Document Fix #1947260

[andy/viking.git] / src / vikviewport.c

diff --git a/src/vikviewport.c b/src/vikviewport.c
index 8f648ba1b4981ee34f0263127b139685d164648b..fd2ea74b410697306ec28fd10afb2303feb3fa9d 100644 (file)
--- a/src/vikviewport.c
+++ b/src/vikviewport.c
@@ -28,7 +28,6 @@
 
 #include <gtk/gtk.h>
 #include <math.h>
-#include <stdio.h>
 
 #include "coords.h"
 #include "vikcoord.h"
@@ -90,6 +89,11 @@ struct _VikViewport {
   gdouble google_calcy_fact;
   gdouble google_calcx_rev_fact;
   gdouble google_calcy_rev_fact;
+
+  /* trigger stuff */
+  gpointer trigger;
+  GdkPixmap *snapshot_buffer;
+  gboolean half_drawn;
 };
 
 static gdouble
@@ -175,7 +179,14 @@ static void viewport_init ( VikViewport *vvp )
   vvp->scale_bg_gc = NULL;
   vvp->draw_scale = TRUE;
   vvp->draw_centermark = TRUE;
+
+  vvp->trigger = NULL;
+  vvp->snapshot_buffer = NULL;
+  vvp->half_drawn = FALSE;
+
   g_signal_connect (G_OBJECT(vvp), "configure_event", G_CALLBACK(vik_viewport_configure), NULL);
+
+  GTK_WIDGET_SET_FLAGS(vvp, GTK_CAN_FOCUS); /* allow VVP to have focus -- enabling key events, etc */
 }
 
 GdkColor *vik_viewport_get_background_gdkcolor ( VikViewport *vvp )
@@ -237,6 +248,11 @@ void vik_viewport_configure_manually ( VikViewport *vvp, gint width, guint heigh
   if ( vvp->scr_buffer )
     g_object_unref ( G_OBJECT ( vvp->scr_buffer ) );
   vvp->scr_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 );
+
+  /* TODO trigger: only if this is enabled !!! */
+  if ( vvp->snapshot_buffer )
+    g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) );
+  vvp->snapshot_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 );
 }
 
 
@@ -257,6 +273,13 @@ gboolean vik_viewport_configure ( VikViewport *vvp )
 
   vvp->scr_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 );
 
+  /* TODO trigger: only if enabled! */
+  if ( vvp->snapshot_buffer )
+    g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) );
+
+  vvp->snapshot_buffer = gdk_pixmap_new ( GTK_WIDGET(vvp)->window, vvp->width, vvp->height, -1 );
+  /* TODO trigger */
+
   /* this is down here so it can get a GC (necessary?) */
   if ( ! vvp->background_gc )
   {
@@ -279,6 +302,9 @@ static void viewport_finalize ( GObject *gob )
   if ( vvp->scr_buffer )
     g_object_unref ( G_OBJECT ( vvp->scr_buffer ) );
 
+  if ( vvp->snapshot_buffer )
+    g_object_unref ( G_OBJECT ( vvp->snapshot_buffer ) );
+
   if ( vvp->alpha_pixbuf )
     g_object_unref ( G_OBJECT ( vvp->alpha_pixbuf ) );
 
@@ -1009,6 +1035,37 @@ static void viewport_google_rezoom ( VikViewport *vvp )
   vvp->google_calcy_rev_fact = 1 / vvp->google_calcy_fact;
 }
 
+/******** triggering *******/
+void vik_viewport_set_trigger ( VikViewport *vp, gpointer trigger )
+{
+  vp->trigger = trigger;
+}
+
+gpointer vik_viewport_get_trigger ( VikViewport *vp )
+{
+  return vp->trigger;
+}
+
+void vik_viewport_snapshot_save ( VikViewport *vp )
+{
+  gdk_draw_drawable ( vp->snapshot_buffer, vp->background_gc, vp->scr_buffer, 0, 0, 0, 0, -1, -1 );
+}
+
+void vik_viewport_snapshot_load ( VikViewport *vp )
+{
+  gdk_draw_drawable ( vp->scr_buffer, vp->background_gc, vp->snapshot_buffer, 0, 0, 0, 0, -1, -1 );
+}
+
+void vik_viewport_set_half_drawn(VikViewport *vp, gboolean half_drawn)
+{
+  vp->half_drawn = half_drawn;
+}
+
+gboolean vik_viewport_get_half_drawn( VikViewport *vp )
+{
+  return vp->half_drawn;
+}
+
 
 const gchar *vik_viewport_get_drawmode_name(VikViewport *vv, VikViewportDrawMode mode)
  {