class HighlightLineMode(Mode):
"""
This mode highlights the current line.
Line color is defined by :attr:`pcef.style.Style.activeLineColor`
"""
#: Mode identifier
IDENTIFIER = "Highlight line"
#: Mode description
DESCRIPTION = "Highlight the current line in the editor"
def __init__(self):
super(HighlightLineMode, self).__init__(
self.IDENTIFIER, self.DESCRIPTION)
self.__pos = -1
self.__decoration = None
self.__brush = None
def _onStateChanged(self, state):
""" Connects/Disconnects to/from CodeEdit signals """
if state is True:
self.editor.codeEdit.cursorPositionChanged.connect(self.changeActiveLine)
self.changeActiveLine()
else:
self.editor.codeEdit.cursorPositionChanged.disconnect(self.changeActiveLine)
self.editor.codeEdit.removeDecoration(self.__decoration)
def _onStyleChanged(self):
""" Updates the pygments style """
self.__brush = QBrush(QColor(self.currentStyle.activeLineColor))
self.__pos = -1
self.changeActiveLine()
@Slot()
def changeActiveLine(self):
""" Updates the active line decoration """
tc = self.editor.codeEdit.textCursor()
pos = tc.blockNumber()
if pos != self.__pos:
self.__pos = pos
# remove previous selection
self.editor.codeEdit.removeDecoration(self.__decoration)
# add new selection
self.__decoration = TextDecoration(tc)
self.__decoration.setBackground(self.__brush)
self.__decoration.setFullWidth()
self.editor.codeEdit.addDecoration(self.__decoration)
