ControlGetFocus() prevents double-clicks

[MarcoM]

It seems that polling which control has the focus with ControlGetFocus() resets somehow the mouse click counter/timer...

Here is a code sample showing this:

While 1
$CurrentWin = WinGetHandle("[Active]")
$CurrentControl = ControlGetFocus ($CurrentWin)
Sleep(50)
Wend

Double-clicks are not detected anymore when this code is running.

[Valik]

This can't be fixed. It's a quirk of windows that when getting focus the input state is reset (keyboard state, mouse state, et cetera). You can still double-click, you just now have to do it faster than the polling interval since it's going to reset the mouse input each time.

Closing as won't fix because while it is undesirable behavior it can't be fixed since it's a Windows design problem.

[MarcoM]

As a workaround, you can test for the left click and if it is pressed, wait a little longer than the double-click maximal interval before getting focus information. That will avoid resetting input events and still allow high frequency focus polling.

Here is an example of the workaround code:

#include <Misc.au3>
$DoubleClickPeriod = RegRead("HKCU\Control Panel\Mouse", "DoubleClickSpeed")
While 1
	$CurrentWin = WinGetHandle("[Active]")
	If _IsPressed("01", "user32.dll") Then
		Sleep($DoubleClickPeriod+50)
	Else
		$CurrentControl = ControlGetFocus ($CurrentWin)
		Sleep(10)
	EndIf
Wend