def qwtBackgroundWidget(w):
if w.parentWidget() is None:
return w
if w.autoFillBackground():
brush = w.palette().brush(w.backgroundRole())
if brush.color().alpha() > 0:
return w
if w.testAttribute(Qt.WA_StyledBackground):
image = QImage(1, 1, QImage.Format_ARGB32)
image.fill(Qt.transparent)
painter = QPainter(image)
painter.translate(-w.rect().center())
qwtDrawStyledBackground(w, painter)
painter.end()
if qAlpha(image.pixel(0, 0)) != 0:
return w
return qwtBackgroundWidget(w.parentWidget())
def qwtBackgroundWidget(w):
if w.parentWidget() is None:
return w
if w.autoFillBackground():
brush = w.palette().brush(w.backgroundRole())
if brush.color().alpha() > 0:
return w
if w.testAttribute(Qt.WA_StyledBackground):
image = QImage(1, 1, QImage.Format_ARGB32)
image.fill(Qt.transparent)
painter = QPainter(image)
painter.translate(-w.rect().center())
qwtDrawStyledBackground(w, painter)
painter.end()
if qAlpha(image.pixel(0, 0)) != 0:
return w
return qwtBackgroundWidget(w.parentWidget())
def __init__(self, pos=0., color=None):
self.pos = pos
if color is None:
self.rgb = 0
else:
self.rgb = color.rgba()
self.r = qRed(self.rgb)
self.g = qGreen(self.rgb)
self.b = qBlue(self.rgb)
self.a = qAlpha(self.rgb)
# when mapping a value to rgb we will have to calcualate:
# - const int v = int( ( s1.v0 + ratio * s1.vStep ) + 0.5 );
# Thus adding 0.5 ( for rounding ) can be done in advance
self.r0 = self.r + 0.5
self.g0 = self.g + 0.5
self.b0 = self.b + 0.5
self.a0 = self.a + 0.5
self.rStep = self.gStep = self.bStep = self.aStep = 0.
self.posStep = 0.
def __init__(self, pos=0., color=None):
self.pos = pos
if color is None:
self.rgb = 0
else:
self.rgb = color.rgba()
self.r = qRed(self.rgb)
self.g = qGreen(self.rgb)
self.b = qBlue(self.rgb)
self.a = qAlpha(self.rgb)
# when mapping a value to rgb we will have to calcualate:
# - const int v = int( ( s1.v0 + ratio * s1.vStep ) + 0.5 );
# Thus adding 0.5 ( for rounding ) can be done in advance
self.r0 = self.r + 0.5
self.g0 = self.g + 0.5
self.b0 = self.b + 0.5
self.a0 = self.a + 0.5
self.rStep = self.gStep = self.bStep = self.aStep = 0.
self.posStep = 0.
