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 132 by harbaum, Thu Oct 1 08:09:00 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        } nav;
86    #endif
87    
88      cairo_surface_t *overlay;  #ifdef OSD_COORDINATES
89        struct {
90            cairo_surface_t *surface;
91            float lat, lon;
92        } coordinates;
93    #endif
94    
95    #ifdef OSD_SOURCE_SEL
96        struct {
97            /* values to handle the "source" menu */
98            cairo_surface_t *surface;
99            gboolean expanded;
100            gint shift, dir, count;
101            gint handler_id;
102            gint width, height;
103            gboolean rendered;
104        } source_sel;
105    #endif
106    
     OsmGpsMapOsdGpsCallback cb;  
     gpointer data;  
107  } osd_priv_t;  } osd_priv_t;
108    
109  /* the osd structure mainly contains various callbacks */  #ifdef OSD_BALLOON
110  /* required to draw and update the OSD */  /* most visual effects are hardcoded by now, but may be made */
111  typedef struct {  /* available via properties later */
112    #ifndef BALLOON_AREA_WIDTH
113    #define BALLOON_AREA_WIDTH           290
114    #endif
115    #ifndef BALLOON_AREA_HEIGHT
116    #define BALLOON_AREA_HEIGHT           75
117    #endif
118    #ifndef BALLOON_CORNER_RADIUS
119    #define BALLOON_CORNER_RADIUS         10
120    #endif
121    
122      void(enable_gps)(OsmGpsMap *, OsmGpsMapOsdGpsCallback, gpointer);  #define BALLOON_BORDER               (BALLOON_CORNER_RADIUS/2)
123      void(restore)(OsmGpsMap*);  #define BALLOON_WIDTH                (BALLOON_AREA_WIDTH + 2 * BALLOON_BORDER)
124      void(draw)(OsmGpsMap *, gint, gint);  #define BALLOON_HEIGHT               (BALLOON_AREA_HEIGHT + 2 * BALLOON_BORDER)
125      void(render)(OsmGpsMapPrivate *);  #define BALLOON_TRANSPARENCY         0.8
126      osd_button_t(*check)(gint, gint);       /* check if x/y lies within OSD */  #define POINTER_HEIGHT                20
127      void(free)(gpointer);  #define POINTER_FOOT_WIDTH            20
128    #define POINTER_OFFSET               (BALLOON_CORNER_RADIUS*3/4)
129    #define BALLOON_SHADOW               (BALLOON_CORNER_RADIUS/2)
130    #define BALLOON_SHADOW_TRANSPARENCY  0.2
131    
132      gpointer priv;  #define BALLOON_W  (BALLOON_WIDTH + BALLOON_SHADOW)
133  } osm_gps_map_osd_t;  #define BALLOON_H  (BALLOON_HEIGHT + POINTER_HEIGHT + BALLOON_SHADOW)
134    
135  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;  
 }  
136    
137  /* this is the only function that's externally visible */  
138  osm_gps_map_osd_t *  /* draw the bubble shape. this is used twice, once for the shape and once */
139  osm_gps_map_osd_classic_init(void)  /* for the shadow */
140  {  static void
141      return osd_classic;  osm_gps_map_draw_balloon_shape (cairo_t *cr, int x0, int y0, int x1, int y1,
142           gboolean bottom, int px, int py, int px0, int px1) {
143    
144        cairo_move_to (cr, x0, y0 + BALLOON_CORNER_RADIUS);
145        cairo_arc (cr, x0 + BALLOON_CORNER_RADIUS, y0 + BALLOON_CORNER_RADIUS,
146                   BALLOON_CORNER_RADIUS, -M_PI, -M_PI/2);
147        if(!bottom) {
148            /* insert top pointer */
149            cairo_line_to (cr, px1, y0);
150            cairo_line_to (cr, px, py);
151            cairo_line_to (cr, px0, y0);
152        }
153    
154        cairo_line_to (cr, x1 - BALLOON_CORNER_RADIUS, y0);
155        cairo_arc (cr, x1 - BALLOON_CORNER_RADIUS, y0 + BALLOON_CORNER_RADIUS,
156                   BALLOON_CORNER_RADIUS, -M_PI/2, 0);
157        cairo_line_to (cr, x1 , y1 - BALLOON_CORNER_RADIUS);
158        cairo_arc (cr, x1 - BALLOON_CORNER_RADIUS, y1 - BALLOON_CORNER_RADIUS,
159                   BALLOON_CORNER_RADIUS, 0, M_PI/2);
160        if(bottom) {
161            /* insert bottom pointer */
162            cairo_line_to (cr, px0, y1);
163            cairo_line_to (cr, px, py);
164            cairo_line_to (cr, px1, y1);
165        }
166    
167        cairo_line_to (cr, x0 + BALLOON_CORNER_RADIUS, y1);
168        cairo_arc (cr, x0 + BALLOON_CORNER_RADIUS, y1 - BALLOON_CORNER_RADIUS,
169                   BALLOON_CORNER_RADIUS, M_PI/2, M_PI);
170    
171        cairo_close_path (cr);
172  }  }
173    
174  static void  static void
175  osm_gps_map_osd_free(gpointer priv_ptr)  osd_render_balloon(osm_gps_map_osd_t *osd) {
176        osd_priv_t *priv = (osd_priv_t*)osd->priv;
177    
178        /* get zoom */
179        gint zoom;
180        g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);
181    
182        /* ------- convert given coordinate into screen position --------- */
183        gint xs, ys;
184        osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget),
185                                          priv->balloon.lat, priv->balloon.lon,
186                                          &xs, &ys);
187    
188        gint x0 = 1, y0 = 1;
189    
190        /* check position of this relative to screen center to determine */
191        /* pointer direction ... */
192        int pointer_x, pointer_x0, pointer_x1;
193        int pointer_y;
194    
195        /* ... and calculate position */
196        int orientation = 0;
197        if(xs > osd->widget->allocation.width/2) {
198            priv->balloon.offset_x = -BALLOON_WIDTH + POINTER_OFFSET;
199            pointer_x = x0 - priv->balloon.offset_x;
200            pointer_x0 = pointer_x - (BALLOON_CORNER_RADIUS - POINTER_OFFSET);
201            pointer_x1 = pointer_x0 - POINTER_FOOT_WIDTH;
202            orientation |= 1;
203        } else {
204            priv->balloon.offset_x = -POINTER_OFFSET;
205            pointer_x = x0 - priv->balloon.offset_x;
206            pointer_x1 = pointer_x + (BALLOON_CORNER_RADIUS - POINTER_OFFSET);
207            pointer_x0 = pointer_x1 + POINTER_FOOT_WIDTH;
208        }
209    
210        gboolean bottom = FALSE;
211        if(ys > osd->widget->allocation.height/2) {
212            priv->balloon.offset_y = -BALLOON_HEIGHT - POINTER_HEIGHT;
213            pointer_y = y0 - priv->balloon.offset_y;
214            bottom = TRUE;
215            orientation |= 2;
216        } else {
217            priv->balloon.offset_y = 0;
218            pointer_y = y0 - priv->balloon.offset_y;
219            y0 += POINTER_HEIGHT;
220        }
221    
222        /* if required orientation equals current one, then don't render */
223        /* anything */
224        if(orientation == priv->balloon.orientation)
225            return;
226    
227        priv->balloon.orientation = orientation;
228    
229        /* calculate bottom/right of box */
230        int x1 = x0 + BALLOON_WIDTH, y1 = y0 + BALLOON_HEIGHT;
231    
232        /* save balloon screen coordinates for later use */
233        priv->balloon.rect.x = x0 + BALLOON_BORDER;
234        priv->balloon.rect.y = y0 + BALLOON_BORDER;
235        priv->balloon.rect.w = x1 - x0 - 2*BALLOON_BORDER;
236        priv->balloon.rect.h = y1 - y0 - 2*BALLOON_BORDER;
237    
238        cairo_t *cr = cairo_create(priv->balloon.surface);
239        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
240        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
241        cairo_paint(cr);
242        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
243    
244        /* --------- draw shadow --------------- */
245        osm_gps_map_draw_balloon_shape (cr,
246                     x0 + BALLOON_SHADOW, y0 + BALLOON_SHADOW,
247                     x1 + BALLOON_SHADOW, y1 + BALLOON_SHADOW,
248                     bottom, pointer_x, pointer_y,
249                     pointer_x0 + BALLOON_SHADOW, pointer_x1 + BALLOON_SHADOW);
250    
251        cairo_set_source_rgba (cr, 0, 0, 0, BALLOON_SHADOW_TRANSPARENCY);
252        cairo_fill_preserve (cr);
253        cairo_set_source_rgba (cr, 1, 0, 0, 1.0);
254        cairo_set_line_width (cr, 0);
255        cairo_stroke (cr);
256    
257        /* --------- draw main shape ----------- */
258        osm_gps_map_draw_balloon_shape (cr, x0, y0, x1, y1,
259                     bottom, pointer_x, pointer_y, pointer_x0, pointer_x1);
260    
261        cairo_set_source_rgba (cr, 1, 1, 1, BALLOON_TRANSPARENCY);
262        cairo_fill_preserve (cr);
263        cairo_set_source_rgba (cr, 0, 0, 0, BALLOON_TRANSPARENCY);
264        cairo_set_line_width (cr, 1);
265        cairo_stroke (cr);
266    
267        if (priv->balloon.cb) {
268            /* clip in case application tries to draw in */
269                /* exceed of the balloon */
270            cairo_rectangle (cr, priv->balloon.rect.x, priv->balloon.rect.y,
271                             priv->balloon.rect.w, priv->balloon.rect.h);
272            cairo_clip (cr);
273            cairo_new_path (cr);  /* current path is not
274                                     consumed by cairo_clip() */
275    
276            priv->balloon.cb(cr, &priv->balloon.rect, priv->balloon.data);
277        }
278    
279        cairo_destroy(cr);
280    }
281    
282    /* return true if balloon is being displayed and if */
283    /* the given coordinate is within this balloon */
284    static gboolean
285    osd_balloon_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y)
286  {  {
287      osd_priv_t *priv = (osd_priv_t *)priv_ptr;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
288    
289        if(!priv->balloon.surface)
290            return FALSE;
291    
292      g_free(priv);      gint xs, ys;
293        osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget),
294                                          priv->balloon.lat, priv->balloon.lon,
295                                          &xs, &ys);
296    
297        xs += priv->balloon.rect.x + priv->balloon.offset_x;
298        ys += priv->balloon.rect.y + priv->balloon.offset_y;
299    
