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 103 by harbaum, Wed Sep 9 11:50:50 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 OSD_SCALE_FONT_SIZE
29    #define OSD_SCALE_FONT_SIZE 12
30    #endif
31    #define OSD_SCALE_W   (10*OSD_SCALE_FONT_SIZE)
32    #define OSD_SCALE_H   (5*OSD_SCALE_FONT_SIZE/2)
33    
34  #ifndef USE_CAIRO  #ifndef USE_CAIRO
35  #error "OSD control display lacks a non-cairo implementation!"  #error "OSD control display lacks a non-cairo implementation!"
# Line 29  Line 38 
38  #include <cairo.h>  #include <cairo.h>
39    
40  #include "osm-gps-map.h"  #include "osm-gps-map.h"
41    #include "osm-gps-map-osd-classic.h"
42    
43  //the osd controls  //the osd controls
44  typedef struct {  typedef struct {
45      GdkPixmap *backup;      /* the offscreen representation of the OSD */
     gint backup_x, backup_y;  
   
46      cairo_surface_t *overlay;      cairo_surface_t *overlay;
47    
48      OsmGpsMapOsdGpsCallback cb;  #ifdef OSD_SCALE
49      gpointer data;      cairo_surface_t *scale;
50  } osd_priv_t;      int scale_zoom;
51    #endif
 /* the osd structure mainly contains various callbacks */  
 /* required to draw and update the OSD */  
 typedef struct {  
   
     void(enable_gps)(OsmGpsMap *, OsmGpsMapOsdGpsCallback, gpointer);  
     void(restore)(OsmGpsMap*);  
     void(draw)(OsmGpsMap *, gint, gint);  
     void(render)(OsmGpsMapPrivate *);  
     osd_button_t(*check)(gint, gint);       /* check if x/y lies within OSD */  
     void(free)(gpointer);  
   
     gpointer priv;  
 } osm_gps_map_osd_t;  
   
 static osm_gps_map_osd_t osd_classic = {  
     .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;  
 }  
   
 /* this is the only function that's externally visible */  
 osm_gps_map_osd_t *  
 osm_gps_map_osd_classic_init(void)  
 {  
     return osd_classic;  
 }  
   
 static void  
 osm_gps_map_osd_free(gpointer priv_ptr)  
 {  
     osd_priv_t *priv = (osd_priv_t *)priv_ptr;  
52    
53    #ifdef OSD_SOURCE_SEL
54        /* values to handle the "source" menu */
55        cairo_surface_t *map_source;
56        gboolean expanded;
57        gint shift, dir, count;
58        gint handler_id;
59        gint width, height;
60    #endif
61    
62      g_free(priv);  } osd_priv_t;
 }  
63    
64  /* position and extent of bounding box */  /* position and extent of bounding box */
65    #ifndef OSD_X
66  #define OSD_X      (10)  #define OSD_X      (10)
67  #define OSD_Y      (10)  #endif
68    
69  #define OSD_COLOR            0.5, 0.5, 1  #ifndef OSD_Y
70  #define OSD_COLOR_DISABLED   0.8, 0.8, 0.8  #define OSD_Y      (10)
71    #endif
72    
73  /* parameters of the direction shape */  /* parameters of the direction shape */
74  #ifndef OSM_GPS_MAP_OSD_DIAMETER  #ifndef OSD_DIAMETER
75  #define D_RAD  (30)         // diameter of dpad  #define D_RAD  (30)         // diameter of dpad
76  #else  #else
77  #define D_RAD  (OSM_GPS_MAP_OSD_DIAMETER)  #define D_RAD  (OSD_DIAMETER)
78  #endif  #endif
79  #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
80  #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 84  osm_gps_map_osd_free(gpointer priv_ptr)
84  #define Z_STEP   (D_RAD/4)  // distance between dpad and zoom  #define Z_STEP   (D_RAD/4)  // distance between dpad and zoom
85  #define Z_RAD    (D_RAD/2)  // radius of "caps" of zoom bar  #define Z_RAD    (D_RAD/2)  // radius of "caps" of zoom bar
86    
87    #ifdef OSD_SHADOW_ENABLE
88  /* shadow also depends on control size */  /* shadow also depends on control size */
89  #define OSD_SHADOW (D_RAD/6)  #define OSD_SHADOW (D_RAD/6)
90    #else
91    #define OSD_SHADOW (0)
92    #endif
93    
94    /* normally the GPS button is in the center of the dpad. if there's */
95    /* no dpad it will go into the zoom area */
96    #if defined(OSD_GPS_BUTTON) && defined(OSD_NO_DPAD)
97    #define Z_GPS  1
98    #else
99    #define Z_GPS  0
100    #endif
101    
102  /* total width and height of controls incl. shadow */  /* total width and height of controls incl. shadow */
103  #define OSD_W    (2*D_RAD + OSD_SHADOW)  #define OSD_W    (2*D_RAD + OSD_SHADOW + Z_GPS * 2 * Z_RAD)
104    #if !Z_GPS
105  #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)
106    #else
107    #define OSD_H    (2*Z_RAD + OSD_SHADOW)
108    #endif
109    
110    #ifdef OSD_SHADOW_ENABLE
111  #define OSD_LBL_SHADOW (OSD_SHADOW/2)  #define OSD_LBL_SHADOW (OSD_SHADOW/2)
112    #endif
113    
114    #define Z_TOP    ((1-Z_GPS) * (2 * D_RAD + Z_STEP))
115    
 #define Z_TOP    (2 * D_RAD + Z_STEP)  
116  #define Z_MID    (Z_TOP + Z_RAD)  #define Z_MID    (Z_TOP + Z_RAD)
117  #define Z_BOT    (Z_MID + Z_RAD)  #define Z_BOT    (Z_MID + Z_RAD)
118  #define Z_LEFT   (Z_RAD)  #define Z_LEFT   (Z_RAD)
119  #define Z_RIGHT  (2 * D_RAD - Z_RAD)  #define Z_RIGHT  (2 * D_RAD - Z_RAD + Z_GPS * 2 * Z_RAD)
120    #define Z_CENTER ((Z_RIGHT + Z_LEFT)/2)
121    
122  /* create the cairo shape used for the zoom buttons */  /* create the cairo shape used for the zoom buttons */
123  static void  static void
124  osm_gps_map_osd_zoom_shape(cairo_t *cr, gint x, gint y)  osd_zoom_shape(cairo_t *cr, gint x, gint y)
125  {  {
126      cairo_move_to (cr, x+Z_LEFT,    y+Z_TOP);      cairo_move_to (cr, x+Z_LEFT,    y+Z_TOP);
127      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 130  osm_gps_map_osd_zoom_shape(cairo_t *cr,
130      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);
131  }  }
132    
133    /* ------------------- color/shadow functions ----------------- */
134    
135    #ifndef OSD_COLOR
136    /* if no color has been specified we just use the gdks default colors */
137    static void
138    osd_labels(cairo_t *cr, gint width, gboolean enabled,
139                           GdkColor *fg, GdkColor *disabled) {
140        if(enabled)  gdk_cairo_set_source_color(cr, fg);
