+int resize_graphical_handler(Con *first, Con *second, orientation_t orientation, const xcb_button_press_event_t *event) {
+ DLOG("resize handler\n");
+
+ /* TODO: previously, we were getting a rect containing all screens. why? */
+ 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;
+ if (orientation == HORIZ) {
+ helprect.x = second->rect.x;
+ helprect.y = second->rect.y;
+ 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.x = second->rect.x;
+ helprect.y = second->rect.y;
+ 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 0;
+
+ int pixels = (new_position - initial_position);
+
+ DLOG("Done, pixels = %d\n", pixels);
+
+ // if we got thus far, the containers must have
+ // percentages associated with them
+ assert(first->percent > 0.0);
+ assert(second->percent > 0.0);
+
+ // calculate the new percentage for the first container
+ double new_percent, difference;
+ double percent = first->percent;
+ DLOG("percent = %f\n", percent);
+ int original = (orientation == HORIZ ? first->rect.width : first->rect.height);
+ DLOG("original = %d\n", original);
+ new_percent = (original + pixels) * (percent / original);
+ difference = percent - new_percent;
+ DLOG("difference = %f\n", difference);
+ DLOG("new percent = %f\n", new_percent);
+ first->percent = new_percent;
+
+ // calculate the new percentage for the second container
+ double s_percent = second->percent;
+ second->percent = s_percent + difference;
+ DLOG("second->percent = %f\n", second->percent);
+
+ // now we must make sure that the sum of the percentages remain 1.0
+ con_fix_percent(first->parent);
+
+ return 0;