Eject Button class. switches to the alt image when hovering.

Ample/Base.lproj/MediaView.xib

@@ -77,11 +77,11 @@
                                                 <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES" flexibleMaxY="YES"/>
                                                 <imageCell key="cell" refusesFirstResponder="YES" alignment="left" imageAlignment="left" image="drag-handle-4x10" id="x7F-qD-5y9"/>
                                             </imageView>
-                                            <button verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="zNo-ij-mUl">
+                                            <button verticalHuggingPriority="750" fixedFrame="YES" translatesAutoresizingMaskIntoConstraints="NO" id="zNo-ij-mUl" customClass="EjectButton">
                                                 <rect key="frame" x="261" y="5" width="16" height="16"/>
                                                 <autoresizingMask key="autoresizingMask" flexibleMinX="YES" flexibleMinY="YES" flexibleMaxY="YES"/>
                                                 <buttonCell key="cell" type="bevel" bezelStyle="regularSquare" image="eject-16x16" imagePosition="only" alignment="center" alternateImage="eject-hover-16x16" imageScaling="proportionallyDown" inset="2" id="IZA-Tu-olu">
-                                                    <behavior key="behavior" lightByContents="YES"/>
+                                                    <behavior key="behavior" pushIn="YES" lightByBackground="YES" lightByGray="YES"/>
                                                     <font key="font" metaFont="system"/>
                                                 </buttonCell>
                                                 <connections>

Ample/EjectButton.h

@@ -0,0 +1,17 @@
+//
+//  EjectButton.h
+//  Ample
+//
+//  Created by Kelvin Sherlock on 9/7/2020.
+//  Copyright © 2020 Kelvin Sherlock. All rights reserved.
+//
+
+#import <Cocoa/Cocoa.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+@interface EjectButton : NSButton
+
+@end
+
+NS_ASSUME_NONNULL_END

Ample/EjectButton.m

@@ -0,0 +1,42 @@
+//
+//  EjectButton.m
+//  Ample
+//
+//  Created by Kelvin Sherlock on 9/7/2020.
+//  Copyright © 2020 Kelvin Sherlock. All rights reserved.
+//
+
+#import "EjectButton.h"
+
+static NSImage *ejectImage = nil;
+static NSImage *ejectHoverImage = nil;
+
+@implementation EjectButton {
+    NSTrackingRectTag _tracking;
+}
+
++(void)initialize {
+    // content tint only works with template images.
+    ejectImage = [NSImage imageNamed: @"eject-16x16"];
+    ejectHoverImage = [NSImage imageNamed: @"eject-hover-16x16"];
+    [ejectImage setTemplate: YES];
+    [ejectHoverImage setTemplate: YES];
+}
+
+-(void)awakeFromNib {
+    [super awakeFromNib];
+    [self setButtonType: NSButtonTypeMomentaryPushIn];
+    [self setImage: ejectImage];
+    [self setAlternateImage: ejectHoverImage];
+    _tracking = [self addTrackingRect: [self bounds] owner: self userData: nil assumeInside: NO];
+}
+
+-(void)mouseEntered:(NSEvent *)event {
+    if ([self isEnabled])
+        [self setImage: ejectHoverImage];
+}
+-(void)mouseExited:(NSEvent *)event {
+    [self setImage: ejectImage];
+}
+
+@end

Ample/MediaViewController.m

@@ -13,6 +13,7 @@
     NSTrackingRectTag _trackingRect;
 }
 
+#if 0
 -(void)awakeFromNib {
     
     // this is apparently necessary for setTintColor to work.
@@ -22,6 +23,7 @@
     img = [_ejectButton alternateImage];
     [img setTemplate: YES];
 }
+#endif
 
 -(void)viewDidMoveToSuperview {
     if (_trackingRect) {