141        else         gdk_cairo_set_source_color(cr, disabled);
142        cairo_set_line_width (cr, width);
143    }
144    #else
145    static void
146    osd_labels(cairo_t *cr, gint width, gboolean enabled) {
147        if(enabled)  cairo_set_source_rgb (cr, OSD_COLOR);
148        else         cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);
149        cairo_set_line_width (cr, width);
150    }
151    #endif
152    
153    #ifdef OSD_SHADOW_ENABLE
154    static void
155    osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {
156        cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);
157        cairo_set_line_width (cr, width);
158    }
159    #endif
160    
161    #ifndef OSD_NO_DPAD
162  /* create the cairo shape used for the dpad */  /* create the cairo shape used for the dpad */
163  static void  static void
164  osm_gps_map_osd_dpad_shape(cairo_t *cr, gint x, gint y)  osd_dpad_shape(cairo_t *cr, gint x, gint y)
165  {  {
166      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);
167  }  }
168    #endif
169    
170    #ifdef OSD_SHADOW_ENABLE
171    static void
172    osd_shape_shadow(cairo_t *cr) {
173        cairo_set_source_rgba (cr, 0, 0, 0, 0.2);
174        cairo_fill (cr);
175        cairo_stroke (cr);
176    }
177    #endif
178    
179    #ifndef OSD_COLOR
180    /* if no color has been specified we just use the gdks default colors */
181    static void
182    osd_shape(cairo_t *cr, GdkColor *bg, GdkColor *fg) {
183        gdk_cairo_set_source_color(cr, bg);
184        cairo_fill_preserve (cr);
185        gdk_cairo_set_source_color(cr, fg);
186        cairo_set_line_width (cr, 1);
187        cairo_stroke (cr);
188    }
189    #else
190    static void
191    osd_shape(cairo_t *cr) {
192        cairo_set_source_rgb (cr, OSD_COLOR_BG);
193        cairo_fill_preserve (cr);
194        cairo_set_source_rgb (cr, OSD_COLOR);
195        cairo_set_line_width (cr, 1);
196        cairo_stroke (cr);
197    }
198    #endif
199    
200    
201  static gboolean  static gboolean
202  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 204  osm_gps_map_in_circle(gint x, gint y, gi
204      return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);      return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);
205  }  }
206    
207    #ifndef OSD_NO_DPAD
208  /* check whether x/y is within the dpad */  /* check whether x/y is within the dpad */
209  static osd_button_t  static osd_button_t
210  osm_gps_map_osd_check_dpad(gint x, gint y)  osd_check_dpad(gint x, gint y)
211  {  {
212      /* within entire dpad circle */      /* within entire dpad circle */
213      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))
214      {      {
215          /* convert into position relative to dpads centre */          /* convert into position relative to dpads centre */
216          x -= (OSD_X + D_RAD);          x -= D_RAD;
217          y -= (OSD_Y + D_RAD);          y -= D_RAD;
218    
219    #ifdef OSD_GPS_BUTTON
220          /* check for dpad center goes here! */          /* check for dpad center goes here! */
221          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))
222              return OSD_GPS;              return OSD_GPS;
223    #endif
224    
225          if( y < 0 && abs(x) < abs(y))          if( y < 0 && abs(x) < abs(y))
226              return OSD_UP;              return OSD_UP;
# Line 173  osm_gps_map_osd_check_dpad(gint x, gint Line 238  osm_gps_map_osd_check_dpad(gint x, gint
238      }      }
239      return OSD_NONE;      return OSD_NONE;
240  }  }
241    #endif
242    
243  /* check whether x/y is within the zoom pads */  /* check whether x/y is within the zoom pads */
244  static osd_button_t  static osd_button_t
245  osm_gps_map_osd_check_zoom(gint x, gint y) {  osd_check_zoom(gint x, gint y) {
246      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) {
247    
248          /* within circle around (-) label */          /* within circle around (-) label */
249          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)  
250              return OSD_OUT;              return OSD_OUT;
251    
252          /* within circle around (+) label */          /* within circle around (+) label */
253          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))
254              return OSD_IN;              return OSD_IN;
255    
256    #if Z_GPS == 1
257            /* within square around center */
258            if( x > Z_CENTER - Z_RAD && x < Z_CENTER + Z_RAD)
259                return OSD_GPS;
260    #endif
261    
262            /* between center of (-) button and center of entire zoom control area */
263            if(x > OSD_LEFT && x < D_RAD)
264                return OSD_OUT;
265    
266          /* between center of (+) button and center of entire zoom control area */          /* between center of (+) button and center of entire zoom control area */
267          if(x < OSD_RIGHT && x > OSD_X + D_RAD)          if(x < OSD_RIGHT && x > D_RAD)
268              return OSD_IN;              return OSD_IN;
269      }      }
270    
271      return OSD_NONE;      return OSD_NONE;
272  }  }
273    
274    #ifdef OSD_SOURCE_SEL
275    
276    /* place source selection at right border */
277    #define OSD_S_RAD (Z_RAD)
278    #define OSD_S_X   (-OSD_X)
279    #define OSD_S_Y   (OSD_Y)
280    #define OSD_S_PW  (2 * Z_RAD)
281    #define OSD_S_W   (OSD_S_PW)
282    #define OSD_S_PH  (2 * Z_RAD)
283    #define OSD_S_H   (OSD_S_PH + OSD_SHADOW)
284    
285    /* size of usable area when expanded */
286    #define OSD_S_AREA_W (priv->width)
287    #define OSD_S_AREA_H (priv->height)
288    #define OSD_S_EXP_W  (OSD_S_PW + OSD_S_AREA_W + OSD_SHADOW)
289    #define OSD_S_EXP_H  (OSD_S_AREA_H + OSD_SHADOW)
290    
291    /* internal value to draw the arrow on the "puller" */
