jens@0: /*  This code is based on Apple's "GeekGameBoard" sample code, version 1.0.
jens@0:     http://developer.apple.com/samplecode/GeekGameBoard/
jens@0:     Copyright © 2007 Apple Inc. Copyright © 2008 Jens Alfke. All Rights Reserved.
jens@0: 
jens@0:     Redistribution and use in source and binary forms, with or without modification, are permitted
jens@0:     provided that the following conditions are met:
jens@0: 
jens@0:     * Redistributions of source code must retain the above copyright notice, this list of conditions
jens@0:       and the following disclaimer.
jens@0:     * Redistributions in binary form must reproduce the above copyright notice, this list of
jens@0:       conditions and the following disclaimer in the documentation and/or other materials provided
jens@0:       with the distribution.
jens@0: 
jens@0:     THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR
jens@0:     IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND 
jens@0:     FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRI-
jens@0:     BUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
jens@0:     (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
jens@0:     PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
jens@0:     CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 
jens@0:     THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
jens@0: */
jens@0: #import "Stack.h"
jens@0: #import "QuartzUtils.h"
jens@0: 
jens@0: 
jens@0: @implementation Stack
jens@0: 
jens@0: 
jens@0: - (id) initWithStartPos: (CGPoint)startPos spacing: (CGSize)spacing
jens@0:            wrapInterval: (int)wrapInterval wrapSpacing: (CGSize)wrapSpacing
jens@0: {
jens@0:     self = [super init];
jens@0:     if (self != nil) {
jens@0:         _startPos = startPos;
jens@0:         _spacing = spacing;
jens@0:         _wrapInterval = wrapInterval;
jens@0:         _wrapSpacing = wrapSpacing;
jens@0:         self.cornerRadius = 8;
jens@0:         self.backgroundColor = kAlmostInvisibleWhiteColor;
jens@0:         self.borderColor = kHighlightColor;
jens@0:         _bits = [[NSMutableArray alloc] init];
jens@0:     }
jens@0:     return self;
jens@0: }
jens@0: 
jens@0: - (id) initWithStartPos: (CGPoint)startPos spacing: (CGSize)spacing;
jens@0: {
jens@0:     return [self initWithStartPos: startPos spacing: spacing 
jens@0:                      wrapInterval: INT_MAX wrapSpacing: CGSizeZero];
jens@0: }
jens@0: 
jens@0: 
jens@0: - (void) dealloc
jens@0: {
jens@0:     [_bits release];
jens@0:     [super dealloc];
jens@0: }
jens@0: 
jens@0: 
jens@0: @synthesize spacing=_spacing, wrapSpacing=_wrapSpacing, startPos=_startPos, wrapInterval=_wrapInterval;
jens@0: @synthesize dragAsStacks=_dragAsStacks;
jens@0: @synthesize bits=_bits;
jens@0: 
jens@0: 
jens@21: - (NSUInteger) numberOfBits
jens@21: {
jens@21:     return _bits.count;
jens@21: }
jens@21: 
jens@21: - (void) setNumberOfBits: (NSUInteger)n
jens@21: {
jens@21:     NSAssert2(n<=_bits.count,@"Cannot increase numberOfBits (from %u to %u)", _bits.count,n);
jens@21:     while( _bits.count > n )
jens@21:         [self removeBit: self.topBit];
jens@21: }
jens@21: 
jens@0: - (Bit*) topBit
jens@0: {
jens@0:     return [_bits lastObject];
jens@0: }
jens@0: 
jens@0: 
jens@0: - (void) dump
jens@0: {
jens@0:     printf("Stack = ");
jens@1:     for( GGBLayer *layer in self.sublayers )
jens@0:         printf("%s @z=%g   ", [[layer description] UTF8String],layer.zPosition);
jens@0:     printf("\n");
jens@0: }
jens@0: 
jens@0: 
jens@0: - (void) x_repositionBit: (Bit*)bit forIndex: (int)i
jens@0: {
