实战PyQt5: 029-快捷键编辑控件QKeySequenceEditQKeySequenceEdit简介测试QKeySequenceEdit本文知识点

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概述

QKeySequenceEdit简介

QKeySequenceEdit是一个用于输入快捷键序列的控件，快捷键输入完成后发射keySequenceChanged（ QKeySequence）和editingFinished（）信号，前一个信号的传入参数就是新的快捷键序列，后一个信号不直接提供快捷键序列，但可以通过控件的keySequence来获取。

QKeySequenceEdit常用方法:

setKeySequence()：设置快捷键序列
keySequence()：获得快捷键序列
clear()：清除快捷键序列

QKeySequenceEdit常用信号:

keySequenceChanged：快捷键序列发生改变，发射信号，并传入快捷键序列
editingFinished：快捷键编辑结束后发射该信号

QKeySequenceEdit类继承关系：

实战PyQt5: 029-快捷键编辑控件QKeySequenceEdit

测试QKeySequenceEdit

qkeysequenceedit.py演示快捷键编辑和设置的方法, 在程序中，我们创建了两个按钮""打开文件"和"另存为", 然后通过QKeySequenceEdit为按钮"打开文件"编辑快捷"Ctrl+O"并点击"设置快捷键"设置，之后，直接按"Ctrl+O"即可直接打开文件对话框，类似为按钮"另存为"设置快捷键"Ctrl+A"，完整代码如下：

Ui_editshortcut.py(由uic根据editshortcut.ui生成):

from PyQt5 import QtCore, QtGui, QtWidgets
 
class Ui_EditShortcut(object):
    def setupUi(self, EditShortcut):
        EditShortcut.setObjectName("EditShortcut")
        EditShortcut.resize(400, 300)
        self.verticalLayout = QtWidgets.QVBoxLayout(EditShortcut)
        self.verticalLayout.setObjectName("verticalLayout")
        self.horizontalLayout = QtWidgets.QHBoxLayout()
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.btnOpenFile = QtWidgets.QToolButton(EditShortcut)
        self.btnOpenFile.setMinimumSize(QtCore.QSize(64, 0))
        self.btnOpenFile.setToolButtonStyle(QtCore.Qt.ToolButtonTextUnderIcon)
        self.btnOpenFile.setObjectName("btnOpenFile")
        self.horizontalLayout.addWidget(self.btnOpenFile)
        self.btnSaveFileAs = QtWidgets.QToolButton(EditShortcut)
        self.btnSaveFileAs.setMinimumSize(QtCore.QSize(64, 0))
        self.btnSaveFileAs.setToolButtonStyle(QtCore.Qt.ToolButtonTextUnderIcon)
        self.btnSaveFileAs.setObjectName("btnSaveFileAs")
        self.horizontalLayout.addWidget(self.btnSaveFileAs)
        spacerItem = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
        self.horizontalLayout.addItem(spacerItem)
        self.verticalLayout.addLayout(self.horizontalLayout)
        spacerItem1 = QtWidgets.QSpacerItem(20, 80, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Fixed)
        self.verticalLayout.addItem(spacerItem1)
        self.formLayout = QtWidgets.QFormLayout()
        self.formLayout.setHorizontalSpacing(20)
        self.formLayout.setObjectName("formLayout")
        self.label = QtWidgets.QLabel(EditShortcut)
        self.label.setObjectName("label")
        self.formLayout.setWidget(0, QtWidgets.QFormLayout.LabelRole, self.label)
        self.cmbBox = QtWidgets.QComboBox(EditShortcut)
        self.cmbBox.setObjectName("cmbBox")
        self.cmbBox.addItem("")
        self.cmbBox.addItem("")
        self.formLayout.setWidget(0, QtWidgets.QFormLayout.FieldRole, self.cmbBox)
        self.label_2 = QtWidgets.QLabel(EditShortcut)
        self.label_2.setObjectName("label_2")
        self.formLayout.setWidget(1, QtWidgets.QFormLayout.LabelRole, self.label_2)
        self.keySeqEdit = QtWidgets.QKeySequenceEdit(EditShortcut)
        self.keySeqEdit.setObjectName("keySeqEdit")
        self.formLayout.setWidget(1, QtWidgets.QFormLayout.FieldRole, self.keySeqEdit)
        spacerItem2 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
        self.formLayout.setItem(2, QtWidgets.QFormLayout.LabelRole, spacerItem2)
        self.btnSet = QtWidgets.QPushButton(EditShortcut)
        self.btnSet.setObjectName("btnSet")
        self.formLayout.setWidget(2, QtWidgets.QFormLayout.FieldRole, self.btnSet)
        self.verticalLayout.addLayout(self.formLayout)
        spacerItem3 = QtWidgets.QSpacerItem(20, 79, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)
        self.verticalLayout.addItem(spacerItem3)
 
