python3+PyQt5实现使用剪贴板做复制与粘帖

#!/usr/bin/env python3
import os
import sys
from PyQt5.QtCore import (QMimeData, Qt)
from PyQt5.QtWidgets import (QApplication, QDialog, QGridLayout, QLabel,
QPushButton)
from PyQt5.QtGui import QPixmap

class Form(QDialog):

def __init__(self, parent=None):
super(Form, self).__init__(parent)

textCopyButton = QPushButton("&Copy Text")
textPasteButton = QPushButton("Paste &Text")
htmlCopyButton = QPushButton("C&opy HTML")
htmlPasteButton = QPushButton("Paste &HTML")
imageCopyButton = QPushButton("Co&py Image")
imagePasteButton = QPushButton("Paste &Image")
self.textLabel = QLabel("Original text")
self.imageLabel = QLabel()
self.imageLabel.setPixmap(QPixmap(os.path.join(
os.path.dirname(__file__), "images/clock.png")))

layout = QGridLayout()
layout.addWidget(textCopyButton, 0, 0)
layout.addWidget(imageCopyButton, 0, 1)
layout.addWidget(htmlCopyButton, 0, 2)
layout.addWidget(textPasteButton, 1, 0)
layout.addWidget(imagePasteButton, 1, 1)
layout.addWidget(htmlPasteButton, 1, 2)
layout.addWidget(self.textLabel, 2, 0, 1, 2)
layout.addWidget(self.imageLabel, 2, 2)
self.setLayout(layout)

textCopyButton.clicked.connect(self.copyText)
textPasteButton.clicked.connect(self.pasteText)
htmlCopyButton.clicked.connect(self.copyHtml)
htmlPasteButton.clicked.connect(self.pasteHtml)
imageCopyButton.clicked.connect(self.copyImage)
imagePasteButton.clicked.connect(self.pasteImage)

self.setWindowTitle("Clipboard")

def copyText(self):
clipboard = QApplication.clipboard()
clipboard.setText("I've been clipped!")

def pasteText(self):
clipboard = QApplication.clipboard()
self.textLabel.setText(clipboard.text())

def copyImage(self):
clipboard = QApplication.clipboard()
clipboard.setPixmap(QPixmap(os.path.join(
os.path.dirname(__file__), "images/gvim.png")))

def pasteImage(self):
clipboard = QApplication.clipboard()
self.imageLabel.setPixmap(clipboard.pixmap())

def copyHtml(self):
mimeData = QMimeData()
mimeData.setHtml("<b>Bold and <font color=red>Red</font></b>")
clipboard = QApplication.clipboard()
clipboard.setMimeData(mimeData)

def pasteHtml(self):
clipboard = QApplication.clipboard()
mimeData = clipboard.mimeData()
if mimeData.hasHtml():
self.textLabel.setText(mimeData.html())

if __name__ == "__main__":
app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()