PyQt5，向选项卡添加文本不起作用
PyQt5, adding text to tabs doesn't work
我正在 python 中制作一个 IDE，但我在向我的选项卡中添加文本时遇到了一些问题。
添加标题有效，但在其中添加文本无效。
这是我的代码：
import sys
import sys
from subprocess import PIPE, Popen
import json
from pyautogui import hotkey
from PyQt5 import QtGui, QtPrintSupport
from PyQt5.QtCore import QRect, QRegExp, Qt
from PyQt5.QtGui import (QColor, QFont, QPainter,
QSyntaxHighlighter, QTextCharFormat, QTextCursor)
from PyQt5.QtWidgets import (QAction, QApplication, QDialog, QFileDialog, QPushButton,
QHBoxLayout, QInputDialog, QMainWindow,
QMessageBox, QPlainTextEdit, QVBoxLayout, QWidget, QTabWidget,
qApp, QMenuBar, QStatusBar)
lineBarColor = QColor(53, 53, 53)
lineHighlightColor = QColor('#00FF04')
class NumberBar(QWidget):
def __init__(self, parent=None):
super().__init__()
self.editor = parent
layout = QVBoxLayout()
self.setLayout(layout)
self.editor.blockCountChanged.connect(self.update_width)
self.editor.updateRequest.connect(self.update_on_scroll)
self.update_width('1')
def mousePressEvent(self, QMouseEvent):
print("class NumberBar(QWidget):mousePressEvent")
def update_on_scroll(self, rect, scroll):
if self.isVisible():
if scroll:
self.scroll(0, scroll)
else:
self.update()
def update_width(self, string):
width = self.fontMetrics().width(str(string)) + 10
print("update_width:width:" + str(width))
if self.width() != width:
self.setFixedWidth(width)
def paintEvent(self, event):
if self.isVisible():
block = self.editor.firstVisibleBlock()
height = self.fontMetrics().height()
number = block.blockNumber()
painter = QPainter(self)
painter.fillRect(event.rect(), lineBarColor)
painter.drawRect(0, 0, event.rect().width() - 1, event.rect().height() - 1)
font = painter.font()
current_block = self.editor.textCursor().block().blockNumber() + 1
while block.isValid():
block_geometry = self.editor.blockBoundingGeometry(block)
offset = self.editor.contentOffset()
block_top = block_geometry.translated(offset).top()
number += 1
rect = QRect(0, block_top, self.width() - 5, height)
if number == current_block:
font.setBold(True)
else:
font.setBold(False)
painter.setFont(font)
painter.drawText(rect, Qt.AlignRight, '%i' % number)
if block_top > event.rect().bottom():
break
block = block.next()
painter.end()
class Content(QWidget):
def __init__(self, text):
super(Content, self).__init__()
self.editor = QPlainTextEdit()
# Create a layout for the line numbers
self.hbox = QHBoxLayout()
self.setLayout(self.hbox)
self.numbers = NumberBar(self.editor)
self.hbox.addWidget(self.numbers)
self.hbox.addWidget(self.editor)
class MyTableWidget(QWidget):
def __init__(self, parent):
super(QWidget, self).__init__(parent)
self.layout = QVBoxLayout(self)
self.editor = QPlainTextEdit()
# Initialize tab screen
self.tabs = QTabWidget()
self.tabs.resize(300, 200)
# Add tabs
self.tabs.setTabsClosable(True)
self.tabs.tabCloseRequested.connect(self.closeTab)
# Add tabs to widget
self.layout.addWidget(self.tabs)
self.setLayout(self.layout)
def closeTab(self, index):
tab = self.tabs.widget(index)
tab.deleteLater()
self.tabs.removeTab(index)
def addtab(self, content, fileName):
self.tabs.addTab(Content(str(content)), str(fileName))
class Main(QMainWindow):
def __init__(self, parent=None):
super(Main, self).__init__(parent)
