if (button == LEFT_BUTTON || button == RIGHT_BUTTON) {
if (!INGRID(state, gx, gy)) return NULL;
ui->cur_visible = 0;
- if ((ggrid & G_ISLAND) && !(ggrid & G_MARK)) {
+ if (ggrid & G_ISLAND) {
ui->dragx_src = gx;
ui->dragy_src = gy;
return "";
} else
return ui_cancel_drag(ui);
} else if (button == LEFT_DRAG || button == RIGHT_DRAG) {
- if (gx != ui->dragx_src || gy != ui->dragy_src) {
+ if (INGRID(state, ui->dragx_src, ui->dragy_src)
+ && (gx != ui->dragx_src || gy != ui->dragy_src)
+ && !(GRID(state,ui->dragx_src,ui->dragy_src) & G_MARK)) {
ui->dragging = 1;
ui->drag_is_noline = (button == RIGHT_DRAG) ? 1 : 0;
return update_drag_dst(state, ui, ds, x, y);
if (ui->dragging) {
return finish_drag(state, ui);
} else {
+ if (!INGRID(state, ui->dragx_src, ui->dragy_src)
+ || gx != ui->dragx_src || gy != ui->dragy_src) {
+ return ui_cancel_drag(ui);
+ }
ui_cancel_drag(ui);
if (!INGRID(state, gx, gy)) return NULL;
if (!(GRID(state, gx, gy) & G_ISLAND)) return NULL;