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/* This code is based on Apple's "GeekGameBoard" sample code, version 1.0.
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http://developer.apple.com/samplecode/GeekGameBoard/
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Copyright © 2007 Apple Inc. Copyright © 2008 Jens Alfke. All Rights Reserved.
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Redistribution and use in source and binary forms, with or without modification, are permitted
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provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this list of conditions
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and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice, this list of
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conditions and the following disclaimer in the documentation and/or other materials provided
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with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
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FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRI-
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BUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#import "BitHolder.h"
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#import "Bit.h"
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#import "QuartzUtils.h"
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#import "GGBUtils.h"
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@implementation BitHolder
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- (void) dealloc
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{
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[_bit release];
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[super dealloc];
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}
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- (Bit*) bit
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{
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if( _bit && _bit.superlayer != self && !_bit.pickedUp )
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setObj(&_bit,nil);
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return _bit;
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}
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- (void) setBit: (Bit*)bit
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{
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if( bit != self.bit ) {
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if( _bit ) {
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if( bit )
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[_bit destroy];
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else
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[_bit removeFromSuperlayer];
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}
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setObj(&_bit,bit);
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ChangeSuperlayer(bit,self,-1);
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}
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}
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- (void) destroyBit
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{
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if( _bit ) {
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[_bit destroy];
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setObj(&_bit,nil);
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}
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}
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- (BOOL) isEmpty {return self.bit==nil;}
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@synthesize highlighted=_highlighted, tag=_tag;
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- (Bit*) canDragBit: (Bit*)bit
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{
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if( bit.superlayer == self && ! bit.unfriendly )
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return bit;
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else
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return nil;
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}
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- (void) cancelDragBit: (Bit*)bit { }
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- (void) draggedBit: (Bit*)bit to: (id<BitHolder>)dst {self.bit = nil;}
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- (BOOL) canDropBit: (Bit*)bit atPoint: (CGPoint)point {return YES;}
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- (void) willNotDropBit: (Bit*)bit { }
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- (BOOL) dropBit: (Bit*)bit atPoint: (CGPoint)point
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{
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self.bit = bit;
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return YES;
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}
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@end
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