Displays dummy data in SaveStatesViewController

Common/Collection View/GridCollectionViewCell.swift

@@ -50,6 +50,7 @@ class GridCollectionViewCell: UICollectionViewCell
         self.contentView.clipsToBounds = false
         
         self.imageView.translatesAutoresizingMaskIntoConstraints = false
+        self.imageView.contentMode = .ScaleAspectFit
         #if os(tvOS)
             self.imageView.adjustsImageWhenAncestorFocused = true
         #endif
@@ -135,7 +136,7 @@ private extension GridCollectionViewCell
         self.imageViewWidthConstraint.constant = self.maximumImageSize.width
         self.imageViewHeightConstraint.constant = self.maximumImageSize.height
         
-        self.textLabelVerticalSpacingConstraint.constant = self.maximumImageSize.height / 10.0
+        self.textLabelVerticalSpacingConstraint.constant = 8
         self.textLabelFocusedVerticalSpacingConstraint?.constant = self.maximumImageSize.height / 10.0
     }
 }

Common/Collection View/GridCollectionViewLayout.swift

@@ -12,7 +12,11 @@ class GridCollectionViewLayout: UICollectionViewFlowLayout
 {
     var itemWidth: CGFloat = 150 {
         didSet {
-            self.invalidateLayout()
+            // Only invalidate if needed, otherwise could potentially cause endless loop
+            if oldValue != self.itemWidth
+            {
+                self.invalidateLayout()
+            }
         }
     }
     

Delta/Pause Menu/Presentation Controller/PausePresentationController.swift

@@ -39,13 +39,19 @@ class PausePresentationController: UIPresentationController
     {
         guard let containerView = self.containerView else { return super.frameOfPresentedViewInContainerView() }
         
-        var contentHeight = self.presentedViewController.preferredContentSize.height
+        let frame: CGRect
+        let contentHeight = self.presentedViewController.preferredContentSize.height
+        
         if contentHeight == 0
         {
-            contentHeight = containerView.bounds.height - UIApplication.sharedApplication().statusBarFrame.height
+            let statusBarHeight = UIApplication.sharedApplication().statusBarFrame.height
+            frame = CGRect(x: 0, y: statusBarHeight, width: containerView.bounds.width, height: containerView.bounds.height - statusBarHeight)
+        }
+        else
+        {
+            frame = CGRect(x: 0, y: containerView.bounds.height - contentHeight, width: containerView.bounds.width, height: containerView.bounds.height)
         }
         
-        let frame = CGRect(x: 0, y: containerView.bounds.height - contentHeight, width: containerView.bounds.width, height: containerView.bounds.height)
         return frame
     }
     

Delta/Pause Menu/Save States/SaveStatesViewController.swift

@@ -10,25 +10,90 @@ import UIKit
 
 import Roxas
 
+private let SaveStatesViewControllerContentInset: CGFloat = 20
+
 class SaveStatesViewController: UICollectionViewController
 {
     private var backgroundView: RSTBackgroundView!
     
+    private var prototypeCell = GridCollectionViewCell()
+    private var prototypeCellWidthConstraint: NSLayoutConstraint!
+}
+
+extension SaveStatesViewController
+{
     override func viewDidLoad()
     {
         super.viewDidLoad()
         
         self.backgroundView = RSTBackgroundView(frame: self.view.bounds)
+        self.backgroundView.hidden = true
         self.backgroundView.autoresizingMask = [.FlexibleWidth, .FlexibleHeight]
         self.backgroundView.textLabel.text = NSLocalizedString("No Save States", comment: "")
         self.backgroundView.textLabel.textColor = UIColor.whiteColor()
         self.backgroundView.detailTextLabel.text = NSLocalizedString("You can create a new save state by pressing the + button in the top right.", comment: "")
         self.backgroundView.detailTextLabel.textColor = UIColor.whiteColor()
         self.view.insertSubview(self.backgroundView, atIndex: 0)
+        
+        // We update the layout in code because we need to use our SaveStatesViewControllerContentInset constant
+        // The reason for this is we cannot query the layout for its sectionInset in viewDidLayoutSubviews, so might as well be explicit in code with a constant
+        // Otherwise, we could configure this all in Interface Builder, but we'd still need to hardcode 20 in for viewDidLayoutSubviews
+        let collectionViewLayout = self.collectionViewLayout as! GridCollectionViewLayout
+        collectionViewLayout.sectionInset = UIEdgeInsets(top: SaveStatesViewControllerContentInset, left: SaveStatesViewControllerContentInset, bottom: SaveStatesViewControllerContentInset, right: SaveStatesViewControllerContentInset)
+        collectionViewLayout.minimumInteritemSpacing = SaveStatesViewControllerContentInset
+        collectionViewLayout.minimumLineSpacing = SaveStatesViewControllerContentInset
+        
+        let portraitScreenWidth = UIScreen.mainScreen().coordinateSpace.convertRect(UIScreen.mainScreen().bounds, toCoordinateSpace: UIScreen.mainScreen().fixedCoordinateSpace).width
+        collectionViewLayout.itemWidth = (portraitScreenWidth - ((SaveStatesViewControllerContentInset) * 3)) / 2
+        
+        // Manually update prototype cell properties
+        self.prototypeCellWidthConstraint = self.prototypeCell.contentView.widthAnchor.constraintEqualToConstant(collectionViewLayout.itemWidth)
+        self.prototypeCellWidthConstraint.active = true
     }
     
     override func didReceiveMemoryWarning()
     {
         super.didReceiveMemoryWarning()
     }
+}
+
+private extension SaveStatesViewController
+{
+    func configureCollectionViewCell(cell: GridCollectionViewCell, forIndexPath indexPath: NSIndexPath)
+    {
+        cell.imageView.backgroundColor = UIColor.whiteColor()
+        cell.imageView.image = UIImage(named: "DeltaPlaceholder")
+        
+        cell.maximumImageSize = CGSizeMake(self.prototypeCellWidthConstraint.constant, (self.prototypeCellWidthConstraint.constant / 4.0) * 3.0)
+        
+        cell.textLabel.textColor = UIColor.whiteColor()
+        cell.textLabel.font = UIFont.preferredFontForTextStyle(UIFontTextStyleSubheadline)
+        cell.textLabel.text = "Save State"
+    }
+}
+
+extension SaveStatesViewController
+{
+    override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int
+    {
+        return 12
+    }
+    
+    override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell
+    {
+        let cell = collectionView.dequeueReusableCellWithReuseIdentifier(RSTGenericCellIdentifier, forIndexPath: indexPath) as! GridCollectionViewCell
+        self.configureCollectionViewCell(cell, forIndexPath: indexPath)
+        return cell
+    }
+}
+
+extension SaveStatesViewController: UICollectionViewDelegateFlowLayout
+{
+    func collectionView(collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: NSIndexPath) -> CGSize
+    {
+        self.configureCollectionViewCell(self.prototypeCell, forIndexPath: indexPath)
+        
+        let size = self.prototypeCell.contentView.systemLayoutSizeFittingSize(UILayoutFittingCompressedSize)
+        return size
+    }
 }

Resources/Assets.xcassets/DeltaPlaceholder.imageset/Contents.json

@@ -0,0 +1,23 @@
+{
+  "images" : [
+    {
+      "idiom" : "universal",
+      "filename" : "DeltaPlaceholder.png",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "DeltaPlaceholder@2x.png",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "filename" : "DeltaPlaceholder@3x.png",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "version" : 1,
+    "author" : "xcode"
+  }
+}