name);
1381        priv->nav.imperial = imperial;
1382    
1383        osd_render_nav(osd);
1384    
1385        osm_gps_map_redraw(map);
1386    }
1387    
1388    #endif // OSD_NAV
1389    
1390    
1391    #ifdef OSD_CROSSHAIR
1392    
1393    #ifndef OSD_CROSSHAIR_RADIUS
1394    #define OSD_CROSSHAIR_RADIUS 10
1395    #endif
1396    
1397    #define OSD_CROSSHAIR_TICK  (OSD_CROSSHAIR_RADIUS/2)
1398    #define OSD_CROSSHAIR_BORDER (OSD_CROSSHAIR_TICK + OSD_CROSSHAIR_RADIUS/4)
1399    #define OSD_CROSSHAIR_W  ((OSD_CROSSHAIR_RADIUS+OSD_CROSSHAIR_BORDER)*2)
1400    #define OSD_CROSSHAIR_H  ((OSD_CROSSHAIR_RADIUS+OSD_CROSSHAIR_BORDER)*2)
1401    
1402    static void
1403    osd_render_crosshair_shape(cairo_t *cr) {
1404        cairo_arc (cr, OSD_CROSSHAIR_W/2, OSD_CROSSHAIR_H/2,
1405                   OSD_CROSSHAIR_RADIUS, 0,  2*M_PI);
1406    
1407        cairo_move_to (cr, OSD_CROSSHAIR_W/2 - OSD_CROSSHAIR_RADIUS,
1408                       OSD_CROSSHAIR_H/2);
1409        cairo_rel_line_to (cr, -OSD_CROSSHAIR_TICK, 0);
1410        cairo_move_to (cr, OSD_CROSSHAIR_W/2 + OSD_CROSSHAIR_RADIUS,
1411                       OSD_CROSSHAIR_H/2);
1412        cairo_rel_line_to (cr,  OSD_CROSSHAIR_TICK, 0);
1413    
1414        cairo_move_to (cr, OSD_CROSSHAIR_W/2,
1415                       OSD_CROSSHAIR_H/2 - OSD_CROSSHAIR_RADIUS);
1416        cairo_rel_line_to (cr, 0, -OSD_CROSSHAIR_TICK);
1417        cairo_move_to (cr, OSD_CROSSHAIR_W/2,
1418                       OSD_CROSSHAIR_H/2 + OSD_CROSSHAIR_RADIUS);
1419        cairo_rel_line_to (cr, 0, OSD_CROSSHAIR_TICK);
1420    
1421      cairo_stroke (cr);      cairo_stroke (cr);
1422  }  }
1423    
1424  static void  static void
1425  osm_gps_map_osd_render(OsmGpsMapPrivate *priv) {  osd_render_crosshair(osm_gps_map_osd_t *osd)
1426    {
1427        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1428    
1429        if(priv->crosshair.rendered)
1430            return;
1431    
1432        priv->crosshair.rendered = TRUE;
1433    
1434      /* first fill with transparency */      /* first fill with transparency */
1435      cairo_t *cr = cairo_create(priv->osd.overlay);      cairo_t *cr = cairo_create(priv->crosshair.surface);
1436        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1437        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
1438        cairo_paint(cr);
1439        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1440    
1441        cairo_set_line_cap  (cr, CAIRO_LINE_CAP_ROUND);
1442    
1443        cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.5);
1444        cairo_set_line_width (cr, OSD_CROSSHAIR_RADIUS/2);
1445        osd_render_crosshair_shape(cr);
1446    
1447        cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.5);
1448        cairo_set_line_width (cr, OSD_CROSSHAIR_RADIUS/4);
1449        osd_render_crosshair_shape(cr);
1450    
1451        cairo_destroy(cr);
1452    }
1453    #endif
1454    
1455    #ifdef OSD_SCALE
1456    
1457    #ifndef OSD_SCALE_FONT_SIZE
1458    #define OSD_SCALE_FONT_SIZE 12
1459    #endif
1460    #define OSD_SCALE_W   (10*OSD_SCALE_FONT_SIZE)
1461    #define OSD_SCALE_H   (5*OSD_SCALE_FONT_SIZE/2)
1462    
1463    /* various parameters used to create the scale */
1464    #define OSD_SCALE_H2   (OSD_SCALE_H/2)
1465    #define OSD_SCALE_TICK (2*OSD_SCALE_FONT_SIZE/3)
1466    #define OSD_SCALE_M    (OSD_SCALE_H2 - OSD_SCALE_TICK)
1467    #define OSD_SCALE_I    (OSD_SCALE_H2 + OSD_SCALE_TICK)
1468    #define OSD_SCALE_FD   (OSD_SCALE_FONT_SIZE/4)
1469    
1470    static void
1471    osd_render_scale(osm_gps_map_osd_t *osd)
1472    {
1473        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1474    
