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 99 by harbaum, Mon Sep 7 19:22:02 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    #define OSD_SCALE
29    
30    #define OSD_SCALE_W  100
31    #define OSD_SCALE_H   20
32    
33  #ifndef USE_CAIRO  #ifndef USE_CAIRO
34  #error "OSD control display lacks a non-cairo implementation!"  #error "OSD control display lacks a non-cairo implementation!"
# Line 29  Line 37 
37  #include <cairo.h>  #include <cairo.h>
38    
39  #include "osm-gps-map.h"  #include "osm-gps-map.h"
40    #include "osm-gps-map-osd-classic.h"
41    
42  //the osd controls  //the osd controls
43  typedef struct {  typedef struct {
44      GdkPixmap *backup;      /* the offscreen representation of the OSD */
     gint backup_x, backup_y;  
   
45      cairo_surface_t *overlay;      cairo_surface_t *overlay;
46    
47      OsmGpsMapOsdGpsCallback cb;  #ifdef OSD_SCALE
48      gpointer data;      cairo_surface_t *scale;
49  } osd_priv_t;  #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;  
50    
51    #ifdef OSD_SOURCE_SEL
52        /* values to handle the "source" menu */
53        cairo_surface_t *map_source;
54        gboolean expanded;
55        gint shift, dir, count;
56        gint handler_id;
57        gint width, height;
58    #endif
59    
60      g_free(priv);  } osd_priv_t;
 }  
61    
62  /* position and extent of bounding box */  /* position and extent of bounding box */
63    #ifndef OSD_X
64  #define OSD_X      (10)  #define OSD_X      (10)
65  #define OSD_Y      (10)  #endif
66    
67  #define OSD_COLOR            0.5, 0.5, 1  #ifndef OSD_Y
68  #define OSD_COLOR_DISABLED   0.8, 0.8, 0.8  #define OSD_Y      (10)
69    #endif
70    
71  /* parameters of the direction shape */  /* parameters of the direction shape */
72  #ifndef OSM_GPS_MAP_OSD_DIAMETER  #ifndef OSD_DIAMETER
73  #define D_RAD  (30)         // diameter of dpad  #define D_RAD  (30)         // diameter of dpad
74  #else  #else
75  #define D_RAD  (OSM_GPS_MAP_OSD_DIAMETER)  #define D_RAD  (OSD_DIAMETER)
76  #endif  #endif
77  #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
78  #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 82  osm_gps_map_osd_free(gpointer priv_ptr)
82  #define Z_STEP   (D_RAD/4)  // distance between dpad and zoom  #define Z_STEP   (D_RAD/4)  // distance between dpad and zoom
83  #define Z_RAD    (D_RAD/2)  // radius of "caps" of zoom bar  #define Z_RAD    (D_RAD/2)  // radius of "caps" of zoom bar
84    
85    #ifdef OSD_SHADOW_ENABLE
86  /* shadow also depends on control size */  /* shadow also depends on control size */
87  #define OSD_SHADOW (D_RAD/6)  #define OSD_SHADOW (D_RAD/6)
88    #else
89    #define OSD_SHADOW (0)
90    #endif
91    
92    /* normally the GPS button is in the center of the dpad. if there's */
93    /* no dpad it will go into the zoom area */
94    #if defined(OSD_GPS_BUTTON) && defined(OSD_NO_DPAD)
95    #define Z_GPS  1
96    #else
97    #define Z_GPS  0
98    #endif
99    
100  /* total width and height of controls incl. shadow */  /* total width and height of controls incl. shadow */
101  #define OSD_W    (2*D_RAD + OSD_SHADOW)  #define OSD_W    (2*D_RAD + OSD_SHADOW + Z_GPS * 2 * Z_RAD)
102    #if !Z_GPS
103  #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)
104    #else
105    #define OSD_H    (2*Z_RAD + OSD_SHADOW)
106    #endif
107    
108    #ifdef OSD_SHADOW_ENABLE
109  #define OSD_LBL_SHADOW (OSD_SHADOW/2)  #define OSD_LBL_SHADOW (OSD_SHADOW/2)
110    #endif
111    
112    #define Z_TOP    ((1-Z_GPS) * (2 * D_RAD + Z_STEP))
113    
 #define Z_TOP    (2 * D_RAD + Z_STEP)  
114  #define Z_MID    (Z_TOP + Z_RAD)  #define Z_MID    (Z_TOP + Z_RAD)
115  #define Z_BOT    (Z_MID + Z_RAD)  #define Z_BOT    (Z_MID + Z_RAD)
116  #define Z_LEFT   (Z_RAD)  #define Z_LEFT   (Z_RAD)
117  #define Z_RIGHT  (2 * D_RAD - Z_RAD)  #define Z_RIGHT  (2 * D_RAD - Z_RAD + Z_GPS * 2 * Z_RAD)
118    #define Z_CENTER ((Z_RIGHT + Z_LEFT)/2)
119    
120  /* create the cairo shape used for the zoom buttons */  /* create the cairo shape used for the zoom buttons */
121  static void  static void
122  osm_gps_map_osd_zoom_shape(cairo_t *cr, gint x, gint y)  osd_zoom_shape(cairo_t *cr, gint x, gint y)
123  {  {
124      cairo_move_to (cr, x+Z_LEFT,    y+Z_TOP);      cairo_move_to (cr, x+Z_LEFT,    y+Z_TOP);
125      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 128  osm_gps_map_osd_zoom_shape(cairo_t *cr,
128      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);
129  }  }
130    
131    /* ------------------- color/shadow functions ----------------- */
132    
133    #ifndef OSD_COLOR
134    /* if no color has been specified we just use the gdks default colors */
135    static void
136    osd_labels(cairo_t *cr, gint width, gboolean enabled,
137                           GdkColor *fg, GdkColor *disabled) {
138        if(enabled)  gdk_cairo_set_source_color(cr, fg);
139        else         gdk_cairo_set_source_color(cr, disabled);
140        cairo_set_line_width (cr, width);
141    }
142    #else
143    static void
144    osd_labels(cairo_t *cr, gint width, gboolean enabled) {
145        if(enabled)  cairo_set_source_rgb (cr, OSD_COLOR);
146        else         cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);
147        cairo_set_line_width (cr, width);
148    }
