- if (kv == GDK_Left || kv == GDK_h) gis_viewer_pan(viewer, 0, -pan, 0);
- else if (kv == GDK_Down || kv == GDK_j) gis_viewer_pan(viewer, -pan, 0, 0);
- else if (kv == GDK_Up || kv == GDK_k) gis_viewer_pan(viewer, pan, 0, 0);
- else if (kv == GDK_Right || kv == GDK_l) gis_viewer_pan(viewer, 0, pan, 0);
- else if (kv == GDK_minus || kv == GDK_o) gis_viewer_zoom(viewer, 10./9);
- else if (kv == GDK_plus || kv == GDK_i) gis_viewer_zoom(viewer, 9./10);
- else if (kv == GDK_H) gis_viewer_rotate(viewer, 0, 0, -2);
- else if (kv == GDK_J) gis_viewer_rotate(viewer, 2, 0, 0);
- else if (kv == GDK_K) gis_viewer_rotate(viewer, -2, 0, 0);
- else if (kv == GDK_L) gis_viewer_rotate(viewer, 0, 0, 2);
+ switch (event->keyval) {
+ case GDK_Left: case GDK_h: gis_viewer_pan(viewer, 0, -pan, 0); break;
+ case GDK_Down: case GDK_j: gis_viewer_pan(viewer, -pan, 0, 0); break;
+ case GDK_Up: case GDK_k: gis_viewer_pan(viewer, pan, 0, 0); break;
+ case GDK_Right: case GDK_l: gis_viewer_pan(viewer, 0, pan, 0); break;
+ case GDK_minus: case GDK_o: gis_viewer_zoom(viewer, 10./9); break;
+ case GDK_plus: case GDK_i: gis_viewer_zoom(viewer, 9./10); break;
+ case GDK_H: gis_viewer_rotate(viewer, 0, 0, -2); break;
+ case GDK_J: gis_viewer_rotate(viewer, 2, 0, 0); break;
+ case GDK_K: gis_viewer_rotate(viewer, -2, 0, 0); break;
+ case GDK_L: gis_viewer_rotate(viewer, 0, 0, 2); break;
+ }
+ return FALSE;
+}
+
+static gboolean on_scroll(GisViewer *viewer, GdkEventScroll *event, gpointer _)
+{
+ switch (event->direction) {
+ case GDK_SCROLL_DOWN: gis_viewer_zoom(viewer, 10./9); break;
+ case GDK_SCROLL_UP: gis_viewer_zoom(viewer, 9./10); break;
+ default: break;
+ }