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MenuViewController.m
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MenuViewController.m
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//
// MenuViewController.m
// SidePanel
//
// Created by Kevin Tatroe
// Copyright (c) 2012 Kevin Tatroe. All rights reserved.
//
// Based on code by Nick Harris, (c) 2012 Sepia Labs.
//
#import <QuartzCore/QuartzCore.h>
#import "SidePanelAppDelegate.h"
#import "MenuViewController.h"
#import "PanelAViewController.h"
#import "PanelBViewController.h"
#define CONTENT_TYPE_ROW_HEIGHT (float) 44.0
#define CONTENT_TYPE_PANEL_A_INDEX 0
#define CONTENT_TYPE_PANEL_B_INDEX 1
@implementation MenuViewController
@synthesize contentTableView;
@synthesize screenShotImageView;
@synthesize screenShotImage;
@synthesize tapGesture;
@synthesize panGesture;
- (id) initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle*)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self)
{
// Custom initialization
}
return self;
}
- (void) didReceiveMemoryWarning
{
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - View lifecycle
- (void) viewDidLoad
{
[super viewDidLoad];
// create a UITapGestureRecognizer to detect when the screenshot recieves a single tap
tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(singleTapScreenShot:)];
[screenShotImageView addGestureRecognizer:tapGesture];
// create a UIPanGestureRecognizer to detect when the screenshot is touched and dragged
panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGestureMoveAround:)];
[panGesture setMaximumNumberOfTouches:2];
[panGesture setDelegate:self];
[screenShotImageView addGestureRecognizer:panGesture];
appDelegate.menuViewController = self;
}
- (void) viewDidUnload
{
[super viewDidUnload];
// remove the gesture recognizers
[self.screenShotImageView removeGestureRecognizer:self.tapGesture];
[self.screenShotImageView removeGestureRecognizer:self.panGesture];
}
- (void) viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
// when the menu view appears, it will create the illusion that the other view has slide to the side
// what its actually doing is sliding the screenShotImage passed in off to the side
// to start this, we always want the image to be the entire screen, so set it there
[screenShotImageView setImage:self.screenShotImage];
[screenShotImageView setFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
// now we'll animate it across to the right over 0.2 seconds with an Ease In and Out curve
// this uses blocks to do the animation. Inside the block the frame of the UIImageView has its
// x value changed to where it will end up with the animation is complete.
// this animation doesn't require any action when completed so the block is left empty
[UIView animateWithDuration:0.2 delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
[screenShotImageView setFrame:CGRectMake(265, 0, self.view.frame.size.width, self.view.frame.size.height)];
} completion:nil];
}
- (void) prepareForSegue:(UIStoryboardSegue*)segue sender:(id)sender
{
appDelegate.contentViewController = segue.destinationViewController;
}
- (void) slideThenHide
{
// this animates the screenshot back to the left before telling the app delegate to swap out the MenuViewController
// it tells the app delegate using the completion block of the animation
[UIView animateWithDuration:0.15 delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
[screenShotImageView setFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
} completion:^(BOOL finished) {
[appDelegate hideSideMenu];
}];
}
- (BOOL) shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
- (IBAction) showPanelAViewController
{
[self slideThenHide];
[self performSegueWithIdentifier:@"toPanelA" sender:self];
}
- (IBAction) showPanelBViewController
{
[self slideThenHide];
[self performSegueWithIdentifier:@"toPanelB" sender:self];
}
- (void) singleTapScreenShot:(UITapGestureRecognizer*)gestureRecognizer
{
// on a single tap of the screenshot, assume the user is done viewing the menu
// and call the slideThenHide function
[self slideThenHide];
if ([appDelegate.contentViewController isKindOfClass:[PanelAViewController class]]) {
[self performSegueWithIdentifier:@"toPanelA" sender:self];
}
else {
[self performSegueWithIdentifier:@"toPanelB" sender:self];
}
}
- (void) panGestureMoveAround:(UIPanGestureRecognizer*)gesture;
{
UIView* piece = [gesture view];
[self adjustAnchorPointForGestureRecognizer:gesture];
if ([gesture state] == UIGestureRecognizerStateBegan || [gesture state] == UIGestureRecognizerStateChanged) {
CGPoint translation = [gesture translationInView:[piece superview]];
[piece setCenter:CGPointMake([piece center].x + translation.x, [piece center].y)];
[gesture setTranslation:CGPointZero inView:[piece superview]];
}
else if ([gesture state] == UIGestureRecognizerStateEnded) {
[self slideThenHide];
if ([appDelegate.contentViewController isKindOfClass:[PanelAViewController class]]) {
[self performSegueWithIdentifier:@"toPanelA" sender:self];
}
else {
[self performSegueWithIdentifier:@"toPanelB" sender:self];
}
}
}
- (void) adjustAnchorPointForGestureRecognizer:(UIGestureRecognizer*)gestureRecognizer
{
if (gestureRecognizer.state == UIGestureRecognizerStateBegan) {
UIView *piece = gestureRecognizer.view;
CGPoint locationInView = [gestureRecognizer locationInView:piece];
CGPoint locationInSuperview = [gestureRecognizer locationInView:piece.superview];
piece.layer.anchorPoint = CGPointMake(locationInView.x / piece.bounds.size.width, locationInView.y / piece.bounds.size.height);
piece.center = locationInSuperview;
}
}
#pragma mark - UITableViewDataSource
- (UIView*) tableView:(UITableView*)tableView viewForHeaderInSection:(NSInteger)section
{
return nil;
}
- (float) tableView:(UITableView*)tableView heightForHeaderInSection:(NSInteger)section
{
return 0;
}
- (NSInteger) numberOfSectionsInTableView:(UITableView*)tableView
{
return 1;
}
- (NSInteger) tableView:(UITableView*)tableView numberOfRowsInSection:(NSInteger)section
{
return 2;
}
- (float) tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
return CONTENT_TYPE_ROW_HEIGHT;
}
- (UITableViewCell*) tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath
{
static NSString* sContentTypeCellIdentifier = @"ContentTypeTableCell";
UITableViewCell* cell = [tableView dequeueReusableCellWithIdentifier:sContentTypeCellIdentifier];
NSArray* titles = [NSArray arrayWithObjects:@"Panel A", @"Panel B", nil];
cell.textLabel.text = NSLocalizedString([titles objectAtIndex:indexPath.row], nil);
return cell;
}
- (void) tableView:(UITableView*)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath
{
[self.contentTableView deselectRowAtIndexPath:indexPath animated:YES];
if (indexPath.row == CONTENT_TYPE_PANEL_A_INDEX) {
[self showPanelAViewController];
}
else if (indexPath.row == CONTENT_TYPE_PANEL_B_INDEX) {
[self showPanelBViewController];
}
}
@end