1475        /* this only needs to be rendered if the zoom has changed */
1476        gint zoom;
1477        g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);
1478        if(zoom == priv->scale.zoom)
1479            return;
1480    
1481        priv->scale.zoom = zoom;
1482    
1483        float m_per_pix = osm_gps_map_get_scale(OSM_GPS_MAP(osd->widget));
1484    
1485        /* first fill with transparency */
1486        cairo_t *cr = cairo_create(priv->scale.surface);
1487      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1488      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);
1489        // pink for testing:    cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2);
1490      cairo_paint(cr);      cairo_paint(cr);
1491        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1492    
1493        /* determine the size of the scale width in meters */
1494        float width = (OSD_SCALE_W-OSD_SCALE_FONT_SIZE/6) * m_per_pix;
1495    
1496        /* scale this to useful values */
1497        int exp = logf(width)*M_LOG10E;
1498        int mant = width/pow(10,exp);
1499        int width_metric = mant * pow(10,exp);
1500        char *dist_str = NULL;
1501        if(width_metric<1000)
1502            dist_str = g_strdup_printf("%u m", width_metric);
1503        else
1504            dist_str = g_strdup_printf("%u km", width_metric/1000);
1505        width_metric /= m_per_pix;
1506    
1507        /* and now the hard part: scale for useful imperial values :-( */
1508        /* try to convert to feet, 1ft == 0.3048 m */
1509        width /= 0.3048;
1510        float imp_scale = 0.3048;
1511        char *dist_imp_unit = "ft";
1512    
1513        if(width >= 100) {
1514            /* 1yd == 3 feet */
1515            width /= 3.0;
1516            imp_scale *= 3.0;
1517            dist_imp_unit = "yd";
1518    
1519            if(width >= 1760.0) {
1520                /* 1mi == 1760 yd */
1521                width /= 1760.0;
1522                imp_scale *= 1760.0;
1523                dist_imp_unit = "mi";
1524            }
1525        }
1526    
1527        /* also convert this to full tens/hundreds */
1528        exp = logf(width)*M_LOG10E;
1529        mant = width/pow(10,exp);
1530        int width_imp = mant * pow(10,exp);
1531        char *dist_str_imp = g_strdup_printf("%u %s", width_imp, dist_imp_unit);
1532    
1533        /* convert back to pixels */
1534        width_imp *= imp_scale;
1535        width_imp /= m_per_pix;
1536    
1537        cairo_select_font_face (cr, "Sans",
1538                                CAIRO_FONT_SLANT_NORMAL,
1539                                CAIRO_FONT_WEIGHT_BOLD);
1540        cairo_set_font_size (cr, OSD_SCALE_FONT_SIZE);
1541        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
1542    
1543        cairo_text_extents_t extents;
1544        cairo_text_extents (cr, dist_str, &extents);
1545    
1546        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
1547        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6);
1548        cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD);
1549        cairo_text_path (cr, dist_str);
1550        cairo_stroke (cr);
1551        cairo_move_to (cr, 2*OSD_SCALE_FD,
1552                       OSD_SCALE_H2+OSD_SCALE_FD + extents.height);
1553        cairo_text_path (cr, dist_str_imp);
1554        cairo_stroke (cr);
1555    
1556        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
1557        cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD);
1558        cairo_show_text (cr, dist_str);
1559        cairo_move_to (cr, 2*OSD_SCALE_FD,
