/UICatalog/ControlsViewController.m

/*
     File: ControlsViewController.m 
 Abstract: The view controller for hosting the UIControls features of this sample. 
  Version: 2.10 
  
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 */

#import "ControlsViewController.h"
#import "Constants.h"

#define kSliderHeight			7.0
#define kProgressIndicatorSize	40.0

#define kUIProgressBarWidth		160.0
#define kUIProgressBarHeight	24.0

#define kViewTag				1		// for tagging our embedded controls for removal at cell recycle time

static NSString *kSectionTitleKey = @"sectionTitleKey";
static NSString *kLabelKey = @"labelKey";
static NSString *kSourceKey = @"sourceKey";
static NSString *kViewKey = @"viewKey";

#pragma mark -

@interface ControlsViewController (forwardDeclarations)
- (void)tintAction:(id)sender;
@end

@implementation ControlsViewController

@synthesize dataSourceArray, switchCtl, sliderCtl, customSlider, pageControl, progressInd, progressBar, stepper, progressIndSavedColor;

- (void)dealloc
{	
	[switchCtl release];
	[sliderCtl release];
	[customSlider release];
	[pageControl release];
	[progressInd release];
    [progressIndSavedColor release];
	[progressBar release];
	[stepper release];
	[dataSourceArray release];

	[super dealloc];
}

- (void)viewDidLoad
{	
    [super viewDidLoad];
    
	self.title = NSLocalizedString(@"ControlsTitle", @"");

	self.dataSourceArray = [NSMutableArray arrayWithObjects:
							[NSDictionary dictionaryWithObjectsAndKeys:
								 @"UISwitch", kSectionTitleKey,
								 @"Standard Switch", kLabelKey,
								 @"ControlsViewController.m:\r-(UISwitch *)switchCtl", kSourceKey,
								 self.switchCtl, kViewKey,
							 nil],

							[NSDictionary dictionaryWithObjectsAndKeys:
								 @"UISlider", kSectionTitleKey,
								 @"Standard Slider", kLabelKey,
								 @"ControlsViewController.m:\r-(UISlider *)sliderCtl", kSourceKey,
								 self.sliderCtl, kViewKey,
							 nil],
							
							[NSDictionary dictionaryWithObjectsAndKeys:
								 @"UISlider", kSectionTitleKey,
								 @"Customized Slider", kLabelKey,
								 @"ControlsViewController.m:\r-(UISlider *)customSlider", kSourceKey,
								 self.customSlider, kViewKey,
							 nil],
							
							[NSDictionary dictionaryWithObjectsAndKeys:
								 @"UIPageControl", kSectionTitleKey,
								 @"Ten Pages", kLabelKey,
								 @"ControlsViewController.m:\r-(UIPageControl *)pageControl", kSourceKey,
								 self.pageControl, kViewKey,
							 nil],
							
							[NSDictionary dictionaryWithObjectsAndKeys:
								 @"UIActivityIndicatorView", kSectionTitleKey,
								 @"Style Gray", kLabelKey,
								 @"ControlsViewController.m:\r-(UIActivityIndicatorView *)progressInd", kSourceKey,
								 self.progressInd, kViewKey,
							 nil],
							
							[NSDictionary dictionaryWithObjectsAndKeys:
								 @"UIProgressView", kSectionTitleKey,
								 @"Style Default", kLabelKey,
								 @"ControlsViewController.m:\r-(UIProgressView *)progressBar", kSourceKey,
								 self.progressBar, kViewKey,
							 nil],
                            
							nil];
    
    // add a UIStepper class section (if available)
    if ([UIStepper class])
    {
        [self.dataSourceArray addObject:[NSDictionary dictionaryWithObjectsAndKeys:
                                 @"UIStepper", kSectionTitleKey,
                                 @"Stepper 1 to 10", kLabelKey,
                                 @"ControlsViewController.m:\r-(UIStepper *)stepper", kSourceKey,
                                 self.stepper, kViewKey,
                              nil]];
    }
    
    // provide tint coloring only if its available
    if ([sliderCtl respondsToSelector:@selector(minimumTrackTintColor)])
    {
        // add tint bar button
        UIBarButtonItem *tintButton = [[UIBarButtonItem alloc] initWithTitle:@"Tinted"
                                                                       style:UIBarButtonItemStyleBordered
                                                                      target:self
                                                                      action:@selector(tintAction:)];
        self.navigationItem.rightBarButtonItem = tintButton;
        [tintButton release];
    }
}

// called after the view controller's view is released and set to nil.
// For example, a memory warning which causes the view to be purged. Not invoked as a result of -dealloc.
// So release any properties that are loaded in viewDidLoad or can be recreated lazily.
//
- (void)viewDidUnload 
{
    [super viewDidUnload];
	
