Qt how to check which mouse button is pressed - c++

Question

I have problems in PySide while trying to determine which mouse button is pressed in event function. I need it in particular for ignoring mouse move event, because it's doing job on both mouse buttons, left and right.
I want to ignore mouse move event if the right button on scene is pressed. Any help?

Answer 1

All of mouse events have two methods (button and buttons) to determine which of buttons are pressed. But for only move event the documentation says:
Note that the returned value is always Qt::NoButton for mouse move events.
for mouseMoveEvent you should use buttons method.
void mouseMoveEvent(QMouseEvent *e)
{
if(e->buttons() == Qt::RightButton)
qDebug() << "Only right button";
}
In order to ignore move events you need to do this work in eventFilter of course.

Answer 2

QApplication::mouseButtons() will return the status of mouseButton,
so, you can get the status of mouse in KeyPressEvent.

Answer 3

you can check, which mouse button is pressed via Qt::RightButton. Sorry for c++ code, but i hope, you would understand idea anyway:
void mousePressEvent(QMouseEvent *event)
{
if (event->button()==Qt::RightButton){
qDebug() << "right button is pressed
}
}

Answer 4

You could use a boolean:
void mousePressEvent(QMouseEvent *event)
{
if (event->button()==Qt::RightButton){
qDebug() << "right button is pressed
pressed=true; //<-----
}
}
and on mouseMoveEvent
void GLWidget::mouseMoveEvent(QMouseEvent *event)
{
float dx = event->x() - lastPos.x(); // where lastpos is a QPoint member
float dy = event->y() - lastPos.y();
if (dx<0) dx=-dx;
if (dy<0) dy=-dy;
if (event->buttons() & Qt::LeftButton) { //if you have MOVEd
...do something
}
if (event->buttons() & Qt::RightButton) {
if (pressed==true) return;
else{
...do
}
}
}
On mouserelease you have to set pressed=false; ( "pressed" must be a member of the class)
Hope it helps,let me know