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 112 by harbaum, Tue Sep 15 13:52:04 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 <math.h>    // M_PI/cos()
23    
24  /* parameters that can be overwritten from the config file: */  /* parameters that can be overwritten from the config file: */
25  /* OSM_GPS_MAP_OSD_DIAMETER */  /* OSD_DIAMETER */
26    /* OSD_X, OSD_Y */
27    
28  #ifndef USE_CAIRO  #ifndef USE_CAIRO
29  #error "OSD control display lacks a non-cairo implementation!"  #error "OSD control display lacks a non-cairo implementation!"
# Line 29  Line 32 
32  #include <cairo.h>  #include <cairo.h>
33    
34  #include "osm-gps-map.h"  #include "osm-gps-map.h"
35    #include "converter.h"
36    #include "osm-gps-map-osd-classic.h"
37    
38  //the osd controls  //the osd controls
39  typedef struct {  typedef struct {
40      GdkPixmap *backup;      /* the offscreen representation of the OSD */
41      gint backup_x, backup_y;      struct {
42            cairo_surface_t *surface;
43            gboolean rendered;
44    #ifdef OSD_GPS_BUTTON
45            gboolean gps_enabled;
46    #endif
47        } controls;
48    
49    #ifdef OSD_BALLOON
50        //a balloon with additional info
51        struct {
52            cairo_surface_t *surface;
53    
54            float lat, lon;
55            gboolean valid;
56            OsmGpsMapRect_t rect;
57    
58            /* function called to have the user app draw the contents */
59            OsmGpsMapBalloonCallback cb;
60            gpointer data;
61        } balloon;
62    #endif
63    
64    #ifdef OSD_SCALE
65        struct {
66            cairo_surface_t *surface;
67            int zoom;
68        } scale;
69    #endif
70    
71    #ifdef OSD_CROSSHAIR
72        struct {
73            cairo_surface_t *surface;
74            gboolean rendered;
75        } crosshair;
76    #endif
77    
78      cairo_surface_t *overlay;  #ifdef OSD_COORDINATES
79        struct {
80            cairo_surface_t *surface;
81            float lat, lon;
82        } coordinates;
83    #endif
84    
85    #ifdef OSD_SOURCE_SEL
86        struct {
87            /* values to handle the "source" menu */
88            cairo_surface_t *surface;
89            gboolean expanded;
90            gint shift, dir, count;
91            gint handler_id;
92            gint width, height;
93            gboolean rendered;
94        } source_sel;
95    #endif
96    
     OsmGpsMapOsdGpsCallback cb;  
     gpointer data;  
97  } osd_priv_t;  } osd_priv_t;
98    
99  /* the osd structure mainly contains various callbacks */  #ifdef OSD_BALLOON
100  /* required to draw and update the OSD */  /* most visual effects are hardcoded by now, but may be made */
101  typedef struct {  /* available via properties later */
102    #ifndef BALLOON_AREA_WIDTH
103    #define BALLOON_AREA_WIDTH           290
104    #endif
105    #ifndef BALLOON_AREA_HEIGHT
106    #define BALLOON_AREA_HEIGHT           75
107    #endif
108    #ifndef BALLOON_CORNER_RADIUS
109    #define BALLOON_CORNER_RADIUS         10
110    #endif
111    
112      void(enable_gps)(OsmGpsMap *, OsmGpsMapOsdGpsCallback, gpointer);  #define BALLOON_BORDER               (BALLOON_CORNER_RADIUS/2)
113      void(restore)(OsmGpsMap*);  #define BALLOON_WIDTH                (BALLOON_AREA_WIDTH + 2 * BALLOON_BORDER)
114      void(draw)(OsmGpsMap *, gint, gint);  #define BALLOON_HEIGHT               (BALLOON_AREA_HEIGHT + 2 * BALLOON_BORDER)
115      void(render)(OsmGpsMapPrivate *);  #define BALLOON_TRANSPARENCY         0.8
116      osd_button_t(*check)(gint, gint);       /* check if x/y lies within OSD */  #define POINTER_HEIGHT                20
117      void(free)(gpointer);  #define POINTER_FOOT_WIDTH            20
118    #define POINTER_OFFSET               (BALLOON_CORNER_RADIUS*3/4)
119    #define BALLOON_SHADOW               (BALLOON_CORNER_RADIUS/2)
120    #define BALLOON_SHADOW_TRANSPARENCY  0.2
121    
122      gpointer priv;  #define CLOSE_BUTTON_RADIUS   (BALLOON_CORNER_RADIUS)
 } osm_gps_map_osd_t;  
123    
124  static osm_gps_map_osd_t osd_classic = {  
125      .restore    = osm_gps_map_osd_restore,  /* draw the bubble shape. this is used twice, once for the shape and once */
126      .draw       = osm_gps_map_osd_draw_controls,  /* for the shadow */
127      .check      = osm_gps_map_osd_check,  static void
128      .render     = osm_gps_map_osd_render,  osm_gps_map_draw_balloon_shape (cairo_t *cr, int x0, int y0, int x1, int y1,
129      .enable_gps = osm_gps_map_osd_enable_gps,         gboolean bottom, int px, int py, int px0, int px1) {
130      .free       = osm_gps_map_osd_free,  
131      .priv       = NULL;      cairo_move_to (cr, x0, y0 + BALLOON_CORNER_RADIUS);
132        cairo_arc (cr, x0 + BALLOON_CORNER_RADIUS, y0 + BALLOON_CORNER_RADIUS,
133                   BALLOON_CORNER_RADIUS, -M_PI, -M_PI/2);
134        if(!bottom) {
135            /* insert top pointer */
136            cairo_line_to (cr, px1, y0);
137            cairo_line_to (cr, px, py);
138            cairo_line_to (cr, px0, y0);
139        }
140    
141        cairo_line_to (cr, x1 - BALLOON_CORNER_RADIUS, y0);
142        cairo_arc (cr, x1 - BALLOON_CORNER_RADIUS, y0 + BALLOON_CORNER_RADIUS,
143                   BALLOON_CORNER_RADIUS, -M_PI/2, 0);
144        cairo_line_to (cr, x1 , y1 - BALLOON_CORNER_RADIUS);
145        cairo_arc (cr, x1 - BALLOON_CORNER_RADIUS, y1 - BALLOON_CORNER_RADIUS,
146                   BALLOON_CORNER_RADIUS, 0, M_PI/2);
147        if(bottom) {
148            /* insert bottom pointer */
149            cairo_line_to (cr, px0, y1);
150            cairo_line_to (cr, px, py);
151            cairo_line_to (cr, px1, y1);
152        }
153    
154        cairo_line_to (cr, x0 + BALLOON_CORNER_RADIUS, y1);
155        cairo_arc (cr, x0 + BALLOON_CORNER_RADIUS, y1 - BALLOON_CORNER_RADIUS,
156                   BALLOON_CORNER_RADIUS, M_PI/2, M_PI);
157    
158        cairo_close_path (cr);
159  }  }
160    
161  /* this is the only function that's externally visible */  /* xyz */
162  osm_gps_map_osd_t *  
163  osm_gps_map_osd_classic_init(void)  static void
164    osd_render_balloon(osm_gps_map_osd_t *osd) {
165        osd_priv_t *priv = (osd_priv_t*)osd->priv;
166    
167        /* get zoom */
168        gint zoom;
169        g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);
170    
171        /* ------- convert given coordinate into screen position --------- */
172        gint x0, y0;
173        osm_gps_map_geographic_to_screen (OSM_GPS_MAP(osd->widget),
174                                          priv->balloon.lat, priv->balloon.lon,
175                                          &x0, &y0);
176    
177        /* check position of this relative to screen center to determine */
178        /* pointer direction ... */
179        int pointer_x = x0, pointer_x0, pointer_x1;
180        int pointer_y = y0;
181    
182        /* ... and calculate position */
183        if(x0 > osd->widget->allocation.width/2) {
184            x0 += POINTER_OFFSET;
185            pointer_x0 = pointer_x - (BALLOON_CORNER_RADIUS - POINTER_OFFSET);
186            pointer_x1 = pointer_x0 - POINTER_FOOT_WIDTH;
187        } else {
188            x0 -= POINTER_OFFSET;
189            pointer_x1 = pointer_x + (BALLOON_CORNER_RADIUS - POINTER_OFFSET);
190            pointer_x0 = pointer_x1 + POINTER_FOOT_WIDTH;
191        }
192    
193        gboolean bottom = FALSE;
194        if(y0 > osd->widget->allocation.height/2) {
195            bottom = TRUE;
196            y0 -= BALLOON_HEIGHT + POINTER_HEIGHT;
197        } else
198            y0 += POINTER_HEIGHT;
199    
200        /* calculate bottom/right of box */
201        int x1 = x0 + BALLOON_WIDTH, y1 = y0 + BALLOON_HEIGHT;
202    
203        /* save balloon screen coordinates for later use */
204        priv->balloon.rect.x = x0 + BALLOON_BORDER;
205        priv->balloon.rect.y = y0 + BALLOON_BORDER;
206        priv->balloon.rect.w = x1 - x0 - 2*BALLOON_BORDER;
207        priv->balloon.rect.h = y1 - y0 - 2*BALLOON_BORDER;
208    
209        cairo_t *cr = cairo_create(priv->balloon.surface);
210    
211        /* --------- draw shadow --------------- */
212        osm_gps_map_draw_balloon_shape (cr,
213                     x0 + BALLOON_SHADOW, y0 + BALLOON_SHADOW,
214                     x1 + BALLOON_SHADOW, y1 + BALLOON_SHADOW,
215                     bottom, pointer_x, pointer_y,
216                     pointer_x0 + BALLOON_SHADOW, pointer_x1 + BALLOON_SHADOW);
217    
218        cairo_set_source_rgba (cr, 0, 0, 0, BALLOON_SHADOW_TRANSPARENCY);
219        cairo_fill_preserve (cr);
220        cairo_set_source_rgba (cr, 1, 0, 0, 1.0);
221        cairo_set_line_width (cr, 0);
222        cairo_stroke (cr);
223    
224        /* --------- draw main shape ----------- */
225        osm_gps_map_draw_balloon_shape (cr, x0, y0, x1, y1,
226                     bottom, pointer_x, pointer_y, pointer_x0, pointer_x1);
227    
228        cairo_set_source_rgba (cr, 1, 1, 1, BALLOON_TRANSPARENCY);
