Add cursor support to GritsObject

[grits] / src / grits-viewer.c

diff --git a/src/grits-viewer.c b/src/grits-viewer.c
index 08d73bbf29c45ea2d748aa903e4475d144513ada..92f6e863617940792d2c532074218ef82110bb1b 100644 (file)
--- a/src/grits-viewer.c
+++ b/src/grits-viewer.c
@@ -163,9 +163,9 @@ static gboolean on_motion_notify(GritsViewer *viewer, GdkEventMotion *event, gpo
        gdouble lat, lon, elev, scale, rx, ry, rz;
        grits_viewer_get_location(GRITS_VIEWER(viewer), &lat, &lon, &elev);
        grits_viewer_get_rotation(GRITS_VIEWER(viewer), &rx,  &ry,  &rz);
-       scale = (elev/EARTH_R/15) * (sin(deg2rad(ABS(rx)))*4+1);
+       scale = (elev/EARTH_R/14.1) * (sin(deg2rad(ABS(rx)))*4+1);
        switch (viewer->drag_mode) {
-       case GRITS_DRAG_PAN:  grits_viewer_pan(viewer, -y*scale, x*scale, 0); break;
+       case GRITS_DRAG_PAN:  grits_viewer_pan(viewer, -y*scale*0.782, x*scale, 0); break;
        case GRITS_DRAG_ZOOM: grits_viewer_zoom(viewer, pow(2, -y/500)); break;
        case GRITS_DRAG_TILT: grits_viewer_rotate(viewer, y/10, 0, x/10); break;
        }
@@ -180,13 +180,6 @@ static void on_view_changed(GritsViewer *viewer,
        gtk_widget_queue_draw(GTK_WIDGET(viewer));
 }
 
-static void on_realize(GritsViewer *viewer)
-{
-       GdkCursor *cursor = gdk_cursor_new(GDK_FLEUR);
-       GdkWindow *window = gtk_widget_get_window(GTK_WIDGET(viewer));
-       gdk_window_set_cursor(window, cursor);
-}
-
 /***********
  * Methods *
  ***********/
@@ -445,8 +438,8 @@ void grits_viewer_center_position(GritsViewer *viewer,
  * grits_viewer_project:
  * @viewer: the viewer
  * @lat:  the latitude
- * @lon:  the latitude
- * @elev: the latitude
+ * @lon:  the longitude
+ * @elev: the elevation
  * @px:   the project x coordinate
  * @py:   the project y coordinate
  * @pz:   the project z coordinate
@@ -465,6 +458,31 @@ void grits_viewer_project(GritsViewer *viewer,
        klass->project(viewer, lat, lon, elev, px, py, pz);
 }
 
+/**
+ * grits_viewer_unproject:
+ * @viewer: the viewer
+ * @x:    x coordinate in screen space
+ * @y:    y coordinate in screen space
+ * @z:    z coordinate in screen space, or -1 to use the value
+ *        from the depth buffer at x and y as the z value
+ * @lat:  the latitude
+ * @lon:  the longitude
+ * @elev: the elevation
+ *
+ * Project a x, y point in screen space to a latitude, longitude, and elevation
+ * point. Useful for finding the position of the cursor or another on-screen
+ * object in world coordinates.
+ */
+void grits_viewer_unproject(GritsViewer *viewer,
+               gdouble px, gdouble py, gdouble pz,
+               gdouble *lat, gdouble *lon, gdouble *elev)
+{
+       GritsViewerClass *klass = GRITS_VIEWER_GET_CLASS(viewer);
+       if (!klass->unproject)
+               g_warning("GritsViewer: unproject - Unimplemented");
+       klass->unproject(viewer, px, py, pz, lat, lon, elev);
+}
+
 /**
  * grits_viewer_clear_height_func:
  * @viewer: the viewer
@@ -562,7 +580,7 @@ static void grits_viewer_init(GritsViewer *viewer)
        viewer->time        = time(NULL);
        viewer->location[0] = 40;
        viewer->location[1] = -100;
-       viewer->location[2] = 1.5*EARTH_R;
+       viewer->location[2] = EARTH_R;
        viewer->rotation[0] = 0;
        viewer->rotation[1] = 0;
        viewer->rotation[2] = 0;
@@ -583,8 +601,6 @@ static void grits_viewer_init(GritsViewer *viewer)
 
        g_signal_connect(viewer, "location-changed",     G_CALLBACK(on_view_changed),   NULL);
        g_signal_connect(viewer, "rotation-changed",     G_CALLBACK(on_view_changed),   NULL);
-
-       g_signal_connect(viewer, "realize",              G_CALLBACK(on_realize),        NULL);
 }
 static void grits_viewer_finalize(GObject *gobject)
 {