149    #endif
150    
151    #ifdef OSD_SHADOW_ENABLE
152    static void
153    osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {
154        cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);
155        cairo_set_line_width (cr, width);
156    }
157    #endif
158    
159    #ifndef OSD_NO_DPAD
160  /* create the cairo shape used for the dpad */  /* create the cairo shape used for the dpad */
161  static void  static void
162  osm_gps_map_osd_dpad_shape(cairo_t *cr, gint x, gint y)  osd_dpad_shape(cairo_t *cr, gint x, gint y)
163  {  {
164      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);
165  }  }
166    #endif
167    
168    #ifdef OSD_SHADOW_ENABLE
169    static void
170    osd_shape_shadow(cairo_t *cr) {
171        cairo_set_source_rgba (cr, 0, 0, 0, 0.2);
172        cairo_fill (cr);
173        cairo_stroke (cr);
174    }
175    #endif
176    
177    #ifndef OSD_COLOR
178    /* if no color has been specified we just use the gdks default colors */
179    static void
180    osd_shape(cairo_t *cr, GdkColor *bg, GdkColor *fg) {
181        gdk_cairo_set_source_color(cr, bg);
182        cairo_fill_preserve (cr);
183        gdk_cairo_set_source_color(cr, fg);
184        cairo_set_line_width (cr, 1);
185        cairo_stroke (cr);
186    }
187    #else
188    static void
189    osd_shape(cairo_t *cr) {
190        cairo_set_source_rgb (cr, OSD_COLOR_BG);
191        cairo_fill_preserve (cr);
192        cairo_set_source_rgb (cr, OSD_COLOR);
193        cairo_set_line_width (cr, 1);
194        cairo_stroke (cr);
195    }
196    #endif
197    
198    
199  static gboolean  static gboolean
200  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 202  osm_gps_map_in_circle(gint x, gint y, gi
202      return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);      return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);
203  }  }
204    
205    #ifndef OSD_NO_DPAD
206  /* check whether x/y is within the dpad */  /* check whether x/y is within the dpad */
207  static osd_button_t  static osd_button_t
208  osm_gps_map_osd_check_dpad(gint x, gint y)  osd_check_dpad(gint x, gint y)
209  {  {
210      /* within entire dpad circle */      /* within entire dpad circle */
211      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))
212      {      {
213          /* convert into position relative to dpads centre */          /* convert into position relative to dpads centre */
214          x -= (OSD_X + D_RAD);          x -= D_RAD;
215          y -= (OSD_Y + D_RAD);          y -= D_RAD;
216    
217    #ifdef OSD_GPS_BUTTON
218          /* check for dpad center goes here! */          /* check for dpad center goes here! */
219          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))
220              return OSD_GPS;              return OSD_GPS;
221    #endif
222    
223          if( y < 0 && abs(x) < abs(y))          if( y < 0 && abs(x) < abs(y))
224              return OSD_UP;              return OSD_UP;
# Line 173  osm_gps_map_osd_check_dpad(gint x, gint Line 236  osm_gps_map_osd_check_dpad(gint x, gint
236      }      }
237      return OSD_NONE;      return OSD_NONE;
238  }  }
239    #endif
240    
241  /* check whether x/y is within the zoom pads */  /* check whether x/y is within the zoom pads */
242  static osd_button_t  static osd_button_t
243  osm_gps_map_osd_check_zoom(gint x, gint y) {  osd_check_zoom(gint x, gint y) {
244      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) {
245    
246          /* within circle around (-) label */          /* within circle around (-) label */
247          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)  
248              return OSD_OUT;              return OSD_OUT;
249    
250          /* within circle around (+) label */          /* within circle around (+) label */
251          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))
252              return OSD_IN;              return OSD_IN;
253    
254    #if Z_GPS == 1
255            /* within square around center */
256            if( x > Z_CENTER - Z_RAD && x < Z_CENTER + Z_RAD)
257                return OSD_GPS;
258    #endif
259    
260            /* between center of (-) button and center of entire zoom control area */
261            if(x > OSD_LEFT && x < D_RAD)
262                return OSD_OUT;
263    
264          /* between center of (+) button and center of entire zoom control area */          /* between center of (+) button and center of entire zoom control area */
265          if(x < OSD_RIGHT && x > OSD_X + D_RAD)          if(x < OSD_RIGHT && x > D_RAD)
266              return OSD_IN;              return OSD_IN;
267      }      }
268    
269      return OSD_NONE;      return OSD_NONE;
270  }  }
271    
272    #ifdef OSD_SOURCE_SEL
273    
274    /* place source selection at right border */
275    #define OSD_S_RAD (Z_RAD)
276    #define OSD_S_X   (-OSD_X)
277    #define OSD_S_Y   (OSD_Y)
278    #define OSD_S_PW  (2 * Z_RAD)
279    #define OSD_S_W   (OSD_S_PW)
280    #define OSD_S_PH  (2 * Z_RAD)
281    #define OSD_S_H   (OSD_S_PH + OSD_SHADOW)
282    
283    /* size of usable area when expanded */
284    #define OSD_S_AREA_W (priv->width)
285    #define OSD_S_AREA_H (priv->height)
286    #define OSD_S_EXP_W  (OSD_S_PW + OSD_S_AREA_W + OSD_SHADOW)
287    #define OSD_S_EXP_H  (OSD_S_AREA_H + OSD_SHADOW)