229        cairo_fill_preserve (cr);
230        cairo_set_source_rgba (cr, 0, 0, 0, BALLOON_TRANSPARENCY);
231        cairo_set_line_width (cr, 1);
232        cairo_stroke (cr);
233    
234    
235        /* ---------- draw close button --------- */
236    
237        int cx = x1 - BALLOON_BORDER - CLOSE_BUTTON_RADIUS;
238        int cy = y0 + BALLOON_BORDER + CLOSE_BUTTON_RADIUS;
239        int crad = CLOSE_BUTTON_RADIUS;
240    
241        cairo_arc (cr, cx, cy, crad, 0, 2 * M_PI);
242        cairo_set_source_rgba (cr, 0.8, 0, 0, 1.0);
243        cairo_fill_preserve (cr);
244        cairo_set_source_rgba (cr, 0.3, 0, 0, 1.0);
245        cairo_set_line_width (cr, 2);
246        cairo_stroke(cr);
247    
248        cairo_set_source_rgba (cr, 1, 1, 1, 1.0);
249        cairo_set_line_width (cr, BALLOON_CORNER_RADIUS/3.3);
250        cairo_set_line_cap (cr, CAIRO_LINE_CAP_ROUND);
251        cairo_move_to (cr, cx - crad/2, cy - crad/2);
252        cairo_line_to (cr, cx + crad/2, cy + crad/2);
253        cairo_stroke (cr);
254        cairo_move_to (cr, cx + crad/2, cy - crad/2);
255        cairo_line_to (cr, cx - crad/2, cy + crad/2);
256        cairo_stroke (cr);
257    
258        if (priv->balloon.cb) {
259            /* clip in case application tries to draw in */
260                /* exceed of the balloon */
261            cairo_rectangle (cr, priv->balloon.rect.x, priv->balloon.rect.y,
262                             priv->balloon.rect.w, priv->balloon.rect.h);
263            cairo_clip (cr);
264            cairo_new_path (cr);  /* current path is not
265                                     consumed by cairo_clip() */
266    
267            priv->balloon.cb(cr, &priv->balloon.rect, priv->balloon.data);
268        }
269    
270        cairo_destroy(cr);
271    }
272    
273    #if 0
274    /* the user clicked into the balloons main area. handle this */
275    static void
276    osm_gps_map_handle_balloon_click(OsmGpsMap *map, gint x, gint y)
277  {  {
278      return osd_classic;      OsmGpsMapPrivate *priv = map->priv;
279    
280        if (!priv->balloon.valid)
281            return;
282    
283        /* check if the close button was clicked */
284        if ((x > priv->balloon.rect.w - 2*CLOSE_BUTTON_RADIUS) &&
285            (x < priv->balloon.rect.w) &&
286            (y > 0) && (y < 2*CLOSE_BUTTON_RADIUS)) {
287    
288            priv->balloon.valid = FALSE;
289            osm_gps_map_map_redraw_idle(map);
290        }
291  }  }
292    
293  static void  /* return true if balloon is being displayed and if */
294  osm_gps_map_osd_free(gpointer priv_ptr)  /* the given coordinate is within this balloon */
295    static gboolean
296    osm_gps_map_in_balloon(OsmGpsMapPrivate *priv, gint x, gint y)
297  {  {
298      osd_priv_t *priv = (osd_priv_t *)priv_ptr;      return (priv->balloon.valid &&
299                (x > priv->balloon.rect.x) &&
300                (x < priv->balloon.rect.x + priv->balloon.rect.w) &&
301                (y > priv->balloon.rect.y) &&
302                (y < priv->balloon.rect.y + priv->balloon.rect.h));
303    }
304    
305    #if 0
306        /* don't drag if the user clicked within the balloon */
307        if (osm_gps_map_in_balloon(priv,
308                       event->x + EXTRA_BORDER,
309                       event->y + EXTRA_BORDER))
310        {
311            priv->drag_counter = -1;
312            return FALSE;
313        }
314    
315      g_free(priv);  #ifdef ENABLE_BALLOON
316        /* released inside the balloon? */
317        if (osm_gps_map_in_balloon(priv,
318                       event->x + EXTRA_BORDER,
319                       event->y + EXTRA_BORDER))
320        {
321            osm_gps_map_handle_balloon_click(OSM_GPS_MAP(widget),
322                 event->x - priv->balloon.rect.x + EXTRA_BORDER,
323                 event->y - priv->balloon.rect.y + EXTRA_BORDER);
324        }
325    #endif
326    
327    #endif
328    
329    void
330    osm_gps_map_draw_balloon (OsmGpsMap *map, float latitude, float longitude,
331                              OsmGpsMapBalloonCallback cb, gpointer data)
332    {
333        OsmGpsMapPrivate *priv;
334    
335        /* remove and previously installed balloon */
336        osm_gps_map_clear_balloon (map);
337    
338        g_return_if_fail (OSM_IS_GPS_MAP (map));
339        priv = map->priv;
340    
341        priv->balloon.lat = latitude;
342        priv->balloon.lon = longitude;
343        priv->balloon.valid = TRUE;
344    
345        priv->balloon.cb = cb;
346        priv->balloon.data = data;
347    
348        // this redraws the map
349        osm_gps_map_map_redraw_idle(map);
350    }
351    
352    void
353    osm_gps_map_clear_balloon (OsmGpsMap *map)
354    {
355        OsmGpsMapPrivate *priv;
356    
357        g_return_if_fail (OSM_IS_GPS_MAP (map));
358        priv = map->priv;
359    
360        priv->balloon.valid = FALSE;
361    
362        osm_gps_map_map_redraw_idle(map);
363    }
364    #endif
365    
366    void osm_gps_map_osd_clear_balloon (OsmGpsMap *map) {
367        printf("request to clear balloon\n");
368    }
369    
370    void
371    osm_gps_map_osd_draw_balloon (OsmGpsMap *map, float latitude, float longitude,
372                                  OsmGpsMapBalloonCallback cb, gpointer data)
373    {
374        printf("request to draw balloon at %f %f\n", latitude, longitude);
375  }  }
376    
377    #endif // OSD_BALLOON
378    
379  /* position and extent of bounding box */  /* position and extent of bounding box */
380    #ifndef OSD_X
381  #define OSD_X      (10)  #define OSD_X      (10)
382  #define OSD_Y      (10)  #endif
383    
384  #define OSD_COLOR            0.5, 0.5, 1  #ifndef OSD_Y
385  #define OSD_COLOR_DISABLED   0.8, 0.8, 0.8  #define OSD_Y      (10)
386    #endif
387    
388  /* parameters of the direction shape */  /* parameters of the direction shape */
389  #ifndef OSM_GPS_MAP_OSD_DIAMETER  #ifndef OSD_DIAMETER
390  #define D_RAD  (30)         // diameter of dpad  #define D_RAD  (30)         // diameter of dpad
391  #else  #else
392  #define D_RAD  (OSM_GPS_MAP_OSD_DIAMETER)  #define D_RAD  (OSD_DIAMETER)
393  #endif  #endif
394  #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
395  #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 399  osm_gps_map_osd_free(gpointer priv_ptr)
399  #define Z_STEP   (D_RAD/4)  // distance between dpad and zoom  #define Z_STEP   (D_RAD/4)  // distance between dpad and zoom
400  #define Z_RAD    (D_RAD/2)  // radius of "caps" of zoom bar  #define Z_RAD    (D_RAD/2)  // radius of "caps" of zoom bar
401    
402    #ifdef OSD_SHADOW_ENABLE
403  /* shadow also depends on control size */  /* shadow also depends on control size */
404  #define OSD_SHADOW (D_RAD/6)  #define OSD_SHADOW (D_RAD/6)
405    #else
406    #define OSD_SHADOW (0)
407    #endif
408    
409    /* normally the GPS button is in the center of the dpad. if there's */
410    /* no dpad it will go into the zoom area */
411    #if defined(OSD_GPS_BUTTON) && defined(OSD_NO_DPAD)
412    #define Z_GPS  1
413    #else
414    #define Z_GPS  0
415    #endif
416    
417  /* total width and height of controls incl. shadow */  /* total width and height of controls incl. shadow */
418  #define OSD_W    (2*D_RAD + OSD_SHADOW)  #define OSD_W    (2*D_RAD + OSD_SHADOW + Z_GPS * 2 * Z_RAD)
419    #if !Z_GPS
420  #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)
421    #else
422    #define OSD_H    (2*Z_RAD + OSD_SHADOW)
423    #endif
424    
425    #ifdef OSD_SHADOW_ENABLE
426  #define OSD_LBL_SHADOW (OSD_SHADOW/2)  #define OSD_LBL_SHADOW (OSD_SHADOW/2)
427    #endif
428    
429    #define Z_TOP    ((1-Z_GPS) * (2 * D_RAD + Z_STEP))
430    
 #define Z_TOP    (2 * D_RAD + Z_STEP)  
431  #define Z_MID    (Z_TOP + Z_RAD)  #define Z_MID    (Z_TOP + Z_RAD)
432  #define Z_BOT    (Z_MID + Z_RAD)  #define Z_BOT    (Z_MID + Z_RAD)
433  #define Z_LEFT   (Z_RAD)  #define Z_LEFT   (Z_RAD)
434  #define Z_RIGHT  (2 * D_RAD - Z_RAD)  #define Z_RIGHT  (2 * D_RAD - Z_RAD + Z_GPS * 2 * Z_RAD)
435    #define Z_CENTER ((Z_RIGHT + Z_LEFT)/2)
436    
437  /* create the cairo shape used for the zoom buttons */  /* create the cairo shape used for the zoom buttons */
438  static void  static void
439  osm_gps_map_osd_zoom_shape(cairo_t *cr, gint x, gint y)  osd_zoom_shape(cairo_t *cr, gint x, gint y)
440  {  {
441      cairo_move_to (cr, x+Z_LEFT,    y+Z_TOP);      cairo_move_to (cr, x+Z_LEFT,    y+Z_TOP);
442      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 445  osm_gps_map_osd_zoom_shape(cairo_t *cr,
445      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);
446  }  }
447    
448    /* ------------------- color/shadow functions ----------------- */
449    
450    #ifndef OSD_COLOR
451    /* if no color has been specified we just use the gdks default colors */
452    static void
453    osd_labels(cairo_t *cr, gint width, gboolean enabled,
454                           GdkColor *fg, GdkColor *disabled) {