1560                       OSD_SCALE_H2+OSD_SCALE_FD + extents.height);
1561        cairo_show_text (cr, dist_str_imp);
1562    
1563        g_free(dist_str);
1564        g_free(dist_str_imp);
1565    
1566        /* draw white line */
1567        cairo_set_line_cap  (cr, CAIRO_LINE_CAP_ROUND);
1568        cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);
1569        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/3);
1570        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M);
1571        cairo_rel_line_to (cr, 0,  OSD_SCALE_TICK);
1572        cairo_rel_line_to (cr, width_metric, 0);
1573        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1574        cairo_stroke(cr);
1575        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I);
1576        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1577        cairo_rel_line_to (cr, width_imp, 0);
1578        cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK);
1579        cairo_stroke(cr);
1580    
1581        /* draw black line */
1582        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
1583        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6);
1584        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M);
1585        cairo_rel_line_to (cr, 0,  OSD_SCALE_TICK);
1586        cairo_rel_line_to (cr, width_metric, 0);
1587        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1588        cairo_stroke(cr);
1589        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I);
1590        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1591        cairo_rel_line_to (cr, width_imp, 0);
1592        cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK);
1593        cairo_stroke(cr);
1594    
1595        cairo_destroy(cr);
1596    }
1597    #endif
1598    
1599    static void
1600    osd_render_controls(osm_gps_map_osd_t *osd)
1601    {
1602        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1603    
1604        if(priv->controls.rendered
1605    #ifdef OSD_GPS_BUTTON
1606           && (priv->controls.gps_enabled == (osd->cb != NULL))
1607    #endif
1608           )
1609            return;
1610    
1611    #ifdef OSD_GPS_BUTTON
1612        priv->controls.gps_enabled = (osd->cb != NULL);
1613    #endif
1614        priv->controls.rendered = TRUE;
1615    
1616    #ifndef OSD_COLOR
1617        GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
1618        GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
1619        GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
1620    #endif
1621    
1622        /* first fill with transparency */
1623        cairo_t *cr = cairo_create(priv->controls.surface);
1624        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1625        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
1626        cairo_paint(cr);
1627      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1628    
1629      /* --------- draw zoom and dpad shape shadow ----------- */      /* --------- draw zoom and dpad shape shadow ----------- */
1630      gint x = 0, y = 0;  #ifdef OSD_SHADOW_ENABLE
1631        osd_zoom_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
1632      osm_gps_map_osd_zoom_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);      osd_shape_shadow(cr);
1633      osm_gps_map_osd_shape_shadow(cr);  #ifndef OSD_NO_DPAD
1634      osm_gps_map_osd_dpad_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);      osd_dpad_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
1635      osm_gps_map_osd_shape_shadow(cr);      osd_shape_shadow(cr);
1636    #endif
1637    #endif
1638    
1639      /* --------- draw zoom and dpad shape ----------- */      /* --------- draw zoom and dpad shape ----------- */
