WPF Slider滑动条的颜色修改

效果如下：

鄙人虽然开发WPF有些时间，但之前一直是一些简单Template和Style改改之类的工作，并没有深入研究过。此次为了完成工作，首先也是网上搜了半天，没有找到合适的代码直接拷贝（搜索能力待提高），干脆就直接静下心来琢磨琢磨。

一开始在界面上就放了Slider，挠挠头，怎么修改Template才能达到效果呢？后来想到了Blend，之前一直听说很强大的界面设计工具，但是一直没有用过，就趁此机会就简单运用了一下。Blend中很牛逼的就是编辑模板，通过创建模板副本，可以看到Slider结构

结合代码发现，Thumb左右两边的ReapeatButton的宽度会随着Thumb的位置会变化。那问题就变得简单很多，修改左RepeatButton的Template就可以达到目的，核心代码如下。

       <Style x:Key="DecreaseBtn" TargetType="{x:Type RepeatButton}">
            <Setter Property="Template">
                <Setter.Value>
                    <ControlTemplate TargetType="{x:Type RepeatButton}">
                        <Border Background="{TemplateBinding Background}" 
                                Height="{TemplateBinding Height}" Width="{TemplateBinding Width}">
                            <!--轨迹，设置Background-->
                            <Border Margin="0,0,-1,0" Background="{StaticResource SliderThumb.Track.DecreaseBackground}" 
                                    VerticalAlignment="center" Height="4.0" />
                        </Border>
                    </ControlTemplate>
                </Setter.Value>
            </Setter>
        </Style>