455        if(enabled)  gdk_cairo_set_source_color(cr, fg);
456        else         gdk_cairo_set_source_color(cr, disabled);
457        cairo_set_line_width (cr, width);
458    }
459    #else
460    static void
461    osd_labels(cairo_t *cr, gint width, gboolean enabled) {
462        if(enabled)  cairo_set_source_rgb (cr, OSD_COLOR);
463        else         cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);
464        cairo_set_line_width (cr, width);
465    }
466    #endif
467    
468    #ifdef OSD_SHADOW_ENABLE
469    static void
470    osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {
471        cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);
472        cairo_set_line_width (cr, width);
473    }
474    #endif
475    
476    #ifndef OSD_NO_DPAD
477  /* create the cairo shape used for the dpad */  /* create the cairo shape used for the dpad */
478  static void  static void
479  osm_gps_map_osd_dpad_shape(cairo_t *cr, gint x, gint y)  osd_dpad_shape(cairo_t *cr, gint x, gint y)
480  {  {
481      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);
482  }  }
483    #endif
484    
485    #ifdef OSD_SHADOW_ENABLE
486    static void
487    osd_shape_shadow(cairo_t *cr) {
488        cairo_set_source_rgba (cr, 0, 0, 0, 0.2);
489        cairo_fill (cr);
490        cairo_stroke (cr);
491    }
492    #endif
493    
494    #ifndef OSD_COLOR
495    /* if no color has been specified we just use the gdks default colors */
496    static void
497    osd_shape(cairo_t *cr, GdkColor *bg, GdkColor *fg) {
498        gdk_cairo_set_source_color(cr, bg);
499        cairo_fill_preserve (cr);
500        gdk_cairo_set_source_color(cr, fg);
501        cairo_set_line_width (cr, 1);
502        cairo_stroke (cr);
503    }
504    #else
505    static void
506    osd_shape(cairo_t *cr) {
507        cairo_set_source_rgb (cr, OSD_COLOR_BG);
508        cairo_fill_preserve (cr);
509        cairo_set_source_rgb (cr, OSD_COLOR);
510        cairo_set_line_width (cr, 1);
511        cairo_stroke (cr);
512    }
513    #endif
514    
515    
516  static gboolean  static gboolean
517  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 519  osm_gps_map_in_circle(gint x, gint y, gi
519      return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);      return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);
520  }  }
521    
522    #ifndef OSD_NO_DPAD
523  /* check whether x/y is within the dpad */  /* check whether x/y is within the dpad */
524  static osd_button_t  static osd_button_t
525  osm_gps_map_osd_check_dpad(gint x, gint y)  osd_check_dpad(gint x, gint y)
526  {  {
527      /* within entire dpad circle */      /* within entire dpad circle */
528      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))
529      {      {
530          /* convert into position relative to dpads centre */          /* convert into position relative to dpads centre */
531          x -= (OSD_X + D_RAD);          x -= D_RAD;
532          y -= (OSD_Y + D_RAD);          y -= D_RAD;
533    
534    #ifdef OSD_GPS_BUTTON
535          /* check for dpad center goes here! */          /* check for dpad center goes here! */
536          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))
537              return OSD_GPS;              return OSD_GPS;
538    #endif
539    
540          if( y < 0 && abs(x) < abs(y))          if( y < 0 && abs(x) < abs(y))
541              return OSD_UP;              return OSD_UP;
# Line 173  osm_gps_map_osd_check_dpad(gint x, gint Line 553  osm_gps_map_osd_check_dpad(gint x, gint
553      }      }
554      return OSD_NONE;      return OSD_NONE;
555  }  }
556    #endif
557    
558  /* check whether x/y is within the zoom pads */  /* check whether x/y is within the zoom pads */
559  static osd_button_t  static osd_button_t
560  osm_gps_map_osd_check_zoom(gint x, gint y) {  osd_check_zoom(gint x, gint y) {
561      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) {
562    
563          /* within circle around (-) label */          /* within circle around (-) label */
564          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)  
565              return OSD_OUT;              return OSD_OUT;
566    
567          /* within circle around (+) label */          /* within circle around (+) label */
568          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))
569              return OSD_IN;              return OSD_IN;
570    
571    #if Z_GPS == 1
572            /* within square around center */
573            if( x > Z_CENTER - Z_RAD && x < Z_CENTER + Z_RAD)
574                return OSD_GPS;
575    #endif
576    
577            /* between center of (-) button and center of entire zoom control area */
578            if(x > OSD_LEFT && x < D_RAD)
579                return OSD_OUT;
580    
581          /* between center of (+) button and center of entire zoom control area */          /* between center of (+) button and center of entire zoom control area */
582          if(x < OSD_RIGHT && x > OSD_X + D_RAD)          if(x < OSD_RIGHT && x > D_RAD)
583              return OSD_IN;              return OSD_IN;
584      }      }
585    
586      return OSD_NONE;      return OSD_NONE;
587  }  }
588    
589    #ifdef OSD_SOURCE_SEL
590    
591    /* place source selection at right border */
592    #define OSD_S_RAD (Z_RAD)
593    #define OSD_S_X   (-OSD_X)
594    #define OSD_S_Y   (OSD_Y)
595    #define OSD_S_PW  (2 * Z_RAD)
596    #define OSD_S_W   (OSD_S_PW)
597    #define OSD_S_PH  (2 * Z_RAD)
598    #define OSD_S_H   (OSD_S_PH + OSD_SHADOW)
599    
600    /* size of usable area when expanded */
601    #define OSD_S_AREA_W (priv->source_sel.width)
602    #define OSD_S_AREA_H (priv->source_sel.height)
603    #define OSD_S_EXP_W  (OSD_S_PW + OSD_S_AREA_W + OSD_SHADOW)
604    #define OSD_S_EXP_H  (OSD_S_AREA_H + OSD_SHADOW)
605    
606    /* internal value to draw the arrow on the "puller" */
607    #define OSD_S_D0  (OSD_S_RAD/2)
608    #ifndef OSD_FONT_SIZE
609    #define OSD_FONT_SIZE 16.0
610    #endif
611    #define OSD_TEXT_BORDER   (OSD_FONT_SIZE/2)
612    #define OSD_TEXT_SKIP     (OSD_FONT_SIZE/8)
613    
614    /* draw the shape of the source selection OSD, either only the puller (not expanded) */
615    /* or the entire menu incl. the puller (expanded) */
616    static void
617    osd_source_shape(osd_priv_t *priv, cairo_t *cr, gint x, gint y) {
618        if(!priv->source_sel.expanded) {
619            /* just draw the puller */
620            cairo_move_to (cr, x + OSD_S_PW, y + OSD_S_PH);
621            cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
622            cairo_line_to (cr, x + OSD_S_PW, y);
623        } else {
624            /* draw the puller and the area itself */
625            cairo_move_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y + OSD_S_AREA_H);
626            cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H);
627            if(OSD_S_Y > 0) {
628                cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_PH);
629                cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
630            } else {
631                cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_AREA_H-OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
632                cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H - OSD_S_PH);
633                cairo_line_to (cr, x + OSD_S_PW, y);
634            }
635            cairo_line_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y);
636            cairo_close_path (cr);
637        }
638    }
639    
640    static void
641    osd_source_content(osm_gps_map_osd_t *osd, cairo_t *cr, gint offset) {
642        osd_priv_t *priv = (osd_priv_t*)osd->priv;
643    
644        int py = offset + OSD_S_RAD - OSD_S_D0;
645    
646        if(!priv->source_sel.expanded) {
647            /* draw the "puller" open (<) arrow */
648            cairo_move_to (cr, offset + OSD_S_RAD + OSD_S_D0/2, py);
649            cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
650            cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
651        } else {
652            if(OSD_S_Y < 0)
653                py += OSD_S_AREA_H - OSD_S_PH;
654    
655            /* draw the "puller" close (>) arrow */
656            cairo_move_to (cr, offset + OSD_S_RAD - OSD_S_D0/2, py);
657            cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
658            cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
659            cairo_stroke(cr);
660    
661            /* don't draw a shadow for the text content */
662            if(offset == 1) {
663                gint source;
664                g_object_get(osd->widget, "map-source", &source, NULL);
665    
666                cairo_select_font_face (cr, "Sans",
667                                        CAIRO_FONT_SLANT_NORMAL,
668                                        CAIRO_FONT_WEIGHT_BOLD);
669                cairo_set_font_size (cr, OSD_FONT_SIZE);
670    
671                int i, step = (priv->source_sel.height - 2*OSD_TEXT_BORDER) /
