[FIXED] Moving a frameless QDialog with a MouseMoveEvent

Issue

So I have a frameless QDialog that I want to be able to move around simply by clicking and dragging it. Given the code below, dragging the dialog always snaps the very top-left (0,0) of the dialog to the mouse. How might I circumvent this, or rather, what might the math be for it?

Standard QDialog with the following basic subclass:

class Main(QtGui.QDialog):
    def __init__(self, args):
        QtGui.QDialog.__init__(self)

    def mouseMoveEvent(self, event):
        super(Main, self).mouseMoveEvent(event)
        if self.leftClick == True: self.moveWindow(event.globalPos())

    def mousePressEvent(self, event):
        super(Main, self).mousePressEvent(event)
        if event.button() == QtCore.Qt.LeftButton:
            self.leftClick = True

    def mouseReleaseEvent(self, event):
        super(Main, self).mouseReleaseEvent(event)
        self.leftClick = False

Solution

Instead of event.pos(), try calling event.globalPos(). From the QMouseEvent reference, "If you move the widget as a result of the mouse event, use the global position returned by globalPos() to avoid a shaking motion."

Answered By - Stephen Terry