292    #define OSD_S_D0  (OSD_S_RAD/2)
293    #ifndef OSD_FONT_SIZE
294    #define OSD_FONT_SIZE 16.0
295    #endif
296    #define OSD_TEXT_BORDER   (OSD_FONT_SIZE/2)
297    #define OSD_TEXT_SKIP     (OSD_FONT_SIZE/8)
298    
299    /* draw the shape of the source selection OSD, either only the puller (not expanded) */
300    /* or the entire menu incl. the puller (expanded) */
301    static void
302    osd_source_shape(osd_priv_t *priv, cairo_t *cr, gint x, gint y) {
303        if(!priv->expanded) {
304            /* just draw the puller */
305            cairo_move_to (cr, x + OSD_S_PW, y + OSD_S_PH);
306            cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
307            cairo_line_to (cr, x + OSD_S_PW, y);
308        } else {
309            /* draw the puller and the area itself */
310            cairo_move_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y + OSD_S_AREA_H);
311            cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H);
312            if(OSD_S_Y > 0) {
313                cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_PH);
314                cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
315            } else {
316                cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_AREA_H-OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
317                cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H - OSD_S_PH);
318                cairo_line_to (cr, x + OSD_S_PW, y);
319            }
320            cairo_line_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y);
321            cairo_close_path (cr);
322        }
323    }
324    
325    static void
326    osd_source_content(osm_gps_map_osd_t *osd, cairo_t *cr, gint offset) {
327        osd_priv_t *priv = (osd_priv_t*)osd->priv;
328    
329        int py = offset + OSD_S_RAD - OSD_S_D0;
330    
331        if(!priv->expanded) {
332            /* draw the "puller" open (<) arrow */
333            cairo_move_to (cr, offset + OSD_S_RAD + OSD_S_D0/2, py);
334            cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
335            cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
336        } else {
337            if(OSD_S_Y < 0)
338                py += OSD_S_AREA_H - OSD_S_PH;
339    
340            /* draw the "puller" close (>) arrow */
341            cairo_move_to (cr, offset + OSD_S_RAD - OSD_S_D0/2, py);
342            cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
343            cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
344            cairo_stroke(cr);
345    
346            /* don't draw a shadow for the text content */
347            if(offset == 1) {
348                gint source;
349                g_object_get(osd->widget, "map-source", &source, NULL);
350    
351                cairo_select_font_face (cr, "Sans",
352                                        CAIRO_FONT_SLANT_NORMAL,
353                                        CAIRO_FONT_WEIGHT_BOLD);
354                cairo_set_font_size (cr, OSD_FONT_SIZE);
355    
356                int i, step = (priv->height - 2*OSD_TEXT_BORDER) /
357                    OSM_GPS_MAP_SOURCE_LAST;
358                for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
359                    cairo_text_extents_t extents;
360                    const char *src = osm_gps_map_source_get_friendly_name(i);
361                    cairo_text_extents (cr, src, &extents);
362    
363                    int x = offset + OSD_S_PW + OSD_TEXT_BORDER;
364                    int y = offset + step * (i-1) + OSD_TEXT_BORDER;
365    
366                    /* draw filled rectangle if selected */
367                    if(source == i) {
368                        cairo_rectangle(cr, x - OSD_TEXT_BORDER/2,
369                                        y - OSD_TEXT_SKIP,
370                                        priv->width - OSD_TEXT_BORDER,
371                                        step + OSD_TEXT_SKIP);
372                        cairo_fill(cr);
373    
374                        /* temprarily draw with background color */
375    #ifndef OSD_COLOR
376                        GdkColor bg = osd->widget->style->bg[GTK_STATE_NORMAL];
377                        gdk_cairo_set_source_color(cr, &bg);
378    #else
379                        cairo_set_source_rgb (cr, OSD_COLOR_BG);
380    #endif
381                    }
382    
383                    cairo_move_to (cr, x, y + OSD_TEXT_SKIP - extents.y_bearing);
384                    cairo_show_text (cr, src);
385    
386                    /* restore color */
387                    if(source == i) {
388    #ifndef OSD_COLOR
389                        GdkColor fg = osd->widget->style->fg[GTK_STATE_NORMAL];
390                        gdk_cairo_set_source_color(cr, &fg);
391    #else
392                        cairo_set_source_rgb (cr, OSD_COLOR);
393    #endif
394                    }
395                }
396            }
397        }
398    }
399    
400    static void
401    osd_render_source_sel(osm_gps_map_osd_t *osd) {
402        osd_priv_t *priv = (osd_priv_t*)osd->priv;
403    
404    #ifndef OSD_COLOR
405        GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
406        GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
407        GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
408    #endif
409    
410        /* draw source selector */
411        cairo_t *cr = cairo_create(priv->map_source);
412        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
413        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
414        cairo_paint(cr);
415        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
416    
417    #ifdef OSD_SHADOW_ENABLE
418        osd_source_shape(priv, cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
419        osd_shape_shadow(cr);
