def makeCairoSurface( self ):
if not self._surface:
self._imageRep = sendMsg(
AppKit.NSBitmapImageRep.alloc(),
"initWithBitmapDataPlanes:", None,
"pixelsWide:", self.__maxWidth,
"pixelsHigh:", self.__maxHeight,
"bitsPerSample:", 8,
"samplesPerPixel:", 4,
"hasAlpha:", True,
"isPlanar:", False,
"colorSpaceName:", AppKit.NSCalibratedRGBColorSpace,
"bitmapFormat:", 0,
"bytesPerRow:", 4 * self.__maxWidth,
"bitsPerPixel:", 32
)
# This NSGraphicsContext retains the NSBitmapImageRep we
# pass it, but for some reason it doesn't release it on
# destruction... See this class' __del__() method for how
# we deal with this.
nsContext = sendMsg(
AppKit.NSGraphicsContext,
"graphicsContextWithBitmapImageRep:",
self._imageRep
)
self._surface = cairo_surface_from_NSGraphicsContext(
nsContext,
self.__maxWidth,
self.__maxHeight
)
return self._surface
def drawRect_( self, rect ):
parent = self.__parent()
if not parent:
return
surface = parent._surface
if not surface:
return
# Taken from the OS X Cocoa Drawing Guide section on
# "Creating a Flip Transform".
frameRect = self.bounds()
xform = AppKit.NSAffineTransform.transform()
xform.translateXBy_yBy_(0.0, frameRect.size.height)
xform.scaleXBy_yBy_(1.0, -1.0)
xform.concat()
context = AppKit.NSGraphicsContext.graphicsContextWithBitmapImageRep_(parent._imageRep)
surface = cairo_surface_from_NSGraphicsContext(context, parent.getMaxWidth(), parent.getMaxHeight())
ctx=cairo.Context(surface)
ctx.set_source_surface(parent._surface)
ctx.paint()
surface.finish()
parent._imageRep.draw()
def makeCairoSurface( self ):
if not self._surface:
self._imageRep = sendMsg(
AppKit.NSBitmapImageRep.alloc(),
"initWithBitmapDataPlanes:", None,
"pixelsWide:", self.__maxWidth,
"pixelsHigh:", self.__maxHeight,
"bitsPerSample:", 8,
"samplesPerPixel:", 4,
"hasAlpha:", True,
"isPlanar:", False,
"colorSpaceName:", AppKit.NSCalibratedRGBColorSpace,
"bitmapFormat:", 0,
"bytesPerRow:", 4 * self.__maxWidth,
"bitsPerPixel:", 32
)
# This NSGraphicsContext retains the NSBitmapImageRep we
# pass it, but for some reason it doesn't release it on
# destruction... See this class' __del__() method for how
# we deal with this.
nsContext = sendMsg(
AppKit.NSGraphicsContext,
"graphicsContextWithBitmapImageRep:",
self._imageRep
)
self._surface = cairo_surface_from_NSGraphicsContext(
nsContext,
self.__maxWidth,
self.__maxHeight
)
return self._surface
def drawRect_(self, rect):
parent = self.__parent()
if not parent:
return
surface = parent._surface
if not surface:
return
# Taken from the OS X Cocoa Drawing Guide section on
# "Creating a Flip Transform".
frameRect = self.bounds()
xform = AppKit.NSAffineTransform.transform()
xform.translateXBy_yBy_(0.0, frameRect.size.height)
xform.scaleXBy_yBy_(1.0, -1.0)
xform.concat()
context = AppKit.NSGraphicsContext.graphicsContextWithBitmapImageRep_(
parent._imageRep)
surface = cairo_surface_from_NSGraphicsContext(context,
parent.getMaxWidth(),
parent.getMaxHeight())
ctx = cairo.Context(surface)
ctx.set_source_surface(parent._surface)
ctx.paint()
surface.finish()
parent._imageRep.draw()
