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 "BoardView.h"
jens@0: #import "Bit.h"
jens@0: #import "BitHolder.h"
jens@0: #import "Game.h"
jens@12: #import "Turn.h"
jens@10: #import "Player.h"
jens@0: #import "QuartzUtils.h"
jens@0: #import "GGBUtils.h"
jens@0: 
jens@0: 
jens@3: @interface BoardView ()
jens@3: - (void) _findDropTarget: (NSPoint)pos;
jens@3: @end
jens@3: 
jens@3: 
jens@0: @implementation BoardView
jens@0: 
jens@0: 
jens@10: @synthesize gameboard=_gameboard;
jens@0: 
jens@0: 
jens@0: - (void) dealloc
jens@0: {
jens@0:     [_game release];
jens@0:     [super dealloc];
jens@0: }
jens@0: 
jens@0: 
jens@10: - (void) _removeGameBoard
jens@10: {
jens@10:     if( _gameboard ) {
jens@10:         RemoveImmediately(_gameboard);
jens@10:         _gameboard = nil;
jens@10:     }
jens@10: }
jens@10: 
jens@10: - (void) createGameBoard
jens@10: {
jens@10:     [self _removeGameBoard];
jens@10:     _gameboard = [[CALayer alloc] init];
jens@10:     _gameboard.frame = [self gameBoardFrame];
jens@10:     _gameboard.autoresizingMask = kCALayerMinXMargin | kCALayerMaxXMargin | kCALayerMinYMargin | kCALayerMaxYMargin;
jens@10: 
jens@10:     // Tell the game to set up the board:
jens@10:     _game.board = _gameboard;
jens@10: 
jens@10:     [self.layer addSublayer: _gameboard];
jens@10:     [_gameboard release];
jens@10: }
jens@10: 
jens@10: 
jens@10: - (Game*) game
jens@10: {
jens@10:     return _game;
jens@10: }
jens@10: 
jens@10: - (void) setGame: (Game*)game
jens@10: {
jens@10:     if( game!=_game ) {
jens@14:         _game.board = nil;
jens@10:         setObj(&_game,game);
jens@10:         [self createGameBoard];
jens@10:     }
jens@10: }
jens@10: 
jens@0: - (void) startGameNamed: (NSString*)gameClassName
jens@0: {
jens@10:     Class gameClass = NSClassFromString(gameClassName);
jens@10:     Game *game = [[gameClass alloc] init];
jens@10:     if( game ) {
jens@10:         self.game = game;
jens@10:         [game release];
jens@0:     }
jens@10: }
jens@10: 
jens@10: 
jens@0: - (CGRect) gameBoardFrame
jens@0: {
jens@0:     return self.layer.bounds;
jens@0: }
jens@0: 
jens@0: 
jens@0: - (void)resetCursorRects
jens@0: {
jens@0:     [super resetCursorRects];
jens@15:     if( _game.okToMove )
jens@10:         [self addCursorRect: self.bounds cursor: [NSCursor openHandCursor]];
jens@0: }
jens@0: 
jens@0: 
jens@0: - (IBAction) enterFullScreen: (id)sender
jens@0: {
jens@10:     [self _removeGameBoard];
jens@0:     if( self.isInFullScreenMode ) {
jens@0:         [self exitFullScreenModeWithOptions: nil];
jens@0:     } else {
jens@0:         [self enterFullScreenMode: self.window.screen 
jens@0:                       withOptions: nil];
jens@0:     }
jens@10:     [self createGameBoard];
jens@10: }
jens@10: 
jens@10: 
jens@10: - (void)viewWillStartLiveResize
jens@10: {
jens@10:     [super viewWillStartLiveResize];
jens@10:     _oldSize = self.frame.size;
jens@10: }
jens@10: 
jens@10: - (void)setFrameSize:(NSSize)newSize
jens@10: {
jens@10:     [super setFrameSize: newSize];
jens@10:     if( _oldSize.width > 0.0f ) {
jens@10:         CGAffineTransform xform = _gameboard.affineTransform;
jens@10:         xform.a = xform.d = MIN(newSize.width,newSize.height)/MIN(_oldSize.width,_oldSize.height);
jens@10:         _gameboard.affineTransform = xform;
jens@10:     } else
jens@10:         [self createGameBoard];
jens@10: }
jens@10: 
jens@10: - (void)viewDidEndLiveResize
jens@10: {
jens@10:     [super viewDidEndLiveResize];
jens@10:     _oldSize.width = _oldSize.height = 0.0f;
jens@10:     [self createGameBoard];
jens@0: }
jens@0: 
jens@0: 
jens@0: #pragma mark -
jens@0: #pragma mark KEY EVENTS:
jens@0: 
jens@0: 
jens@0: - (void) keyDown: (NSEvent*)ev
jens@0: {
jens@0:     if( self.isInFullScreenMode ) {
jens@0:         if( [ev.charactersIgnoringModifiers hasPrefix: @"\033"] )       // Esc key
jens@0:             [self enterFullScreen: self];