300        gboolean is_in =
301            (x > xs) && (x < xs + priv->balloon.rect.w) &&
302            (y > ys) && (y < ys + priv->balloon.rect.h);
303    
304        /* handle the fact that the balloon may have been created by the */
305        /* button down event */
306        if(!is_in && !down && !priv->balloon.just_created) {
307            /* the user actually clicked outside the balloon */
308    
309            /* close the balloon! */
310            osm_gps_map_osd_clear_balloon (OSM_GPS_MAP(osd->widget));
311        }
312    
313        return is_in;
314    }
315    
316    void osm_gps_map_osd_clear_balloon (OsmGpsMap *map) {
317        g_return_if_fail (OSM_IS_GPS_MAP (map));
318    
319        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
320        g_return_if_fail (osd);
321    
322        osd_priv_t *priv = (osd_priv_t*)osd->priv;
323        g_return_if_fail (priv);
324    
325        if(priv->balloon.surface) {
326            cairo_surface_destroy(priv->balloon.surface);
327            priv->balloon.surface = NULL;
328            priv->balloon.lat = OSM_GPS_MAP_INVALID;
329            priv->balloon.lon = OSM_GPS_MAP_INVALID;
330        }
331        osm_gps_map_redraw(map);
332    }
333    
334    void
335    osm_gps_map_osd_draw_balloon (OsmGpsMap *map, float latitude, float longitude,
336                                  OsmGpsMapBalloonCallback cb, gpointer data) {
337        g_return_if_fail (OSM_IS_GPS_MAP (map));
338    
339        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
340        g_return_if_fail (osd);
341    
342        osd_priv_t *priv = (osd_priv_t*)osd->priv;
343        g_return_if_fail (priv);
344    
345        osm_gps_map_osd_clear_balloon (map);
346    
347        /* allocate balloon surface */
348        priv->balloon.surface =
349            cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
350                                       BALLOON_W+2, BALLOON_H+2);
351    
352        priv->balloon.lat = latitude;
353        priv->balloon.lon = longitude;
354        priv->balloon.cb = cb;
355        priv->balloon.data = data;
356        priv->balloon.just_created = TRUE;
357    
358        priv->balloon.orientation = -1;
359    
360        osd_render_balloon(osd);
361    
362        osm_gps_map_redraw(map);
363  }  }
364    
365    #endif // OSD_BALLOON
366    
367  /* position and extent of bounding box */  /* position and extent of bounding box */
368    #ifndef OSD_X
369  #define OSD_X      (10)  #define OSD_X      (10)
370  #define OSD_Y      (10)  #endif
371    
372  #define OSD_COLOR            0.5, 0.5, 1  #ifndef OSD_Y
373  #define OSD_COLOR_DISABLED   0.8, 0.8, 0.8  #define OSD_Y      (10)
374    #endif
375    
376  /* parameters of the direction shape */  /* parameters of the direction shape */
377  #ifndef OSM_GPS_MAP_OSD_DIAMETER  #ifndef OSD_DIAMETER
378  #define D_RAD  (30)         // diameter of dpad  #define D_RAD  (30)         // diameter of dpad
379  #else  #else
380  #define D_RAD  (OSM_GPS_MAP_OSD_DIAMETER)  #define D_RAD  (OSD_DIAMETER)
381  #endif  #endif
382  #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
383  #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 387  osm_gps_map_osd_free(gpointer priv_ptr)
387  #define Z_STEP   (D_RAD/4)  // distance between dpad and zoom  #define Z_STEP   (D_RAD/4)  // distance between dpad and zoom
388  #define Z_RAD    (D_RAD/2)  // radius of "caps" of zoom bar  #define Z_RAD    (D_RAD/2)  // radius of "caps" of zoom bar
389    
390    #ifdef OSD_SHADOW_ENABLE
391  /* shadow also depends on control size */  /* shadow also depends on control size */
392  #define OSD_SHADOW (D_RAD/6)  #define OSD_SHADOW (D_RAD/6)
393    #else
394    #define OSD_SHADOW (0)
395    #endif
396    
397    /* normally the GPS button is in the center of the dpad. if there's */
398    /* no dpad it will go into the zoom area */
399    #if defined(OSD_GPS_BUTTON) && defined(OSD_NO_DPAD)
400    #define Z_GPS  1
401    #else
402    #define Z_GPS  0
403    #endif
404    
405  /* total width and height of controls incl. shadow */  /* total width and height of controls incl. shadow */
406  #define OSD_W    (2*D_RAD + OSD_SHADOW)  #define OSD_W    (2*D_RAD + OSD_SHADOW + Z_GPS * 2 * Z_RAD)
407    #if !Z_GPS
408  #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)
409    #else
410    #define OSD_H    (2*Z_RAD + OSD_SHADOW)
411    #endif
412    
413    #ifdef OSD_SHADOW_ENABLE
414  #define OSD_LBL_SHADOW (OSD_SHADOW/2)  #define OSD_LBL_SHADOW (OSD_SHADOW/2)
415    #endif
416    
417    #define Z_TOP    ((1-Z_GPS) * (2 * D_RAD + Z_STEP))
418    
 #define Z_TOP    (2 * D_RAD + Z_STEP)  
419  #define Z_MID    (Z_TOP + Z_RAD)  #define Z_MID    (Z_TOP + Z_RAD)
420  #define Z_BOT    (Z_MID + Z_RAD)  #define Z_BOT    (Z_MID + Z_RAD)
421  #define Z_LEFT   (Z_RAD)  #define Z_LEFT   (Z_RAD)
422  #define Z_RIGHT  (2 * D_RAD - Z_RAD)  #define Z_RIGHT  (2 * D_RAD - Z_RAD + Z_GPS * 2 * Z_RAD)
423    #define Z_CENTER ((Z_RIGHT + Z_LEFT)/2)
424    
425  /* create the cairo shape used for the zoom buttons */  /* create the cairo shape used for the zoom buttons */
426  static void  static void
427  osm_gps_map_osd_zoom_shape(cairo_t *cr, gint x, gint y)  osd_zoom_shape(cairo_t *cr, gint x, gint y)
428  {  {
429      cairo_move_to (cr, x+Z_LEFT,    y+Z_TOP);      cairo_move_to (cr, x+Z_LEFT,    y+Z_TOP);
430      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 433  osm_gps_map_osd_zoom_shape(cairo_t *cr,
433      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);
434  }  }
435    
436    /* ------------------- color/shadow functions ----------------- */
437    
438    #ifndef OSD_COLOR
439    /* if no color has been specified we just use the gdks default colors */
440    static void
441    osd_labels(cairo_t *cr, gint width, gboolean enabled,
442                           GdkColor *fg, GdkColor *disabled) {
443        if(enabled)  gdk_cairo_set_source_color(cr, fg);
444        else         gdk_cairo_set_source_color(cr, disabled);
445        cairo_set_line_width (cr, width);
446    }
447    #else
448    static void
449    osd_labels(cairo_t *cr, gint width, gboolean enabled) {
450        if(enabled)  cairo_set_source_rgb (cr, OSD_COLOR);
451        else         cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);
452        cairo_set_line_width (cr, width);
453    }
454    #endif
455    
456    #ifdef OSD_SHADOW_ENABLE
457    static void
458    osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {
459        cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);
460        cairo_set_line_width (cr, width);
461    }
462    #endif
463    
464    #ifndef OSD_NO_DPAD
465  /* create the cairo shape used for the dpad */  /* create the cairo shape used for the dpad */
466  static void  static void
467  osm_gps_map_osd_dpad_shape(cairo_t *cr, gint x, gint y)  osd_dpad_shape(cairo_t *cr, gint x, gint y)
468  {  {
469      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);
470  }  }
471    #endif
472    
473    #ifdef OSD_SHADOW_ENABLE
474    static void
475    osd_shape_shadow(cairo_t *cr) {
476        cairo_set_source_rgba (cr, 0, 0, 0, 0.2);
477        cairo_fill (cr);
478        cairo_stroke (cr);
479    }
480    #endif
481    
482    #ifndef OSD_COLOR
483    /* if no color has been specified we just use the gdks default colors */
484    static void
485    osd_shape(cairo_t *cr, GdkColor *bg, GdkColor *fg) {
486        gdk_cairo_set_source_color(cr, bg);
487        cairo_fill_preserve (cr);
488        gdk_cairo_set_source_color(cr, fg);
489        cairo_set_line_width (cr, 1);
490        cairo_stroke (cr);
491    }
492    #else
493    static void
494    osd_shape(cairo_t *cr) {
495        cairo_set_source_rgb (cr, OSD_COLOR_BG);
496        cairo_fill_preserve (cr);
497        cairo_set_source_rgb (cr, OSD_COLOR);
498        cairo_set_line_width (cr, 1);
499        cairo_stroke (cr);
500    }
501    #endif
502    
503    
504  static gboolean  static gboolean
505  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 507  osm_gps_map_in_circle(gint x, gint y, gi
507      return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);      return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);
508  }  }
509    
510    #ifndef OSD_NO_DPAD
511  /* check whether x/y is within the dpad */  /* check whether x/y is within the dpad */
512  static osd_button_t  static osd_button_t
513  osm_gps_map_osd_check_dpad(gint x, gint y)  osd_check_dpad(gint x, gint y)
514  {  {
515      /* within entire dpad circle */      /* within entire dpad circle */
516      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))
517      {      {
518          /* convert into position relative to dpads centre */          /* convert into position relative to dpads centre */
519          x -= (OSD_X + D_RAD);          x -= D_RAD;
520          y -= (OSD_Y + D_RAD);          y -= D_RAD;
521    
522    #ifdef OSD_GPS_BUTTON
523          /* check for dpad center goes here! */          /* check for dpad center goes here! */
524          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))
525              return OSD_GPS;              return OSD_GPS;
526    #endif
527    
528          if( y < 0 && abs(x) < abs(y))          if( y < 0 && abs(x) < abs(y))
529              return OSD_UP;              return OSD_UP;
# Line 173  osm_gps_map_osd_check_dpad(gint x, gint Line 541  osm_gps_map_osd_check_dpad(gint x, gint
541      }      }
542      return OSD_NONE;      return OSD_NONE;
543  }  }
544    #endif
545    
546  /* check whether x/y is within the zoom pads */  /* check whether x/y is within the zoom pads */
547  static osd_button_t  static osd_button_t
548  osm_gps_map_osd_check_zoom(gint x, gint y) {  osd_check_zoom(gint x, gint y) {
549      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) {
