Pyqt4学习笔记-对话框(更新ing)

#!/usr/bin/python
# -*- coding: utf-8 -*-

import sys
from PyQt4 import QtGui
from PyQt4 import QtCore


class InputExample(QtGui.QWidget):

    def __init__(self):
        super(InputExample, self).__init__()

        self.initUI()

    def initUI(self):

        self.button = QtGui.QPushButton(‘Dialog‘, self)
        self.button.setFocusPolicy(QtCore.Qt.NoFocus)
        # 设置聚焦策略，NoFocus表示不接受焦点

        self.button.move(20, 20)
        self.connect(self.button, QtCore.SIGNAL(‘clicked()‘),
                     self.showDialog)
        self.setFocus()
        # 信号接收之后(调用方法中的组件)获取焦点？

        self.label = QtGui.QLineEdit(self)
        self.label.setFocusPolicy(QtCore.Qt.NoFocus)
        # 设置聚焦策略，NoFocus表示不接受焦点
        self.label.move(130, 22)

        self.setWindowTitle(‘InputDialog‘)
        self.setGeometry(300, 300, 350, 80)


    def showDialog(self):
        # 初始化输入框，定义输入框Title，提示字符
        text, ok = QtGui.QInputDialog.getText(self, ‘Input Dialog‘,
                                              ‘Enter your name:‘)

        # ok 在上面作为if的标识用，和显示出来的效果无关
        # 输入框显示的默认都是ok,cancel
        if ok:
            self.label.setText(str(text))
            # 如果点击确认，输入的值会出现在上面的label中


if __name__ == ‘__main__‘:

    app = QtGui.QApplication(sys.argv)
    ex = InputExample()
    ex.show()
    app.exec_()

#!/usr/bin/python
# -*- coding: utf-8 -*-

import sys
from PyQt4 import QtGui
from PyQt4 import QtCore


class OpenFileExample(QtGui.QMainWindow):

    def __init__(self):
        super(OpenFileExample, self).__init__()

        self.initUI()

    def initUI(self):

        self.textEdit = QtGui.QTextEdit()
        self.setCentralWidget(self.textEdit)
        self.statusBar()
        self.setFocus()

        openFile = QtGui.QAction(QtGui.QIcon(‘icons/open.png‘), ‘Open‘, self)
        openFile.setShortcut(‘Ctrl+O‘)
        openFile.setStatusTip(‘Open new File‘)
        self.connect(openFile, QtCore.SIGNAL(‘triggered()‘), self.showDialog)

        menubar = self.menuBar()
        fileMenu = menubar.addMenu(‘&File‘)
        fileMenu.addAction(openFile)

        self.setGeometry(300, 300, 350, 300)
        self.setWindowTitle(‘OpenFile‘)

    def showDialog(self):

        filename = QtGui.QFileDialog.getOpenFileName(self, ‘Open file‘,
                                                     ‘/home‘)
        # 第一个字符串是标题，第二个字符串指定对话框的工作目录，在windows下用/home也是可以的
        fname = open(filename)
        # 不能直接打开路径中包含中文的文件，会报错
        data = fname.read()
        # 读取文件
        self.textEdit.setText(data)
        # 显示在文本域中

app = QtGui.QApplication(sys.argv)
ex = OpenFileExample()
ex.show()
app.exec_()