TapViewController.m

/*
     File: TapViewController.m
 Abstract: Controls the main tap view.
  Version: 2.0
 
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 */
 
#import "TapViewController.h"
 
#import "TapView.h"
 
#include <AssertMacros.h>
 
@interface TapViewController () <TapViewDelegate>
 
@end
 
@implementation TapViewController
 
- (id)init
{
    self = [super initWithNibName:nil bundle:nil];
    if (self != nil) {
        // do nothing
    }
    return self;
}
 
- (void)loadCloseButton
{
    UIButton *  closeButton;
    
    closeButton = [[UIButton alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 32.0f, 32.0f)];
    closeButton.contentMode = UIViewContentModeCenter;
    closeButton.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleBottomMargin;
    [closeButton setImage:[UIImage imageNamed:@"cross24"] forState:UIControlStateNormal];
    [closeButton addTarget:self action:@selector(closeButtonAction:) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:closeButton];
}
 
enum {
    kTapViewControllerTapsPerRow = 3
};
 
// The tap count must be an even multiple of the taps per row otherwise this is never 
// going to work.
 
check_compile_time((kTapViewControllerTapItemCount % kTapViewControllerTapsPerRow) == 0);
 
- (void)loadView
{
    // Creates our main view and the tap views embedded within it.  This only creates 
    // the views; the layout is done in viewDidLayoutSubviews.
    
    self.view = [[UIView alloc] initWithFrame:CGRectZero];
    for (NSUInteger x = 0; x < kTapViewControllerTapsPerRow; x++) {
        for (NSUInteger y = 0; y < (kTapViewControllerTapItemCount / kTapViewControllerTapsPerRow); y++) {
            TapView *   tapView;
            
            tapView = [[TapView alloc] initWithFrame:CGRectZero];
            tapView.backgroundColor = [UIColor colorWithHue:((y * kTapViewControllerTapsPerRow + x) / (CGFloat) kTapViewControllerTapItemCount) 
                saturation:0.75 
                brightness:0.75 
                alpha:1.0
            ];
            tapView.tag = (NSInteger) (y * kTapViewControllerTapsPerRow + x + 1);
            tapView.delegate = self;
            [self.view addSubview:tapView];
        }
    }
    
    [self loadCloseButton];
}
 
- (void)viewDidLayoutSubviews
{
    CGRect      frame;
    
    [super viewDidLayoutSubviews];
 
    // Lays out the tap views in a grid.
    
    frame = self.view.bounds;
    frame.size.width  /= (CGFloat) kTapViewControllerTapsPerRow;
    frame.size.height /= (CGFloat) kTapViewControllerTapsPerRow;
    for (NSUInteger x = 0; x < kTapViewControllerTapsPerRow; x++) {
        for (NSUInteger y = 0; y < (kTapViewControllerTapItemCount / kTapViewControllerTapsPerRow); y++) {
            [self.view viewWithTag:(NSInteger) (y * kTapViewControllerTapsPerRow + x + 1)].frame = CGRectMake(
                frame.origin.x + x * frame.size.width, 
                frame.origin.y + y * frame.size.height, 
                frame.size.width,
                frame.size.height
            );
        }
    }
    
    // We don't need to position the close button because the autosizing masks do 
    // what we need.
}
 
- (void)closeButtonAction:(id)sender
{
    #pragma unused(sender)
    if ([self.delegate respondsToSelector:@selector(tapViewControllerDidClose:)]) {
        [self.delegate tapViewControllerDidClose:self];
    }
}
 
#pragma mark * API exposed to our clients
 
- (void)remoteTouchDownOnItem:(NSUInteger)tapItemIndex
{
    assert(tapItemIndex < kTapViewControllerTapItemCount);
    if (self.isViewLoaded) {
        ((TapView *)[self.view viewWithTag:tapItemIndex + 1]).remoteTouch = YES;
    }
}
 
- (void)remoteTouchUpOnItem:(NSUInteger)tapItemIndex
{
    assert(tapItemIndex < kTapViewControllerTapItemCount);
    if (self.isViewLoaded) {
        ((TapView *)[self.view viewWithTag:tapItemIndex + 1]).remoteTouch = NO;
    }
}
 
- (void)resetTouches
{
    for (NSInteger tag = 1; tag <= kTapViewControllerTapItemCount; tag++) {
        TapView *   tapView;
        
        tapView = ((TapView *) [self.view viewWithTag:tag]);
        assert([tapView isKindOfClass:[TapView class]]);
        [tapView resetTouches];
    }
}
 
#pragma mark * Tap view delegate callbacks
 
- (void)tapViewLocalTouchDown:(TapView *)tapView
{
    if ([self.delegate respondsToSelector:@selector(tapViewController:localTouchDownOnItem:)]) {
        assert(tapView.tag != 0);
        assert(tapView.tag <= kTapViewControllerTapItemCount);
        [self.delegate tapViewController:self localTouchDownOnItem:(NSUInteger) ([tapView tag] - 1)];
    }
}
 
- (void)tapViewLocalTouchUp:(TapView *)tapView
{
    if ([self.delegate respondsToSelector:@selector(tapViewController:localTouchUpOnItem:)]) {
        assert(tapView.tag != 0);
        assert(tapView.tag <= kTapViewControllerTapItemCount);
        [self.delegate tapViewController:self localTouchUpOnItem:(NSUInteger) ([tapView tag] - 1)];
    }
}
 
@end