import os
import sys
from PyQt5.QtCore import QMimeData
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)

    #创建复制粘贴按钮，并添加快捷键
    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")

    #创建文本标签和图像标签，显示文本和图像
    self.textLabel = QLabel("Original text")
    self.imageLabel = QLabel()
    self.imageLabel.setPixmap(QPixmap(os.path.join(
      os.path.dirname(__file__), "E:\pyqt5快速开发与实战\第四章\images\python.png")))

    #设置栅格布局，并添加部件到相应的位置
    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)

    #设置主窗口的布局，自定义槽函数，设置标题
    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 例子")

  def copyText(self):
    #实例化剪切板，设置剪切板的文本
    clipboard = QApplication.clipboard()
    clipboard.setText("I've been clipped!")

  def pasteText(self):
    #实例化剪切板，标签设置为剪切板的文本并显示
    clipboard = QApplication.clipboard()
    self.textLabel.setText(clipboard.text())

  def copyImage(self):
    #实例化剪切板，设置剪切板加载的图想路径
    clipboard = QApplication.clipboard()
    clipboard.setPixmap(QPixmap(os.path.join(
      os.path.dirname(__file__), "./images/python.png")))

  def pasteImage(self):
    #实例化剪切板，z设置图像标签的图片加载，从剪切板获取路径
    clipboard = QApplication.clipboard()
    self.imageLabel.setPixmap(clipboard.pixmap())

  def copyHtml(self):
    #实例化MimeData数据类型，设置类型Html的文本
    mimeData = QMimeData()
    mimeData.setHtml("<b>Bold and <font color=red>Red</font></b>")
    #实例化剪切板，设置MimeData的初值文本
    clipboard = QApplication.clipboard()
    clipboard.setMimeData(mimeData)

  def pasteHtml(self):
    #实例化剪切板，，获取MimeData的数据，并设置为标签的文本值
    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()
  sys.exit(app.exec_())

#实例化剪切板，标签设置为剪切板的文本并显示
clipboard = QApplication.clipboard()
self.textLabel.setText(clipboard.text())

clipboard = QApplication.clipboard()
self.imageLabel.setPixmap(clipboard.pixmap())