672                    OSM_GPS_MAP_SOURCE_LAST;
673                for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
674                    cairo_text_extents_t extents;
675                    const char *src = osm_gps_map_source_get_friendly_name(i);
676                    cairo_text_extents (cr, src, &extents);
677    
678                    int x = offset + OSD_S_PW + OSD_TEXT_BORDER;
679                    int y = offset + step * (i-1) + OSD_TEXT_BORDER;
680    
681                    /* draw filled rectangle if selected */
682                    if(source == i) {
683                        cairo_rectangle(cr, x - OSD_TEXT_BORDER/2,
684                                        y - OSD_TEXT_SKIP,
685                                        priv->source_sel.width - OSD_TEXT_BORDER,
686                                        step + OSD_TEXT_SKIP);
687                        cairo_fill(cr);
688    
689                        /* temprarily draw with background color */
690    #ifndef OSD_COLOR
691                        GdkColor bg = osd->widget->style->bg[GTK_STATE_NORMAL];
692                        gdk_cairo_set_source_color(cr, &bg);
693    #else
694                        cairo_set_source_rgb (cr, OSD_COLOR_BG);
695    #endif
696                    }
697    
698                    cairo_move_to (cr, x, y + OSD_TEXT_SKIP - extents.y_bearing);
699                    cairo_show_text (cr, src);
700    
701                    /* restore color */
702                    if(source == i) {
703    #ifndef OSD_COLOR
704                        GdkColor fg = osd->widget->style->fg[GTK_STATE_NORMAL];
705                        gdk_cairo_set_source_color(cr, &fg);
706    #else
707                        cairo_set_source_rgb (cr, OSD_COLOR);
708    #endif
709                    }
710                }
711            }
712        }
713    }
714    
715    static void
716    osd_render_source_sel(osm_gps_map_osd_t *osd, gboolean force_rerender) {
717        osd_priv_t *priv = (osd_priv_t*)osd->priv;
718    
719        if(priv->source_sel.rendered && !force_rerender)
720            return;
721    
722        priv->source_sel.rendered = TRUE;
723    
724    #ifndef OSD_COLOR
725        GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
726        GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
727        GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
728    #endif
729    
730        /* draw source selector */
731        cairo_t *cr = cairo_create(priv->source_sel.surface);
732        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
733        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
734        cairo_paint(cr);
735        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
736    
737    #ifdef OSD_SHADOW_ENABLE
738        osd_source_shape(priv, cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
739        osd_shape_shadow(cr);
740    #endif
741    
742        osd_source_shape(priv, cr, 1, 1);
743    #ifndef OSD_COLOR
744        osd_shape(cr, &bg, &fg);
745    #else
746        osd_shape(cr);
747    #endif
748    
749    #ifdef OSD_SHADOW_ENABLE
750        osd_labels_shadow(cr, Z_RAD/3, TRUE);
751        osd_source_content(osd, cr, 1+OSD_LBL_SHADOW);
752        cairo_stroke (cr);
753    #endif
754    #ifndef OSD_COLOR
755        osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
756    #else
757        osd_labels(cr, Z_RAD/3, TRUE);
758    #endif
759        osd_source_content(osd, cr, 1);
760        cairo_stroke (cr);
761    
762        cairo_destroy(cr);
763    }
764    
765    /* re-allocate the buffer used to draw the menu. This is used */
766    /* to collapse/expand the buffer */
767    static void
768    osd_source_reallocate(osm_gps_map_osd_t *osd) {
769        osd_priv_t *priv = (osd_priv_t*)osd->priv;
770    
771        /* re-allocate offscreen bitmap */
772        g_assert (priv->source_sel.surface);
773    
774        int w = OSD_S_W, h = OSD_S_H;
775        if(priv->source_sel.expanded) {
776            cairo_text_extents_t extents;
777    
778            /* determine content size */
779            cairo_t *cr = cairo_create(priv->source_sel.surface);
780            cairo_select_font_face (cr, "Sans",
781                                    CAIRO_FONT_SLANT_NORMAL,
782                                    CAIRO_FONT_WEIGHT_BOLD);
783            cairo_set_font_size (cr, OSD_FONT_SIZE);
784    
785            /* calculate menu size */
786            int i, max_h = 0, max_w = 0;
787            for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
788                const char *src = osm_gps_map_source_get_friendly_name(i);
789                cairo_text_extents (cr, src, &extents);
790    
791                if(extents.width > max_w) max_w = extents.width;
792                if(extents.height > max_h) max_h = extents.height;
793            }
794            cairo_destroy(cr);
795    
796            priv->source_sel.width  = max_w + 2*OSD_TEXT_BORDER;
797            priv->source_sel.height = OSM_GPS_MAP_SOURCE_LAST *
798                (max_h + 2*OSD_TEXT_SKIP) + 2*OSD_TEXT_BORDER;
799    
800            w = OSD_S_EXP_W;
801            h = OSD_S_EXP_H;
802        }
803    
804        cairo_surface_destroy(priv->source_sel.surface);
805        priv->source_sel.surface =
806            cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w+2, h+2);
807    
808        osd_render_source_sel(osd, TRUE);
809    }
810    
811    #define OSD_HZ      15
812    #define OSD_TIME    500
813    
814    static gboolean osd_source_animate(gpointer data) {
815        osm_gps_map_osd_t *osd = (osm_gps_map_osd_t*)data;
816        osd_priv_t *priv = (osd_priv_t*)osd->priv;
817        int diff = OSD_S_EXP_W - OSD_S_W - OSD_S_X;
818        gboolean done = FALSE;
819        priv->source_sel.count += priv->source_sel.dir;
820    
821        /* shifting in */
822        if(priv->source_sel.dir < 0) {
823            if(priv->source_sel.count <= 0) {
824                priv->source_sel.count = 0;
825                done = TRUE;
826            }
827        } else {
828            if(priv->source_sel.count >= 1000) {
829                priv->source_sel.expanded = FALSE;
830                osd_source_reallocate(osd);
831    
832                priv->source_sel.count = 1000;
833                done = TRUE;
834            }
835        }
836    
837    
838        /* count runs linearly from 0 to 1000, map this nicely onto a position */
839    
840        /* nice sinoid mapping */
841        float m = 0.5-cos(priv->source_sel.count * M_PI / 1000.0)/2;
842        priv->source_sel.shift =
843            (osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X) +
844            m * diff;
845    
846        /* make sure the screen is updated */
847        osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
848    
849        /* stop animation if done */
850        if(done)
851            priv->source_sel.handler_id = 0;
852    
853        return !done;
854    }
855    
856    /* switch between expand and collapse mode of source selection */
857    static void
858    osd_source_toggle(osm_gps_map_osd_t *osd)
859    {
860        osd_priv_t *priv = (osd_priv_t*)osd->priv;
861    
862        /* ignore clicks while animation is running */
863        if(priv->source_sel.handler_id)
864            return;
865    
866        /* expand immediately, collapse is handle at the end of the */
867        /* collapse animation */
868        if(!priv->source_sel.expanded) {
869            priv->source_sel.expanded = TRUE;
870            osd_source_reallocate(osd);
871    
872            priv->source_sel.count = 1000;
873            priv->source_sel.shift = osd->widget->allocation.width - OSD_S_W;
874            priv->source_sel.dir = -1000/OSD_HZ;
875        } else {
876            priv->source_sel.count =  0;
877            priv->source_sel.shift = osd->widget->allocation.width -
878                OSD_S_EXP_W + OSD_S_X;
879            priv->source_sel.dir = +1000/OSD_HZ;
880        }
881    
882        /* start timer to handle animation */
883        priv->source_sel.handler_id = gtk_timeout_add(OSD_TIME/OSD_HZ,
884                                                      osd_source_animate, osd);
885    }
886    
887    /* check if the user clicked inside the source selection area */
888    static osd_button_t
889    osd_source_check(osm_gps_map_osd_t *osd, gint x, gint y) {
890        osd_priv_t *priv = (osd_priv_t*)osd->priv;
891    
892        if(!priv->source_sel.expanded)
893            x -= osd->widget->allocation.width - OSD_S_W;
894        else
895            x -= osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
896    
897        if(OSD_S_Y > 0)
898            y -= OSD_S_Y;
899        else
900            y -= osd->widget->allocation.height - OSD_S_PH + OSD_S_Y;
901    
902        /* within square around puller? */
903        if(y > 0 && y < OSD_S_PH && x > 0 && x < OSD_S_PW) {
904            /* really within puller shape? */
905            if(x > Z_RAD || osm_gps_map_in_circle(x, y, Z_RAD, Z_RAD, Z_RAD)) {
