Touchscreen doble click problem

[pablo7]

I am developing a graphic interface in a touch screen with QtCreator.

I have implemented a graphic keyboard to add characters to certein text filds, where every key is a QPushButton class.

The problem is when I press some key, the button event function [click( )] is called twice. What event could I used to add a single letter when I push a single key?

Thanks.

[yogeshgokul]

What event could I used to add a single letter when I push a single key?

You have to use QKeyEvent.

[pablo7]

Thank yogeshgokul, but I think QKeyEvent is used when I utilize real keyboard, but in my case I'm using virtual keyboard in a touchscreen like this image.
I don't know what event or function I have to use to call my function of QPushButton once instead of twice.

Thanks

[h123]

Hi pablo7,
You can try to catch the QTouchEvent and then filter required events.
Thanks.

[yogeshgokul]

I think QKeyEvent is used when I utilize real keyboard, but in my case I'm using virtual keyboard

QKeyEvent is your solution.

I don't know what event or function I have to use to call my function of QPushButton once instead of twice.

When you press a mouse left button on any part of this image. Say you clicked on "A". So, in mouse click event you have to do like this.

QKeyEvent keyEvent(QEvent::KeyPress, Qt::Key_A, Qt::NoModifier);
QApplication::sendEvent(parent->focusWidget(), &event);

QKeyEvent keyEvent(QEvent::KeyPress, Qt::Key_A, Qt::NoModifier);
QApplication::sendEvent(parent->focusWidget(), &event);

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Using this approach, I also created a virtual keyboard. But I was using QToolButtons instead of an Image. Please see the attached screen shot.

[pablo7]

Thanks yogeshgokul. It looks a good idea, I will try it.