PyQt5是Digia的一套Qt5应用框架与python的结合，同时支持2.x和3.x。Qt库由Riverbank Computing开发，是最强大的GUI库之一。
>>> 今天，我们将尝试用pyqt5写一个文本编辑器。
效果如图：
支持以下功能：复制、剪切、粘帖、保存、全选、读取、撤回、前进、加粗、斜体、下划线、字体、字号、左中右对齐、打印。
>>> Tips：完整代码在本页最后~
一、安装模块
使用pip安装pyqt5：
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple pyqt5二、导入模块
导入所需模块：
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtPrintSupport import *
import os
import sys
import uuid三、初始化定义
首先，我们先初始化定义一些后文所需函数。这里如果有看不懂，看到后文就可以理解了。
FONT_SIZES = [7, 8, 9, 10, 11, 12, 13, 14, 18, 24, 36, 48, 64, 72, 96, 144, 288]
IMAGE_EXTENSIONS = ['.jpg','.png','.bmp']
HTML_EXTENSIONS = ['.htm', '.html']
def hexuuid():
return uuid.uuid4().hex
def splitext(p):
return os.path.splitext(p)[1].lower()
class TextEdit(QTextEdit):
def canInsertFromMimeData(self, source):
if source.hasImage():
return True
else:
return super(TextEdit, self).canInsertFromMimeData(source)
def insertFromMimeData(self, source):
cursor = self.textCursor()
document = self.document()
if source.hasUrls():
for u in source.urls():
file_ext = splitext(str(u.toLocalFile()))
if u.isLocalFile() and file_ext in IMAGE_EXTENSIONS:
image = QImage(u.toLocalFile())
document.addResource(QTextDocument.ImageResource, u, image)
cursor.insertImage(u.toLocalFile())
else:
break
else:
return
elif source.hasImage():
image = source.imageData()
uuid = hexuuid()
document.addResource(QTextDocument.ImageResource, uuid, image)
cursor.insertImage(uuid)
return
super(TextEdit, self).insertFromMimeData(source)四、设置主窗口
开始使用pyqt5，建立一个主窗口，添加按钮等元素位置。
class MainWindow(QMainWindow):
def __init__(self, *args, **kwargs):
super(MainWindow, self).__init__(*args, **kwargs)
layout = QVBoxLayout()
self.editor = TextEdit()
self.editor.setAutoFormatting(QTextEdit.AutoAll)
self.editor.selectionChanged.connect(self.update_format)
font = QFont('Times', 12)
self.editor.setFont(font)
self.editor.setFontPointSize(12)
self.path = None
layout.addWidget(self.editor)
container = QWidget()
container.setLayout(layout)
self.setCentralWidget(container)
self.status = QStatusBar()
self.setStatusBar(self.status)
file_toolbar = QToolBar("文件")
file_toolbar.setIconSize(QSize(14, 14))
self.addToolBar(file_toolbar)
file_menu = self.menuBar().addMenu("&文件")
open_file_action = QAction(QIcon(os.path.join('images', 'blue-folder-open-document.png')), "打开文件", self)
open_file_action.setStatusTip("从本地磁盘中读取文件..")
open_file_action.triggered.connect(self.file_open)
file_menu.addAction(open_file_action)
file_toolbar.addAction(open_file_action)
save_file_action = QAction(QIcon(os.path.join('images', 'disk.png')), "保存", self)
save_file_action.setStatusTip("保存到本地磁盘..")
save_file_action.triggered.connect(self.file_save)
file_menu.addAction(save_file_action)
file_toolbar.addAction(save_file_action)
saveas_file_action = QAction(QIcon(os.path.join('images', 'disk--pencil.png')), "另存为", self)
saveas_file_action.setStatusTip("另存为文件..")
saveas_file_action.triggered.connect(self.file_saveas)
file_menu.addAction(saveas_file_action)
file_toolbar.addAction(saveas_file_action)
print_action = QAction(QIcon(os.path.join('images', 'printer.png')), "打印", self)
print_action.setStatusTip("打印本页..")
print_action.triggered.connect(self.file_print)
file_menu.addAction(print_action)
file_toolbar.addAction(print_action)
edit_toolbar = QToolBar("编辑")
edit_toolbar.setIconSize(QSize(16, 16))
self.addToolBar(edit_toolbar)
edit_menu = self.menuBar().addMenu("&编辑")
undo_action = QAction(QIcon(os.path.join('images', 'arrow-curve-180-left.png')), "撤回", self)
undo_action.setStatusTip("撤回上一个操作..")