1640    
1641      osm_gps_map_osd_zoom_shape(cr, x, y);      osd_zoom_shape(cr, 1, 1);
1642      osm_gps_map_osd_shape(cr);  #ifndef OSD_COLOR
1643      osm_gps_map_osd_dpad_shape(cr, x, y);      osd_shape(cr, &bg, &fg);
1644      osm_gps_map_osd_shape(cr);  #else
1645        osd_shape(cr);
1646    #endif
1647    #ifndef OSD_NO_DPAD
1648        osd_dpad_shape(cr, 1, 1);
1649    #ifndef OSD_COLOR
1650        osd_shape(cr, &bg, &fg);
1651    #else
1652        osd_shape(cr);
1653    #endif
1654    #endif
1655    
1656      /* --------- draw zoom and dpad labels --------- */      /* --------- draw zoom and dpad labels --------- */
1657    
1658      osm_gps_map_osd_zoom_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);  #ifdef OSD_SHADOW_ENABLE
1659      osm_gps_map_osd_dpad_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);      osd_labels_shadow(cr, Z_RAD/3, TRUE);
1660      osm_gps_map_osd_labels_shadow(cr, Z_RAD/3, TRUE);      osd_zoom_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
1661      osm_gps_map_osd_dpad_gps(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);  #ifndef OSD_NO_DPAD
1662      osm_gps_map_osd_labels_shadow(cr, Z_RAD/6, priv->osd.cb != NULL);      osd_dpad_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
1663    #endif
1664      osm_gps_map_osd_zoom_labels(cr, x, y);      cairo_stroke(cr);
1665      osm_gps_map_osd_dpad_labels(cr, x, y);  #ifdef OSD_GPS_BUTTON
1666      osm_gps_map_osd_labels(cr, Z_RAD/3, TRUE);      osd_labels_shadow(cr, Z_RAD/6, osd->cb != NULL);
1667      osm_gps_map_osd_dpad_gps(cr, x, y);      osd_dpad_gps(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
1668      osm_gps_map_osd_labels(cr, Z_RAD/6, priv->osd.cb != NULL);      cairo_stroke(cr);
1669    #endif
1670    #endif
1671    
1672    #ifndef OSD_COLOR
1673        osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
1674    #else
1675        osd_labels(cr, Z_RAD/3, TRUE);
1676    #endif
1677        osd_zoom_labels(cr, 1, 1);
1678    #ifndef OSD_NO_DPAD
1679        osd_dpad_labels(cr, 1, 1);
1680    #endif
1681        cairo_stroke(cr);
1682    
1683    #ifndef OSD_COLOR
1684        osd_labels(cr, Z_RAD/6, osd->cb != NULL, &fg, &da);
1685    #else
1686        osd_labels(cr, Z_RAD/6, osd->cb != NULL);
1687    #endif
1688    #ifdef OSD_GPS_BUTTON
1689        osd_dpad_gps(cr, 1, 1);
1690    #endif
1691        cairo_stroke(cr);
1692    
1693      cairo_destroy(cr);      cairo_destroy(cr);
1694  }  }
1695    
1696  static void  static void
1697  osm_gps_map_osd_draw_controls (OsmGpsMap *map, gint xoffset, gint yoffset)  osd_render(osm_gps_map_osd_t *osd)
1698  {  {
1699      OsmGpsMapPrivate *priv = map->priv;      /* this function is actually called pretty often since the */
1700        /* OSD contents may have changed (due to a coordinate/zoom change). */
1701        /* The different OSD parts have to make sure that they don't */
1702        /* render unneccessarily often and thus waste CPU power */
1703    
1704        osd_render_controls(osd);
1705    
1706    #ifdef OSD_SOURCE_SEL
1707        osd_render_source_sel(osd, FALSE);
1708    #endif
1709    
1710      /* backup previous contents */  #ifdef OSD_SCALE
1711      if(!priv->osd.backup)      osd_render_scale(osd);
1712          priv->osd.backup = gdk_pixmap_new(priv->pixmap, OSD_W+2, OSD_H+2, -1);  #endif
1713    
1714    #ifdef OSD_CROSSHAIR
1715        osd_render_crosshair(osd);
1716    #endif
1717    
1718      gint x = OSD_X + EXTRA_BORDER + xoffset;  #ifdef OSD_NAV
1719      gint y = OSD_Y + EXTRA_BORDER + yoffset;      osd_render_nav(osd);
1720    #endif
1721    