jens@0:     }
jens@0: }
jens@0: 
jens@0: 
jens@0: #pragma mark -
jens@0: #pragma mark HIT-TESTING:
jens@0: 
jens@0: 
jens@5: /** Converts a point from window coords, to this view's root layer's coords. */
jens@5: - (CGPoint) _convertPointFromWindowToLayer: (NSPoint)locationInWindow
jens@5: {
jens@5:     NSPoint where = [self convertPoint: locationInWindow fromView: nil];    // convert to view coords
jens@5:     return NSPointToCGPoint( [self convertPointToBase: where] );            // then to layer coords
jens@5: }
jens@5: 
jens@5: 
jens@0: // Hit-testing callbacks (to identify which layers caller is interested in):
jens@0: typedef BOOL (*LayerMatchCallback)(CALayer*);
jens@0: 
jens@0: static BOOL layerIsBit( CALayer* layer )        {return [layer isKindOfClass: [Bit class]];}
jens@0: static BOOL layerIsBitHolder( CALayer* layer )  {return [layer conformsToProtocol: @protocol(BitHolder)];}
jens@0: static BOOL layerIsDropTarget( CALayer* layer ) {return [layer respondsToSelector: @selector(draggingEntered:)];}
jens@0: 
jens@0: 
jens@0: /** Locates the layer at a given point in window coords.
jens@0:     If the leaf layer doesn't pass the layer-match callback, the nearest ancestor that does is returned.
jens@0:     If outOffset is provided, the point's position relative to the layer is stored into it. */
jens@0: - (CALayer*) hitTestPoint: (NSPoint)locationInWindow
jens@0:          forLayerMatching: (LayerMatchCallback)match
jens@0:                    offset: (CGPoint*)outOffset
jens@0: {
jens@5:     CGPoint where = [self _convertPointFromWindowToLayer: locationInWindow ];
jens@0:     CALayer *layer = [_gameboard hitTest: where];
jens@0:     while( layer ) {
jens@0:         if( match(layer) ) {
jens@0:             CGPoint bitPos = [self.layer convertPoint: layer.position 
jens@0:                               fromLayer: layer.superlayer];
jens@0:             if( outOffset )
jens@0:                 *outOffset = CGPointMake( bitPos.x-where.x, bitPos.y-where.y);
jens@0:             return layer;
jens@0:         } else
jens@0:             layer = layer.superlayer;
jens@0:     }
jens@0:     return nil;
jens@0: }
jens@0: 
jens@0: 
jens@0: #pragma mark -
jens@0: #pragma mark MOUSE CLICKS & DRAGS:
jens@0: 
jens@0: 
jens@0: - (void) mouseDown: (NSEvent*)ev
jens@0: {
jens@15:     if( ! _game.okToMove ) {
jens@10:         NSBeep();
jens@10:         return;
jens@10:     }
jens@10:     
jens@3:     BOOL placing = NO;
jens@0:     _dragStartPos = ev.locationInWindow;
jens@0:     _dragBit = (Bit*) [self hitTestPoint: _dragStartPos
jens@0:                         forLayerMatching: layerIsBit 
jens@0:                                   offset: &_dragOffset];
jens@3:     
jens@3:     if( ! _dragBit ) {
jens@3:         // If no bit was clicked, see if it's a BitHolder the game will let the user add a Bit to:
jens@3:         id<BitHolder> holder = (id<BitHolder>) [self hitTestPoint: _dragStartPos
jens@3:                                                  forLayerMatching: layerIsBitHolder
jens@3:                                                            offset: NULL];
jens@3:         if( holder ) {
jens@3:             _dragBit = [_game bitToPlaceInHolder: holder];
jens@3:             if( _dragBit ) {
jens@3:                 _dragOffset.x = _dragOffset.y = 0;
jens@3:                 if( _dragBit.superlayer==nil )
jens@5:                     _dragBit.position = [self _convertPointFromWindowToLayer: _dragStartPos];
jens@3:                 placing = YES;
jens@3:             }
jens@3:         }
jens@3:     }
jens@3:     
jens@3:     if( ! _dragBit ) {
jens@3:         Beep();
jens@3:         return;
jens@3:     }
jens@3:     
jens@3:     // Clicked on a Bit:
jens@3:     _dragMoved = NO;
jens@3:     _dropTarget = nil;
jens@3:     _oldHolder = _dragBit.holder;
jens@3:     // Ask holder's and game's permission before dragging:
jens@3:     if( _oldHolder ) {
