Request: Fix middle click dragging

[lah7]

What should be patched?

GTK 3.20 onwards broke the ability to use the middle mouse button for dragging. Currently, it behaves as a left click drag regardless.

For example, in MATE's Caja, dragging a file using the middle mouse button (e.g. between tabs) would show a context menu "Move here, copy here". Now it always behaves like a left button drag and would copy/move the files instead.

References

• [GTK+ 3.20/22/24] Dragging files with the third mouse button does not work as expected mate-desktop/caja#753
• https://gitlab.gnome.org/GNOME/gtk/-/issues/1512

According to the GTK issue 1512 on GitLab, the problematic commit begins at: https://gitlab.gnome.org/GNOME/gtk/-/commit/e4f5e31b8baf5addc28ccb68b1b6d88f8f8ed5df

[lah7]

Just to clean up issues: Personally, I rely on the keyboard shortcuts (CTRL+/SHIFT) and drag the file to move/copy/link. At least this works across GTK, KDE and Windows. Middle click dragging isn't a thing in KDE's Dolphin file manager.

Ultimately, not bothered (as OP) if this is fixed, but will keep the issue open as it is something GTK broke.