906                /* expand source selector */
907                osd_source_toggle(osd);
908    
909                /* tell upper layers that user clicked some background element */
910                /* of the OSD */
911                return OSD_BG;
912            }
913        }
914    
915        /* check for clicks into data area */
916        if(priv->source_sel.expanded && !priv->source_sel.handler_id) {
917            /* re-adjust from puller top to content top */
918            if(OSD_S_Y < 0)
919                y += OSD_S_EXP_H - OSD_S_PH;
920    
921            if(x > OSD_S_PW &&
922               x < OSD_S_PW + OSD_S_EXP_W &&
923               y > 0 &&
924               y < OSD_S_EXP_H) {
925    
926                int step = (priv->source_sel.height - 2*OSD_TEXT_BORDER)
927                    / OSM_GPS_MAP_SOURCE_LAST;
928    
929                y -= OSD_TEXT_BORDER - OSD_TEXT_SKIP;
930                y /= step;
931                y += 1;
932    
933                gint old = 0;
934                g_object_get(osd->widget, "map-source", &old, NULL);
935    
936                if(y > OSM_GPS_MAP_SOURCE_NULL &&
937                   y <= OSM_GPS_MAP_SOURCE_LAST &&
938                   old != y) {
939                    g_object_set(osd->widget, "map-source", y, NULL);
940    
941                    osd_render_source_sel(osd, TRUE);
942                    osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
943                }
944    
945                /* return "clicked in OSD background" to prevent further */
946                /* processing by application */
947                return OSD_BG;
948            }
949        }
950    
951        return OSD_NONE;
952    }
953    #endif // OSD_SOURCE_SEL
954    
955  static osd_button_t  static osd_button_t
956  osm_gps_map_osd_check(gint x, gint y) {  osd_check(osm_gps_map_osd_t *osd, gint x, gint y) {
957      osd_button_t but = OSD_NONE;      osd_button_t but = OSD_NONE;
958    
959    #ifdef OSD_SOURCE_SEL
960        /* the source selection area is handles internally */
961        but = osd_source_check(osd, x, y);
962        if(but != OSD_NONE)
963            return but;
964    #endif
965    
966        x -= OSD_X;
967        y -= OSD_Y;
968    
969        if(OSD_X < 0)
970            x -= (osd->widget->allocation.width - OSD_W);
971    
972        if(OSD_Y < 0)
973            y -= (osd->widget->allocation.height - OSD_H);
974    
975      /* first do a rough test for the OSD area. */      /* first do a rough test for the OSD area. */
976      /* this is just to avoid an unnecessary detailed test */      /* this is just to avoid an unnecessary detailed test */
977      if(x > OSD_X && x < OSD_X + OSD_W &&      if(x > 0 && x < OSD_W && y > 0 && y < OSD_H) {
978         y > OSD_Y && y < OSD_Y + OSD_H) {  #ifndef OSD_NO_DPAD
979          but = osm_gps_map_osd_check_dpad(x, y);          but = osd_check_dpad(x, y);
980    #endif
981    
982          if(but == OSD_NONE)          if(but == OSD_NONE)
983              but = osm_gps_map_osd_check_zoom(x, y);              but = osd_check_zoom(x, y);
984      }      }
985    
986      return but;      return but;
987  }  }
988    
989  static void  #ifndef OSD_NO_DPAD
 osm_gps_map_osd_shape_shadow(cairo_t *cr) {  
     cairo_set_source_rgba (cr, 0, 0, 0, 0.2);  
     cairo_fill (cr);  
     cairo_stroke (cr);  
 }  
   
 static void  
 osm_gps_map_osd_shape(cairo_t *cr) {  
     cairo_set_source_rgb (cr, 1, 1, 1);  
     cairo_fill_preserve (cr);  
     cairo_set_source_rgb (cr, OSD_COLOR);  
     cairo_set_line_width (cr, 1);  
     cairo_stroke (cr);  
 }  
   
990  static void  static void
991  osm_gps_map_osd_dpad_labels(cairo_t *cr, gint x, gint y) {  osd_dpad_labels(cairo_t *cr, gint x, gint y) {
992      /* move reference to dpad center */      /* move reference to dpad center */
993      x += D_RAD;      x += D_RAD;
994      y += D_RAD;      y += D_RAD;
# Line 256  osm_gps_map_osd_dpad_labels(cairo_t *cr, Line 1011  osm_gps_map_osd_dpad_labels(cairo_t *cr,
1011          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]);
1012      }      }
1013  }  }
1014    #endif
1015    
1016  /* draw the sattelite dish icon in the center of the dpad */  #ifdef OSD_GPS_BUTTON
1017  #define GPS_V0  (D_RAD/8)  /* draw the satellite dish icon in the center of the dpad */
1018    #define GPS_V0  (D_RAD/7)
1019  #define GPS_V1  (D_RAD/10)  #define GPS_V1  (D_RAD/10)
1020  #define GPS_V2  (D_RAD/5)  #define GPS_V2  (D_RAD/5)
1021    
1022  /* draw a satellite receiver dish */  /* draw a satellite receiver dish */
1023    /* this is either drawn in the center of the dpad (if present) */
1024    /* or in the middle of the zoom area */
1025  static void  static void
1026  osm_gps_map_osd_dpad_gps(cairo_t *cr, gint x, gint y) {  osd_dpad_gps(cairo_t *cr, gint x, gint y) {
1027      /* move reference to dpad center */      /* move reference to dpad center */
1028      x += D_RAD;      x += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD * 3;
1029      y += D_RAD + GPS_V0;      y += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD + GPS_V0;
1030    
1031      cairo_move_to (cr, x-GPS_V0, y+GPS_V0);      cairo_move_to (cr, x-GPS_V0, y+GPS_V0);
1032      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 1041  osm_gps_map_osd_dpad_gps(cairo_t *cr, gi
1041      cairo_move_to (cr, x, y-GPS_V2);      cairo_move_to (cr, x, y-GPS_V2);
1042      cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);      cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);
1043  }  }
1044    #endif
1045    
1046  #define Z_LEN  (2*Z_RAD/3)  #define Z_LEN  (2*Z_RAD/3)
1047    
1048  static void  static void
1049  osm_gps_map_osd_zoom_labels(cairo_t *cr, gint x, gint y) {  osd_zoom_labels(cairo_t *cr, gint x, gint y) {
1050      cairo_move_to (cr, x + Z_LEFT  - Z_LEN, y + Z_MID);      cairo_move_to (cr, x + Z_LEFT  - Z_LEN, y + Z_MID);
1051      cairo_line_to (cr, x + Z_LEFT  + Z_LEN, y + Z_MID);      cairo_line_to (cr, x + Z_LEFT  + Z_LEN, y + Z_MID);
1052    
# Line 296  osm_gps_map_osd_zoom_labels(cairo_t *cr, Line 1056  osm_gps_map_osd_zoom_labels(cairo_t *cr,
1056      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);
1057  }  }
1058    
1059    #ifdef OSD_COORDINATES
1060    
1061    #ifndef OSD_COORDINATES_FONT_SIZE
1062    #define OSD_COORDINATES_FONT_SIZE 12
1063    #endif
1064    
1065    #define OSD_COORDINATES_OFFSET (OSD_COORDINATES_FONT_SIZE/6)
1066    
1067    #define OSD_COORDINATES_W  (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET)
1068    #define OSD_COORDINATES_H  (2*OSD_COORDINATES_FONT_SIZE+OSD_COORDINATES_OFFSET)
1069    
1070    /* these can be overwritten with versions that support */
1071    /* localization */
1072    #ifndef OSD_COORDINATES_CHR_N
1073    #define OSD_COORDINATES_CHR_N  "N"
1074    #endif
1075    #ifndef OSD_COORDINATES_CHR_S
1076    #define OSD_COORDINATES_CHR_S  "S"
1077    #endif
1078    #ifndef OSD_COORDINATES_CHR_E
1079    #define OSD_COORDINATES_CHR_E  "E"
1080    #endif
1081    #ifndef OSD_COORDINATES_CHR_W
1082    #define OSD_COORDINATES_CHR_W  "W"
1083    #endif
1084    
1085    
1086    
1087    /* this is the classic geocaching notation */
1088    static char
1089    *osd_latitude_str(float latitude) {
1090        char *c = OSD_COORDINATES_CHR_N;
1091        float integral, fractional;
1092    
1093        if(isnan(latitude))
1094            return NULL;
1095    
1096        if(latitude < 0) {
1097            latitude = fabs(latitude);
1098            c = OSD_COORDINATES_CHR_S;
1099        }
1100    
1101        fractional = modff(latitude, &integral);
1102    
1103        return g_strdup_printf("%s %02d° %06.3f'",
1104                               c, (int)integral, fractional*60.0);
1105    }
1106    
1107    static char
1108    *osd_longitude_str(float longitude) {
1109        char *c = OSD_COORDINATES_CHR_E;
1110        float integral, fractional;
1111    
1112        if(isnan(longitude))
1113            return NULL;
1114    
1115        if(longitude < 0) {
1116            longitude = fabs(longitude);
1117            c = OSD_COORDINATES_CHR_W;
1118        }
1119    
1120        fractional = modff(longitude, &integral);
1121    
1122        return g_strdup_printf("%s %03d° %06.3f'",
1123                               c, (int)integral, fractional*60.0);
1124    }
1125    
1126  static void  static void
1127  osm_gps_map_osd_labels(cairo_t *cr, gint width, gboolean enabled) {  osd_render_coordinates(osm_gps_map_osd_t *osd)
1128      if(enabled)  cairo_set_source_rgb (cr, OSD_COLOR);  {
1129      else         cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);      osd_priv_t *priv = (osd_priv_t*)osd->priv;
1130      cairo_set_line_width (cr, width);  
1131        /* get current map position */
1132        gfloat lat, lon;
1133        g_object_get(osd->widget, "latitude", &lat, "longitude", &lon, NULL);
1134    
1135        /* check if position has changed enough to require redraw */
