CODEWITHSUNDEEP
qtevent-handlingpyside
Johnnylin
Johnnylin

Reputation: 535

How can I distinguish wheel button click event from mouse press event?

I am wondering how i can distinguish wheel click event from mouse press event. Because i want to do different handling for these two events in pyside. Currently, every time I click the wheel button, the event is catched by mousepressevent. Can anyone explain ?

Edit: I want to implement this in a subclass of qglwidget class

Upvotes: 1

Views: 4912

Answers (1)

vicrion
vicrion

Reputation: 1733

From its name, the mousePressEvent is responsible for mouse clicks while the wheelEvent is for scrolling solely. The wheelEvent will not catch the wheel button click. It is how the Qt's API is designed when it comes to mouse events processing.

In order to separate which mouse button is pressed (right, wheel or left), use button property of QMouseEvent.

This is how the code would look like using C++ (I imagine it is easy to translate it to pyside)

void GLWidget::mousePressEvent(QMouseEvent *event) // redefine the mouse event
{
switch( event->button() ) {
case Qt::LeftButton:
    // do stuff for left button pressed
    break;
case Qt::MiddleButton:
    // do stuff for wheel button pressed
    break;
// ...
}
}

So, for pyside, you only need to compare the button property of event in mousePressEvent and see whether it is Qt.LeftButton , Qt.RightButton or Qt.MidButton. Hope that helps.

Upvotes: 6

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