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SKHelpViewerVC.m
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SKHelpViewerVC.m
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//
// SKHelpViewerVC.m
//
// Created by Raheel Ahmad on 11/4/11.
// Copyright (c) 2011 Sakun Labs. All rights reserved.
//
#import "SKHelpViewerVC.h"
// private labels
@interface SKHelpViewerVC ()
@property (nonatomic, strong) UIWebView *messageWebView;
@property (nonatomic, strong) UILabel *titleLabel;
@property (nonatomic, strong) UIView *labelsView; // used for the two labels
@property (nonatomic, strong) UIView *transparentView; // used to dim the background (parentVC's view)
- (void) setupViewFrames;
@end
@implementation SKHelpViewerVC
@synthesize parentVC;
@synthesize heightRatioOfParent;
@synthesize messageTitle;
@synthesize helpMessage;
@synthesize titleLabel;
@synthesize messageWebView;
@synthesize labelsView;
@synthesize transparentView;
@synthesize showing;
@synthesize messageFont;
@synthesize titleFont;
@synthesize backgroundColor;
#pragma mark - Event handlers
- (void) show {
self.labelsView.frame = hiddenLabelsViewFrame;
self.transparentView.alpha = 0.0f;
if (!self.view.superview) {
[self.parentVC.view addSubview:self.view];
}
[UIView animateWithDuration:0.3f animations:^{
self.transparentView.alpha = 0.5f;
self.labelsView.frame = labelsViewFrame;
} completion:^(BOOL finished) {
self.showing = YES;
}];
}
- (void) hide {
[UIView animateWithDuration:0.3f animations:^{
self.labelsView.frame = hiddenLabelsViewFrame;
self.transparentView.alpha = 0.0f;
} completion:^(BOOL finished) {
[self.view removeFromSuperview];
self.showing = NO;
}];
}
#pragma mark - Helpers
- (void) setupViewFrames {
float h = self.parentVC.view.bounds.size.height * heightRatio;
labelsViewFrame = CGRectMake(0, viewFrame.size.height - h, viewFrame.size.width, h);
hiddenLabelsViewFrame = CGRectOffset(labelsViewFrame, 0, labelsViewFrame.size.height);
float xBuffer = labelsViewFrame.size.width/8;
float yBuffer = 10;
if (xBuffer > 10)
xBuffer = 10;
titleRect = CGRectMake(xBuffer, yBuffer, labelsViewFrame.size.width - 2 * xBuffer, 20);
messageRect = CGRectMake(xBuffer, 20 + yBuffer, labelsViewFrame.size.width - 2 * xBuffer, labelsViewFrame.size.height - 20 - yBuffer);
self.labelsView.frame = hiddenLabelsViewFrame;
self.messageWebView.frame = messageRect;
self.titleLabel.frame = titleRect;
}
#pragma mark - Setters
- (void) setBackgroundColor:(UIColor *) newColor {
backgroundColor = newColor;
self.labelsView.backgroundColor = newColor;
}
- (UIColor *) backgroundColor {
return backgroundColor;
}
- (void) setHeightRatioOfParent:(float) newRatio {
// setup the backingView. This will be where the labels are added and will only take part of the full view's height
if (newRatio <= 0)
newRatio = 0.65;
// if a 0.55 height ratio gives us managable height, let's use that
float proposedHeight = viewFrame.size.height * newRatio;
if (proposedHeight >= 100)
heightRatio = newRatio;
else
heightRatio = viewFrame.size.height / 80;
[self setupViewFrames];
}
- (void) setMessageTitle:(NSString *) newTitle {
messageTitle = newTitle;
titleLabel.text = messageTitle;
}
- (void) setHelpMessage:(NSString *) newMessage {
helpMessage = newMessage;
NSString *messageHTMLString = [NSString stringWithFormat:@"<body style='background-color:transparent'><span style='font-family: %@; font-size: %f pt'> %@ </span></body>", self.messageFont.fontName, self.messageFont.pointSize, newMessage];
[self.messageWebView loadHTMLString:messageHTMLString baseURL:nil];
}
- (void) setMessageFont:(UIFont *) newFont {
messageFont = newFont;
[self setHelpMessage:self.helpMessage]; // so as to refresh the font
}
- (void) setTitleFont:(UIFont *) newFont {
titleFont = newFont;
titleLabel.font = titleFont;
}
- (CGFloat) heightRatioOfParent {
return heightRatio;
}
#pragma mark - Basics
- (id)initWithParentVC: (UIViewController *) prntVC message:(NSString *)msg andTitle:(NSString *)ttl
{
self = [super init];
if (self) {
parentVC = prntVC;
messageTitle = ttl;
helpMessage = msg;
// set some defaults
viewFrame = parentVC.view.frame;
heightRatio = 0.65;
messageFont = [UIFont fontWithName:@"Cochin" size:13];
titleFont = [UIFont fontWithName:@"GillSans-Bold" size:20];
[self setupViewFrames];
}
return self;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
#pragma mark - View lifecycle
- (void)loadView
{
self.view = [[UIView alloc] initWithFrame:viewFrame];
self.view.backgroundColor = [UIColor clearColor];
self.transparentView = [[UIView alloc] initWithFrame:viewFrame];
self.transparentView.backgroundColor = [UIColor darkGrayColor];
self.transparentView.alpha = 0.0f;
[transparentView addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hide)]];
[self.view addSubview:self.transparentView];
if (!self.backgroundColor)
self.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"helpBackground.png"]];
self.labelsView = [[UIView alloc] initWithFrame:hiddenLabelsViewFrame];
self.labelsView.backgroundColor = self.backgroundColor;
[self.view addSubview:self.labelsView];
self.messageWebView = [[UIWebView alloc] initWithFrame:messageRect];
self.messageWebView.opaque = NO;
self.messageWebView.backgroundColor = [UIColor clearColor];
// get rid of web view's "shadow" when scrolling; just an image view...
for (UIView* subView in [self.messageWebView subviews]) {
if ([subView isKindOfClass:[UIScrollView class]]) {
for (UIView* shadowView in [subView subviews])
if ([shadowView isKindOfClass:[UIImageView class]])
[shadowView setHidden:YES];
}
}
[self setHelpMessage:helpMessage];
[self.labelsView addSubview:self.messageWebView];
self.titleLabel = [[UILabel alloc] initWithFrame:titleRect];
titleLabel.backgroundColor = [UIColor clearColor];
titleLabel.font = self.titleFont;
titleLabel.text = messageTitle;
[self.labelsView addSubview:titleLabel];
self.showing = NO;
}
- (void)viewDidUnload
{
[super viewDidUnload];
self.labelsView = nil;
self.transparentView = nil;
self.titleLabel = nil;
self.messageWebView = nil;
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return YES;
}
@end