class RichText_QStyledItemDelegate(QStyledItemDelegate):
"""
Defines a `QStyledItemDelegate <http://doc.qt.nokia.com/qstyleditemdelegate.html>`_ subclass used as a rich
text Delegate for Application Views.
"""
def __init__(self,
parent=None,
style=None,
highlightColor=None,
hoverColor=None,
backgroundColor=None,
highlightBackgroundColor=None,
hoverBackgroundColor=None):
"""
Initializes the class.
:param parent: Widget parent.
:type parent: QObject
:param style: Style.
:type style: Style
"""
LOGGER.debug("> Initializing '{0}()' class.".format(self.__class__.__name__))
QStyledItemDelegate.__init__(self, parent)
# --- Setting class attributes. ---
self.__indent = 5
self.__label = QLabel()
self.__label.setIndent(self.__indent)
self.__label.setTextFormat(Qt.RichText)
self.__defaultStyle = Style(default=\
"""
QLabel, QLabel link {
background-color: rgb(32, 32, 32);
color: rgb(192, 192, 192);
}
""",
hover=\
"""
QLabel, QLabel link {
background-color: rgb(64, 64, 64);
color: rgb(192, 192, 192);
}
""",
highlight=\
"""
QLabel, QLabel link {
background-color: rgb(128, 128, 128);
color: rgb(224, 224, 224);
}
""")
self.__style = self.__defaultStyle
self.style = style or self.__style
#******************************************************************************************************************
#*** Attributes properties.
#******************************************************************************************************************
@property
def style(self):
"""
Property for **self.__style** attribute.
:return: self.__style.
:rtype: Style
"""
return self.__style
@style.setter
@foundations.exceptions.handleExceptions(AssertionError)
def style(self, value):
"""
Setter for **self.__style** attribute.
:param value: Attribute value.
:type value: Style
"""
if value is not None:
assert type(value) is Style, "'{0}' attribute: '{1}' type is not 'Style'!".format("style", value)
style = Style()
for item in(self.__defaultStyle, value):
style.update(item)
value = style
self.__style = value
@style.deleter
@foundations.exceptions.handleExceptions(foundations.exceptions.ProgrammingError)
def style(self):
"""
Deleter for **self.__style** attribute.
"""
raise foundations.exceptions.ProgrammingError(
"{0} | '{1}' attribute is not deletable!".format(self.__class__.__name__, "style"))
#******************************************************************************************************************
#*** Class methods.
#******************************************************************************************************************
def paint(self, painter, option, index):
"""
Reimplements the :meth:`QStyledItemDelegate.paint` method.
"""
if option.state & QStyle.State_MouseOver:
styleSheet = self.__style.hover
elif option.state & QStyle.State_Selected:
styleSheet = self.__style.highlight
else:
styleSheet = self.__style.default
self.__label.setStyleSheet(styleSheet)
data = index.model().data(index, Qt.DisplayRole)
self.__label.setText(umbra.ui.common.getQVariantAsString(data))
self.__label.setFixedSize(option.rect.size())
painter.save()
painter.translate(option.rect.topLeft())
self.__label.render(painter)
painter.restore()
def sizeHint(self, option, index):
"""
Reimplements the :meth:`QStyledItemDelegate.sizeHint` method.
"""
document = QTextDocument()
document.setDefaultFont(option.font)
data = index.model().data(index)
text = umbra.ui.common.getQVariantAsString(data)
self.__label.setText(text)
document.setHtml(text)
return QSize(document.idealWidth() + self.__indent, option.fontMetrics.height())
