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

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revision 75 by harbaum, Mon Aug 24 12:57:15 2009 UTC revision 111 by harbaum, Mon Sep 14 12:16:08 2009 UTC
# Line 19  Line 19 
19    
20  #include "config.h"  #include "config.h"
21  #include <stdlib.h>  // abs  #include <stdlib.h>  // abs
22  #include <math.h>    // M_PI  #include <math.h>    // M_PI/cos()
23    
24  /* parameters that can be overwritten from the config file: */  /* parameters that can be overwritten from the config file: */
25  /* OSM_GPS_MAP_OSD_DIAMETER */  /* OSD_DIAMETER */
26    /* OSD_X, OSD_Y */
27    
28  #ifndef USE_CAIRO  #ifndef USE_CAIRO
29  #error "OSD control display lacks a non-cairo implementation!"  #error "OSD control display lacks a non-cairo implementation!"
# Line 36  Line 37 
37  //the osd controls  //the osd controls
38  typedef struct {  typedef struct {
39      /* the offscreen representation of the OSD */      /* the offscreen representation of the OSD */
40      cairo_surface_t *overlay;      struct {
41            cairo_surface_t *surface;
42            gboolean rendered;
43    #ifdef OSD_GPS_BUTTON
44            gboolean gps_enabled;
45    #endif
46        } controls;
47    
48    #ifdef OSD_SCALE
49        struct {
50            cairo_surface_t *surface;
51            int zoom;
52        } scale;
53    #endif
54    
55    #ifdef OSD_CROSSHAIR
56        struct {
57            cairo_surface_t *surface;
58            gboolean rendered;
59        } crosshair;
60    #endif
61    
62      GdkColor bg, fg, da;  #ifdef OSD_COORDINATES
63        struct {
64            cairo_surface_t *surface;
65            float lat, lon;
66        } coordinates;
67    #endif
68    
69    #ifdef OSD_SOURCE_SEL
70        struct {
71            /* values to handle the "source" menu */
72            cairo_surface_t *surface;
73            gboolean expanded;
74            gint shift, dir, count;
75            gint handler_id;
76            gint width, height;
77            gboolean rendered;
78        } source_sel;
79    #endif
80    
81  } osd_priv_t;  } osd_priv_t;
82    
83  /* position and extent of bounding box */  /* position and extent of bounding box */
84    #ifndef OSD_X
85  #define OSD_X      (10)  #define OSD_X      (10)
86    #endif
87    
88    #ifndef OSD_Y
89  #define OSD_Y      (10)  #define OSD_Y      (10)
90    #endif
91    
92  /* parameters of the direction shape */  /* parameters of the direction shape */
93  #ifndef OSM_GPS_MAP_OSD_DIAMETER  #ifndef OSD_DIAMETER
94  #define D_RAD  (30)         // diameter of dpad  #define D_RAD  (30)         // diameter of dpad
95  #else  #else
96  #define D_RAD  (OSM_GPS_MAP_OSD_DIAMETER)  #define D_RAD  (OSD_DIAMETER)
97  #endif  #endif
98  #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
99  #define D_LEN  (D_RAD/4)    // length of arrow  #define D_LEN  (D_RAD/4)    // length of arrow
# Line 67  typedef struct { Line 110  typedef struct {
110  #define OSD_SHADOW (0)  #define OSD_SHADOW (0)
111  #endif  #endif
112    
113    /* normally the GPS button is in the center of the dpad. if there's */
114    /* no dpad it will go into the zoom area */
115    #if defined(OSD_GPS_BUTTON) && defined(OSD_NO_DPAD)
116    #define Z_GPS  1
117    #else
118    #define Z_GPS  0
119    #endif
120    
121  /* total width and height of controls incl. shadow */  /* total width and height of controls incl. shadow */
122  #define OSD_W    (2*D_RAD + OSD_SHADOW)  #define OSD_W    (2*D_RAD + OSD_SHADOW + Z_GPS * 2 * Z_RAD)
123    #if !Z_GPS
124  #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)
125    #else
126    #define OSD_H    (2*Z_RAD + OSD_SHADOW)
127    #endif
128    
129  #ifdef OSD_SHADOW_ENABLE  #ifdef OSD_SHADOW_ENABLE
130  #define OSD_LBL_SHADOW (OSD_SHADOW/2)  #define OSD_LBL_SHADOW (OSD_SHADOW/2)
131  #endif  #endif
132    
133  #define Z_TOP    (2 * D_RAD + Z_STEP)  #define Z_TOP    ((1-Z_GPS) * (2 * D_RAD + Z_STEP))
134    
135  #define Z_MID    (Z_TOP + Z_RAD)  #define Z_MID    (Z_TOP + Z_RAD)
136  #define Z_BOT    (Z_MID + Z_RAD)  #define Z_BOT    (Z_MID + Z_RAD)
137  #define Z_LEFT   (Z_RAD)  #define Z_LEFT   (Z_RAD)
138  #define Z_RIGHT  (2 * D_RAD - Z_RAD)  #define Z_RIGHT  (2 * D_RAD - Z_RAD + Z_GPS * 2 * Z_RAD)
139    #define Z_CENTER ((Z_RIGHT + Z_LEFT)/2)
140    
141  /* create the cairo shape used for the zoom buttons */  /* create the cairo shape used for the zoom buttons */
142  static void  static void
143  osm_gps_map_osd_zoom_shape(cairo_t *cr, gint x, gint y)  osd_zoom_shape(cairo_t *cr, gint x, gint y)
144  {  {
145      cairo_move_to (cr, x+Z_LEFT,    y+Z_TOP);      cairo_move_to (cr, x+Z_LEFT,    y+Z_TOP);
146      cairo_line_to (cr, x+Z_RIGHT,   y+Z_TOP);      cairo_line_to (cr, x+Z_RIGHT,   y+Z_TOP);
# Line 93  osm_gps_map_osd_zoom_shape(cairo_t *cr, Line 149  osm_gps_map_osd_zoom_shape(cairo_t *cr,
149      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);
150  }  }
151    
152    /* ------------------- color/shadow functions ----------------- */
153    
154    #ifndef OSD_COLOR
155    /* if no color has been specified we just use the gdks default colors */
156    static void
157    osd_labels(cairo_t *cr, gint width, gboolean enabled,
158                           GdkColor *fg, GdkColor *disabled) {
159        if(enabled)  gdk_cairo_set_source_color(cr, fg);
160        else         gdk_cairo_set_source_color(cr, disabled);
161        cairo_set_line_width (cr, width);
162    }
163    #else
164    static void
165    osd_labels(cairo_t *cr, gint width, gboolean enabled) {
166        if(enabled)  cairo_set_source_rgb (cr, OSD_COLOR);
167        else         cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);
168        cairo_set_line_width (cr, width);
169    }
170    #endif
171    
172    #ifdef OSD_SHADOW_ENABLE
173    static void
174    osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {
175        cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);
176        cairo_set_line_width (cr, width);
177    }
178    #endif
179    
180    #ifndef OSD_NO_DPAD
181  /* create the cairo shape used for the dpad */  /* create the cairo shape used for the dpad */
182  static void  static void
183  osm_gps_map_osd_dpad_shape(cairo_t *cr, gint x, gint y)  osd_dpad_shape(cairo_t *cr, gint x, gint y)
184  {  {
185      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);
186  }  }
187    #endif
188    
189    #ifdef OSD_SHADOW_ENABLE
190    static void
191    osd_shape_shadow(cairo_t *cr) {
192        cairo_set_source_rgba (cr, 0, 0, 0, 0.2);
193        cairo_fill (cr);
194        cairo_stroke (cr);
195    }
196    #endif
197    
198    #ifndef OSD_COLOR
199    /* if no color has been specified we just use the gdks default colors */
200    static void
201    osd_shape(cairo_t *cr, GdkColor *bg, GdkColor *fg) {
202        gdk_cairo_set_source_color(cr, bg);
203        cairo_fill_preserve (cr);
204        gdk_cairo_set_source_color(cr, fg);
205        cairo_set_line_width (cr, 1);
206        cairo_stroke (cr);
207    }
208    #else
209    static void
210    osd_shape(cairo_t *cr) {
211        cairo_set_source_rgb (cr, OSD_COLOR_BG);
212        cairo_fill_preserve (cr);
213        cairo_set_source_rgb (cr, OSD_COLOR);
214        cairo_set_line_width (cr, 1);
215        cairo_stroke (cr);
216    }
217    #endif
218    
219    
220  static gboolean  static gboolean
