From b8c264d1353659946d4d7cc365ac5595a2319546 Mon Sep 17 00:00:00 2001
From: NaBian <836904362@qq.com>
Date: Sat, 23 Feb 2019 20:06:03 +0800
Subject: [PATCH] add GotoTop

---
 HandyControl/Controls/Other/GotoTop.cs        | 100 ++++++++++++++++++
 HandyControl/HandyControl.csproj              |   9 ++
 .../Themes/Styles/Base/GotoTopBaseStyle.xaml  |  28 +++++
 HandyControl/Themes/Styles/GotoTop.xaml       |  10 ++
 HandyControl/Themes/Styles/Style.xaml         |   1 +
 HandyControl/Tools/Helper/VisualHelper.cs     |  33 +++++-
 HandyControlDemo/Data/MessageToken.cs         |   2 +
 HandyControlDemo/Data/MessageToken.tt         |   3 +-
 HandyControlDemo/HandyControlDemo.csproj      |   8 ++
 .../Properties/Langs/Lang.Designer.cs         |   9 ++
 .../Properties/Langs/Lang.en.resx             |   3 +
 HandyControlDemo/Properties/Langs/Lang.resx   |   3 +
 .../Img/LeftMainContent/GoToTop_16x.png       | Bin 0 -> 194 bytes
 .../UserControl/Controls/GotoTopDemoCtl.xaml  |  19 ++++
 .../Controls/GotoTopDemoCtl.xaml.cs           |  10 ++
 .../UserControl/Main/LeftMainContent.xaml     |   7 +-
 16 files changed, 238 insertions(+), 7 deletions(-)
 create mode 100644 HandyControl/Controls/Other/GotoTop.cs
 create mode 100644 HandyControl/Themes/Styles/Base/GotoTopBaseStyle.xaml
 create mode 100644 HandyControl/Themes/Styles/GotoTop.xaml
 create mode 100644 HandyControlDemo/Resources/Img/LeftMainContent/GoToTop_16x.png
 create mode 100644 HandyControlDemo/UserControl/Controls/GotoTopDemoCtl.xaml
 create mode 100644 HandyControlDemo/UserControl/Controls/GotoTopDemoCtl.xaml.cs

