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

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revision 98 by harbaum, Mon Sep 7 13:20:37 2009 UTC revision 100 by harbaum, Tue Sep 8 10:24:11 2009 UTC
# Line 27  Line 27 
27    
28  #define OSD_SCALE  #define OSD_SCALE
29    
30  #define OSD_SCALE_W  100  #define OSD_SCALE_W  120
31  #define OSD_SCALE_H   20  #define OSD_SCALE_H   20
32    
33  #ifndef USE_CAIRO  #ifndef USE_CAIRO
# Line 451  osd_source_reallocate(osm_gps_map_osd_t Line 451  osd_source_reallocate(osm_gps_map_osd_t
451    
452      int w = OSD_S_W, h = OSD_S_H;      int w = OSD_S_W, h = OSD_S_H;
453      if(priv->expanded) {      if(priv->expanded) {
         /* ... and right of it the waypoint id */  
454          cairo_text_extents_t extents;          cairo_text_extents_t extents;
455    
456          /* determine content size */          /* determine content size */
# Line 728  osd_zoom_labels(cairo_t *cr, gint x, gin Line 727  osd_zoom_labels(cairo_t *cr, gint x, gin
727      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);      cairo_line_to (cr, x + Z_RIGHT + Z_LEN, y + Z_MID);
728  }  }
729    
730  static float pixel2m(OsmGpsMap *map, int pixel) {  static char *
731    return pixel*osm_gps_map_get_scale(OSM_GPS_MAP(map));  dist_str_metric(int dist)
732    {
733        if(dist<1000)
734            return g_strdup_printf("%u m",  dist);
735    
736        return g_strdup_printf("%u km", dist/1000);
737  }  }
738    
739  static void  static void
740  osd_render_scale(osm_gps_map_osd_t *osd)  osd_render_scale(osm_gps_map_osd_t *osd)
741  {  {
742      osd_priv_t *priv = (osd_priv_t*)osd->priv;      osd_priv_t *priv = (osd_priv_t*)osd->priv;
743        float m_per_pix = osm_gps_map_get_scale(OSM_GPS_MAP(osd->widget));
744    
745      /* first fill with transparency */      /* first fill with transparency */
746      cairo_t *cr = cairo_create(priv->scale);      cairo_t *cr = cairo_create(priv->scale);
747      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);      cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
748      //    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);
749      cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2);      //    cairo_set_source_rgba(cr, 1.0, 0.0, 0.0, 0.2);
750      cairo_paint(cr);      cairo_paint(cr);
751      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);      cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
752    
753      /* determine the size of the scale width in meters */      /* determine the size of the scale width in meters */
754      float width = pixel2m(OSM_GPS_MAP(osd->widget), OSD_SCALE_W);      float width = (OSD_SCALE_W-2) * m_per_pix;
755      printf("width = %f meters\n", width);      printf("width = %f meters\n", width);
756    
757      /* scale this to useful values */      /* scale this to useful values */
# Line 754  osd_render_scale(osm_gps_map_osd_t *osd) Line 759  osd_render_scale(osm_gps_map_osd_t *osd)
759      int mant = width/pow(10,exp);      int mant = width/pow(10,exp);
760      printf("mant = %d, exp = %d \n", mant, exp);      printf("mant = %d, exp = %d \n", mant, exp);
761    
762        int width_metric = mant * pow(10,exp);
763        char *dist_str = dist_str_metric(width_metric);
764        width_metric /= m_per_pix;
765        printf("metric scale width = %d pixels: %s\n", width_metric, dist_str);
766    
767        int font_size = 12;
768    
769        cairo_select_font_face (cr, "Sans",
770                                CAIRO_FONT_SLANT_NORMAL,
771                                CAIRO_FONT_WEIGHT_BOLD);
772        cairo_set_font_size (cr, font_size);
773        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
774    
775        cairo_text_extents_t extents;
776        cairo_text_extents (cr, dist_str, &extents);
777    
778        cairo_set_source_rgb(cr, 1.0, 1.0, 1.0);
779        cairo_move_to (cr, font_size/3, font_size);
780        cairo_text_path (cr, dist_str);
781        cairo_set_line_width (cr, 2);
782        cairo_stroke (cr);
783    
784        cairo_set_source_rgb(cr, 0.0, 0.0, 0.0);
785        cairo_move_to (cr, font_size/3, font_size);
786        cairo_show_text (cr, dist_str);
787    
788        /* draw white line */
789        cairo_set_line_cap  (cr, CAIRO_LINE_CAP_ROUND);
790        cairo_set_source_rgba(cr, 1.0, 1.0, 1.0, 1.0);
791        cairo_set_line_width (cr, 4);
792        cairo_move_to (cr, 2, 2*font_size/3);
793        cairo_rel_line_to (cr, 0,  2*font_size/3);
794        cairo_rel_line_to (cr, width_metric, 0);
795        cairo_rel_line_to (cr, 0, -2*font_size/3);
796        cairo_stroke(cr);
797    
798        /* draw black line */
799        cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 1.0);
800        cairo_set_line_width (cr, 2);
801        cairo_move_to (cr, 2, 2*font_size/3);
802        cairo_rel_line_to (cr, 0,  2*font_size/3);
803        cairo_rel_line_to (cr, width_metric, 0);
804        cairo_rel_line_to (cr, 0, -2*font_size/3);
805        cairo_stroke(cr);
806    
807        /* xyz */
808    
809      cairo_destroy(cr);      cairo_destroy(cr);
810  }  }
811    
# Line 872  osd_draw(osm_gps_map_osd_t *osd, GdkDraw Line 924  osd_draw(osm_gps_map_osd_t *osd, GdkDraw
924  #ifdef OSD_SCALE  #ifdef OSD_SCALE
925          priv->scale =          priv->scale =
926              cairo_image_surface_create(CAIRO_FORMAT_ARGB32,              cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
927                                         OSD_SCALE_W, OSD_SCALE_H);                                         OSD_SCALE_W+2, OSD_SCALE_H+2);
928  #endif  #endif
929    
930          /* ... and render it */          /* ... and render it */
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