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//
// HBPreviewViewController.m
// HandBrake
//
// Created by Damiano Galassi on 14/12/2017.
//
#import <QuartzCore/QuartzCore.h>
#import "HBPreviewViewController.h"
#import "HBPreviewView.h"
#import "HBPreviewGenerator.h"
#import "HBPreviewController.h"
@interface HBPreviewViewController ()
@property (nonatomic, strong) IBOutlet HBPreviewView *previewView;
@property (nonatomic, strong) IBOutlet NSView *hud;
@property (nonatomic) NSInteger selectedIndex;
@property (nonatomic) BOOL visible;
@property (nonatomic) NSTimer *hudTimer;
@property (nonatomic) BOOL mouseInView;
@end
@implementation HBPreviewViewController
- (instancetype)init
{
self = [super initWithNibName:@"HBPreviewViewController" bundle:nil];
if (self)
{
_selectedIndex = 1;
}
return self;
}
- (void)loadView
{
[super loadView];
self.visible = YES;
self.previewView.showShadow = NO;
NSTrackingArea *trackingArea = [[NSTrackingArea alloc] initWithRect:self.view.frame
options:NSTrackingMouseEnteredAndExited | NSTrackingMouseMoved | NSTrackingInVisibleRect | NSTrackingActiveAlways
owner:self
userInfo:nil];
[self.view addTrackingArea:trackingArea];
self.hud.hidden = YES;
self.hud.layer.opacity = 0;
}
- (void)viewWillAppear
{
self.visible = YES;
[self updatePicture];
}
- (void)viewDidDisappear
{
self.visible = NO;
}
- (void)setGenerator:(HBPreviewGenerator *)generator
{
_generator = generator;
if (generator)
{
self.selectedIndex = self.selectedIndex;
[self updatePicture];
}
else
{
self.previewView.image = nil;
}
}
- (void)update
{
[self updatePicture];
}
#pragma MARK: - HUD
- (void)mouseEntered:(NSEvent *)theEvent
{
if (self.generator)
{
[self showHudWithAnimation:self.hud];
}
self.mouseInView = YES;
}
- (void)mouseMoved:(NSEvent *)theEvent
{
[super mouseMoved:theEvent];
// Test for mouse location to show/hide hud controls
if (self.generator && self.mouseInView)
{
[self showHudWithAnimation:self.hud];
}
}
- (void)mouseExited:(NSEvent *)theEvent
{
[self hideHudWithAnimation:self.hud];
self.mouseInView = NO;
}
#define ANIMATION_DUR 0.15
- (void)showHudWithAnimation:(NSView *)hud
{
// The standard view animator doesn't play
// nicely with the Yosemite visual effects yet.
// So let's do the fade ourself.
if (hud.layer.opacity == 0 || hud.isHidden)
{
hud.hidden = NO;
[CATransaction begin];
CABasicAnimation *fadeInAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];
fadeInAnimation.fromValue = @(hud.layer.presentationLayer.opacity);
fadeInAnimation.toValue = @(1.0);
fadeInAnimation.beginTime = 0.0;
fadeInAnimation.duration = ANIMATION_DUR;
[hud.layer addAnimation:fadeInAnimation forKey:nil];
[hud.layer setOpacity:1];
[CATransaction commit];
}
}
- (void)hideHudWithAnimation:(NSView *)hud
{
if (hud.layer.opacity != 0)
{
[CATransaction begin];
CABasicAnimation *fadeOutAnimation = [CABasicAnimation animationWithKeyPath:@"opacity"];
fadeOutAnimation.fromValue = @(hud.layer.presentationLayer.opacity);
fadeOutAnimation.toValue = @(0.0);
fadeOutAnimation.beginTime = 0.0;
fadeOutAnimation.duration = ANIMATION_DUR;
[hud.layer addAnimation:fadeOutAnimation forKey:nil];
[hud.layer setOpacity:0];
[CATransaction commit];
}
}
#pragma MARK: - Preview index
- (void)setSelectedIndex:(NSInteger)selectedIndex
{
NSInteger count = self.generator.imagesCount;
if (selectedIndex >= count)
{
selectedIndex = count -1;
}
else if (selectedIndex < 0)
{
selectedIndex = 0;
}
_selectedIndex = selectedIndex;
}
- (IBAction)next:(id)sender
{
self.selectedIndex += 1;
[self updatePicture];
}
- (IBAction)previous:(id)sender
{
self.selectedIndex -= 1;
[self updatePicture];
}
- (void)updatePicture
{
if (self.generator && self.visible)
{
CGImageRef fPreviewImage = [self.generator copyImageAtIndex:self.selectedIndex shouldCache:YES];
self.previewView.image = fPreviewImage;
CFRelease(fPreviewImage);
}
}
- (void)scrollWheel:(NSEvent *)theEvent
{
if (theEvent.deltaY < 0)
{
self.selectedIndex += 1;
[self updatePicture];
}
else if (theEvent.deltaY > 0)
{
self.selectedIndex -= 1;
[self updatePicture];
}
}
@end
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