def create_rubber_band(self):
"""
Creates a new instance of the selection rubber band
:return: QRubberBand
"""
rubber_band = QRubberBand(QRubberBand.Rectangle, self)
palette = QPalette()
color = self.rubber_band_color()
palette.setBrush(QPalette.Highlight, QBrush(color))
rubber_band.setPalette(palette)
return rubber_band
class StrackColorScheme(object):
"""Class to ease custom colors of PyQt apps
baseColor: This is the main background color.
highlightColor: Typically contrasting the baseColor (e.g. used to highlight current focus)
spread: Float value indicating the brightness range generated by generateColors (1.5-2.0 seems most reasonable)
"""
def __init__(self,
baseColor=QColor("#f7f7f7"),
highlightColor=QColor("#2196F3"),
spread=2.5):
"""Constructor
By default a nukeish color scheme (dark slate + orange highlight) is created
This can be overriden by either supplying colors or by loading a different
scheme from disc via the load settings
"""
self.palette = QPalette()
self.baseColor = baseColor
self.highlightColor = highlightColor
self.spread = spread
self.generateScheme()
QApplication.setStyle("Plastique")
def __lightness(self, color):
"""Returns simple averaged lightness of a QColor
Newer Qt Versions implement this as part of QColor
Reimplemented for backwards-compatibility
"""
hsv = color.toHsv()
return hsv.valueF()
def generateScheme(self, apply=True):
"""Generate color palette
By default the generated palette is also applied to the whole application
To override supply the apply=False argument
"""
BASE_COLOR = self.baseColor
HIGHLIGHT_COLOR = self.highlightColor
BRIGHTNESS_SPREAD = self.spread
if self.__lightness(BASE_COLOR) > 0.5:
SPREAD = 100 / BRIGHTNESS_SPREAD
else:
SPREAD = 100 * BRIGHTNESS_SPREAD
if self.__lightness(HIGHLIGHT_COLOR) > 0.6:
HIGHLIGHTEDTEXT_COLOR = BASE_COLOR.darker(SPREAD * 2)
else:
HIGHLIGHTEDTEXT_COLOR = BASE_COLOR.lighter(SPREAD * 2)
self.palette.setBrush(QPalette.Window, QBrush(BASE_COLOR))
self.palette.setBrush(QPalette.WindowText,
QBrush(BASE_COLOR.lighter(SPREAD * 2)))
self.palette.setBrush(QPalette.Foreground,
QBrush(BASE_COLOR.lighter(SPREAD)))
self.palette.setBrush(QPalette.Base, QBrush(BASE_COLOR))
self.palette.setBrush(QPalette.AlternateBase,
QBrush(BASE_COLOR.darker(SPREAD)))
self.palette.setBrush(QPalette.ToolTipBase, QBrush(BASE_COLOR))
self.palette.setBrush(QPalette.ToolTipText,
QBrush(BASE_COLOR.lighter(SPREAD)))
self.palette.setBrush(QPalette.Text,
QBrush(BASE_COLOR.lighter(SPREAD * 1.8)))
self.palette.setBrush(QPalette.Button, QBrush(BASE_COLOR))
self.palette.setBrush(QPalette.ButtonText,
QBrush(BASE_COLOR.lighter(SPREAD * 1.2)))
self.palette.setBrush(QPalette.BrightText, QBrush(QColor("#ffffff")))
self.palette.setBrush(QPalette.Light,
QBrush(BASE_COLOR.lighter(SPREAD)))
self.palette.setBrush(QPalette.Midlight,
QBrush(BASE_COLOR.lighter(SPREAD / 2)))
self.palette.setBrush(QPalette.Dark, QBrush(BASE_COLOR.darker(SPREAD)))
self.palette.setBrush(QPalette.Mid, QBrush(BASE_COLOR))
self.palette.setBrush(QPalette.Shadow,
QBrush(BASE_COLOR.darker(SPREAD * 2)))
self.palette.setBrush(QPalette.Highlight, QBrush(HIGHLIGHT_COLOR))
self.palette.setBrush(QPalette.HighlightedText,
QBrush(HIGHLIGHTEDTEXT_COLOR))
if apply:
QApplication.setPalette(self.palette)
def applyStyle(self, target=QApplication):
"""Apply the color scheme in self.palette
When called without arguments the whole application will be styled
If a widget is supplied as argument only this widget will be styled
"""
target.setPalette(self.palette)
def colorFromStringTuple(self, tuple):
return QColor(int(tuple[0]), int(tuple[1]), int(tuple[2]))
def loadSimpleScheme(self, file, apply=True):
scheme = ConfigParser.ConfigParser()
scheme.read(file)
self.baseColor = self.colorFromStringTuple(
scheme.get("AutoColors", "baseColor").split(","))
self.highlightColor = self.colorFromStringTuple(
scheme.get("AutoColors", "highlightColor").split(","))
self.spread = float(scheme.get("AutoColors", "spread"))
if apply:
self.generateScheme()
else:
self.generateScheme(apply=False)
def loadScheme(self, file):
"""TODO: Implement
"""
raise NotImplementedError