diff --git a/HandyControl/Controls/Other/GotoTop.cs b/HandyControl/Controls/Other/GotoTop.cs
new file mode 100644
index 00000000..199da8c7
--- /dev/null
+++ b/HandyControl/Controls/Other/GotoTop.cs
@@ -0,0 +1,100 @@
+using System;
+using System.Windows;
+using System.Windows.Controls;
+using HandyControl.Data;
+using HandyControl.Tools;
+using HandyControl.Tools.Extension;
+
+namespace HandyControl.Controls
+{
+    public class GotoTop : Button
+    {
+        private Action _gotoTopAction;
+
+        private System.Windows.Controls.ScrollViewer _scrollViewer;
+
+        public static readonly DependencyProperty TargetProperty = DependencyProperty.Register(
+            "Target", typeof(DependencyObject), typeof(GotoTop), new PropertyMetadata(default(DependencyObject)));
+
+        public DependencyObject Target
+        {
+            get => (DependencyObject)GetValue(TargetProperty);
+            set => SetValue(TargetProperty, value);
+        }
+
+        public GotoTop() => Loaded += (s, e) => CreateGotoAction(Target);
+
+        public virtual void CreateGotoAction(DependencyObject obj)
+        {
+            if (_scrollViewer != null)
+            {
+                _scrollViewer.ScrollChanged -= ScrollViewer_ScrollChanged;
+            }
+            _scrollViewer = VisualHelper.GetGetChild<System.Windows.Controls.ScrollViewer>(obj);
+            if (_scrollViewer != null)
+            {
+                _scrollViewer.ScrollChanged += ScrollViewer_ScrollChanged;
+
+                if (_scrollViewer is ScrollViewer scrollViewerHandy && Animated && scrollViewerHandy.IsEnableInertia)
+                {
+                    _gotoTopAction = () => scrollViewerHandy.ScrollToVerticalOffsetInternal(0, AnimationTime);
+                }
+                else
+                {
+                    _gotoTopAction = () => _scrollViewer.ScrollToTop();
+                }
+            }
+        }
+
+        private void ScrollViewer_ScrollChanged(object sender, ScrollChangedEventArgs e)
+        {
+            if (AutoHiding)
+            {
+                this.Show(e.VerticalOffset >= HidingHeight);
+            }
+        }
+
+        public static readonly DependencyProperty AnimatedProperty = DependencyProperty.Register(
+            "Animated", typeof(bool), typeof(GotoTop), new PropertyMetadata(ValueBoxes.TrueBox));
+
+        public bool Animated
+        {
+            get => (bool) GetValue(AnimatedProperty);
+            set => SetValue(AnimatedProperty, value);
+        }
+
+        public static readonly DependencyProperty AnimationTimeProperty = DependencyProperty.Register(
+            "AnimationTime", typeof(double), typeof(GotoTop), new PropertyMetadata(ValueBoxes.Double200Box));
+
+        public double AnimationTime
+        {
+            get => (double) GetValue(AnimationTimeProperty);
+            set => SetValue(AnimationTimeProperty, value);
+        }
+
+        public static readonly DependencyProperty HidingHeightProperty = DependencyProperty.Register(
+            "HidingHeight", typeof(double), typeof(GotoTop), new PropertyMetadata(default(double)));
+
+        public double HidingHeight
+        {
+            get => (double) GetValue(HidingHeightProperty);
+            set => SetValue(HidingHeightProperty, value);
+        }
+
+        public static readonly DependencyProperty AutoHidingProperty = DependencyProperty.Register(
+            "AutoHiding", typeof(bool), typeof(GotoTop), new PropertyMetadata(ValueBoxes.TrueBox));
+
+        public bool AutoHiding
+        {
+            get => (bool) GetValue(AutoHidingProperty);
+            set => SetValue(AutoHidingProperty, value);
+        }
+
+        protected override void OnClick()
+        {
+            base.OnClick();
+
+            _gotoTopAction?.Invoke();
+        }
+    }
+}
\ No newline at end of file
