void glmotion_zoom_inc(int zoomin)
{
float inc_value;
inc_value =
(float) (view->Topview->fitin_zoom * MAX_ZOOM * -1 -
view->Topview->fitin_zoom * MIN_ZOOM * -1) / ZOOM_STEPS;
if (zoomin) /*zooming in , zoom value should be decreased */
graph_zoom(view->zoom - view->zoom * 0.25);
else
graph_zoom(view->zoom + view->zoom * 0.25); /*zoom out */
glexpose();
}
void glmotion_zoom(ViewInfo * v)
{
float real_zoom;
if (view->active_camera == -1) {
real_zoom =
view->zoom + view->mouse.dragX / 10 * (view->zoom * -1 / 20);
} else {
real_zoom =
(view->cameras[view->active_camera]->r +
view->mouse.dragX / 10 * (view->cameras[view->active_camera]->r /
20)) * -1;
}
graph_zoom(real_zoom);
}
static void on_zoom_in_clicked(GtkWidget *button, gpointer data) {
GtkWidget *graph = GTK_WIDGET(data);
graph_zoom(graph, +1);
set_buttons(graph);
}
