From 8a78d2bbf7ff2d26032e0c87a7e11e116872f085 Mon Sep 17 00:00:00 2001
From: Yoshi Askharoun <jjask7@gmail.com>
Date: Mon, 13 May 2024 23:02:07 -0500
Subject: [PATCH] Animate About sections

---
 .../Behaviors/FadeAnimateItemsBehavior.cs     | 38 +++++++++++++++++++
 ZuneModdingHelper/Pages/AboutPage.xaml        | 20 ++++++++--
 2 files changed, 54 insertions(+), 4 deletions(-)

diff --git a/ZuneModdingHelper/Behaviors/FadeAnimateItemsBehavior.cs b/ZuneModdingHelper/Behaviors/FadeAnimateItemsBehavior.cs
index 7ee5b6a..14d3c70 100644
--- a/ZuneModdingHelper/Behaviors/FadeAnimateItemsBehavior.cs
+++ b/ZuneModdingHelper/Behaviors/FadeAnimateItemsBehavior.cs
@@ -76,3 +76,41 @@ public class FadeAnimateItemsBehavior : Behavior<ItemsControl>
         }
     }
 }
+
+public class FadeAnimateItemsPanelBehavior : Behavior<Panel>
+{
+    public DoubleAnimation Animation { get; set; }
+    public TimeSpan Tick { get; set; }
+
+    protected override void OnAttached()
+    {
+        base.OnAttached();
+        AssociatedObject.Loaded += AssociatedObject_Loaded;
+    }
+
+    void AssociatedObject_Loaded(object sender, RoutedEventArgs e)
+    {
+        var items = AssociatedObject.Children.OfType<UIElement>().PruneNull();
+
+        foreach (var item in items)
+            item.Opacity = 0;
+
+        var enumerator = items.GetEnumerator();
+        if (enumerator.MoveNext())
+        {
+            DispatcherTimer timer = new() { Interval = Tick };
+            timer.Tick += (s, timerE) =>
+            {
+                var item = enumerator.Current;
+                if (item is null) return;
+
+                item.BeginAnimation(UIElement.OpacityProperty, Animation);
+                if (!enumerator.MoveNext())
+                {
+                    timer.Stop();
+                }
+            };
+            timer.Start();
+        }
+    }
+}
diff --git a/ZuneModdingHelper/Pages/AboutPage.xaml b/ZuneModdingHelper/Pages/AboutPage.xaml
index fcc5f54..14cfffb 100644
--- a/ZuneModdingHelper/Pages/AboutPage.xaml
+++ b/ZuneModdingHelper/Pages/AboutPage.xaml
@@ -5,6 +5,8 @@
              xmlns:d="http://schemas.microsoft.com/expression/blend/2008" 
              xmlns:local="clr-namespace:ZuneModdingHelper.Pages"
              xmlns:zmh="clr-namespace:ZuneModdingHelper"
+             xmlns:b="clr-namespace:ZuneModdingHelper.Behaviors"
+             xmlns:i="http://schemas.microsoft.com/xaml/behaviors"
              mc:Ignorable="d" 
              d:DesignHeight="350" d:DesignWidth="750"
              d:Background="White">
@@ -43,8 +45,9 @@
                     <Run Text="&#xE004;" FontFamily="{StaticResource ZMHIcons}"/>
                     <Run Text="release notes"/>
                 </Hyperlink><LineBreak/>
-                <LineBreak/>
+            </TextBlock>
             
+            <TextBlock Style="{StaticResource AboutTextBlockStyle}">
                 <Run Text="Community" Style="{StaticResource HeaderTextStyle}"/><LineBreak/>
                 <Hyperlink NavigateUri="https://reddit.com/r/Zune" RequestNavigate="Link_RequestNavigate">
                     <Run Text="&#xE001;" FontFamily="{StaticResource ZMHIcons}"/>
@@ -54,8 +57,9 @@
                     <Run Text="&#xE002;" FontFamily="{StaticResource ZMHIcons}"/>
                     <Run Text="join r/zune discord server"/>
                 </Hyperlink><LineBreak/>
-                <LineBreak/>
-            
+            </TextBlock>
+
+            <TextBlock Style="{StaticResource AboutTextBlockStyle}">
                 <Run Text="Development" Style="{StaticResource HeaderTextStyle}"/><LineBreak/>
                 <Run Text="by Joshua &quot;Yoshi&quot; Askharoun." FontWeight="SemiBold"/>
                 <Run Text="Mods included with authors' permission."/><LineBreak/>
@@ -75,8 +79,16 @@
                 <Hyperlink NavigateUri="{x:Static zmh:App.DonateUri}" RequestNavigate="Link_RequestNavigate">
                     <Run Text="&#xE006;" FontFamily="{StaticResource ZMHIcons}"/>
                     <Run Text="donate"/>
-                </Hyperlink><LineBreak/>
+                </Hyperlink>
             </TextBlock>
+
+            <i:Interaction.Behaviors>
+                <b:FadeAnimateItemsPanelBehavior Tick="0:0:0.05">
+                    <b:FadeAnimateItemsPanelBehavior.Animation>
+                        <DoubleAnimation From="0" To="1" Duration="0:0:0.3"/>
+                    </b:FadeAnimateItemsPanelBehavior.Animation>
+                </b:FadeAnimateItemsPanelBehavior>
+            </i:Interaction.Behaviors>
         </StackPanel>
     </ScrollViewer>
 </UserControl>