1722      /* create backup of background */  #ifdef OSD_COORDINATES
1723      gdk_draw_drawable(priv->osd.backup,      osd_render_coordinates(osd);
1724          GTK_WIDGET(map)->style->fg_gc[GTK_WIDGET_STATE(GTK_WIDGET(map))],  #endif
1725                        priv->pixmap, x-1, y-1, 0, 0, OSD_W+2, OSD_H+2);  }
1726    
1727      priv->osd.backup_x = x-1;  static void
1728      priv->osd.backup_y = y-1;  osd_draw(osm_gps_map_osd_t *osd, GdkDrawable *drawable)
1729    {
1730        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1731    
1732      /* OSD itself uses some off-screen rendering, so check if the */      /* OSD itself uses some off-screen rendering, so check if the */
1733      /* offscreen buffer is present and create it if not */      /* offscreen buffer is present and create it if not */
1734      if(!priv->osd.overlay) {      if(!priv->controls.surface) {
1735          /* create overlay ... */          /* create overlay ... */
1736          priv->osd.overlay =          priv->controls.surface =
1737              cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W, OSD_H);              cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W+2, OSD_H+2);
1738    
1739            priv->controls.rendered = FALSE;
1740    #ifdef OSD_GPS_BUTTON
1741            priv->controls.gps_enabled = FALSE;
1742    #endif
1743    
1744    #ifdef OSD_SOURCE_SEL
1745            /* the initial OSD state is alway not-expanded */
1746            priv->source_sel.surface =
1747                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1748                                               OSD_S_W+2, OSD_S_H+2);
1749            priv->source_sel.rendered = FALSE;
1750    #endif
1751    
1752    #ifdef OSD_SCALE
1753            priv->scale.surface =
1754                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1755                                           OSD_SCALE_W, OSD_SCALE_H);
1756            priv->scale.zoom = -1;
1757    #endif
1758    
1759    #ifdef OSD_CROSSHAIR
1760            priv->crosshair.surface =
1761                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1762                                           OSD_CROSSHAIR_W, OSD_CROSSHAIR_H);
1763            priv->crosshair.rendered = FALSE;
1764    #endif
1765    
1766    #ifdef OSD_COORDINATES
1767            priv->coordinates.surface =
1768                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1769                                           OSD_COORDINATES_W, OSD_COORDINATES_H);
1770    
1771            priv->coordinates.lat = priv->coordinates.lon = OSM_GPS_MAP_INVALID;
1772    #endif
1773    
1774          /* ... and render it */          /* ... and render it */
1775          osm_gps_map_osd_render(priv);          osd_render(osd);
1776      }      }
1777    
1778      // now draw this onto the original context      // now draw this onto the original context
1779      cairo_t *cr = gdk_cairo_create(priv->pixmap);      cairo_t *cr = gdk_cairo_create(drawable);
1780      cairo_set_source_surface(cr, priv->osd.overlay, x, y);  
1781        gint x, y;
1782    
1783    #ifdef OSD_SCALE
1784        x =  OSD_X;
1785        y = -OSD_Y;
1786        if(x < 0) x += osd->widget->allocation.width - OSD_SCALE_W;
1787        if(y < 0) y += osd->widget->allocation.height - OSD_SCALE_H;
1788    
1789        cairo_set_source_surface(cr, priv->scale.surface, x, y);
1790      cairo_paint(cr);      cairo_paint(cr);
1791    #endif
1792    
1793    #ifdef OSD_CROSSHAIR
1794        x = (osd->widget->allocation.width - OSD_CROSSHAIR_W)/2;
1795        y = (osd->widget->allocation.height - OSD_CROSSHAIR_H)/2;
1796    
