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Fix map scrolling

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The osm-gps-map default is to scroll-and-recenter around the mouse position.
That is BAT SHIT CRAZY. So this implements our own scroll handling instead.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>
This commit is contained in:
Dirk Hohndel 2013-01-20 20:23:50 -08:00
parent 3d248682ee
commit 97ce7a3763
1 changed files with 15 additions and 0 deletions
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15
gps.c
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@ -24,6 +24,20 @@ static void on_close (GtkWidget *widget, gpointer user_data)
*window = NULL;
}
/* the osm gps map default is to scroll-and-recenter around the mouse position
* that is BAT SHIT CRAZY.
* So let's do our own scroll handling instead */
static gboolean scroll_cb(GtkWidget *widget, GdkEventScroll *event, gpointer data)
{
OsmGpsMap *map = (OsmGpsMap *)widget;
if (event->direction == GDK_SCROLL_UP)
osm_gps_map_zoom_in(map);
else if (event->direction == GDK_SCROLL_DOWN)
osm_gps_map_zoom_out(map);
/* don't allow the insane default handler to get its hands on this event */
return TRUE;
}
static void add_gps_point(OsmGpsMap *map, float latitude, float longitude)
{
OsmGpsMapTrack * track = osm_gps_map_track_new ();
@ -82,6 +96,7 @@ void show_map(OsmGpsMap *map, GtkWidget **window)
GTK_WINDOW(*window)->allow_shrink = TRUE;
gtk_container_add(GTK_CONTAINER (*window), GTK_WIDGET(map));
g_signal_connect(*window, "destroy", G_CALLBACK (on_close), (gpointer)window);
g_signal_connect(G_OBJECT(map), "scroll-event", G_CALLBACK(scroll_cb), NULL);
}
gtk_widget_show_all(*window);
gtk_window_present(GTK_WINDOW(*window));