jens@3:         _dragBit = [_oldHolder canDragBit: _dragBit];
jens@0:         if( _dragBit && ! [_game canBit: _dragBit moveFrom: _oldHolder] ) {
jens@0:             [_oldHolder cancelDragBit: _dragBit];
jens@0:             _dragBit = nil;
jens@0:         }
jens@0:         if( ! _dragBit ) {
jens@0:             _oldHolder = nil;
jens@0:             NSBeep();
jens@0:             return;
jens@0:         }
jens@3:     }
jens@3:     
jens@3:     // Start dragging:
jens@3:     _oldSuperlayer = _dragBit.superlayer;
jens@3:     _oldLayerIndex = [_oldSuperlayer.sublayers indexOfObjectIdenticalTo: _dragBit];
jens@3:     _oldPos = _dragBit.position;
jens@3:     ChangeSuperlayer(_dragBit, self.layer, self.layer.sublayers.count);
jens@3:     _dragBit.pickedUp = YES;
jens@3:     [[NSCursor closedHandCursor] push];
jens@3:     
jens@3:     if( placing ) {
jens@3:         if( _oldSuperlayer )
jens@5:             _dragBit.position = [self _convertPointFromWindowToLayer: _dragStartPos];
jens@3:         _dragMoved = YES;
jens@3:         [self _findDropTarget: _dragStartPos];
jens@3:     }
jens@0: }
jens@0: 
jens@3: 
jens@0: - (void) mouseDragged: (NSEvent*)ev
jens@0: {
jens@0:     if( _dragBit ) {
jens@0:         // Get the mouse position, and see if we've moved 3 pixels since the mouseDown:
jens@0:         NSPoint pos = ev.locationInWindow;
jens@0:         if( fabs(pos.x-_dragStartPos.x)>=3 || fabs(pos.y-_dragStartPos.y)>=3 )
jens@0:             _dragMoved = YES;
jens@0:         
jens@0:         // Move the _dragBit (without animation -- it's unnecessary and slows down responsiveness):
jens@5:         CGPoint where = [self _convertPointFromWindowToLayer: pos];
jens@0:         where.x += _dragOffset.x;
jens@0:         where.y += _dragOffset.y;
jens@0:         
jens@5:         CGPoint newPos = [_dragBit.superlayer convertPoint: where fromLayer: self.layer];
jens@0: 
jens@0:         [CATransaction flush];
jens@0:         [CATransaction begin];
jens@0:         [CATransaction setValue:(id)kCFBooleanTrue
jens@0:                          forKey:kCATransactionDisableActions];
jens@0:         _dragBit.position = newPos;
jens@0:         [CATransaction commit];
jens@0: 
jens@0:         // Find what it's over:
jens@3:         [self _findDropTarget: pos];
jens@3:     }
jens@3: }
jens@3: 
jens@3: 
jens@3: - (void) _findDropTarget: (NSPoint)locationInWindow
jens@3: {
jens@3:     locationInWindow.x += _dragOffset.x;
jens@3:     locationInWindow.y += _dragOffset.y;
jens@3:     id<BitHolder> target = (id<BitHolder>) [self hitTestPoint: locationInWindow
jens@3:                                              forLayerMatching: layerIsBitHolder
jens@3:                                                        offset: NULL];
jens@3:     if( target == _oldHolder )
jens@3:         target = nil;
jens@3:     if( target != _dropTarget ) {
jens@3:         [_dropTarget willNotDropBit: _dragBit];
jens@3:         _dropTarget.highlighted = NO;
jens@3:         _dropTarget = nil;
jens@3:     }
jens@3:     if( target ) {
jens@3:         CGPoint targetPos = [(CALayer*)target convertPoint: _dragBit.position
jens@3:                                                  fromLayer: _dragBit.superlayer];
jens@3:         if( [target canDropBit: _dragBit atPoint: targetPos]
jens@3:            && [_game canBit: _dragBit moveFrom: _oldHolder to: target] ) {
jens@3:             _dropTarget = target;
jens@3:             _dropTarget.highlighted = YES;
jens@0:         }
jens@0:     }
jens@0: }
jens@0: 
jens@3: 
jens@0: - (void) mouseUp: (NSEvent*)ev
jens@0: {
jens@0:     if( _dragBit ) {
jens@0:         if( _dragMoved ) {
jens@0:             // Update the drag tracking to the final mouse position:
jens@0:             [self mouseDragged: ev];
jens@0:             _dropTarget.highlighted = NO;
jens@0:             _dragBit.pickedUp = NO;
jens@0: 
jens@0:             // Is the move legal?
