[PyQt] Drag items across tabs

[Alfalfa]

dragMoveEvent required that event.acceptProposedAction() is called in dragEnterEvent. So by using tabAt(pos) as you suggested, this work:

#!/usr/bin/python3
import sys
from PyQt5 import QtCore, QtGui, QtWidgets


class TabBar(QtWidgets.QTabBar):
    def __init__(self, parent):
        super().__init__()
        self.setAcceptDrops(True)

    def dragEnterEvent(self, event):
        event.acceptProposedAction()
        QtWidgets.QTabBar.dragEnterEvent(self, event)

    def dragMoveEvent(self, event):
        pos = event.pos()
        index = self.tabAt(pos)
        self.setCurrentIndex(index)


class TabWidget(QtWidgets.QTabWidget):
    def __init__(self, parent):
        super().__init__()
        tab1 = QtWidgets.QTreeWidget()
        self.setTabBar(TabBar(self))
        self.addTab(tab1, "1st tab")
        self.addTab(QtWidgets.QTreeWidget(), "2nd tab")
        self.addTab(QtWidgets.QTreeWidget(), "3rd tab")

        item = QtWidgets.QTreeWidgetItem()
        item.setText(0, "drag me")
        tab1.addTopLevelItem(item)
        tab1.setDragDropMode(QtWidgets.QAbstractItemView.DragOnly)


class Main(QtWidgets.QMainWindow):
    def __init__(self, parent):
        super().__init__()
        self.ui = QtWidgets.QWidget(self)
        self.ui.tab = TabWidget(self)
        self.ui.layout = QtWidgets.QVBoxLayout()
        self.ui.layout.addWidget(self.ui.tab)
        self.ui.setLayout(self.ui.layout)
        self.setCentralWidget(self.ui)
        self.show()


if __name__== '__main__':
    app = QtWidgets.QApplication(sys.argv)
    gui = Main(app)
    sys.exit(app.exec_())

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forget the last post. It's so easy setChangeCurrentOnDrag

Thanks for the tip, I did not see this in the docs.. Sometimes the solutions are simpler than expected