def __init__(self, parent):
QPushButton.__init__(self, parent)
self._cancelled = False
self._originalColor = None
self._color = QColor('black')
self._colorPickerWidget = ColorPickerWidget(self)
self._colorPickerWidget.setWindowFlags(Qt.Popup)
self._colorPickerWidget.hide()
self._colorPickerWidget.installEventFilter(self)
self._colorPickerWidget.resize(80, 80)
self.refresh()
self._colorPickerWidget.colorChanged.connect(self.refresh)
self.clicked.connect(self.togglePopup)
def paintEvent(self, event):
painter = QPainter()
painter.begin(self)
painter.setPen(Qt.black)
# create the hue rect
hrect = self.hueRect()
# create the hue gradient
grad = QLinearGradient()
grad.setStart(0, hrect.top())
grad.setFinalStop(0, hrect.bottom())
for i in range(10):
perc = i / 10.0
grad.setColorAt(perc, QColor.fromHsv(perc * 360, 255, 255))
grad.setColorAt(1.0, QColor.fromHsv(359, 255, 255))
painter.setBrush(grad)
painter.drawRect(hrect)
# create the hue line
y = (hrect.y() + 2) + self.huePercent() * (hrect.height() - 3)
pen = painter.pen()
pen.setColor(Qt.white)
pen.setWidth(2)
painter.setPen(pen)
painter.drawLine(hrect.left() + 2, y, hrect.right(), y)
painter.setPen(Qt.black)
# create the alpha rect
if (self.showAlpha()):
arect = self.alphaRect()
# create the alpha gradient
grad = QLinearGradient()
grad.setStart(arect.left(), 0)
grad.setFinalStop(arect.right(), 0)
grad.setColorAt(0.0, QColor(Qt.black))
grad.setColorAt(1.0, QColor(Qt.white))
painter.setBrush(grad)
painter.drawRect(arect)
# create the alpha line
x = (arect.x() +
2) + (1 - self.alphaPercent()) * (arect.width() - 3)
pen = painter.pen()
pen.setColor(Qt.yellow)
pen.setWidth(2)
painter.setPen(pen)
painter.drawLine(x, arect.top() + 2, x, arect.bottom())
painter.setPen(Qt.black)
crect = self.colorRect()
# create the color scale gradient
grad = QLinearGradient()
grad.setStart(crect.left(), 0)
grad.setFinalStop(crect.right(), 0)
grad.setColorAt(0.0, QColor(255, 255, 255, self.alpha()))
grad.setColorAt(1.0, QColor.fromHsv(self.hue(), 255, 255,
self.alpha()))
painter.setBrush(grad)
painter.drawRect(crect)
# create the grayscale gradient
grad = QLinearGradient()
grad.setStart(0, crect.top())
grad.setFinalStop(0, crect.bottom())
grad.setColorAt(0.0, QColor(0, 0, 0, 0))
grad.setColorAt(1.0, QColor(0, 0, 0, self.alpha()))
painter.setBrush(grad)
painter.drawRect(crect)
# create the color location
x = crect.x() + (self.saturation() / 255.0) * crect.width()
y = crect.y() + (1 - (self.lightness() / 255.0)) * crect.height()
painter.setPen(Qt.white)
painter.setBrush(
QColor.fromHsv(self.hue(), self.saturation(), self.lightness(),
50))
painter.setClipRect(crect)
painter.setRenderHint(QPainter.Antialiasing)
painter.drawEllipse(QPoint(x, y), 5, 5)
painter.end()
