Python Qt GUI设计:QClipboard剪贴数据类(基础篇—19)

2021-10-26 10:47:24 浏览数 (1)

QClipboard类提供了对系统剪贴板的访问,可以在应用程序之间复制和粘贴数据,它的操作类似于QDrag类,使用类似的数据类型。

QApplication类有一个静态方法clipboard(),它返回对剪贴板对象的引用。任何类型的MimeData都可以从剪贴板复制或粘贴。

QClipboard类中的常用方法如下表所示:

QClipboard类中的常用信号如下表所示:

通过示例了解QClipboard剪贴数据类,示例效果如下所示:

示例中,有6个按钮和2个标签。需要实例化clipboard对象,可以将文本复制到clipboard对象中,也可以将图片复制到剪贴板对象中。

实现代码如下所示:

代码语言:javascript复制
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)
		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 例子")
		
	def copyText(self):
		clipboard = QApplication.clipboard()
		clipboard.setText("不脱发的程序猿")
	
	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__), "./4.jpg")))
	
	def pasteImage(self):
		clipboard = QApplication.clipboard()
		self.imageLabel.setPixmap(clipboard.pixmap())
	
	def copyHtml(self):
		mimeData = QMimeData()
		mimeData.setHtml("<b>公众号:美男子玩编程</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()
	sys.exit(app.exec_())

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