/UICatalog/ButtonsViewController.m

/*
     File: ButtonsViewController.m 
 Abstract: The table view controller for hosting the UIButton features of this sample. 
  Version: 2.10 
  
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 */

#import "ButtonsViewController.h"
#import "Constants.h"

#define kStdButtonWidth		106.0
#define kStdButtonHeight	40.0

#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 -

@implementation ButtonsViewController

@synthesize dataSourceArray;

@synthesize grayButton, imageButton, roundedButtonType, detailDisclosureButtonType, infoLightButtonType, infoDarkButtonType, contactAddButtonType;

- (void)dealloc
{
	[grayButton release];
	[imageButton release];
	[roundedButtonType release];
	
	[detailDisclosureButtonType release];
	[infoLightButtonType release];
	[infoDarkButtonType release];
	[contactAddButtonType release];
	
	[dataSourceArray release];
	
	[super dealloc];
}

- (void)viewDidLoad
{
	[super viewDidLoad];
	
	self.title = NSLocalizedString(@"ButtonsTitle", @"");
	
	self.dataSourceArray = [NSArray arrayWithObjects:
									[NSDictionary dictionaryWithObjectsAndKeys:
										@"UIButton", kSectionTitleKey,
										@"Background Image", kLabelKey,
										@"ButtonsViewController.m:\r(UIButton *)grayButton", kSourceKey,
										self.grayButton, kViewKey,
									  nil],
								
									[NSDictionary dictionaryWithObjectsAndKeys:
										@"UIButton", kSectionTitleKey,
										@"Button with Image", kLabelKey,
										@"ButtonsViewController.m:\r(UIButton *)imageButton", kSourceKey,
										self.imageButton, kViewKey,
									 nil],
								
									[NSDictionary dictionaryWithObjectsAndKeys:
										@"UIButtonTypeRoundedRect", kSectionTitleKey,
										@"Rounded Button", kLabelKey,
										@"ButtonsViewController.m:\r(UIButton *)roundedButtonType", kSourceKey,
										self.roundedButtonType, kViewKey,
									 nil],
									
									[NSDictionary dictionaryWithObjectsAndKeys:
										@"UIButtonTypeDetailDisclosure", kSectionTitleKey,
										@"Detail Disclosure", kLabelKey,
										@"ButtonsViewController.m:\r(UIButton *)detailDisclosureButton", kSourceKey,
										self.detailDisclosureButtonType, kViewKey,
									 nil],
									
									[NSDictionary dictionaryWithObjectsAndKeys:
										@"UIButtonTypeInfoLight", kSectionTitleKey,
										@"Info Light", kLabelKey,
										@"ButtonsViewController.m:\r(UIButton *)infoLightButtonType", kSourceKey,
										self.infoLightButtonType, kViewKey,
									 nil],
								
									[NSDictionary dictionaryWithObjectsAndKeys:
										@"UIButtonTypeInfoDark", kSectionTitleKey,
										@"Info Dark", kLabelKey,
										@"ButtonsViewController.m:\r(UIButton *)infoDarkButtonType", kSourceKey,
										self.infoDarkButtonType, kViewKey,
									 nil],
									
									[NSDictionary dictionaryWithObjectsAndKeys:
										@"UIButtonTypeContactAdd", kSectionTitleKey,
										@"Contact Add", kLabelKey,
										@"ButtonsViewController.m:\r(UIButton *)contactAddButtonType", kSourceKey,
										self.contactAddButtonType, kViewKey,
									 nil],
								nil];
}

// 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
	//
	[grayButton release];
	grayButton = nil;
	[imageButton release];
	imageButton = nil;
	[roundedButtonType release];
	roundedButtonType = nil;
	[detailDisclosureButtonType release];
	detailDisclosureButtonType = nil;
	[infoLightButtonType release];
	infoLightButtonType = nil;
	[infoDarkButtonType release];
	infoDarkButtonType = nil;
	[contactAddButtonType release];
	contactAddButtonType = nil;
	
	self.dataSourceArray = 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];
		
		UIButton *button = [[self.dataSourceArray objectAtIndex: indexPath.section] valueForKey:kViewKey];
		[cell.contentView addSubview:button];
	}
	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;
}


