buttonsviewcontroller.m

GLPaint example code from the iphone SDK

/*

File: ButtonsViewController.m
Abstract: The view controller for hosting the UIButton features of this sample.

Version: 1.7

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*/

#import "ButtonsViewController.h"
#import "Constants.h"
#import "DisplayCell.h"
#import "SourceCell.h"

@implementation ButtonsViewController

@synthesize myTableView;

enum ButtonTableSections
{
	kUIGrayButton_Section = 0,
	kUIImageButton_Section,
	kUIRoundRectButton_Section,

	kUIDetailDisclosureButton_Section,
	kUIInfoLightButton_Section,
	kUIInfoDarkButton_Section,
	kUIContactAddButton_Section
};

- (id)init
{
	self = [super init];
	if (self)
	{
		// this title will appear in the navigation bar
		self.title = NSLocalizedString(@"ButtonsTitle", @"");
	}
	return self;
}

- (void)dealloc
{
	[myTableView setDelegate:nil];
	[myTableView release];
	
	[grayButton release];
	[imageButton release];
	[roundedButtonType release];
	
	[detailDisclosureButtonType release];
	[infoLightButtonType release];
	[infoDarkButtonType release];
	[contactAddButtonType release];
	
	[super dealloc];
}

+ (UIButton *)buttonWithTitle:	(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.frame = frame;
	
	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;
}

#pragma mark
#pragma mark Gray Button
#pragma mark
- (void)createGrayButton
{	
	// create the UIButtons with various background images
	// white button:
	UIImage *buttonBackground = [UIImage imageNamed:@"whiteButton.png"];
	UIImage *buttonBackgroundPressed = [UIImage imageNamed:@"blueButton.png"];
	
	CGRect frame = CGRectMake(0.0, 0.0, kStdButtonWidth, kStdButtonHeight);
	
	grayButton = [ButtonsViewController buttonWithTitle:@"Gray"
								target:self
								selector:@selector(action:)
								frame:frame
								image:buttonBackground
								imagePressed:buttonBackgroundPressed
								darkTextColor:YES];
}

#pragma mark
#pragma mark Button with Image
#pragma mark
- (void)createImageButton
{	
	// 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(0.0, 0.0, kStdButtonWidth, kStdButtonHeight);
	
	imageButton = [ButtonsViewController buttonWithTitle:@""
								target:self
								selector:@selector(action:)
								frame:frame
								image:buttonBackground
								imagePressed:buttonBackgroundPressed
								darkTextColor:YES];
	
	[imageButton setImage:[UIImage imageNamed:@"UIButton_custom.png"] forState:UIControlStateNormal];
}

#pragma mark
#pragma mark UIButtonTypeRoundedRect
#pragma mark
- (void)createRoundedButton
{
	// create a UIButton (UIButtonTypeRoundedRect)
	roundedButtonType = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
	roundedButtonType.frame = CGRectMake(0.0, 0.0, kStdButtonWidth, kStdButtonHeight);
	[roundedButtonType setTitle:@"Rounded" forState:UIControlStateNormal];
	roundedButtonType.backgroundColor = [UIColor clearColor];
	[roundedButtonType addTarget:self action:@selector(action:) forControlEvents:UIControlEventTouchUpInside];
}

#pragma mark
#pragma mark UIButtonTypeDetailDisclosure
#pragma mark
- (void)createDetailDisclosureButton
{
	// create a UIButton (UIButtonTypeDetailDisclosure)
	detailDisclosureButtonType = [[UIButton buttonWithType:UIButtonTypeDetailDisclosure] retain];
	detailDisclosureButtonType.frame = CGRectMake(0.0, 0.0, 25.0, 25.0);
	[detailDisclosureButtonType setTitle:@"Detail Disclosure" forState:UIControlStateNormal];
	detailDisclosureButtonType.backgroundColor = [UIColor clearColor];
	[detailDisclosureButtonType addTarget:self action:@selector(action:) forControlEvents:UIControlEventTouchUpInside];
}

#pragma mark
#pragma mark UIButtonTypeInfoDark
#pragma mark
- (void)createInfoDarkButton
{
	// create a UIButton (UIButtonTypeInfoLight)
	infoDarkButtonType = [[UIButton buttonWithType:UIButtonTypeInfoDark] retain];
	infoDarkButtonType.frame = CGRectMake(0.0, 0.0, 25.0, 25.0);
	[infoDarkButtonType setTitle:@"Detail Disclosure" forState:UIControlStateNormal];
	infoDarkButtonType.backgroundColor = [UIColor clearColor];
	[infoDarkButtonType addTarget:self action:@selector(action:) forControlEvents:UIControlEventTouchUpInside];
}

#pragma mark
#pragma mark UIButtonTypeInfoLight
#pragma mark
- (void)createInfoLightButton
{
	// create a UIButton (UIButtonTypeInfoLight)
	infoLightButtonType = [[UIButton buttonWithType:UIButtonTypeInfoLight] retain];
	infoLightButtonType.frame = CGRectMake(0.0, 0.0, 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];
}

#pragma mark
#pragma mark UIButtonTypeContactAdd
#pragma mark
- (void)createContactAddButton
{
	// create a UIButton (UIButtonTypeContactAdd)
	contactAddButtonType = [[UIButton buttonWithType:UIButtonTypeContactAdd] retain];
	contactAddButtonType.frame = CGRectMake(0.0, 0.0, 25.0, 25.0);
	[contactAddButtonType setTitle:@"Detail Disclosure" forState:UIControlStateNormal];
	contactAddButtonType.backgroundColor = [UIColor clearColor];
	[contactAddButtonType addTarget:self action:@selector(action:) forControlEvents:UIControlEventTouchUpInside];
}

