mouseMoveEvent() does not give information about the button that was pressed

[mrjbom]

Hi.

I have overloaded several functions to handle mouse events

void mousePressEvent(QMouseEvent *event) override;
void mouseReleaseEvent(QMouseEvent *event) override;
void mouseMoveEvent(QMouseEvent *event) override;

In the first two functions, when using event->button() I get the correct button.

However, in the case of mouseMoveEvent(), I get Qt::NoButton.
For me, this event only occurs when I move the mouse with the mouse button held down.
Why is this happening?

[SGaist]

Hi,

No it does not, you might have enabled mouse tracking on your widget and therefore your will get this event without or without button pressed.

[mrjbom]

@SGaist No.
I realized that this is normal, the documentation for the button() method says: "Note that the returned value is always Qt::NoButton for mouse move events."
Thanks for answer.

[SGaist]

Indeed it is in the documentation. I thought you were questioning that so I was answering to this particular sentence:
@mrjbom said in mouseMoveEvent() does not give information about the button that was pressed:

For me, this event only occurs when I move the mouse with the mouse button held down.