完整代码(只是考虑水平的Slider)：

1 <ResourceDictionary xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  2                     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
  3     
  4     
  5     <SolidColorBrush x:Key="SliderThumb.Static.Foreground" Color="#FFE5E5E5"/>
  6     <SolidColorBrush x:Key="SliderThumb.MouseOver.Background" Color="Gray"/>
  7     <SolidColorBrush x:Key="SliderThumb.MouseOver.Border" Color="#FF7Eb4EA"/>
  8     <SolidColorBrush x:Key="SliderThumb.Pressed.Background" Color="Gray"/>
  9     <SolidColorBrush x:Key="SliderThumb.Pressed.Border" Color="Gray"/>
 10     <SolidColorBrush x:Key="SliderThumb.Disabled.Background" Color="#FFF0F0F0"/>
 11     <SolidColorBrush x:Key="SliderThumb.Disabled.Border" Color="#FFD9D9D9"/>
 12     <SolidColorBrush x:Key="SliderThumb.Static.Background" Color="#989898"/>
 13     
 14     <ControlTemplate x:Key="SliderThumbHorizontalTop" TargetType="{x:Type Thumb}">
 15         <Grid HorizontalAlignment="Center" UseLayoutRounding="True" VerticalAlignment="Center">
 16             <Path x:Name="grip" Data="M 0,6 C0,6 5.5,0 5.5,0 5.5,0 11,6 11,6 11,6 11,18 11,18 11,18 0,18 0,18 0,18 0,6 0,6 z" 
 17                   Fill="{StaticResource SliderThumb.Static.Background}" 
 18                   Stretch="Fill" SnapsToDevicePixels="True" 
 19                   Stroke="{Binding Path=Fill, RelativeSource={x:Static RelativeSource.Self}}" StrokeThickness="1" UseLayoutRounding="True" VerticalAlignment="Center"/>
 20         </Grid>
 21         <ControlTemplate.Triggers>
 22             <Trigger Property="IsMouseOver" Value="true">
 23                 <Setter Property="Fill" TargetName="grip" Value="{StaticResource SliderThumb.MouseOver.Background}"/>
 24                 <Setter Property="Stroke" TargetName="grip" Value="{StaticResource SliderThumb.MouseOver.Border}"/>
 25             </Trigger>
 26             <Trigger Property="IsDragging" Value="true">
 27                 <Setter Property="Fill" TargetName="grip" Value="{StaticResource SliderThumb.Pressed.Background}"/>
 28                 <Setter Property="Stroke" TargetName="grip" Value="{StaticResource SliderThumb.Pressed.Border}"/>
 29             </Trigger>
 30             <Trigger Property="IsEnabled" Value="false">
 31                 <Setter Property="Fill" TargetName="grip" Value="{StaticResource SliderThumb.Disabled.Background}"/>
 32                 <Setter Property="Stroke" TargetName="grip" Value="{StaticResource SliderThumb.Disabled.Border}"/>
 33             </Trigger>
 34         </ControlTemplate.Triggers>
 35     </ControlTemplate>
 36     <ControlTemplate x:Key="SliderThumbHorizontalBottom" TargetType="{x:Type Thumb}">
 37         <Grid HorizontalAlignment="Center" UseLayoutRounding="True" VerticalAlignment="Center">
 38             <Path x:Name="grip" Data="M 0,12 C0,12 5.5,18 5.5,18 5.5,18 11,12 11,12 11,12 11,0 11,0 11,0 0,0 0,0 0,0 0,12 0,12 z" 
 39                   Fill="{StaticResource SliderThumb.Static.Background}"
 40                   Stretch="Fill" 
 41                   SnapsToDevicePixels="True" 
 42                   Stroke="{Binding Path=Fill, RelativeSource={x:Static RelativeSource.Self}}" StrokeThickness="1" UseLayoutRounding="True" VerticalAlignment="Center"/>
 43         </Grid>
 44         <ControlTemplate.Triggers>
 45             <Trigger Property="IsMouseOver" Value="true">
 46                 <Setter Property="Fill" TargetName="grip" Value="{StaticResource SliderThumb.MouseOver.Background}"/>
 47                 <Setter Property="Stroke" TargetName="grip" Value="{StaticResource SliderThumb.MouseOver.Border}"/>
 48             </Trigger>
 49             <Trigger Property="IsDragging" Value="true">
 50                 <Setter Property="Fill" TargetName="grip" Value="{StaticResource SliderThumb.Pressed.Background}"/>
 51                 <Setter Property="Stroke" TargetName="grip" Value="{StaticResource SliderThumb.Pressed.Border}"/>
 52             </Trigger>
 53             <Trigger Property="IsEnabled" Value="false">
 54                 <Setter Property="Fill" TargetName="grip" Value="{StaticResource SliderThumb.Disabled.Background}"/>
 55                 <Setter Property="Stroke" TargetName="grip" Value="{StaticResource SliderThumb.Disabled.Border}"/>
 56             </Trigger>
 57         </ControlTemplate.Triggers>
 58     </ControlTemplate>
 59     <SolidColorBrush x:Key="SliderThumb.Track.Background" Color="#b6b6b6"/>
 60     <SolidColorBrush x:Key="SliderThumb.Track.DecreaseBackground" Color="#45db5e"/>
 61     <Style x:Key="RepeatButtonTransparent" TargetType="{x:Type RepeatButton}">
 62         <Setter Property="OverridesDefaultStyle" Value="true"/>
 63         <Setter Property="Background" Value="Transparent"/>
 64         <Setter Property="Focusable" Value="false"/>
 65         <Setter Property="IsTabStop" Value="false"/>
 66     </Style>
 67 
 68     <Style x:Key="DecreaseBtn" TargetType="{x:Type RepeatButton}" BasedOn="{StaticResource RepeatButtonTransparent}">
 69         <Setter Property="Template">
 70             <Setter.Value>
 71                 <ControlTemplate TargetType="{x:Type RepeatButton}">
 72                     <Border Background="{TemplateBinding Background}" Height="{TemplateBinding Height}" Width="{TemplateBinding Width}">
 73                         <Border Margin="1,0,-1,0" Background="{StaticResource SliderThumb.Track.DecreaseBackground}" 
 74                                 VerticalAlignment="center" Height="4.0" />
 75                     </Border>
 76                 </ControlTemplate>
 77             </Setter.Value>
 78         </Setter>
 79     </Style>
 80     
 81     <Style x:Key="IncreaseBtn" TargetType="{x:Type RepeatButton}" BasedOn="{StaticResource RepeatButtonTransparent}">
 82         <Setter Property="Template">
 83             <Setter.Value>
 84                 <ControlTemplate TargetType="{x:Type RepeatButton}">