1136        if(!isnan(priv->coordinates.lat) && !isnan(priv->coordinates.lon))
1137            /* 1/60000 == 1/1000 minute */
1138            if((fabsf(lat - priv->coordinates.lat) < 1/60000) &&
1139               (fabsf(lon - priv->coordinates.lon) < 1/60000))
1140                return;
1141    
1142        priv->coordinates.lat = lat;
1143        priv->coordinates.lon = lon;
1144    
1145        /* first fill with transparency */
1146        cairo_t *cr = cairo_create(priv->coordinates.surface);
1147        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1148        //    cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 0.5);
1149        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
1150        cairo_paint(cr);
1151        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1152    
1153        cairo_select_font_face (cr, "Sans",
1154                                CAIRO_FONT_SLANT_NORMAL,
1155                                CAIRO_FONT_WEIGHT_BOLD);
1156        cairo_set_font_size (cr, OSD_COORDINATES_FONT_SIZE);
1157    
1158        char *latitude = osd_latitude_str(lat);
1159        char *longitude = osd_longitude_str(lon);
1160    
1161        cairo_text_extents_t lat_extents, lon_extents;
1162        cairo_text_extents (cr, latitude, &lat_extents);
1163        cairo_text_extents (cr, longitude, &lon_extents);
1164    
1165        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
1166        cairo_set_line_width (cr, OSD_COORDINATES_FONT_SIZE/6);
1167        cairo_move_to (cr,
1168                       (OSD_COORDINATES_W - lat_extents.width)/2,
1169                       OSD_COORDINATES_OFFSET - lat_extents.y_bearing);
1170        cairo_text_path (cr, latitude);
1171        cairo_move_to (cr,
1172                       (OSD_COORDINATES_W - lon_extents.width)/2,
1173                       OSD_COORDINATES_OFFSET - lon_extents.y_bearing +
1174                       OSD_COORDINATES_FONT_SIZE);
1175        cairo_text_path (cr, longitude);
1176      cairo_stroke (cr);      cairo_stroke (cr);
1177    
1178        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
1179        cairo_move_to (cr,
1180                       (OSD_COORDINATES_W - lat_extents.width)/2,
1181                       OSD_COORDINATES_OFFSET - lat_extents.y_bearing);
1182        cairo_show_text (cr, latitude);
1183        cairo_move_to (cr,
1184                       (OSD_COORDINATES_W - lon_extents.width)/2,
1185                       OSD_COORDINATES_OFFSET - lon_extents.y_bearing +
1186                       OSD_COORDINATES_FONT_SIZE);
1187        cairo_show_text (cr, longitude);
1188    
1189        g_free(latitude);
1190        g_free(longitude);
1191    
1192        cairo_destroy(cr);
1193  }  }
1194    #endif  // OSD_COORDINATES
1195    
1196    #ifdef OSD_CROSSHAIR
1197    
1198    #ifndef OSD_CROSSHAIR_RADIUS
1199    #define OSD_CROSSHAIR_RADIUS 10
1200    #endif
1201    
1202    #define OSD_CROSSHAIR_TICK  (OSD_CROSSHAIR_RADIUS/2)
1203    #define OSD_CROSSHAIR_BORDER (OSD_CROSSHAIR_TICK + OSD_CROSSHAIR_RADIUS/4)
1204    #define OSD_CROSSHAIR_W  ((OSD_CROSSHAIR_RADIUS+OSD_CROSSHAIR_BORDER)*2)
1205    #define OSD_CROSSHAIR_H  ((OSD_CROSSHAIR_RADIUS+OSD_CROSSHAIR_BORDER)*2)
1206    
1207    static void
1208    osd_render_crosshair_shape(cairo_t *cr) {
1209        cairo_arc (cr, OSD_CROSSHAIR_W/2, OSD_CROSSHAIR_H/2,
1210                   OSD_CROSSHAIR_RADIUS, 0,  2*M_PI);
1211    
1212        cairo_move_to (cr, OSD_CROSSHAIR_W/2 - OSD_CROSSHAIR_RADIUS,
1213                       OSD_CROSSHAIR_H/2);
1214        cairo_rel_line_to (cr, -OSD_CROSSHAIR_TICK, 0);
1215        cairo_move_to (cr, OSD_CROSSHAIR_W/2 + OSD_CROSSHAIR_RADIUS,
1216                       OSD_CROSSHAIR_H/2);
1217        cairo_rel_line_to (cr,  OSD_CROSSHAIR_TICK, 0);
1218    
1219        cairo_move_to (cr, OSD_CROSSHAIR_W/2,
1220                       OSD_CROSSHAIR_H/2 - OSD_CROSSHAIR_RADIUS);
1221        cairo_rel_line_to (cr, 0, -OSD_CROSSHAIR_TICK);
1222        cairo_move_to (cr, OSD_CROSSHAIR_W/2,
1223                       OSD_CROSSHAIR_H/2 + OSD_CROSSHAIR_RADIUS);
1224        cairo_rel_line_to (cr, 0, OSD_CROSSHAIR_TICK);
1225    
 static void  
 osm_gps_map_osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {  
     cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);  
     cairo_set_line_width (cr, width);  
1226      cairo_stroke (cr);      cairo_stroke (cr);
1227  }  }
1228    
1229  static void  static void
1230  osm_gps_map_osd_render(OsmGpsMapPrivate *priv) {  osd_render_crosshair(osm_gps_map_osd_t *osd)
1231    {
1232        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1233    
1234        if(priv->crosshair.rendered)
1235            return;
1236    
1237        priv->crosshair.rendered = TRUE;
1238    
1239        /* first fill with transparency */
1240        cairo_t *cr = cairo_create(priv->crosshair.surface);
1241        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1242        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
1243        cairo_paint(cr);
1244        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1245    
1246        cairo_set_line_cap  (cr, CAIRO_LINE_CAP_ROUND);
1247    
1248        cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.5);
1249        cairo_set_line_width (cr, OSD_CROSSHAIR_RADIUS/2);
1250        osd_render_crosshair_shape(cr);
1251    
1252        cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.5);
1253        cairo_set_line_width (cr, OSD_CROSSHAIR_RADIUS/4);
1254        osd_render_crosshair_shape(cr);
1255    
1256        cairo_destroy(cr);
1257    }
1258    #endif
1259    
1260    #ifdef OSD_SCALE
1261    
1262    #ifndef OSD_SCALE_FONT_SIZE
1263    #define OSD_SCALE_FONT_SIZE 12
1264    #endif
1265    #define OSD_SCALE_W   (10*OSD_SCALE_FONT_SIZE)
1266    #define OSD_SCALE_H   (5*OSD_SCALE_FONT_SIZE/2)
1267    
1268    /* various parameters used to create the scale */
1269    #define OSD_SCALE_H2   (OSD_SCALE_H/2)
1270    #define OSD_SCALE_TICK (2*OSD_SCALE_FONT_SIZE/3)
1271    #define OSD_SCALE_M    (OSD_SCALE_H2 - OSD_SCALE_TICK)
1272    #define OSD_SCALE_I    (OSD_SCALE_H2 + OSD_SCALE_TICK)
1273    #define OSD_SCALE_FD   (OSD_SCALE_FONT_SIZE/4)
1274    
1275    static void
1276    osd_render_scale(osm_gps_map_osd_t *osd)
1277    {
1278        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1279    
1280        /* this only needs to be rendered if the zoom has changed */
1281        gint zoom;
1282        g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);
1283        if(zoom == priv->scale.zoom)
1284            return;
1285    
1286        priv->scale.zoom = zoom;
1287    
1288        float m_per_pix = osm_gps_map_get_scale(OSM_GPS_MAP(osd->widget));
1289    
1290      /* first fill with transparency */      /* first fill with transparency */
1291      cairo_t *cr = cairo_create(priv->osd.overlay);      cairo_t *cr = cairo_create(priv->scale.surface);
1292      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1293      cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);      cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
1294        // pink for testing:    cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2);
1295      cairo_paint(cr);      cairo_paint(cr);
1296        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1297    
1298        /* determine the size of the scale width in meters */
1299        float width = (OSD_SCALE_W-OSD_SCALE_FONT_SIZE/6) * m_per_pix;
1300    
1301        /* scale this to useful values */
1302        int exp = logf(width)*M_LOG10E;
1303        int mant = width/pow(10,exp);
1304        int width_metric = mant * pow(10,exp);
1305        char *dist_str = NULL;
1306        if(width_metric<1000)
1307            dist_str = g_strdup_printf("%u m", width_metric);
1308        else
1309            dist_str = g_strdup_printf("%u km", width_metric/1000);
1310        width_metric /= m_per_pix;
1311    
1312        /* and now the hard part: scale for useful imperial values :-( */
1313        /* try to convert to feet, 1ft == 0.3048 m */
1314        width /= 0.3048;
1315        float imp_scale = 0.3048;
1316        char *dist_imp_unit = "ft";
1317    
1318        if(width >= 100) {
1319            /* 1yd == 3 feet */
1320            width /= 3.0;
1321            imp_scale *= 3.0;
1322            dist_imp_unit = "yd";
1323    
1324            if(width >= 1760.0) {
1325                /* 1mi == 1760 yd */
1326                width /= 1760.0;
1327                imp_scale *= 1760.0;
1328                dist_imp_unit = "mi";
1329            }
1330        }
1331    
1332        /* also convert this to full tens/hundreds */
1333        exp = logf(width)*M_LOG10E;
1334        mant = width/pow(10,exp);
1335        int width_imp = mant * pow(10,exp);
1336        char *dist_str_imp = g_strdup_printf("%u %s", width_imp, dist_imp_unit);
1337    
1338        /* convert back to pixels */
1339        width_imp *= imp_scale;
1340        width_imp /= m_per_pix;