221  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 106  osm_gps_map_in_circle(gint x, gint y, gi Line 223  osm_gps_map_in_circle(gint x, gint y, gi
223      return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);      return( pow(cx - x, 2) + pow(cy - y, 2) < rad * rad);
224  }  }
225    
226    #ifndef OSD_NO_DPAD
227  /* check whether x/y is within the dpad */  /* check whether x/y is within the dpad */
228  static osd_button_t  static osd_button_t
229  osm_gps_map_osd_check_dpad(gint x, gint y)  osd_check_dpad(gint x, gint y)
230  {  {
231      /* within entire dpad circle */      /* within entire dpad circle */
232      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))
233      {      {
234          /* convert into position relative to dpads centre */          /* convert into position relative to dpads centre */
235          x -= (OSD_X + D_RAD);          x -= D_RAD;
236          y -= (OSD_Y + D_RAD);          y -= D_RAD;
237    
238    #ifdef OSD_GPS_BUTTON
239          /* check for dpad center goes here! */          /* check for dpad center goes here! */
240          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))
241              return OSD_GPS;              return OSD_GPS;
242    #endif
243    
244          if( y < 0 && abs(x) < abs(y))          if( y < 0 && abs(x) < abs(y))
245              return OSD_UP;              return OSD_UP;
# Line 137  osm_gps_map_osd_check_dpad(gint x, gint Line 257  osm_gps_map_osd_check_dpad(gint x, gint
257      }      }
258      return OSD_NONE;      return OSD_NONE;
259  }  }
260    #endif
261    
262  /* check whether x/y is within the zoom pads */  /* check whether x/y is within the zoom pads */
263  static osd_button_t  static osd_button_t
264  osm_gps_map_osd_check_zoom(gint x, gint y) {  osd_check_zoom(gint x, gint y) {
265      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) {
266    
267          /* within circle around (-) label */          /* within circle around (-) label */
268          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)  
269              return OSD_OUT;              return OSD_OUT;
270    
271          /* within circle around (+) label */          /* within circle around (+) label */
272          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))
273              return OSD_IN;              return OSD_IN;
274    
275    #if Z_GPS == 1
276            /* within square around center */
277            if( x > Z_CENTER - Z_RAD && x < Z_CENTER + Z_RAD)
278                return OSD_GPS;
279    #endif
280    
281            /* between center of (-) button and center of entire zoom control area */
282            if(x > OSD_LEFT && x < D_RAD)
283                return OSD_OUT;
284    
285          /* between center of (+) button and center of entire zoom control area */          /* between center of (+) button and center of entire zoom control area */
286          if(x < OSD_RIGHT && x > OSD_X + D_RAD)          if(x < OSD_RIGHT && x > D_RAD)
287              return OSD_IN;              return OSD_IN;
288      }      }
289    
290      return OSD_NONE;      return OSD_NONE;
291  }  }
292    
293  static osd_button_t  #ifdef OSD_SOURCE_SEL
 osm_gps_map_osd_check(gint x, gint y) {  
     osd_button_t but = OSD_NONE;  
294    
295      /* first do a rough test for the OSD area. */  /* place source selection at right border */
296      /* this is just to avoid an unnecessary detailed test */  #define OSD_S_RAD (Z_RAD)
297      if(x > OSD_X && x < OSD_X + OSD_W &&  #define OSD_S_X   (-OSD_X)
298         y > OSD_Y && y < OSD_Y + OSD_H) {  #define OSD_S_Y   (OSD_Y)
299          but = osm_gps_map_osd_check_dpad(x, y);  #define OSD_S_PW  (2 * Z_RAD)
300    #define OSD_S_W   (OSD_S_PW)
301    #define OSD_S_PH  (2 * Z_RAD)
302    #define OSD_S_H   (OSD_S_PH + OSD_SHADOW)
303    
304    /* size of usable area when expanded */
305    #define OSD_S_AREA_W (priv->source_sel.width)
306    #define OSD_S_AREA_H (priv->source_sel.height)
307    #define OSD_S_EXP_W  (OSD_S_PW + OSD_S_AREA_W + OSD_SHADOW)
308    #define OSD_S_EXP_H  (OSD_S_AREA_H + OSD_SHADOW)
309    
310    /* internal value to draw the arrow on the "puller" */
311    #define OSD_S_D0  (OSD_S_RAD/2)
312    #ifndef OSD_FONT_SIZE
313    #define OSD_FONT_SIZE 16.0
314    #endif
315    #define OSD_TEXT_BORDER   (OSD_FONT_SIZE/2)
316    #define OSD_TEXT_SKIP     (OSD_FONT_SIZE/8)
317    
318          if(but == OSD_NONE)  /* draw the shape of the source selection OSD, either only the puller (not expanded) */
319              but = osm_gps_map_osd_check_zoom(x, y);  /* or the entire menu incl. the puller (expanded) */
320    static void
321    osd_source_shape(osd_priv_t *priv, cairo_t *cr, gint x, gint y) {
322        if(!priv->source_sel.expanded) {
323            /* just draw the puller */
324            cairo_move_to (cr, x + OSD_S_PW, y + OSD_S_PH);
325            cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
326            cairo_line_to (cr, x + OSD_S_PW, y);
327        } else {
328            /* draw the puller and the area itself */
329            cairo_move_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y + OSD_S_AREA_H);
330            cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H);
331            if(OSD_S_Y > 0) {
332                cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_PH);
333                cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
334            } else {
335                cairo_arc (cr, x+OSD_S_RAD, y+OSD_S_AREA_H-OSD_S_RAD, OSD_S_RAD, M_PI/2, -M_PI/2);
336                cairo_line_to (cr, x + OSD_S_PW, y + OSD_S_AREA_H - OSD_S_PH);
337                cairo_line_to (cr, x + OSD_S_PW, y);
338            }
339            cairo_line_to (cr, x + OSD_S_PW + OSD_S_AREA_W, y);
340            cairo_close_path (cr);
341      }      }
342    }
343    
344      return but;  static void
345    osd_source_content(osm_gps_map_osd_t *osd, cairo_t *cr, gint offset) {
346        osd_priv_t *priv = (osd_priv_t*)osd->priv;
347    
348        int py = offset + OSD_S_RAD - OSD_S_D0;
349    
350        if(!priv->source_sel.expanded) {
351            /* draw the "puller" open (<) arrow */
352            cairo_move_to (cr, offset + OSD_S_RAD + OSD_S_D0/2, py);
353            cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
354            cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
355        } else {
356            if(OSD_S_Y < 0)
357                py += OSD_S_AREA_H - OSD_S_PH;
358    
359            /* draw the "puller" close (>) arrow */
360            cairo_move_to (cr, offset + OSD_S_RAD - OSD_S_D0/2, py);
361            cairo_rel_line_to (cr, +OSD_S_D0, +OSD_S_D0);
362            cairo_rel_line_to (cr, -OSD_S_D0, +OSD_S_D0);
363            cairo_stroke(cr);
364    
365            /* don't draw a shadow for the text content */
366            if(offset == 1) {
367                gint source;
368                g_object_get(osd->widget, "map-source", &source, NULL);
369    
370                cairo_select_font_face (cr, "Sans",
371                                        CAIRO_FONT_SLANT_NORMAL,
372                                        CAIRO_FONT_WEIGHT_BOLD);
373                cairo_set_font_size (cr, OSD_FONT_SIZE);
374    
375                int i, step = (priv->source_sel.height - 2*OSD_TEXT_BORDER) /
376                    OSM_GPS_MAP_SOURCE_LAST;
377                for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
