32. PyQt6 中的拖拽操作2

import sys
from PyQt6.QtWidgets import QApplication, QWidget, QPushButton
from PyQt6.QtGui import QGuiApplication, QDrag
from PyQt6.QtCore import Qt, QMimeData


class Button(QPushButton):

    def __init__(self, title, parent):
        super().__init__(title, parent)

    def mouseMoveEvent(self, e):
        if e.buttons() != Qt.MouseButton.RightButton:
            return

        mimeData = QMimeData()
        drag = QDrag(self)
        drag.setMimeData(mimeData)

        drag.setHotSpot(e.position().toPoint() - self.rect().topLeft())

        # print(e.position().toPoint(), self.rect().topLeft())
        dropAction = drag.exec(Qt.DropAction.MoveAction)

    def mousePressEvent(self, e):
        super().mousePressEvent(e)
        if e.button() == Qt.MouseButton.LeftButton:
            print("press")


class App(QWidget):

    def __init__(self):
        super().__init__()
        self.button = None
        self.initUI()

    def initUI(self):
        self.setWindowTitle("PyQt6 中的拖拽操作2")

        self.setAcceptDrops(True)
        self.button = Button("按钮", self)
        self.button.move(100, 65)

        self.setGeometry(100, 100, 400, 300)
        self.center()

    def dragEnterEvent(self, e):
        e.accept()

    def dropEvent(self, e):
        position = e.position()
        self.button.move(position.toPoint())
        e.setDropAction(Qt.DropAction.MoveAction)
        e.accept()

    def center(self):
        qr = self.frameGeometry()
        cp = QGuiApplication.primaryScreen().availableGeometry().center()
        qr.moveCenter(cp)
        self.move(qr.topLeft())


if __name__ == "__main__":
    app = QApplication(sys.argv)
    cls_app = App()
    cls_app.show()
    sys.exit(app.exec())