Why does MapGraphicsView not have a signal for mouse hover move?

troyfoster

From looking at the runtime Java's API their mouse moved signal is a hover move and mouse dragged is for when the user click and dragged the mouse on the map.  Why doesn't the runtime Qt have the same sort of setup for connecting to a signal for hover move events?

 

I currently have a workaround by creating a class inheriting QGraphicsItem and calling setAcceptHoverEvents on it.  However I have reports from our users that sometimes the QGraphicsItem class sometimes stops receiving any mouse events at all until the window is resized.

Tanner_Yould

Hi Troy, I hope I can help here. You can enable (or disable) mouse tracking on a `MapGraphicsView` when hovering with `setMouseTracking(bool enable) `, which it inherits from `QWidget`. To help test a solution, I added the following code block to our Display Map C++ Widget sample and the `mouseMoved` signal emits when I move my mouse around the map while hovering and prints the mouse's current xy position.

 

m_mapView->setMouseTracking(true);

connect(m_mapView, &MapGraphicsView::mouseMoved, this, [](QMouseEvent mouseEvent)
{
  qDebug() << mouseEvent.x() << mouseEvent.y();
});

 

I hope this helps and please let me know if there's anything else I can do.

Thank you!