如何将多个QPixmap放在继承自QtWidgets.QGraphicsPixmapItem的类中？

Question

今天，我陷入了QPixmap的困境。我的班级继承自QtWidgets.QGraphicsPixmapItem，如下例所示。

class graphicButton(QtWidgets.QGraphicsPixmapItem):
    def __init__(self):
        pixmapA = QtGui.QPixmap(r"img.png")

        QtWidgets.QGraphicsPixmapItem.__init__(self, pixmapA)
        self.setFlags(
            self.flags( )
            | QtWidgets.QGraphicsItem.ItemIsSelectable
            | QtWidgets.QGraphicsItem.ItemIsMovable
        )
    def mousePressEvent(self, event):
        if event.button() == QtCore.Qt.LeftButton:
            print("mouse left press")
            event.accept()
        elif event.button() == QtCore.Qt.RightButton:
            print("mouse right press")
            event.accept()
        elif event.button() == QtCore.Qt.MidButton:
            print("mouse middle press")
            event.accept()

它工作正常，但如果我想放一张照片呢？在我在谷歌中发现的大多数情况下，你需要制作多个QGraphicsPixmapItems。在那种情况下，我不能继承QGraphicsPixItem并且我必须去QGraphicsItem或者我错过了什么？

Answer 1

简单的解决方案是加载与其位置相关联的图像，例如在下面的情况下，我将图像放在五边形的顶点中：

import random
from PyQt5 import QtCore, QtGui, QtWidgets


class GraphicsButton(QtWidgets.QGraphicsPixmapItem):
    def __init__(self, name, pixmap, parent=None):
        super(GraphicsButton, self).__init__(pixmap, parent)
        self.setFlag(QtWidgets.QGraphicsItem.ItemIsSelectable, True)
        self.setFlag(QtWidgets.QGraphicsItem.ItemIsMovable, True)
        self._name = name

    @property
    def name(self):
        return self._name

    def mousePressEvent(self, event):
        if event.button() == QtCore.Qt.LeftButton:
            print("mouse left press")
        elif event.button() == QtCore.Qt.RightButton:
            print("mouse right press")
        elif event.button() == QtCore.Qt.MidButton:
            print("mouse middle press")
        print(self.name)
        super(GraphicsButton, self).mousePressEvent(event)


class MainWindow(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)

        scene = QtWidgets.QGraphicsScene()
        view = QtWidgets.QGraphicsView(scene)
        self.setCentralWidget(view)
        # coordinates of the pentagon
        datas = [
            ("name1", "img0.png", QtCore.QPointF(0, -200)),
            ("name2", "img1.png", QtCore.QPointF(-190, -62)),
            ("name3", "img2.png", QtCore.QPointF(-118, 162)),
            ("name4", "img3.png", QtCore.QPointF(118, 162)),
            ("name5", "img0.png", QtCore.QPointF(190, -62)),
        ]
        for name, path, position in datas:
            item = GraphicsButton(name, QtGui.QPixmap(path))
            scene.addItem(item)
            item.setPos(position)


if __name__ == "__main__":
    import sys

    app = QtWidgets.QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(app.exec_())