QtGui.QTextEdit 根据行包含的文本设置行颜色 [英] QtGui.QTextEdit set line color baced on what text the line contains

问题描述

这是我第一次使用 stackoverflow 为我的问题寻找答案.我正在使用 QtGui.QTextEdit 来显示类似于下面的文本，并希望根据它们是否包含某些文本来更改某些行上文本的颜色.

It's my first time using stackoverflow to find an answer, to my problems. I'm using a QtGui.QTextEdit to display text similar to below and would like to change the color of the text on some lines based on if they contain certain text.

以--[开头的行是蓝色的，包含[ERROR]的行是红色的.我目前有类似以下内容，

lines that start with --[ will be blue and lines that contain [ERROR] would be red. I currently have something like the following,

from PyQt4 import QtCore, QtGui, uic
import sys

class Log(QtGui.QWidget):
    def __init__(self, path=None, parent=None):
        QtGui.QMainWindow.__init__(self, parent)
        self.taskLog = QtGui.QTextEdit()
        self.taskLog.setLineWrapMode(False)
        vbox = QtGui.QVBoxLayout()
        vbox.addWidget(self.taskLog)
        self.setLayout(vbox)

        log = open("/net/test.log", 'r')
        self.taskLog.setText(log.read())
        log.close()


app = QtGui.QApplication(sys.argv)
wnd = Log()
wnd.show()
sys.exit(app.exec_())

文字现在看起来像这样

--[ Begin 
this is a test

[ERROR] this test failed.

--[ Command returned exit code 1

希望你们都能够帮助我更快地解决这个问题，并尝试自己解决.

Hopefully you all will be able to help me work this out a lot faster that, trying to work it out my self.

谢谢，标记

推荐答案

这可以通过 QSyntaxHighlighter.这是一个简单的演示:

This can be done quite easily with QSyntaxHighlighter. Here's a simple demo:

from PyQt4 import QtCore, QtGui

sample = """
--[ Begin
this is a test

[ERROR] this test failed.

--[ Command returned exit code 1
"""

class Highlighter(QtGui.QSyntaxHighlighter):
    def __init__(self, parent):
        super(Highlighter, self).__init__(parent)
        self.sectionFormat = QtGui.QTextCharFormat()
        self.sectionFormat.setForeground(QtCore.Qt.blue)
        self.errorFormat = QtGui.QTextCharFormat()
        self.errorFormat.setForeground(QtCore.Qt.red)

    def highlightBlock(self, text):
        # uncomment this line for Python2
        # text = unicode(text)
        if text.startswith('--['):
            self.setFormat(0, len(text), self.sectionFormat)
        elif text.startswith('[ERROR]'):
            self.setFormat(0, len(text), self.errorFormat)

class Window(QtGui.QWidget):
    def __init__(self):
        super(Window, self).__init__()
        self.editor = QtGui.QTextEdit(self)
        self.highlighter = Highlighter(self.editor.document())
        self.editor.setText(sample)
        layout = QtGui.QVBoxLayout(self)
        layout.addWidget(self.editor)

if __name__ == '__main__':

    import sys
    app = QtGui.QApplication(sys.argv)
    window = Window()
    window.setGeometry(500, 150, 300, 300)
    window.show()
    sys.exit(app.exec_())

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