Comment 16 for bug 1212736

The click and hold to simulate a right click used to send the virtual right click before button release until march 2010. Changes in the X server forced the mousetweaks developer to move the virtual right click after the button release because as far as I understand, the X server stopped accepting virtual right clicks if the left mouse button had not been released. I don't know how the current X server would behave about this.

Anyway, as far as I have been told, a real right click simulation by a left click and hold should probably be implemented at a deeper layer than mousetweaks. Another aspect for example making problems is that mousetweaks is not able to discard the real left button down before creating the virtual right click. One of the consequences is that it is not possible to perform a virtual right click on a multiple selection as the real left mouse click preceding the virtual right click deselects the items.

By the way, mousetweaks tried to implement some kind of feedback to indicate when the user has hold the left mouse button long enough to issue the simulated right click: the pointer should fill up with a different color. However, this does not work reliably.