/*

File: DCDiceView.m

Abstract: Dice View Implementation

Version: 1.0

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*/ 

#import "DCDiceView.h"

#import "DCDie.h"

@implementation DCDiceView

// Figure out the die sizes and locations, make DCDies, get background color

- (id)initWithFrame:(NSRect)frameRect

{

    if ((self = [super initWithFrame:frameRect]) != nil) {

        dice = [[NSMutableArray alloc] initWithCapacity: 5];

        float unit = frameRect.size.width / 4.0;

        float doubleUnit = unit * 2.0;

        int i, count = 5;

        DCDie *die = nil;

        for (i = 0; i < count; i++) {

            die = [[DCDie alloc] initWithBounds: NSMakeRect(unit, (3 * i + 1) * unit, doubleUnit, doubleUnit)];

            [die setParent: self]; // Accessiblity related

            [dice addObject: die];

            [die release];

        }

        backgroundColor = [[NSColor colorWithPatternImage:[NSImage imageNamed:@"greenfelt"]] retain];

        isCleared = YES;

        shouldDisplayFocus = NO;

        firstResponderIndex = -1;

    }

    return self;

}

-(void)dealloc {

    [dice release];

    [backgroundColor release];

    [super dealloc];

}

// Draw background and frame.  If not cleared, tell dice to draw.

- (void)drawRect:(NSRect)rect

{

    [backgroundColor set];

    NSRectFill(rect);

    [[NSColor blackColor] set];

    NSFrameRect(rect);

    if (!isCleared) {

        [dice makeObjectsPerformSelector:@selector(draw)];

    }

}

/* On mouse down, hit test the dice.  The mouse handling could be extended to handle tracking more like a standard button - but keeping things simple for this sample code */

-(void)mouseDown:(NSEvent *)event {

    NSPoint localPoint = [self convertPoint:[event locationInWindow] fromView: nil];

    NSEnumerator *enumerator = [dice objectEnumerator];

    DCDie *die = nil;

    while (die = [enumerator nextObject]) {

        if ([die containsPoint: localPoint]) {

            [die toggleHold];

            [self setNeedsDisplay:YES];

        }

    }

}

/* If cleared return empty array.  If dice are showing return NSNumbers of the dice */

-(NSArray *)diceValues {

    if (isCleared) return [NSArray array];

    else return [dice valueForKeyPath:@"spotCount"];

}

-(IBAction)clear:(id)sender {

    [[self window] makeFirstResponder:[self nextValidKeyView]];

    isCleared = YES;

    [dice makeObjectsPerformSelector:@selector(clearFromView)];

    [self setNeedsDisplay:YES];

}

-(IBAction)rollDice:(id)sender {

    isCleared = NO;

    [dice makeObjectsPerformSelector:@selector(roll)];

    [self setNeedsDisplay:YES];

}

-(void)windowDidBecomeKey:(NSNotification *)note {

    shouldDisplayFocus = YES;

    [self setNeedsDisplay:YES];

}

-(void)windowDidResignKey:(NSNotification *)note {

    shouldDisplayFocus = NO;

    [self setNeedsDisplay:YES];

}

-(void)viewDidMoveToWindow {

    NSWindow *window = [self window];

    if (window) {

        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(windowDidBecomeKey:) name:NSWindowDidBecomeKeyNotification object:window];

        [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(windowDidResignKey:) name:NSWindowDidResignKeyNotification object:window];

    } else {

        [[NSNotificationCenter defaultCenter] removeObserver:self name:NSWindowDidBecomeKeyNotification object:nil];

        [[NSNotificationCenter defaultCenter] removeObserver:self name:NSWindowDidResignKeyNotification object:nil];

    }

}

/* Need to enable full keyboard navigation for this NSView subclass.

*/

-(BOOL)acceptsFirstResponder {

    return !isCleared;

}

/* As we are asked to resign or become first responder, we need to manage

    which die within should have focus.

*/

-(BOOL)becomeFirstResponder {

    if (isCleared) {

        return NO;

    }

    if ([[self window] keyViewSelectionDirection] == NSDirectSelection) {

        if (firstResponderIndex == -1) {

            return NO;

        }

    } else if ([[self window] keyViewSelectionDirection] == NSSelectingNext) {

        firstResponderIndex = 4;

    } else {

        firstResponderIndex = 0;

    }

    [[dice objectAtIndex: firstResponderIndex] setFocus:YES];

    [self setNeedsDisplay:YES];

    return YES;

}

-(BOOL)resignFirstResponder {

    BOOL returnValue = YES;

    if ([[self window] keyViewSelectionDirection] == NSDirectSelection) {

        [[dice objectAtIndex: firstResponderIndex] setFocus:NO];

        firstResponderIndex = -1;

        returnValue = YES;

    } else if ([[self window] keyViewSelectionDirection] == NSSelectingNext) {

        if (firstResponderIndex == 0) {

            [[dice objectAtIndex: firstResponderIndex] setFocus:NO];

            firstResponderIndex = -1;

            returnValue = YES;

        }

        else {

            [[dice objectAtIndex: firstResponderIndex] setFocus:NO];

            [[dice objectAtIndex: --firstResponderIndex] setFocus:YES];

            returnValue = NO;

        }

    } else {

        if (firstResponderIndex == 4) {

            [[dice objectAtIndex: firstResponderIndex] setFocus:NO];

            firstResponderIndex = -1;

            returnValue = YES;

        }

        else {

            [[dice objectAtIndex: firstResponderIndex] setFocus:NO];

            [[dice objectAtIndex: ++firstResponderIndex] setFocus:YES];

            returnValue = NO;

        }

    }

    // If we respond NO, Cocoa doesn't know the focus has changed within us.  We need to send notification.

    if (returnValue == NO) NSAccessibilityPostNotification(self, NSAccessibilityFocusedUIElementChangedNotification);   // Accessibility Related

    [self setNeedsDisplay:YES];

    return returnValue;

}

/* Key events when first responder */

-(void)keyDown:(NSEvent *)event {

    // If the space bar was pressed, toggle hold on the first responder

    if ([[event characters] isEqualToString:@" "]) {

        [[dice objectAtIndex:firstResponderIndex] toggleHold];

        [self setNeedsDisplay:YES];

    } else {

        // We do care about our superclass dealing with tab shift-tab for first responder changes

        [super keyDown: event];

    }

}

-(BOOL)shouldDisplayFocus {

    return shouldDisplayFocus;

}

-(void)setFocusedDie:(DCDie *)die {

    if (die) {

        int index = [dice indexOfObject: die];

        if (index != NSNotFound) {

            // If we're already focused, unfocus current die

            if (firstResponderIndex != -1) {

                [[dice objectAtIndex:firstResponderIndex] setFocus:NO];

            }

            firstResponderIndex = index;

            [die setFocus: YES];

            [self setNeedsDisplay: YES];

            // Ask window to make us the first responder

            [[self window] makeFirstResponder: self];

        }

    }

}

@end