1341    
1342        cairo_select_font_face (cr, "Sans",
1343                                CAIRO_FONT_SLANT_NORMAL,
1344                                CAIRO_FONT_WEIGHT_BOLD);
1345        cairo_set_font_size (cr, OSD_SCALE_FONT_SIZE);
1346        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
1347    
1348        cairo_text_extents_t extents;
1349        cairo_text_extents (cr, dist_str, &extents);
1350    
1351        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
1352        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6);
1353        cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD);
1354        cairo_text_path (cr, dist_str);
1355        cairo_stroke (cr);
1356        cairo_move_to (cr, 2*OSD_SCALE_FD,
1357                       OSD_SCALE_H2+OSD_SCALE_FD + extents.height);
1358        cairo_text_path (cr, dist_str_imp);
1359        cairo_stroke (cr);
1360    
1361        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
1362        cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD);
1363        cairo_show_text (cr, dist_str);
1364        cairo_move_to (cr, 2*OSD_SCALE_FD,
1365                       OSD_SCALE_H2+OSD_SCALE_FD + extents.height);
1366        cairo_show_text (cr, dist_str_imp);
1367    
1368        g_free(dist_str);
1369        g_free(dist_str_imp);
1370    
1371        /* draw white line */
1372        cairo_set_line_cap  (cr, CAIRO_LINE_CAP_ROUND);
1373        cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);
1374        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/3);
1375        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M);
1376        cairo_rel_line_to (cr, 0,  OSD_SCALE_TICK);
1377        cairo_rel_line_to (cr, width_metric, 0);
1378        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1379        cairo_stroke(cr);
1380        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I);
1381        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1382        cairo_rel_line_to (cr, width_imp, 0);
1383        cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK);
1384        cairo_stroke(cr);
1385    
1386        /* draw black line */
1387        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
1388        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6);
1389        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M);
1390        cairo_rel_line_to (cr, 0,  OSD_SCALE_TICK);
1391        cairo_rel_line_to (cr, width_metric, 0);
1392        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1393        cairo_stroke(cr);
1394        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I);
1395        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1396        cairo_rel_line_to (cr, width_imp, 0);
1397        cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK);
1398        cairo_stroke(cr);
1399    
1400        cairo_destroy(cr);
1401    }
1402    #endif
1403    
1404    static void
1405    osd_render_controls(osm_gps_map_osd_t *osd)
1406    {
1407        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1408    
1409        if(priv->controls.rendered
1410    #ifdef OSD_GPS_BUTTON
1411           && (priv->controls.gps_enabled == (osd->cb != NULL))
1412    #endif
1413           )
1414            return;
1415    
1416    #ifdef OSD_GPS_BUTTON
1417        priv->controls.gps_enabled = (osd->cb != NULL);
1418    #endif
1419        priv->controls.rendered = TRUE;
1420    
1421    #ifndef OSD_COLOR
1422        GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
1423        GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
1424        GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
1425    #endif
1426    
1427        /* first fill with transparency */
1428        cairo_t *cr = cairo_create(priv->controls.surface);
1429        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1430        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
1431        cairo_paint(cr);
1432      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1433    
1434      /* --------- draw zoom and dpad shape shadow ----------- */      /* --------- draw zoom and dpad shape shadow ----------- */
1435      gint x = 0, y = 0;  #ifdef OSD_SHADOW_ENABLE
1436        osd_zoom_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
1437      osm_gps_map_osd_zoom_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);      osd_shape_shadow(cr);
1438      osm_gps_map_osd_shape_shadow(cr);  #ifndef OSD_NO_DPAD
1439      osm_gps_map_osd_dpad_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);      osd_dpad_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
1440      osm_gps_map_osd_shape_shadow(cr);      osd_shape_shadow(cr);
1441    #endif
1442    #endif
1443    
1444      /* --------- draw zoom and dpad shape ----------- */      /* --------- draw zoom and dpad shape ----------- */
1445    
1446      osm_gps_map_osd_zoom_shape(cr, x, y);      osd_zoom_shape(cr, 1, 1);
1447      osm_gps_map_osd_shape(cr);  #ifndef OSD_COLOR
1448      osm_gps_map_osd_dpad_shape(cr, x, y);      osd_shape(cr, &bg, &fg);
1449      osm_gps_map_osd_shape(cr);  #else
1450        osd_shape(cr);
1451    #endif
1452    #ifndef OSD_NO_DPAD
1453        osd_dpad_shape(cr, 1, 1);
1454    #ifndef OSD_COLOR
1455        osd_shape(cr, &bg, &fg);
1456    #else
1457        osd_shape(cr);
1458    #endif
1459    #endif
1460    
1461      /* --------- draw zoom and dpad labels --------- */      /* --------- draw zoom and dpad labels --------- */
1462    
1463      osm_gps_map_osd_zoom_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);  #ifdef OSD_SHADOW_ENABLE
1464      osm_gps_map_osd_dpad_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);      osd_labels_shadow(cr, Z_RAD/3, TRUE);
1465      osm_gps_map_osd_labels_shadow(cr, Z_RAD/3, TRUE);      osd_zoom_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
1466      osm_gps_map_osd_dpad_gps(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);  #ifndef OSD_NO_DPAD
1467      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);
1468    #endif
1469      osm_gps_map_osd_zoom_labels(cr, x, y);      cairo_stroke(cr);
1470      osm_gps_map_osd_dpad_labels(cr, x, y);  #ifdef OSD_GPS_BUTTON
1471      osm_gps_map_osd_labels(cr, Z_RAD/3, TRUE);      osd_labels_shadow(cr, Z_RAD/6, osd->cb != NULL);
1472      osm_gps_map_osd_dpad_gps(cr, x, y);      osd_dpad_gps(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
1473      osm_gps_map_osd_labels(cr, Z_RAD/6, priv->osd.cb != NULL);      cairo_stroke(cr);
1474    #endif
1475    #endif
1476    
1477    #ifndef OSD_COLOR
1478        osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
1479    #else
1480        osd_labels(cr, Z_RAD/3, TRUE);
1481    #endif
1482        osd_zoom_labels(cr, 1, 1);
1483    #ifndef OSD_NO_DPAD
1484        osd_dpad_labels(cr, 1, 1);
1485    #endif
1486        cairo_stroke(cr);
1487    
1488    #ifndef OSD_COLOR
1489        osd_labels(cr, Z_RAD/6, osd->cb != NULL, &fg, &da);
1490    #else
1491        osd_labels(cr, Z_RAD/6, osd->cb != NULL);
1492    #endif
1493    #ifdef OSD_GPS_BUTTON
1494        osd_dpad_gps(cr, 1, 1);
1495    #endif
1496        cairo_stroke(cr);
1497    
1498      cairo_destroy(cr);      cairo_destroy(cr);
1499  }  }
1500    
1501  static void  static void
1502  osm_gps_map_osd_draw_controls (OsmGpsMap *map, gint xoffset, gint yoffset)  osd_render(osm_gps_map_osd_t *osd)
1503  {  {
1504      OsmGpsMapPrivate *priv = map->priv;      /* this function is actually called pretty often since the */
1505        /* OSD contents may have changed (due to a coordinate/zoom change). */
1506        /* The different OSD parts have to make sure that they don't */
1507        /* render unneccessarily often and thus waste CPU power */
1508    
1509        osd_render_controls(osd);
1510    
1511    #ifdef OSD_SOURCE_SEL
1512        osd_render_source_sel(osd, FALSE);
1513    #endif
1514    
1515      /* backup previous contents */  #ifdef OSD_SCALE
1516      if(!priv->osd.backup)      osd_render_scale(osd);
1517          priv->osd.backup = gdk_pixmap_new(priv->pixmap, OSD_W+2, OSD_H+2, -1);  #endif
   
     gint x = OSD_X + EXTRA_BORDER + xoffset;  
     gint y = OSD_Y + EXTRA_BORDER + yoffset;  
   
     /* create backup of background */  
     gdk_draw_drawable(priv->osd.backup,  
         GTK_WIDGET(map)->style->fg_gc[GTK_WIDGET_STATE(GTK_WIDGET(map))],  
                       priv->pixmap, x-1, y-1, 0, 0, OSD_W+2, OSD_H+2);  
1518    
1519      priv->osd.backup_x = x-1;  #ifdef OSD_CROSSHAIR
1520      priv->osd.backup_y = y-1;      osd_render_crosshair(osd);
1521    #endif
1522    
1523    #ifdef OSD_COORDINATES
1524        osd_render_coordinates(osd);
1525    #endif
1526    }
1527    
1528    static void
1529    osd_draw(osm_gps_map_osd_t *osd, GdkDrawable *drawable)
1530    {
1531        osd_priv_t *priv = (osd_priv_t*)osd->priv;
1532    
1533      /* OSD itself uses some off-screen rendering, so check if the */      /* OSD itself uses some off-screen rendering, so check if the */