self.open()
self.tabs = MyTableWidget(self)
#self.tabs.addtab("nga", "sa")
self.setCentralWidget(self.tabs)
self.initUI()
self.show()
def initUI(self):
self.statusBar()
menu = self.menuBar()
fileMenu = menu.addMenu('File')
fileMenu.addAction(self.openAct)
self.resize(800, 600)
def closeTab(self, index):
tab = self.tabs.widget(index)
tab.deleteLater()
self.tabs.removeTab(index)
def buttonClicked(self):
self.tabs.addTab(Content("smalltext2"), "sadsad")
def open(self):
self.openAct = QAction('Open...', self)
self.openAct.setShortcut('Ctrl+O')
self.openAct.setStatusTip('Open a file')
self.is_opened = False
self.openAct.triggered.connect(self.openFile)
def openFile(self):
options = QFileDialog.Options()
self.files, _ = QFileDialog.getOpenFileNames(
self, 'Open a file', '',
'All Files (*);;Python Files (*.py);;Text Files (*.txt)',
options=options
)
self.files = self.files[0]
if self.files:
with open(self.files, 'r+') as file_o:
print(self.files)
text = file_o.read()
text_widget = QPlainTextEdit(self.tabs)
text_widget.setPlainText(text)
self.tabs.addtab(text_widget, self.files[0])
print(text)
if __name__ == '__main__':
with open("../config.json", "r") as jsonFile:
read = jsonFile.read()
data = json.loads(read)
app = QApplication(sys.argv)
app.setStyle('Fusion')
palette = QtGui.QPalette()
palette.setColor(QtGui.QPalette.Window, QColor(data["editor"][0]["windowColor"]))
palette.setColor(QtGui.QPalette.WindowText, QColor(data["editor"][0]["windowText"]))
palette.setColor(QtGui.QPalette.Base, QColor(data["editor"][0]["editorColor"]))
palette.setColor(QtGui.QPalette.AlternateBase, QColor(data["editor"][0]["alternateBase"]))
palette.setColor(QtGui.QPalette.ToolTipBase, QColor(data["editor"][0]["ToolTipBase"]))
palette.setColor(QtGui.QPalette.ToolTipText, QColor(data["editor"][0]["ToolTipText"]))
palette.setColor(QtGui.QPalette.Text, QColor(data["editor"][0]["editorText"]))
palette.setColor(QtGui.QPalette.Button, QColor(data["editor"][0]["buttonColor"]))
palette.setColor(QtGui.QPalette.ButtonText, QColor(data["editor"][0]["buttonTextColor"]))
palette.setColor(QtGui.QPalette.Highlight, QColor(data["editor"][0]["HighlightColor"]).lighter())
palette.setColor(QtGui.QPalette.HighlightedText, QColor(data["editor"][0]["HighlightedTextColor"]))
app.setPalette(palette)
ex = Main()
sys.exit(app.exec_())
在第 171 行，我试图添加一个包含我打开的文件内容的选项卡 self.tabs.addtab(text_widget, self.files[0])。
它确实创建了名称为 self.files[0] 的选项卡，但内容不在其中。
问题很简单，你创建了很多不必要的QPlainTextEdit，例如openFile()方法中有一个QPlainTextEdit，你传递给方法addtab()，但是如果你检查方法 addtab() MyTableWidget 需要一个字符串而不是 QPlainTextEdit，那么 MyTableWidget 中有另一个 QPlainTextEdit 是不必要的。
去掉不必要的元素我们得到如下：
import sys
from PyQt5.QtCore import Qt, QRect
from PyQt5.QtGui import QColor, QPainter
from PyQt5.QtWidgets import QApplication, QWidget, QMainWindow, QAction, \
QVBoxLayout, QTabWidget, QFileDialog, QPlainTextEdit, QHBoxLayout
lineBarColor = QColor(53, 53, 53)
lineHighlightColor = QColor('#00FF04')
class NumberBar(QWidget):
def __init__(self, parent=None):
super().__init__(parent)
self.editor = parent
layout = QVBoxLayout(self)
self.editor.blockCountChanged.connect(self.update_width)
self.editor.updateRequest.connect(self.update_on_scroll)
self.update_width('1')
def mousePressEvent(self, QMouseEvent):