diff --git a/HandyControl/HandyControl.csproj b/HandyControl/HandyControl.csproj
index 0b3cdcc7..efbf174e 100644
--- a/HandyControl/HandyControl.csproj
+++ b/HandyControl/HandyControl.csproj
@@ -111,6 +111,7 @@
     <Compile Include="Controls\Other\Carousel.cs" />
     <Compile Include="Controls\Cover\CoverView\CoverView.cs" />
     <Compile Include="Controls\Other\ChatBubble.cs" />
+    <Compile Include="Controls\Other\GotoTop.cs" />
     <Compile Include="Controls\Transfer\Transfer.cs" />
     <Compile Include="Controls\Transfer\TransferGroup.cs" />
     <Compile Include="Controls\Transfer\TransferItem.cs" />
@@ -379,6 +380,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="Themes\Styles\Base\GotoTopBaseStyle.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="Themes\Styles\Base\ProgressButtonBaseStyle.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
@@ -427,6 +432,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="Themes\Styles\GotoTop.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="Themes\Styles\GroupBox.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
diff --git a/HandyControl/Themes/Styles/Base/GotoTopBaseStyle.xaml b/HandyControl/Themes/Styles/Base/GotoTopBaseStyle.xaml
new file mode 100644
index 00000000..5c90ba29
--- /dev/null
+++ b/HandyControl/Themes/Styles/Base/GotoTopBaseStyle.xaml
@@ -0,0 +1,28 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+                    xmlns:controls="clr-namespace:HandyControl.Controls">
+    
+    <ResourceDictionary.MergedDictionaries>
+        <ResourceDictionary Source="../../Basic/Geometries.xaml"/>
+        <ResourceDictionary Source="../Button.xaml"/>
+    </ResourceDictionary.MergedDictionaries>
+
+    <Style x:Key="GotoTopBaseStyle" BasedOn="{StaticResource ButtonBaseStyle}" TargetType="controls:GotoTop">
+        <Setter Property="Width" Value="50"/>
+        <Setter Property="Height" Value="50"/>
+        <Setter Property="controls:BorderElement.CornerRadius" Value="25"/>
+        <Setter Property="controls:IconElement.Geometry" Value="{StaticResource UpGeometry}"/>
+        <Setter Property="Foreground" Value="{DynamicResource PrimaryTextBrush}"/>
+        <Setter Property="Padding" Value="16"/>
+        <Setter Property="BorderThickness" Value="1"/>
+        <Style.Triggers>
+            <Trigger Property="IsMouseOver" Value="True">
+                <Setter Property="Background" Value="{DynamicResource DarkDefaultBrush}"/>
+            </Trigger>
+            <Trigger Property="IsPressed" Value="True">
+                <Setter Property="Background" Value="{DynamicResource BorderBrush}"/>
+            </Trigger>
+        </Style.Triggers>
+    </Style>
+
+</ResourceDictionary>
\ No newline at end of file
diff --git a/HandyControl/Themes/Styles/GotoTop.xaml b/HandyControl/Themes/Styles/GotoTop.xaml
new file mode 100644
index 00000000..ebe37f33
--- /dev/null
+++ b/HandyControl/Themes/Styles/GotoTop.xaml
@@ -0,0 +1,10 @@
+<ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+                    xmlns:controls="clr-namespace:HandyControl.Controls">
+    
+    <ResourceDictionary.MergedDictionaries>
+        <ResourceDictionary Source="Base/GotoTopBaseStyle.xaml"/>
+    </ResourceDictionary.MergedDictionaries>
+
+    <Style BasedOn="{StaticResource GotoTopBaseStyle}" TargetType="controls:GotoTop"/>
+
+</ResourceDictionary>
\ No newline at end of file
diff --git a/HandyControl/Themes/Styles/Style.xaml b/HandyControl/Themes/Styles/Style.xaml
index 4c60d443..dfc27adc 100644
--- a/HandyControl/Themes/Styles/Style.xaml
+++ b/HandyControl/Themes/Styles/Style.xaml
@@ -57,6 +57,7 @@
         <ResourceDictionary Source="ProgressButton.xaml"/>
         <ResourceDictionary Source="Transfer.xaml"/>
         <ResourceDictionary Source="ChatBubble.xaml"/>
+        <ResourceDictionary Source="GotoTop.xaml"/>
     </ResourceDictionary.MergedDictionaries>
 