378                    cairo_text_extents_t extents;
379                    const char *src = osm_gps_map_source_get_friendly_name(i);
380                    cairo_text_extents (cr, src, &extents);
381    
382                    int x = offset + OSD_S_PW + OSD_TEXT_BORDER;
383                    int y = offset + step * (i-1) + OSD_TEXT_BORDER;
384    
385                    /* draw filled rectangle if selected */
386                    if(source == i) {
387                        cairo_rectangle(cr, x - OSD_TEXT_BORDER/2,
388                                        y - OSD_TEXT_SKIP,
389                                        priv->source_sel.width - OSD_TEXT_BORDER,
390                                        step + OSD_TEXT_SKIP);
391                        cairo_fill(cr);
392    
393                        /* temprarily draw with background color */
394    #ifndef OSD_COLOR
395                        GdkColor bg = osd->widget->style->bg[GTK_STATE_NORMAL];
396                        gdk_cairo_set_source_color(cr, &bg);
397    #else
398                        cairo_set_source_rgb (cr, OSD_COLOR_BG);
399    #endif
400                    }
401    
402                    cairo_move_to (cr, x, y + OSD_TEXT_SKIP - extents.y_bearing);
403                    cairo_show_text (cr, src);
404    
405                    /* restore color */
406                    if(source == i) {
407    #ifndef OSD_COLOR
408                        GdkColor fg = osd->widget->style->fg[GTK_STATE_NORMAL];
409                        gdk_cairo_set_source_color(cr, &fg);
410    #else
411                        cairo_set_source_rgb (cr, OSD_COLOR);
412    #endif
413                    }
414                }
415            }
416        }
417  }  }
418    
419    static void
420    osd_render_source_sel(osm_gps_map_osd_t *osd, gboolean force_rerender) {
421        osd_priv_t *priv = (osd_priv_t*)osd->priv;
422    
423        if(priv->source_sel.rendered && !force_rerender)
424            return;
425    
426        priv->source_sel.rendered = TRUE;
427    
428    #ifndef OSD_COLOR
429        GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
430        GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
431        GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
432    #endif
433    
434        /* draw source selector */
435        cairo_t *cr = cairo_create(priv->source_sel.surface);
436        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
437        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
438        cairo_paint(cr);
439        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
440    
441  #ifdef OSD_SHADOW_ENABLE  #ifdef OSD_SHADOW_ENABLE
442  static void      osd_source_shape(priv, cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
443  osm_gps_map_osd_shape_shadow(cairo_t *cr) {      osd_shape_shadow(cr);
     cairo_set_source_rgba (cr, 0, 0, 0, 0.2);  
     cairo_fill (cr);  
     cairo_stroke (cr);  
 }  
444  #endif  #endif
445    
446        osd_source_shape(priv, cr, 1, 1);
447  #ifndef OSD_COLOR  #ifndef OSD_COLOR
448  /* if no color has been specified we just use the gdks default colors */      osd_shape(cr, &bg, &fg);
449  static void  #else
450  osm_gps_map_osd_shape(cairo_t *cr, GdkColor *bg, GdkColor *fg) {      osd_shape(cr);
451      gdk_cairo_set_source_color(cr, bg);  #endif
452      cairo_fill_preserve (cr);  
453      gdk_cairo_set_source_color(cr, fg);  #ifdef OSD_SHADOW_ENABLE
454      cairo_set_line_width (cr, 1);      osd_labels_shadow(cr, Z_RAD/3, TRUE);
455        osd_source_content(osd, cr, 1+OSD_LBL_SHADOW);
456      cairo_stroke (cr);      cairo_stroke (cr);
457  }  #endif
458    #ifndef OSD_COLOR
459        osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
460  #else  #else
461  static void      osd_labels(cr, Z_RAD/3, TRUE);
462  osm_gps_map_osd_shape(cairo_t *cr) {  #endif
463      cairo_set_source_rgb (cr, OSD_COLOR_BG);      osd_source_content(osd, cr, 1);
     cairo_fill_preserve (cr);  
     cairo_set_source_rgb (cr, OSD_COLOR);  
     cairo_set_line_width (cr, 1);  
464      cairo_stroke (cr);      cairo_stroke (cr);
465    
466        cairo_destroy(cr);
467  }  }
468    
469    /* re-allocate the buffer used to draw the menu. This is used */
470    /* to collapse/expand the buffer */
471    static void
472    osd_source_reallocate(osm_gps_map_osd_t *osd) {
473        osd_priv_t *priv = (osd_priv_t*)osd->priv;
474    
475        /* re-allocate offscreen bitmap */
476        g_assert (priv->source_sel.surface);
477    
478        int w = OSD_S_W, h = OSD_S_H;
479        if(priv->source_sel.expanded) {
480            cairo_text_extents_t extents;
481    
482            /* determine content size */
483            cairo_t *cr = cairo_create(priv->source_sel.surface);
484            cairo_select_font_face (cr, "Sans",
485                                    CAIRO_FONT_SLANT_NORMAL,
486                                    CAIRO_FONT_WEIGHT_BOLD);
487            cairo_set_font_size (cr, OSD_FONT_SIZE);
488    
489            /* calculate menu size */
490            int i, max_h = 0, max_w = 0;
491            for(i=OSM_GPS_MAP_SOURCE_NULL+1;i<=OSM_GPS_MAP_SOURCE_LAST;i++) {
492                const char *src = osm_gps_map_source_get_friendly_name(i);
493                cairo_text_extents (cr, src, &extents);
494    
495                if(extents.width > max_w) max_w = extents.width;
496                if(extents.height > max_h) max_h = extents.height;
497            }
498            cairo_destroy(cr);
499    
500            priv->source_sel.width  = max_w + 2*OSD_TEXT_BORDER;
501            priv->source_sel.height = OSM_GPS_MAP_SOURCE_LAST *
502                (max_h + 2*OSD_TEXT_SKIP) + 2*OSD_TEXT_BORDER;
503    
504            w = OSD_S_EXP_W;
505            h = OSD_S_EXP_H;
506        }
507    
508        cairo_surface_destroy(priv->source_sel.surface);
509        priv->source_sel.surface =
510            cairo_image_surface_create(CAIRO_FORMAT_ARGB32, w+2, h+2);
511    
512        osd_render_source_sel(osd, TRUE);
513    }
514    
515    #define OSD_HZ      15
516    #define OSD_TIME    500
517    
518    static gboolean osd_source_animate(gpointer data) {
519        osm_gps_map_osd_t *osd = (osm_gps_map_osd_t*)data;
520        osd_priv_t *priv = (osd_priv_t*)osd->priv;
521        int diff = OSD_S_EXP_W - OSD_S_W - OSD_S_X;
522        gboolean done = FALSE;
523        priv->source_sel.count += priv->source_sel.dir;
524    
525        /* shifting in */
526        if(priv->source_sel.dir < 0) {
527            if(priv->source_sel.count <= 0) {
528                priv->source_sel.count = 0;
529                done = TRUE;
530            }
531        } else {
532            if(priv->source_sel.count >= 1000) {
533                priv->source_sel.expanded = FALSE;
534                osd_source_reallocate(osd);
535    
536                priv->source_sel.count = 1000;
537                done = TRUE;
538            }
539        }
540    
541    
542        /* count runs linearly from 0 to 1000, map this nicely onto a position */
543    
544        /* nice sinoid mapping */
545        float m = 0.5-cos(priv->source_sel.count * M_PI / 1000.0)/2;
546        priv->source_sel.shift =
547            (osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X) +
548            m * diff;
549    
550        /* make sure the screen is updated */
551        osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