print("class NumberBar(QWidget):mousePressEvent")
def update_on_scroll(self, rect, scroll):
if self.isVisible():
if scroll:
self.scroll(0, scroll)
else:
self.update()
def update_width(self, string):
width = self.fontMetrics().width(str(string)) + 10
print("update_width:width:" + str(width))
if self.width() != width:
self.setFixedWidth(width)
def paintEvent(self, event):
if self.isVisible():
block = self.editor.firstVisibleBlock()
height = self.fontMetrics().height()
number = block.blockNumber()
painter = QPainter(self)
painter.fillRect(event.rect(), lineBarColor)
painter.drawRect(0, 0, event.rect().width() - 1, event.rect().height() - 1)
font = painter.font()
current_block = self.editor.textCursor().block().blockNumber() + 1
while block.isValid():
block_geometry = self.editor.blockBoundingGeometry(block)
offset = self.editor.contentOffset()
block_top = block_geometry.translated(offset).top()
number += 1
rect = QRect(0, block_top, self.width() - 5, height)
if number == current_block:
font.setBold(True)
else:
font.setBold(False)
painter.setFont(font)
painter.drawText(rect, Qt.AlignRight, '%i' % number)
if block_top > event.rect().bottom():
break
block = block.next()
painter.end()
class Content(QWidget):
def __init__(self, text):
super(Content, self).__init__()
self.editor = QPlainTextEdit()
self.editor.setPlainText(text)
# Create a layout for the line numbers
self.hbox = QHBoxLayout(self)
self.numbers = NumberBar(self.editor)
self.hbox.addWidget(self.numbers)
self.hbox.addWidget(self.editor)
class MyTableWidget(QWidget):
def __init__(self, parent=None):
super(QWidget, self).__init__(parent)
self.layout = QVBoxLayout(self)
# Initialize tab screen
self.tabs = QTabWidget()
self.tabs.resize(300, 200)
# Add tabs
self.tabs.setTabsClosable(True)
self.tabs.tabCloseRequested.connect(self.closeTab)
# Add tabs to widget
self.layout.addWidget(self.tabs)
self.setLayout(self.layout)
def closeTab(self, index):
tab = self.tabs.widget(index)
tab.deleteLater()
self.tabs.removeTab(index)
def addtab(self, content, fileName):
self.tabs.addTab(Content(str(content)), str(fileName))
class Main(QMainWindow):
def __init__(self, parent=None):
super(Main, self).__init__(parent)
self.open()
self.tabs = MyTableWidget()
#self.tabs.addtab("nga", "sa")
self.setCentralWidget(self.tabs)
self.initUI()
self.show()
def initUI(self):
self.statusBar()
menu = self.menuBar()
fileMenu = menu.addMenu('File')
fileMenu.addAction(self.openAct)
self.resize(800, 600)
def closeTab(self, index):
tab = self.tabs.widget(index)
tab.deleteLater()
self.tabs.removeTab(index)
def buttonClicked(self):
self.tabs.addTab(Content("smalltext2"), "sadsad")
def open(self):
self.openAct = QAction('Open...', self)
self.openAct.setShortcut('Ctrl+O')
self.openAct.setStatusTip('Open a file')
self.is_opened = False
self.openAct.triggered.connect(self.openFile)
def openFile(self):
options = QFileDialog.Options()
filenames, _ = QFileDialog.getOpenFileNames(
self, 'Open a file', '',
'All Files (*);;Python Files (*.py);;Text Files (*.txt)',
options=options
)
if filenames:
for filename in filenames:
with open(filename, 'r+') as file_o:
text = file_o.read()
self.tabs.addtab(text, filename)
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Main()