 </ResourceDictionary>
\ No newline at end of file
diff --git a/HandyControl/Tools/Helper/VisualHelper.cs b/HandyControl/Tools/Helper/VisualHelper.cs
index 115a74c8..e49effc2 100644
--- a/HandyControl/Tools/Helper/VisualHelper.cs
+++ b/HandyControl/Tools/Helper/VisualHelper.cs
@@ -1,14 +1,15 @@
 using System.Linq;
 using System.Windows;
+using System.Windows.Controls;
 using System.Windows.Media;
 
 namespace HandyControl.Tools
 {
     public class VisualHelper
     {
-        internal static VisualStateGroup TryGetVisualStateGroup(DependencyObject dependencyObject, string groupName)
+        internal static VisualStateGroup TryGetVisualStateGroup(DependencyObject d, string groupName)
         {
-            var root = GetImplementationRoot(dependencyObject);
+            var root = GetImplementationRoot(d);
             if (root == null)
             {
                 return null;
@@ -20,13 +21,35 @@ namespace HandyControl.Tools
                 .FirstOrDefault(group => string.CompareOrdinal(groupName, group.Name) == 0);
         }
 
-        internal static FrameworkElement GetImplementationRoot(DependencyObject dependencyObject)
+        internal static FrameworkElement GetImplementationRoot(DependencyObject d)
         {
-            return 1 == VisualTreeHelper.GetChildrenCount(dependencyObject)
-                ? VisualTreeHelper.GetChild(dependencyObject, 0) as FrameworkElement
+            return 1 == VisualTreeHelper.GetChildrenCount(d)
+                ? VisualTreeHelper.GetChild(d, 0) as FrameworkElement
                 : null;
         }
 
+        internal static T GetGetChild<T>(DependencyObject d) where T : DependencyObject
+        {
+            if (d is T scrollViewer)
+            {
+                return scrollViewer;
+            }
+
+            for (int i = 0; i < VisualTreeHelper.GetChildrenCount(d); i++)
+            {
+                var child = VisualTreeHelper.GetChild(d, i);
+
+                var result = GetGetChild<T>(child);
+                if (result != null) return result;
+            }
+
+            return default(T);
+        }
+
+        /// <summary>
+        ///     获取当前应用中处于激活的一个窗口
+        /// </summary>
+        /// <returns></returns>
         public static Window GetActiveWindow() => Application.Current.Windows.OfType<Window>().SingleOrDefault(x => x.IsActive);
     }
 }
\ No newline at end of file
diff --git a/HandyControlDemo/Data/MessageToken.cs b/HandyControlDemo/Data/MessageToken.cs
index c65216bd..e63c9770 100644
--- a/HandyControlDemo/Data/MessageToken.cs
+++ b/HandyControlDemo/Data/MessageToken.cs
@@ -82,6 +82,8 @@
 	
         public static readonly string ChatBubbleDemoCtl = nameof(ChatBubbleDemoCtl);
 	
+        public static readonly string GotoTopDemoCtl = nameof(GotoTopDemoCtl);
+	
         public static readonly string ButtonDemoCtl = nameof(ButtonDemoCtl);
 
         public static readonly string ToggleButtonDemoCtl = nameof(ToggleButtonDemoCtl);
diff --git a/HandyControlDemo/Data/MessageToken.tt b/HandyControlDemo/Data/MessageToken.tt
index 8c10a656..377d9b64 100644
--- a/HandyControlDemo/Data/MessageToken.tt
+++ b/HandyControlDemo/Data/MessageToken.tt
@@ -43,7 +43,8 @@ var controlList = new List<string>
 	"CoverFlowDemoCtl",
 	"ProgressButtonDemoCtl",
 	"TransferDemoCtl",
-	"ChatBubbleDemoCtl"
+	"ChatBubbleDemoCtl",
+	"GotoTopDemoCtl"
 };
 var styleList = new List<string>
 {
diff --git a/HandyControlDemo/HandyControlDemo.csproj b/HandyControlDemo/HandyControlDemo.csproj
index 9b9ae6f4..fb8411db 100644
--- a/HandyControlDemo/HandyControlDemo.csproj
+++ b/HandyControlDemo/HandyControlDemo.csproj
@@ -175,6 +175,9 @@
     <Compile Include="UserControl\Controls\FlipClockDemoCtl.xaml.cs">
       <DependentUpon>FlipClockDemoCtl.xaml</DependentUpon>
     </Compile>
+    <Compile Include="UserControl\Controls\GotoTopDemoCtl.xaml.cs">
+      <DependentUpon>GotoTopDemoCtl.xaml</DependentUpon>
+    </Compile>
     <Compile Include="UserControl\Controls\OutlineTextDemoCtl.xaml.cs">
       <DependentUpon>OutlineTextDemoCtl.xaml</DependentUpon>
     </Compile>
@@ -488,6 +491,10 @@
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
     </Page>
+    <Page Include="UserControl\Controls\GotoTopDemoCtl.xaml">
+      <SubType>Designer</SubType>
+      <Generator>MSBuild:Compile</Generator>
+    </Page>
     <Page Include="UserControl\Controls\OutlineTextDemoCtl.xaml">
       <SubType>Designer</SubType>
       <Generator>MSBuild:Compile</Generator>
@@ -746,6 +753,7 @@
       <Generator>TextTemplatingFileGenerator</Generator>
       <LastGenOutput>MessageToken.cs</LastGenOutput>
     </Content>
+    <Resource Include="Resources\Img\LeftMainContent\GoToTop_16x.png" />
     <Resource Include="Resources\Img\LeftMainContent\Label_16x.png" />
     <Resource Include="Resources\Img\Chat\chat_back1.jpg" />
     <Resource Include="Resources\Img\Chat\chat_back2.jpg" />
diff --git a/HandyControlDemo/Properties/Langs/Lang.Designer.cs b/HandyControlDemo/Properties/Langs/Lang.Designer.cs
index a4e7d112..44d750f8 100644
--- a/HandyControlDemo/Properties/Langs/Lang.Designer.cs
+++ b/HandyControlDemo/Properties/Langs/Lang.Designer.cs
@@ -438,6 +438,15 @@ namespace HandyControlDemo.Properties.Langs {
             }
         }
         
