Multitouch in Linux

Question

I have two questions:

How to simulate touch event in linux.
How to work with multitouch on Qt in Linux.

score 3 · Accepted Answer · edited Feb 12 '13 at 06:06

You can simulate touch events by calling qt_translateRawTouchEvent directly. (This method is not documented, but it's in qapplication.cpp and it's exported).

You want to put this at the top of your file:

// forward-declaration of Qt internal function
Q_GUI_EXPORT void qt_translateRawTouchEvent(QWidget *window, 
                                        QTouchEvent::DeviceType deviceType,
                                        const QList<QTouchEvent::TouchPoint> &touchPoints);

The function call syntax is :

qt_translateRawTouchEvent(targetWidget, deviceType, points.values());

In your case call this method with (NULL, QTouchEvent::TouchScreen, touchPoints) where touchPoints is your list of points being currently touched by the user. This should work in Qt 4.7 and 4.8 at least, possibly before in Qt 5 but I didn't check that.

score 3 · Answer 2 · answered Mar 12 '10 at 16:16

3

For the multitouch question, you are probably wanting to have a look at the Gestures API that Qt has added.

answered Mar 12 '10 at 16:16

Caleb Huitt - cjhuitt

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Ок, but how I can simulate touch in Linux? I need to simulate gesture. – Alex Raeder Mar 13 '10 at 11:17
@Alex Snet: I don't know how to simulate the touch event. When you ask multiple questions like this, you need to expect some people may only know the answer to one of them. – Caleb Huitt - cjhuitt Mar 15 '10 at 17:51

Multitouch in Linux

2 Answers2