1797        cairo_set_source_surface(cr, priv->crosshair.surface, x, y);
1798        cairo_paint(cr);
1799    #endif
1800    
1801    #ifdef OSD_NAV
1802        if(priv->nav.surface) {
1803            x =  OSD_X;
1804            if(x < 0) x += osd->widget->allocation.width - OSD_NAV_W;
1805            y = (osd->widget->allocation.height - OSD_NAV_H)/2;
1806    
1807            cairo_set_source_surface(cr, priv->nav.surface, x, y);
1808            cairo_paint(cr);
1809        }
1810    #endif
1811    
1812    #ifdef OSD_COORDINATES
1813        x = -OSD_X;
1814        y = -OSD_Y;
1815        if(x < 0) x += osd->widget->allocation.width - OSD_COORDINATES_W;
1816        if(y < 0) y += osd->widget->allocation.height - OSD_COORDINATES_H;
1817    
1818        cairo_set_source_surface(cr, priv->coordinates.surface, x, y);
1819        cairo_paint(cr);
1820    #endif
1821    
1822    #ifdef OSD_BALLOON
1823        if(priv->balloon.surface) {
1824    
1825            /* convert given lat lon into screen coordinates */
1826            gint x, y;
1827            osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget),
1828                                          priv->balloon.lat, priv->balloon.lon,
1829                                          &x, &y);
1830    
1831            /* check if balloon needs to be rerendered */
1832            osd_render_balloon(osd);
1833    
1834            cairo_set_source_surface(cr, priv->balloon.surface,
1835                                     x + priv->balloon.offset_x,
1836                                     y + priv->balloon.offset_y);
1837            cairo_paint(cr);
1838        }
1839    #endif
1840    
1841        x = OSD_X;
1842        if(x < 0)
1843            x += osd->widget->allocation.width - OSD_W;
1844    
1845        y = OSD_Y;
1846        if(y < 0)
1847            y += osd->widget->allocation.height - OSD_H;
1848    
1849        cairo_set_source_surface(cr, priv->controls.surface, x, y);
1850        cairo_paint(cr);
1851    
1852    #ifdef OSD_SOURCE_SEL
1853        if(!priv->source_sel.handler_id) {
1854            /* the OSD source selection is not being animated */
1855            if(!priv->source_sel.expanded)
1856                x = osd->widget->allocation.width - OSD_S_W;
1857            else
1858                x = osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
1859        } else
1860            x = priv->source_sel.shift;
1861    
1862        y = OSD_S_Y;
1863        if(OSD_S_Y < 0) {
1864            if(!priv->source_sel.expanded)
1865                y = osd->widget->allocation.height - OSD_S_H + OSD_S_Y;
1866            else
1867                y = osd->widget->allocation.height - OSD_S_EXP_H + OSD_S_Y;
1868        }
1869    
1870        cairo_set_source_surface(cr, priv->source_sel.surface, x, y);
1871        cairo_paint(cr);
1872    #endif
1873    
1874      cairo_destroy(cr);      cairo_destroy(cr);
1875  }  }
1876    
1877  static void  static void
1878  osm_gps_map_osd_restore (OsmGpsMap *map)  osd_free(osm_gps_map_osd_t *osd)
1879  {  {
1880      OsmGpsMapPrivate *priv = map->priv;      osd_priv_t *priv = (osd_priv_t *)(osd->priv);
1881    
1882      /* restore backup of previous contents */      if (priv->controls.surface)
1883      if(priv->osd.backup) {           cairo_surface_destroy(priv->controls.surface);
1884          /* create backup of background */  
1885          gdk_draw_drawable(priv->pixmap,  #ifdef OSD_SOURCE_SEL
1886              GTK_WIDGET(map)->style->fg_gc[GTK_WIDGET_STATE(GTK_WIDGET(map))],      if(priv->source_sel.handler_id)
1887                        priv->osd.backup, 0, 0,          gtk_timeout_remove(priv->source_sel.handler_id);
