+float ZWindowCanvas::get_auto_zoom()
+{
+ EDL *edl = gui->zwindow->edl;
+ if( !edl ) edl = mwindow->edl;
+ float conformed_w, conformed_h;
+ edl->calculate_conformed_dimensions(0, conformed_w, conformed_h);
+ BC_WindowBase *window = get_canvas();
+ int cw = window ? window->get_w() : w;
+ int ch = window ? window->get_h() : h;
+ float zoom_x = cw / conformed_w;
+ float zoom_y = ch / conformed_h;
+ return zoom_x < zoom_y ? zoom_x : zoom_y;
+}
+
+float ZWindowCanvas::get_zoom()
+{
+ return gui->zwindow->zoom;
+}
+void ZWindowCanvas::update_zoom(int x, int y, float zoom)
+{
+ gui->zwindow->zoom = zoom;
+}
+
+void ZWindowCanvas::zoom_auto()
+{
+ EDL *edl = gui->zwindow->edl;
+ if( !edl ) edl = mwindow->edl;
+ set_zoom(edl, 0);
+}
+
+void ZWindowCanvas::zoom_resize_window(float zoom)
+{
+ if( !zoom ) zoom = get_auto_zoom();
+ EDL *edl = gui->zwindow->edl;
+ if( !edl ) edl = mwindow->edl;
+ int ow = edl->session->output_w, oh = edl->session->output_h;
+ int canvas_w, canvas_h;
+ calculate_sizes(mwindow->edl->get_aspect_ratio(), ow, oh,
+ zoom, canvas_w, canvas_h);
+ int new_w = canvas_w + xS(20);
+ int new_h = canvas_h + yS(20);
+ gui->resize_window(new_w, new_h);
+ gui->resize_event(new_w, new_h);
+}