datetime:2019/5/23 10:44

author:nzb

（带选择的）消息框提示框

import sys
from PyQt5.QtWidgets import QFileDialog,  QApplication, QMainWindow, QAction, QTextEdit, QFontDialog, QColorDialog, QMessageBox
from PyQt5 import QtGui,QtCore
from PyQt5.QtPrintSupport import QPrintDialog, QPrinter, QPrintPreviewDialog
from PyQt5.QtCore import QFileInfo


class UI_demo(QMainWindow):
    """用户界面"""
    def __init__(self):
        super().__init__()

        # 窗口信息
        self.title = 'PyQt5 Messagebox'
        self.left = 600
        self.top = 200
        self.width = 500
        self.height = 400
        self.iconName = '../img/home.ico'

        self.initWindow()

    def initWindow(self):

        # 窗口信息
        self.setWindowIcon(QtGui.QIcon(self.iconName))  # 图标设置
        self.setGeometry(self.left, self.top, self.width, self.height)  # 大小位置设置
        self.setWindowTitle(self.title)  # 窗口标题

        # 生成菜单栏
        self.CreateMenu()

        # 生成文档编辑
        self.createEditor()

        # 展示窗口
        self.show()

    def CreateMenu(self):
        """菜单栏"""
        mainMenu = self.menuBar()
        fileMenu = mainMenu.addMenu('File')
        editMenu = mainMenu.addMenu('Edit')
        viewMenu = mainMenu.addMenu('View')
        helpMenu = mainMenu.addMenu('Help')

        # 复制
        copyAction = QAction(QtGui.QIcon('../img/copy.ico'), 'Copy', self)
        copyAction.setShortcut("Ctrl+C")
        editMenu.addAction(copyAction)
        # 剪切
        cutAction = QAction(QtGui.QIcon('../img/cut.png'), 'Cut', self)
        cutAction.setShortcut("Ctrl+X")
        editMenu.addAction(cutAction)
        # 保存
        saveAction = QAction(QtGui.QIcon('../img/save.png'), 'Save', self)
        saveAction.setShortcut("Ctrl+S")
        editMenu.addAction(saveAction)
        # 打印
        printAction = QAction(QtGui.QIcon('../img/print.png'), "Print", self)
        printAction.triggered.connect(self.printDialog)
        fileMenu.addAction(printAction)
        # 打印预览
        printpreviewAction = QAction(QtGui.QIcon('../img/printpreview.png'), "PrintPreview", self)
        printpreviewAction.triggered.connect(self.printPreviewDialog)
        fileMenu.addAction(printpreviewAction)
        # pdf
        pdfAction = QAction(QtGui.QIcon('../img/pdf.png'), 'PDF', self)
        pdfAction.triggered.connect(self.pdfExport)
        fileMenu.addAction(pdfAction)
        # 退出
        exitAction = QAction(QtGui.QIcon('../img/exit.png'), 'Exit', self)
        exitAction.setShortcut("Ctrl+E")
        exitAction.triggered.connect(self.exitWindow)
        fileMenu.addAction(exitAction)
        # 黏贴
        pasteAction = QAction(QtGui.QIcon('../img/paste.png'), 'Paste', self)
        pasteAction.setShortcut("Ctrl+E")
        editMenu.addAction(pasteAction)
        # 字体
        fontAction = QAction(QtGui.QIcon('../img/font.png'), "Font", self)
        fontAction.setShortcut("Ctrl+F")
        fontAction.triggered.connect(self.fontDialog)
        viewMenu.addAction(fontAction)
        # 字体颜色
        colorAction = QAction(QtGui.QIcon('../img/color.png'), "Color", self)
        colorAction.triggered.connect(self.colorDialog)
        viewMenu.addAction(colorAction)
        # 消息框，提示框
        helpAction = QAction(QtGui.QIcon('../img/about.ico'), "About", self)
        helpAction.triggered.connect(self.AboutMessageBox)
        helpMenu.addAction(helpAction)
        # 带选择的消息框，提示框
        choiceAction = QAction(QtGui.QIcon('../img/about.ico'), "Choice Message", self)
        choiceAction.triggered.connect(self.choiceMessageBox)
        helpMenu.addAction(choiceAction)

        # 工具栏
        toolbar = self.addToolBar("Toolbar")
        toolbar.addAction(copyAction)
        toolbar.addAction(cutAction)
        toolbar.addAction(saveAction)
        toolbar.addAction(exitAction)
        toolbar.addAction(pasteAction)
        toolbar.addAction(fontAction)
        toolbar.addAction(colorAction)
        toolbar.addAction(printAction)
        toolbar.addAction(pdfAction)
        toolbar.addAction(helpAction)

    def exitWindow(self):
        """关闭窗口"""
        self.close()

    def createEditor(self):
        """文档编辑"""
        self.textEdit = QTextEdit(self)
        self.setCentralWidget(self.textEdit)

    def fontDialog(self):
        """字体对话框"""
        font, ok = QFontDialog.getFont()

        if ok:
            self.textEdit.setFont(font)

    def colorDialog(self):
        """颜色对话框"""
        color = QColorDialog.getColor()
        self.textEdit.setTextColor(color)

    def printDialog(self):
        """打印文本框"""
        printer = QPrinter(QPrinter.HighResolution)
        dialog = QPrintDialog(printer, self)

        if dialog.exec_() == QPrintDialog.Accepted:
            self.textEdit.print_(printer)

    def printPreviewDialog(self):
        """打印预览"""
        printer = QPrinter(QPrinter.HighResolution)
        previewDialog = QPrintPreviewDialog(printer, self)
        previewDialog.paintRequested.connect(self.printPreview)
        previewDialog.exec_()

    def printPreview(self, printer):
        """打印预览"""
        self.textEdit.print_(printer)

    def pdfExport(self):
        """导出PDF"""
        fn, _ = QFileDialog.getSaveFileName(self, "Export PDF", None, "PDF files (.pdf);;All Files()")

        if fn != '':

            if QFileInfo(fn).suffix() == "":
                fn += '.pdf'
            printer = QPrinter(QPrinter.HighResolution)
            printer.setOutputFormat(QPrinter.PdfFormat)
            printer.setOutputFileName(fn)
            self.textEdit.document().print_(printer)

    def AboutMessageBox(self):
        """消息框提示框"""
        message = QMessageBox.about(self, "About application", "this is simple texteditor application")

    def choiceMessageBox(self):
        """带选择的消息框和提示框"""
        message = QMessageBox.question(self, "Choice Message", 'Do you like PyQt5?',
                                       QMessageBox.Yes | QMessageBox.No)
        if message == QMessageBox.Yes:
            self.textEdit.setText("Yes I like PyQt5")
        else:
            self.textEdit.setText("No I don't like PyQt5")


if __name__ == "__main__":
    app = QApplication(sys.argv)
    ex = UI_demo()
    sys.exit(app.exec_())