420    #endif
421    
422        osd_source_shape(priv, cr, 1, 1);
423    #ifndef OSD_COLOR
424        osd_shape(cr, &bg, &fg);
425    #else
426        osd_shape(cr);
427    #endif
428    
429    #ifdef OSD_SHADOW_ENABLE
430        osd_labels_shadow(cr, Z_RAD/3, TRUE);
431        osd_source_content(osd, cr, 1+OSD_LBL_SHADOW);
432        cairo_stroke (cr);
433    #endif
434    #ifndef OSD_COLOR
435        osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
436    #else
437        osd_labels(cr, Z_RAD/3, TRUE);
438    #endif
439        osd_source_content(osd, cr, 1);
440        cairo_stroke (cr);
441    
442        cairo_destroy(cr);
443    }
444    
445    /* re-allocate the buffer used to draw the menu. This is used */
446    /* to collapse/expand the buffer */
447    static void
448    osd_source_reallocate(osm_gps_map_osd_t *osd) {
449        osd_priv_t *priv = (osd_priv_t*)osd->priv;
450    
451        /* re-allocate offscreen bitmap */
452        g_assert (priv->map_source);
453    
454        int w = OSD_S_W, h = OSD_S_H;
455        if(priv->expanded) {
456            cairo_text_extents_t extents;
457    
458            /* determine content size */
459            cairo_t *cr = cairo_create(priv->map_source);
460            cairo_select_font_face (cr, "Sans",
461                                    CAIRO_FONT_SLANT_NORMAL,
462                                    CAIRO_FONT_WEIGHT_BOLD);
463            cairo_set_font_size (cr, OSD_FONT_SIZE);
464    
465            /* calculate menu size */
466            int i, max_h = 0, max_w = 0;
467            for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
468                const char *src = osm_gps_map_source_get_friendly_name(i);
469                cairo_text_extents (cr, src, &extents);
470    
471                if(extents.width > max_w) max_w = extents.width;
472                if(extents.height > max_h) max_h = extents.height;
473            }
474            cairo_destroy(cr);
475    
476            priv->width  = max_w + 2*OSD_TEXT_BORDER;
477            priv->height = OSM_GPS_MAP_SOURCE_LAST *
478                (max_h + 2*OSD_TEXT_SKIP) + 2*OSD_TEXT_BORDER;
479    
480            w = OSD_S_EXP_W;
481            h = OSD_S_EXP_H;
482        }
483    
484        cairo_surface_destroy(priv->map_source);
485        priv->map_source =
486            cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w+2, h+2);
487    
488        osd_render_source_sel(osd);
489    }
490    
491    #define OSD_HZ      15
492    #define OSD_TIME    500
493    
494    static gboolean osd_source_animate(gpointer data) {
495        osm_gps_map_osd_t *osd = (osm_gps_map_osd_t*)data;
496        osd_priv_t *priv = (osd_priv_t*)osd->priv;
497        int diff = OSD_S_EXP_W - OSD_S_W - OSD_S_X;
498        gboolean done = FALSE;
499        priv->count += priv->dir;
500    
501        /* shifting in */
502        if(priv->dir < 0) {
503            if(priv->count <= 0) {
504                priv->count = 0;
505                done = TRUE;
506            }
507        } else {
508            if(priv->count >= 1000) {
509                priv->expanded = FALSE;
510                osd_source_reallocate(osd);
511    
512                priv->count = 1000;
513                done = TRUE;
514            }
515        }
516    
517    
518        /* count runs linearly from 0 to 1000, map this nicely onto a position */
519    
520        /* nicer sinoid mapping */
521        float m = 0.5-cos(priv->count * M_PI / 1000.0)/2;
522        priv->shift = (osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X) +
523            m * diff;
524    
525        osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
526    
527        if(done)
528            priv->handler_id = 0;
529    
530        return !done;
531    }
532    
533    /* switch between expand and collapse mode of source selection */
534    static void
535    osd_source_toggle(osm_gps_map_osd_t *osd)
536    {
537        osd_priv_t *priv = (osd_priv_t*)osd->priv;
538    
539        /* ignore clicks while animation is running */
540        if(priv->handler_id)
541            return;
542    
543        /* expand immediately, collapse is handle at the end of the collapse animation */
544        if(!priv->expanded) {
545            priv->expanded = TRUE;
546            osd_source_reallocate(osd);
547    
548            priv->count = 1000;
549            priv->shift = osd->widget->allocation.width - OSD_S_W;
550            priv->dir = -1000/OSD_HZ;
551        } else {
552            priv->count =  0;
553            priv->shift = osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
554            priv->dir = +1000/OSD_HZ;
555        }
556    
557        priv->handler_id = gtk_timeout_add(OSD_TIME/OSD_HZ, osd_source_animate, osd);
558    }
559    
560    /* check if the user clicked inside the source selection area */
561    static osd_button_t
562    osd_source_check(osm_gps_map_osd_t *osd, gint x, gint y) {
563        osd_priv_t *priv = (osd_priv_t*)osd->priv;
564    
565        if(!priv->expanded)
566            x -= osd->widget->allocation.width - OSD_S_W;
567        else
568            x -= osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
569    
570        if(OSD_S_Y > 0)
571            y -= OSD_S_Y;
572        else
573            y -= osd->widget->allocation.height - OSD_S_PH + OSD_S_Y;
574    
575        /* within square around puller? */
576        if(y > 0 && y < OSD_S_PH && x > 0 && x < OSD_S_PW) {
577            /* really within puller shape? */
578            if(x > Z_RAD || osm_gps_map_in_circle(x, y, Z_RAD, Z_RAD, Z_RAD)) {
579                /* expand source selector */
580                osd_source_toggle(osd);
581    
582                /* tell upper layers that user clicked some background element */
583                /* of the OSD */