#pragma mark -

+ (UIButton *)newButtonWithTitle:(NSString *)title
					   target:(id)target
					 selector:(SEL)selector
						frame:(CGRect)frame
						image:(UIImage *)image
				 imagePressed:(UIImage *)imagePressed
				darkTextColor:(BOOL)darkTextColor
{	
	UIButton *button = [[UIButton alloc] initWithFrame:frame];
	// or you can do this:
	//		UIButton *button = [[UIButton buttonWithType:UIButtonTypeCustom] retain];
	
	button.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
	button.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;
	
	[button setTitle:title forState:UIControlStateNormal];	
	if (darkTextColor)
	{
		[button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
	}
	else
	{
		[button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
	}
	
	UIImage *newImage = [image stretchableImageWithLeftCapWidth:12.0 topCapHeight:0.0];
	[button setBackgroundImage:newImage forState:UIControlStateNormal];
	
	UIImage *newPressedImage = [imagePressed stretchableImageWithLeftCapWidth:12.0 topCapHeight:0.0];
	[button setBackgroundImage:newPressedImage forState:UIControlStateHighlighted];
	
	[button addTarget:target action:selector forControlEvents:UIControlEventTouchUpInside];
	
    // in case the parent view draws with a custom color or gradient, use a transparent color
	button.backgroundColor = [UIColor clearColor];
	
	return button;
}

- (void)action:(id)sender
{
	//NSLog(@"UIButton was clicked");
}

#pragma mark -
#pragma mark Lazy creation of buttons

- (UIButton *)grayButton
{	
	if (grayButton == nil)
	{
		// create the UIButtons with various background images
		// white button:
		UIImage *buttonBackground = [UIImage imageNamed:@"whiteButton.png"];
		UIImage *buttonBackgroundPressed = [UIImage imageNamed:@"blueButton.png"];
		
		CGRect frame = CGRectMake(182.0, 5.0, kStdButtonWidth, kStdButtonHeight);
		
		grayButton = [ButtonsViewController newButtonWithTitle:@"Gray"
													 target:self
												   selector:@selector(action:)
													  frame:frame
													  image:buttonBackground
											   imagePressed:buttonBackgroundPressed
											  darkTextColor:YES];
		
		grayButton.tag = kViewTag;	// tag this view for later so we can remove it from recycled table cells
	}
	return grayButton;
}

- (UIButton *)imageButton
{	
	if (imageButton == nil)
	{
		// create a UIButton with just an image instead of a title
		
		UIImage *buttonBackground = [UIImage imageNamed:@"whiteButton.png"];
		UIImage *buttonBackgroundPressed = [UIImage imageNamed:@"blueButton.png"];
		
		CGRect frame = CGRectMake(182.0, 5.0, kStdButtonWidth, kStdButtonHeight);
		
		imageButton = [ButtonsViewController newButtonWithTitle:@""
													  target:self
													selector:@selector(action:)
													   frame:frame
													   image:buttonBackground
												imagePressed:buttonBackgroundPressed
											   darkTextColor:YES];
		
		[imageButton setImage:[UIImage imageNamed:@"UIButton_custom.png"] forState:UIControlStateNormal];
		
		// Add an accessibility label to the image.
		[imageButton setAccessibilityLabel:NSLocalizedString(@"ArrowButton", @"")];
		
		imageButton.tag = kViewTag;	// tag this view for later so we can remove it from recycled table cells
	}
	return imageButton;
}

- (UIButton *)roundedButtonType
{
	if (roundedButtonType == nil)
	{
		// create a UIButton (UIButtonTypeRoundedRect)
		roundedButtonType = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
		roundedButtonType.frame = CGRectMake(182.0, 5.0, kStdButtonWidth, kStdButtonHeight);
		[roundedButtonType setTitle:@"Rounded" forState:UIControlStateNormal];
		roundedButtonType.backgroundColor = [UIColor clearColor];
		[roundedButtonType addTarget:self action:@selector(action:) forControlEvents:UIControlEventTouchUpInside];
		
		roundedButtonType.tag = kViewTag;	// tag this view for later so we can remove it from recycled table cells
	}
	return roundedButtonType;
}