288    
289    /* internal value to draw the arrow on the "puller" */
290    #define OSD_S_D0  (OSD_S_RAD/2)
291    #ifndef OSD_FONT_SIZE
292    #define OSD_FONT_SIZE 16.0
293    #endif
294    #define OSD_TEXT_BORDER   (OSD_FONT_SIZE/2)
295    #define OSD_TEXT_SKIP     (OSD_FONT_SIZE/8)
296    
297    /* draw the shape of the source selection OSD, either only the puller (not expanded) */
298    /* or the entire menu incl. the puller (expanded) */
299    static void
300    osd_source_shape(osd_priv_t *priv, cairo_t *cr, gint x, gint y) {
301        if(!priv->expanded) {
302            /* just draw the puller */
303            cairo_move_to (cr, x + OSD_S_PW, y + OSD_S_PH);
304            cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
305            cairo_line_to (cr, x + OSD_S_PW, y);
306        } else {
307            /* draw the puller and the area itself */
308            cairo_move_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y + OSD_S_AREA_H);
309            cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H);
310            if(OSD_S_Y > 0) {
311                cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_PH);
312                cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
313            } else {
314                cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_AREA_H-OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
315                cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H - OSD_S_PH);
316                cairo_line_to (cr, x + OSD_S_PW, y);
317            }
318            cairo_line_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y);
319            cairo_close_path (cr);
320        }
321    }
322    
323    static void
324    osd_source_content(osm_gps_map_osd_t *osd, cairo_t *cr, gint offset) {
325        osd_priv_t *priv = (osd_priv_t*)osd->priv;
326    
327        int py = offset + OSD_S_RAD - OSD_S_D0;
328    
329        if(!priv->expanded) {
330            /* draw the "puller" open (<) arrow */
331            cairo_move_to (cr, offset + OSD_S_RAD + OSD_S_D0/2, py);
332            cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
333            cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
334        } else {
335            if(OSD_S_Y < 0)
336                py += OSD_S_AREA_H - OSD_S_PH;
337    
338            /* draw the "puller" close (>) arrow */
339            cairo_move_to (cr, offset + OSD_S_RAD - OSD_S_D0/2, py);
340            cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
341            cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
342            cairo_stroke(cr);
343    
344            /* don't draw a shadow for the text content */
345            if(offset == 1) {
346                gint source;
347                g_object_get(osd->widget, "map-source", &source, NULL);
348    
349                cairo_select_font_face (cr, "Sans",
350                                        CAIRO_FONT_SLANT_NORMAL,
351                                        CAIRO_FONT_WEIGHT_BOLD);
352                cairo_set_font_size (cr, OSD_FONT_SIZE);
353    
354                int i, step = (priv->height - 2*OSD_TEXT_BORDER) /
355                    OSM_GPS_MAP_SOURCE_LAST;
356                for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
357                    cairo_text_extents_t extents;
358                    const char *src = osm_gps_map_source_get_friendly_name(i);
359                    cairo_text_extents (cr, src, &extents);
360    
361                    int x = offset + OSD_S_PW + OSD_TEXT_BORDER;
362                    int y = offset + step * (i-1) + OSD_TEXT_BORDER;
363    
364                    /* draw filled rectangle if selected */
365                    if(source == i) {
366                        cairo_rectangle(cr, x - OSD_TEXT_BORDER/2,
367                                        y - OSD_TEXT_SKIP,
368                                        priv->width - OSD_TEXT_BORDER,
369                                        step + OSD_TEXT_SKIP);
370                        cairo_fill(cr);
371    
372                        /* temprarily draw with background color */
373    #ifndef OSD_COLOR
374                        GdkColor bg = osd->widget->style->bg[GTK_STATE_NORMAL];
375                        gdk_cairo_set_source_color(cr, &bg);
376    #else
377                        cairo_set_source_rgb (cr, OSD_COLOR_BG);
378    #endif
379                    }
380    
381                    cairo_move_to (cr, x, y + OSD_TEXT_SKIP - extents.y_bearing);
382                    cairo_show_text (cr, src);
383    
384                    /* restore color */
385                    if(source == i) {
386    #ifndef OSD_COLOR
387                        GdkColor fg = osd->widget->style->fg[GTK_STATE_NORMAL];
388                        gdk_cairo_set_source_color(cr, &fg);
389    #else
390                        cairo_set_source_rgb (cr, OSD_COLOR);
391    #endif
392                    }
393                }
394            }
395        }
396    }
397    
398    static void
399    osd_render_source_sel(osm_gps_map_osd_t *osd) {
400        osd_priv_t *priv = (osd_priv_t*)osd->priv;
401    
402    #ifndef OSD_COLOR
403        GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
404        GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