584                return OSD_BG;
585            }
586        }
587    
588        /* check for clicks into data area */
589        if(priv->expanded && !priv->handler_id) {
590            /* re-adjust from puller top to content top */
591            if(OSD_S_Y < 0)
592                y += OSD_S_EXP_H - OSD_S_PH;
593    
594            if(x > OSD_S_PW &&
595               x < OSD_S_PW + OSD_S_EXP_W &&
596               y > 0 &&
597               y < OSD_S_EXP_H) {
598    
599                int step = (priv->height - 2*OSD_TEXT_BORDER)
600                    / OSM_GPS_MAP_SOURCE_LAST;
601    
602                y -= OSD_TEXT_BORDER - OSD_TEXT_SKIP;
603                y /= step;
604                y += 1;
605    
606                gint old = 0;
607                g_object_get(osd->widget, "map-source", &old, NULL);
608    
609                if(y > OSM_GPS_MAP_SOURCE_NULL &&
610                   y <= OSM_GPS_MAP_SOURCE_LAST &&
611                   old != y) {
612                    g_object_set(osd->widget, "map-source", y, NULL);
613    
614                    osd_render_source_sel(osd);
615                    osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
616                }
617    
618                /* return "clicked in OSD background" to prevent further */
619                /* processing by application */
620                return OSD_BG;
621            }
622        }
623    
624        return OSD_NONE;
625    }
626    #endif // OSD_SOURCE_SEL
627    
628  static osd_button_t  static osd_button_t
629  osm_gps_map_osd_check(gint x, gint y) {  osd_check(osm_gps_map_osd_t *osd, gint x, gint y) {
630      osd_button_t but = OSD_NONE;      osd_button_t but = OSD_NONE;
631    
632    #ifdef OSD_SOURCE_SEL
633        /* the source selection area is handles internally */
634        but = osd_source_check(osd, x, y);
635        if(but != OSD_NONE)
636            return but;
637    #endif
638    
639        x -= OSD_X;
640        y -= OSD_Y;
641    
642        if(OSD_X < 0)
643            x -= (osd->widget->allocation.width - OSD_W);
644    
645        if(OSD_Y < 0)
646            y -= (osd->widget->allocation.height - OSD_H);
647    
648      /* first do a rough test for the OSD area. */      /* first do a rough test for the OSD area. */
649      /* this is just to avoid an unnecessary detailed test */      /* this is just to avoid an unnecessary detailed test */
650      if(x > OSD_X && x < OSD_X + OSD_W &&      if(x > 0 && x < OSD_W && y > 0 && y < OSD_H) {
651         y > OSD_Y && y < OSD_Y + OSD_H) {  #ifndef OSD_NO_DPAD
652          but = osm_gps_map_osd_check_dpad(x, y);          but = osd_check_dpad(x, y);
653    #endif
654    
655          if(but == OSD_NONE)          if(but == OSD_NONE)
656              but = osm_gps_map_osd_check_zoom(x, y);              but = osd_check_zoom(x, y);
657      }      }
658    
659      return but;      return but;
660  }  }
661    
662  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);  
 }  
   
663  static void  static void
664  osm_gps_map_osd_dpad_labels(cairo_t *cr, gint x, gint y) {  osd_dpad_labels(cairo_t *cr, gint x, gint y) {
665      /* move reference to dpad center */      /* move reference to dpad center */
666      x += D_RAD;      x += D_RAD;
667      y += D_RAD;      y += D_RAD;
# Line 256  osm_gps_map_osd_dpad_labels(cairo_t *cr, Line 684  osm_gps_map_osd_dpad_labels(cairo_t *cr,
684          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]);
685      }      }
686  }  }
687    #endif
688    
689  /* draw the sattelite dish icon in the center of the dpad */  #ifdef OSD_GPS_BUTTON
690  #define GPS_V0  (D_RAD/8)  /* draw the satellite dish icon in the center of the dpad */
691    #define GPS_V0  (D_RAD/7)
692  #define GPS_V1  (D_RAD/10)  #define GPS_V1  (D_RAD/10)
693  #define GPS_V2  (D_RAD/5)  #define GPS_V2  (D_RAD/5)
694    
695  /* draw a satellite receiver dish */  /* draw a satellite receiver dish */
696    /* this is either drawn in the center of the dpad (if present) */
697    /* or in the middle of the zoom area */
698  static void  static void
699  osm_gps_map_osd_dpad_gps(cairo_t *cr, gint x, gint y) {  osd_dpad_gps(cairo_t *cr, gint x, gint y) {
700      /* move reference to dpad center */      /* move reference to dpad center */
701      x += D_RAD;      x += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD * 3;
702      y += D_RAD + GPS_V0;      y += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD + GPS_V0;
703    
704      cairo_move_to (cr, x-GPS_V0, y+GPS_V0);      cairo_move_to (cr, x-GPS_V0, y+GPS_V0);
705      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 714  osm_gps_map_osd_dpad_gps(cairo_t *cr, gi
714      cairo_move_to (cr, x, y-GPS_V2);      cairo_move_to (cr, x, y-GPS_V2);
715      cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);      cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);
716  }  }
717    #endif
718    
719  #define Z_LEN  (2*Z_RAD/3)  #define Z_LEN  (2*Z_RAD/3)
720    
721  static void  static void
722  osm_gps_map_osd_zoom_labels(cairo_t *cr, gint x, gint y) {  osd_zoom_labels(cairo_t *cr, gint x, gint y) {
723      cairo_move_to (cr, x + Z_LEFT  - Z_LEN, y + Z_MID);      cairo_move_to (cr, x + Z_LEFT  - Z_LEN, y + Z_MID);
724      cairo_line_to (cr, x + Z_LEFT  + Z_LEN, y + Z_MID);      cairo_line_to (cr, x + Z_LEFT  + Z_LEN, y + Z_MID);
725    
# Line 296  osm_gps_map_osd_zoom_labels(cairo_t *cr, Line 729  osm_gps_map_osd_zoom_labels(cairo_t *cr,
729      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);
730  }  }
731    
732    /* various parameters used to create the scale */
733    #define OSD_SCALE_H2   (OSD_SCALE_H/2)
734    #define OSD_SCALE_TICK (2*OSD_SCALE_FONT_SIZE/3)
735    #define OSD_SCALE_M    (OSD_SCALE_H2 - OSD_SCALE_TICK)
736    #define OSD_SCALE_I    (OSD_SCALE_H2 + OSD_SCALE_TICK)