jens@0:     bit.position = CGPointMake(_startPos.x + _spacing.width *(i%_wrapInterval) + _wrapSpacing.width *(i/_wrapInterval),
jens@0:                                _startPos.y + _spacing.height*(i%_wrapInterval) + _wrapSpacing.height*(i/_wrapInterval));
jens@0: }
jens@0: 
jens@0: - (void) addBit: (Bit*)bit
jens@0: {
jens@0:     if( [bit isKindOfClass: [DraggedStack class]] ) {
jens@0:         for( Bit *subBit in [(DraggedStack*)bit bits] )
jens@0:             [self addBit: subBit];
jens@0:     } else {
jens@0:         int n = _bits.count;
jens@0:         [_bits addObject: bit];
jens@0:         ChangeSuperlayer(bit, self, n);
jens@0:         [self x_repositionBit: bit forIndex: n];
jens@0:     }
jens@0: }
jens@0: 
jens@0: 
jens@21: - (void) removeBit: (Bit*)bit
jens@21: {
jens@21:     NSUInteger index = [_bits indexOfObjectIdenticalTo: bit];
jens@21:     if( index != NSNotFound ) {
jens@21:         [bit removeFromSuperlayer];
jens@21:         [_bits removeObjectAtIndex: index];
jens@21:     }
jens@21: }
jens@21: 
jens@21: 
jens@0: - (void) setHighlighted: (BOOL)highlighted
jens@0: {
jens@0:     [super setHighlighted: highlighted];
jens@0:     self.borderWidth = (highlighted ?6 :0);
jens@0: }
jens@0: 
jens@0: 
jens@0: - (Bit*) canDragBit: (Bit*)bit
jens@0: {
jens@0:     NSInteger index = [_bits indexOfObjectIdenticalTo: bit];
jens@0:     if( index==NSNotFound )
jens@0:         return nil;
jens@0:     if( _dragAsStacks && index < _bits.count-1 ) {
jens@0:         // Move bit and those above it into a temporary DraggedStack:
jens@0:         NSRange r = NSMakeRange(index,_bits.count-index);
jens@0:         NSArray *bitsToDrag = [_bits subarrayWithRange: r];
jens@0:         [_bits removeObjectsInRange: r];
jens@0:         DraggedStack *stack = [[DraggedStack alloc] initWithBits: bitsToDrag];
jens@0:         [self addSublayer: stack];
jens@0:         [stack release];
jens@0:         stack.anchorPoint = CGPointMake( bit.position.x/stack.bounds.size.width,
jens@0:                                          bit.position.y/stack.bounds.size.height );
jens@0:         stack.position = bit.position;
jens@0:         return stack;
jens@0:     } else {
jens@0:         [bit retain];
jens@0:         [_bits removeObjectIdenticalTo: bit];
jens@0:         return [bit autorelease];
jens@0:     }
jens@0: }
jens@0: 
jens@0: 
jens@0: - (void) cancelDragBit: (Bit*)bit
jens@0: {
jens@0:     [self addBit: bit];
jens@0:     if( [bit isKindOfClass: [DraggedStack class]] ) {
jens@0:         [bit removeFromSuperlayer];
jens@0:     }
jens@0: }
jens@0: 
jens@0: 
jens@0: - (void) draggedBit: (Bit*)bit to: (id<BitHolder>)dst
jens@0: {
jens@0:     int i=0;
jens@0:     for( Bit *bit in self.sublayers )
jens@0:         [self x_repositionBit: bit forIndex: i++];
jens@0: }
jens@0: 
jens@0: 
jens@0: - (BOOL) dropBit: (Bit*)bit atPoint: (CGPoint)point
jens@0: {
jens@0:     [self addBit: bit];
jens@0:     return YES;
jens@0: }
jens@0: 
jens@0: @end
jens@0: 
jens@0: 
jens@0: 
jens@0: 
jens@0: @implementation DraggedStack
jens@0: 
jens@0: 
jens@0: - (id) initWithBits: (NSArray*)bits
jens@0: {
jens@0:     self = [super init];
jens@0:     if( self ) {
jens@0:         CGRect bounds = CGRectZero;
jens@0:         for( Bit *bit in bits ) {
jens@0:             bounds = CGRectUnion(bounds, bit.frame);
jens@0:             [self addSublayer: bit];
jens@0:         }
jens@0:         self.bounds = bounds;
jens@0:         self.anchorPoint = CGPointZero;
jens@0:         self.position = CGPointZero;
jens@0:     }
jens@0:     return self;
jens@0: }
jens@0: 
jens@0: - (NSArray*) bits
jens@0: {
jens@0:     return [self.sublayers.copy autorelease];
jens@0: }
jens@0: 
jens@0: @end