Qt - Determine absolute widget and cursor position

Question

I have a QWidget that contains multiple children. The ultimate goal is to be able to drag and drop from one widget to the other, moving something between widgets. I\'ve go

Answer 1

Maybe you are looking for geometry() or frameGeometry() in QWidget. See here for more details.

Answer 2

As already said you should rather use targetWidget->geometry() instead of contentsRect() in this special case.

Next I wonder which class the code you posted belongs to. The method QWidget::mapToGlobal() should be invoked from the QWidget your coordinates are relative to. If I got you right, it should look like something like this:

QRect widgetRect = targetWidget->geometry();
widgetRect.moveTopLeft(targetWidget->parentWidget()->mapToGlobal(widgetRect.topLeft()));

Then note QCursor::pos() is already returning global screen coordinates, so no need to map anything here:

if (widgetRect.contains(QCursor::pos())) {
    /* swap widgets */
}

EDIT: Probably it's even better to not map the rect to global, but to map the global cursor position to the widget:

if (targetWidget->rect().contains(targetWidget->mapFromGlobal(QCursor::pos()))) {
    /* do stuff */
}

Answer 3

This PyQt method will return True if the mouse position is within the widget's rect - including cases such as the mouse being over a combo view inside the widget

def underMouse(self):
    pos = QtGui.QCursor.pos()
    rect = self.rect()
    leftTop     = self.mapToGlobal(QtCore.QPoint(rect.left(),rect.top()))
    rightBottom = self.mapToGlobal(QtCore.QPoint(rect.right(),rect.bottom()))
    globalRect = QtCore.QRect(leftTop.x(), leftTop.y(), rightBottom.x(), rightBottom.y() )
    return globalRect.contains(self.mapToGlobal(pos))