Too few MouseMoveEvents

[BastiWF]

Hi gals + guys!

I set mousetracking=true to the viewport of my QGraphicsview.

I am then watching over MouseMoveEvents in my MainWindow class.

Why is it that I only recieve MouseMoveEvents every 5 seconds or so even when I'm scrolling around the panel like stupid?

To make it clear: I AM recieving events, just not enough.

[scascio]

Why not setting mouse tracking directly to your QGraphicsView?
has your viewport something special?

[BastiWF]

No it does not. But by reading thru the NET it seemed like the 'way to do it'.

Anyways setting mousetracking=true directly on the QGraphicsView achieves the same effect. Rare move events.


Edit: I think I'm just not getting any events when the cursor is in the graphicsScene which is inside the graphicsview...... Only right on the crack when leaving the whole window.

I just subclassed QGraphicsScene and implemented mousemoveevent but it isnt getting called... strange!

[ericV]

Hello, I was experiencing the same(similar) problem.

In my case I have a Widget subclassed from QFrame. Since I want to be able to re-size the Widget, i decided to handle the mouse movements in order to set the proper cursors when hovering the edges, but at certain mouse speeds it just kept the re-size cursors even though the mouse was moving inside the widget.

That's when i noticed that you must enable mouse Tracking for all relevant Widgets, so i guess in your case you also have to enable the mouse tracking for your graphics elements.

Greets and hope this helps.

Eric

[wysota]

Do you get all the needed events if you hold the mouse button pressed?

[srinirao]

For receiving frequent MouseMove events is it necessary that mainwindow should have its centralWidget should be of type QGraphicsView ?. In my application the central Widget is if type QWidget, I am unable to receive frequent mouseMoveEvents in mainwindow even after settings mouse tracking.

Can we not get mouseEvents without making use of QGraphicsView class ?

[wysota]

Can we not get mouseEvents without making use of QGraphicsView class ?

Sure we can.