[Wayland] Drag and drop not working

[Phillipus]

Archi 4.8.1 Ubuntu 20.4 with Wayland

Drag and drop from the Models Tree, the Navigator, and Properties to a View is not working.

• In ArchimateDiagramTransferDropTargetListener#updateTargetRequest(), CanvasDiagramTransferDropTargetListener#updateTargetRequest() and SketchDiagramTransferDropTargetListener#updateTargetRequest()we are changing the event detail to DND.DROP_LINK in order to show a link type mouse cursor during DnD
• Wayland is not reacting to this and so DnD doesn't register

We can workaround this by removing this line in 3 places:

getCurrentEvent().detail = DND.DROP_LINK; // Show link cursor

However:

• Pressing the modifier key (Ctrl) during the DnD operation has no effect on the event detail so we are not able to determine if this is a Copy or Move DnD operation for whether to add connections
• Sometimes this can work If the Ctrl key is pressed before starting the DnD and dragging the mouse outside of Archi before dropping (but not always!)

[Phillipus]

Pressing the modifier key (Ctrl) during the DnD operation has no effect on the event detail so we are not able to determine if this is a Copy or Move DnD operation for whether to add connections

Seems this is the case in all DnD operations in Eclipse under Wayland.

Opened a bug - https://bugs.eclipse.org/bugs/show_bug.cgi?id=572615

[Phillipus]

Fixed