550    
551          /* within circle around (-) label */          /* within circle around (-) label */
552          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)  
553              return OSD_OUT;              return OSD_OUT;
554    
555          /* within circle around (+) label */          /* within circle around (+) label */
556          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))
557              return OSD_IN;              return OSD_IN;
558    
559    #if Z_GPS == 1
560            /* within square around center */
561            if( x > Z_CENTER - Z_RAD && x < Z_CENTER + Z_RAD)
562                return OSD_GPS;
563    #endif
564    
565            /* between center of (-) button and center of entire zoom control area */
566            if(x > OSD_LEFT && x < D_RAD)
567                return OSD_OUT;
568    
569          /* between center of (+) button and center of entire zoom control area */          /* between center of (+) button and center of entire zoom control area */
570          if(x < OSD_RIGHT && x > OSD_X + D_RAD)          if(x < OSD_RIGHT && x > D_RAD)
571              return OSD_IN;              return OSD_IN;
572      }      }
573    
574      return OSD_NONE;      return OSD_NONE;
575  }  }
576    
577  static osd_button_t  #ifdef OSD_SOURCE_SEL
 osm_gps_map_osd_check(gint x, gint y) {  
     osd_button_t but = OSD_NONE;  
578    
579      /* first do a rough test for the OSD area. */  /* place source selection at right border */
580      /* this is just to avoid an unnecessary detailed test */  #define OSD_S_RAD (Z_RAD)
581      if(x > OSD_X && x < OSD_X + OSD_W &&  #define OSD_S_X   (-OSD_X)
582         y > OSD_Y && y < OSD_Y + OSD_H) {  #define OSD_S_Y   (OSD_Y)
583          but = osm_gps_map_osd_check_dpad(x, y);  #define OSD_S_PW  (2 * Z_RAD)
584    #define OSD_S_W   (OSD_S_PW)
585    #define OSD_S_PH  (2 * Z_RAD)
586    #define OSD_S_H   (OSD_S_PH + OSD_SHADOW)
587    
588    /* size of usable area when expanded */
589    #define OSD_S_AREA_W (priv->source_sel.width)
590    #define OSD_S_AREA_H (priv->source_sel.height)
591    #define OSD_S_EXP_W  (OSD_S_PW + OSD_S_AREA_W + OSD_SHADOW)
592    #define OSD_S_EXP_H  (OSD_S_AREA_H + OSD_SHADOW)
593    
594    /* internal value to draw the arrow on the "puller" */
595    #define OSD_S_D0  (OSD_S_RAD/2)
596    #ifndef OSD_FONT_SIZE
597    #define OSD_FONT_SIZE 16.0
598    #endif
599    #define OSD_TEXT_BORDER   (OSD_FONT_SIZE/2)
600    #define OSD_TEXT_SKIP     (OSD_FONT_SIZE/8)
601    
602          if(but == OSD_NONE)  /* draw the shape of the source selection OSD, either only the puller (not expanded) */
603              but = osm_gps_map_osd_check_zoom(x, y);  /* or the entire menu incl. the puller (expanded) */
604    static void
605    osd_source_shape(osd_priv_t *priv, cairo_t *cr, gint x, gint y) {
606        if(!priv->source_sel.expanded) {
607            /* just draw the puller */
608            cairo_move_to (cr, x + OSD_S_PW, y + OSD_S_PH);
609            cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
610            cairo_line_to (cr, x + OSD_S_PW, y);
611        } else {
612            /* draw the puller and the area itself */
613            cairo_move_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y + OSD_S_AREA_H);
614            cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H);
615            if(OSD_S_Y > 0) {
616                cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_PH);
617                cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
618            } else {
619                cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_AREA_H-OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
620                cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H - OSD_S_PH);
621                cairo_line_to (cr, x + OSD_S_PW, y);
622            }
623            cairo_line_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y);
624            cairo_close_path (cr);
625      }      }
626    }
627    
628      return but;  static void
629    osd_source_content(osm_gps_map_osd_t *osd, cairo_t *cr, gint offset) {
630        osd_priv_t *priv = (osd_priv_t*)osd->priv;
631    
632        int py = offset + OSD_S_RAD - OSD_S_D0;
633    
634        if(!priv->source_sel.expanded) {
635            /* draw the "puller" open (<) arrow */
636            cairo_move_to (cr, offset + OSD_S_RAD + OSD_S_D0/2, py);
637            cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
638            cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
639        } else {
640            if(OSD_S_Y < 0)
641                py += OSD_S_AREA_H - OSD_S_PH;
642    
643            /* draw the "puller" close (>) arrow */
644            cairo_move_to (cr, offset + OSD_S_RAD - OSD_S_D0/2, py);
645            cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
646            cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
647            cairo_stroke(cr);
648    
649            /* don't draw a shadow for the text content */
650            if(offset == 1) {
651                gint source;
652                g_object_get(osd->widget, "map-source", &source, NULL);
653    
654                cairo_select_font_face (cr, "Sans",
655                                        CAIRO_FONT_SLANT_NORMAL,
656                                        CAIRO_FONT_WEIGHT_BOLD);
657                cairo_set_font_size (cr, OSD_FONT_SIZE);
658    
659                int i, step = (priv->source_sel.height - 2*OSD_TEXT_BORDER) /
660                    OSM_GPS_MAP_SOURCE_LAST;
661                for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
662                    cairo_text_extents_t extents;
663                    const char *src = osm_gps_map_source_get_friendly_name(i);
664                    cairo_text_extents (cr, src, &extents);
665    
666                    int x = offset + OSD_S_PW + OSD_TEXT_BORDER;
667                    int y = offset + step * (i-1) + OSD_TEXT_BORDER;
668    
669                    /* draw filled rectangle if selected */
670                    if(source == i) {
671                        cairo_rectangle(cr, x - OSD_TEXT_BORDER/2,
672                                        y - OSD_TEXT_SKIP,
673                                        priv->source_sel.width - OSD_TEXT_BORDER,
674                                        step + OSD_TEXT_SKIP);
675                        cairo_fill(cr);
676    
677                        /* temprarily draw with background color */
678    #ifndef OSD_COLOR
679                        GdkColor bg = osd->widget->style->bg[GTK_STATE_NORMAL];
680                        gdk_cairo_set_source_color(cr, &bg);
681    #else
682                        cairo_set_source_rgb (cr, OSD_COLOR_BG);
683    #endif
684                    }
685    
686                    cairo_move_to (cr, x, y + OSD_TEXT_SKIP - extents.y_bearing);
687                    cairo_show_text (cr, src);
688    
689                    /* restore color */
690                    if(source == i) {
691    #ifndef OSD_COLOR
692                        GdkColor fg = osd->widget->style->fg[GTK_STATE_NORMAL];
693                        gdk_cairo_set_source_color(cr, &fg);
694    #else
695                        cairo_set_source_rgb (cr, OSD_COLOR);
696    #endif
697                    }
698                }
699            }
700        }
701  }  }
702    
703  static void  static void
704  osm_gps_map_osd_shape_shadow(cairo_t *cr) {  osd_render_source_sel(osm_gps_map_osd_t *osd, gboolean force_rerender) {
705      cairo_set_source_rgba (cr, 0, 0, 0, 0.2);      osd_priv_t *priv = (osd_priv_t*)osd->priv;
706      cairo_fill (cr);  
707        if(priv->source_sel.rendered && !force_rerender)
708            return;
709    
710        priv->source_sel.rendered = TRUE;
711    
712    #ifndef OSD_COLOR
713        GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
714        GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
715        GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
716    #endif
717    
718        /* draw source selector */
719        cairo_t *cr = cairo_create(priv->source_sel.surface);
720        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
721        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
722        cairo_paint(cr);
723        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
724    
725    #ifdef OSD_SHADOW_ENABLE
726        osd_source_shape(priv, cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
727        osd_shape_shadow(cr);
728    #endif
729    
730        osd_source_shape(priv, cr, 1, 1);
731    #ifndef OSD_COLOR
732        osd_shape(cr, &bg, &fg);
733    #else
734        osd_shape(cr);
735    #endif
736    
737    #ifdef OSD_SHADOW_ENABLE
738        osd_labels_shadow(cr, Z_RAD/3, TRUE);
739        osd_source_content(osd, cr, 1+OSD_LBL_SHADOW);
740        cairo_stroke (cr);
741    #endif
742    #ifndef OSD_COLOR
743        osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
744    #else
745        osd_labels(cr, Z_RAD/3, TRUE);
746    #endif
747        osd_source_content(osd, cr, 1);
748      cairo_stroke (cr);      cairo_stroke (cr);
749    
750        cairo_destroy(cr);
751  }  }
752    
753  static void  /* re-allocate the buffer used to draw the menu. This is used */
754  osm_gps_map_osd_shape(cairo_t *cr) {  /* to collapse/expand the buffer */
755      cairo_set_source_rgb (cr, 1, 1, 1);  static void
756      cairo_fill_preserve (cr);  osd_source_reallocate(osm_gps_map_osd_t *osd) {
757      cairo_set_source_rgb (cr, OSD_COLOR);      osd_priv_t *priv = (osd_priv_t*)osd->priv;
758      cairo_set_line_width (cr, 1);  
759      cairo_stroke (cr);      /* re-allocate offscreen bitmap */