        self.retranslateUi(EditShortcut)
        QtCore.QMetaObject.connectSlotsByName(EditShortcut)
 
    def retranslateUi(self, EditShortcut):
        _translate = QtCore.QCoreApplication.translate
        EditShortcut.setWindowTitle(_translate("EditShortcut", "实战PyQt5: QKeySequenceEdit Demo!"))
        self.btnOpenFile.setText(_translate("EditShortcut", "打开文件"))
        self.btnSaveFileAs.setText(_translate("EditShortcut", "另存为"))
        self.label.setText(_translate("EditShortcut", "选择修改项:"))
        self.cmbBox.setItemText(0, _translate("EditShortcut", "打开文件"))
        self.cmbBox.setItemText(1, _translate("EditShortcut", "另存为"))
        self.label_2.setText(_translate("EditShortcut", "编辑快捷键:"))
        self.btnSet.setText(_translate("EditShortcut", "设置快捷键"))

qkeysequenceedit.py：

import sys
 
from PyQt5 import QtCore, QtGui, QtWidgets
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QKeySequence
from PyQt5.QtWidgets import (QApplication, QWidget, QStyle, QFileDialog)
 
from Ui_editshortcut import Ui_EditShortcut
 
class DemoKeySequenceEdit(QWidget):
    def __init__(self, parent=None):
        super(DemoKeySequenceEdit, self).__init__(parent)       
        
        self.shortcutKey = QKeySequence()
        
        self.ui = Ui_EditShortcut()
        self.ui.setupUi(self)
        
        self.ui.btnOpenFile.setIcon(QApplication.style().standardIcon(QStyle.SP_DialogOpenButton))
        self.ui.btnOpenFile.clicked.connect(self.onFileOpen)
        self.ui.btnSaveFileAs.setIcon(QApplication.style().standardIcon(QStyle.SP_DialogSaveButton))
        self.ui.btnSaveFileAs.clicked.connect(self.onSaveFileAs)
        
        self.ui.keySeqEdit.keySequenceChanged[QKeySequence].connect(self.btnShortcutChanged)
        self.ui.btnSet.clicked.connect(self.OnShortcutSet)
                
    def onFileOpen(self):
        QFileDialog.getOpenFileName(self, '打开文件', '', '文本文件 (*.txt)')
    
    def onSaveFileAs(self):
        QFileDialog.getSaveFileName(self, '文件另存为', '', '文本文件 (*.txt)') 
        
    def btnShortcutChanged(self, ks):
        self.shortcutKey = ks  
    
    def OnShortcutSet(self):
        sel_idx = self.ui.cmbBox.currentIndex()
        if(sel_idx == 0):
            self.ui.btnOpenFile.setShortcut(self.shortcutKey) 
        else:
            self.ui.btnSaveFileAs.setShortcut(self.shortcutKey)
        
if __name__ == '__main__':
    app = QApplication(sys.argv)
    window = DemoKeySequenceEdit()
    window.show()
    sys.exit(app.exec())

运行结果如下图所示：

实战PyQt5: 029-快捷键编辑控件QKeySequenceEdit