Hello,
i would like to add Transparent Layers to FloatCanvas.
For this to achieve at first step i would touch the current classes and
add a Alpha value
for the Color creation. For example something like this:
def SetBrush(self, FillColor, FillStyle, Alpha = 255):
def SetPen(self,LineColor,LineStyle,LineWidth, Alpha = 255):
class RectEllipse(XYObjectMixin, LineAndFillMixin, DrawObject):
def __init__(self, XY, WH,
LineColor = "Black",
LineStyle = "Solid",
LineWidth = 1,
FillColor = None,
FillStyle = "Solid",
InForeground = False,
LineAlpha = 255
FillAlpha = 255):
So the current API stays the same and will not broken.
My question is, to support the alpha drawing we must use the new
GraphicsContext.
Should i use the new GraphicsContext routines directly or can i use the
GCDC Wrapper?
The latter saves some amount of work.
My second question is, should i split the drawing routines in one for
normal drawing
and one for drawing in the hittest bitmap.
An of topic question is, when objects in the drawing overlapps or
objects are completly covered
by other objects. What gives the hittest back? The last drawn object? Or
all objects? I dont see
it by looking on the code. Maybe you can give a short answer.
gruß ralf
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