760        g_assert (priv->source_sel.surface);
761    
762        int w = OSD_S_W, h = OSD_S_H;
763        if(priv->source_sel.expanded) {
764            cairo_text_extents_t extents;
765    
766            /* determine content size */
767            cairo_t *cr = cairo_create(priv->source_sel.surface);
768            cairo_select_font_face (cr, "Sans",
769                                    CAIRO_FONT_SLANT_NORMAL,
770                                    CAIRO_FONT_WEIGHT_BOLD);
771            cairo_set_font_size (cr, OSD_FONT_SIZE);
772    
773            /* calculate menu size */
774            int i, max_h = 0, max_w = 0;
775            for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
776                const char *src = osm_gps_map_source_get_friendly_name(i);
777                cairo_text_extents (cr, src, &extents);
778    
779                if(extents.width > max_w) max_w = extents.width;
780                if(extents.height > max_h) max_h = extents.height;
781            }
782            cairo_destroy(cr);
783    
784            priv->source_sel.width  = max_w + 2*OSD_TEXT_BORDER;
785            priv->source_sel.height = OSM_GPS_MAP_SOURCE_LAST *
786                (max_h + 2*OSD_TEXT_SKIP) + 2*OSD_TEXT_BORDER;
787    
788            w = OSD_S_EXP_W;
789            h = OSD_S_EXP_H;
790        }
791    
792        cairo_surface_destroy(priv->source_sel.surface);
793        priv->source_sel.surface =
794            cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w+2, h+2);
795    
796        osd_render_source_sel(osd, TRUE);
797    }
798    
799    #define OSD_HZ      15
800    #define OSD_TIME    500
801    
802    static gboolean osd_source_animate(gpointer data) {
803        osm_gps_map_osd_t *osd = (osm_gps_map_osd_t*)data;
804        osd_priv_t *priv = (osd_priv_t*)osd->priv;
805        int diff = OSD_S_EXP_W - OSD_S_W - OSD_S_X;
806        gboolean done = FALSE;
807        priv->source_sel.count += priv->source_sel.dir;
808    
809        /* shifting in */
810        if(priv->source_sel.dir < 0) {
811            if(priv->source_sel.count <= 0) {
812                priv->source_sel.count = 0;
813                done = TRUE;
814            }
815        } else {
816            if(priv->source_sel.count >= 1000) {
817                priv->source_sel.expanded = FALSE;
818                osd_source_reallocate(osd);
819    
820                priv->source_sel.count = 1000;
821                done = TRUE;
822            }
823        }
824    
825    
826        /* count runs linearly from 0 to 1000, map this nicely onto a position */
827    
828        /* nice sinoid mapping */
829        float m = 0.5-cos(priv->source_sel.count * M_PI / 1000.0)/2;
830        priv->source_sel.shift =
831            (osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X) +
832            m * diff;
833    
834        /* make sure the screen is updated */
835        osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
836    
837        /* stop animation if done */
838        if(done)
839            priv->source_sel.handler_id = 0;
840    
841        return !done;
842  }  }
843    
844    /* switch between expand and collapse mode of source selection */
845  static void  static void
846  osm_gps_map_osd_dpad_labels(cairo_t *cr, gint x, gint y) {  osd_source_toggle(osm_gps_map_osd_t *osd)
847    {
848        osd_priv_t *priv = (osd_priv_t*)osd->priv;
849    
850        /* ignore clicks while animation is running */
851        if(priv->source_sel.handler_id)
852            return;
853    
854        /* expand immediately, collapse is handle at the end of the */
855        /* collapse animation */
856        if(!priv->source_sel.expanded) {
857            priv->source_sel.expanded = TRUE;
858            osd_source_reallocate(osd);
859    
860            priv->source_sel.count = 1000;
861            priv->source_sel.shift = osd->widget->allocation.width - OSD_S_W;
862            priv->source_sel.dir = -1000/OSD_HZ;
863        } else {
864            priv->source_sel.count =  0;
865            priv->source_sel.shift = osd->widget->allocation.width -
866                OSD_S_EXP_W + OSD_S_X;
867            priv->source_sel.dir = +1000/OSD_HZ;
868        }
869    
870        /* start timer to handle animation */
871        priv->source_sel.handler_id = gtk_timeout_add(OSD_TIME/OSD_HZ,
872                                                      osd_source_animate, osd);
873    }
874    
875    /* check if the user clicked inside the source selection area */
876    static osd_button_t
877    osd_source_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y) {
878        osd_priv_t *priv = (osd_priv_t*)osd->priv;
879    
880        if(!priv->source_sel.expanded)
881            x -= osd->widget->allocation.width - OSD_S_W;
882        else
883            x -= osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
884    
885        if(OSD_S_Y > 0)
886            y -= OSD_S_Y;
887        else
888            y -= osd->widget->allocation.height - OSD_S_PH + OSD_S_Y;
889    
890        /* within square around puller? */
891        if(y > 0 && y < OSD_S_PH && x > 0 && x < OSD_S_PW) {
892            /* really within puller shape? */
893            if(x > Z_RAD || osm_gps_map_in_circle(x, y, Z_RAD, Z_RAD, Z_RAD)) {
894                /* expand source selector */
895                if(down)
896                    osd_source_toggle(osd);
897    
898                /* tell upper layers that user clicked some background element */
899                /* of the OSD */
900                return OSD_BG;
901            }
902        }
903    
904        /* check for clicks into data area */
905        if(priv->source_sel.expanded && !priv->source_sel.handler_id) {
906            /* re-adjust from puller top to content top */
907            if(OSD_S_Y < 0)
908                y += OSD_S_EXP_H - OSD_S_PH;
909    
910            if(x > OSD_S_PW &&
911               x < OSD_S_PW + OSD_S_EXP_W &&
912               y > 0 &&
913               y < OSD_S_EXP_H) {
914    
915                int step = (priv->source_sel.height - 2*OSD_TEXT_BORDER)
916                    / OSM_GPS_MAP_SOURCE_LAST;
917    
918                y -= OSD_TEXT_BORDER - OSD_TEXT_SKIP;
919                y /= step;
920                y += 1;
921    
922                if(down) {
923                    gint old = 0;
924                    g_object_get(osd->widget, "map-source", &old, NULL);
925    
926                    if(y > OSM_GPS_MAP_SOURCE_NULL &&
927                       y <= OSM_GPS_MAP_SOURCE_LAST &&
928                       old != y) {
929                        g_object_set(osd->widget, "map-source", y, NULL);
930    
931                        osd_render_source_sel(osd, TRUE);
932                        osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
933                    }
934                }
935    
936                /* return "clicked in OSD background" to prevent further */
937                /* processing by application */
938                return OSD_BG;
939            }
940        }
941    
942        return OSD_NONE;
943    }
944    #endif // OSD_SOURCE_SEL
945    
946    static osd_button_t
947    osd_check(osm_gps_map_osd_t *osd, gboolean down, gint x, gint y) {
948        osd_button_t but = OSD_NONE;
949    
950    #ifdef OSD_BALLOON
951        if(down) {
952            /* needed to handle balloons that are created at click */
953            osd_priv_t *priv = (osd_priv_t*)osd->priv;
954            priv->balloon.just_created = FALSE;
955        }
956    #endif
957    
958    #ifdef OSD_SOURCE_SEL
959        /* the source selection area is handles internally */
960        but = osd_source_check(osd, down, x, y);
961    #endif
962    
963        if(but == OSD_NONE) {
964            gint mx = x - OSD_X;
965            gint my = y - OSD_Y;
966    
967            if(OSD_X < 0)
968                mx -= (osd->widget->allocation.width - OSD_W);
969    
970            if(OSD_Y < 0)
971                my -= (osd->widget->allocation.height - OSD_H);
972    
973            /* first do a rough test for the OSD area. */
974            /* this is just to avoid an unnecessary detailed test */
975            if(mx > 0 && mx < OSD_W && my > 0 && my < OSD_H) {
976    #ifndef OSD_NO_DPAD
977                but = osd_check_dpad(mx, my);
978    #endif
979            }
980    
981            if(but == OSD_NONE)
982                but = osd_check_zoom(mx, my);
983        }
984    
985    #ifdef OSD_BALLOON
986        if(but == OSD_NONE) {
987            /* check if user clicked into balloon */
988            if(osd_balloon_check(osd, down, x, y))
989                but = OSD_BG;
990        }
991    #endif
992    
993        return but;
994    }
995    
996    #ifndef OSD_NO_DPAD
997    static void
998    osd_dpad_labels(cairo_t *cr, gint x, gint y) {
999      /* move reference to dpad center */      /* move reference to dpad center */
1000      x += D_RAD;      x += D_RAD;
1001      y += D_RAD;      y += D_RAD;
# Line 256  osm_gps_map_osd_dpad_labels(cairo_t *cr, Line 1018  osm_gps_map_osd_dpad_labels(cairo_t *cr,
1018          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]);
1019      }      }
1020  }  }
1021    #endif
1022    
1023  /* draw the sattelite dish icon in the center of the dpad */  #ifdef OSD_GPS_BUTTON
1024  #define GPS_V0  (D_RAD/8)  /* draw the satellite dish icon in the center of the dpad */
1025    #define GPS_V0  (D_RAD/7)
1026  #define GPS_V1  (D_RAD/10)  #define GPS_V1  (D_RAD/10)
1027  #define GPS_V2  (D_RAD/5)  #define GPS_V2  (D_RAD/5)
1028    
1029  /* draw a satellite receiver dish */  /* draw a satellite receiver dish */
1030    /* this is either drawn in the center of the dpad (if present) */
1031    /* or in the middle of the zoom area */