jens@0:             if( _dropTarget && [_dropTarget dropBit: _dragBit
jens@0:                                             atPoint: [(CALayer*)_dropTarget convertPoint: _dragBit.position 
jens@0:                                                                             fromLayer: _dragBit.superlayer]] ) {
jens@0:                 // Yes, notify the interested parties:
jens@0:                 [_oldHolder draggedBit: _dragBit to: _dropTarget];
jens@0:                 [_game bit: _dragBit movedFrom: _oldHolder to: _dropTarget];
jens@0:             } else {
jens@0:                 // Nope, cancel:
jens@0:                 [_dropTarget willNotDropBit: _dragBit];
jens@3:                 if( _oldSuperlayer ) {
jens@3:                     ChangeSuperlayer(_dragBit, _oldSuperlayer, _oldLayerIndex);
jens@3:                     _dragBit.position = _oldPos;
jens@3:                     [_oldHolder cancelDragBit: _dragBit];
jens@3:                 } else {
jens@3:                     [_dragBit removeFromSuperlayer];
jens@3:                 }
jens@0:             }
jens@0:         } else {
jens@0:             // Just a click, without a drag:
jens@0:             _dropTarget.highlighted = NO;
jens@0:             _dragBit.pickedUp = NO;
jens@0:             ChangeSuperlayer(_dragBit, _oldSuperlayer, _oldLayerIndex);
jens@0:             [_oldHolder cancelDragBit: _dragBit];
jens@0:             if( ! [_game clickedBit: _dragBit] )
jens@0:                 NSBeep();
jens@0:         }
jens@9: 
jens@0:         _dropTarget = nil;
jens@0:         _dragBit = nil;
jens@0:         [NSCursor pop];
jens@0:     }
jens@0: }
jens@0: 
jens@0: 
jens@0: #pragma mark -
jens@0: #pragma mark INCOMING DRAGS:
jens@0: 
jens@0: 
jens@0: // subroutine to call the target
jens@0: static int tell( id target, SEL selector, id arg, int defaultValue )
jens@0: {
jens@0:     if( target && [target respondsToSelector: selector] )
jens@0:         return (ssize_t) [target performSelector: selector withObject: arg];
jens@0:     else
jens@0:         return defaultValue;
jens@0: }
jens@0: 
jens@0: 
jens@0: - (NSDragOperation)draggingEntered:(id <NSDraggingInfo>)sender
jens@0: {
jens@0:     _viewDropTarget = [self hitTestPoint: [sender draggingLocation]
jens@0:                         forLayerMatching: layerIsDropTarget
jens@0:                                   offset: NULL];
jens@0:     _viewDropOp = _viewDropTarget ?[_viewDropTarget draggingEntered: sender] :NSDragOperationNone;
jens@0:     return _viewDropOp;
jens@0: }
jens@0: 
jens@0: - (NSDragOperation)draggingUpdated:(id <NSDraggingInfo>)sender
jens@0: {
jens@0:     CALayer *target = [self hitTestPoint: [sender draggingLocation]
jens@0:                         forLayerMatching: layerIsDropTarget 
jens@0:                                   offset: NULL];
jens@0:     if( target == _viewDropTarget ) {
jens@0:         if( _viewDropTarget )
jens@0:             _viewDropOp = tell(_viewDropTarget,@selector(draggingUpdated:),sender,_viewDropOp);
jens@0:     } else {
jens@0:         tell(_viewDropTarget,@selector(draggingExited:),sender,0);
jens@0:         _viewDropTarget = target;
jens@0:         if( _viewDropTarget )
jens@0:             _viewDropOp = [_viewDropTarget draggingEntered: sender];
jens@0:         else
jens@0:             _viewDropOp = NSDragOperationNone;
jens@0:     }
jens@0:     return _viewDropOp;
jens@0: }
jens@0: 
jens@0: - (BOOL)wantsPeriodicDraggingUpdates
jens@0: {
jens@0:     return (_viewDropTarget!=nil);
jens@0: }
jens@0: 
jens@0: - (void)draggingExited:(id <NSDraggingInfo>)sender
jens@0: {
jens@0:     tell(_viewDropTarget,@selector(draggingExited:),sender,0);
jens@0:     _viewDropTarget = nil;
jens@0: }
jens@0: 
jens@0: - (BOOL)prepareForDragOperation:(id <NSDraggingInfo>)sender
jens@0: {
jens@0:     return tell(_viewDropTarget,@selector(prepareForDragOperation:),sender,YES);
jens@0: }
jens@0: 
jens@0: - (BOOL)performDragOperation:(id <NSDraggingInfo>)sender
jens@0: {
jens@0:     return [_viewDropTarget performDragOperation: sender];
jens@0: }
jens@0: 
jens@0: - (void)concludeDragOperation:(id <NSDraggingInfo>)sender
jens@0: {
jens@0:     tell(_viewDropTarget,@selector(concludeDragOperation:),sender,0);
jens@0: }
jens@0: 
jens@0: - (void)draggingEnded:(id <NSDraggingInfo>)sender
jens@0: {
jens@0:     tell(_viewDropTarget,@selector(draggingEnded:),sender,0);
jens@0: }
jens@0: 
jens@0: @end