Add a leafier tree state

MemoryTree/Assets.xcassets/TreeLeafier.imageset/Contents.json

@@ -0,0 +1,21 @@
+{
+  "images" : [
+    {
+      "filename" : "TreeLeafier.png",
+      "idiom" : "universal",
+      "scale" : "1x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "2x"
+    },
+    {
+      "idiom" : "universal",
+      "scale" : "3x"
+    }
+  ],
+  "info" : {
+    "author" : "xcode",
+    "version" : 1
+  }
+}

MemoryTree/ContentView.swift

@@ -32,6 +32,26 @@ struct ContentView: View {
 
     @State var entryText = ""
 
+    var treeImageName: String {
+        if entries.isEmpty {
+            return "TreeBare"
+        } else if entries.count < 3 {
+            return "TreeLeafy"
+        } else {
+            return "TreeLeafier"
+        }
+    }
+
+    var treeHeight: Double {
+        if entries.isEmpty {
+            return 100
+        } else if entries.count < 3 {
+            return 300
+        } else {
+            return 400
+        }
+    }
+
     var body: some View {
         NavigationStack {
             VStack(spacing: 0) {
@@ -49,13 +69,13 @@ struct ContentView: View {
                 Button {
                     isEditing = true
                 } label: {
-                    Image(entries.isEmpty ? "TreeBare" : "TreeLeafy")
+                    Image(treeImageName)
                         .renderingMode(.template)
                         .resizable()
                         .scaledToFit()
                         .foregroundColor(.white)
                 }
-                .frame(maxHeight: entries.isEmpty ? 100 : 300)
+                .frame(maxHeight: treeHeight)
 
                 Color.green
                     .frame(height: 80)
@@ -86,12 +106,23 @@ struct ContentView_Previews: PreviewProvider {
     static var previews: some View {
         Group {
             ContentView()
+                .previewDisplayName("Bare")
 
             ContentView(isEditing: true)
+                .previewDisplayName("Adding Entry")
 
             ContentView(entries: [Entry(text: "Coffee")])
+                .previewDisplayName("Leafy")
 
             ContentView(isEditing: true, entries: [Entry(text: "Coffee")])
+                .previewDisplayName("Leafy - Adding Entry")
+
+            ContentView(entries: [
+                Entry(text: "Coffee"),
+                Entry(text: "Marion berries"),
+                Entry(text: "Burritos"),
+            ])
+            .previewDisplayName("Leafier")
         }
         .tint(.white)
     }