/*

Copyright (C) 2017 Apple Inc. All Rights Reserved.

See LICENSE.txt for this sample’s licensing information

Abstract:

The app's view controller which presents viewable content.

*/

#import "DataViewController.h"

#import "PDFView.h"

#import "TiledPDFScrollView.h"

#import "TiledPDFView.h"

@implementation DataViewController

- (void)dealloc

{

    if ( self.page != NULL )

    {

        CGPDFPageRelease( self.page );

    }

}

- (void)viewDidLoad

{

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    self.page = CGPDFDocumentGetPage( self.pdf, self.pageNumber );

    if ( self.page != NULL ) CGPDFPageRetain( self.page );

    [self.scrollView setPDFPage:self.page];

    // Disable zooming if our pages are currently shown in landscape for new views

    [self.scrollView setUserInteractionEnabled:UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation)];

}

- (void)viewDidLayoutSubviews

{

    [self restoreScale];

}

- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id <UIViewControllerTransitionCoordinator>)coordinator

{

    [super viewWillTransitionToSize:size withTransitionCoordinator:coordinator];

    [coordinator

     animateAlongsideTransition:nil

     completion:^(id<UIViewControllerTransitionCoordinatorContext> context) {

         // Disable zooming if our pages are currently shown in landscape after orientation changes

         [self.scrollView setUserInteractionEnabled:UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation)];

    }];

}

- (void)restoreScale

{

    // Called on orientation change.

    // We need to zoom out and basically reset the scrollview to look right in two-page spline view.

    CGRect pageRect = CGPDFPageGetBoxRect( self.page, kCGPDFMediaBox );

    CGFloat yScale = self.view.frame.size.height / pageRect.size.height;

    CGFloat xScale = self.view.frame.size.width / pageRect.size.width;

    self.myScale = MIN( xScale, yScale );

    self.scrollView.bounds = self.view.bounds;

    self.scrollView.zoomScale = 1.0;

    self.scrollView.PDFScale = self.myScale;

    self.scrollView.tiledPDFView.bounds = self.view.bounds;

    self.scrollView.tiledPDFView.myScale = self.myScale;

    [self.scrollView.tiledPDFView.layer setNeedsDisplay];

}

@end