I have a view who's bounding rectangle has been normalize to make
drawing a grid easier. It' bounds is set to ~1x1. Currently I can draw
the grid and what ever curve I want just fine. What I am trying to do
is draw into a NSImage and render it in the view and cache the image so
I can also save the image to disk later. In my test example I am
drawing a curve and to see if the curve renders prior to unlockFocus(i.e
post the last stroke method) I make a call to:
NSRect br = [bp controlPointBounds];
NSLog(@"Path Bounding Box: origin.x:%1.5f origin.y:%1.5f
size.width:%1.5f size.height:%1.5f", br.origin.x, br.origin.y,
br.size.width, br.size.height);
The Output I get is: Path Bounding Box: origin.x:0.00000
origin.y:0.00000 size.width:1.00000 size.height:1.00000. Looks like the
path is drawn just fine.
The documents look pretty straight forward but it looks like I am only
getting a 1x1 view of my data(i.e. the pixel(s) at 0,0) and losing the
scaling factor of the frame. I am assuming the same trick to normalize
a view to 1x1 should also work?? Again, if I just draw to the view and
not to the image, it all draws perfectly.
This is what I am doing.
- (id)initWithFrame:(NSRect)frame {
self = [super initWithFrame:frame];
if (self) {
viewBounds = NSMakeRect(-0.1, -0.1, 1.2, 1.2);
[self setBounds:viewBounds];
}
return self;
}
-(void) setFrameSize:(NSSize)newSize
{
[super setFrameSize:newSize];
[self setBounds:viewBounds];
}
- (void)drawRect:(NSRect)dirtyRect
{
// Set the image size to the bounding rect
NSImage* anImage = [[NSImage alloc] initWithSize:viewBounds];
[anImage lockFocus];
// Draw a bunch of stuff
// Unlock and draw the image
[anImage unlockFocus];
[anImage drawAtPoint:NSMakePoint(0, 0)
fromRect: NSZeroRect
operation: NSCompositeSourceOver
fraction: 1.0];
[anImage release]; // for now.
}
Thanks people,
-Tony
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