def setCornerRects(self, path):
pos = QPointF(0.0, 0.0)
for i in range(path.elementCount()):
el = path.elementAt(i)
if el.type in (QPainterPath.MoveToElement, QPainterPath.LineToElement):
pos.setX(el.x)
pos.setY(el.y)
elif el.type == QPainterPath.CurveToElement:
r = QRectF(pos, QPointF(el.x, el.y))
self.clipRects += [r.normalized()]
pos.setX(el.x)
pos.setY(el.y)
elif el.type == QPainterPath.CurveToDataElement:
if self.clipRects:
r = self.clipRects[-1]
r.setCoords(
min([r.left(), el.x]),
min([r.top(), el.y]),
max([r.right(), el.x]),
max([r.bottom(), el.y]),
)
self.clipRects[-1] = r.normalized()
def toRect(self):
r = QRectF(
self.hInterval.minValue(),
self.vInterval.minValue(),
self.hInterval.maxValue() - self.hInterval.minValue(),
self.vInterval.maxValue() - self.vInterval.minValue(),
)
r = r.normalized()
if self.hInterval.borderFlags() & QwtInterval.ExcludeMinimum:
r.adjust(1, 0, 0, 0)
if self.hInterval.borderFlags() & QwtInterval.ExcludeMaximum:
r.adjust(0, 0, -1, 0)
if self.vInterval.borderFlags() & QwtInterval.ExcludeMinimum:
r.adjust(0, 1, 0, 0)
if self.vInterval.borderFlags() & QwtInterval.ExcludeMaximum:
r.adjust(0, 0, 0, -1)
return r
def invTransform(self, *args):
"""Transform from paint to scale coordinates
Scalar: scalemap.invTransform(scalar)
Point (QPointF): scalemap.invTransform(xMap, yMap, pos)
Rectangle (QRectF): scalemap.invTransform(xMap, yMap, rect)
"""
if len(args) == 1:
# Scalar transform
return self.invTransform_scalar(args[0])
elif isinstance(args[2], QPointF):
xMap, yMap, pos = args
return QPointF(xMap.invTransform(pos.x()),
yMap.invTransform(pos.y()))
elif isinstance(args[2], QRectF):
xMap, yMap, rect = args
x1 = xMap.invTransform(rect.left())
x2 = xMap.invTransform(rect.right() - 1)
y1 = yMap.invTransform(rect.top())
y2 = yMap.invTransform(rect.bottom() - 1)
r = QRectF(x1, y1, x2 - x1, y2 - y1)
return r.normalized()
