class RichTextColumnDelegate(QStyledItemDelegate):
"""enables rich text in a view"""
label = None
document = None
def __init__(self, parent=None):
super(RichTextColumnDelegate, self).__init__(parent)
if self.label is None:
self.label = QLabel()
self.label.setIndent(5)
self.label.setTextFormat(Qt.RichText)
self.document = QTextDocument()
def paint(self, painter, option, index):
"""paint richtext"""
if option.state & QStyle.State_Selected:
role = QPalette.Highlight
else:
role = QPalette.AlternateBase if index.row() % 2 else QPalette.Base
self.label.setBackgroundRole(role)
text = index.model().data(index, Qt.DisplayRole)
self.label.setText(text)
self.label.setFixedSize(option.rect.size())
with Painter(painter):
painter.translate(option.rect.topLeft())
self.label.render(painter)
def sizeHint(self, option, index):
"""compute size for the final formatted richtext"""
text = index.model().data(index)
self.document.setDefaultFont(option.font)
self.document.setHtml(text)
return QSize(self.document.idealWidth() + 5,
option.fontMetrics.height())