sys.exit(app.exec_())
我正在 python 中制作一个 IDE，但我在向我的选项卡中添加文本时遇到了一些问题。
添加标题有效，但在其中添加文本无效。
这是我的代码：
import sys
import sys
from subprocess import PIPE, Popen
import json
from pyautogui import hotkey
from PyQt5 import QtGui, QtPrintSupport
from PyQt5.QtCore import QRect, QRegExp, Qt
from PyQt5.QtGui import (QColor, QFont, QPainter,
QSyntaxHighlighter, QTextCharFormat, QTextCursor)
from PyQt5.QtWidgets import (QAction, QApplication, QDialog, QFileDialog, QPushButton,
QHBoxLayout, QInputDialog, QMainWindow,
QMessageBox, QPlainTextEdit, QVBoxLayout, QWidget, QTabWidget,
qApp, QMenuBar, QStatusBar)
lineBarColor = QColor(53, 53, 53)
lineHighlightColor = QColor('#00FF04')
class NumberBar(QWidget):
def __init__(self, parent=None):
super().__init__()
self.editor = parent
layout = QVBoxLayout()
self.setLayout(layout)
self.editor.blockCountChanged.connect(self.update_width)
self.editor.updateRequest.connect(self.update_on_scroll)
self.update_width('1')
def mousePressEvent(self, QMouseEvent):
print("class NumberBar(QWidget):mousePressEvent")
def update_on_scroll(self, rect, scroll):
if self.isVisible():
if scroll:
self.scroll(0, scroll)
else:
self.update()
def update_width(self, string):
width = self.fontMetrics().width(str(string)) + 10
print("update_width:width:" + str(width))
if self.width() != width:
self.setFixedWidth(width)
def paintEvent(self, event):
if self.isVisible():
block = self.editor.firstVisibleBlock()
height = self.fontMetrics().height()
number = block.blockNumber()
painter = QPainter(self)
painter.fillRect(event.rect(), lineBarColor)
painter.drawRect(0, 0, event.rect().width() - 1, event.rect().height() - 1)
font = painter.font()
current_block = self.editor.textCursor().block().blockNumber() + 1
while block.isValid():
block_geometry = self.editor.blockBoundingGeometry(block)
offset = self.editor.contentOffset()
block_top = block_geometry.translated(offset).top()
number += 1
rect = QRect(0, block_top, self.width() - 5, height)
if number == current_block:
font.setBold(True)
else:
font.setBold(False)
painter.setFont(font)
painter.drawText(rect, Qt.AlignRight, '%i' % number)
if block_top > event.rect().bottom():
break
block = block.next()
painter.end()
class Content(QWidget):
def __init__(self, text):
super(Content, self).__init__()
self.editor = QPlainTextEdit()
# Create a layout for the line numbers
self.hbox = QHBoxLayout()
self.setLayout(self.hbox)
self.numbers = NumberBar(self.editor)
self.hbox.addWidget(self.numbers)
self.hbox.addWidget(self.editor)
class MyTableWidget(QWidget):
def __init__(self, parent):
super(QWidget, self).__init__(parent)
self.layout = QVBoxLayout(self)
self.editor = QPlainTextEdit()
# Initialize tab screen
self.tabs = QTabWidget()
self.tabs.resize(300, 200)
# Add tabs
self.tabs.setTabsClosable(True)
self.tabs.tabCloseRequested.connect(self.closeTab)
# Add tabs to widget
self.layout.addWidget(self.tabs)
self.setLayout(self.layout)
def closeTab(self, index):
tab = self.tabs.widget(index)
tab.deleteLater()
self.tabs.removeTab(index)
def addtab(self, content, fileName):
self.tabs.addTab(Content(str(content)), str(fileName))
class Main(QMainWindow):
def __init__(self, parent=None):
super(Main, self).__init__(parent)
self.open()
self.tabs = MyTableWidget(self)