1032  static void  static void
1033  osm_gps_map_osd_dpad_gps(cairo_t *cr, gint x, gint y) {  osd_dpad_gps(cairo_t *cr, gint x, gint y) {
1034      /* move reference to dpad center */      /* move reference to dpad center */
1035      x += D_RAD;      x += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD * 3;
1036      y += D_RAD + GPS_V0;      y += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD + GPS_V0;
1037    
1038      cairo_move_to (cr, x-GPS_V0, y+GPS_V0);      cairo_move_to (cr, x-GPS_V0, y+GPS_V0);
1039      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 1048  osm_gps_map_osd_dpad_gps(cairo_t *cr, gi
1048      cairo_move_to (cr, x, y-GPS_V2);      cairo_move_to (cr, x, y-GPS_V2);
1049      cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);      cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);
1050  }  }
1051    #endif
1052    
1053  #define Z_LEN  (2*Z_RAD/3)  #define Z_LEN  (2*Z_RAD/3)
1054    
1055  static void  static void
1056  osm_gps_map_osd_zoom_labels(cairo_t *cr, gint x, gint y) {  osd_zoom_labels(cairo_t *cr, gint x, gint y) {
1057      cairo_move_to (cr, x + Z_LEFT  - Z_LEN, y + Z_MID);      cairo_move_to (cr, x + Z_LEFT  - Z_LEN, y + Z_MID);
1058      cairo_line_to (cr, x + Z_LEFT  + Z_LEN, y + Z_MID);      cairo_line_to (cr, x + Z_LEFT  + Z_LEN, y + Z_MID);
1059    
# Line 296  osm_gps_map_osd_zoom_labels(cairo_t *cr, Line 1063  osm_gps_map_osd_zoom_labels(cairo_t *cr,
1063      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);
1064  }  }
1065    
1066    #ifdef OSD_COORDINATES
1067    
1068    #ifndef OSD_COORDINATES_FONT_SIZE
1069    #define OSD_COORDINATES_FONT_SIZE 12
1070    #endif
1071    
1072    #define OSD_COORDINATES_OFFSET (OSD_COORDINATES_FONT_SIZE/6)
1073    
1074    #define OSD_COORDINATES_W  (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET)
1075    #define OSD_COORDINATES_H  (2*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET+OSD_COORDINATES_FONT_SIZE/4)
1076    
1077    /* these can be overwritten with versions that support */
1078    /* localization */
1079    #ifndef OSD_COORDINATES_CHR_N
1080    #define OSD_COORDINATES_CHR_N  "N"
1081    #endif
1082    #ifndef OSD_COORDINATES_CHR_S
1083    #define OSD_COORDINATES_CHR_S  "S"
1084    #endif
1085    #ifndef OSD_COORDINATES_CHR_E
1086    #define OSD_COORDINATES_CHR_E  "E"
1087    #endif
1088    #ifndef OSD_COORDINATES_CHR_W
1089    #define OSD_COORDINATES_CHR_W  "W"
1090    #endif
1091    
1092    
1093    
1094    /* this is the classic geocaching notation */
1095    static char
1096    *osd_latitude_str(float latitude) {
1097        char *c = OSD_COORDINATES_CHR_N;
1098        float integral, fractional;
1099    
1100        if(isnan(latitude))
1101            return NULL;
1102    
1103        if(latitude < 0) {
1104            latitude = fabs(latitude);
1105            c = OSD_COORDINATES_CHR_S;
1106        }
1107    
1108        fractional = modff(latitude, &integral);
1109    
1110        return g_strdup_printf("%s %02d° %06.3f'",
1111                               c, (int)integral, fractional*60.0);
1112    }
1113    
1114    static char
1115    *osd_longitude_str(float longitude) {
1116        char *c = OSD_COORDINATES_CHR_E;
1117        float integral, fractional;
1118    
1119        if(isnan(longitude))
1120            return NULL;
1121    
1122        if(longitude < 0) {
1123            longitude = fabs(longitude);
1124            c = OSD_COORDINATES_CHR_W;
1125        }
1126    
1127        fractional = modff(longitude, &integral);
1128    
1129        return g_strdup_printf("%s %03d° %06.3f'",
1130                               c, (int)integral, fractional*60.0);
1131    }
1132    
1133    /* render a string at the given screen position */
1134    static int
1135    osd_render_centered_text(cairo_t *cr, int y, int width, char *text) {
1136        char *p = g_strdup(text);
1137        cairo_text_extents_t extents;
1138        cairo_text_extents (cr, p, &extents);
1139    
1140        /* check if text needs to be truncated */
1141        int len = strlen(text)-2;
1142        while(extents.width > width) {
1143            len--;
1144            strcpy(p+len, "...");
1145            cairo_text_extents (cr, p, &extents);
1146        }
1147    
1148        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
1149        cairo_set_line_width (cr, OSD_COORDINATES_FONT_SIZE/6);
1150        cairo_move_to (cr, (width - extents.width)/2, y - extents.y_bearing);
1151        cairo_text_path (cr, p);
1152        cairo_stroke (cr);
1153    
1154        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
1155        cairo_move_to (cr, (width - extents.width)/2, y - extents.y_bearing);
1156        cairo_show_text (cr, p);
1157    
1158        g_free(p);
1159    
1160        /* skip + 1/4 line */
1161        return y + 5*OSD_COORDINATES_FONT_SIZE/4;
1162    }
1163    
1164  static void  static void
1165  osm_gps_map_osd_labels(cairo_t *cr, gint width, gboolean enabled) {  osd_render_coordinates(osm_gps_map_osd_t *osd)
1166      if(enabled)  cairo_set_source_rgb (cr, OSD_COLOR);  {
1167      else         cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);      osd_priv_t *priv = (osd_priv_t*)osd->priv;
1168      cairo_set_line_width (cr, width);  
1169        /* get current map position */
1170        gfloat lat, lon;
1171        g_object_get(osd->widget, "latitude", &lat, "longitude", &lon, NULL);
1172    
1173        /* check if position has changed enough to require redraw */
1174        if(!isnan(priv->coordinates.lat) && !isnan(priv->coordinates.lon))
1175            /* 1/60000 == 1/1000 minute */
1176            if((fabsf(lat - priv->coordinates.lat) < 1/60000) &&
1177               (fabsf(lon - priv->coordinates.lon) < 1/60000))
1178                return;
1179    
1180        priv->coordinates.lat = lat;
1181        priv->coordinates.lon = lon;
1182    
1183        /* first fill with transparency */
1184        cairo_t *cr = cairo_create(priv->coordinates.surface);
1185        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1186        //    cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 0.5);
1187        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
1188        cairo_paint(cr);
1189        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1190    
1191        cairo_select_font_face (cr, "Sans",
1192                                CAIRO_FONT_SLANT_NORMAL,
1193                                CAIRO_FONT_WEIGHT_BOLD);
1194        cairo_set_font_size (cr, OSD_COORDINATES_FONT_SIZE);
1195    
1196        char *latitude = osd_latitude_str(lat);
1197        char *longitude = osd_longitude_str(lon);
1198    
1199        int y = OSD_COORDINATES_OFFSET;
1200        y = osd_render_centered_text(cr, y, OSD_COORDINATES_W, latitude);
1201        y = osd_render_centered_text(cr, y, OSD_COORDINATES_W, longitude);
1202    
1203        g_free(latitude);
1204        g_free(longitude);
1205    
1206        cairo_destroy(cr);
1207    }
1208    #endif  // OSD_COORDINATES
1209    
1210    #ifdef OSD_NAV
1211    #define OSD_NAV_W  (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET)
1212    #define OSD_NAV_H  (130)
1213    
1214    /* http://mathforum.org/library/drmath/view/55417.html */
1215    static float get_bearing(float lat1, float lon1, float lat2, float lon2) {
1216      return atan2( sin(lon2 - lon1) * cos(lat2),
1217                    cos(lat1) * sin(lat2) -
1218                    sin(lat1) * cos(lat2) * cos(lon2 - lon1));
1219    }
1220    
1221    /* http://mathforum.org/library/drmath/view/51722.html */
1222    static float get_distance(float lat1, float lon1, float lat2, float lon2) {
1223      float aob = acos(cos(lat1) * cos(lat2) * cos(lon2 - lon1) +
1224                       sin(lat1) * sin(lat2));
1225    
1226      //  return(aob * 3959.0);   /* great circle radius in miles */
1227    
1228      return(aob * 6371000.0);     /* great circle radius in meters */
1229    }
1230    
1231    static void
1232    osd_render_nav(osm_gps_map_osd_t *osd)
1233    {
1234        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1235    
1236        if(!priv->nav.surface || isnan(priv->nav.lat) || isnan(priv->nav.lon))
1237            return;
1238    
1239        /* first fill with transparency */
1240        cairo_t *cr = cairo_create(priv->nav.surface);
1241        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1242        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
1243        cairo_paint(cr);
1244        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1245    
1246        cairo_select_font_face (cr, "Sans",
1247                                CAIRO_FONT_SLANT_NORMAL,
1248                                CAIRO_FONT_WEIGHT_BOLD);
1249        cairo_set_font_size (cr, OSD_COORDINATES_FONT_SIZE);
1250    
1251        char *latitude = osd_latitude_str(priv->nav.lat);
1252        char *longitude = osd_longitude_str(priv->nav.lon);
1253    
1254        int y = OSD_COORDINATES_OFFSET;
1255        y = osd_render_centered_text(cr, y, OSD_NAV_W, priv->nav.name);
1256        y = osd_render_centered_text(cr, y, OSD_NAV_W, latitude);
1257        y = osd_render_centered_text(cr, y, OSD_NAV_W, longitude);
1258    
1259        g_free(latitude);
1260        g_free(longitude);
1261    
1262        /* draw the compass */
1263        int radius = (OSD_NAV_H - y - 5*OSD_COORDINATES_FONT_SIZE/4)/2;
1264        if(radius > OSD_NAV_W/2)
1265            radius = OSD_NAV_W/2;
1266    
1267        int x = OSD_NAV_W/2+1;
1268        y += radius;
1269    
1270      cairo_stroke (cr);      cairo_stroke (cr);
1271    
1272        /* draw background */
1273        cairo_arc(cr, x, y, radius, 0,  2*M_PI);
1274        cairo_set_source_rgba (cr, 1, 1, 1, 0.5);
1275        cairo_fill_preserve (cr);
