//

// ViewController.m

// CYRTextViewExample

//

// Created by Illya Busigin on 1/5/14.

// Copyright (c) 2014 Cyrillian, Inc. All rights reserved.

//

#import "ViewController.h"

#import "QEDTextView.h"

@interface ViewController () <UITextViewDelegate>

@property (nonatomic, strong) QEDTextView *textView;

@end

@implementation ViewController

#pragma mark - View Lifecycle

- (void)viewDidLoad

{

[super viewDidLoad];

self.navigationItem.title = @"CYRTextView";

self.view.backgroundColor = [UIColor whiteColor];

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];

QEDTextView *textView = [[QEDTextView alloc] initWithFrame:self.view.bounds];

textView.autoresizingMask = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;

textView.delegate = self;

self.textView = textView;

[self.view addSubview:textView];

self.textView.text = @"// Test comment\n\n"\

@"// Let's solve our first equation\n"\

@"x = 1 / (1 + x) // equation to solve for x\n"\

@"x > 0 // restrict to positive root\n\n"\

@"// Let's create a user function\n"\

@"// The standard function random returns a random value between 0 an 1\n"\

@"g(x) := 0.005 * (x + 1) * (x - 1) + 0.1 * (random - 0.5)\n\n"\

@"// Now let's plot the two functions together on one chart\n"\

@"plot f(x), g(x)";

}

#pragma mark - Notification Handlers

- (void)keyboardWillShow:(NSNotification*)aNotification

{

UIBarButtonItem *dismissButton = [[UIBarButtonItem alloc] initWithTitle:@"Dismiss" style:UIBarButtonItemStyleDone target:self action:@selector(dismissKeyboard)];

[self.navigationItem setRightBarButtonItem:dismissButton animated:YES];

[self moveTextViewForKeyboard:aNotification up:YES];

}

- (void)keyboardWillHide:(NSNotification*)aNotification

{

self.navigationItem.rightBarButtonItem = nil;

[self moveTextViewForKeyboard:aNotification up:NO];

}

#pragma mark - Convenience

- (void)moveTextViewForKeyboard:(NSNotification*)aNotification up:(BOOL)up

{

NSDictionary* userInfo = [aNotification userInfo];

NSTimeInterval animationDuration;

UIViewAnimationCurve animationCurve;

CGRect keyboardEndFrame;

[[userInfo objectForKey:UIKeyboardAnimationCurveUserInfoKey] getValue:&animationCurve];

[[userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] getValue:&animationDuration];

[[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] getValue:&keyboardEndFrame];

[UIView beginAnimations:nil context:nil];

[UIView setAnimationDuration:animationDuration];

[UIView setAnimationCurve:animationCurve];

CGRect newFrame = _textView.frame;

CGRect keyboardFrame = [self.view convertRect:keyboardEndFrame toView:nil];

newFrame.size.height -= keyboardFrame.size.height * (up?1:-1);

_textView.frame = newFrame;

[UIView commitAnimations];

}

- (void)dismissKeyboard

{

[_textView resignFirstResponder];

}

@end