undo_action.triggered.connect(self.editor.undo)
edit_menu.addAction(undo_action)
redo_action = QAction(QIcon(os.path.join('images', 'arrow-curve.png')), "重做", self)
redo_action.setStatusTip("重做撤回的操作..")
redo_action.triggered.connect(self.editor.redo)
edit_toolbar.addAction(redo_action)
edit_menu.addAction(redo_action)
edit_menu.addSeparator()
cut_action = QAction(QIcon(os.path.join('images', 'scissors.png')), "剪切", self)
cut_action.setStatusTip("剪切选定内容..")
cut_action.setShortcut(QKeySequence.Cut)
cut_action.triggered.connect(self.editor.cut)
edit_toolbar.addAction(cut_action)
edit_menu.addAction(cut_action)
copy_action = QAction(QIcon(os.path.join('images', 'document-copy.png')), "复制", self)
copy_action.setStatusTip("复制选定内容..")
cut_action.setShortcut(QKeySequence.Copy)
copy_action.triggered.connect(self.editor.copy)
edit_toolbar.addAction(copy_action)
edit_menu.addAction(copy_action)
paste_action = QAction(QIcon(os.path.join('images', 'clipboard-paste-document-text.png')), "粘帖", self)
paste_action.setStatusTip("从剪贴板粘帖..")
cut_action.setShortcut(QKeySequence.Paste)
paste_action.triggered.connect(self.editor.paste)
edit_toolbar.addAction(paste_action)
edit_menu.addAction(paste_action)
select_action = QAction(QIcon(os.path.join('images', 'selection-input.png')), "全选", self)
select_action.setStatusTip("全选所有文字..")
cut_action.setShortcut(QKeySequence.SelectAll)
select_action.triggered.connect(self.editor.selectAll)
edit_menu.addAction(select_action)
edit_menu.addSeparator()
wrap_action = QAction(QIcon(os.path.join('images', 'arrow-continue.png')), "自动换行", self)
wrap_action.setStatusTip("当文字长度超过边框大小时自动换行..")
wrap_action.setCheckable(True)
wrap_action.setChecked(True)
wrap_action.triggered.connect(self.edit_toggle_wrap)
edit_menu.addAction(wrap_action)
format_toolbar = QToolBar("格式")
format_toolbar.setIconSize(QSize(16, 16))
self.addToolBar(format_toolbar)
format_menu = self.menuBar().addMenu("&格式")
self.fonts = QFontComboBox()
self.fonts.currentFontChanged.connect(self.editor.setCurrentFont)
format_toolbar.addWidget(self.fonts)
self.fontsize = QComboBox()
self.fontsize.addItems([str(s) for s in FONT_SIZES])
self.fontsize.currentIndexChanged[str].connect(lambda s: self.editor.setFontPointSize(float(s)) )
format_toolbar.addWidget(self.fontsize)
self.bold_action = QAction(QIcon(os.path.join('images', 'edit-bold.png')), "加粗", self)
self.bold_action.setStatusTip("加粗选定内容..")
self.bold_action.setShortcut(QKeySequence.Bold)
self.bold_action.setCheckable(True)
self.bold_action.toggled.connect(lambda x: self.editor.setFontWeight(QFont.Bold if x else QFont.Normal))
format_toolbar.addAction(self.bold_action)
format_menu.addAction(self.bold_action)
self.italic_action = QAction(QIcon(os.path.join('images', 'edit-italic.png')), "斜体", self)
self.italic_action.setStatusTip("将选定内容设为斜体..")
self.italic_action.setShortcut(QKeySequence.Italic)
self.italic_action.setCheckable(True)
self.italic_action.toggled.connect(self.editor.setFontItalic)
format_toolbar.addAction(self.italic_action)
format_menu.addAction(self.italic_action)
self.underline_action = QAction(QIcon(os.path.join('images', 'edit-underline.png')), "下划线", self)
self.underline_action.setStatusTip("将选定内容加下划线..")
self.underline_action.setShortcut(QKeySequence.Underline)
self.underline_action.setCheckable(True)
self.underline_action.toggled.connect(self.editor.setFontUnderline)
format_toolbar.addAction(self.underline_action)
format_menu.addAction(self.underline_action)
format_menu.addSeparator()
self.alignl_action = QAction(QIcon(os.path.join('images', 'edit-alignment.png')), "靠左对齐", self)
self.alignl_action.setStatusTip("将文本靠左对齐..")
