How to detect CTRL being pressed in a GeDialog

C4DS

I am in a GeDialog and have a button that is by default disabled.
I want to enable it as long as CTRL key is being pressed.

C4DS

The following works in R20

Int32 MyDialog::Message(const BaseContainer& msg, BaseContainer& result)
{
	BaseContainer keyChannels;
	if (GetInputEvent(BFM_INPUT_KEYBOARD, keyChannels))
	{
		const Int32 qualifier = keyChannels.GetInt32(BFM_INPUT_QUALIFIER);
		ApplicationOutput("qualifier @", qualifier);
	}

It shows a value '2' when I press CTRL key, '0' when I let go.

But in R23 (and above), I don't get any output in console window.

m_adam

Hi @C4DS this has indeed changed, I will check with the UI team to know the exact reason. To retrieve qualifier I find out that only GetInputState is working, so in the meantime you can do this like that and it work as expected

    def Message(self, msg, result):
        res = c4d.BaseContainer()
        self.GetInputState(c4d.BFM_INPUT_KEYBOARD, c4d.QCTRL, res)

        if res[c4d.BFM_INPUT_QUALIFIER]:
            print(msg.GetId())
            isShiftPressed = bool(res[c4d.BFM_INPUT_QUALIFIER] & c4d.QSHIFT)
            isCtrlPressed = bool(res[c4d.BFM_INPUT_QUALIFIER] & c4d.QCTRL)
            isAltPressed = bool(res[c4d.BFM_INPUT_QUALIFIER] & c4d.QALT)

            print(f"{isShiftPressed=}, {isCtrlPressed=}, {isAltPressed=}")
            print("----------------------------")

        return c4d.gui.GeDialog.Message(self, msg, result)

Cheers,
Maxime.

C4DS

Thanks @m_adam
I can confirm that the following does work with R20, R23 and 2023

Int32 MyDialog::Message(const BaseContainer& msg, BaseContainer& result)
{
	BaseContainer keyChannels;
	if (GetInputState(BFM_INPUT_KEYBOARD, QCTRL, keyChannels))
	{
		Bool ctrlModifier = (keyChannels.GetInt32(BFM_INPUT_QUALIFIER) & QCTRL) != 0;