405        GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
406    #endif
407    
408        /* draw source selector */
409        cairo_t *cr = cairo_create(priv->map_source);
410        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
411        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
412        cairo_paint(cr);
413        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
414    
415    #ifdef OSD_SHADOW_ENABLE
416        osd_source_shape(priv, cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
417        osd_shape_shadow(cr);
418    #endif
419    
420        osd_source_shape(priv, cr, 1, 1);
421    #ifndef OSD_COLOR
422        osd_shape(cr, &bg, &fg);
423    #else
424        osd_shape(cr);
425    #endif
426    
427    #ifdef OSD_SHADOW_ENABLE
428        osd_labels_shadow(cr, Z_RAD/3, TRUE);
429        osd_source_content(osd, cr, 1+OSD_LBL_SHADOW);
430        cairo_stroke (cr);
431    #endif
432    #ifndef OSD_COLOR
433        osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
434    #else
435        osd_labels(cr, Z_RAD/3, TRUE);
436    #endif
437        osd_source_content(osd, cr, 1);
438        cairo_stroke (cr);
439    
440        cairo_destroy(cr);
441    }
442    
443    /* re-allocate the buffer used to draw the menu. This is used */
444    /* to collapse/expand the buffer */
445    static void
446    osd_source_reallocate(osm_gps_map_osd_t *osd) {
447        osd_priv_t *priv = (osd_priv_t*)osd->priv;
448    
449        /* re-allocate offscreen bitmap */
450        g_assert (priv->map_source);
451    
452        int w = OSD_S_W, h = OSD_S_H;
453        if(priv->expanded) {
454            /* ... and right of it the waypoint id */
455            cairo_text_extents_t extents;
456    
457            /* determine content size */
458            cairo_t *cr = cairo_create(priv->map_source);
459            cairo_select_font_face (cr, "Sans",
460                                    CAIRO_FONT_SLANT_NORMAL,
461                                    CAIRO_FONT_WEIGHT_BOLD);
462            cairo_set_font_size (cr, OSD_FONT_SIZE);
463    
464            /* calculate menu size */
465            int i, max_h = 0, max_w = 0;
466            for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
467                const char *src = osm_gps_map_source_get_friendly_name(i);
468                cairo_text_extents (cr, src, &extents);
469    
470                if(extents.width > max_w) max_w = extents.width;
471                if(extents.height > max_h) max_h = extents.height;
472            }
473            cairo_destroy(cr);
474    
475            priv->width  = max_w + 2*OSD_TEXT_BORDER;
476            priv->height = OSM_GPS_MAP_SOURCE_LAST *
477                (max_h + 2*OSD_TEXT_SKIP) + 2*OSD_TEXT_BORDER;
478    
479            w = OSD_S_EXP_W;
480            h = OSD_S_EXP_H;
481        }
482    
483        cairo_surface_destroy(priv->map_source);
484        priv->map_source =
485            cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w+2, h+2);
486    
487        osd_render_source_sel(osd);
488    }
489    
490    #define OSD_HZ      15
491    #define OSD_TIME    500
492    
493    static gboolean osd_source_animate(gpointer data) {
494        osm_gps_map_osd_t *osd = (osm_gps_map_osd_t*)data;
495        osd_priv_t *priv = (osd_priv_t*)osd->priv;
496        int diff = OSD_S_EXP_W - OSD_S_W - OSD_S_X;
497        gboolean done = FALSE;
498        priv->count += priv->dir;
499    
500        /* shifting in */
501        if(priv->dir < 0) {
502            if(priv->count <= 0) {
503                priv->count = 0;
504                done = TRUE;
505            }
506        } else {
507            if(priv->count >= 1000) {
508                priv->expanded = FALSE;
509                osd_source_reallocate(osd);
510    
511                priv->count = 1000;
512                done = TRUE;
513            }
514        }
515    
516    
517        /* count runs linearly from 0 to 1000, map this nicely onto a position */
518    
519        /* nicer sinoid mapping */
520        float m = 0.5-cos(priv->count * M_PI / 1000.0)/2;
521        priv->shift = (osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X) +
522            m * diff;
523    
524        osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
525    
526        if(done)
527            priv->handler_id = 0;
528    
529        return !done;
530    }
531    
532    /* switch between expand and collapse mode of source selection */
533    static void
534    osd_source_toggle(osm_gps_map_osd_t *osd)
535    {
536        osd_priv_t *priv = (osd_priv_t*)osd->priv;
537    
538        /* ignore clicks while animation is running */
539        if(priv->handler_id)
540            return;
541    
542        /* expand immediately, collapse is handle at the end of the collapse animation */
543        if(!priv->expanded) {
544            priv->expanded = TRUE;
545            osd_source_reallocate(osd);
546    
547            priv->count = 1000;
548            priv->shift = osd->widget->allocation.width - OSD_S_W;
549            priv->dir = -1000/OSD_HZ;
550        } else {
551            priv->count =  0;
552            priv->shift = osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
553            priv->dir = +1000/OSD_HZ;