self.alignl_action.setCheckable(True)
self.alignl_action.triggered.connect(lambda: self.editor.setAlignment(Qt.AlignLeft))
format_toolbar.addAction(self.alignl_action)
format_menu.addAction(self.alignl_action)
self.alignc_action = QAction(QIcon(os.path.join('images', 'edit-alignment-center.png')), "居中对齐", self)
self.alignc_action.setStatusTip("将文本居中对齐..")
self.alignc_action.setCheckable(True)
self.alignc_action.triggered.connect(lambda: self.editor.setAlignment(Qt.AlignCenter))
format_toolbar.addAction(self.alignc_action)
format_menu.addAction(self.alignc_action)
self.alignr_action = QAction(QIcon(os.path.join('images', 'edit-alignment-right.png')), "靠右对齐", self)
self.alignr_action.setStatusTip("将文本靠右对齐..")
self.alignr_action.setCheckable(True)
self.alignr_action.triggered.connect(lambda: self.editor.setAlignment(Qt.AlignRight))
format_toolbar.addAction(self.alignr_action)
format_menu.addAction(self.alignr_action)
self.alignj_action = QAction(QIcon(os.path.join('images', 'edit-alignment-justify.png')), "对齐", self)
self.alignj_action.setStatusTip("分散对齐文本..")
self.alignj_action.setCheckable(True)
self.alignj_action.triggered.connect(lambda: self.editor.setAlignment(Qt.AlignJustify))
format_toolbar.addAction(self.alignj_action)
format_menu.addAction(self.alignj_action)
format_group = QActionGroup(self)
format_group.setExclusive(True)
format_group.addAction(self.alignl_action)
format_group.addAction(self.alignc_action)
format_group.addAction(self.alignr_action)
format_group.addAction(self.alignj_action)
format_menu.addSeparator()
self._format_actions = [
self.fonts,
self.fontsize,
self.bold_action,
self.italic_action,
self.underline_action]
self.update_format()
self.update_title()
self.show()五、定义功能
也是在window的class里，我们定义保存等等的功能
def block_signals(self, objects, b):
for o in objects:
o.blockSignals(b)
def update_format(self):
self.block_signals(self._format_actions, True)
self.fonts.setCurrentFont(self.editor.currentFont())
self.fontsize.setCurrentText(str(int(self.editor.fontPointSize())))
self.italic_action.setChecked(self.editor.fontItalic())
self.underline_action.setChecked(self.editor.fontUnderline())
self.bold_action.setChecked(self.editor.fontWeight() == QFont.Bold)
self.alignl_action.setChecked(self.editor.alignment() == Qt.AlignLeft)
self.alignc_action.setChecked(self.editor.alignment() == Qt.AlignCenter)
self.alignr_action.setChecked(self.editor.alignment() == Qt.AlignRight)
self.alignj_action.setChecked(self.editor.alignment() == Qt.AlignJustify)
self.block_signals(self._format_actions, False)
def dialog_critical(self, s):
dlg = QMessageBox(self)
dlg.setText(s)
dlg.setIcon(QMessageBox.Critical)
dlg.show()
def file_open(self):
path, _ = QFileDialog.getOpenFileName(self, "Open file", "", "HTML documents (*.html);Text documents (*.txt);All files (*.*)")
try:
with open(path, 'rU') as f:
text = f.read()
except Exception as e:
self.dialog_critical(str(e))
else:
self.path = path
self.editor.setText(text)
self.update_title()
def file_save(self):
if self.path is None:
return self.file_saveas()
text = self.editor.toHtml() if splitext(self.path) in HTML_EXTENSIONS else self.editor.toPlainText()
try:
with open(self.path, 'w') as f:
f.write(text)
except Exception as e:
self.dialog_critical(str(e))
def file_saveas(self):
path, _ = QFileDialog.getSaveFileName(self, "Save file", "", "HTML documents (*.html);Text documents (*.txt);All files (*.*)")
if not path:
return
text = self.editor.toHtml() if splitext(path) in HTML_EXTENSIONS else self.editor.toPlainText()
try:
with open(path, 'w') as f:
f.write(text)
except Exception as e:
self.dialog_critical(str(e))
else:
self.path = path
self.update_title()
def file_print(self):
dlg = QPrintDialog()
if dlg.exec_():
self.editor.print_(dlg.printer())
def update_title(self):