- (UIButton *)detailDisclosureButtonType
{
	if (detailDisclosureButtonType == nil)
	{
		// create a UIButton (UIButtonTypeDetailDisclosure)
		detailDisclosureButtonType = [[UIButton buttonWithType:UIButtonTypeDetailDisclosure] retain];
		detailDisclosureButtonType.frame = CGRectMake(250.0, 8.0, 25.0, 25.0);
		[detailDisclosureButtonType setTitle:@"Detail Disclosure" forState:UIControlStateNormal];
		detailDisclosureButtonType.backgroundColor = [UIColor clearColor];
		[detailDisclosureButtonType addTarget:self action:@selector(action:) forControlEvents:UIControlEventTouchUpInside];
		
		// Add a custom accessibility label to the button because it has no associated text.
		[detailDisclosureButtonType setAccessibilityLabel:NSLocalizedString(@"MoreInfoButton", @"")];

		detailDisclosureButtonType.tag = kViewTag;	// tag this view for later so we can remove it from recycled table cells
	}
	return detailDisclosureButtonType;
}

- (UIButton *)infoDarkButtonType
{
	if (infoDarkButtonType == nil)
	{
		// create a UIButton (UIButtonTypeInfoLight)
		infoDarkButtonType = [[UIButton buttonWithType:UIButtonTypeInfoDark] retain];
		infoDarkButtonType.frame = CGRectMake(250.0, 8.0, 25.0, 25.0);
		[infoDarkButtonType setTitle:@"Detail Disclosure" forState:UIControlStateNormal];
		infoDarkButtonType.backgroundColor = [UIColor clearColor];
		[infoDarkButtonType addTarget:self action:@selector(action:) forControlEvents:UIControlEventTouchUpInside];
		
		// Add a custom accessibility label to the button because it has no associated text.
		[infoDarkButtonType setAccessibilityLabel:NSLocalizedString(@"MoreInfoButton", @"")];

		infoDarkButtonType.tag = kViewTag;	// tag this view for later so we can remove it from recycled table cells
	}
	return infoDarkButtonType;
}

- (UIButton *)infoLightButtonType
{
	if (infoLightButtonType == nil)
	{
		// create a UIButton (UIButtonTypeInfoLight)
		infoLightButtonType = [[UIButton buttonWithType:UIButtonTypeInfoLight] retain];
		infoLightButtonType.frame = CGRectMake(250.0, 8.0, 25.0, 25.0);
		[infoLightButtonType setTitle:@"Detail Disclosure" forState:UIControlStateNormal];
		infoLightButtonType.backgroundColor = [UIColor clearColor];
		[infoLightButtonType addTarget:self action:@selector(action:) forControlEvents:UIControlEventTouchUpInside];
		infoLightButtonType.backgroundColor = [UIColor grayColor];
		
		// Add a custom accessibility label to the button because it has no associated text.
		[infoLightButtonType setAccessibilityLabel:NSLocalizedString(@"MoreInfoButton", @"")];

		infoLightButtonType.tag = kViewTag;	// tag this view for later so we can remove it from recycled table cells
	}
	
	return infoLightButtonType;
}

- (UIButton *)contactAddButtonType
{
	if (contactAddButtonType == nil)
	{
		// create a UIButton (UIButtonTypeContactAdd)
		contactAddButtonType = [[UIButton buttonWithType:UIButtonTypeContactAdd] retain];
		contactAddButtonType.frame = CGRectMake(250.0, 8.0, 25.0, 25.0);
		[contactAddButtonType setTitle:@"Detail Disclosure" forState:UIControlStateNormal];
		contactAddButtonType.backgroundColor = [UIColor clearColor];
		[contactAddButtonType addTarget:self action:@selector(action:) forControlEvents:UIControlEventTouchUpInside];
		
		// Add a custom accessibility label to the button because it has no associated text.
		[contactAddButtonType setAccessibilityLabel:NSLocalizedString(@"AddContactButton", @"")];
		
		contactAddButtonType.tag = kViewTag;	// tag this view for later so we can remove it from recycled table cells
	}
	return contactAddButtonType;
}

@end