使用PySide / PyQT,我需要在QLineEdit中输入的文本中添加一些语法突出显示。我需要突出显示特定的关键字。
我在下面的文章中看到了一个示例,该示例说明了如何在C ++中执行此操作,但我正在尝试在Python中执行此操作。 (尝试将C ++转换为Python,但无法获取...)有人对如何在Python中执行此操作有建议吗?谢谢。
How can I change color of part of the text in QLineEdit?
更多信息:
当前,我正在如下更改整个QLineEdit的颜色:
for dupLineEd in duplicates[1]:
dupLineEd.setStyleSheet("QLineEdit{color:Khaki}")
这不是理想的。我需要做的是确定QLineEdit中的某些单词是否满足条件(在这种情况下,它们是否与另一个QLineEdit中的单词重复),如果是,则仅用颜色突出显示QLineEdit中的单词,而不是整个QLineEdit。该突出显示需要在用户键入时实时完成,以便例如在他们完成一个单词时,如果该单词符合条件,则该单词会变成黄色。 QLineEdit中的其余文本不会更改颜色。
在此先感谢任何有建议的人!
答案 0 :(得分:0)
到目前为止,我能找到的最好的解决方法是制作一个新的QTextEdit类,其行为(部分)类似于QLineEdit。
现在我要借用由igor-bogomolov编写的QligEdit的Highligter类,该类发布在github上: https://github.com/pyside/Examples/blob/master/examples/richtext/syntaxhighlighter/syntaxhighlighter.py
我得到的功能代码如下。 (您需要根据您的环境定义main_window。)
class qTextEditTestUI(QtGui.QDialog):
def __init__(self, parent=QtGui.QWidget):
# Inherit __init__
super(qTextEditTestUI, self).__init__(parent)
# Set object name and window title
self.setObjectName('qTextEditTestWindow')
self.setWindowTitle('qTextEdit Test Window')
# Window type (Qt.tool not Qt.Window)
self.setWindowFlags(QtCore.Qt.Tool)
# ATTRS
self.highlighter = Highlighter()
# CREATE WIDGETS
variableFormat = QtGui.QTextCharFormat()
#variableFormat.setFontWeight(QtGui.QFont.Bold)
variableFormat.setForeground(QtGui.QColor('Khaki'))
self.highlighter.addMapping('hello', variableFormat)
# Make a TextEdit
self.QTextEd = snglLnQTextEdit()
# Add the TextEdit's document to the highlighter
self.highlighter.addToDocument(self.QTextEd.document())
# SET MASTER LAYOUT
masterLayout = QtGui.QVBoxLayout()
self.setLayout(masterLayout)
# MASTER LAYOUT
masterLayout.addWidget(self.QTextEd)
masterLayout.addStretch()
## QLineEdit-Like QTextEdit
class snglLnQTextEdit(QtGui.QTextEdit):
def __init__(self, parent=None):
QtGui.QTextEdit.__init__(self, parent)
QTextEdFontMetrics = QtGui.QFontMetrics(self.font())
self.QTextEdRowHeight = QTextEdFontMetrics.lineSpacing()
self.setFixedHeight(2 * self.QTextEdRowHeight)
self.setLineWrapMode(QtGui.QTextEdit.NoWrap)
self.setVerticalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
self.setHorizontalScrollBarPolicy(QtCore.Qt.ScrollBarAlwaysOff)
# CONNECT WIDGET SIGNAL
self.textChanged.connect(self.validateCharacters)
def validateCharacters(self):
badChars = ['\n']
cursor = self.textCursor()
curPos = cursor.position()
for badChar in badChars:
origText = self.toPlainText()
for char in origText:
if char in badChars:
cleanText = origText.replace(char, '')
self.blockSignals(True)
self.setText(cleanText)
self.blockSignals(False)
cursor.setPosition(curPos-1)
self.setTextCursor(cursor)
## Highligher Class written by igor-bogomolov
class Highlighter(QtCore.QObject):
def __init__(self, parent=None):
QtCore.QObject.__init__(self, parent)
self.mappings = {}
def addToDocument(self, doc):
self.connect(doc, QtCore.SIGNAL('contentsChange(int, int, int)'), self.highlight)
def addMapping(self, pattern, format):
self.mappings[pattern] = format
def highlight(self, position, removed, added):
doc = self.sender()
block = doc.findBlock(position)
if not block.isValid():
return
if added > removed:
endBlock = doc.findBlock(position + added)
else:
endBlock = block
while block.isValid() and not (endBlock < block):
self.highlightBlock(block)
block = block.next()
def highlightBlock(self, block):
layout = block.layout()
text = block.text()
overrides = []
for pattern in self.mappings:
for m in re.finditer(pattern,text):
range = QtGui.QTextLayout.FormatRange()
s,e = m.span()
range.start = s
range.length = e-s
range.format = self.mappings[pattern]
overrides.append(range)
layout.setAdditionalFormats(overrides)
block.document().markContentsDirty(block.position(), block.length())
## Test Usage:
panl = qTextEditTestUI(parent=main_window())
panl.show()
这可以完成工作,但是我对此并不完全满意;感觉笨拙。我仍然希望弄清楚如何使用QLineEdit进行这种突出显示。