1888                        priv->osd.backup_x, priv->osd.backup_y, OSD_W+2, OSD_H+2);  
1889      }      if (priv->source_sel.surface)
1890             cairo_surface_destroy(priv->source_sel.surface);
1891    #endif
1892    
1893    #ifdef OSD_SCALE
1894        if (priv->scale.surface)
1895             cairo_surface_destroy(priv->scale.surface);
1896    #endif
1897    
1898    #ifdef OSD_CROSSHAIR
1899        if (priv->crosshair.surface)
1900             cairo_surface_destroy(priv->crosshair.surface);
1901    #endif
1902    
1903    #ifdef OSD_NAV
1904        if (priv->nav.surface)
1905             cairo_surface_destroy(priv->nav.surface);
1906    #endif
1907    
1908    #ifdef OSD_COORDINATES
1909        if (priv->coordinates.surface)
1910             cairo_surface_destroy(priv->coordinates.surface);
1911    #endif
1912    
1913    #ifdef OSD_BALLOON
1914        if (priv->balloon.surface)
1915             cairo_surface_destroy(priv->balloon.surface);
1916    #endif
1917    
1918        g_free(priv);
1919  }  }
1920    
1921  static void  static gboolean
1922  osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdGpsCallback cb, gpointer data)  osd_busy(osm_gps_map_osd_t *osd)
1923  {  {
1924      OsmGpsMapPrivate *priv;  #ifdef OSD_SOURCE_SEL
1925        osd_priv_t *priv = (osd_priv_t *)(osd->priv);
1926        return (priv->source_sel.handler_id != 0);
1927    #else
1928        return FALSE;
1929    #endif
1930    }
1931    
1932      g_return_if_fail (OSM_IS_GPS_MAP (map));  static osm_gps_map_osd_t osd_classic = {
1933      priv = map->priv;      .widget     = NULL,
1934    
1935        .draw       = osd_draw,
1936        .check      = osd_check,
1937        .render     = osd_render,
1938        .free       = osd_free,
1939        .busy       = osd_busy,
1940    
1941      priv->osd.cb = cb;      .cb         = NULL,
1942      priv->osd.data = data;      .data       = NULL,
1943    
1944        .priv       = NULL
1945    };
1946    
1947    /* this is the only function that's externally visible */
1948    void
1949    osm_gps_map_osd_classic_init(OsmGpsMap *map)
1950    {
1951        osd_priv_t *priv = osd_classic.priv = g_new0(osd_priv_t, 1);
1952    
1953    #ifdef OSD_BALLOON
1954        priv->balloon.lat = OSM_GPS_MAP_INVALID;
1955        priv->balloon.lon = OSM_GPS_MAP_INVALID;
1956    #endif
1957    
1958        osd_classic.priv = priv;
1959    
1960        osm_gps_map_register_osd(map, &osd_classic);
1961    }
1962    
1963    #ifdef OSD_GPS_BUTTON
1964    /* below are osd specific functions which aren't used by osm-gps-map */
1965    /* but instead are to be used by the main application */
1966    void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb,
1967                                     gpointer data) {
1968        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1969        g_return_if_fail (osd);
1970    
1971        osd->cb = cb;
1972        osd->data = data;
1973    
1974      /* this may have changed the state of the gps button */      /* this may have changed the state of the gps button */
1975      /* we thus re-render the overlay */      /* we thus re-render the overlay */
1976      osm_gps_map_osd_render(priv);      osd->render(osd);
1977    
1978      osm_gps_map_map_redraw_idle(map);      osm_gps_map_redraw(map);
1979    }
1980    #endif
1981    
1982    osd_button_t
1983    osm_gps_map_osd_check(OsmGpsMap *map, gint x, gint y) {
1984        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1985        g_return_val_if_fail (osd, OSD_NONE);
1986    
1987        return osd_check(osd, TRUE, x, y);
1988  }  }
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  Added in v.133