	// release the controls and set them nil in case they were ever created
	// note: we can't use "self.xxx = nil" since they are read only properties
	//
	[switchCtl release];
    switchCtl = nil;
    [sliderCtl release];
    sliderCtl = nil;
    [customSlider release];
    customSlider = nil;
    [pageControl release];
    pageControl = nil;
    [progressInd release];
    progressInd = nil;
    [progressBar release];
    progressBar = nil;
	[stepper release];
    stepper = nil;
    
	self.dataSourceArray = nil;	// this will release and set to nil
}


#pragma mark -
#pragma mark UITableViewDataSource

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
	return [self.dataSourceArray count];
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
	return [[self.dataSourceArray objectAtIndex: section] valueForKey:kSectionTitleKey];
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
	return 2;
}

// to determine specific row height for each cell, override this.
// In this example, each row is determined by its subviews that are embedded.
//
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
	return ([indexPath row] == 0) ? 50.0 : 38.0;
}

// to determine which UITableViewCell to be used on a given row.
//
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
	UITableViewCell *cell = nil;

	if ([indexPath row] == 0)
	{
		static NSString *kDisplayCell_ID = @"DisplayCellID";
		cell = [self.tableView dequeueReusableCellWithIdentifier:kDisplayCell_ID];
        if (cell == nil)
        {
			cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:kDisplayCell_ID] autorelease];
			cell.selectionStyle = UITableViewCellSelectionStyleNone;
		}
		else
		{
			// the cell is being recycled, remove old embedded controls
			UIView *viewToRemove = nil;
			viewToRemove = [cell.contentView viewWithTag:kViewTag];
			if (viewToRemove)
				[viewToRemove removeFromSuperview];
		}
		
		cell.textLabel.text = [[self.dataSourceArray objectAtIndex: indexPath.section] valueForKey:kLabelKey];
		
		UIControl *control = [[self.dataSourceArray objectAtIndex: indexPath.section] valueForKey:kViewKey];
		[cell.contentView addSubview:control];
	}
	else
	{
		static NSString *kSourceCellID = @"SourceCellID";
		cell = [self.tableView dequeueReusableCellWithIdentifier:kSourceCellID];
        if (cell == nil)
        {
			cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:kSourceCellID] autorelease];
			cell.selectionStyle = UITableViewCellSelectionStyleNone;
			
			cell.textLabel.opaque = NO;
            cell.textLabel.textAlignment = UITextAlignmentCenter;
            cell.textLabel.textColor = [UIColor grayColor];
			cell.textLabel.numberOfLines = 2;
			cell.textLabel.highlightedTextColor = [UIColor blackColor];
            cell.textLabel.font = [UIFont systemFontOfSize:12.0];	
        }
		
		cell.textLabel.text = [[self.dataSourceArray objectAtIndex: indexPath.section] valueForKey:kSourceKey];
	}

	return cell;
}

- (void)switchAction:(id)sender
{
	// NSLog(@"switchAction: value = %d", [sender isOn]);
}

- (void)pageAction:(id)sender
{
	// NSLog(@"pageAction: current page = %d", [sender currentPage]);
}

- (void)sliderAction:(id)sender
{
    // UISlider *slider = (UISlider *)sender;
    // NSLog(@"sliderAction: value = %f", [slider value]);
}

- (void)stepperAction:(id)sender
{
    // UIStepper *actualStepper = (UIStepper *)sender;
    // NSLog(@"stepperAction: value = %f", [actualStepper value]);
}


#pragma mark -
#pragma mark Lazy creation of controls

- (UISwitch *)switchCtl
{
    if (switchCtl == nil) 
    {
        CGRect frame = CGRectMake(198.0, 12.0, 94.0, 27.0);
        switchCtl = [[UISwitch alloc] initWithFrame:frame];
        [switchCtl addTarget:self action:@selector(switchAction:) forControlEvents:UIControlEventValueChanged];
        
        // in case the parent view draws with a custom color or gradient, use a transparent color
        switchCtl.backgroundColor = [UIColor clearColor];
		
		[switchCtl setAccessibilityLabel:NSLocalizedString(@"StandardSwitch", @"")];
		
		switchCtl.tag = kViewTag;	// tag this view for later so we can remove it from recycled table cells
    }
    return switchCtl;
}

- (UISlider *)sliderCtl
{
    if (sliderCtl == nil) 
    {
        CGRect frame = CGRectMake(174.0, 12.0, 120.0, kSliderHeight);
        sliderCtl = [[UISlider alloc] initWithFrame:frame];
        [sliderCtl addTarget:self action:@selector(sliderAction:) forControlEvents:UIControlEventValueChanged];
        
        // in case the parent view draws with a custom color or gradient, use a transparent color
        sliderCtl.backgroundColor = [UIColor clearColor];
        
        sliderCtl.minimumValue = 0.0;
        sliderCtl.maximumValue = 100.0;
        sliderCtl.continuous = YES;
        sliderCtl.value = 50.0;