+        /// <summary>
+        ///   查找类似 回到顶部 的本地化字符串。
+        /// </summary>
+        public static string GotoTop {
+            get {
+                return ResourceManager.GetString("GotoTop", resourceCulture);
+            }
+        }
+        
         /// <summary>
         ///   查找类似 分组框 的本地化字符串。
         /// </summary>
diff --git a/HandyControlDemo/Properties/Langs/Lang.en.resx b/HandyControlDemo/Properties/Langs/Lang.en.resx
index 3ea49fc7..3f57a795 100644
--- a/HandyControlDemo/Properties/Langs/Lang.en.resx
+++ b/HandyControlDemo/Properties/Langs/Lang.en.resx
@@ -498,4 +498,7 @@
   <data name="Label" xml:space="preserve">
     <value>Label</value>
   </data>
+  <data name="GotoTop" xml:space="preserve">
+    <value>GotoTop</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/HandyControlDemo/Properties/Langs/Lang.resx b/HandyControlDemo/Properties/Langs/Lang.resx
index 0b8bdbc9..32ab263a 100644
--- a/HandyControlDemo/Properties/Langs/Lang.resx
+++ b/HandyControlDemo/Properties/Langs/Lang.resx
@@ -498,4 +498,7 @@
   <data name="Label" xml:space="preserve">
     <value>标签</value>
   </data>
+  <data name="GotoTop" xml:space="preserve">
+    <value>回到顶部</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/HandyControlDemo/Resources/Img/LeftMainContent/GoToTop_16x.png b/HandyControlDemo/Resources/Img/LeftMainContent/GoToTop_16x.png
new file mode 100644
index 0000000000000000000000000000000000000000..2b3d22a9ac90e387b8e11bc75f63998816b17133
GIT binary patch
literal 194
zcmeAS@N?(olHy`uVBq!ia0vp^0wB!61|;P_|4#%`oCO|{#S9F5he4R}c>anMpkRro
zi(^Pd+}25sTnz?1EWfwetqY(3K>PCQNrxRgH{=O0R|}>k+}-x|*_`Q<rg}Er`>pq%
zYhSoRTA7u>u@4M#3`RbzDthY<nR+&Dc8OCATXEJST_H=8>4C<F4ACEfjt91vGX}dd
oYUi>Z@Mlu--J!E$-mic8ajz!3D{3i+1MO$<boFyt=akR{0Npx67XSbN

