我正在用python创建IDE，但在向选项卡添加文本时遇到了一些麻烦。
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，我试图添加一个标签页，其中包含我打开的文件self.tabs.addtab(text_widget, self.files[0])。
它确实创建了名称为self.files[0]的标签，但是内容不在其中。
答案 0 :(得分：2)
问题真的很简单，您不必要地创建了许多QPlainTextEdit，例如，在QPlainTextEdit方法中有一个openFile()传递给了方法addtab()，但是如果您检查方法addtab() MyTableWidget需要一个字符串而不是QPlainTextEdit，则QPlainTextEdit中不必要地有另一个MyTableWidget。
消除不必要的元素，我们将获得以下信息：
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_())