self.setWindowTitle("%s - 轩氏记事本 XuanNotepad" % (os.path.basename(self.path) if self.path else "Untitled"))
def edit_toggle_wrap(self):
self.editor.setLineWrapMode( 1 if self.editor.lineWrapMode() == 0 else 0 )六、生成窗口
最后一步，生成窗口（这里的applicationname你可以改掉）：
if __name__ == '__main__':
app = QApplication(sys.argv)
app.setApplicationName("轩氏记事本 XuanNotepad")
window = MainWindow()
window.resize(1300,750)
app.exec_()七、最终效果
运行程序，我们来看一下效果如何！
完整代码
最后送上完整代码：
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtPrintSupport import *
import os
import sys
import uuid
FONT_SIZES = [7, 8, 9, 10, 11, 12, 13, 14, 18, 24, 36, 48, 64, 72, 96, 144, 288]
IMAGE_EXTENSIONS = ['.jpg','.png','.bmp']
HTML_EXTENSIONS = ['.htm', '.html']
def hexuuid():
return uuid.uuid4().hex
def splitext(p):
return os.path.splitext(p)[1].lower()
class TextEdit(QTextEdit):
def canInsertFromMimeData(self, source):
if source.hasImage():
return True
else:
return super(TextEdit, self).canInsertFromMimeData(source)
def insertFromMimeData(self, source):
cursor = self.textCursor()
document = self.document()
if source.hasUrls():
for u in source.urls():
file_ext = splitext(str(u.toLocalFile()))
if u.isLocalFile() and file_ext in IMAGE_EXTENSIONS:
image = QImage(u.toLocalFile())
document.addResource(QTextDocument.ImageResource, u, image)
cursor.insertImage(u.toLocalFile())
else:
break
else:
return
elif source.hasImage():
image = source.imageData()
uuid = hexuuid()
document.addResource(QTextDocument.ImageResource, uuid, image)
cursor.insertImage(uuid)
return
super(TextEdit, self).insertFromMimeData(source)
class MainWindow(QMainWindow):
def __init__(self, *args, **kwargs):
super(MainWindow, self).__init__(*args, **kwargs)
layout = QVBoxLayout()
self.editor = TextEdit()
self.editor.setAutoFormatting(QTextEdit.AutoAll)
self.editor.selectionChanged.connect(self.update_format)
font = QFont('Times', 12)
self.editor.setFont(font)
self.editor.setFontPointSize(12)
self.path = None
layout.addWidget(self.editor)
container = QWidget()
container.setLayout(layout)
self.setCentralWidget(container)
self.status = QStatusBar()
self.setStatusBar(self.status)
file_toolbar = QToolBar("文件")
file_toolbar.setIconSize(QSize(14, 14))
self.addToolBar(file_toolbar)
file_menu = self.menuBar().addMenu("&文件")
open_file_action = QAction(QIcon(os.path.join('images', 'blue-folder-open-document.png')), "打开文件", self)
open_file_action.setStatusTip("从本地磁盘中读取文件..")
open_file_action.triggered.connect(self.file_open)
file_menu.addAction(open_file_action)
file_toolbar.addAction(open_file_action)
save_file_action = QAction(QIcon(os.path.join('images', 'disk.png')), "保存", self)
save_file_action.setStatusTip("保存到本地磁盘..")
save_file_action.triggered.connect(self.file_save)
file_menu.addAction(save_file_action)
file_toolbar.addAction(save_file_action)
saveas_file_action = QAction(QIcon(os.path.join('images', 'disk--pencil.png')), "另存为", self)
saveas_file_action.setStatusTip("另存为文件..")
saveas_file_action.triggered.connect(self.file_saveas)
file_menu.addAction(saveas_file_action)
file_toolbar.addAction(saveas_file_action)
print_action = QAction(QIcon(os.path.join('images', 'printer.png')), "打印", self)
print_action.setStatusTip("打印本页..")
print_action.triggered.connect(self.file_print)
file_menu.addAction(print_action)
file_toolbar.addAction(print_action)
edit_toolbar = QToolBar("编辑")
edit_toolbar.setIconSize(QSize(16, 16))
self.addToolBar(edit_toolbar)
edit_menu = self.menuBar().addMenu("&编辑")
undo_action = QAction(QIcon(os.path.join('images', 'arrow-curve-180-left.png')), "撤回", self)
undo_action.setStatusTip("撤回上一个操作..")
undo_action.triggered.connect(self.editor.undo)
edit_menu.addAction(undo_action)
redo_action = QAction(QIcon(os.path.join('images', 'arrow-curve.png')), "重做", self)
redo_action.setStatusTip("重做撤回的操作..")