554        }
555    
556        priv->handler_id = gtk_timeout_add(OSD_TIME/OSD_HZ, osd_source_animate, osd);
557    }
558    
559    /* check if the user clicked inside the source selection area */
560    static osd_button_t
561    osd_source_check(osm_gps_map_osd_t *osd, gint x, gint y) {
562        osd_priv_t *priv = (osd_priv_t*)osd->priv;
563    
564        if(!priv->expanded)
565            x -= osd->widget->allocation.width - OSD_S_W;
566        else
567            x -= osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
568    
569        if(OSD_S_Y > 0)
570            y -= OSD_S_Y;
571        else
572            y -= osd->widget->allocation.height - OSD_S_PH + OSD_S_Y;
573    
574        /* within square around puller? */
575        if(y > 0 && y < OSD_S_PH && x > 0 && x < OSD_S_PW) {
576            /* really within puller shape? */
577            if(x > Z_RAD || osm_gps_map_in_circle(x, y, Z_RAD, Z_RAD, Z_RAD)) {
578                /* expand source selector */
579                osd_source_toggle(osd);
580    
581                /* tell upper layers that user clicked some background element */
582                /* of the OSD */
583                return OSD_BG;
584            }
585        }
586    
587        /* check for clicks into data area */
588        if(priv->expanded && !priv->handler_id) {
589            /* re-adjust from puller top to content top */
590            if(OSD_S_Y < 0)
591                y += OSD_S_EXP_H - OSD_S_PH;
592    
593            if(x > OSD_S_PW &&
594               x < OSD_S_PW + OSD_S_EXP_W &&
595               y > 0 &&
596               y < OSD_S_EXP_H) {
597    
598                int step = (priv->height - 2*OSD_TEXT_BORDER)
599                    / OSM_GPS_MAP_SOURCE_LAST;
600    
601                y -= OSD_TEXT_BORDER - OSD_TEXT_SKIP;
602                y /= step;
603                y += 1;
604    
605                gint old = 0;
606                g_object_get(osd->widget, "map-source", &old, NULL);
607    
608                if(y > OSM_GPS_MAP_SOURCE_NULL &&
609                   y <= OSM_GPS_MAP_SOURCE_LAST &&
610                   old != y) {
611                    g_object_set(osd->widget, "map-source", y, NULL);
612    
613                    osd_render_source_sel(osd);
614                    osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
615                }
616    
617                /* return "clicked in OSD background" to prevent further */
618                /* processing by application */
619                return OSD_BG;
620            }
621        }
622    
623        return OSD_NONE;
624    }
625    #endif // OSD_SOURCE_SEL
626    
627  static osd_button_t  static osd_button_t
628  osm_gps_map_osd_check(gint x, gint y) {  osd_check(osm_gps_map_osd_t *osd, gint x, gint y) {
629      osd_button_t but = OSD_NONE;      osd_button_t but = OSD_NONE;
630    
631    #ifdef OSD_SOURCE_SEL
632        /* the source selection area is handles internally */
633        but = osd_source_check(osd, x, y);
634        if(but != OSD_NONE)
635            return but;
636    #endif
637    
638        x -= OSD_X;
639        y -= OSD_Y;
640    
641        if(OSD_X < 0)
642            x -= (osd->widget->allocation.width - OSD_W);
643    
644        if(OSD_Y < 0)
645            y -= (osd->widget->allocation.height - OSD_H);
646    
647      /* first do a rough test for the OSD area. */      /* first do a rough test for the OSD area. */
648      /* this is just to avoid an unnecessary detailed test */      /* this is just to avoid an unnecessary detailed test */
649      if(x > OSD_X && x < OSD_X + OSD_W &&      if(x > 0 && x < OSD_W && y > 0 && y < OSD_H) {
650         y > OSD_Y && y < OSD_Y + OSD_H) {  #ifndef OSD_NO_DPAD
651          but = osm_gps_map_osd_check_dpad(x, y);          but = osd_check_dpad(x, y);
652    #endif
653    
654          if(but == OSD_NONE)          if(but == OSD_NONE)
655              but = osm_gps_map_osd_check_zoom(x, y);              but = osd_check_zoom(x, y);
656      }      }
657    
658      return but;      return but;
659  }  }
660    
661  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);  
 }  
   
662  static void  static void
663  osm_gps_map_osd_dpad_labels(cairo_t *cr, gint x, gint y) {  osd_dpad_labels(cairo_t *cr, gint x, gint y) {
664      /* move reference to dpad center */      /* move reference to dpad center */
665      x += D_RAD;      x += D_RAD;
666      y += D_RAD;      y += D_RAD;
# Line 256  osm_gps_map_osd_dpad_labels(cairo_t *cr, Line 683  osm_gps_map_osd_dpad_labels(cairo_t *cr,
683          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]);
684      }      }
685  }  }
686    #endif
687    
688  /* draw the sattelite dish icon in the center of the dpad */  #ifdef OSD_GPS_BUTTON
689  #define GPS_V0  (D_RAD/8)  /* draw the satellite dish icon in the center of the dpad */
690    #define GPS_V0  (D_RAD/7)
691  #define GPS_V1  (D_RAD/10)  #define GPS_V1  (D_RAD/10)
692  #define GPS_V2  (D_RAD/5)  #define GPS_V2  (D_RAD/5)
693    
694  /* draw a satellite receiver dish */  /* draw a satellite receiver dish */
695    /* this is either drawn in the center of the dpad (if present) */
696    /* or in the middle of the zoom area */
697  static void  static void
698  osm_gps_map_osd_dpad_gps(cairo_t *cr, gint x, gint y) {  osd_dpad_gps(cairo_t *cr, gint x, gint y) {
