1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/Source/BitHolder.m	Mon Mar 10 17:30:57 2008 -0700
     1.3 @@ -0,0 +1,80 @@
     1.4 +/*  This code is based on Apple's "GeekGameBoard" sample code, version 1.0.
     1.5 +    http://developer.apple.com/samplecode/GeekGameBoard/
     1.6 +    Copyright © 2007 Apple Inc. Copyright © 2008 Jens Alfke. All Rights Reserved.
     1.7 +
     1.8 +    Redistribution and use in source and binary forms, with or without modification, are permitted
     1.9 +    provided that the following conditions are met:
    1.10 +
    1.11 +    * Redistributions of source code must retain the above copyright notice, this list of conditions
    1.12 +      and the following disclaimer.
    1.13 +    * Redistributions in binary form must reproduce the above copyright notice, this list of
    1.14 +      conditions and the following disclaimer in the documentation and/or other materials provided
    1.15 +      with the distribution.
    1.16 +
    1.17 +    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
    1.18 +    IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 
    1.19 +    FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRI-
    1.20 +    BUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
    1.21 +    (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
    1.22 +    PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
    1.23 +    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 
    1.24 +    THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
    1.25 +*/
    1.26 +#import "BitHolder.h"
    1.27 +#import "Bit.h"
    1.28 +#import "QuartzUtils.h"
    1.29 +#import "GGBUtils.h"
    1.30 +
    1.31 +
    1.32 +@implementation BitHolder
    1.33 +
    1.34 +
    1.35 +- (void) dealloc
    1.36 +{
    1.37 +    [_bit release];
    1.38 +    [super dealloc];
    1.39 +}
    1.40 +
    1.41 +
    1.42 +- (Bit*) bit
    1.43 +{
    1.44 +    if( _bit && _bit.superlayer != self && !_bit.pickedUp )
    1.45 +        setObj(&_bit,nil);
    1.46 +    return _bit;
    1.47 +}
    1.48 +
    1.49 +- (void) setBit: (Bit*)bit
    1.50 +{
    1.51 +    if( bit != self.bit ) {
    1.52 +        if( bit && _bit )
    1.53 +            [_bit destroy];
    1.54 +        setObj(&_bit,bit);
    1.55 +        ChangeSuperlayer(bit,self,-1);
    1.56 +    }
    1.57 +}
    1.58 +
    1.59 +- (BOOL) isEmpty    {return self.bit==nil;}
    1.60 +
    1.61 +@synthesize highlighted=_highlighted;
    1.62 +
    1.63 +- (Bit*) canDragBit: (Bit*)bit
    1.64 +{
    1.65 +    if( bit.superlayer == self && ! bit.unfriendly )
    1.66 +        return bit;
    1.67 +    else
    1.68 +        return nil;
    1.69 +}
    1.70 +
    1.71 +- (void) cancelDragBit: (Bit*)bit                       { }
    1.72 +- (void) draggedBit: (Bit*)bit to: (id<BitHolder>)dst   {self.bit = nil;}
    1.73 +
    1.74 +- (BOOL) canDropBit: (Bit*)bit atPoint: (CGPoint)point  {return YES;}
    1.75 +- (void) willNotDropBit: (Bit*)bit                      { }
    1.76 +
    1.77 +- (BOOL) dropBit: (Bit*)bit atPoint: (CGPoint)point
    1.78 +{
    1.79 +    self.bit = bit;
    1.80 +    return YES;
    1.81 +}
    1.82 +
    1.83 +@end