1276        cairo_set_source_rgb (cr, 0, 0, 0);
1277        cairo_set_line_width (cr, 1);
1278        cairo_stroke (cr);
1279    
1280        /* draw pointer */
1281    #define ARROW_WIDTH     0.3
1282    #define ARROW_LENGTH    0.7
1283    
1284        coord_t *gps = osm_gps_map_get_gps (OSM_GPS_MAP(osd->widget));
1285        if(gps) {
1286            float arot = get_bearing(gps->rlat, gps->rlon,
1287                         deg2rad(priv->nav.lat), deg2rad(priv->nav.lon));
1288    
1289            cairo_move_to(cr,
1290                          x + radius *  ARROW_LENGTH *  sin(arot),
1291                          y + radius *  ARROW_LENGTH * -cos(arot));
1292    
1293            cairo_line_to(cr,
1294                          x + radius * -ARROW_LENGTH *  sin(arot+ARROW_WIDTH),
1295                          y + radius * -ARROW_LENGTH * -cos(arot+ARROW_WIDTH));
1296    
1297            cairo_line_to(cr,
1298                          x + radius * -0.5 * ARROW_LENGTH *  sin(arot),
1299                          y + radius * -0.5 * ARROW_LENGTH * -cos(arot));
1300    
1301            cairo_line_to(cr,
1302                          x + radius * -ARROW_LENGTH *  sin(arot-ARROW_WIDTH),
1303                          y + radius * -ARROW_LENGTH * -cos(arot-ARROW_WIDTH));
1304    
1305            cairo_close_path(cr);
1306            cairo_set_source_rgb (cr, 0, 0, 0);
1307            cairo_fill (cr);
1308    
1309            y += radius + OSD_COORDINATES_FONT_SIZE/4;
1310    
1311            float dist = get_distance(gps->rlat, gps->rlon,
1312                            deg2rad(priv->nav.lat), deg2rad(priv->nav.lon));
1313    
1314            char *dist_str = NULL;
1315            if(dist<1000)
1316                dist_str = g_strdup_printf("%u m", (int)dist);
1317            else
1318                dist_str = g_strdup_printf("%.1f km", dist/1000);
1319    
1320            y = osd_render_centered_text(cr, y, OSD_NAV_W, dist_str);
1321            g_free(dist_str);
1322        }
1323    
1324        cairo_destroy(cr);
1325  }  }
1326    
1327  static void  void osm_gps_map_osd_clear_nav (OsmGpsMap *map) {
1328  osm_gps_map_osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {      g_return_if_fail (OSM_IS_GPS_MAP (map));
1329      cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);  
1330      cairo_set_line_width (cr, width);      osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1331        g_return_if_fail (osd);
1332    
1333        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1334        g_return_if_fail (priv);
1335    
1336        if(priv->nav.surface) {
1337            cairo_surface_destroy(priv->nav.surface);
1338            priv->nav.surface = NULL;
1339            priv->nav.lat = OSM_GPS_MAP_INVALID;
1340            priv->nav.lon = OSM_GPS_MAP_INVALID;
1341            if(priv->nav.name) g_free(priv->nav.name);
1342        }
1343        osm_gps_map_redraw(map);
1344    }
1345    
1346    void
1347    osm_gps_map_osd_draw_nav (OsmGpsMap *map, float latitude, float longitude,
1348                              char *name) {
1349        g_return_if_fail (OSM_IS_GPS_MAP (map));
1350    
1351        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1352        g_return_if_fail (osd);
1353    
1354        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1355        g_return_if_fail (priv);
1356    
1357        osm_gps_map_osd_clear_nav (map);
1358    
1359        /* allocate balloon surface */
1360        priv->nav.surface =
1361            cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1362                                       OSD_NAV_W+2, OSD_NAV_H+2);
1363    
1364        priv->nav.lat = latitude;
1365        priv->nav.lon = longitude;
1366        priv->nav.name = g_strdup(name);
1367    
1368        osd_render_nav(osd);
1369    
1370        osm_gps_map_redraw(map);
1371    }
1372    
1373    #endif // OSD_NAV
1374    
1375    
1376    #ifdef OSD_CROSSHAIR
1377    
1378    #ifndef OSD_CROSSHAIR_RADIUS
1379    #define OSD_CROSSHAIR_RADIUS 10
1380    #endif
1381    
1382    #define OSD_CROSSHAIR_TICK  (OSD_CROSSHAIR_RADIUS/2)
1383    #define OSD_CROSSHAIR_BORDER (OSD_CROSSHAIR_TICK + OSD_CROSSHAIR_RADIUS/4)
1384    #define OSD_CROSSHAIR_W  ((OSD_CROSSHAIR_RADIUS+OSD_CROSSHAIR_BORDER)*2)
1385    #define OSD_CROSSHAIR_H  ((OSD_CROSSHAIR_RADIUS+OSD_CROSSHAIR_BORDER)*2)
1386    
1387    static void
1388    osd_render_crosshair_shape(cairo_t *cr) {
1389        cairo_arc (cr, OSD_CROSSHAIR_W/2, OSD_CROSSHAIR_H/2,
1390                   OSD_CROSSHAIR_RADIUS, 0,  2*M_PI);
1391    
1392        cairo_move_to (cr, OSD_CROSSHAIR_W/2 - OSD_CROSSHAIR_RADIUS,
1393                       OSD_CROSSHAIR_H/2);
1394        cairo_rel_line_to (cr, -OSD_CROSSHAIR_TICK, 0);
1395        cairo_move_to (cr, OSD_CROSSHAIR_W/2 + OSD_CROSSHAIR_RADIUS,
1396                       OSD_CROSSHAIR_H/2);
1397        cairo_rel_line_to (cr,  OSD_CROSSHAIR_TICK, 0);
1398    
1399        cairo_move_to (cr, OSD_CROSSHAIR_W/2,
1400                       OSD_CROSSHAIR_H/2 - OSD_CROSSHAIR_RADIUS);
1401        cairo_rel_line_to (cr, 0, -OSD_CROSSHAIR_TICK);
1402        cairo_move_to (cr, OSD_CROSSHAIR_W/2,
1403                       OSD_CROSSHAIR_H/2 + OSD_CROSSHAIR_RADIUS);
1404        cairo_rel_line_to (cr, 0, OSD_CROSSHAIR_TICK);
1405    
1406      cairo_stroke (cr);      cairo_stroke (cr);
1407  }  }
1408    
1409  static void  static void
1410  osm_gps_map_osd_render(OsmGpsMapPrivate *priv) {  osd_render_crosshair(osm_gps_map_osd_t *osd)
1411    {
1412        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1413    
1414        if(priv->crosshair.rendered)
1415            return;
1416    
1417        priv->crosshair.rendered = TRUE;
1418    
1419      /* first fill with transparency */      /* first fill with transparency */
1420      cairo_t *cr = cairo_create(priv->osd.overlay);      cairo_t *cr = cairo_create(priv->crosshair.surface);
1421        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1422        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
1423        cairo_paint(cr);
1424        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1425    
1426        cairo_set_line_cap  (cr, CAIRO_LINE_CAP_ROUND);
1427    
1428        cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.5);
1429        cairo_set_line_width (cr, OSD_CROSSHAIR_RADIUS/2);
1430        osd_render_crosshair_shape(cr);
1431    
1432        cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.5);
1433        cairo_set_line_width (cr, OSD_CROSSHAIR_RADIUS/4);
1434        osd_render_crosshair_shape(cr);
1435    
1436        cairo_destroy(cr);
1437    }
1438    #endif
1439    
1440    #ifdef OSD_SCALE
1441    
1442    #ifndef OSD_SCALE_FONT_SIZE
1443    #define OSD_SCALE_FONT_SIZE 12
1444    #endif
1445    #define OSD_SCALE_W   (10*OSD_SCALE_FONT_SIZE)
1446    #define OSD_SCALE_H   (5*OSD_SCALE_FONT_SIZE/2)
1447    
1448    /* various parameters used to create the scale */
1449    #define OSD_SCALE_H2   (OSD_SCALE_H/2)
1450    #define OSD_SCALE_TICK (2*OSD_SCALE_FONT_SIZE/3)
1451    #define OSD_SCALE_M    (OSD_SCALE_H2 - OSD_SCALE_TICK)
1452    #define OSD_SCALE_I    (OSD_SCALE_H2 + OSD_SCALE_TICK)
1453    #define OSD_SCALE_FD   (OSD_SCALE_FONT_SIZE/4)
1454    
1455    static void
1456    osd_render_scale(osm_gps_map_osd_t *osd)
1457    {
1458        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1459    
1460        /* this only needs to be rendered if the zoom has changed */
1461        gint zoom;
1462        g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);
1463        if(zoom == priv->scale.zoom)
1464            return;
1465    
1466        priv->scale.zoom = zoom;
1467    
1468        float m_per_pix = osm_gps_map_get_scale(OSM_GPS_MAP(osd->widget));
1469    
1470        /* first fill with transparency */
1471        cairo_t *cr = cairo_create(priv->scale.surface);
1472      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1473      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);
1474        // pink for testing:    cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2);
1475      cairo_paint(cr);      cairo_paint(cr);
1476        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1477    
1478        /* determine the size of the scale width in meters */
1479        float width = (OSD_SCALE_W-OSD_SCALE_FONT_SIZE/6) * m_per_pix;
1480    
1481        /* scale this to useful values */
1482        int exp = logf(width)*M_LOG10E;
1483        int mant = width/pow(10,exp);
1484        int width_metric = mant * pow(10,exp);
1485        char *dist_str = NULL;
1486        if(width_metric<1000)
1487            dist_str = g_strdup_printf("%u m", width_metric);
1488        else
1489            dist_str = g_strdup_printf("%u km", width_metric/1000);
1490        width_metric /= m_per_pix;
1491    
1492        /* and now the hard part: scale for useful imperial values :-( */
1493        /* try to convert to feet, 1ft == 0.3048 m */
1494        width /= 0.3048;
1495        float imp_scale = 0.3048;
1496        char *dist_imp_unit = "ft";
1497    
1498        if(width >= 100) {
1499            /* 1yd == 3 feet */
1500            width /= 3.0;
1501            imp_scale *= 3.0;
1502            dist_imp_unit = "yd";
1503    
1504            if(width >= 1760.0) {
1505                /* 1mi == 1760 yd */
1506                width /= 1760.0;
1507                imp_scale *= 1760.0;
1508                dist_imp_unit = "mi";
1509            }
1510        }
1511    
1512        /* also convert this to full tens/hundreds */
1513        exp = logf(width)*M_LOG10E;
1514        mant = width/pow(10,exp);
1515        int width_imp = mant * pow(10,exp);
1516        char *dist_str_imp = g_strdup_printf("%u %s", width_imp, dist_imp_unit);
