GeekGameBoard: Source/BitHolder.m@28392c9a969f

     1 /*  This code is based on Apple's "GeekGameBoard" sample code, version 1.0.

     2     http://developer.apple.com/samplecode/GeekGameBoard/

     3     Copyright © 2007 Apple Inc. Copyright © 2008 Jens Alfke. All Rights Reserved.

     5     Redistribution and use in source and binary forms, with or without modification, are permitted

     6     provided that the following conditions are met:

     8     * Redistributions of source code must retain the above copyright notice, this list of conditions

     9       and the following disclaimer.

    10     * Redistributions in binary form must reproduce the above copyright notice, this list of

    11       conditions and the following disclaimer in the documentation and/or other materials provided

    12       with the distribution.

    14     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR

    15     IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND

    16     FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRI-

    17     BUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

    18     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

    19     PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

    20     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF

    21     THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    22 */

    23 #import "BitHolder.h"

    24 #import "Bit.h"

    25 #import "QuartzUtils.h"

    26 #import "GGBUtils.h"

    29 @implementation BitHolder

    32 - (void) dealloc

    33 {

    34     [_bit release];

    35     [super dealloc];

    36 }

    39 - (Bit*) bit

    40 {

    41     if( _bit && _bit.superlayer != self && !_bit.pickedUp )

    42         setObj(&_bit,nil);

    43     return _bit;

    44 }

    46 - (void) setBit: (Bit*)bit

    47 {

    48     if( bit != self.bit ) {

    49         if( _bit ) {

    50             if( bit )

    51                 [_bit destroy];

    52             else

    53                 [_bit removeFromSuperlayer];

    54         }

    55         setObj(&_bit,bit);

    56         ChangeSuperlayer(bit,self,-1);

    57     }

    58 }

    60 - (void) destroyBit

    61 {

    62     if( _bit ) {

    63         [_bit destroy];

    64         setObj(&_bit,nil);

    65     }

    66 }

    68 - (BOOL) isEmpty    {return self.bit==nil;}

    70 @synthesize highlighted=_highlighted, tag=_tag;

    72 - (Bit*) canDragBit: (Bit*)bit

    73 {

    74     if( bit.superlayer == self && ! bit.unfriendly )

    75         return bit;

    76     else

    77         return nil;

    78 }

    80 - (void) cancelDragBit: (Bit*)bit                       { }

    81 - (void) draggedBit: (Bit*)bit to: (id<BitHolder>)dst   {self.bit = nil;}

    83 - (BOOL) canDropBit: (Bit*)bit atPoint: (CGPoint)point  {return YES;}

    84 - (void) willNotDropBit: (Bit*)bit                      { }

    86 - (BOOL) dropBit: (Bit*)bit atPoint: (CGPoint)point

    87 {

    88     self.bit = bit;

    89     return YES;

    90 }

    92 @end

author	Jens Alfke <jens@mooseyard.com>
	Mon Jul 14 21:00:15 2008 -0700 (2008-07-14)
changeset 16	28392c9a969f
parent 15	73f8c889f053
permissions	-rw-r--r--