699      /* move reference to dpad center */      /* move reference to dpad center */
700      x += D_RAD;      x += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD * 3;
701      y += D_RAD + GPS_V0;      y += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD + GPS_V0;
702    
703      cairo_move_to (cr, x-GPS_V0, y+GPS_V0);      cairo_move_to (cr, x-GPS_V0, y+GPS_V0);
704      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 713  osm_gps_map_osd_dpad_gps(cairo_t *cr, gi
713      cairo_move_to (cr, x, y-GPS_V2);      cairo_move_to (cr, x, y-GPS_V2);
714      cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);      cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);
715  }  }
716    #endif
717    
718  #define Z_LEN  (2*Z_RAD/3)  #define Z_LEN  (2*Z_RAD/3)
719    
720  static void  static void
721  osm_gps_map_osd_zoom_labels(cairo_t *cr, gint x, gint y) {  osd_zoom_labels(cairo_t *cr, gint x, gint y) {
722      cairo_move_to (cr, x + Z_LEFT  - Z_LEN, y + Z_MID);      cairo_move_to (cr, x + Z_LEFT  - Z_LEN, y + Z_MID);
723      cairo_line_to (cr, x + Z_LEFT  + Z_LEN, y + Z_MID);      cairo_line_to (cr, x + Z_LEFT  + Z_LEN, y + Z_MID);
724    
# Line 296  osm_gps_map_osd_zoom_labels(cairo_t *cr, Line 728  osm_gps_map_osd_zoom_labels(cairo_t *cr,
728      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);
729  }  }
730    
731  static void  static char *
732  osm_gps_map_osd_labels(cairo_t *cr, gint width, gboolean enabled) {  dist_str_metric(int dist)
733      if(enabled)  cairo_set_source_rgb (cr, OSD_COLOR);  {
734      else         cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);      if(dist<1000)
735      cairo_set_line_width (cr, width);          return g_strdup_printf("%u m",  dist);
736      cairo_stroke (cr);  
737        return g_strdup_printf("%u km", dist/1000);
738  }  }
739    
740  static void  static void
741  osm_gps_map_osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {  osd_render_scale(osm_gps_map_osd_t *osd)
742      cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);  {
743      cairo_set_line_width (cr, width);      osd_priv_t *priv = (osd_priv_t*)osd->priv;
744      cairo_stroke (cr);      float m_per_pix = osm_gps_map_get_scale(OSM_GPS_MAP(osd->widget));
745    
746        /* first fill with transparency */
747        cairo_t *cr = cairo_create(priv->scale);
748        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
749        //    cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
750        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2);
751        cairo_paint(cr);
752        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
753    
754        /* determine the size of the scale width in meters */
755        float width = (OSD_SCALE_W-2) * m_per_pix;
756        printf("width = %f meters\n", width);
757    
758        /* scale this to useful values */
759        int exp = logf(width)*M_LOG10E;
760        int mant = width/pow(10,exp);
761        printf("mant = %d, exp = %d \n", mant, exp);
762    
763        int width_metric = mant * pow(10,exp);
764        char *dist_str = dist_str_metric(width_metric);
765        width_metric /= m_per_pix;
766        printf("metric scale width = %d pixels: %s\n", width_metric, dist_str);
767    
768        int font_size = 12;
769    
770        cairo_select_font_face (cr, "Sans",
771                                CAIRO_FONT_SLANT_NORMAL,
772                                CAIRO_FONT_WEIGHT_BOLD);
773        cairo_set_font_size (cr, font_size);
774        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
775    
776        cairo_text_extents_t extents;
777        cairo_text_extents (cr, dist_str, &extents);
778    
779        cairo_move_to (cr, font_size/3, font_size);
780        cairo_show_text (cr, dist_str);
781    
782        printf("height = %f, bearing = %f\n",  extents.height, extents.y_bearing);
783    
784        /* draw white line */
785        cairo_set_line_cap  (cr, CAIRO_LINE_CAP_ROUND);
786        cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);
787        cairo_set_line_width (cr, 3);
788        cairo_move_to (cr, 2, 2*font_size/3);
789        cairo_rel_line_to (cr, 0,  2*font_size/3);
790        cairo_rel_line_to (cr, width_metric, 0);
791        cairo_rel_line_to (cr, 0, -2*font_size/3);
792        cairo_stroke(cr);
793    
794        /* draw black line */
795        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
796        cairo_set_line_width (cr, 2);
797        cairo_move_to (cr, 2, 2*font_size/3);
798        cairo_rel_line_to (cr, 0,  2*font_size/3);
799        cairo_rel_line_to (cr, width_metric, 0);
800        cairo_rel_line_to (cr, 0, -2*font_size/3);
801        cairo_stroke(cr);
802    
803        /* xyz */
804    
805        cairo_destroy(cr);
806  }  }
807    
808  static void  static void
809  osm_gps_map_osd_render(OsmGpsMapPrivate *priv) {  osd_render(osm_gps_map_osd_t *osd)
810    {
811        osd_priv_t *priv = (osd_priv_t*)osd->priv;
812    
813    #ifndef OSD_COLOR
814        GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
815        GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
816        GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
817    #endif
818    