552    
553        /* stop animation if done */
554        if(done)
555            priv->source_sel.handler_id = 0;
556    
557        return !done;
558    }
559    
560    /* switch between expand and collapse mode of source selection */
561    static void
562    osd_source_toggle(osm_gps_map_osd_t *osd)
563    {
564        osd_priv_t *priv = (osd_priv_t*)osd->priv;
565    
566        /* ignore clicks while animation is running */
567        if(priv->source_sel.handler_id)
568            return;
569    
570        /* expand immediately, collapse is handle at the end of the */
571        /* collapse animation */
572        if(!priv->source_sel.expanded) {
573            priv->source_sel.expanded = TRUE;
574            osd_source_reallocate(osd);
575    
576            priv->source_sel.count = 1000;
577            priv->source_sel.shift = osd->widget->allocation.width - OSD_S_W;
578            priv->source_sel.dir = -1000/OSD_HZ;
579        } else {
580            priv->source_sel.count =  0;
581            priv->source_sel.shift = osd->widget->allocation.width -
582                OSD_S_EXP_W + OSD_S_X;
583            priv->source_sel.dir = +1000/OSD_HZ;
584        }
585    
586        /* start timer to handle animation */
587        priv->source_sel.handler_id = gtk_timeout_add(OSD_TIME/OSD_HZ,
588                                                      osd_source_animate, osd);
589    }
590    
591    /* check if the user clicked inside the source selection area */
592    static osd_button_t
593    osd_source_check(osm_gps_map_osd_t *osd, gint x, gint y) {
594        osd_priv_t *priv = (osd_priv_t*)osd->priv;
595    
596        if(!priv->source_sel.expanded)
597            x -= osd->widget->allocation.width - OSD_S_W;
598        else
599            x -= osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
600    
601        if(OSD_S_Y > 0)
602            y -= OSD_S_Y;
603        else
604            y -= osd->widget->allocation.height - OSD_S_PH + OSD_S_Y;
605    
606        /* within square around puller? */
607        if(y > 0 && y < OSD_S_PH && x > 0 && x < OSD_S_PW) {
608            /* really within puller shape? */
609            if(x > Z_RAD || osm_gps_map_in_circle(x, y, Z_RAD, Z_RAD, Z_RAD)) {
610                /* expand source selector */
611                osd_source_toggle(osd);
612    
613                /* tell upper layers that user clicked some background element */
614                /* of the OSD */
615                return OSD_BG;
616            }
617        }
618    
619        /* check for clicks into data area */
620        if(priv->source_sel.expanded && !priv->source_sel.handler_id) {
621            /* re-adjust from puller top to content top */
622            if(OSD_S_Y < 0)
623                y += OSD_S_EXP_H - OSD_S_PH;
624    
625            if(x > OSD_S_PW &&
626               x < OSD_S_PW + OSD_S_EXP_W &&
627               y > 0 &&
628               y < OSD_S_EXP_H) {
629    
630                int step = (priv->source_sel.height - 2*OSD_TEXT_BORDER)
631                    / OSM_GPS_MAP_SOURCE_LAST;
632    
633                y -= OSD_TEXT_BORDER - OSD_TEXT_SKIP;
634                y /= step;
635                y += 1;
636    
637                gint old = 0;
638                g_object_get(osd->widget, "map-source", &old, NULL);
639    
640                if(y > OSM_GPS_MAP_SOURCE_NULL &&
641                   y <= OSM_GPS_MAP_SOURCE_LAST &&
642                   old != y) {
643                    g_object_set(osd->widget, "map-source", y, NULL);
644    
645                    osd_render_source_sel(osd, TRUE);
646                    osm_gps_map_repaint(OSM_GPS_MAP(osd->widget));
647                }
648    
649                /* return "clicked in OSD background" to prevent further */
650                /* processing by application */
651                return OSD_BG;
652            }
653        }
654    
655        return OSD_NONE;
656    }
657    #endif // OSD_SOURCE_SEL
658    
659    static osd_button_t
660    osd_check(osm_gps_map_osd_t *osd, gint x, gint y) {
661        osd_button_t but = OSD_NONE;
662    
663    #ifdef OSD_SOURCE_SEL
664        /* the source selection area is handles internally */
665        but = osd_source_check(osd, x, y);
666        if(but != OSD_NONE)
667            return but;
668    #endif
669    
670        x -= OSD_X;
671        y -= OSD_Y;
672    
673        if(OSD_X < 0)
674            x -= (osd->widget->allocation.width - OSD_W);
675    
676        if(OSD_Y < 0)
677            y -= (osd->widget->allocation.height - OSD_H);
678    
679        /* first do a rough test for the OSD area. */
680        /* this is just to avoid an unnecessary detailed test */
681        if(x > 0 && x < OSD_W && y > 0 && y < OSD_H) {
682    #ifndef OSD_NO_DPAD
683            but = osd_check_dpad(x, y);
684  #endif  #endif
685    
686            if(but == OSD_NONE)
687                but = osd_check_zoom(x, y);
688        }
689    
690        return but;
691    }
692    
693    #ifndef OSD_NO_DPAD
694  static void  static void
695  osm_gps_map_osd_dpad_labels(cairo_t *cr, gint x, gint y) {  osd_dpad_labels(cairo_t *cr, gint x, gint y) {
696      /* move reference to dpad center */      /* move reference to dpad center */
697      x += D_RAD;      x += D_RAD;
698      y += D_RAD;      y += D_RAD;
# Line 234  osm_gps_map_osd_dpad_labels(cairo_t *cr, Line 715  osm_gps_map_osd_dpad_labels(cairo_t *cr,
715          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]);
716      }      }
717  }  }
718    #endif
719    
720  /* draw the sattelite dish icon in the center of the dpad */  #ifdef OSD_GPS_BUTTON
721  #define GPS_V0  (D_RAD/8)  /* draw the satellite dish icon in the center of the dpad */
722    #define GPS_V0  (D_RAD/7)
723  #define GPS_V1  (D_RAD/10)  #define GPS_V1  (D_RAD/10)
724  #define GPS_V2  (D_RAD/5)  #define GPS_V2  (D_RAD/5)
725    
726  /* draw a satellite receiver dish */  /* draw a satellite receiver dish */
727    /* this is either drawn in the center of the dpad (if present) */
728    /* or in the middle of the zoom area */
729  static void  static void
730  osm_gps_map_osd_dpad_gps(cairo_t *cr, gint x, gint y) {  osd_dpad_gps(cairo_t *cr, gint x, gint y) {
731      /* move reference to dpad center */      /* move reference to dpad center */
732      x += D_RAD;      x += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD * 3;
733      y += D_RAD + GPS_V0;      y += (1-Z_GPS) * D_RAD + Z_GPS * Z_RAD + GPS_V0;
734    
735      cairo_move_to (cr, x-GPS_V0, y+GPS_V0);      cairo_move_to (cr, x-GPS_V0, y+GPS_V0);
736      cairo_rel_line_to (cr, +GPS_V0, -GPS_V0);      cairo_rel_line_to (cr, +GPS_V0, -GPS_V0);
# Line 260  osm_gps_map_osd_dpad_gps(cairo_t *cr, gi Line 745  osm_gps_map_osd_dpad_gps(cairo_t *cr, gi
745      cairo_move_to (cr, x, y-GPS_V2);      cairo_move_to (cr, x, y-GPS_V2);
746      cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);      cairo_rel_line_to (cr, +GPS_V1, -GPS_V1);
747  }  }
748    #endif
749    
750  #define Z_LEN  (2*Z_RAD/3)  #define Z_LEN  (2*Z_RAD/3)
751    
752  static void  static void
753  osm_gps_map_osd_zoom_labels(cairo_t *cr, gint x, gint y) {  osd_zoom_labels(cairo_t *cr, gint x, gint y) {
754      cairo_move_to (cr, x + Z_LEFT  - Z_LEN, y + Z_MID);      cairo_move_to (cr, x + Z_LEFT  - Z_LEN, y + Z_MID);
755      cairo_line_to (cr, x + Z_LEFT  + Z_LEN, y + Z_MID);      cairo_line_to (cr, x + Z_LEFT  + Z_LEN, y + Z_MID);
