X-Git-Url: https://git.street.me.uk/andy/viking.git/blobdiff_plain/04f36d9233f93ea0412e072214c6c49ede480709..00de8de3e9c61db157855abdc793c403ab24ab0e:/src/vikviewport.h

diff --git a/src/vikviewport.h b/src/vikviewport.h
index eca466fb..14136453 100644
--- a/src/vikviewport.h
+++ b/src/vikviewport.h
@@ -36,11 +36,11 @@ G_BEGIN_DECLS
 #define VIK_VIEWPORT_TYPE            (vik_viewport_get_type ())
 #define VIK_VIEWPORT(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), VIK_VIEWPORT_TYPE, VikViewport))
 #define VIK_VIEWPORT_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), VIK_VIEWPORT_TYPE, VikViewportClass))
-#define IS_VIK_VIEWPORT(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), VIK_VIEWPORT_TYPE))
-#define IS_VIK_VIEWPORT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), VIK_VIEWPORT_TYPE))
+#define VIK_IS_VIEWPORT(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), VIK_VIEWPORT_TYPE))
+#define VIK_IS_VIEWPORT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), VIK_VIEWPORT_TYPE))
 
 #define VIK_VIEWPORT_MAX_ZOOM 32768.0
-#define VIK_VIEWPORT_MIN_ZOOM 0.125
+#define VIK_VIEWPORT_MIN_ZOOM (1 / 32.0)
 
 /* used for coord to screen etc, screen to coord */
 #define VIK_VIEWPORT_UTM_WRONG_ZONE -9999999
@@ -54,6 +54,7 @@ typedef struct _VikViewportClass VikViewportClass;
 struct _VikViewportClass
 {
   GtkDrawingAreaClass drawing_area_class;
+  void (*updated_center) (VikViewport *vw);
 };
 GType vik_viewport_get_type ();
 
@@ -82,16 +83,20 @@ void vik_viewport_zoom_out ( VikViewport *vvp );
 
 /* viewport position */
 const VikCoord *vik_viewport_get_center ( VikViewport *vvp );
-void vik_viewport_set_center_coord ( VikViewport *vvp, const VikCoord *coord );
+void vik_viewport_set_center_coord ( VikViewport *vvp, const VikCoord *coord, gboolean save_position );
 void vik_viewport_set_center_screen ( VikViewport *vvp, int x, int y );
 void vik_viewport_center_for_zonen ( VikViewport *vvp, struct UTM *center, int zone);
 gchar vik_viewport_leftmost_zone ( VikViewport *vvp );
 gchar vik_viewport_rightmost_zone ( VikViewport *vvp );
-void vik_viewport_set_center_utm ( VikViewport *vvp, const struct UTM *utm );
-void vik_viewport_set_center_latlon ( VikViewport *vvp, const struct LatLon *ll );
+void vik_viewport_set_center_utm ( VikViewport *vvp, const struct UTM *utm, gboolean save_position );
+void vik_viewport_set_center_latlon ( VikViewport *vvp, const struct LatLon *ll, gboolean save_position );
 void vik_viewport_corners_for_zonen ( VikViewport *vvp, int zone, VikCoord *ul, VikCoord *br );
 void vik_viewport_get_min_max_lat_lon ( VikViewport *vp, gdouble *min_lat, gdouble *max_lat, gdouble *min_lon, gdouble *max_lon );
 
+gboolean vik_viewport_go_back ( VikViewport *vvp );
+gboolean vik_viewport_go_forward ( VikViewport *vvp );
+gboolean vik_viewport_back_available ( const VikViewport *vvp );
+gboolean vik_viewport_forward_available ( const VikViewport *vvp );
 
 /* drawmode management */
 typedef enum {
@@ -179,7 +184,8 @@ void vik_viewport_draw_arc ( VikViewport *vvp, GdkGC *gc, gboolean filled, gint
 void vik_viewport_draw_polygon ( VikViewport *vvp, GdkGC *gc, gboolean filled, GdkPoint *points, gint npoints );
 void vik_viewport_draw_layout ( VikViewport *vvp, GdkGC *gc, gint x, gint y, PangoLayout *layout );
 
-
+/* Utilities */
+void vik_viewport_compute_bearing ( VikViewport *vp, gint x1, gint y1, gint x2, gint y2, gdouble *angle, gdouble *baseangle );
 
 G_END_DECLS