feature: allow to disable auto-hide feature in ScrollBar (#1769)

Signed-off-by: leo <longshuang@msn.cn>

Author: love-linger

src/Resources/Locales/en_US.axaml

@@ -547,6 +547,7 @@
   <x:String x:Key="Text.Preferences.Appearance.OnlyUseMonoFontInEditor" xml:space="preserve">Use monospace font only in text editor</x:String>
   <x:String x:Key="Text.Preferences.Appearance.Theme" xml:space="preserve">Theme</x:String>
   <x:String x:Key="Text.Preferences.Appearance.ThemeOverrides" xml:space="preserve">Theme Overrides</x:String>
+  <x:String x:Key="Text.Preferences.Appearance.UseAutoHideScrollBars" xml:space="preserve">Use auto-hide scrollbars</x:String>
   <x:String x:Key="Text.Preferences.Appearance.UseFixedTabWidth" xml:space="preserve">Use fixed tab width in titlebar</x:String>
   <x:String x:Key="Text.Preferences.Appearance.UseNativeWindowFrame" xml:space="preserve">Use native window frame</x:String>
   <x:String x:Key="Text.Preferences.DiffMerge" xml:space="preserve">DIFF/MERGE TOOL</x:String>

src/Resources/Locales/zh_CN.axaml

@@ -551,6 +551,7 @@
   <x:String x:Key="Text.Preferences.Appearance.OnlyUseMonoFontInEditor" xml:space="preserve">仅在文本编辑器中使用等宽字体</x:String>
   <x:String x:Key="Text.Preferences.Appearance.Theme" xml:space="preserve">主题</x:String>
   <x:String x:Key="Text.Preferences.Appearance.ThemeOverrides" xml:space="preserve">主题自定义</x:String>
+  <x:String x:Key="Text.Preferences.Appearance.UseAutoHideScrollBars" xml:space="preserve">允许滚动条自动隐藏</x:String>
   <x:String x:Key="Text.Preferences.Appearance.UseFixedTabWidth" xml:space="preserve">主标签使用固定宽度</x:String>
   <x:String x:Key="Text.Preferences.Appearance.UseNativeWindowFrame" xml:space="preserve">使用系统默认窗体样式</x:String>
   <x:String x:Key="Text.Preferences.DiffMerge" xml:space="preserve">对比/合并工具</x:String>

src/Resources/Locales/zh_TW.axaml

@@ -551,6 +551,7 @@
   <x:String x:Key="Text.Preferences.Appearance.OnlyUseMonoFontInEditor" xml:space="preserve">僅在文字編輯器中使用等寬字型</x:String>
   <x:String x:Key="Text.Preferences.Appearance.Theme" xml:space="preserve">佈景主題</x:String>
   <x:String x:Key="Text.Preferences.Appearance.ThemeOverrides" xml:space="preserve">自訂主題</x:String>
+  <x:String x:Key="Text.Preferences.Appearance.UseAutoHideScrollBars" xml:space="preserve">允許滾動條自動隱藏</x:String>
   <x:String x:Key="Text.Preferences.Appearance.UseFixedTabWidth" xml:space="preserve">使用固定寬度的分頁標籤</x:String>
   <x:String x:Key="Text.Preferences.Appearance.UseNativeWindowFrame" xml:space="preserve">使用系統原生預設視窗樣式</x:String>
   <x:String x:Key="Text.Preferences.DiffMerge" xml:space="preserve">對比/合併工具</x:String>

src/Resources/Styles.axaml

@@ -17,6 +17,7 @@
       <x:Double x:Key="ScrollBarSize">12</x:Double>
     </Style.Resources>
 
+    <Setter Property="AllowAutoHide" Value="{Binding Source={x:Static vm:Preferences.Instance}, Path=UseAutoHideScrollBars, Mode=OneWay}"/>
     <Setter Property="ShowDelay" Value="0:0:0.1"/>
     <Setter Property="HideDelay" Value="0:0:0.2"/>
   </Style>

src/ViewModels/Preferences.cs

@@ -158,6 +158,12 @@ public bool UseFixedTabWidth
             set => SetProperty(ref _useFixedTabWidth, value);
         }
 
+        public bool UseAutoHideScrollBars
+        {
+            get => _useAutoHideScrollBars;
+            set => SetProperty(ref _useAutoHideScrollBars, value);
+        }
+
         public bool Check4UpdatesOnStartup
         {
             get => _check4UpdatesOnStartup;
@@ -706,6 +712,7 @@ private bool RemoveInvalidRepositoriesRecursive(List<RepositoryNode> collection)
         private int _maxHistoryCommits = 20000;
         private int _subjectGuideLength = 50;
         private bool _useFixedTabWidth = true;
+        private bool _useAutoHideScrollBars = true;
         private bool _showAuthorTimeInGraph = false;
         private bool _showChildren = false;
 

src/Views/Preferences.axaml

@@ -169,7 +169,7 @@
           <TabItem.Header>
             <TextBlock Classes="tab_header" Text="{DynamicResource Text.Preferences.Appearance}"/>
           </TabItem.Header>
-          <Grid Margin="8" RowDefinitions="32,32,32,32,32,32,32,32,Auto" ColumnDefinitions="Auto,*">
+          <Grid Margin="8" RowDefinitions="32,32,32,32,32,32,32,32,32,Auto" ColumnDefinitions="Auto,*">
             <TextBlock Grid.Row="0" Grid.Column="0"
                        Text="{DynamicResource Text.Preferences.Appearance.Theme}"
                        HorizontalAlignment="Right"
@@ -276,6 +276,11 @@
                       IsChecked="{Binding UseFixedTabWidth, Mode=TwoWay}"/>
 
             <CheckBox Grid.Row="8" Grid.Column="1"
+                      Height="32"
+                      Content="{DynamicResource Text.Preferences.Appearance.UseAutoHideScrollBars}"
+                      IsChecked="{Binding UseAutoHideScrollBars, Mode=TwoWay}"/>
+
+            <CheckBox Grid.Row="9" Grid.Column="1"
                       Height="32"
                       Content="{DynamicResource Text.Preferences.Appearance.UseNativeWindowFrame}"
                       IsChecked="{Binding UseSystemWindowFrame, Mode=OneTime}"