756    
# Line 274  osm_gps_map_osd_zoom_labels(cairo_t *cr, Line 760  osm_gps_map_osd_zoom_labels(cairo_t *cr,
760      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);
761  }  }
762    
763  #ifndef OSD_COLOR  #ifdef OSD_COORDINATES
764  /* if no color has been specified we just use the gdks default colors */  
765    #ifndef OSD_COORDINATES_FONT_SIZE
766    #define OSD_COORDINATES_FONT_SIZE 12
767    #endif
768    
769    #define OSD_COORDINATES_OFFSET (OSD_COORDINATES_FONT_SIZE/6)
770    
771    #define OSD_COORDINATES_W  (8*OSD_COORDINATES_FONT_SIZE+2*OSD_COORDINATES_OFFSET)
772    #define OSD_COORDINATES_H  (2*OSD_COORDINATES_FONT_SIZE+OSD_COORDINATES_OFFSET)
773    
774    /* these can be overwritten with versions that support */
775    /* localization */
776    #ifndef OSD_COORDINATES_CHR_N
777    #define OSD_COORDINATES_CHR_N  "N"
778    #endif
779    #ifndef OSD_COORDINATES_CHR_S
780    #define OSD_COORDINATES_CHR_S  "S"
781    #endif
782    #ifndef OSD_COORDINATES_CHR_E
783    #define OSD_COORDINATES_CHR_E  "E"
784    #endif
785    #ifndef OSD_COORDINATES_CHR_W
786    #define OSD_COORDINATES_CHR_W  "W"
787    #endif
788    
789    
790    
791    /* this is the classic geocaching notation */
792    static char
793    *osd_latitude_str(float latitude) {
794        char *c = OSD_COORDINATES_CHR_N;
795        float integral, fractional;
796    
797        if(isnan(latitude))
798            return NULL;
799    
800        if(latitude < 0) {
801            latitude = fabs(latitude);
802            c = OSD_COORDINATES_CHR_S;
803        }
804    
805        fractional = modff(latitude, &integral);
806    
807        return g_strdup_printf("%s %02d° %06.3f'",
808                               c, (int)integral, fractional*60.0);
809    }
810    
811    static char
812    *osd_longitude_str(float longitude) {
813        char *c = OSD_COORDINATES_CHR_E;
814        float integral, fractional;
815    
816        if(isnan(longitude))
817            return NULL;
818    
819        if(longitude < 0) {
820            longitude = fabs(longitude);
821            c = OSD_COORDINATES_CHR_W;
822        }
823    
824        fractional = modff(longitude, &integral);
825    
826        return g_strdup_printf("%s %03d° %06.3f'",
827                               c, (int)integral, fractional*60.0);
828    }
829    
830  static void  static void
831  osm_gps_map_osd_labels(cairo_t *cr, gint width, gboolean enabled,  osd_render_coordinates(osm_gps_map_osd_t *osd)
832                         GdkColor *fg, GdkColor *disabled) {  {
833      if(enabled)  gdk_cairo_set_source_color(cr, fg);      osd_priv_t *priv = (osd_priv_t*)osd->priv;
834      else         gdk_cairo_set_source_color(cr, disabled);  
835      cairo_set_line_width (cr, width);      /* get current map position */
836        gfloat lat, lon;
837        g_object_get(osd->widget, "latitude", &lat, "longitude", &lon, NULL);
838    
839        /* check if position has changed enough to require redraw */
840        if(!isnan(priv->coordinates.lat) && !isnan(priv->coordinates.lon))
841            /* 1/60000 == 1/1000 minute */
842            if((fabsf(lat - priv->coordinates.lat) < 1/60000) &&
843               (fabsf(lon - priv->coordinates.lon) < 1/60000))
844                return;
845    
846        priv->coordinates.lat = lat;
847        priv->coordinates.lon = lon;
848    
849        /* first fill with transparency */
850        cairo_t *cr = cairo_create(priv->coordinates.surface);
851        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
852        //    cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 0.5);
853        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
854        cairo_paint(cr);
855        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
856    
857        cairo_select_font_face (cr, "Sans",
858                                CAIRO_FONT_SLANT_NORMAL,
859                                CAIRO_FONT_WEIGHT_BOLD);
860        cairo_set_font_size (cr, OSD_COORDINATES_FONT_SIZE);
861    
862        char *latitude = osd_latitude_str(lat);
863        char *longitude = osd_longitude_str(lon);
864    
865        cairo_text_extents_t lat_extents, lon_extents;
866        cairo_text_extents (cr, latitude, &lat_extents);
867        cairo_text_extents (cr, longitude, &lon_extents);
868    
869        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
870        cairo_set_line_width (cr, OSD_COORDINATES_FONT_SIZE/6);
871        cairo_move_to (cr,
872                       (OSD_COORDINATES_W - lat_extents.width)/2,
873                       OSD_COORDINATES_OFFSET - lat_extents.y_bearing);
874        cairo_text_path (cr, latitude);
875        cairo_move_to (cr,
876                       (OSD_COORDINATES_W - lon_extents.width)/2,
877                       OSD_COORDINATES_OFFSET - lon_extents.y_bearing +
878                       OSD_COORDINATES_FONT_SIZE);
879        cairo_text_path (cr, longitude);
880      cairo_stroke (cr);      cairo_stroke (cr);
881    
882        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
883        cairo_move_to (cr,
884                       (OSD_COORDINATES_W - lat_extents.width)/2,
885                       OSD_COORDINATES_OFFSET - lat_extents.y_bearing);
886        cairo_show_text (cr, latitude);
887        cairo_move_to (cr,
888                       (OSD_COORDINATES_W - lon_extents.width)/2,
889                       OSD_COORDINATES_OFFSET - lon_extents.y_bearing +
890                       OSD_COORDINATES_FONT_SIZE);
891        cairo_show_text (cr, longitude);
892    
893        g_free(latitude);
894        g_free(longitude);
895    
896        cairo_destroy(cr);
897  }  }
898  #else  #endif  // OSD_COORDINATES
899    
900    #ifdef OSD_CROSSHAIR
901    
902    #ifndef OSD_CROSSHAIR_RADIUS
903    #define OSD_CROSSHAIR_RADIUS 10
904    #endif
905    
906    #define OSD_CROSSHAIR_TICK  (OSD_CROSSHAIR_RADIUS/2)
907    #define OSD_CROSSHAIR_BORDER (OSD_CROSSHAIR_TICK + OSD_CROSSHAIR_RADIUS/4)
908    #define OSD_CROSSHAIR_W  ((OSD_CROSSHAIR_RADIUS+OSD_CROSSHAIR_BORDER)*2)
909    #define OSD_CROSSHAIR_H  ((OSD_CROSSHAIR_RADIUS+OSD_CROSSHAIR_BORDER)*2)
910    
911  static void  static void
912  osm_gps_map_osd_labels(cairo_t *cr, gint width, gboolean enabled) {  osd_render_crosshair_shape(cairo_t *cr) {
913      if(enabled)  cairo_set_source_rgb (cr, OSD_COLOR);      cairo_arc (cr, OSD_CROSSHAIR_W/2, OSD_CROSSHAIR_H/2,
914      else         cairo_set_source_rgb (cr, OSD_COLOR_DISABLED);                 OSD_CROSSHAIR_RADIUS, 0,  2*M_PI);
915      cairo_set_line_width (cr, width);  
916        cairo_move_to (cr, OSD_CROSSHAIR_W/2 - OSD_CROSSHAIR_RADIUS,
917                       OSD_CROSSHAIR_H/2);
918        cairo_rel_line_to (cr, -OSD_CROSSHAIR_TICK, 0);
919        cairo_move_to (cr, OSD_CROSSHAIR_W/2 + OSD_CROSSHAIR_RADIUS,
920                       OSD_CROSSHAIR_H/2);
921        cairo_rel_line_to (cr,  OSD_CROSSHAIR_TICK, 0);
922    
923        cairo_move_to (cr, OSD_CROSSHAIR_W/2,
924                       OSD_CROSSHAIR_H/2 - OSD_CROSSHAIR_RADIUS);
925        cairo_rel_line_to (cr, 0, -OSD_CROSSHAIR_TICK);
926        cairo_move_to (cr, OSD_CROSSHAIR_W/2,
927                       OSD_CROSSHAIR_H/2 + OSD_CROSSHAIR_RADIUS);
928        cairo_rel_line_to (cr, 0, OSD_CROSSHAIR_TICK);
929    
930      cairo_stroke (cr);      cairo_stroke (cr);
931  }  }
932    