		// Add an accessibility label that describes the slider.
		[sliderCtl setAccessibilityLabel:NSLocalizedString(@"StandardSlider", @"")];
		
		sliderCtl.tag = kViewTag;	// tag this view for later so we can remove it from recycled table cells
    }
    return sliderCtl;
}

- (UISlider *)customSlider
{
    if (customSlider == nil) 
    {
        CGRect frame = CGRectMake(174, 12.0, 120.0, kSliderHeight);
        customSlider = [[UISlider alloc] initWithFrame:frame];
        [customSlider addTarget:self action:@selector(sliderAction:) forControlEvents:UIControlEventValueChanged];
        // in case the parent view draws with a custom color or gradient, use a transparent color
        customSlider.backgroundColor = [UIColor clearColor];	
        UIImage *stetchLeftTrack = [[UIImage imageNamed:@"orangeslide.png"]
									stretchableImageWithLeftCapWidth:10.0 topCapHeight:0.0];
        UIImage *stetchRightTrack = [[UIImage imageNamed:@"yellowslide.png"]
									 stretchableImageWithLeftCapWidth:10.0 topCapHeight:0.0];
        [customSlider setThumbImage: [UIImage imageNamed:@"slider_ball.png"] forState:UIControlStateNormal];
        [customSlider setMinimumTrackImage:stetchLeftTrack forState:UIControlStateNormal];
        [customSlider setMaximumTrackImage:stetchRightTrack forState:UIControlStateNormal];
        customSlider.minimumValue = 0.0;
        customSlider.maximumValue = 100.0;
        customSlider.continuous = YES;
        customSlider.value = 50.0;
		
		// Add an accessibility label that describes the slider.
		[customSlider setAccessibilityLabel:NSLocalizedString(@"CustomSlider", @"")];
		
		customSlider.tag = kViewTag;	// tag this view for later so we can remove it from recycled table cells
    }
    return customSlider;
}

- (UIPageControl *)pageControl
{
    if (pageControl == nil) 
    {
        CGRect frame = CGRectMake(120.0, 14.0, 178.0, 20.0);
        pageControl = [[UIPageControl alloc] initWithFrame:frame];
        [pageControl addTarget:self action:@selector(pageAction:) forControlEvents:UIControlEventTouchUpInside];
		
        // in case the parent view draws with a custom color or gradient, use a transparent color
        pageControl.backgroundColor = [UIColor grayColor];
        
        pageControl.numberOfPages = 10;	// must be set or control won't draw
		
		pageControl.tag = kViewTag;	// tag this view for later so we can remove it from recycled table cells
    }
    return pageControl;
}

- (UIActivityIndicatorView *)progressInd
{
    if (progressInd == nil)
    {
        CGRect frame = CGRectMake(265.0, 12.0, kProgressIndicatorSize, kProgressIndicatorSize);
        
        progressInd = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];
        self.progressIndSavedColor = progressInd.color;
        progressInd.frame = frame;
        [progressInd startAnimating];
        progressInd.activityIndicatorViewStyle = UIActivityIndicatorViewStyleGray;
        [progressInd sizeToFit];
		
		progressInd.tag = kViewTag;	// tag this view for later so we can remove it from recycled table cells
    }
    return progressInd;
}

- (UIProgressView *)progressBar
{
    if (progressBar == nil) 
    {
        CGRect frame = CGRectMake(126.0, 20.0, kUIProgressBarWidth, kUIProgressBarHeight);
        progressBar = [[UIProgressView alloc] initWithFrame:frame];
        progressBar.progressViewStyle = UIProgressViewStyleDefault;
        progressBar.progress = 0.5;
		
		progressBar.tag = kViewTag;	// tag this view for later so we can remove it from recycled table cells
    }
    return progressBar;
}

- (UIStepper *)stepper
{
    if (stepper == nil && [UIStepper class])
    {
        CGRect frame = CGRectMake(200.0, 10.0, 0.0, 0.0);
        stepper = [[UIStepper alloc] initWithFrame:frame];
		[stepper sizeToFit];        // size the control to it's normal size
        
		stepper.tag = kViewTag;     // tag this view for later so we can remove it from recycled table cells
        stepper.value = 0;
        stepper.minimumValue = 0;
        stepper.maximumValue = 10;
        stepper.stepValue = 1;
        
        [stepper addTarget:self action:@selector(stepperAction:) forControlEvents:UIControlEventValueChanged];
    }
    return stepper;
}

- (void)tintAction:(id)sender
{
    UIColor *tintColor = (progressBar.progressTintColor != nil) ? nil : [UIColor blueColor];
                        
    progressBar.progressTintColor = tintColor;
    progressBar.trackTintColor = tintColor;
    sliderCtl.minimumTrackTintColor = tintColor;
    sliderCtl.thumbTintColor = tintColor;
    switchCtl.onTintColor = tintColor;
    
    UIColor *progressIndColor = (progressInd.color != progressIndSavedColor) ? self.progressIndSavedColor : [UIColor blueColor];
    progressInd.color = progressIndColor;
}

@end