jens@1: //
jens@1: //  BoardUIView.m
jens@1: //  GeekGameBoard
jens@1: //
jens@1: //  Created by Jens Alfke on 3/7/08.
jens@1: //  Copyright 2008 __MyCompanyName__. All rights reserved.
jens@1: //
jens@1: 
jens@1: #import "BoardUIView.h"
jens@1: #import "Bit.h"
jens@1: #import "BitHolder.h"
jens@1: #import "Game.h"
jens@1: #import "QuartzUtils.h"
jens@1: #import "GGBUtils.h"
jens@1: 
jens@1: 
jens@1: @implementation BoardUIView
jens@1: 
jens@1: 
jens@1: - (id)initWithFrame:(CGRect)frame {
jens@1:     if ( (self = [super initWithFrame:frame]) ) {
jens@1:         // Initialization code here.
jens@1:     }
jens@1:     return self;
jens@1: }
jens@1: 
jens@1: 
jens@1: - (void)dealloc
jens@1: {
jens@1:     [_game release];
jens@1:     [super dealloc];
jens@1: }
jens@1: 
jens@1: 
jens@1: @synthesize game=_game, gameboard=_gameboard;
jens@1: 
jens@1: 
jens@1: - (void) startGameNamed: (NSString*)gameClassName
jens@1: {
jens@1:     if( _gameboard ) {
jens@1:         [_gameboard removeFromSuperlayer];
jens@1:         _gameboard = nil;
jens@1:     }
jens@1:     _gameboard = [[GGBLayer alloc] init];
jens@1:     _gameboard.frame = [self gameBoardFrame];
jens@1:     _gameboard.autoresizingMask = kCALayerWidthSizable | kCALayerHeightSizable;
jens@1:     [self.layer addSublayer: _gameboard];
jens@1:     [_gameboard release];
jens@1:     
jens@1:     Class gameClass = NSClassFromString(gameClassName);
jens@1:     NSAssert1(gameClass,@"Unknown game '%@'",gameClassName);
jens@1:     setObj(&_game, [[gameClass alloc] initWithBoard: _gameboard]);
jens@1: }
jens@1: 
jens@1: 
jens@1: - (CGRect) gameBoardFrame
jens@1: {
jens@1:     return self.layer.bounds;
jens@1: }
jens@1: 
jens@1: 
jens@1: #pragma mark -
jens@1: #pragma mark HIT-TESTING:
jens@1: 
jens@1: 
jens@1: // Hit-testing callbacks (to identify which layers caller is interested in):
jens@1: typedef BOOL (*LayerMatchCallback)(CALayer*);
jens@1: 
jens@1: static BOOL layerIsBit( CALayer* layer )        {return [layer isKindOfClass: [Bit class]];}
jens@1: static BOOL layerIsBitHolder( CALayer* layer )  {return [layer conformsToProtocol: @protocol(BitHolder)];}
jens@1: 
jens@1: 
jens@1: /** Locates the layer at a given point in window coords.
jens@1:     If the leaf layer doesn't pass the layer-match callback, the nearest ancestor that does is returned.
jens@1:     If outOffset is provided, the point's position relative to the layer is stored into it. */
jens@1: - (CALayer*) hitTestPoint: (CGPoint)where
jens@1:          forLayerMatching: (LayerMatchCallback)match
jens@1:                    offset: (CGPoint*)outOffset
jens@1: {
jens@1:     where = [_gameboard convertPoint: where fromLayer: self.layer];
jens@1:     CALayer *layer = [_gameboard hitTest: where];
jens@1:     while( layer ) {
jens@1:         if( match(layer) ) {
jens@1:             CGPoint bitPos = [self.layer convertPoint: layer.position 
jens@1:                               fromLayer: layer.superlayer];
jens@1:             if( outOffset )
jens@1:                 *outOffset = CGPointMake( bitPos.x-where.x, bitPos.y-where.y);
jens@1:             return layer;
jens@1:         } else
jens@1:             layer = layer.superlayer;
jens@1:     }
jens@1:     return nil;
jens@1: }
jens@1: 
jens@1: 
jens@1: #pragma mark -
jens@1: #pragma mark MOUSE CLICKS & DRAGS:
jens@1: 
jens@1: 
jens@1: - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
jens@1: {
jens@1:     NSAssert(touches.count==1,@"No multitouch support yet");
jens@1:     UITouch *touch = touches.anyObject;
jens@1:     
jens@1:     _dragStartPos = touch.locationInView;
jens@1:     _dragBit = (Bit*) [self hitTestPoint: _dragStartPos
jens@1:                         forLayerMatching: layerIsBit 
jens@1:                                   offset: &_dragOffset];
jens@1:     if( _dragBit ) {
jens@1:         _dragMoved = NO;
jens@1:         _dropTarget = nil;
jens@1:         _oldHolder = _dragBit.holder;
jens@1:         // Ask holder's and game's permission before dragging:
jens@1:         if( _oldHolder )
jens@1:             _dragBit = [_oldHolder canDragBit: _dragBit];
jens@1:         if( _dragBit && ! [_game canBit: _dragBit moveFrom: _oldHolder] ) {
jens@1:             [_oldHolder cancelDragBit: _dragBit];
jens@1:             _dragBit = nil;
jens@1:         }
jens@1:         if( ! _dragBit ) {
jens@1:             _oldHolder = nil;
jens@1:             Beep();
jens@1:             return;
jens@1:         }
jens@1:         // Start dragging:
jens@1:         _oldSuperlayer = _dragBit.superlayer;
jens@1:         _oldLayerIndex = [_oldSuperlayer.sublayers indexOfObjectIdenticalTo: _dragBit];
jens@1:         _oldPos = _dragBit.position;
jens@1:         ChangeSuperlayer(_dragBit, self.layer, self.layer.sublayers.count);
jens@1:         _dragBit.pickedUp = YES;
jens@1:     } else
jens@1:         Beep();
jens@1: }
jens@1: 
jens@1: 
jens@1: - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
jens@1: {
jens@1:     NSAssert(touches.count==1,@"No multitouch support yet");
jens@1:     UITouch *touch = touches.anyObject;
jens@1:     
jens@1:     if( _dragBit ) {
jens@1:         // Get the mouse position, and see if we've moved 3 pixels since the mouseDown:
jens@1:         CGPoint pos = touch.locationInView;
jens@1:         if( fabs(pos.x-_dragStartPos.x)>=3 || fabs(pos.y-_dragStartPos.y)>=3 )
jens@1:             _dragMoved = YES;
jens@1:         
jens@1:         // Move the _dragBit (without animation -- it's unnecessary and slows down responsiveness):
jens@1:         pos.x += _dragOffset.x;
jens@1:         pos.y += _dragOffset.y;
jens@1:         
jens@1:         CGPoint newPos = [_dragBit.superlayer convertPoint: pos fromLayer: self.layer];
jens@1: 
jens@1:         [CATransaction flush];
jens@1:         [CATransaction begin];
jens@1:         [CATransaction setValue:(id)kCFBooleanTrue
jens@1:                          forKey:kCATransactionDisableActions];
jens@1:         _dragBit.position = newPos;
jens@1:         [CATransaction commit];
jens@1: 
jens@1:         // Find what it's over:
jens@1:         id<BitHolder> target = (id<BitHolder>) [self hitTestPoint: pos
jens@1:                                                  forLayerMatching: layerIsBitHolder
jens@1:                                                            offset: NULL];
jens@1:         if( target == _oldHolder )
jens@1:             target = nil;
jens@1:         if( target != _dropTarget ) {
jens@1:             [_dropTarget willNotDropBit: _dragBit];
jens@1:             _dropTarget.highlighted = NO;
jens@1:             _dropTarget = nil;
jens@1:         }
jens@1:         if( target ) {
jens@1:             CGPoint targetPos = [(CALayer*)target convertPoint: _dragBit.position
jens@1:                                                      fromLayer: _dragBit.superlayer];
jens@1:             if( [target canDropBit: _dragBit atPoint: targetPos]
jens@1:                && [_game canBit: _dragBit moveFrom: _oldHolder to: target] ) {
jens@1:                 _dropTarget = target;
jens@1:                 _dropTarget.highlighted = YES;
jens@1:             }
jens@1:         }
jens@1:     }
jens@1: }
jens@1: 
jens@1: 
jens@1: - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
jens@1: {
jens@1:     if( _dragBit ) {
jens@1:         if( _dragMoved ) {
jens@1:             // Update the drag tracking to the final mouse position:
jens@1:             [self touchesMoved: touches withEvent: event];
jens@1:             _dropTarget.highlighted = NO;
jens@1:             _dragBit.pickedUp = NO;
jens@1: 
jens@1:             // Is the move legal?
jens@1:             if( _dropTarget && [_dropTarget dropBit: _dragBit
jens@1:                                             atPoint: [(CALayer*)_dropTarget convertPoint: _dragBit.position 
jens@1:                                                                             fromLayer: _dragBit.superlayer]] ) {
jens@1:                 // Yes, notify the interested parties:
jens@1:                 [_oldHolder draggedBit: _dragBit to: _dropTarget];
jens@1:                 [_game bit: _dragBit movedFrom: _oldHolder to: _dropTarget];
jens@1:             } else {
jens@1:                 // Nope, cancel:
jens@1:                 [_dropTarget willNotDropBit: _dragBit];
jens@1:                 ChangeSuperlayer(_dragBit, _oldSuperlayer, _oldLayerIndex);
jens@1:                 _dragBit.position = _oldPos;
jens@1:                 [_oldHolder cancelDragBit: _dragBit];
jens@1:             }
jens@1:         } else {
jens@1:             // Just a click, without a drag:
jens@1:             _dropTarget.highlighted = NO;
jens@1:             _dragBit.pickedUp = NO;
jens@1:             ChangeSuperlayer(_dragBit, _oldSuperlayer, _oldLayerIndex);
jens@1:             [_oldHolder cancelDragBit: _dragBit];
jens@1:             if( ! [_game clickedBit: _dragBit] )
jens@1:                 Beep();
jens@1:         }
jens@1:         _dropTarget = nil;
jens@1:         _dragBit = nil;
jens@1:     }
jens@1: }
jens@1: 
jens@1: 
jens@1: @end