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Sample Programs from NeXSTEP 3.3

#import "SpotView.h"
#import "Spot.h"
#import "Thinker.h"

@implementation SpotView

- (BOOL) acceptsFirstMouse
{	return YES;
}

- initFrame:(const NXRect *)r
{
	[super initFrame:r];
	[self allocateGState];		// For faster lock/unlockFocus
	return self;
}

- lateInit
{
	server = [myThinker server];
	return self;
}

- mouseDown:(NXEvent *)theEvent
{
    NXPoint mouseLocation, offset;
	id spotToMove = nil;
	int	looping = YES, oldMask;

	oldMask = [window addToEventMask:NX_MOUSEDRAGGEDMASK];
	do {
		mouseLocation = theEvent->location;
		[self convertPoint:&mouseLocation fromView:nil];
		
		switch (theEvent->type)
		{
			case NX_MOUSEDOWN:
				spotToMove = [server getSpotForPoint:mouseLocation
								spotLocation:&offset];
				if (!spotToMove)
				{
					looping = NO;
					break;
				}
				offset.x = mouseLocation.x - offset.x;
				offset.y = mouseLocation.y - offset.y;
				break;

			case NX_MOUSEUP:
				looping = NO;
				// now fall into mousedragged implementation

			case NX_MOUSEDRAGGED:
				mouseLocation.x -= offset.x;
				mouseLocation.y -= offset.y;
				if (![spotToMove setLocation:mouseLocation])
				{
					looping = NO;
					spotToMove = nil;
				}
				break;
		}
		
   	} while (looping && (theEvent = [NXApp getNextEvent:
			NX_MOUSEUPMASK|NX_MOUSEDRAGGEDMASK]));

	[window setEventMask:oldMask];

	[spotToMove unlock];
	// if (![myThinker isServer])
	if ([spotToMove isProxy])
	{
		// this actually frees the local proxy but may or may not
		// free the ref-counted spot on the server side

		[spotToMove free];
	}

    return self;
}

- drawSelf:(const NXRect *) rects :(int)rectCount
{
	int	i, n;
	id aSpot;
	NXPoint pnt;

	PSsetgray(NX_WHITE);
	NXRectFill(&bounds);

	// the list is retrieved bycopy so it is local, as are
	// all the objects in the list

	spotList = [myThinker spotList];
	
	n = [spotList count];
	
	for (i = 0; i < n; i++)
	{
		aSpot = [spotList objectAt:i];
		NXSetColor([aSpot color]);
		pnt = [aSpot location];
		PSarc(pnt.x+15, pnt.y+15, 15, 0, 360);
		PSfill();
	}
	return self;
}


@end

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