literal 0
HcmV?d00001

diff --git a/HandyControlDemo/UserControl/Controls/GotoTopDemoCtl.xaml b/HandyControlDemo/UserControl/Controls/GotoTopDemoCtl.xaml
new file mode 100644
index 00000000..78bd91cd
--- /dev/null
+++ b/HandyControlDemo/UserControl/Controls/GotoTopDemoCtl.xaml
@@ -0,0 +1,19 @@
+<UserControl x:Class="HandyControlDemo.UserControl.GotoTopDemoCtl"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:controls="clr-namespace:HandyControl.Controls;assembly=HandyControl"
+             Background="{DynamicResource RegionBrush}">
+    <Grid Width="500" Height="400">
+        <controls:ScrollViewer Name="ScrollViewerDemo" IsEnableInertia="True" Margin="0,10,0,0">
+            <Border Height="2000" Margin="8,0">
+                <Border.Background>
+                    <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
+                        <GradientStop Color="White" Offset="0"/>
+                        <GradientStop Color="Black" Offset="1"/>
+                    </LinearGradientBrush>
+                </Border.Background>
+            </Border>
+        </controls:ScrollViewer>
+        <controls:GotoTop Animated="True" AutoHiding="True" AnimationTime="500" Target="{Binding ElementName=ScrollViewerDemo}" HorizontalAlignment="Right" VerticalAlignment="Bottom" Margin="0,0,20,20"/>
+    </Grid>
+</UserControl>
diff --git a/HandyControlDemo/UserControl/Controls/GotoTopDemoCtl.xaml.cs b/HandyControlDemo/UserControl/Controls/GotoTopDemoCtl.xaml.cs
new file mode 100644
index 00000000..3626a1df
--- /dev/null
+++ b/HandyControlDemo/UserControl/Controls/GotoTopDemoCtl.xaml.cs
@@ -0,0 +1,10 @@
+namespace HandyControlDemo.UserControl
+{
+    public partial class GotoTopDemoCtl
+    {
+        public GotoTopDemoCtl()
+        {
+            InitializeComponent();
+        }
+    }
+}
diff --git a/HandyControlDemo/UserControl/Main/LeftMainContent.xaml b/HandyControlDemo/UserControl/Main/LeftMainContent.xaml
index 766a7179..9828b9ef 100644
--- a/HandyControlDemo/UserControl/Main/LeftMainContent.xaml
+++ b/HandyControlDemo/UserControl/Main/LeftMainContent.xaml
@@ -188,6 +188,11 @@
                     </controls:StatusSwitchElement.CheckedElement>
                 </ToggleButton>
                 <ListBox Name="ListBoxControl" Grid.Column="0" Grid.ColumnSpan="2" Grid.Row="1" BorderThickness="0" SelectionMode="Single"  Style="{StaticResource ListBoxTransparent}">
+                    <ListBoxItem Style="{StaticResource ListBoxItemNew}" Tag="{x:Static data:MessageToken.GotoTopDemoCtl}" Content="{x:Static langs:Lang.GotoTop}">
+                        <controls:EdgeElement.LeftContent>
+                            <Image Source="../../Resources/Img/LeftMainContent/GoToTop_16x.png"/>
+                        </controls:EdgeElement.LeftContent>
+                    </ListBoxItem>
                     <ListBoxItem Style="{StaticResource ListBoxItemNew}" Tag="{x:Static data:MessageToken.ProgressButtonDemoCtl}" Content="{x:Static langs:Lang.ProgressButton}">
                         <controls:EdgeElement.LeftContent>
                             <Image Source="../../Resources/Img/LeftMainContent/ProgressButton_16x.png"/>
@@ -293,7 +298,7 @@
                             <Image Source="../../Resources/Img/LeftMainContent/Panel_16x.png"/>
                         </controls:EdgeElement.LeftContent>
                     </ListBoxItem>
-                    <ListBoxItem Style="{StaticResource ListBoxItemNew}" Tag="{x:Static data:MessageToken.CoverViewDemoCtl}" Content="{x:Static langs:Lang.CoverView}">
+                    <ListBoxItem Tag="{x:Static data:MessageToken.CoverViewDemoCtl}" Content="{x:Static langs:Lang.CoverView}">
                         <controls:EdgeElement.LeftContent>
                             <Image Source="../../Resources/Img/LeftMainContent/DetailDataView_16x.png"/>
                         </controls:EdgeElement.LeftContent>