Nicer toolbar buttons

App/Common UI/SegmentedReliefButton.swift

@@ -0,0 +1,57 @@
+//
+//  SegmentedReliefButton.swift
+//  App
+//
+//  Created by James Magahern on 8/14/20.
+//
+
+import UIKit
+
+class SegmentedReliefButton: ReliefButton
+{
+    var children: [ReliefButton] = [] {
+        willSet { children.forEach { $0.removeFromSuperview() } }
+        didSet  { children.forEach { addSubview($0) }; setNeedsLayout() }
+    }
+    
+    init(children: [ReliefButton]) {
+        super.init()
+        self.children = children
+    }
+    
+    override var isHighlighted: Bool {
+        didSet {}
+    }
+    
+    required init?(coder: NSCoder) {
+        fatalError("init(coder:) has not been implemented")
+    }
+    
+    override func sizeThatFits(_ size: CGSize) -> CGSize {
+        let width: CGFloat = children.reduce(0.0) { (result, button) -> CGFloat in
+            return result + button.sizeThatFits(size).width
+        }
+        
+        return CGSize(width: width, height: size.height)
+    }
+    
+    override func layoutSubviews() {
+        super.layoutSubviews()
+        
+        backgroundView.frame = bounds
+        shadowView.frame = bounds
+        
+        var buttonRect = CGRect(origin: .zero, size: CGSize(width: 0, height: bounds.height))
+        for child in children {
+            child.shadowView.isHidden = true
+            child.backgroundView.layer.borderWidth = 0
+            bringSubviewToFront(child)
+            
+            let childSize = child.sizeThatFits(bounds.size)
+            buttonRect.size = CGSize(width: childSize.width, height: bounds.height)
+            child.frame = buttonRect
+            
+            buttonRect.origin.x += buttonRect.width
+        }
+    }
+}