I implemented this code into a very simple application, but still can’t get any results. “vue” is my NSView where I want the path to be drawn. That piece of code doesn’t deliver any result. Can anyone give me a clue ?

• (void)drawRect:(NSRect)rect { rect = [vue bounds];

  NSBezierPath *chemin; NSPoint p1 = NSMakePoint([lignex1 intValue], [ligney1 intValue]); NSPoint p2 = NSMakePoint([lignex2 intValue], [ligney2 intValue]);

  [chemin moveToPoint:p1]; [chemin lineToPoint:p2];

  NSColor *couleur = [NSColor colorWithCalibratedRed:([rouge intValue]/255.0) green:([vert intValue]/255.0) blue:([bleu intValue]/255.0) alpha:([alpha intValue]/255.0)];

  [couleur set]; [chemin stroke];

}

I also want to make the NSView draw itself ONLY when the user presses a button.

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• (void)drawRect:(NSRect)rect { rect = [self bounds]; // <– You are implementing this in a sublass of NSView, right?

  NSBezierPath *chemin = [NSBezierPath bezierPath]; // Instantiate object “chemin” (autoreleased)

For the button thingie, see -setNeedsDisplay: in NSView.

– PerSquare

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Okay, I think I was not precise enough. I want a button to draw a line, another one to draw a rectangle, and another one to draw a circle. How do I implement the drawRect: method to make a different drawing for each button ?

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Hmm, you really don’t do that in drawRect: in general. I suggest you:

• Subclass NSView (necessary)
• Add an instance variable NSBezierPath *shape; to it
• Add a method setShape:(NSBezierPath ‘)theShape;
• Do a [myView setShape:someShape] in your different button actions and
• issue [myView setNeedsDisplay:YES] after a shape is changed

Read up om ModelViewController and check out the examples (on your HD)

• /Developer/Examples/AppKit/DotView
• /Developer/Examples/AppKit/BezierPathLab

in that order.

Good luck, PerSquare