PyQt5，向标签添加文本不起作用 [英] PyQt5, adding text to tabs doesn't work

问题描述

我正在用 Python 制作一个 IDE，但在向选项卡中添加文本时遇到了一些问题.

I am making an IDE in python and I've had some trouble adding text to my tabs.

添加标题有效，但在其中添加文本无效.

Adding the title works but adding the text inside of it doesn't.

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]).

On the line 171 I'm trying to add a tab with the contents of the file I opened self.tabs.addtab(text_widget, self.files[0]).

它确实创建了名为 self.files[0] 的选项卡，但内容不在其中.

It does create the tab with the name self.files[0] but the content isn't inside of there.

推荐答案

问题很简单，你不必要地创建了很多 QPlainTextEdit，例如有一个 QPlainTextEdit 在您传递给方法 addtab() 的 openFile() 方法中，但是如果您检查方法 addtab() MyTableWidget 需要一个字符串而不是 QPlainTextEdit，在 MyTableWidget 中有另一个 QPlainTextEdit 不必要.

The problem is really simple, you are creating many QPlainTextEdits unnecessarily, for example there is a QPlainTextEdit in openFile() method that you pass to the method addtab(), but if you check the method addtab() MyTableWidget requires a string and not the QPlainTextEdit, There is another QPlainTextEdit in MyTableWidget unnecessarily.

消除不必要的元素，我们得到以下结果:

Eliminating the unnecessary elements we obtain the following:

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_())

这篇关于PyQt5，向标签添加文本不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！