933    static void
934    osd_render_crosshair(osm_gps_map_osd_t *osd)
935    {
936        osd_priv_t *priv = (osd_priv_t*)osd->priv;
937    
938        if(priv->crosshair.rendered)
939            return;
940    
941        priv->crosshair.rendered = TRUE;
942    
943        /* first fill with transparency */
944        cairo_t *cr = cairo_create(priv->crosshair.surface);
945        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
946        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.0);
947        cairo_paint(cr);
948        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
949    
950        cairo_set_line_cap  (cr, CAIRO_LINE_CAP_ROUND);
951    
952        cairo_set_source_rgba (cr, 1.0, 1.0, 1.0, 0.5);
953        cairo_set_line_width (cr, OSD_CROSSHAIR_RADIUS/2);
954        osd_render_crosshair_shape(cr);
955    
956        cairo_set_source_rgba (cr, 0.0, 0.0, 0.0, 0.5);
957        cairo_set_line_width (cr, OSD_CROSSHAIR_RADIUS/4);
958        osd_render_crosshair_shape(cr);
959    
960        cairo_destroy(cr);
961    }
962  #endif  #endif
963    
964  #ifdef OSD_SHADOW_ENABLE  #ifdef OSD_SCALE
965  static void  
966  osm_gps_map_osd_labels_shadow(cairo_t *cr, gint width, gboolean enabled) {  #ifndef OSD_SCALE_FONT_SIZE
967      cairo_set_source_rgba (cr, 0, 0, 0, enabled?0.3:0.15);  #define OSD_SCALE_FONT_SIZE 12
968      cairo_set_line_width (cr, width);  #endif
969    #define OSD_SCALE_W   (10*OSD_SCALE_FONT_SIZE)
970    #define OSD_SCALE_H   (5*OSD_SCALE_FONT_SIZE/2)
971    
972    /* various parameters used to create the scale */
973    #define OSD_SCALE_H2   (OSD_SCALE_H/2)
974    #define OSD_SCALE_TICK (2*OSD_SCALE_FONT_SIZE/3)
975    #define OSD_SCALE_M    (OSD_SCALE_H2 - OSD_SCALE_TICK)
976    #define OSD_SCALE_I    (OSD_SCALE_H2 + OSD_SCALE_TICK)
977    #define OSD_SCALE_FD   (OSD_SCALE_FONT_SIZE/4)
978    
979    static void
980    osd_render_scale(osm_gps_map_osd_t *osd)
981    {
982        osd_priv_t *priv = (osd_priv_t*)osd->priv;
983    
984        /* this only needs to be rendered if the zoom has changed */
985        gint zoom;
986        g_object_get(OSM_GPS_MAP(osd->widget), "zoom", &zoom, NULL);
987        if(zoom == priv->scale.zoom)
988            return;
989    
990        priv->scale.zoom = zoom;
991    
992        float m_per_pix = osm_gps_map_get_scale(OSM_GPS_MAP(osd->widget));
993    
994        /* first fill with transparency */
995        cairo_t *cr = cairo_create(priv->scale.surface);
996        cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
997        cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.0);
998        // pink for testing:    cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2);
999        cairo_paint(cr);
1000        cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1001    
1002        /* determine the size of the scale width in meters */
1003        float width = (OSD_SCALE_W-OSD_SCALE_FONT_SIZE/6) * m_per_pix;
1004    
1005        /* scale this to useful values */
1006        int exp = logf(width)*M_LOG10E;
1007        int mant = width/pow(10,exp);
1008        int width_metric = mant * pow(10,exp);
1009        char *dist_str = NULL;
1010        if(width_metric<1000)
1011            dist_str = g_strdup_printf("%u m", width_metric);
1012        else
1013            dist_str = g_strdup_printf("%u km", width_metric/1000);
1014        width_metric /= m_per_pix;
1015    
1016        /* and now the hard part: scale for useful imperial values :-( */
1017        /* try to convert to feet, 1ft == 0.3048 m */
1018        width /= 0.3048;
1019        float imp_scale = 0.3048;
1020        char *dist_imp_unit = "ft";
1021    
1022        if(width >= 100) {
1023            /* 1yd == 3 feet */
1024            width /= 3.0;
1025            imp_scale *= 3.0;
1026            dist_imp_unit = "yd";
1027    
1028            if(width >= 1760.0) {
1029                /* 1mi == 1760 yd */
1030                width /= 1760.0;
1031                imp_scale *= 1760.0;
1032                dist_imp_unit = "mi";
1033            }
1034        }
1035    
1036        /* also convert this to full tens/hundreds */
1037        exp = logf(width)*M_LOG10E;
1038        mant = width/pow(10,exp);
1039        int width_imp = mant * pow(10,exp);
1040        char *dist_str_imp = g_strdup_printf("%u %s", width_imp, dist_imp_unit);
1041    
1042        /* convert back to pixels */
1043        width_imp *= imp_scale;
1044        width_imp /= m_per_pix;
1045    
1046        cairo_select_font_face (cr, "Sans",
1047                                CAIRO_FONT_SLANT_NORMAL,
1048                                CAIRO_FONT_WEIGHT_BOLD);
1049        cairo_set_font_size (cr, OSD_SCALE_FONT_SIZE);
1050        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
1051    
1052        cairo_text_extents_t extents;
1053        cairo_text_extents (cr, dist_str, &extents);
1054    
1055        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
1056        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6);
1057        cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD);
1058        cairo_text_path (cr, dist_str);
1059        cairo_stroke (cr);
1060        cairo_move_to (cr, 2*OSD_SCALE_FD,
1061                       OSD_SCALE_H2+OSD_SCALE_FD + extents.height);
1062        cairo_text_path (cr, dist_str_imp);
1063      cairo_stroke (cr);      cairo_stroke (cr);
1064    
1065        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
1066        cairo_move_to (cr, 2*OSD_SCALE_FD, OSD_SCALE_H2-OSD_SCALE_FD);
1067        cairo_show_text (cr, dist_str);
1068        cairo_move_to (cr, 2*OSD_SCALE_FD,
1069                       OSD_SCALE_H2+OSD_SCALE_FD + extents.height);
1070        cairo_show_text (cr, dist_str_imp);
1071    
1072        g_free(dist_str);
1073        g_free(dist_str_imp);
1074    
1075        /* draw white line */
1076        cairo_set_line_cap  (cr, CAIRO_LINE_CAP_ROUND);
1077        cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);
1078        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/3);
1079        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M);
1080        cairo_rel_line_to (cr, 0,  OSD_SCALE_TICK);
1081        cairo_rel_line_to (cr, width_metric, 0);
1082        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1083        cairo_stroke(cr);
1084        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I);
1085        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1086        cairo_rel_line_to (cr, width_imp, 0);
1087        cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK);
1088        cairo_stroke(cr);
1089    
1090        /* draw black line */
1091        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
1092        cairo_set_line_width (cr, OSD_SCALE_FONT_SIZE/6);
1093        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_M);
1094        cairo_rel_line_to (cr, 0,  OSD_SCALE_TICK);
1095        cairo_rel_line_to (cr, width_metric, 0);
1096        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1097        cairo_stroke(cr);
1098        cairo_move_to (cr, OSD_SCALE_FONT_SIZE/6, OSD_SCALE_I);
1099        cairo_rel_line_to (cr, 0, -OSD_SCALE_TICK);
1100        cairo_rel_line_to (cr, width_imp, 0);
1101        cairo_rel_line_to (cr, 0, +OSD_SCALE_TICK);
1102        cairo_stroke(cr);
1103    
1104        cairo_destroy(cr);
1105  }  }
1106  #endif  #endif
1107    
1108  static void  static void