819      /* first fill with transparency */      /* first fill with transparency */
820      cairo_t *cr = cairo_create(priv->osd.overlay);      cairo_t *cr = cairo_create(priv->overlay);
821      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
822      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);
823      cairo_paint(cr);      cairo_paint(cr);
   
824      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
825    
826      /* --------- draw zoom and dpad shape shadow ----------- */      /* --------- draw zoom and dpad shape shadow ----------- */
827      gint x = 0, y = 0;  #ifdef OSD_SHADOW_ENABLE
828        osd_zoom_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
829      osm_gps_map_osd_zoom_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);      osd_shape_shadow(cr);
830      osm_gps_map_osd_shape_shadow(cr);  #ifndef OSD_NO_DPAD
831      osm_gps_map_osd_dpad_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);      osd_dpad_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
832      osm_gps_map_osd_shape_shadow(cr);      osd_shape_shadow(cr);
833    #endif
834    #endif
835    
836      /* --------- draw zoom and dpad shape ----------- */      /* --------- draw zoom and dpad shape ----------- */
837    
838      osm_gps_map_osd_zoom_shape(cr, x, y);      osd_zoom_shape(cr, 1, 1);
839      osm_gps_map_osd_shape(cr);  #ifndef OSD_COLOR
840      osm_gps_map_osd_dpad_shape(cr, x, y);      osd_shape(cr, &bg, &fg);
841      osm_gps_map_osd_shape(cr);  #else
842        osd_shape(cr);
843    #endif
844    #ifndef OSD_NO_DPAD
845        osd_dpad_shape(cr, 1, 1);
846    #ifndef OSD_COLOR
847        osd_shape(cr, &bg, &fg);
848    #else
849        osd_shape(cr);
850    #endif
851    #endif
852    
853      /* --------- draw zoom and dpad labels --------- */      /* --------- draw zoom and dpad labels --------- */
854    
855      osm_gps_map_osd_zoom_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);  #ifdef OSD_SHADOW_ENABLE
856      osm_gps_map_osd_dpad_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);      osd_labels_shadow(cr, Z_RAD/3, TRUE);
857      osm_gps_map_osd_labels_shadow(cr, Z_RAD/3, TRUE);      osd_zoom_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
858      osm_gps_map_osd_dpad_gps(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);  #ifndef OSD_NO_DPAD
859      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);
860    #endif
861      osm_gps_map_osd_zoom_labels(cr, x, y);      cairo_stroke(cr);
862      osm_gps_map_osd_dpad_labels(cr, x, y);  #ifdef OSD_GPS_BUTTON
863      osm_gps_map_osd_labels(cr, Z_RAD/3, TRUE);      osd_labels_shadow(cr, Z_RAD/6, osd->cb != NULL);
864      osm_gps_map_osd_dpad_gps(cr, x, y);      osd_dpad_gps(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
865      osm_gps_map_osd_labels(cr, Z_RAD/6, priv->osd.cb != NULL);      cairo_stroke(cr);
866    #endif
867    #endif
868    
869    #ifndef OSD_COLOR
870        osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
871    #else
872        osd_labels(cr, Z_RAD/3, TRUE);
873    #endif
874        osd_zoom_labels(cr, 1, 1);
875    #ifndef OSD_NO_DPAD
876        osd_dpad_labels(cr, 1, 1);
877    #endif
878        cairo_stroke(cr);
879    
880    #ifndef OSD_COLOR
881        osd_labels(cr, Z_RAD/6, osd->cb != NULL, &fg, &da);
882    #else
883        osd_labels(cr, Z_RAD/6, osd->cb != NULL);
884    #endif
885    #ifdef OSD_GPS_BUTTON
886        osd_dpad_gps(cr, 1, 1);
887    #endif
888        cairo_stroke(cr);
889    
890      cairo_destroy(cr);      cairo_destroy(cr);
891    
892    #ifdef OSD_SOURCE_SEL
893        osd_render_source_sel(osd);
894    #endif
895    
896    #ifdef OSD_SCALE
897        osd_render_scale(osd);
898    #endif
899  }  }
900    
901  static void  static void
902  osm_gps_map_osd_draw_controls (OsmGpsMap *map, gint xoffset, gint yoffset)  osd_draw(osm_gps_map_osd_t *osd, GdkDrawable *drawable)
903  {  {
904      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;  
905    
906      /* OSD itself uses some off-screen rendering, so check if the */      /* OSD itself uses some off-screen rendering, so check if the */
907      /* offscreen buffer is present and create it if not */      /* offscreen buffer is present and create it if not */
908      if(!priv->osd.overlay) {      if(!priv->overlay) {
909          /* create overlay ... */          /* create overlay ... */
910          priv->osd.overlay =          priv->overlay =
911              cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W, OSD_H);              cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W+2, OSD_H+2);
912    
913    #ifdef OSD_SOURCE_SEL
914            /* the initial OSD state is alway not-expanded */
915            priv->map_source =
916                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
917                                               OSD_S_W+2, OSD_S_H+2);
918    #endif
919    
920    #ifdef OSD_SCALE
921            priv->scale =
922                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
923                                           OSD_SCALE_W+2, OSD_SCALE_H+2);
924    #endif
925    
926          /* ... and render it */          /* ... and render it */
927          osm_gps_map_osd_render(priv);          osd_render(osd);
928      }      }
929    
