Well, do you actually erase them?
The drawRect: method usually starts with something that paints the
background colour - if you don't do that then any pixels previously
drawn are not cleared.
e.g.:
- (void) drawRect:(NSRect) rect
{
[[NSColor whiteColor] set];
NSRectFill( rect );
// the rest of the drawing code...
}
hth,
Graham
On 23 Jul 2008, at 8:03 am, JArod Wen wrote:
Hi,
I met a problem on clearing points and paths on a customized NSView.
I set four NSBezierPath for drawing: pathForPositionMeasure,
pathForDistanceMeasure, pathForAngleMeasure and selectedPath, and
used the following code for clearing:
[pathForPositionMeasure removeAllPoints];
[pathForDistanceMeasure removeAllPoints];
[pathForAngleMeasure removeAllPoints];
[selectedPath removeAllPoints];
[self setNeedsDisplay:YES];
And the drawRect is only contained the code to draw these four
paths. But after these lines are executed, points and paths are
still there on the view. Is there any way to clear them?
Thanks in advance!
---------------
JArod Wen
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