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

- (void)loadView
{
	// create and configure the table view
	myTableView = [[UITableView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame] style:UITableViewStyleGrouped];	
	myTableView.delegate = self;
	myTableView.dataSource = self;
	myTableView.autoresizesSubviews = YES;
	self.view = myTableView;
	
	// create all our UIButtons to be used in myTableView
	[self createGrayButton];
	[self createImageButton];
	[self createRoundedButton];
	
	[self createDetailDisclosureButton];
	[self createInfoLightButton];
	[self createInfoDarkButton];
	[self createContactAddButton];
}


#pragma mark - UITableView delegates

// if you want the entire table to just be re-orderable then just return UITableViewCellEditingStyleNone
//
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
	return UITableViewCellEditingStyleNone;
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
	return 7;
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
	NSString *title;
	switch (section)
	{
		case kUIGrayButton_Section:
		{
			title = @"UIButton";
			break;
		}
		case kUIImageButton_Section:
		{
			title = @"UIButton";
			break;
		}
		case kUIRoundRectButton_Section:
		{
			title = @"UIButtonTypeRoundedRect";
			break;
		}
		case kUIDetailDisclosureButton_Section:
		{
			title = @"UIButtonTypeDetailDisclosure";
			break;
		}
		case kUIInfoLightButton_Section:
		{
			title = @"UIButtonTypeInfoLight";
			break;
		}
		case kUIInfoDarkButton_Section:
		{
			title = @"UIButtonTypeInfoDark";
			break;
		}
		case kUIContactAddButton_Section:
		{
			title = @"UIButtonTypeContactAdd";
			break;
		}
	}
	return title;
}

- (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
// buy the its subviews that are embedded.
//
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
	CGFloat result;
	
	switch ([indexPath row])
	{
		case 0:
		{
			result = kUIRowHeight;
			break;
		}
		case 1:
		{
			result = kUIRowLabelHeight;
			break;
		}
	}

	return result;
}

// utility routine leveraged by 'cellForRowAtIndexPath' to determine which UITableViewCell to be used on a given row
//
- (UITableViewCell *)obtainTableCellForRow:(NSInteger)row
{
	UITableViewCell *cell = nil;

	if (row == 0)
		cell = [myTableView dequeueReusableCellWithIdentifier:kDisplayCell_ID];
	else if (row == 1)
		cell = [myTableView dequeueReusableCellWithIdentifier:kSourceCell_ID];
	
	if (cell == nil)
	{
		if (row == 0)
			cell = [[[DisplayCell alloc] initWithFrame:CGRectZero reuseIdentifier:kDisplayCell_ID] autorelease];
		else if (row == 1)
			cell = [[[SourceCell alloc] initWithFrame:CGRectZero reuseIdentifier:kSourceCell_ID] autorelease];
	}
	
	return cell;
}

// to determine which UITableViewCell to be used on a given row.
//
- (UITableViewCell *)tableView:(UITableView *)tableView 
								cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
	NSInteger row = [indexPath row];
	
	UITableViewCell *cell = [self obtainTableCellForRow:row];
	
	switch (indexPath.section)
	{
		case kUIGrayButton_Section:
		{
			if (row == 0)
			{
				// this cell hosts the gray button
				((DisplayCell *)cell).nameLabel.text = @"Background Image";
				((DisplayCell *)cell).view = grayButton;
			}
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"ButtonsViewController.m - createGrayButton";
			}
			break;
		}
		
		case kUIImageButton_Section:
		{
			if (row == 0)
			{
				// this cell hosts the button with image
				((DisplayCell *)cell).nameLabel.text = @"Button with Image";
				((DisplayCell *)cell).view = imageButton;
			}
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"ButtonsViewController.m - createImageButton";
			}
			break;
		}
		
		case kUIRoundRectButton_Section:
		{
			if (row == 0)
			{
				// this cell hosts the rounded button
				((DisplayCell *)cell).nameLabel.text = @"Rounded Button";
				((DisplayCell *)cell).view = roundedButtonType;
			}
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"ButtonsViewController.m - createRoundedButton";
			}
			break;
		}

		case kUIDetailDisclosureButton_Section:
		{
			if (row == 0)
			{
				// this cell hosts the rounded button
				((DisplayCell *)cell).nameLabel.text = @"Detail Disclosure";
				((DisplayCell *)cell).view = detailDisclosureButtonType;
			}
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"ButtonsViewController.m - createDetailDisclosureButton";
			}
			break;
		}
			
		case kUIInfoLightButton_Section:
		{
			if (row == 0)
			{
				// this cell hosts the rounded button
				((DisplayCell *)cell).nameLabel.text = @"Info Light";
				((DisplayCell *)cell).view = infoLightButtonType;
			}
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"ButtonsViewController.m - createInfoLightButton";
			}
			break;
		}
		
		case kUIInfoDarkButton_Section:
		{
			if (row == 0)
			{
				// this cell hosts the rounded button
				((DisplayCell *)cell).nameLabel.text = @"Info Dark";
				((DisplayCell *)cell).view = infoDarkButtonType;
			}
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"ButtonsViewController.m - createInfoDarkButton";
			}
			break;
		}
			
		case kUIContactAddButton_Section:
		{
			if (row == 0)
			{
				// this cell hosts the rounded button
				((DisplayCell *)cell).nameLabel.text = @"Contact Add";
				((DisplayCell *)cell).view = contactAddButtonType;
			}
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"ButtonsViewController.m - createContactAddButton";
			}
			break;
		}		
	}
	
	return cell;
}

@end