redo_action.triggered.connect(self.editor.redo)
edit_toolbar.addAction(redo_action)
edit_menu.addAction(redo_action)
edit_menu.addSeparator()
cut_action = QAction(QIcon(os.path.join('images', 'scissors.png')), "剪切", self)
cut_action.setStatusTip("剪切选定内容..")
cut_action.setShortcut(QKeySequence.Cut)
cut_action.triggered.connect(self.editor.cut)
edit_toolbar.addAction(cut_action)
edit_menu.addAction(cut_action)
copy_action = QAction(QIcon(os.path.join('images', 'document-copy.png')), "复制", self)
copy_action.setStatusTip("复制选定内容..")
cut_action.setShortcut(QKeySequence.Copy)
copy_action.triggered.connect(self.editor.copy)
edit_toolbar.addAction(copy_action)
edit_menu.addAction(copy_action)
paste_action = QAction(QIcon(os.path.join('images', 'clipboard-paste-document-text.png')), "粘帖", self)
paste_action.setStatusTip("从剪贴板粘帖..")
cut_action.setShortcut(QKeySequence.Paste)
paste_action.triggered.connect(self.editor.paste)
edit_toolbar.addAction(paste_action)
edit_menu.addAction(paste_action)
select_action = QAction(QIcon(os.path.join('images', 'selection-input.png')), "全选", self)
select_action.setStatusTip("全选所有文字..")
cut_action.setShortcut(QKeySequence.SelectAll)
select_action.triggered.connect(self.editor.selectAll)
edit_menu.addAction(select_action)
edit_menu.addSeparator()
wrap_action = QAction(QIcon(os.path.join('images', 'arrow-continue.png')), "自动换行", self)
wrap_action.setStatusTip("当文字长度超过边框大小时自动换行..")
wrap_action.setCheckable(True)
wrap_action.setChecked(True)
wrap_action.triggered.connect(self.edit_toggle_wrap)
edit_menu.addAction(wrap_action)
format_toolbar = QToolBar("格式")
format_toolbar.setIconSize(QSize(16, 16))
self.addToolBar(format_toolbar)
format_menu = self.menuBar().addMenu("&格式")
self.fonts = QFontComboBox()
self.fonts.currentFontChanged.connect(self.editor.setCurrentFont)
format_toolbar.addWidget(self.fonts)
self.fontsize = QComboBox()
self.fontsize.addItems([str(s) for s in FONT_SIZES])
self.fontsize.currentIndexChanged[str].connect(lambda s: self.editor.setFontPointSize(float(s)) )
format_toolbar.addWidget(self.fontsize)
self.bold_action = QAction(QIcon(os.path.join('images', 'edit-bold.png')), "加粗", self)
self.bold_action.setStatusTip("加粗选定内容..")
self.bold_action.setShortcut(QKeySequence.Bold)
self.bold_action.setCheckable(True)
self.bold_action.toggled.connect(lambda x: self.editor.setFontWeight(QFont.Bold if x else QFont.Normal))
format_toolbar.addAction(self.bold_action)
format_menu.addAction(self.bold_action)
self.italic_action = QAction(QIcon(os.path.join('images', 'edit-italic.png')), "斜体", self)
self.italic_action.setStatusTip("将选定内容设为斜体..")
self.italic_action.setShortcut(QKeySequence.Italic)
self.italic_action.setCheckable(True)
self.italic_action.toggled.connect(self.editor.setFontItalic)
format_toolbar.addAction(self.italic_action)
format_menu.addAction(self.italic_action)
self.underline_action = QAction(QIcon(os.path.join('images', 'edit-underline.png')), "下划线", self)
self.underline_action.setStatusTip("将选定内容加下划线..")
self.underline_action.setShortcut(QKeySequence.Underline)
self.underline_action.setCheckable(True)
self.underline_action.toggled.connect(self.editor.setFontUnderline)
format_toolbar.addAction(self.underline_action)
format_menu.addAction(self.underline_action)
format_menu.addSeparator()
self.alignl_action = QAction(QIcon(os.path.join('images', 'edit-alignment.png')), "靠左对齐", self)
self.alignl_action.setStatusTip("将文本靠左对齐..")
self.alignl_action.setCheckable(True)
self.alignl_action.triggered.connect(lambda: self.editor.setAlignment(Qt.AlignLeft))
format_toolbar.addAction(self.alignl_action)
format_menu.addAction(self.alignl_action)
self.alignc_action = QAction(QIcon(os.path.join('images', 'edit-alignment-center.png')), "居中对齐", self)
self.alignc_action.setStatusTip("将文本居中对齐..")