930      // now draw this onto the original context      // now draw this onto the original context
931      cairo_t *cr = gdk_cairo_create(priv->pixmap);      cairo_t *cr = gdk_cairo_create(drawable);
932      cairo_set_source_surface(cr, priv->osd.overlay, x, y);  
933        int x = OSD_X, y = OSD_Y;
934        if(OSD_X < 0)
935            x = osd->widget->allocation.width - OSD_W + OSD_X;
936    
937        if(OSD_Y < 0)
938            y = osd->widget->allocation.height - OSD_H + OSD_Y;
939    
940        cairo_set_source_surface(cr, priv->overlay, x, y);
941        cairo_paint(cr);
942    
943    #ifdef OSD_SOURCE_SEL
944        if(!priv->handler_id) {
945            /* the OSD source selection is not being animated */
946            if(!priv->expanded)
947                x = osd->widget->allocation.width - OSD_S_W;
948            else
949                x = osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
950        } else
951            x = priv->shift;
952    
953        y = OSD_S_Y;
954        if(OSD_S_Y < 0) {
955            if(!priv->expanded)
956                y = osd->widget->allocation.height - OSD_S_H + OSD_S_Y;
957            else
958                y = osd->widget->allocation.height - OSD_S_EXP_H + OSD_S_Y;
959        }
960    
961        cairo_set_source_surface(cr, priv->map_source, x, y);
962      cairo_paint(cr);      cairo_paint(cr);
963    #endif
964    
965    #ifdef OSD_SCALE
966        x =  OSD_X;
967        y = -OSD_Y;
968        if(x < 0) x += osd->widget->allocation.width - OSD_SCALE_W;
969        if(y < 0) y += osd->widget->allocation.height - OSD_SCALE_H;
970    
971        cairo_set_source_surface(cr, priv->scale, x, y);
972        cairo_paint(cr);
973    #endif
974    
975      cairo_destroy(cr);      cairo_destroy(cr);
976  }  }
977    
978  static void  static void
979  osm_gps_map_osd_restore (OsmGpsMap *map)  osd_free(osm_gps_map_osd_t *osd)
980  {  {
981      OsmGpsMapPrivate *priv = map->priv;      osd_priv_t *priv = (osd_priv_t *)(osd->priv);
982    
983      /* restore backup of previous contents */      if (priv->overlay)
984      if(priv->osd.backup) {           cairo_surface_destroy(priv->overlay);
985          /* create backup of background */  
986          gdk_draw_drawable(priv->pixmap,  #ifdef OSD_SOURCE_SEL
987              GTK_WIDGET(map)->style->fg_gc[GTK_WIDGET_STATE(GTK_WIDGET(map))],      if(priv->handler_id)
988                        priv->osd.backup, 0, 0,          gtk_timeout_remove(priv->handler_id);
989                        priv->osd.backup_x, priv->osd.backup_y, OSD_W+2, OSD_H+2);  
990      }      if (priv->map_source)
991             cairo_surface_destroy(priv->map_source);
992    #endif
993    
994    #ifdef OSD_SCALE
995        if (priv->scale)
996             cairo_surface_destroy(priv->scale);
997    #endif
998    
999        g_free(priv);
1000  }  }
1001    
1002  static void  static gboolean
1003  osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdGpsCallback cb, gpointer data)  osd_busy(osm_gps_map_osd_t *osd)
1004  {  {
1005      OsmGpsMapPrivate *priv;  #ifdef OSD_SOURCE_SEL
1006        osd_priv_t *priv = (osd_priv_t *)(osd->priv);
1007        return (priv->handler_id != 0);
1008    #else
1009        return FALSE;
1010    #endif
1011    }
1012    
1013    static osm_gps_map_osd_t osd_classic = {
1014        .widget     = NULL,
1015    
1016        .draw       = osd_draw,
1017        .check      = osd_check,
1018        .render     = osd_render,
1019        .free       = osd_free,
1020        .busy       = osd_busy,
1021    
1022        .cb         = NULL,
1023        .data       = NULL,
1024    
1025        .priv       = NULL
1026    };
1027    
1028    /* this is the only function that's externally visible */
1029    void
1030    osm_gps_map_osd_classic_init(OsmGpsMap *map)
1031    {
1032        osd_priv_t *priv = osd_classic.priv = g_new0(osd_priv_t, 1);
1033    
1034        osd_classic.priv = priv;
1035    
1036        osm_gps_map_register_osd(map, &osd_classic);
1037    }
1038    
1039      g_return_if_fail (OSM_IS_GPS_MAP (map));  #ifdef OSD_GPS_BUTTON
1040      priv = map->priv;  /* below are osd specific functions which aren't used by osm-gps-map */
1041    /* but instead are to be used by the main application */
1042    void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb,
1043                                     gpointer data) {
1044        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1045        g_return_if_fail (osd);
1046    
1047      priv->osd.cb = cb;      osd->cb = cb;
1048      priv->osd.data = data;      osd->data = data;
1049    
1050      /* this may have changed the state of the gps button */      /* this may have changed the state of the gps button */
1051      /* we thus re-render the overlay */      /* we thus re-render the overlay */
1052      osm_gps_map_osd_render(priv);      osd->render(osd);
1053    
1054      osm_gps_map_map_redraw_idle(map);      osm_gps_map_redraw(map);
1055    }
1056    #endif
1057    
1058    osd_button_t
1059    osm_gps_map_osd_check(OsmGpsMap *map, gint x, gint y) {
1060        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1061        g_return_val_if_fail (osd, OSD_NONE);
1062    
1063        return osd_check(osd, x, y);
1064  }  }
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