PyQt4.x Python 2.7 + QGraphicview with custom widget, move position with mouse

Dariusz

Hey

Hope this is the right place.

I have added a QGroupBox to QGraphicview via:

self.Scene = QGraphicsScene()
ab = CustomGroupBox() # Subclassed
self.Scene.addWidget(ab)

I then subclassed the QGroupBox with hoping that I can override

mouseMoveEvent()

With something like this :

def mouseMoveEvent(self, event):
    super(CustomGroupBox, self).mouseMoveEvent(event)
    print event
    p = QtGui.QCursor.pos()
    pos_wid =  self.mapToGlobal(self.pos())
    self.move(p.x(),p.y())

So that I can move the widget around in the scene. However every time I click and start dragging the widget jumps by xx pixels right/left anywhere depending where the window is. I know is an issue of positioning I just don't know how to solve it :- (.

Any help would be amazing!
Regards
Dariusz

SGaist

Hi and welcome to devnet,

IIRC, that's already handled by the Graphics View Framework. Take a look at the GraphicsItemFlag and setFlag.

Hope it helps

Dariusz

Hey

Mmmm I'm lost... where do you want me to set the flag up ?

I tried setting it up on my custom widget but that does nothing as far as I can tell.. When I disabled my mouseMoveEvent and just let ur flags I could not move icons at all...

Here is video of the issues : https://vid.me/hwaa
Here is most of my custom widget:

class CustomGroupBox(QGroupBox):
    def __init__(self, parent=None):
        super(CustomGroupBox, self).__init__(parent)
def mouseMoveEvent(self, event):
        super(CustomGroupBox, self).mouseMoveEvent(event)
        p = QtGui.QCursor.pos()
        self.move(p.x(),p.y())

I think what I need is to somehow remap my mouse position to graphic view position and then on top of that offset widget position to mouse... but no idea how :- (

SGaist

On the item returned by self.Scene.addWidget(ab)

Dariusz

Hey

Humh I must be missing something... when I tried :

        ab = QGroupBox()
        ab.setFixedWidth(200)
        xx = QGridLayout()
        wa = QPushButton("wow")
        xx.addWidget(wa)
        wa.clicked.connect(self.printWiw)
        ab.setLayout(xx)
        ab.setFlag(QtGui.QGraphicsItem.ItemIsMovable)
        self.Scene.addWidget(ab)

I got :

ab.setFlag(QtGui.QGraphicsItem.ItemIsMovable)
AttributeError: 'QGroupBox' object has no attribute 'setFlag'

When I tried to add it after scene :

for items in self.Scene.items():
items.setFlag(QtGui.QGraphicsItem.ItemIsMovable)

The item groupbox is still unmovable.

Edit:
Also tried:

for items in self.Scene.items():
            items.setFlag(QtGui.QGraphicsItem.ItemIsMovable, True)
            items.setFlag(QtGui.QGraphicsItem.ItemIsSelectable, True)

SGaist

Hi,

This stackoverflow answer might give you some clues.