更新时间:2023-12-04 09:52:28
做到这一点的一种方法是使用 QTextDocument 来呈现组合框项目的富文本格式(通过自定义代理),并将富文本格式转换为组合框当前文本的纯文本格式(通过其绘制事件)。
这将允许您将html用于项目文本,例如:
self.combo = RichTextCombo(self)
self.combo.addItem(
< span style = background- C olor:蓝色>蓝色/ span>
< span style = background-color:red> Red< / span>
)
这是combobox类:
class RichTextCombo(QtGui.QComboBox):
def __init __(self,* args,** kwargs):
super(RichTextCombo,self).__ init __(* args,** kwargs)
self._document = QtGui.QTextDocument(self)
self._delegate = RichTextDelegate(self)
self。 setItemDelegate(self._delegate)
self.setSizeAdjustPolicy(
QtGui.QComboBox.AdjustToMinimumContentsLength)
def paintEvent(self,event):
painter = QtGui.QStylePainter( self)
painter.setPen(self.palette()。color(QtGui.QPalette.Text))
options = QtGui.QStyleOptionComboBox()
self.initStyleOption(options)
self._document.setHtml(options.currentText)
options.currentText = self._document.toPlainText()
painter.drawComplexControl(QtGui.QStyle.CC_Co mboBox,选项)
painter.drawControl(QtGui.QStyle.CE_ComboBoxLabel,选项)
这是自定义项目委托:
class RichTextDelegate(QtGui.QStyledItemDelegate):
def __init __(self,* args,** kwargs):
super(RichTextDelegate,self).__ init __(* args,** kwargs)
self._document = QtGui.QTextDocument(self)
def paint(自己,画家,选项,索引):
options = QtGui.QStyleOptionViewItemV4(option)
self.initStyleOption(options,index)
如果options.widget为不无:
style = options.widget.style()
else:
style = QtGui.QApplication.style()
self._document.setHtml(options.text)
options.text =''
style.drawControl(QtGui.QStyle.CE_ItemViewItem,options,painter)
context = QtGui.QAbstractTextDocumentLayout.Pain tContext()
如果options.state& QtGui.QStyle.State_Selected:
context.palette.setColor(
QtGui.QPalette.Text,options.palette.color(
QtGui.QPalette.Active,QtGui.QPalette.HighlightedText))
textRect = style.subElementRect(
QtGui.QStyle.SE_ItemViewItemText,选项)
painter.save()
painter.translate(textRect.topLeft())
画家。 setClipRect(textRect.translated(-textRect.topLeft()))
self._document.documentLayout()。draw(painter,context)
painter.restore()
def sizeHint(self,option,index):
options = QtGui.QStyleOptionViewItemV4(option)
self.initStyleOption(options,index)
self._document.setHtml(options.text)
self._document.setTextWidth(options.rect.width())
返回QtCore.QSize(self._document.idealWidth(),
self._document.size()。height())
I'm developing a UI using PyQt where a single item in my Qcombobox can have two or three words separated by commas. So for eg item 1 can be 'Text1, Text2, Text3' and item 2 will be 'Text4, Text5'.
What I want to do is give multiple background colors to the items separated by the ',' in the itemText. So, in case of item 1 ('Text1, Text2, Text3') I would need a color behind Text1, a different one behind Text2 and a third one behind Text3. Similarly, item 2 would have 2 background colors.
I was thinking of using rtf format, but could not figure out a way to give multiple colors to one item row.
Thank you for the help.
One way to do this is to use a QTextDocument to render rich-text for combobox items (via a custom delegate), and also to convert the rich-text back to plain-text for the current text of the combo-box (via its paint event).
This would allow you to use html for the item text, like so:
self.combo = RichTextCombo(self)
self.combo.addItem("""
<span style="background-color: blue">Blue</span>
<span style="background-color: red">Red</span>
""")
Here's the combobox class:
class RichTextCombo(QtGui.QComboBox):
def __init__(self, *args, **kwargs):
super(RichTextCombo, self).__init__(*args, **kwargs)
self._document = QtGui.QTextDocument(self)
self._delegate = RichTextDelegate(self)
self.setItemDelegate(self._delegate)
self.setSizeAdjustPolicy(
QtGui.QComboBox.AdjustToMinimumContentsLength)
def paintEvent(self, event):
painter = QtGui.QStylePainter(self)
painter.setPen(self.palette().color(QtGui.QPalette.Text))
options = QtGui.QStyleOptionComboBox()
self.initStyleOption(options)
self._document.setHtml(options.currentText)
options.currentText = self._document.toPlainText()
painter.drawComplexControl(QtGui.QStyle.CC_ComboBox, options)
painter.drawControl(QtGui.QStyle.CE_ComboBoxLabel, options)
and here's the custom item-delegate:
class RichTextDelegate(QtGui.QStyledItemDelegate):
def __init__(self, *args, **kwargs):
super(RichTextDelegate, self).__init__(*args, **kwargs)
self._document = QtGui.QTextDocument(self)
def paint(self, painter, option, index):
options = QtGui.QStyleOptionViewItemV4(option)
self.initStyleOption(options, index)
if options.widget is not None:
style = options.widget.style()
else:
style = QtGui.QApplication.style()
self._document.setHtml(options.text)
options.text = ''
style.drawControl(QtGui.QStyle.CE_ItemViewItem, options, painter)
context = QtGui.QAbstractTextDocumentLayout.PaintContext()
if options.state & QtGui.QStyle.State_Selected:
context.palette.setColor(
QtGui.QPalette.Text, options.palette.color(
QtGui.QPalette.Active, QtGui.QPalette.HighlightedText))
textRect = style.subElementRect(
QtGui.QStyle.SE_ItemViewItemText, options)
painter.save()
painter.translate(textRect.topLeft())
painter.setClipRect(textRect.translated(-textRect.topLeft()))
self._document.documentLayout().draw(painter, context)
painter.restore()
def sizeHint(self, option, index):
options = QtGui.QStyleOptionViewItemV4(option)
self.initStyleOption(options,index)
self._document.setHtml(options.text)
self._document.setTextWidth(options.rect.width())
return QtCore.QSize(self._document.idealWidth(),
self._document.size().height())