xdg_toplevel_drag_v1

# xdg_toplevel_drag_manager_v1

This protocol enhances normal drag and drop with the ability to move a window at the same time. This allows having detachable parts of a window that when dragged out of it become a new window and can be dragged over an existing window to be reattached. A typical workflow would be when the user starts dragging on top of a detachable part of a window, the client would create a wl_data_source and a xdg_toplevel_drag_v1 object and start the drag as normal via wl_data_device.start_drag. Once the client determines that the detachable window contents should be detached from the originating window, it creates a new xdg_toplevel with these contents and issues a xdg_toplevel_drag_v1.attach request before mapping it. From now on the new window is moved by the compositor during the drag as if the client called xdg_toplevel.move. Dragging an existing window is similar. The client creates a xdg_toplevel_drag_v1 object and attaches the existing toplevel before starting the drag. Clients use the existing drag and drop mechanism to detect when a window can be docked or undocked. If the client wants to snap a window into a parent window it should delete or unmap the dragged top-level. If the contents should be detached again it attaches a new toplevel as described above. If a drag operation is cancelled without being dropped, clients should revert to the previous state, deleting any newly created windows as appropriate. When a drag operation ends as indicated by wl_data_source.dnd_drop_performed the dragged toplevel window's final position is determined as if a xdg_toplevel_move operation ended. Warning! The protocol described in this file is currently in the testing phase. Backward compatible changes may be added together with the corresponding interface version bump. Backward incompatible changes can only be done by creating a new major version of the extension.

Requests
- #
  destroy
  
  destroy the xdg_toplevel_drag_manager_v1 object
  
  void xdg_toplevel_drag_manager_v1_destroy(
  struct xdg_toplevel_drag_manager_v1* xdg_toplevel_drag_manager_v1
  )
  
  Destroy this xdg_toplevel_drag_manager_v1 object. Other objects, including xdg_toplevel_drag_v1 objects created by this factory, are not affected by this request.
- #
  get_xdg_toplevel_drag
  
  get an xdg_toplevel_drag for a wl_data_source
  
  struct xdg_toplevel_drag_v1* xdg_toplevel_drag_manager_v1_get_xdg_toplevel_drag(
  struct xdg_toplevel_drag_manager_v1* xdg_toplevel_drag_manager_v1,
  
  struct wl_data_source* data_source
  )
  
  Create an xdg_toplevel_drag for a drag and drop operation that is going to be started with data_source. This request can only be made on sources used in drag-and-drop, so it must be performed before wl_data_device.start_drag. Attempting to use the source other than for drag-and-drop such as in wl_data_device.set_selection will raise an invalid_source error. Destroying data_source while a toplevel is attached to the xdg_toplevel_drag is undefined.
Enums
- #
  error
  
  XDG_TOPLEVEL_DRAG_MANAGER_V1_ERROR_INVALID_SOURCE /* data_source already used for toplevel drag */
# xdg_toplevel_drag_v1

Requests
- #
  destroy
  
  destroy an xdg_toplevel_drag_v1 object
  
  void xdg_toplevel_drag_v1_destroy(
  struct xdg_toplevel_drag_v1* xdg_toplevel_drag_v1
  )
  
  Destroy this xdg_toplevel_drag_v1 object. This request must only be called after the underlying wl_data_source drag has ended, as indicated by the dnd_drop_performed or cancelled events. In any other case an ongoing_drag error is raised.
- #
  attach
  
  Move a toplevel with the drag operation
  
  void xdg_toplevel_drag_v1_attach(
  struct xdg_toplevel_drag_v1* xdg_toplevel_drag_v1,
  
  struct xdg_toplevel* toplevel,
  
  int32_t x_offset, /* dragged surface x offset */
  
  int32_t y_offset /* dragged surface y offset */
  )
  
  Request that the window will be moved with the cursor during the drag operation. The offset is a hint to the compositor how the toplevel should be positioned relative to the cursor hotspot in surface local coordinates. For example it might only be used when an unmapped window is attached. The attached window does not participate in the selection of the drag target. If the toplevel is unmapped while it is attached, it is automatically detached from the drag. In this case this request has to be called again if the window should be attached after it is remapped. This request can be called multiple times but issuing it while a toplevel with an active role is attached raises a toplevel_attached error.
Enums
- #
  error
  
  XDG_TOPLEVEL_DRAG_V1_ERROR_TOPLEVEL_ATTACHED /* valid toplevel already attached */
  
  XDG_TOPLEVEL_DRAG_V1_ERROR_ONGOING_DRAG /* drag has not ended */

Copyright Info

Copyright 2023 David Redondo Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice (including the next paragraph) shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

xdg_toplevel_drag_v1

# xdg_toplevel_drag_manager_v1

Requests

Enums