Show Volume slider in NSPopover instead of CGWindow.

Also perform Haptic feedback when volume slider is at 100%.

Window/VolumeButton.h

@@ -6,9 +6,11 @@
 //  Copyright 2009 __MyCompanyName__. All rights reserved.
 //
 
-#import "PopupButton.h"
+#import <Cocoa/Cocoa.h>
+#import "VolumeSlider.h"
 
-@interface VolumeButton : PopupButton {
+@interface VolumeButton : NSButton {
+    IBOutlet VolumeSlider *_popView;
 }
 
 @end

Window/VolumeButton.m

@@ -7,29 +7,45 @@
 //
 
 #import "VolumeButton.h"
-#import "VolumeSlider.h"
 #import "PlaybackController.h"
 
-@implementation VolumeButton
+@implementation VolumeButton {
+    NSPopover *popover;
+}
+
+- (void)awakeFromNib
+{
+    popover = [[NSPopover alloc] init];
+
+    NSViewController * viewController = [[NSViewController alloc] init];
+    viewController.view = _popView;
+    popover.contentViewController = viewController;
+    popover.behavior = NSPopoverBehaviorTransient;
+    [popover setContentSize:_popView.bounds.size];
+}
 
 - (void)scrollWheel:(NSEvent *)theEvent
 {
-	double change = [theEvent deltaY];
-	
-	[(VolumeSlider *)_popView setDoubleValue:[(VolumeSlider *)_popView doubleValue] + change];
-	
-	[[(VolumeSlider *)_popView target] changeVolume:_popView];
-	
-	[(VolumeSlider *)_popView showToolTipForView:self closeAfter:1.0];
+    if ([popover isShown]) {
+        [_popView scrollWheel:theEvent];
+        return;
+    }
+
+    double change = [theEvent deltaY];
+
+    [_popView setDoubleValue:[_popView doubleValue] + change];
+
+    [[_popView target] changeVolume:_popView];
+
+    [_popView showToolTipForView:self closeAfter:1.0];
 }
 
 - (void)mouseDown:(NSEvent *)theEvent
 {
-	[(VolumeSlider *)_popView hideToolTip];
-	
-	[super mouseDown:theEvent];
+    [_popView hideToolTip];
+    [popover showRelativeToRect:self.bounds ofView:self preferredEdge:NSRectEdgeMaxY];
 
-	[(VolumeSlider *)_popView hideToolTip];
+    [super mouseDown:theEvent];
 }
 
 

Window/VolumeSlider.m

@@ -12,6 +12,7 @@
 
 @implementation VolumeSlider {
     NSTimer *currentTimer;
+    BOOL wasInsideSnapRange;
 }
 
 - (id)initWithFrame:(NSRect)frame
@@ -27,6 +28,7 @@
 }
 
 - (void) awakeFromNib {
+    wasInsideSnapRange = NO;
     textView = [[NSText alloc] init];
     [textView setFrame:NSMakeRect(0, 0, 50, 20)];
     textView.drawsBackground = NO;
@@ -39,7 +41,7 @@
     popover = [[NSPopover alloc] init];
     popover.contentViewController = viewController;
     // Don't hide the popover automatically.
-    popover.behavior = NSPopoverBehaviorApplicationDefined;
+    popover.behavior = NSPopoverBehaviorTransient;
     popover.animates = NO;
     [popover setContentSize:textView.bounds.size];
 }
@@ -111,9 +113,23 @@
     // Snap to 100% if value is close
     double snapTarget = logarithmicToLinear(100.0);
     double snapProgress = ([self doubleValue] - snapTarget) / (self.maxValue - self.minValue);
+
     if (fabs(snapProgress) < 0.005)
     {
         [self setDoubleValue:snapTarget];
+        if (!wasInsideSnapRange)
+        {
+            if (@available(macOS 10.11, *))
+            {
+                [[NSHapticFeedbackManager defaultPerformer] performFeedbackPattern:NSHapticFeedbackPatternGeneric
+                                                                   performanceTime:NSHapticFeedbackPerformanceTimeDefault];
+            }
+        }
+        wasInsideSnapRange = YES;
+    }
+    else
+    {
+        wasInsideSnapRange = NO;
     }
 
     [self showToolTip];