#self.tabs.addtab("nga", "sa")
self.setCentralWidget(self.tabs)
self.initUI()
self.show()
def initUI(self):
self.statusBar()
menu = self.menuBar()
fileMenu = menu.addMenu('File')
fileMenu.addAction(self.openAct)
self.resize(800, 600)
def closeTab(self, index):
tab = self.tabs.widget(index)
tab.deleteLater()
self.tabs.removeTab(index)
def buttonClicked(self):
self.tabs.addTab(Content("smalltext2"), "sadsad")
def open(self):
self.openAct = QAction('Open...', self)
self.openAct.setShortcut('Ctrl+O')
self.openAct.setStatusTip('Open a file')
self.is_opened = False
self.openAct.triggered.connect(self.openFile)
def openFile(self):
options = QFileDialog.Options()
self.files, _ = QFileDialog.getOpenFileNames(
self, 'Open a file', '',
'All Files (*);;Python Files (*.py);;Text Files (*.txt)',
options=options
)
self.files = self.files[0]
if self.files:
with open(self.files, 'r+') as file_o:
print(self.files)
text = file_o.read()
text_widget = QPlainTextEdit(self.tabs)
text_widget.setPlainText(text)
self.tabs.addtab(text_widget, self.files[0])
print(text)
if __name__ == '__main__':
with open("../config.json", "r") as jsonFile:
read = jsonFile.read()
data = json.loads(read)
app = QApplication(sys.argv)
app.setStyle('Fusion')
palette = QtGui.QPalette()
palette.setColor(QtGui.QPalette.Window, QColor(data["editor"][0]["windowColor"]))
palette.setColor(QtGui.QPalette.WindowText, QColor(data["editor"][0]["windowText"]))
palette.setColor(QtGui.QPalette.Base, QColor(data["editor"][0]["editorColor"]))
palette.setColor(QtGui.QPalette.AlternateBase, QColor(data["editor"][0]["alternateBase"]))
palette.setColor(QtGui.QPalette.ToolTipBase, QColor(data["editor"][0]["ToolTipBase"]))
palette.setColor(QtGui.QPalette.ToolTipText, QColor(data["editor"][0]["ToolTipText"]))
palette.setColor(QtGui.QPalette.Text, QColor(data["editor"][0]["editorText"]))
palette.setColor(QtGui.QPalette.Button, QColor(data["editor"][0]["buttonColor"]))
palette.setColor(QtGui.QPalette.ButtonText, QColor(data["editor"][0]["buttonTextColor"]))
palette.setColor(QtGui.QPalette.Highlight, QColor(data["editor"][0]["HighlightColor"]).lighter())
palette.setColor(QtGui.QPalette.HighlightedText, QColor(data["editor"][0]["HighlightedTextColor"]))
app.setPalette(palette)
ex = Main()
sys.exit(app.exec_())
在第 171 行，我试图添加一个包含我打开的文件内容的选项卡 self.tabs.addtab(text_widget, self.files[0])。
它确实创建了名称为 self.files[0] 的选项卡，但内容不在其中。
问题很简单，你创建了很多不必要的QPlainTextEdit，例如openFile()方法中有一个QPlainTextEdit，你传递给方法addtab()，但是如果你检查方法 addtab() MyTableWidget 需要一个字符串而不是 QPlainTextEdit，那么 MyTableWidget 中有另一个 QPlainTextEdit 是不必要的。
去掉不必要的元素我们得到如下：
import sys
from PyQt5.QtCore import Qt, QRect
from PyQt5.QtGui import QColor, QPainter
from PyQt5.QtWidgets import QApplication, QWidget, QMainWindow, QAction, \
QVBoxLayout, QTabWidget, QFileDialog, QPlainTextEdit, QHBoxLayout
lineBarColor = QColor(53, 53, 53)
lineHighlightColor = QColor('#00FF04')
class NumberBar(QWidget):
def __init__(self, parent=None):
super().__init__(parent)
self.editor = parent
layout = QVBoxLayout(self)
self.editor.blockCountChanged.connect(self.update_width)
self.editor.updateRequest.connect(self.update_on_scroll)
self.update_width('1')
def mousePressEvent(self, QMouseEvent):
