+void resize_graphical_handler(Con *first, Con *second, orientation_t orientation, const xcb_button_press_event_t *event) {
+ Con *output = con_get_output(first);
+ DLOG("x = %d, width = %d\n", output->rect.x, output->rect.width);
+
+ x_mask_event_mask(~XCB_EVENT_MASK_ENTER_WINDOW);
+ xcb_flush(conn);
+
+ uint32_t mask = 0;
+ uint32_t values[2];
+
+ mask = XCB_CW_OVERRIDE_REDIRECT;
+ values[0] = 1;
+
+ /* Open a new window, the resizebar. Grab the pointer and move the window
+ * around as the user moves the pointer. */
+ xcb_window_t grabwin = create_window(conn, output->rect, XCB_COPY_FROM_PARENT, XCB_COPY_FROM_PARENT,
+ XCB_WINDOW_CLASS_INPUT_ONLY, XCURSOR_CURSOR_POINTER, true, mask, values);
+
+ /* Keep track of the coordinate orthogonal to motion so we can determine the
+ * length of the resize afterward. */
+ uint32_t initial_position, new_position;
+
+ /* Configure the resizebar and snap the pointer. The resizebar runs along
+ * the rect of the second con and follows the motion of the pointer. */
+ Rect helprect;
+ helprect.x = second->rect.x;
+ helprect.y = second->rect.y;
+ if (orientation == HORIZ) {
+ helprect.width = logical_px(2);
+ helprect.height = second->rect.height;
+ initial_position = second->rect.x;
+ xcb_warp_pointer(conn, XCB_NONE, event->root, 0, 0, 0, 0,
+ second->rect.x, event->root_y);
+ } else {
+ helprect.width = second->rect.width;
+ helprect.height = logical_px(2);
+ initial_position = second->rect.y;
+ xcb_warp_pointer(conn, XCB_NONE, event->root, 0, 0, 0, 0,
+ event->root_x, second->rect.y);
+ }
+
+ mask = XCB_CW_BACK_PIXEL;
+ values[0] = config.client.focused.border.colorpixel;
+
+ mask |= XCB_CW_OVERRIDE_REDIRECT;
+ values[1] = 1;
+
+ xcb_window_t helpwin = create_window(conn, helprect, XCB_COPY_FROM_PARENT, XCB_COPY_FROM_PARENT,
+ XCB_WINDOW_CLASS_INPUT_OUTPUT, (orientation == HORIZ ? XCURSOR_CURSOR_RESIZE_HORIZONTAL : XCURSOR_CURSOR_RESIZE_VERTICAL), true, mask, values);
+
+ xcb_circulate_window(conn, XCB_CIRCULATE_RAISE_LOWEST, helpwin);
+
+ xcb_flush(conn);
+
+ /* `new_position' will be updated by the `resize_callback'. */
+ new_position = initial_position;
+
+ const struct callback_params params = {orientation, output, helpwin, &new_position};
+
+ /* `drag_pointer' blocks until the drag is completed. */
+ drag_result_t drag_result = drag_pointer(NULL, event, grabwin, BORDER_TOP, 0, resize_callback, ¶ms);
+
+ xcb_destroy_window(conn, helpwin);
+ xcb_destroy_window(conn, grabwin);
+ xcb_flush(conn);
+
+ /* User cancelled the drag so no action should be taken. */
+ if (drag_result == DRAG_REVERT) {
+ return;
+ }
+
+ int pixels = (new_position - initial_position);
+ DLOG("Done, pixels = %d\n", pixels);
+
+ /* if we got thus far, the containers must have valid percentages. */
+ assert(first->percent > 0.0);
+ assert(second->percent > 0.0);
+ const bool result = resize_neighboring_cons(first, second, pixels, 0);
+ DLOG("Graphical resize %s: first->percent = %f, second->percent = %f.\n",
+ result ? "successful" : "failed", first->percent, second->percent);