1109  osm_gps_map_osd_render(osm_gps_map_osd_t *osd) {  osd_render_controls(osm_gps_map_osd_t *osd)
1110    {
1111      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
1112    
1113        if(priv->controls.rendered
1114    #ifdef OSD_GPS_BUTTON
1115           && (priv->controls.gps_enabled == (osd->cb != NULL))
1116    #endif
1117           )
1118            return;
1119    
1120    #ifdef OSD_GPS_BUTTON
1121        priv->controls.gps_enabled = (osd->cb != NULL);
1122    #endif
1123        priv->controls.rendered = TRUE;
1124    
1125    #ifndef OSD_COLOR
1126        GdkColor bg = GTK_WIDGET(osd->widget)->style->bg[GTK_STATE_NORMAL];
1127        GdkColor fg = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_NORMAL];
1128        GdkColor da = GTK_WIDGET(osd->widget)->style->fg[GTK_STATE_INSENSITIVE];
1129    #endif
1130    
1131      /* first fill with transparency */      /* first fill with transparency */
1132      cairo_t *cr = cairo_create(priv->overlay);      cairo_t *cr = cairo_create(priv->controls.surface);
1133      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
1134      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);
1135      cairo_paint(cr);      cairo_paint(cr);
   
1136      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
1137    
1138      /* --------- draw zoom and dpad shape shadow ----------- */      /* --------- draw zoom and dpad shape shadow ----------- */
     gint x = 0, y = 0;  
   
1139  #ifdef OSD_SHADOW_ENABLE  #ifdef OSD_SHADOW_ENABLE
1140      osm_gps_map_osd_zoom_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);      osd_zoom_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
1141      osm_gps_map_osd_shape_shadow(cr);      osd_shape_shadow(cr);
1142      osm_gps_map_osd_dpad_shape(cr, x + OSD_SHADOW, y + OSD_SHADOW);  #ifndef OSD_NO_DPAD
1143      osm_gps_map_osd_shape_shadow(cr);      osd_dpad_shape(cr, 1+OSD_SHADOW, 1+OSD_SHADOW);
1144        osd_shape_shadow(cr);
1145    #endif
1146  #endif  #endif
1147    
1148      /* --------- draw zoom and dpad shape ----------- */      /* --------- draw zoom and dpad shape ----------- */
1149    
1150      osm_gps_map_osd_zoom_shape(cr, x, y);      osd_zoom_shape(cr, 1, 1);
1151  #ifndef OSD_COLOR  #ifndef OSD_COLOR
1152      osm_gps_map_osd_shape(cr, &priv->bg, &priv->fg);      osd_shape(cr, &bg, &fg);
1153  #else  #else
1154      osm_gps_map_osd_shape(cr);      osd_shape(cr);
1155  #endif  #endif
1156      osm_gps_map_osd_dpad_shape(cr, x, y);  #ifndef OSD_NO_DPAD
1157        osd_dpad_shape(cr, 1, 1);
1158  #ifndef OSD_COLOR  #ifndef OSD_COLOR
1159      osm_gps_map_osd_shape(cr, &priv->bg, &priv->fg);      osd_shape(cr, &bg, &fg);
1160  #else  #else
1161      osm_gps_map_osd_shape(cr);      osd_shape(cr);
1162    #endif
1163  #endif  #endif
1164    
1165      /* --------- draw zoom and dpad labels --------- */      /* --------- draw zoom and dpad labels --------- */
1166    
1167  #ifdef OSD_SHADOW_ENABLE  #ifdef OSD_SHADOW_ENABLE
1168      osm_gps_map_osd_zoom_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);      osd_labels_shadow(cr, Z_RAD/3, TRUE);
1169      osm_gps_map_osd_dpad_labels(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);      osd_zoom_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
1170      osm_gps_map_osd_labels_shadow(cr, Z_RAD/3, TRUE);  #ifndef OSD_NO_DPAD
1171      osm_gps_map_osd_dpad_gps(cr, x + OSD_LBL_SHADOW, y + OSD_LBL_SHADOW);      osd_dpad_labels(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
1172      osm_gps_map_osd_labels_shadow(cr, Z_RAD/6, osd->cb != NULL);  #endif
1173        cairo_stroke(cr);
1174    #ifdef OSD_GPS_BUTTON
1175        osd_labels_shadow(cr, Z_RAD/6, osd->cb != NULL);
1176        osd_dpad_gps(cr, 1+OSD_LBL_SHADOW, 1+OSD_LBL_SHADOW);
1177        cairo_stroke(cr);
1178    #endif
1179  #endif  #endif
1180    
     osm_gps_map_osd_zoom_labels(cr, x, y);  
     osm_gps_map_osd_dpad_labels(cr, x, y);  
1181  #ifndef OSD_COLOR  #ifndef OSD_COLOR
1182      osm_gps_map_osd_labels(cr, Z_RAD/3, TRUE, &priv->fg, &priv->da);      osd_labels(cr, Z_RAD/3, TRUE, &fg, &da);
1183  #else  #else
1184      osm_gps_map_osd_labels(cr, Z_RAD/3, TRUE);      osd_labels(cr, Z_RAD/3, TRUE);
1185    #endif
1186        osd_zoom_labels(cr, 1, 1);
1187    #ifndef OSD_NO_DPAD
1188        osd_dpad_labels(cr, 1, 1);
1189  #endif  #endif
1190      osm_gps_map_osd_dpad_gps(cr, x, y);      cairo_stroke(cr);
1191    
1192  #ifndef OSD_COLOR  #ifndef OSD_COLOR
1193      osm_gps_map_osd_labels(cr, Z_RAD/6, osd->cb != NULL, &priv->fg, &priv->da);      osd_labels(cr, Z_RAD/6, osd->cb != NULL, &fg, &da);
1194  #else  #else
1195      osm_gps_map_osd_labels(cr, Z_RAD/6, osd->cb != NULL);      osd_labels(cr, Z_RAD/6, osd->cb != NULL);
1196  #endif  #endif
1197    #ifdef OSD_GPS_BUTTON
1198        osd_dpad_gps(cr, 1, 1);
1199    #endif
1200        cairo_stroke(cr);
1201    
1202      cairo_destroy(cr);      cairo_destroy(cr);
1203  }  }
1204    
1205  static void  static void
1206  osm_gps_map_osd_draw(osm_gps_map_osd_t *osd, GdkDrawable *drawable)  osd_render(osm_gps_map_osd_t *osd)
1207    {
1208        /* this function is actually called pretty often since the */
1209        /* OSD contents may have changed (due to a coordinate/zoom change). */
1210        /* The different OSD parts have to make sure that they don't */
1211        /* render unneccessarily often and thus waste CPU power */
1212    
1213        osd_render_controls(osd);
1214    
1215    #ifdef OSD_SOURCE_SEL
1216        osd_render_source_sel(osd, FALSE);
1217    #endif
1218    
1219    #ifdef OSD_SCALE
1220        osd_render_scale(osd);
1221    #endif
1222    
1223    #ifdef OSD_CROSSHAIR
1224        osd_render_crosshair(osd);
1225    #endif
1226    
1227    #ifdef OSD_COORDINATES
1228        osd_render_coordinates(osd);
1229    #endif
1230    }
1231    
1232    static void
1233    osd_draw(osm_gps_map_osd_t *osd, GdkDrawable *drawable)
1234  {  {
1235      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
1236    
1237      /* OSD itself uses some off-screen rendering, so check if the */      /* OSD itself uses some off-screen rendering, so check if the */
1238      /* offscreen buffer is present and create it if not */      /* offscreen buffer is present and create it if not */
1239      if(!priv->overlay) {      if(!priv->controls.surface) {
1240          /* create overlay ... */          /* create overlay ... */
1241          priv->overlay =          priv->controls.surface =
1242              cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W, OSD_H);              cairo_image_surface_create(CAIRO_FORMAT_ARGB32, OSD_W+2, OSD_H+2);
1243    
1244            priv->controls.rendered = FALSE;
1245    #ifdef OSD_GPS_BUTTON
1246            priv->controls.gps_enabled = FALSE;
1247    #endif
1248    
1249    #ifdef OSD_SOURCE_SEL
1250            /* the initial OSD state is alway not-expanded */
1251            priv->source_sel.surface =
1252                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1253                                               OSD_S_W+2, OSD_S_H+2);
1254            priv->source_sel.rendered = FALSE;
1255    #endif
1256    
1257    #ifdef OSD_SCALE
1258            priv->scale.surface =
1259                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1260                                           OSD_SCALE_W, OSD_SCALE_H);
1261            priv->scale.zoom = -1;
