MacGui: add a next and previous button to the summary panel preview.

1 files changed, 209 insertions, 0 deletions

diff --git a/macosx/HBPreviewViewController.m b/macosx/HBPreviewViewController.m
new file mode 100644
index 000000000..a9e275e28
--- /dev/null
+++ b/macosx/HBPreviewViewController.m
@@ -0,0 +1,209 @@
+//
+//  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