Drop on QMdiArea



  • Hi guys,

    I've subclassed a QMdiArea to accept drops. Further I've subclassed a QMdiSubWindow to setAcceptDrops to false. Despite that the subwindows accept the drops (propagate the drops to the QMdiArea) which is not desired. Here's the code (in Python):

    @
    from PyQt4.QtGui import *
    from PyQt4.QtCore import *

    class MDIArea(QMdiArea):

    def __init__(self, parent=None):
        super(MDIArea, self).__init__(parent)
        self.setAcceptDrops(True)
    
    def add_sub_window(self, text):
        sub_window = MDISubWindow(text)
        self.addSubWindow(sub_window)
        sub_window.show()
    
    def dropEvent(self, drop_event):
        mime_data = drop_event.mimeData()
        text = unicode(mime_data.text())
        self.add_sub_window(text)
    
    def dragEnterEvent(self, event):
        event.acceptProposedAction()
    

    class MDISubWindow(QMdiSubWindow):

    def __init__(self, text, parent=None):
        super(MDISubWindow, self).__init__(parent)
        self.label = QLabel(text)
        self.setWidget(self.label)
        self.setAcceptDrops(False)
    

    class TestLabel(QLabel):

    def __init__(self, parent=None):
        super(TestLabel, self).__init__(parent)
        self.setText("Jan")
    
    def mousePressEvent(self, mouse_event):
        if mouse_event.button() == Qt.LeftButton:
            self.dragStartPosition = mouse_event.pos()
        else:
            self.mousePressEvent(mouse_event)
    
    def mouseMoveEvent(self, mouse_event):
        if mouse_event.buttons() == Qt.LeftButton:
            if (mouse_event.pos() - self.dragStartPosition).manhattanLength() < QApplication.startDragDistance():
                return
            drag = QDrag(self)
            mime_data = QMimeData()
            mime_data.setText(self.text())
            drag.setMimeData(mime_data)
            drop_action = drag.exec_(Qt.MoveAction)
        else:
            self.mousePressEvent(mouse_event)
    

    if name == "main":
    import sys

    app = QApplication(sys.argv)
    
    mdi_area = MDIArea()
    mdi_area.show()
    
    test_label = TestLabel()
    test_label.show()
    
    app.exec_()
    

    @

    Somehow I managed to get it done in prior versions but can't recall how ... (and didn't commit to vcs ... stupid me).

    Any help is highly appreciated,

    Jan


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