737    #define OSD_SCALE_FD   (OSD_SCALE_FONT_SIZE/4)
738    
739  static void  static void
740  osm_gps_map_osd_labels(cairo_t *cr, gint width, gboolean enabled) {  osd_render_scale(osm_gps_map_osd_t *osd)
741      if(enabled)  cairo_set_source_rgb (cr, OSD_COLOR);  {
742      else         cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);      osd_priv_t *priv = (osd_priv_t*)osd->priv;
     cairo_set_line_width (cr, width);  
     cairo_stroke (cr);  
 }  
743    
744  static void      /* this only needs to be rendered if the zoom has changed */
745  osm_gps_map_osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {      gint zoom;
746      cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);      g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);
747      cairo_set_line_width (cr, width);      if(zoom == priv->scale_zoom)
748            return;
749    
750        priv->scale_zoom = zoom;
751    
752        float m_per_pix = osm_gps_map_get_scale(OSM_GPS_MAP(osd->widget));
753    
754        /* first fill with transparency */
755        cairo_t *cr = cairo_create(priv->scale);
756        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
757        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
758        // pink for testing:    cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2);
759        cairo_paint(cr);
760        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
761    
762        /* determine the size of the scale width in meters */
763        float width = (OSD_SCALE_W-OSD_SCALE_FONT_SIZE/6) * m_per_pix;
764    
765        /* scale this to useful values */
766        int exp = logf(width)*M_LOG10E;
767        int mant = width/pow(10,exp);
768        int width_metric = mant * pow(10,exp);
769        char *dist_str = NULL;
770        if(width_metric<1000)
771            dist_str = g_strdup_printf("%u m", width_metric);
772        else
773            dist_str = g_strdup_printf("%u km", width_metric/1000);
774        width_metric /= m_per_pix;
775    
776        /* and now the hard part: scale for useful imperial values :-( */
777        /* try to convert to feet, 1ft == 0.3048 m */
778        width /= 0.3048;
779        float imp_scale = 0.3048;
780        char *dist_imp_unit = "ft";
781    
782        if(width >= 100) {
783            /* 1yd == 3 feet */
784            width /= 3.0;
785            imp_scale *= 3.0;
786            dist_imp_unit = "yd";
787    
788            if(width >= 1760.0) {
789                /* 1mi == 1760 yd */
790                width /= 1760.0;
791                imp_scale *= 1760.0;
792                dist_imp_unit = "mi";
793            }
794        }
795    
796        /* also convert this to full tens/hundreds */
797        exp = logf(width)*M_LOG10E;
798        mant = width/pow(10,exp);
799        int width_imp = mant * pow(10,exp);
800        char *dist_str_imp = g_strdup_printf("%u %s", width_imp, dist_imp_unit);
801    
802        /* convert back to pixels */
803        width_imp *= imp_scale;
804        width_imp /= m_per_pix;
805    
806        cairo_select_font_face (cr, "Sans",
807                                CAIRO_FONT_SLANT_NORMAL,
808                                CAIRO_FONT_WEIGHT_BOLD);
809        cairo_set_font_size (cr, OSD_SCALE_FONT_SIZE);
810        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
811    
812        cairo_text_extents_t extents;
813        cairo_text_extents (cr, dist_str, &extents);
814    
815        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
816        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6);
817        cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD);
818        cairo_text_path (cr, dist_str);
819        cairo_stroke (cr);
820        cairo_move_to (cr, 2*OSD_SCALE_FD,
821                       OSD_SCALE_H2+OSD_SCALE_FD + extents.height);
822        cairo_text_path (cr, dist_str_imp);
823      cairo_stroke (cr);      cairo_stroke (cr);
824    
825        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
826        cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD);
827        cairo_show_text (cr, dist_str);
828        cairo_move_to (cr, 2*OSD_SCALE_FD,
829                       OSD_SCALE_H2+OSD_SCALE_FD + extents.height);
830        cairo_show_text (cr, dist_str_imp);
831    
832        g_free(dist_str);
833        g_free(dist_str_imp);
834    
835        /* draw white line */
836        cairo_set_line_cap  (cr, CAIRO_LINE_CAP_ROUND);
837        cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);
838        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/3);
839        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M);
840        cairo_rel_line_to (cr, 0,  OSD_SCALE_TICK);
841        cairo_rel_line_to (cr, width_metric, 0);
842        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
843        cairo_stroke(cr);
844        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I);
845        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
846        cairo_rel_line_to (cr, width_imp, 0);
847        cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK);
848        cairo_stroke(cr);
849    
850        /* draw black line */
851        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
852        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6);
853        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M);
854        cairo_rel_line_to (cr, 0,  OSD_SCALE_TICK);
855        cairo_rel_line_to (cr, width_metric, 0);
856        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
857        cairo_stroke(cr);
858        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I);
859        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
860        cairo_rel_line_to (cr, width_imp, 0);
