python中PyQt信号和插槽如何连接
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1、为了让菜单选项和工具栏在用户点击它们时启动,需要将信号与内置插槽连接起来。
2、QAction物体可以发出各种信号。triggered()与插槽连接。
菜单和工具栏中最常用的信号是.triggered()。用户每次点击菜单选项或工具栏按钮都会发出这个信号。
实例
class Window(QMainWindow): # Snip... def newFile(self): # Logic for creating a new file goes here... self.centralWidget.setText("<b>File > New</b> clicked") def openFile(self): # Logic for opening an existing file goes here... self.centralWidget.setText("<b>File > Open...</b> clicked") def saveFile(self): # Logic for saving a file goes here... self.centralWidget.setText("<b>File > Save</b> clicked") def copyContent(self): # Logic for copying content goes here... self.centralWidget.setText("<b>Edit > Copy</b> clicked") def pasteContent(self): # Logic for pasting content goes here... self.centralWidget.setText("<b>Edit > Paste</b> clicked") def cutContent(self): # Logic for cutting content goes here... self.centralWidget.setText("<b>Edit > Cut</b> clicked") def helpContent(self): # Logic for launching help goes here... self.centralWidget.setText("<b>Help > Help Content...</b> clicked") def about(self): # Logic for showing an about dialog content goes here... self.centralWidget.setText("<b>Help > About...</b> clicked")
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