How to detect hover events when mouse button is pressed

[yagabey]

If you want to perform mouse TRACKING, there is a setting for that in the Widget class

I am dealing with QGraphicsItem. Since it is not a subclass of QWidget there is no such setting.

Perhaps I am expressing it in the wrong way. More clearly step by step:
1) Left mouse button is pressed anywhere on the scene and hold pressed
2) Now the cursor goes through my QGraphicsItem object
3) Result: None of mouse events are detected

As Wysota said the scene is the mouse grabber; so that is an expected behaviour. But i am still curious if there is an alternative method to achieve my goal

[SixDegrees]

I am dealing with QGraphicsItem. Since it is not a subclass of QWidget there is no such setting.

But you don't want to intercept events on the GraphicsItem; you want to intercept them within the GraphicsView. Which is a ScrollArea.

In any case, more primitive tracking is the only way to do what you're asking. Once things have progressed to the level of hovering, no meaningful such events are going to occur over your GraphicsItem. You have to take responsibility for implementing such handling at a lower level, as noted above.

[wysota]

I am dealing with QGraphicsItem. Since it is not a subclass of QWidget there is no such setting.

Perhaps I am expressing it in the wrong way. More clearly step by step:
1) Left mouse button is pressed anywhere on the scene and hold pressed
2) Now the cursor goes through my QGraphicsItem object
3) Result: None of mouse events are detected

As Wysota said the scene is the mouse grabber; so that is an expected behaviour. But i am still curious if there is an alternative method to achieve my goal

Could you say what you need this functionality for? Maybe there are better ways to achieve it.

[Grade]

I'm sorry to up the topic, but I've got the exact same problem.

I want to create a Map Editor. I use QGraphics Scene and QGraphics View to draw the map, and I use QGraphicsItem for every tiles (32x32 pixels). I have two areas : One is the tileset where I can select the tile I want to use, and the other represents the map where I can use my selected tile and put it where I want on the map.

My problem is : If I click a tile and then I move my mouse to another tile, it doesn't draw the selected tiles on both of them, but only on the one I clicked first.
Also: I use the hoverEvent to draw cursor on the tiles. When I move my mouse on a tile, it shows that I want to select THIS tile. But if I click it and then I move, the cursor doesn't follow the mouse anymore.

I don't know if my problem is clear but I would apreciate very much if you could help me !
(Sorry for my bad english).

[suxiaojian1987@gmail.com]

Could you say what you need this functionality for? Maybe there are better ways to achieve it.

I still got is problem currently, and how you finally deal with it ?

I'm sorry to up the topic, but I've got the exact same problem.

I want to create a Map Editor. I use QGraphics Scene and QGraphics View to draw the map, and I use QGraphicsItem for every tiles (32x32 pixels). I have two areas : One is the tileset where I can select the tile I want to use, and the other represents the map where I can use my selected tile and put it where I want on the map.

My problem is : If I click a tile and then I move my mouse to another tile, it doesn't draw the selected tiles on both of them, but only on the one I clicked first.
Also: I use the hoverEvent to draw cursor on the tiles. When I move my mouse on a tile, it shows that I want to select THIS tile. But if I click it and then I move, the cursor doesn't follow the mouse anymore.

I don't know if my problem is clear but I would apreciate very much if you could help me !
(Sorry for my bad english).

I still got is problem currently, and how you finally deal with it ?
thanks.