QTextEdit将setLineWrapMode设置为NoWrap会导致很大的延迟。

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我正在使用 QTextEdit 来显示一个表格。

当我试图通过使用 setLineWrapMode(qtw.QTextEdit.NoWrap) 来禁用换行时，显示表格需要很多时间。

这是预期的行为吗？我怎样才能减少延迟呢？

最低限度的工作实例

import sys
from PyQt5 import QtWidgets as qtw
from PyQt5 import QtGui as qtg
from PyQt5 import QtCore as qtc
class MainWindow(qtw.QMainWindow):
    def __init__(self):
        super().__init__()
        textedit = qtw.QTextEdit()
        textedit.setReadOnly(True)
        textedit.setLineWrapMode(qtw.QTextEdit.NoWrap) #Commenting this line removes the delay
        headers = ["#", "Name", "Address","Website"]
        cursor = textedit.textCursor()
        tableFormat = qtg.QTextTableFormat()
        table=cursor.insertTable(201, 4, tableFormat)
        for header in headers:
            cursor.insertText(header)
            cell=table.cellAt(cursor)
            format = cell.format()
            format.setBackground(qtg.QColor("#CCE8FF"))
            cell.setFormat(format)
            cursor.movePosition(qtg.QTextCursor.NextCell)
        for i in range(200):
            cursor.insertText(str(i+1))
            cursor.movePosition(qtg.QTextCursor.NextCell)
            cursor.insertText('David')
            cursor.movePosition(qtg.QTextCursor.NextCell)
            cursor.insertText('6th Lane, 4th street, 9th state')
            cursor.movePosition(qtg.QTextCursor.NextCell)
            cursor.insertHtml('<a href="www.google.com">Google</a>')
            cursor.movePosition(qtg.QTextCursor.NextCell)
        self.setCentralWidget(textedit)
        self.show()
if __name__ == '__main__':
    app = qtw.QApplication(sys.argv)
    mw = MainWindow()
    sys.exit(app.exec())


         2
         
         个评论


           
            将
            
             textedit.setLineWrapMode (qtw.QTextEdit.NoWrap)
            
            行放在
            
             __init__
            
            方法中的最后。


           
            哇，这很有效。非常感谢。如果你把它作为答案，加上一些解释，我可以把它标记为接受。


         python


         pyqt


        1
        
        个回答


          已采纳


         0
         
         人赞同


          
           我假设在循环
           
            for i in range (200):
           
           中
每次表发生变化时，它都会检查
           
            QTextEdit.NoWrap
           
           是否被尊重。同时，很明显，它在当前存在的整个表上进行这种安装。
对不起，我的英语不好。
          
          
           把
           
            textedit.setLineWrapMode(qtw.QTextEdit.NoWrap)
           
           行放在
           
            __init__
           
           方法中的最后。
          
          import sys
from PyQt5 import QtWidgets as qtw
from PyQt5 import QtGui as qtg
from PyQt5 import QtCore as qtc
class MainWindow(qtw.QMainWindow):
    def __init__(self):
        super().__init__()
        textedit = qtw.QTextEdit()
        textedit.setReadOnly(True)
#        textedit.setLineWrapMode(qtw.QTextEdit.NoWrap) # Commenting this line removes the delay
        headers = ["#", "Name", "Address","Website"]
        cursor = textedit.textCursor()
        tableFormat = qtg.QTextTableFormat()
        table=cursor.insertTable(201, 4, tableFormat)
        for header in headers:
            cursor.insertText(header)
            cell=table.cellAt(cursor)
            format = cell.format()
            format.setBackground(qtg.QColor("#CCE8FF"))
            cell.setFormat(format)
            cursor.movePosition(qtg.QTextCursor.NextCell)
        for i in range(200):
            cursor.insertText(str(i+1))
            cursor.movePosition(qtg.QTextCursor.NextCell)
            cursor.insertText('David')
            cursor.movePosition(qtg.QTextCursor.NextCell)
            cursor.insertText('6th Lane, 4th street, 9th state')
            cursor.movePosition(qtg.QTextCursor.NextCell)
            cursor.insertHtml('<a href="www.google.com">Google</a>')
            cursor.movePosition(qtg.QTextCursor.NextCell)
        self.setCentralWidget(textedit)
#        self.show()
        textedit.setLineWrapMode(qtw.QTextEdit.NoWrap)                    # +++
if __name__ == '__main__':
    app = qtw.QApplication(sys.argv)