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main.py
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#!/usr/bin/env python
# -*- coding:utf-8 -*-
import sys
from PyQt5.QtCore import QMimeData
from PyQt5.QtGui import QClipboard, QColor
from PyQt5.QtWidgets import QMainWindow, QApplication, QMessageBox, QFileDialog, QFontDialog, QColorDialog
from Qt5.editor import editorUI
class Editor(QMainWindow, editorUI.Ui_MainWindow):
def __init__(self):
super(Editor, self).__init__()
self.setupUi(self)
# 将textEdit设置为窗口的中心部件
self.setCentralWidget(self.textEdit)
# 定义判断文本是否已经保存，是否是第一次保存的变量以及文件保存路径
self.is_saved = True
self.is_first_saved = True
self.filepath = ""
# 剪贴板以及QMimeData类
self.mime_data = QMimeData()
self.clipboard = QApplication.clipboard()
assert isinstance(self.clipboard, QClipboard)
# 程序打开时状态栏要显示的状态
self.statusbar.showMessage("Ready to Compose")
self.filenew.triggered.connect(self.newfile)
self.fileopen.triggered.connect(self.openfile)
self.filesave.triggered.connect(lambda: self.savefile(self.textEdit.toHtml()))
self.othersave.triggered.connect(lambda: self.saveAsfile(self.textEdit.toHtml()))
self.close_action.triggered.connect(self.close_func)
self.copy_action.triggered.connect(self.copy_func)
self.cut_action.triggered.connect(self.cut_func)
self.paste_action.triggered.connect(self.paste_func)
self.font_action.triggered.connect(self.font_func)
self.color_action.triggered.connect(self.color_func)
self.aboutQt_action.triggered.connect(self.about_func)
self.textEdit.textChanged.connect(self.change_func)
def change_func(self):
# if self.textEdit.toPlainText():
# self.is_saved = False
# else:
# self.is_saved = True
self.is_saved = False
def newfile(self):
# 新建前我们要判断当前文本是否有保存
if not self.is_saved:
choice = QMessageBox.question(self, "保存", "您想要保存当前文件吗？",
QMessageBox.Yes|QMessageBox.No|QMessageBox.Cancel)
if choice == QMessageBox.Yes:
self.savefile(self.textEdit.toHtml())
self.textEdit.clear()
elif choice == QMessageBox.No:
self.textEdit.clear()
else:
pass
else:
self.textEdit.clear()
self.is_saved = True
self.is_first_saved = True
pass
def openfile(self):
# 打开新文件前我们要判断当前文本是否有保存
if not self.is_saved:
choice = QMessageBox.question(self, "保存", "您想要保存当前文件吗？",
QMessageBox.Yes | QMessageBox.No | QMessageBox.Cancel)
if choice == QMessageBox.Yes:
self.savefile(self.textEdit.toHtml())
self.filepath, ok = QFileDialog.getOpenFileName(self, '打开文件', './', "Files(*.html *.txt *.log)")
if ok and self.filepath:
with open(self.filepath, 'r') as f:
self.textEdit.setText(f.read())
self.is_saved = True
self.is_first_saved = False
elif choice == QMessageBox.No:
self.filepath, ok = QFileDialog.getOpenFileName(self, '打开文件', './', "Files(*.html *.txt *.log)")
if ok and self.filepath:
with open(self.filepath, 'r') as f:
self.textEdit.setText(f.read())
self.is_saved = True
self.is_first_saved = False
else:
pass
else:
self.filepath, ok = QFileDialog.getOpenFileName(self, '打开文件', './', "Files(*.html *.txt *.log)")
if ok and self.filepath:
with open(self.filepath, 'r') as f:
self.textEdit.setText(f.read())
self.is_saved = True
self.is_first_saved = False
pass
def savefile(self, text):
if self.is_first_saved:
self.saveAsfile(text)
else:
try:
with open(self.filepath, 'w') as f:
f.write(text)
self.is_saved = True
except OSError as e:
print(e.strerror)
pass
def saveAsfile(self, text):
self.filepath, ok = QFileDialog.getSaveFileName(self, '保存文件', './', "Files(*.txt *.html *.log)")
if ok and self.filepath:
with open(self.filepath, 'w') as f:
f.write(text)
self.is_saved = True
self.is_first_saved = False
pass
def close_func(self):
if not self.is_saved:
choice = QMessageBox.question(self, '关闭', "您将要退出，是否保存当前文件",
QMessageBox.Yes | QMessageBox.No | QMessageBox.Cancel)
if choice == QMessageBox.Yes:
self.savefile(self.textEdit.toHtml())
self.close()
elif choice == QMessageBox.No:
self.close()
else:
pass
else:
self.close()
pass
def copy_func(self):
# 由于我们的记事本涉及到颜色，所以不能调用QTextEdit的toPlainText()方法，因为该方法获取的是纯文本，
# 所以颜色会丢失掉。应该要调用toHtml()方法保留颜色；
# self.text_edit.textCursor()方法可以获取到文本编辑框当前的指针(类型为QTextCursor)，
# 此时再调用selection()方法可以获取到指针当前所选择的内容，但此时的类型为QTextDocumentFragment，
# 我们需要再调用toHtml()方法来获取到文本内容。
self.mime_data.setHtml(self.textEdit.textCursor().selection().toHtml())
self.clipboard.setMimeData(self.mime_data)
pass
def cut_func(self):
self.mime_data.setHtml(self.textEdit.textCursor().selection().toHtml())
self.clipboard.setMimeData(self.mime_data)
self.textEdit.textCursor().removeSelectedText() # 移除文本
pass
def paste_func(self):
# insetHtml()将剪贴板中的文本插入(该方法会在指针位置插入文本)
assert isinstance(self.clipboard, QClipboard)
if self.clipboard.mimeData().hasHtml():
self.textEdit.insertHtml(self.clipboard.mimeData().html())
pass
def font_func(self):
font, ok = QFontDialog().getFont()
if ok:
self.textEdit.setFont(font)
pass
def color_func(self):
color = QColorDialog().getColor()
assert isinstance(color, QColor)
if color.isValid():
self.textEdit.setTextColor(color)
pass
def about_func(self):
QMessageBox.aboutQt(self, 'About Qt')
pass
def closeEvent(self, e):
if not self.is_saved:
choice = QMessageBox.question(self, '关闭', "您将要退出，是否保存当前文件",
QMessageBox.Yes | QMessageBox.No | QMessageBox.Cancel)
if choice == QMessageBox.Yes:
self.savefile(self.textEdit.toHtml())
e.accept()
elif choice == QMessageBox.No:
e.accept()
else:
e.ignore()
else:
e.accept()
pass
if __name__ == '__main__':
app = QApplication(sys.argv)
win = Editor()
win.show()
sys.exit(app.exec_())