self.alignc_action.setCheckable(True)
self.alignc_action.triggered.connect(lambda: self.editor.setAlignment(Qt.AlignCenter))
format_toolbar.addAction(self.alignc_action)
format_menu.addAction(self.alignc_action)
self.alignr_action = QAction(QIcon(os.path.join('images', 'edit-alignment-right.png')), "靠右对齐", self)
self.alignr_action.setStatusTip("将文本靠右对齐..")
self.alignr_action.setCheckable(True)
self.alignr_action.triggered.connect(lambda: self.editor.setAlignment(Qt.AlignRight))
format_toolbar.addAction(self.alignr_action)
format_menu.addAction(self.alignr_action)
self.alignj_action = QAction(QIcon(os.path.join('images', 'edit-alignment-justify.png')), "对齐", self)
self.alignj_action.setStatusTip("分散对齐文本..")
self.alignj_action.setCheckable(True)
self.alignj_action.triggered.connect(lambda: self.editor.setAlignment(Qt.AlignJustify))
format_toolbar.addAction(self.alignj_action)
format_menu.addAction(self.alignj_action)
format_group = QActionGroup(self)
format_group.setExclusive(True)
format_group.addAction(self.alignl_action)
format_group.addAction(self.alignc_action)
format_group.addAction(self.alignr_action)
format_group.addAction(self.alignj_action)
format_menu.addSeparator()
self._format_actions = [
self.fonts,
self.fontsize,
self.bold_action,
self.italic_action,
self.underline_action]
self.update_format()
self.update_title()
self.show()
def block_signals(self, objects, b):
for o in objects:
o.blockSignals(b)
def update_format(self):
self.block_signals(self._format_actions, True)
self.fonts.setCurrentFont(self.editor.currentFont())
self.fontsize.setCurrentText(str(int(self.editor.fontPointSize())))
self.italic_action.setChecked(self.editor.fontItalic())
self.underline_action.setChecked(self.editor.fontUnderline())
self.bold_action.setChecked(self.editor.fontWeight() == QFont.Bold)
self.alignl_action.setChecked(self.editor.alignment() == Qt.AlignLeft)
self.alignc_action.setChecked(self.editor.alignment() == Qt.AlignCenter)
self.alignr_action.setChecked(self.editor.alignment() == Qt.AlignRight)
self.alignj_action.setChecked(self.editor.alignment() == Qt.AlignJustify)
self.block_signals(self._format_actions, False)
def dialog_critical(self, s):
dlg = QMessageBox(self)
dlg.setText(s)
dlg.setIcon(QMessageBox.Critical)
dlg.show()
def file_open(self):
path, _ = QFileDialog.getOpenFileName(self, "Open file", "", "HTML documents (*.html);Text documents (*.txt);All files (*.*)")
try:
with open(path, 'rU') as f:
text = f.read()
except Exception as e:
self.dialog_critical(str(e))
else:
self.path = path
self.editor.setText(text)
self.update_title()
def file_save(self):
if self.path is None:
return self.file_saveas()
text = self.editor.toHtml() if splitext(self.path) in HTML_EXTENSIONS else self.editor.toPlainText()
try:
with open(self.path, 'w') as f:
f.write(text)
except Exception as e:
self.dialog_critical(str(e))
def file_saveas(self):
path, _ = QFileDialog.getSaveFileName(self, "Save file", "", "HTML documents (*.html);Text documents (*.txt);All files (*.*)")
if not path:
return
text = self.editor.toHtml() if splitext(path) in HTML_EXTENSIONS else self.editor.toPlainText()
try:
with open(path, 'w') as f:
f.write(text)
except Exception as e:
self.dialog_critical(str(e))
else:
self.path = path
self.update_title()
def file_print(self):
dlg = QPrintDialog()
if dlg.exec_():
self.editor.print_(dlg.printer())
def update_title(self):
self.setWindowTitle("%s - 轩氏记事本 XuanNotepad" % (os.path.basename(self.path) if self.path else "Untitled"))
def edit_toggle_wrap(self):
self.editor.setLineWrapMode( 1 if self.editor.lineWrapMode() == 0 else 0 )
if __name__ == '__main__':
app = QApplication(sys.argv)
app.setApplicationName("轩氏记事本 XuanNotepad")
window = MainWindow()
window.resize(1300,750)
app.exec_()
>>> 本期pyqt5制作文本编辑器就到这里了，如有问题可以私聊。我们下期不见不散~
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