1262    #endif
1263    
1264    #ifdef OSD_CROSSHAIR
1265            priv->crosshair.surface =
1266                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1267                                           OSD_CROSSHAIR_W, OSD_CROSSHAIR_H);
1268            priv->crosshair.rendered = FALSE;
1269    #endif
1270    
1271    #ifdef OSD_COORDINATES
1272            priv->coordinates.surface =
1273                cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
1274                                           OSD_COORDINATES_W, OSD_COORDINATES_H);
1275    
1276            priv->coordinates.lat = priv->coordinates.lon = OSM_GPS_MAP_INVALID;
1277    #endif
1278    
1279          /* ... and render it */          /* ... and render it */
1280          osm_gps_map_osd_render(osd);          osd_render(osd);
1281      }      }
1282    
1283      // now draw this onto the original context      // now draw this onto the original context
1284      cairo_t *cr = gdk_cairo_create(drawable);      cairo_t *cr = gdk_cairo_create(drawable);
1285      cairo_set_source_surface(cr, priv->overlay, OSD_X, OSD_Y);  
1286        int x, y;
1287    
1288    #ifdef OSD_SCALE
1289        x =  OSD_X;
1290        y = -OSD_Y;
1291        if(x < 0) x += osd->widget->allocation.width - OSD_SCALE_W;
1292        if(y < 0) y += osd->widget->allocation.height - OSD_SCALE_H;
1293    
1294        cairo_set_source_surface(cr, priv->scale.surface, x, y);
1295        cairo_paint(cr);
1296    #endif
1297    
1298    #ifdef OSD_CROSSHAIR
1299        x = (osd->widget->allocation.width - OSD_CROSSHAIR_W)/2;
1300        y = (osd->widget->allocation.height - OSD_CROSSHAIR_H)/2;
1301    
1302        cairo_set_source_surface(cr, priv->crosshair.surface, x, y);
1303        cairo_paint(cr);
1304    #endif
1305    
1306    #ifdef OSD_COORDINATES
1307        x = -OSD_X;
1308        y = -OSD_Y;
1309        if(x < 0) x += osd->widget->allocation.width - OSD_COORDINATES_W;
1310        if(y < 0) y += osd->widget->allocation.height - OSD_COORDINATES_H;
1311    
1312        cairo_set_source_surface(cr, priv->coordinates.surface, x, y);
1313        cairo_paint(cr);
1314    #endif
1315    
1316        x = OSD_X;
1317        if(x < 0)
1318            x += osd->widget->allocation.width - OSD_W;
1319    
1320        y = OSD_Y;
1321        if(y < 0)
1322            y += osd->widget->allocation.height - OSD_H;
1323    
1324        cairo_set_source_surface(cr, priv->controls.surface, x, y);
1325        cairo_paint(cr);
1326    
1327    #ifdef OSD_SOURCE_SEL
1328        if(!priv->source_sel.handler_id) {
1329            /* the OSD source selection is not being animated */
1330            if(!priv->source_sel.expanded)
1331                x = osd->widget->allocation.width - OSD_S_W;
1332            else
1333                x = osd->widget->allocation.width - OSD_S_EXP_W + OSD_S_X;
1334        } else
1335            x = priv->source_sel.shift;
1336    
1337        y = OSD_S_Y;
1338        if(OSD_S_Y < 0) {
1339            if(!priv->source_sel.expanded)
1340                y = osd->widget->allocation.height - OSD_S_H + OSD_S_Y;
1341            else
1342                y = osd->widget->allocation.height - OSD_S_EXP_H + OSD_S_Y;
1343        }
1344    
1345        cairo_set_source_surface(cr, priv->source_sel.surface, x, y);
1346      cairo_paint(cr);      cairo_paint(cr);
1347    #endif
1348    
1349      cairo_destroy(cr);      cairo_destroy(cr);
1350  }  }
1351    
1352  static void  static void
1353  osm_gps_map_osd_free(osm_gps_map_osd_t *osd)  osd_free(osm_gps_map_osd_t *osd)
1354  {  {
1355      osd_priv_t *priv = (osd_priv_t *)(osd->priv);      osd_priv_t *priv = (osd_priv_t *)(osd->priv);
1356    
1357      if (priv->overlay)      if (priv->controls.surface)
1358           cairo_surface_destroy(priv->overlay);           cairo_surface_destroy(priv->controls.surface);
1359    
1360    #ifdef OSD_SOURCE_SEL
1361        if(priv->source_sel.handler_id)
1362            gtk_timeout_remove(priv->source_sel.handler_id);
1363    
1364        if (priv->source_sel.surface)
1365             cairo_surface_destroy(priv->source_sel.surface);
1366    #endif
1367    
1368    #ifdef OSD_SCALE
1369        if (priv->scale.surface)
1370             cairo_surface_destroy(priv->scale.surface);
1371    #endif
1372    
1373    #ifdef OSD_CROSSHAIR
1374        if (priv->crosshair.surface)
1375             cairo_surface_destroy(priv->crosshair.surface);
1376    #endif
1377    
1378    #ifdef OSD_COORDINATES
1379        if (priv->coordinates.surface)
1380             cairo_surface_destroy(priv->coordinates.surface);
1381    #endif
1382    
1383      g_free(priv);      g_free(priv);
1384  }  }
1385    
1386    static gboolean
1387    osd_busy(osm_gps_map_osd_t *osd)
1388    {
1389    #ifdef OSD_SOURCE_SEL
1390        osd_priv_t *priv = (osd_priv_t *)(osd->priv);
1391        return (priv->source_sel.handler_id != 0);
1392    #else
1393        return FALSE;
1394    #endif
1395    }
1396    
1397  static osm_gps_map_osd_t osd_classic = {  static osm_gps_map_osd_t osd_classic = {
1398      .draw       = osm_gps_map_osd_draw,      .widget     = NULL,
1399      .check      = osm_gps_map_osd_check,  
1400      .render     = osm_gps_map_osd_render,      .draw       = osd_draw,
1401      .free       = osm_gps_map_osd_free,      .check      = osd_check,
1402        .render     = osd_render,
1403        .free       = osd_free,
1404        .busy       = osd_busy,
1405    
1406      .cb         = NULL,      .cb         = NULL,
1407      .data       = NULL,      .data       = NULL,
# Line 420  osm_gps_map_osd_classic_init(OsmGpsMap * Line 1417  osm_gps_map_osd_classic_init(OsmGpsMap *
1417    
1418      osd_classic.priv = priv;      osd_classic.priv = priv;
1419    
     /* extract style info from the widget */  
     priv->bg = GTK_WIDGET(map)->style->bg[GTK_STATE_NORMAL];  
     priv->fg = GTK_WIDGET(map)->style->fg[GTK_STATE_NORMAL];  
     priv->da = GTK_WIDGET(map)->style->fg[GTK_STATE_INSENSITIVE];  
   
1420      osm_gps_map_register_osd(map, &osd_classic);      osm_gps_map_register_osd(map, &osd_classic);
1421  }  }
1422    
1423    #ifdef OSD_GPS_BUTTON
1424  /* below are osd specific functions which aren't used by osm-gps-map */  /* below are osd specific functions which aren't used by osm-gps-map */
1425  /* but instead are to be used by the main application */  /* but instead are to be used by the main application */
1426  void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb, gpointer data) {  void osm_gps_map_osd_enable_gps (OsmGpsMap *map, OsmGpsMapOsdCallback cb,
1427                                     gpointer data) {
1428      osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);      osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
   
1429      g_return_if_fail (osd);      g_return_if_fail (osd);
1430    
1431      osd->cb = cb;      osd->cb = cb;
# Line 445  void osm_gps_map_osd_enable_gps (OsmGpsM Line 1437  void osm_gps_map_osd_enable_gps (OsmGpsM
1437    
1438      osm_gps_map_redraw(map);      osm_gps_map_redraw(map);
1439  }  }
1440    #endif
1441    
1442    osd_button_t
1443    osm_gps_map_osd_check(OsmGpsMap *map, gint x, gint y) {
1444        osm_gps_map_osd_t *osd = osm_gps_map_osd_get(map);
1445        g_return_val_if_fail (osd, OSD_NONE);
1446    
1447        return osd_check(osd, x, y);
1448    }
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  Added in v.111