861        cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK);
862        cairo_stroke(cr);
863    
864        cairo_destroy(cr);
865  }  }
866    
867  static void  static void
868  osm_gps_map_osd_render(OsmGpsMapPrivate *priv) {  osd_render(osm_gps_map_osd_t *osd)
869    {
870        osd_priv_t *priv = (osd_priv_t*)osd->priv;
871    
872    #ifndef OSD_COLOR
873        GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
874        GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
875        GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
876    #endif
877    
878      /* first fill with transparency */      /* first fill with transparency */
879      cairo_t *cr = cairo_create(priv->osd.overlay);      cairo_t *cr = cairo_create(priv->overlay);
880      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
881      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);
882      cairo_paint(cr);      cairo_paint(cr);
   
883      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
884    
885      /* --------- draw zoom and dpad shape shadow ----------- */      /* --------- draw zoom and dpad shape shadow ----------- */
886      gint x = 0, y = 0;  #ifdef OSD_SHADOW_ENABLE
887        osd_zoom_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
888      osm_gps_map_osd_zoom_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);      osd_shape_shadow(cr);
889      osm_gps_map_osd_shape_shadow(cr);  #ifndef OSD_NO_DPAD
890      osm_gps_map_osd_dpad_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);      osd_dpad_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
891      osm_gps_map_osd_shape_shadow(cr);      osd_shape_shadow(cr);
892    #endif
893    #endif
894    
895      /* --------- draw zoom and dpad shape ----------- */      /* --------- draw zoom and dpad shape ----------- */
896    
897      osm_gps_map_osd_zoom_shape(cr, x, y);      osd_zoom_shape(cr, 1, 1);
898      osm_gps_map_osd_shape(cr);  #ifndef OSD_COLOR
899      osm_gps_map_osd_dpad_shape(cr, x, y);      osd_shape(cr, &bg, &fg);
900      osm_gps_map_osd_shape(cr);  #else
901        osd_shape(cr);
902    #endif
903    #ifndef OSD_NO_DPAD
904        osd_dpad_shape(cr, 1, 1);
905    #ifndef OSD_COLOR
906        osd_shape(cr, &bg, &fg);
907    #else
908        osd_shape(cr);
909    #endif
910    #endif
911    
912      /* --------- draw zoom and dpad labels --------- */      /* --------- draw zoom and dpad labels --------- */
913    
914      osm_gps_map_osd_zoom_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);  #ifdef OSD_SHADOW_ENABLE
915      osm_gps_map_osd_dpad_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);      osd_labels_shadow(cr, Z_RAD/3, TRUE);
916      osm_gps_map_osd_labels_shadow(cr, Z_RAD/3, TRUE);      osd_zoom_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
917      osm_gps_map_osd_dpad_gps(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);  #ifndef OSD_NO_DPAD
918      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);
919    #endif
920      osm_gps_map_osd_zoom_labels(cr, x, y);      cairo_stroke(cr);
921      osm_gps_map_osd_dpad_labels(cr, x, y);  #ifdef OSD_GPS_BUTTON
922      osm_gps_map_osd_labels(cr, Z_RAD/3, TRUE);      osd_labels_shadow(cr, Z_RAD/6, osd->cb != NULL);
923      osm_gps_map_osd_dpad_gps(cr, x, y);      osd_dpad_gps(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
924      osm_gps_map_osd_labels(cr, Z_RAD/6, priv->osd.cb != NULL);      cairo_stroke(cr);
925    #endif
926    #endif
927    
928    #ifndef OSD_COLOR
929        osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
930    #else
931        osd_labels(cr, Z_RAD/3, TRUE);
932    #endif
933        osd_zoom_labels(cr, 1, 1);
934    #ifndef OSD_NO_DPAD
935        osd_dpad_labels(cr, 1, 1);
936    #endif
937        cairo_stroke(cr);
938    
939    #ifndef OSD_COLOR
940        osd_labels(cr, Z_RAD/6, osd->cb != NULL, &fg, &da);
941    #else
942        osd_labels(cr, Z_RAD/6, osd->cb != NULL);
943    #endif
944    #ifdef OSD_GPS_BUTTON
945        osd_dpad_gps(cr, 1, 1);
946    #endif
947        cairo_stroke(cr);
948    
949      cairo_destroy(cr);      cairo_destroy(cr);
950    
951    #ifdef OSD_SOURCE_SEL
952        osd_render_source_sel(osd);
953    #endif
954    
955    #ifdef OSD_SCALE
956        osd_render_scale(osd);
957    #endif
958  }  }
959    
960  static void  static void
961  osm_gps_map_osd_draw_controls (OsmGpsMap *map, gint xoffset, gint yoffset)  osd_draw(osm_gps_map_osd_t *osd, GdkDrawable *drawable)
962  {  {
963      OsmGpsMapPrivate *priv = map->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
   
     /* backup previous contents */  
     if(!priv->osd.backup)  
         priv->osd.backup = gdk_pixmap_new(priv->pixmap, OSD_W+2, OSD_H+2, -1);  
   
     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);  
   
     priv->osd.backup_x = x-1;  
     priv->osd.backup_y = y-1;  
964    
965      /* OSD itself uses some off-screen rendering, so check if the */      /* OSD itself uses some off-screen rendering, so check if the */
966      /* offscreen buffer is present and create it if not */      /* offscreen buffer is present and create it if not */
967      if(!priv->osd.overlay) {      if(!priv->overlay) {
968          /* create overlay ... */          /* create overlay ... */
969          priv->osd.overlay =          priv->overlay =
970              cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W, OSD_H);              cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W+2, OSD_H+2);
971    
972    #ifdef OSD_SOURCE_SEL
973            /* the initial OSD state is alway not-expanded */
974            priv->map_source =
975                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
976                                               OSD_S_W+2, OSD_S_H+2);
977    #endif
978    
