PyQt入门,一个简单的文本编辑器

使用QtDesigner创建UI界面

如图,给关闭按钮添加关闭操作/

form命名为:notepad

打开按钮命名为:button_open

保存按钮命名为:button_save

文件名保存为notepad.ui

2.使用pyuic编译ui文件为py文件 :

　　pyuic4 notepad.ui > notepad.py 

　　编译后为打开文件notepad.py,代码为:

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'C:\Users\Administrator\Desktop\testqt\edytor.ui'
#
# Created: Fri Aug 24 15:24:55 2012
#      by: PyQt4 UI code generator 4.9.1
#
# WARNING! All changes made in this file will be lost!

from PyQt4 import QtCore, QtGui

try:
    _fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
    _fromUtf8 = lambda s: s

class Ui_notepad(object):
    def setupUi(self, notepad):
    
        notepad.setObjectName(_fromUtf8("notepad"))
        notepad.resize(519, 372)
        
        self.button_open = QtGui.QPushButton(notepad)
        self.button_open.setGeometry(QtCore.QRect(80, 30, 111, 23))
        self.button_open.setObjectName(_fromUtf8("button_open"))
        
        self.pushButton_2 = QtGui.QPushButton(notepad)
        self.pushButton_2.setGeometry(QtCore.QRect(330, 30, 141, 23))
        self.pushButton_2.setObjectName(_fromUtf8("pushButton_2"))
        
        self.editor_window = QtGui.QTextEdit(notepad)
        self.editor_window.setGeometry(QtCore.QRect(80, 80, 391, 211))
        self.editor_window.setObjectName(_fromUtf8("editor_window"))
        
        self.button_save = QtGui.QPushButton(notepad)
        self.button_save.setGeometry(QtCore.QRect(210, 30, 101, 21))
        self.button_save.setObjectName(_fromUtf8("button_save"))

        self.retranslateUi(notepad)
        QtCore.QObject.connect(self.pushButton_2, QtCore.SIGNAL(_fromUtf8("clicked()")), notepad.close)
        QtCore.QMetaObject.connectSlotsByName(notepad)

    def retranslateUi(self, notepad):
        notepad.setWindowTitle(QtGui.QApplication.translate("notepad", "Form", None, QtGui.QApplication.UnicodeUTF8))
        self.button_open.setText(QtGui.QApplication.translate("notepad", "打开", None, QtGui.QApplication.UnicodeUTF8))
        self.pushButton_2.setText(QtGui.QApplication.translate("notepad", "关闭", None, QtGui.QApplication.UnicodeUTF8))
        self.button_save.setText(QtGui.QApplication.translate("notepad", "保存", None, QtGui.QApplication.UnicodeUTF8))

3. 写调用和UI的操作,建立test.py文件

test.py:

#--*-- coding:utf-8--

import sys
from PyQt4 import QtCore, QtGui 
from edytor import Ui_notepad 

class StartQt4(QtGui.QMainWindow): 
    def __init__(self, parent=None): 
        QtGui.QWidget.__init__(self, parent) 
        self.ui = Ui_notepad() 
        self.ui.setupUi(self) 
        QtCore.QObject.connect(self.ui.button_open,QtCore.SIGNAL("clicked()"),self.file_dialog) 
        QtCore.QObject.connect(self.ui.button_save,QtCore.SIGNAL("clicked()"),self.file_save) 

    def file_save(self):   #保存文件
        from os.path import isfile 
        if isfile(self.filename): 
            file = open(self.filename,'w') 
            file.write(self.ui.editor_window.toPlainText()) 
            file.close() 

    def file_dialog(self):  #打开文件操作
        fd = QtGui.QFileDialog(self) 
        self.filename = fd.getOpenFileName() 
        from os.path import isfile 
        if isfile(self.filename): 
            text = open(self.filename).read() 
            self.ui.editor_window.setText(text) 

if __name__ == "__main__": 
    app = QtGui.QApplication(sys.argv) 
    myapp = StartQt4() 
    myapp.show() 
    sys.exit(app.exec_()) 
    
    

4. 运行test.py 文件即可使用了.