more

Demo/Sources/Demos/Demo Screens/AccordionViewController.swift

@@ -55,20 +55,18 @@ fileprivate struct AccordionHeader : BlueprintHeaderFooterContent, Equatable
     }
 
     var background: Element? {
-        Overlay(
-            elements: [
-                Box(backgroundColor: .white),
-                Box(backgroundColor: .init(white: 0.85, alpha: 1.0))
-                    .constrainedTo(height: .absolute(1.0))
-                    .aligned(vertically: .bottom, horizontally: .fill)
-            ]
-        )
+        self.background(with: .white)
     }
 
     var pressedBackground: Element? {
+        self.background(with: .white(0.9))
+    }
+
+    private func background(with color : UIColor) -> Element {
         Overlay(
             elements: [
-                Box(backgroundColor: .white(0.9)),
+                Box(backgroundColor: color),
+
                 Box(backgroundColor: .init(white: 0.85, alpha: 1.0))
                     .constrainedTo(height: .absolute(1.0))
                     .aligned(vertically: .bottom, horizontally: .fill)
@@ -77,6 +75,7 @@ fileprivate struct AccordionHeader : BlueprintHeaderFooterContent, Equatable
     }
 }
 
+
 fileprivate struct AccordionRow : BlueprintItemContent, Equatable
 {
     var text : String

Listable/Sources/HeaderFooter/HeaderFooterContent.swift

@@ -75,9 +75,9 @@ public protocol HeaderFooterContent
     ///
     associatedtype PressedBackgroundView:UIView = BackgroundView
 
-    /// Create and return a new background view used to render the content's selected background.
+    /// Create and return a new background view used to render the content's pressed background.
     ///
-    /// This view is displayed when the content is highlighted or selected.
+    /// This view is displayed when the user taps/presses the header / footer.
     ///
     /// If your `BackgroundView` and `SelectedBackgroundView` are the same type, this method
     /// is provided automatically by calling `createReusableBackgroundView`.

Listable/Sources/Internal/HeaderFooterContentView.swift

@@ -32,9 +32,11 @@ final class HeaderFooterContentView<Content:HeaderFooterContent> : UIView
 
     override init(frame: CGRect) {
 
-        self.content = Content.createReusableContentView(frame: frame)
-        self.background = Content.createReusableBackgroundView(frame: frame)
-        self.pressedBackground = Content.createReusablePressedBackgroundView(frame: frame)
+        let bounds = CGRect(origin: .zero, size: frame.size)
+
+        self.content = Content.createReusableContentView(frame: bounds)
+        self.background = Content.createReusableBackgroundView(frame: bounds)
+        self.pressedBackground = Content.createReusablePressedBackgroundView(frame: bounds)
 
         self.pressRecognizer = PressGestureRecognizer()
         self.pressRecognizer.minimumPressDuration = 0.0
@@ -136,8 +138,16 @@ fileprivate final class PressGestureRecognizer : UILongPressGestureRecognizer {
         self.initialPoint = self.location(in: self.view)
     }
 
-    override func canPrevent(_ preventedGestureRecognizer: UIGestureRecognizer) -> Bool {
-        false
+    override func canPrevent(_ gesture: UIGestureRecognizer) -> Bool {
+
+        // We want to allow the pan gesture of our containing scroll view to continue to track
+        // when the user moves their finger vertically or horizontally, when we are cancelled.
+
+        if let panGesture = gesture as? UIPanGestureRecognizer, panGesture.view is UIScrollView {
+            return false
+        }
+
+        return super.canPrevent(gesture)
     }
 
     override func touchesMoved(_ touches: Set<UITouch>, with event: UIEvent) {

Listable/Sources/Layout/SupplementaryKind.swift

@@ -8,7 +8,7 @@
 import Foundation
 
 
-public enum SupplementaryKind : String, CaseIterable
+enum SupplementaryKind : String, CaseIterable
 {
     case listHeader = "Listable.ListHeader"
     case listFooter = "Listable.ListFooter"

README.md

@@ -481,6 +481,12 @@ public protocol HeaderFooterContent
 
     associatedtype ContentView:UIView
     static func createReusableContentView(frame : CGRect) -> ContentView
+
+    associatedtype BackgroundView:UIView
+    static func createReusableBackgroundView(frame : CGRect) -> BackgroundView
+
+    associatedtype PressedBackgroundView:UIView
+    static func createReusablePressedBackgroundView(frame : CGRect) -> PressedBackgroundView
 }
 ```