def drawHandle(self, painter, handle):
opt = QStyleOptionSlider()
self._initStyleOption(opt, handle)
opt.subControls = QStyle.SC_SliderHandle
pressed = self.upperPressed
if handle == QxtSpanSlider.LowerHandle:
pressed = self.lowerPressed
if pressed == QStyle.SC_SliderHandle:
opt.activeSubControls = pressed
opt.state |= QStyle.State_Sunken
painter.drawComplexControl(QStyle.CC_Slider, opt)
def drawSpan(self, painter, rect):
opt = QStyleOptionSlider()
QSlider.initStyleOption(self, opt)
# area
groove = self.style().subControlRect(QStyle.CC_Slider, opt,
QStyle.SC_SliderGroove, self)
if opt.orientation == QtCore.Qt.Horizontal:
groove.adjust(0, 0, -1, 0)
else:
groove.adjust(0, 0, 0, -1)
# pen & brush
painter.setPen(QPen(self.gradientLeftColor, 0))
if opt.orientation == QtCore.Qt.Horizontal:
self.setupPainter(painter, opt.orientation,
groove.center().x(), groove.top(),
groove.center().x(), groove.bottom())
else:
self.setupPainter(painter, opt.orientation, groove.left(),
groove.center().y(), groove.right(),
groove.center().y())
# draw groove
intersected = QtCore.QRectF(rect.intersected(groove))
gradient = QLinearGradient(intersected.topLeft(),
intersected.topRight())
gradient.setColorAt(0, self.gradientLeft)
gradient.setColorAt(1, self.gradientRight)
painter.fillRect(intersected, gradient)
def handleMousePress(self, pos, control, value, handle):
opt = QStyleOptionSlider()
self._initStyleOption(opt, handle)
oldControl = control
control = self.style().hitTestComplexControl(QStyle.CC_Slider, opt, pos, self)
sr = self.style().subControlRect(QStyle.CC_Slider, opt, QStyle.SC_SliderHandle, self)
if control == QStyle.SC_SliderHandle:
self.position = value
self.offset = self.pick(pos - sr.topLeft())
self.lastPressed = handle
self.setSliderDown(True)
self.sliderPressed.emit(handle)
if control != oldControl:
self.update(sr)
return control
def mouseMoveEvent(self, event):
if self.lowerPressed != QStyle.SC_SliderHandle and self.upperPressed != QStyle.SC_SliderHandle:
event.ignore()
return
opt = QStyleOptionSlider()
self.initStyleOption(opt)
m = self.style().pixelMetric(QStyle.PM_MaximumDragDistance, opt, self)
newPosition = self.pixelPosToRangeValue(
self.pick(event.pos()) - self.offset)
if m >= 0:
r = self.rect().adjusted(-m, -m, m, m)
if not r.contains(event.pos()):
newPosition = self.position
# pick the preferred handle on the first movement
if self.firstMovement:
if self.lower == self.upper:
if newPosition < self.lowerValue:
self.swapControls()
self.firstMovement = False
else:
self.firstMovement = False
if self.lowerPressed == QStyle.SC_SliderHandle:
if self.movement == QxtSpanSlider.NoCrossing:
newPosition = min(newPosition, self.upper)
elif self.movement == QxtSpanSlider.NoOverlapping:
newPosition = min(newPosition, self.upper - 1)
if self.movement == QxtSpanSlider.FreeMovement and newPosition > self.upper:
self.swapControls()
self.setUpperPosition(newPosition)
else:
self.setLowerPosition(newPosition)
elif self.upperPressed == QStyle.SC_SliderHandle:
if self.movement == QxtSpanSlider.NoCrossing:
newPosition = max(newPosition, self.lowerValue)
elif self.movement == QxtSpanSlider.NoOverlapping:
newPosition = max(newPosition, self.lowerValue + 1)
if self.movement == QxtSpanSlider.FreeMovement and newPosition < self.lower:
self.swapControls()
self.setLowerPosition(newPosition)
else:
self.setUpperPosition(newPosition)
event.accept()
def paintEvent(self, event):
painter = QStylePainter(self)
# ticks
opt = QStyleOptionSlider()
self.initStyleOption(opt)
opt.subControls = QStyle.SC_SliderTickmarks
painter.drawComplexControl(QStyle.CC_Slider, opt)
# groove
opt.sliderPosition = 20
opt.sliderValue = 0
opt.subControls = QStyle.SC_SliderGroove
painter.drawComplexControl(QStyle.CC_Slider, opt)
# handle rects
opt.sliderPosition = self.lowerPos
lr = self.style().subControlRect(QStyle.CC_Slider, opt,
QStyle.SC_SliderHandle, self)
lrv = self.pick(lr.center())
opt.sliderPosition = self.upperPos
ur = self.style().subControlRect(QStyle.CC_Slider, opt,
QStyle.SC_SliderHandle, self)
urv = self.pick(ur.center())
# span
minv = min(lrv, urv)
maxv = max(lrv, urv)
c = self.style().subControlRect(QStyle.CC_Slider, opt,
QStyle.SC_SliderGroove, self).center()
spanRect = QRect(QPoint(c.x() - 2, minv), QPoint(c.x() + 1, maxv))
if self.orientation() == QtCore.Qt.Horizontal:
spanRect = QRect(QPoint(minv, c.y() - 2), QPoint(maxv, c.y() + 1))
self.drawSpan(painter, spanRect)
# handles
if self.lastPressed == QxtSpanSlider.LowerHandle:
self.drawHandle(painter, QxtSpanSlider.UpperHandle)
self.drawHandle(painter, QxtSpanSlider.LowerHandle)
else:
self.drawHandle(painter, QxtSpanSlider.LowerHandle)
self.drawHandle(painter, QxtSpanSlider.UpperHandle)
def pixelPosToRangeValue(self, pos):
opt = QStyleOptionSlider()
self.initStyleOption(opt)
sliderMin = 0
sliderMax = 0
sliderLength = 0
gr = self.style().subControlRect(QStyle.CC_Slider, opt, QStyle.SC_SliderGroove, self)
sr = self.style().subControlRect(QStyle.CC_Slider, opt, QStyle.SC_SliderHandle, self)
if self.orientation() == QtCore.Qt.Horizontal:
sliderLength = sr.width()
sliderMin = gr.x()
sliderMax = gr.right() - sliderLength + 1
else:
sliderLength = sr.height()
sliderMin = gr.y()
sliderMax = gr.bottom() - sliderLength + 1
return QStyle.sliderValueFromPosition(self.minimum(), self.maximum(), pos - sliderMin, sliderMax - sliderMin, opt.upsideDown)