979    #ifdef OSD_SCALE
980            priv->scale =
981                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
982                                           OSD_SCALE_W, OSD_SCALE_H);
983            priv->scale_zoom = -1;
984    #endif
985    
986          /* ... and render it */          /* ... and render it */
987          osm_gps_map_osd_render(priv);          osd_render(osd);
988      }      }
989    
990      // now draw this onto the original context      // now draw this onto the original context
991      cairo_t *cr = gdk_cairo_create(priv->pixmap);      cairo_t *cr = gdk_cairo_create(drawable);
992      cairo_set_source_surface(cr, priv->osd.overlay, x, y);  
993        int x = OSD_X, y = OSD_Y;
994        if(OSD_X < 0)
995            x = osd->widget->allocation.width - OSD_W + OSD_X;
996    
997        if(OSD_Y < 0)
998            y = osd->widget->allocation.height - OSD_H + OSD_Y;
999    
1000        cairo_set_source_surface(cr, priv->overlay, x, y);
1001      cairo_paint(cr);      cairo_paint(cr);
1002    
1003    #ifdef OSD_SOURCE_SEL
1004        if(!priv->handler_id) {
1005            /* the OSD source selection is not being animated */
1006            if(!priv->expanded)
1007                x = osd->widget->allocation.width - OSD_S_W;
1008            else
1009                x = osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
1010        } else
1011            x = priv->shift;
1012    
1013        y = OSD_S_Y;
1014        if(OSD_S_Y < 0) {
1015            if(!priv->expanded)
1016                y = osd->widget->allocation.height - OSD_S_H + OSD_S_Y;
1017            else
1018                y = osd->widget->allocation.height - OSD_S_EXP_H + OSD_S_Y;
1019        }
1020    
1021        cairo_set_source_surface(cr, priv->map_source, x, y);
1022        cairo_paint(cr);
1023    #endif
1024    
1025    #ifdef OSD_SCALE
1026        x =  OSD_X;
1027        y = -OSD_Y;
1028        if(x < 0) x += osd->widget->allocation.width - OSD_SCALE_W;
1029        if(y < 0) y += osd->widget->allocation.height - OSD_SCALE_H;
1030    
1031        cairo_set_source_surface(cr, priv->scale, x, y);
1032        cairo_paint(cr);
1033    #endif
1034    
1035      cairo_destroy(cr);      cairo_destroy(cr);
1036  }  }
1037    
1038  static void  static void
1039  osm_gps_map_osd_restore (OsmGpsMap *map)  osd_free(osm_gps_map_osd_t *osd)
1040  {  {
1041      OsmGpsMapPrivate *priv = map->priv;      osd_priv_t *priv = (osd_priv_t *)(osd->priv);
1042    
1043      /* restore backup of previous contents */      if (priv->overlay)
1044      if(priv->osd.backup) {           cairo_surface_destroy(priv->overlay);
1045          /* create backup of background */  
1046          gdk_draw_drawable(priv->pixmap,  #ifdef OSD_SOURCE_SEL
1047              GTK_WIDGET(map)->style->fg_gc[GTK_WIDGET_STATE(GTK_WIDGET(map))],      if(priv->handler_id)
1048                        priv->osd.backup, 0, 0,          gtk_timeout_remove(priv->handler_id);
1049                        priv->osd.backup_x, priv->osd.backup_y, OSD_W+2, OSD_H+2);  
1050      }      if (priv->map_source)
1051             cairo_surface_destroy(priv->map_source);
1052    #endif
1053    
1054    #ifdef OSD_SCALE
1055        if (priv->scale)
1056             cairo_surface_destroy(priv->scale);
1057    #endif
1058    
1059        g_free(priv);
1060  }  }
1061    
1062  static void  static gboolean
1063  osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdGpsCallback cb, gpointer data)  osd_busy(osm_gps_map_osd_t *osd)
1064  {  {
1065      OsmGpsMapPrivate *priv;  #ifdef OSD_SOURCE_SEL
1066        osd_priv_t *priv = (osd_priv_t *)(osd->priv);
1067        return (priv->handler_id != 0);
1068    #else
1069        return FALSE;
1070    #endif
1071    }
1072    
1073    static osm_gps_map_osd_t osd_classic = {
1074        .widget     = NULL,
1075    
1076        .draw       = osd_draw,
1077        .check      = osd_check,
1078        .render     = osd_render,
1079        .free       = osd_free,
1080        .busy       = osd_busy,
1081    
1082        .cb         = NULL,
1083        .data       = NULL,
1084    
1085        .priv       = NULL
1086    };
1087    
1088    /* this is the only function that's externally visible */
1089    void
1090    osm_gps_map_osd_classic_init(OsmGpsMap *map)
1091    {
1092        osd_priv_t *priv = osd_classic.priv = g_new0(osd_priv_t, 1);
1093    
1094        osd_classic.priv = priv;
1095    
1096        osm_gps_map_register_osd(map, &osd_classic);
1097    }
1098    
1099      g_return_if_fail (OSM_IS_GPS_MAP (map));  #ifdef OSD_GPS_BUTTON
1100      priv = map->priv;  /* below are osd specific functions which aren't used by osm-gps-map */
1101    /* but instead are to be used by the main application */
1102    void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb,
1103                                     gpointer data) {
1104        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1105        g_return_if_fail (osd);
1106    
1107      priv->osd.cb = cb;      osd->cb = cb;
1108      priv->osd.data = data;      osd->data = data;
1109    
1110      /* this may have changed the state of the gps button */      /* this may have changed the state of the gps button */
1111      /* we thus re-render the overlay */      /* we thus re-render the overlay */
1112      osm_gps_map_osd_render(priv);      osd->render(osd);
1113    
1114      osm_gps_map_map_redraw_idle(map);      osm_gps_map_redraw(map);
1115    }
1116    #endif
1117    
1118    osd_button_t
1119    osm_gps_map_osd_check(OsmGpsMap *map, gint x, gint y) {
1120        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1121        g_return_val_if_fail (osd, OSD_NONE);
1122    
1123        return osd_check(osd, x, y);
1124  }  }
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  Added in v.103