mwindow->cwindow->gui->lock_window("TrackCanvas::render_handle_frame 0");
Canvas *canvas = mwindow->cwindow->gui->canvas;
float ox1, oy1, ox2, oy2, cx1, cy1, cx2, cy2;
mwindow->cwindow->gui->lock_window("TrackCanvas::render_handle_frame 0");
Canvas *canvas = mwindow->cwindow->gui->canvas;
float ox1, oy1, ox2, oy2, cx1, cy1, cx2, cy2;