print("class NumberBar(QWidget):mousePressEvent")
def update_on_scroll(self, rect, scroll):
if self.isVisible():
if scroll:
self.scroll(0, scroll)
else:
self.update()
def update_width(self, string):
width = self.fontMetrics().width(str(string)) + 10
print("update_width:width:" + str(width))
if self.width() != width:
self.setFixedWidth(width)
def paintEvent(self, event):
if self.isVisible():
block = self.editor.firstVisibleBlock()
height = self.fontMetrics().height()
number = block.blockNumber()
painter = QPainter(self)
painter.fillRect(event.rect(), lineBarColor)
painter.drawRect(0, 0, event.rect().width() - 1, event.rect().height() - 1)
font = painter.font()
current_block = self.editor.textCursor().block().blockNumber() + 1
while block.isValid():
block_geometry = self.editor.blockBoundingGeometry(block)
offset = self.editor.contentOffset()
block_top = block_geometry.translated(offset).top()
number += 1
rect = QRect(0, block_top, self.width() - 5, height)
if number == current_block:
font.setBold(True)
else:
font.setBold(False)
painter.setFont(font)
painter.drawText(rect, Qt.AlignRight, '%i' % number)
if block_top > event.rect().bottom():
break
block = block.next()
painter.end()
class Content(QWidget):
def __init__(self, text):
super(Content, self).__init__()
self.editor = QPlainTextEdit()
self.editor.setPlainText(text)
# Create a layout for the line numbers
self.hbox = QHBoxLayout(self)
self.numbers = NumberBar(self.editor)
self.hbox.addWidget(self.numbers)
self.hbox.addWidget(self.editor)
class MyTableWidget(QWidget):
def __init__(self, parent=None):
super(QWidget, self).__init__(parent)
self.layout = QVBoxLayout(self)
# Initialize tab screen
self.tabs = QTabWidget()
self.tabs.resize(300, 200)
# Add tabs
self.tabs.setTabsClosable(True)
self.tabs.tabCloseRequested.connect(self.closeTab)
# Add tabs to widget
self.layout.addWidget(self.tabs)
self.setLayout(self.layout)
def closeTab(self, index):
tab = self.tabs.widget(index)
tab.deleteLater()
self.tabs.removeTab(index)
def addtab(self, content, fileName):
self.tabs.addTab(Content(str(content)), str(fileName))
class Main(QMainWindow):
def __init__(self, parent=None):
super(Main, self).__init__(parent)
self.open()
self.tabs = MyTableWidget()
#self.tabs.addtab("nga", "sa")
self.setCentralWidget(self.tabs)
self.initUI()
self.show()
def initUI(self):
self.statusBar()
menu = self.menuBar()
fileMenu = menu.addMenu('File')
fileMenu.addAction(self.openAct)
self.resize(800, 600)
def closeTab(self, index):
tab = self.tabs.widget(index)
tab.deleteLater()
self.tabs.removeTab(index)
def buttonClicked(self):
self.tabs.addTab(Content("smalltext2"), "sadsad")
def open(self):
self.openAct = QAction('Open...', self)
self.openAct.setShortcut('Ctrl+O')
self.openAct.setStatusTip('Open a file')
self.is_opened = False
self.openAct.triggered.connect(self.openFile)
def openFile(self):
options = QFileDialog.Options()
filenames, _ = QFileDialog.getOpenFileNames(
self, 'Open a file', '',
'All Files (*);;Python Files (*.py);;Text Files (*.txt)',
options=options
)
if filenames:
for filename in filenames:
with open(filename, 'r+') as file_o:
text = file_o.read()
self.tabs.addtab(text, filename)
if __name__ == '__main__':
app = QApplication(sys.argv)
ex = Main()
sys.exit(app.exec_())