1517    
1518        /* convert back to pixels */
1519        width_imp *= imp_scale;
1520        width_imp /= m_per_pix;
1521    
1522        cairo_select_font_face (cr, "Sans",
1523                                CAIRO_FONT_SLANT_NORMAL,
1524                                CAIRO_FONT_WEIGHT_BOLD);
1525        cairo_set_font_size (cr, OSD_SCALE_FONT_SIZE);
1526        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
1527    
1528        cairo_text_extents_t extents;
1529        cairo_text_extents (cr, dist_str, &extents);
1530    
1531        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
1532        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6);
1533        cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD);
1534        cairo_text_path (cr, dist_str);
1535        cairo_stroke (cr);
1536        cairo_move_to (cr, 2*OSD_SCALE_FD,
1537                       OSD_SCALE_H2+OSD_SCALE_FD + extents.height);
1538        cairo_text_path (cr, dist_str_imp);
1539        cairo_stroke (cr);
1540    
1541        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
1542        cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD);
1543        cairo_show_text (cr, dist_str);
1544        cairo_move_to (cr, 2*OSD_SCALE_FD,
1545                       OSD_SCALE_H2+OSD_SCALE_FD + extents.height);
1546        cairo_show_text (cr, dist_str_imp);
1547    
1548        g_free(dist_str);
1549        g_free(dist_str_imp);
1550    
1551        /* draw white line */
1552        cairo_set_line_cap  (cr, CAIRO_LINE_CAP_ROUND);
1553        cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);
1554        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/3);
1555        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M);
1556        cairo_rel_line_to (cr, 0,  OSD_SCALE_TICK);
1557        cairo_rel_line_to (cr, width_metric, 0);
1558        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1559        cairo_stroke(cr);
1560        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I);
1561        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1562        cairo_rel_line_to (cr, width_imp, 0);
1563        cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK);
1564        cairo_stroke(cr);
1565    
1566        /* draw black line */
1567        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
1568        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6);
1569        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M);
1570        cairo_rel_line_to (cr, 0,  OSD_SCALE_TICK);
1571        cairo_rel_line_to (cr, width_metric, 0);
1572        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1573        cairo_stroke(cr);
1574        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I);
1575        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1576        cairo_rel_line_to (cr, width_imp, 0);
1577        cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK);
1578        cairo_stroke(cr);
1579    
1580        cairo_destroy(cr);
1581    }
1582    #endif
1583    
1584    static void
1585    osd_render_controls(osm_gps_map_osd_t *osd)
1586    {
1587        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1588    
1589        if(priv->controls.rendered
1590    #ifdef OSD_GPS_BUTTON
1591           && (priv->controls.gps_enabled == (osd->cb != NULL))
1592    #endif
1593           )
1594            return;
1595    
1596    #ifdef OSD_GPS_BUTTON
1597        priv->controls.gps_enabled = (osd->cb != NULL);
1598    #endif
1599        priv->controls.rendered = TRUE;
1600    
1601    #ifndef OSD_COLOR
1602        GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
1603        GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
1604        GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
1605    #endif
1606    
1607        /* first fill with transparency */
1608        cairo_t *cr = cairo_create(priv->controls.surface);
1609        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1610        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
1611        cairo_paint(cr);
1612      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1613    
1614      /* --------- draw zoom and dpad shape shadow ----------- */      /* --------- draw zoom and dpad shape shadow ----------- */
1615      gint x = 0, y = 0;  #ifdef OSD_SHADOW_ENABLE
1616        osd_zoom_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
1617      osm_gps_map_osd_zoom_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);      osd_shape_shadow(cr);
1618      osm_gps_map_osd_shape_shadow(cr);  #ifndef OSD_NO_DPAD
1619      osm_gps_map_osd_dpad_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);      osd_dpad_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
1620      osm_gps_map_osd_shape_shadow(cr);      osd_shape_shadow(cr);
1621    #endif
1622    #endif
1623    
1624      /* --------- draw zoom and dpad shape ----------- */      /* --------- draw zoom and dpad shape ----------- */
1625    
1626      osm_gps_map_osd_zoom_shape(cr, x, y);      osd_zoom_shape(cr, 1, 1);
1627      osm_gps_map_osd_shape(cr);  #ifndef OSD_COLOR
1628      osm_gps_map_osd_dpad_shape(cr, x, y);      osd_shape(cr, &bg, &fg);
1629      osm_gps_map_osd_shape(cr);  #else
1630        osd_shape(cr);
1631    #endif
1632    #ifndef OSD_NO_DPAD
1633        osd_dpad_shape(cr, 1, 1);
1634    #ifndef OSD_COLOR
1635        osd_shape(cr, &bg, &fg);
1636    #else
1637        osd_shape(cr);
1638    #endif
1639    #endif
1640    
1641      /* --------- draw zoom and dpad labels --------- */      /* --------- draw zoom and dpad labels --------- */
1642    
1643      osm_gps_map_osd_zoom_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);  #ifdef OSD_SHADOW_ENABLE
1644      osm_gps_map_osd_dpad_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);      osd_labels_shadow(cr, Z_RAD/3, TRUE);
1645      osm_gps_map_osd_labels_shadow(cr, Z_RAD/3, TRUE);      osd_zoom_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
1646      osm_gps_map_osd_dpad_gps(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);  #ifndef OSD_NO_DPAD
1647      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);
1648    #endif
1649      osm_gps_map_osd_zoom_labels(cr, x, y);      cairo_stroke(cr);
1650      osm_gps_map_osd_dpad_labels(cr, x, y);  #ifdef OSD_GPS_BUTTON
1651      osm_gps_map_osd_labels(cr, Z_RAD/3, TRUE);      osd_labels_shadow(cr, Z_RAD/6, osd->cb != NULL);
1652      osm_gps_map_osd_dpad_gps(cr, x, y);      osd_dpad_gps(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
1653      osm_gps_map_osd_labels(cr, Z_RAD/6, priv->osd.cb != NULL);      cairo_stroke(cr);
1654    #endif
1655    #endif
1656    
1657    #ifndef OSD_COLOR
1658        osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
1659    #else
1660        osd_labels(cr, Z_RAD/3, TRUE);
1661    #endif
1662        osd_zoom_labels(cr, 1, 1);
1663    #ifndef OSD_NO_DPAD
1664        osd_dpad_labels(cr, 1, 1);
1665    #endif
1666        cairo_stroke(cr);
1667    
1668    #ifndef OSD_COLOR
1669        osd_labels(cr, Z_RAD/6, osd->cb != NULL, &fg, &da);
1670    #else
1671        osd_labels(cr, Z_RAD/6, osd->cb != NULL);
1672    #endif
1673    #ifdef OSD_GPS_BUTTON
1674        osd_dpad_gps(cr, 1, 1);
1675    #endif
1676        cairo_stroke(cr);
1677    
1678      cairo_destroy(cr);      cairo_destroy(cr);
1679  }  }
1680    
1681  static void  static void
1682  osm_gps_map_osd_draw_controls (OsmGpsMap *map, gint xoffset, gint yoffset)  osd_render(osm_gps_map_osd_t *osd)
1683  {  {
1684      OsmGpsMapPrivate *priv = map->priv;      /* this function is actually called pretty often since the */
1685        /* OSD contents may have changed (due to a coordinate/zoom change). */
1686        /* The different OSD parts have to make sure that they don't */
1687        /* render unneccessarily often and thus waste CPU power */
1688    
1689        osd_render_controls(osd);
1690    
1691    #ifdef OSD_SOURCE_SEL
1692        osd_render_source_sel(osd, FALSE);
1693    #endif
1694    
1695      /* backup previous contents */  #ifdef OSD_SCALE
1696      if(!priv->osd.backup)      osd_render_scale(osd);
1697          priv->osd.backup = gdk_pixmap_new(priv->pixmap, OSD_W+2, OSD_H+2, -1);  #endif
1698    
1699    #ifdef OSD_CROSSHAIR
1700        osd_render_crosshair(osd);
1701    #endif
1702    
1703      gint x = OSD_X + EXTRA_BORDER + xoffset;  #ifdef OSD_NAV
1704      gint y = OSD_Y + EXTRA_BORDER + yoffset;      osd_render_nav(osd);
1705    #endif
1706    
1707      /* create backup of background */  #ifdef OSD_COORDINATES
1708      gdk_draw_drawable(priv->osd.backup,      osd_render_coordinates(osd);
1709          GTK_WIDGET(map)->style->fg_gc[GTK_WIDGET_STATE(GTK_WIDGET(map))],  #endif
1710                        priv->pixmap, x-1, y-1, 0, 0, OSD_W+2, OSD_H+2);  }
1711    
1712      priv->osd.backup_x = x-1;  static void
1713      priv->osd.backup_y = y-1;  osd_draw(osm_gps_map_osd_t *osd, GdkDrawable *drawable)
1714    {
1715        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1716    
1717      /* OSD itself uses some off-screen rendering, so check if the */      /* OSD itself uses some off-screen rendering, so check if the */
1718      /* offscreen buffer is present and create it if not */      /* offscreen buffer is present and create it if not */
1719      if(!priv->osd.overlay) {      if(!priv->controls.surface) {
1720          /* create overlay ... */          /* create overlay ... */
1721          priv->osd.overlay =          priv->controls.surface =
1722              cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W, OSD_H);              cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W+2, OSD_H+2);
1723    
1724            priv->controls.rendered = FALSE;