1534      /* offscreen buffer is present and create it if not */      /* offscreen buffer is present and create it if not */
1535      if(!priv->osd.overlay) {      if(!priv->controls.surface) {
1536          /* create overlay ... */          /* create overlay ... */
1537          priv->osd.overlay =          priv->controls.surface =
1538              cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W, OSD_H);              cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W+2, OSD_H+2);
1539    
1540            priv->controls.rendered = FALSE;
1541    #ifdef OSD_GPS_BUTTON
1542            priv->controls.gps_enabled = FALSE;
1543    #endif
1544    
1545    #ifdef OSD_SOURCE_SEL
1546            /* the initial OSD state is alway not-expanded */
1547            priv->source_sel.surface =
1548                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1549                                               OSD_S_W+2, OSD_S_H+2);
1550            priv->source_sel.rendered = FALSE;
1551    #endif
1552    
1553    #ifdef OSD_SCALE
1554            priv->scale.surface =
1555                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1556                                           OSD_SCALE_W, OSD_SCALE_H);
1557            priv->scale.zoom = -1;
1558    #endif
1559    
1560    #ifdef OSD_CROSSHAIR
1561            priv->crosshair.surface =
1562                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1563                                           OSD_CROSSHAIR_W, OSD_CROSSHAIR_H);
1564            priv->crosshair.rendered = FALSE;
1565    #endif
1566    
1567    #ifdef OSD_COORDINATES
1568            priv->coordinates.surface =
1569                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1570                                           OSD_COORDINATES_W, OSD_COORDINATES_H);
1571    
1572            priv->coordinates.lat = priv->coordinates.lon = OSM_GPS_MAP_INVALID;
1573    #endif
1574    
1575          /* ... and render it */          /* ... and render it */
1576          osm_gps_map_osd_render(priv);          osd_render(osd);
1577      }      }
1578    
1579      // now draw this onto the original context      // now draw this onto the original context
1580      cairo_t *cr = gdk_cairo_create(priv->pixmap);      cairo_t *cr = gdk_cairo_create(drawable);
1581      cairo_set_source_surface(cr, priv->osd.overlay, x, y);  
1582        int x, y;
1583    
1584    #ifdef OSD_SCALE
1585        x =  OSD_X;
1586        y = -OSD_Y;
1587        if(x < 0) x += osd->widget->allocation.width - OSD_SCALE_W;
1588        if(y < 0) y += osd->widget->allocation.height - OSD_SCALE_H;
1589    
1590        cairo_set_source_surface(cr, priv->scale.surface, x, y);
1591        cairo_paint(cr);
1592    #endif
1593    
1594    #ifdef OSD_CROSSHAIR
1595        x = (osd->widget->allocation.width - OSD_CROSSHAIR_W)/2;
1596        y = (osd->widget->allocation.height - OSD_CROSSHAIR_H)/2;
1597    
1598        cairo_set_source_surface(cr, priv->crosshair.surface, x, y);
1599        cairo_paint(cr);
1600    #endif
1601    
1602    #ifdef OSD_COORDINATES
1603        x = -OSD_X;
1604        y = -OSD_Y;
1605        if(x < 0) x += osd->widget->allocation.width - OSD_COORDINATES_W;
1606        if(y < 0) y += osd->widget->allocation.height - OSD_COORDINATES_H;
1607    
1608        cairo_set_source_surface(cr, priv->coordinates.surface, x, y);
1609        cairo_paint(cr);
1610    #endif
1611    
1612        x = OSD_X;
1613        if(x < 0)
1614            x += osd->widget->allocation.width - OSD_W;
1615    
1616        y = OSD_Y;
1617        if(y < 0)
1618            y += osd->widget->allocation.height - OSD_H;
1619    
1620        cairo_set_source_surface(cr, priv->controls.surface, x, y);
1621        cairo_paint(cr);
1622    
1623    #ifdef OSD_SOURCE_SEL
1624        if(!priv->source_sel.handler_id) {
1625            /* the OSD source selection is not being animated */
1626            if(!priv->source_sel.expanded)
1627                x = osd->widget->allocation.width - OSD_S_W;
1628            else
1629                x = osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
1630        } else
1631            x = priv->source_sel.shift;
1632    
1633        y = OSD_S_Y;
1634        if(OSD_S_Y < 0) {
1635            if(!priv->source_sel.expanded)
1636                y = osd->widget->allocation.height - OSD_S_H + OSD_S_Y;
1637            else
1638                y = osd->widget->allocation.height - OSD_S_EXP_H + OSD_S_Y;
1639        }
1640    
1641        cairo_set_source_surface(cr, priv->source_sel.surface, x, y);
1642      cairo_paint(cr);      cairo_paint(cr);
1643    #endif
1644    
1645      cairo_destroy(cr);      cairo_destroy(cr);
1646  }  }
1647    
1648  static void  static void
1649  osm_gps_map_osd_restore (OsmGpsMap *map)  osd_free(osm_gps_map_osd_t *osd)
1650  {  {
1651      OsmGpsMapPrivate *priv = map->priv;      osd_priv_t *priv = (osd_priv_t *)(osd->priv);
1652    
1653      /* restore backup of previous contents */      if (priv->controls.surface)
1654      if(priv->osd.backup) {           cairo_surface_destroy(priv->controls.surface);
1655          /* create backup of background */  
1656          gdk_draw_drawable(priv->pixmap,  #ifdef OSD_SOURCE_SEL
1657              GTK_WIDGET(map)->style->fg_gc[GTK_WIDGET_STATE(GTK_WIDGET(map))],      if(priv->source_sel.handler_id)
1658                        priv->osd.backup, 0, 0,          gtk_timeout_remove(priv->source_sel.handler_id);
1659                        priv->osd.backup_x, priv->osd.backup_y, OSD_W+2, OSD_H+2);  
1660      }      if (priv->source_sel.surface)
1661             cairo_surface_destroy(priv->source_sel.surface);
1662    #endif
1663    
1664    #ifdef OSD_SCALE
1665        if (priv->scale.surface)
1666             cairo_surface_destroy(priv->scale.surface);
1667    #endif
1668    
1669    #ifdef OSD_CROSSHAIR
1670        if (priv->crosshair.surface)
1671             cairo_surface_destroy(priv->crosshair.surface);
1672    #endif
1673    
1674    #ifdef OSD_COORDINATES
1675        if (priv->coordinates.surface)
1676             cairo_surface_destroy(priv->coordinates.surface);
1677    #endif
1678    
1679    #ifdef OSD_BALLOON
1680        if (priv->balloon.surface)
1681             cairo_surface_destroy(priv->balloon.surface);
1682    #endif
1683    
1684        g_free(priv);
1685  }  }
1686    
1687  static void  static gboolean
1688  osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdGpsCallback cb, gpointer data)  osd_busy(osm_gps_map_osd_t *osd)
1689  {  {
1690      OsmGpsMapPrivate *priv;  #ifdef OSD_SOURCE_SEL
1691        osd_priv_t *priv = (osd_priv_t *)(osd->priv);
1692        return (priv->source_sel.handler_id != 0);
1693    #else
1694        return FALSE;
1695    #endif
1696    }
1697    
1698      g_return_if_fail (OSM_IS_GPS_MAP (map));  static osm_gps_map_osd_t osd_classic = {
1699      priv = map->priv;      .widget     = NULL,
1700    
1701      priv->osd.cb = cb;      .draw       = osd_draw,
1702      priv->osd.data = data;      .check      = osd_check,
1703        .render     = osd_render,
1704        .free       = osd_free,
1705        .busy       = osd_busy,
1706    
1707        .cb         = NULL,
1708        .data       = NULL,
1709    
1710        .priv       = NULL
1711    };
1712    
1713    /* this is the only function that's externally visible */
1714    void
1715    osm_gps_map_osd_classic_init(OsmGpsMap *map)
1716    {
1717        osd_priv_t *priv = osd_classic.priv = g_new0(osd_priv_t, 1);
1718    
1719    #ifdef OSD_BALLOON
1720        priv->balloon.lat = OSM_GPS_MAP_INVALID;
1721        priv->balloon.lon = OSM_GPS_MAP_INVALID;
1722    #endif
1723    
1724        osd_classic.priv = priv;
1725    
1726        osm_gps_map_register_osd(map, &osd_classic);
1727    }
1728    
1729    #ifdef OSD_GPS_BUTTON
1730    /* below are osd specific functions which aren't used by osm-gps-map */
1731    /* but instead are to be used by the main application */
1732    void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb,
1733                                     gpointer data) {
1734        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1735        g_return_if_fail (osd);
1736    
1737        osd->cb = cb;
1738        osd->data = data;
1739    
1740      /* this may have changed the state of the gps button */      /* this may have changed the state of the gps button */
1741      /* we thus re-render the overlay */      /* we thus re-render the overlay */
1742      osm_gps_map_osd_render(priv);      osd->render(osd);
1743    
1744      osm_gps_map_map_redraw_idle(map);      osm_gps_map_redraw(map);
1745    }
1746    #endif
1747    
1748    osd_button_t
1749    osm_gps_map_osd_check(OsmGpsMap *map, gint x, gint y) {
1750        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1751        g_return_val_if_fail (osd, OSD_NONE);
1752    
1753        return osd_check(osd, x, y);
1754  }  }
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