1725    #ifdef OSD_GPS_BUTTON
1726            priv->controls.gps_enabled = FALSE;
1727    #endif
1728    
1729    #ifdef OSD_SOURCE_SEL
1730            /* the initial OSD state is alway not-expanded */
1731            priv->source_sel.surface =
1732                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1733                                               OSD_S_W+2, OSD_S_H+2);
1734            priv->source_sel.rendered = FALSE;
1735    #endif
1736    
1737    #ifdef OSD_SCALE
1738            priv->scale.surface =
1739                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1740                                           OSD_SCALE_W, OSD_SCALE_H);
1741            priv->scale.zoom = -1;
1742    #endif
1743    
1744    #ifdef OSD_CROSSHAIR
1745            priv->crosshair.surface =
1746                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1747                                           OSD_CROSSHAIR_W, OSD_CROSSHAIR_H);
1748            priv->crosshair.rendered = FALSE;
1749    #endif
1750    
1751    #ifdef OSD_COORDINATES
1752            priv->coordinates.surface =
1753                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1754                                           OSD_COORDINATES_W, OSD_COORDINATES_H);
1755    
1756            priv->coordinates.lat = priv->coordinates.lon = OSM_GPS_MAP_INVALID;
1757    #endif
1758    
1759          /* ... and render it */          /* ... and render it */
1760          osm_gps_map_osd_render(priv);          osd_render(osd);
1761      }      }
1762    
1763      // now draw this onto the original context      // now draw this onto the original context
1764      cairo_t *cr = gdk_cairo_create(priv->pixmap);      cairo_t *cr = gdk_cairo_create(drawable);
1765      cairo_set_source_surface(cr, priv->osd.overlay, x, y);  
1766        gint x, y;
1767    
1768    #ifdef OSD_SCALE
1769        x =  OSD_X;
1770        y = -OSD_Y;
1771        if(x < 0) x += osd->widget->allocation.width - OSD_SCALE_W;
1772        if(y < 0) y += osd->widget->allocation.height - OSD_SCALE_H;
1773    
1774        cairo_set_source_surface(cr, priv->scale.surface, x, y);
1775      cairo_paint(cr);      cairo_paint(cr);
1776    #endif
1777    
1778    #ifdef OSD_CROSSHAIR
1779        x = (osd->widget->allocation.width - OSD_CROSSHAIR_W)/2;
1780        y = (osd->widget->allocation.height - OSD_CROSSHAIR_H)/2;
1781    
1782        cairo_set_source_surface(cr, priv->crosshair.surface, x, y);
1783        cairo_paint(cr);
1784    #endif
1785    
1786    #ifdef OSD_NAV
1787        if(priv->nav.surface) {
1788            x =  OSD_X;
1789            if(x < 0) x += osd->widget->allocation.width - OSD_NAV_W;
1790            y = (osd->widget->allocation.height - OSD_NAV_H)/2;
1791    
1792            cairo_set_source_surface(cr, priv->nav.surface, x, y);
1793            cairo_paint(cr);
1794        }
1795    #endif
1796    
1797    #ifdef OSD_COORDINATES
1798        x = -OSD_X;
1799        y = -OSD_Y;
1800        if(x < 0) x += osd->widget->allocation.width - OSD_COORDINATES_W;
1801        if(y < 0) y += osd->widget->allocation.height - OSD_COORDINATES_H;
1802    
1803        cairo_set_source_surface(cr, priv->coordinates.surface, x, y);
1804        cairo_paint(cr);
1805    #endif
1806    
1807    #ifdef OSD_BALLOON
1808        if(priv->balloon.surface) {
1809    
1810            /* convert given lat lon into screen coordinates */
1811            gint x, y;
1812            osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget),
1813                                          priv->balloon.lat, priv->balloon.lon,
1814                                          &x, &y);
1815    
1816            /* check if balloon needs to be rerendered */
1817            osd_render_balloon(osd);
1818    
1819            cairo_set_source_surface(cr, priv->balloon.surface,
1820                                     x + priv->balloon.offset_x,
1821                                     y + priv->balloon.offset_y);
1822            cairo_paint(cr);
1823        }
1824    #endif
1825    
1826        x = OSD_X;
1827        if(x < 0)
1828            x += osd->widget->allocation.width - OSD_W;
1829    
1830        y = OSD_Y;
1831        if(y < 0)
1832            y += osd->widget->allocation.height - OSD_H;
1833    
1834        cairo_set_source_surface(cr, priv->controls.surface, x, y);
1835        cairo_paint(cr);
1836    
1837    #ifdef OSD_SOURCE_SEL
1838        if(!priv->source_sel.handler_id) {
1839            /* the OSD source selection is not being animated */
1840            if(!priv->source_sel.expanded)
1841                x = osd->widget->allocation.width - OSD_S_W;
1842            else
1843                x = osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
1844        } else
1845            x = priv->source_sel.shift;
1846    
1847        y = OSD_S_Y;
1848        if(OSD_S_Y < 0) {
1849            if(!priv->source_sel.expanded)
1850                y = osd->widget->allocation.height - OSD_S_H + OSD_S_Y;
1851            else
1852                y = osd->widget->allocation.height - OSD_S_EXP_H + OSD_S_Y;
1853        }
1854    
1855        cairo_set_source_surface(cr, priv->source_sel.surface, x, y);
1856        cairo_paint(cr);
1857    #endif
1858    
1859      cairo_destroy(cr);      cairo_destroy(cr);
1860  }  }
1861    
1862  static void  static void
1863  osm_gps_map_osd_restore (OsmGpsMap *map)  osd_free(osm_gps_map_osd_t *osd)
1864  {  {
1865      OsmGpsMapPrivate *priv = map->priv;      osd_priv_t *priv = (osd_priv_t *)(osd->priv);
1866    
1867      /* restore backup of previous contents */      if (priv->controls.surface)
1868      if(priv->osd.backup) {           cairo_surface_destroy(priv->controls.surface);
1869          /* create backup of background */  
1870          gdk_draw_drawable(priv->pixmap,  #ifdef OSD_SOURCE_SEL
1871              GTK_WIDGET(map)->style->fg_gc[GTK_WIDGET_STATE(GTK_WIDGET(map))],      if(priv->source_sel.handler_id)
1872                        priv->osd.backup, 0, 0,          gtk_timeout_remove(priv->source_sel.handler_id);
1873                        priv->osd.backup_x, priv->osd.backup_y, OSD_W+2, OSD_H+2);  
1874      }      if (priv->source_sel.surface)
1875             cairo_surface_destroy(priv->source_sel.surface);
1876    #endif
1877    
1878    #ifdef OSD_SCALE
1879        if (priv->scale.surface)
1880             cairo_surface_destroy(priv->scale.surface);
1881    #endif
1882    
1883    #ifdef OSD_CROSSHAIR
1884        if (priv->crosshair.surface)
1885             cairo_surface_destroy(priv->crosshair.surface);
1886    #endif
1887    
1888    #ifdef OSD_NAV
1889        if (priv->nav.surface)
1890             cairo_surface_destroy(priv->nav.surface);
1891    #endif
1892    
1893    #ifdef OSD_COORDINATES
1894        if (priv->coordinates.surface)
1895             cairo_surface_destroy(priv->coordinates.surface);
1896    #endif
1897    
1898    #ifdef OSD_BALLOON
1899        if (priv->balloon.surface)
1900             cairo_surface_destroy(priv->balloon.surface);
1901    #endif
1902    
1903        g_free(priv);
1904  }  }
1905    
1906  static void  static gboolean
1907  osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdGpsCallback cb, gpointer data)  osd_busy(osm_gps_map_osd_t *osd)
1908  {  {
1909      OsmGpsMapPrivate *priv;  #ifdef OSD_SOURCE_SEL
1910        osd_priv_t *priv = (osd_priv_t *)(osd->priv);
1911        return (priv->source_sel.handler_id != 0);
1912    #else
1913        return FALSE;
1914    #endif
1915    }
1916    
1917      g_return_if_fail (OSM_IS_GPS_MAP (map));  static osm_gps_map_osd_t osd_classic = {
1918      priv = map->priv;      .widget     = NULL,
1919    
1920        .draw       = osd_draw,
1921        .check      = osd_check,
1922        .render     = osd_render,
1923        .free       = osd_free,
1924        .busy       = osd_busy,
1925    
1926      priv->osd.cb = cb;      .cb         = NULL,
1927      priv->osd.data = data;      .data       = NULL,
1928    
1929        .priv       = NULL
1930    };
1931    
1932    /* this is the only function that's externally visible */
1933    void
1934    osm_gps_map_osd_classic_init(OsmGpsMap *map)
1935    {
1936        osd_priv_t *priv = osd_classic.priv = g_new0(osd_priv_t, 1);
1937    
1938    #ifdef OSD_BALLOON
1939        priv->balloon.lat = OSM_GPS_MAP_INVALID;
1940        priv->balloon.lon = OSM_GPS_MAP_INVALID;
1941    #endif
1942    
1943        osd_classic.priv = priv;
1944    
1945        osm_gps_map_register_osd(map, &osd_classic);
1946    }
1947    
1948    #ifdef OSD_GPS_BUTTON
1949    /* below are osd specific functions which aren't used by osm-gps-map */
1950    /* but instead are to be used by the main application */
1951    void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb,
1952                                     gpointer data) {
1953        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1954        g_return_if_fail (osd);
1955    
1956        osd->cb = cb;
1957        osd->data = data;
1958    
1959      /* this may have changed the state of the gps button */      /* this may have changed the state of the gps button */
1960      /* we thus re-render the overlay */      /* we thus re-render the overlay */
1961      osm_gps_map_osd_render(priv);      osd->render(osd);
1962    
1963      osm_gps_map_map_redraw_idle(map);      osm_gps_map_redraw(map);
1964    }
1965    #endif
1966    
1967    osd_button_t
1968    osm_gps_map_osd_check(OsmGpsMap *map, gint x, gint y) {
1969        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1970        g_return_val_if_fail (osd, OSD_NONE);
1971    
1972        return osd_check(osd, TRUE, x, y);
1973  }  }
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Removed from v.71  
changed lines
  Added in v.132