 85                     <Border Background="{TemplateBinding Background}" Height="{TemplateBinding Height}" Width="{TemplateBinding Width}"/>
 86                 </ControlTemplate>
 87             </Setter.Value>
 88         </Setter>
 89     </Style>
 90     
 91     <ControlTemplate x:Key="SliderThumbHorizontalDefault" TargetType="{x:Type Thumb}">
 92         <Grid HorizontalAlignment="Center" UseLayoutRounding="True" VerticalAlignment="Center">
 93             <Path x:Name="grip" Data="M0 512C0 229.230208 229.805588 0 512 0 794.769792 0 1024 229.805588 1024 512 1024 794.769792 794.194412 1024 512 1024 229.230208 1024 0 794.194412 0 512Z" 
 94                       StrokeThickness="1" Fill="{StaticResource SliderThumb.Static.Background}" Stroke="{Binding Path=Fill, RelativeSource={x:Static RelativeSource.Self}}"
 95                       Width="18" Height="{Binding Path=Width, RelativeSource={x:Static RelativeSource.Self}}"
 96                       Stretch="Fill" SnapsToDevicePixels="True" UseLayoutRounding="True" VerticalAlignment="Center"/>
 97         </Grid>
 98         <ControlTemplate.Triggers>
 99             <Trigger Property="IsMouseOver" Value="true">
100                 <Setter Property="Fill" TargetName="grip" Value="{StaticResource SliderThumb.MouseOver.Background}"/>
101             </Trigger>
102             <Trigger Property="IsDragging" Value="true">
103                 <Setter Property="Fill" TargetName="grip" Value="{StaticResource SliderThumb.Pressed.Background}"/>
104                 <Setter Property="Stroke" TargetName="grip" Value="{StaticResource SliderThumb.Pressed.Border}"/>
105             </Trigger>
106             <Trigger Property="IsEnabled" Value="false">
107                 <Setter Property="Fill" TargetName="grip" Value="{StaticResource SliderThumb.Disabled.Background}"/>
108                 <Setter Property="Stroke" TargetName="grip" Value="{StaticResource SliderThumb.Disabled.Border}"/>
109             </Trigger>
110         </ControlTemplate.Triggers>
111     </ControlTemplate>
112 
113     <ControlTemplate x:Key="SliderHorizontal" TargetType="{x:Type Slider}">
114         <Border x:Name="border" BorderBrush="{TemplateBinding BorderBrush}" 
115                     BorderThickness="{TemplateBinding BorderThickness}" Background="{TemplateBinding Background}" SnapsToDevicePixels="True">
116             <Grid>
117                 <Grid.RowDefinitions>
118                     <RowDefinition Height="15"/>
119                     <RowDefinition Height="Auto" MinHeight="{TemplateBinding MinHeight}"/>
120                     <RowDefinition Height="15"/>
121                 </Grid.RowDefinitions>
122                 <TickBar x:Name="TopTick" Fill="{TemplateBinding Foreground}" Height="4" Margin="0,0,0,2" Placement="Top" Grid.Row="0" 
123                              Visibility="Collapsed"/>
124                 <TickBar x:Name="BottomTick" Fill="{TemplateBinding Foreground}" Height="4" Margin="0,2,0,0" Placement="Bottom" Grid.Row="2" 
125                              Visibility="Collapsed"/>
126 
127                 <Border x:Name="TrackBackground" BorderBrush="{StaticResource SliderThumb.Track.Background}" 
128                         BorderThickness="1" Background="{Binding Path=BorderBrush, RelativeSource={x:Static RelativeSource.Self}}" 
129                         Height="4.0" Margin="5,0" Grid.Row="1" VerticalAlignment="center">
130                     <Canvas HorizontalAlignment="Stretch" Margin="0,-1">
131                         <Rectangle x:Name="PART_SelectionRange" Fill="{DynamicResource {x:Static SystemColors.HighlightBrushKey}}"
132                                    Height="{Binding Path=Height, ElementName=TrackBackground}" Visibility="Hidden"/>
133                     </Canvas>
134                 </Border>
135                 <Track x:Name="PART_Track" Grid.Row="1">
136                     <Track.DecreaseRepeatButton>
137                         <RepeatButton Command="{x:Static Slider.DecreaseLarge}" Style="{StaticResource DecreaseBtn}"/>
138                     </Track.DecreaseRepeatButton>
139                     <Track.IncreaseRepeatButton>
140                         <RepeatButton Command="{x:Static Slider.IncreaseLarge}" Style="{StaticResource IncreaseBtn}"/>
141                     </Track.IncreaseRepeatButton>
142                     <Track.Thumb>
143                         <Thumb x:Name="Thumb" Focusable="False" Height="20" OverridesDefaultStyle="True" 
144                                Template="{StaticResource SliderThumbHorizontalDefault}" VerticalAlignment="Center" 
145                                Width="{Binding Path=Height, RelativeSource={x:Static RelativeSource.Self}}"/>
146                     </Track.Thumb>
147                 </Track>
148             </Grid>
149         </Border>
150         <ControlTemplate.Triggers>
151             <Trigger Property="TickPlacement" Value="TopLeft">
152                 <Setter Property="Visibility" TargetName="TopTick" Value="Visible"/>
153                 <Setter Property="Template" TargetName="Thumb" Value="{StaticResource SliderThumbHorizontalTop}"/>
154                 <Setter Property="Margin" TargetName="TrackBackground" Value="5,2,5,0"/>
155             </Trigger>
156             <Trigger Property="TickPlacement" Value="BottomRight">
157                 <Setter Property="Visibility" TargetName="BottomTick" Value="Visible"/>
158                 <Setter Property="Template" TargetName="Thumb" Value="{StaticResource SliderThumbHorizontalBottom}"/>
159                 <Setter Property="Margin" TargetName="TrackBackground" Value="5,0,5,2"/>
160             </Trigger>
161             <Trigger Property="TickPlacement" Value="Both">
162                 <Setter Property="Visibility" TargetName="TopTick" Value="Visible"/>
163                 <Setter Property="Visibility" TargetName="BottomTick" Value="Visible"/>
164             </Trigger>
165             <Trigger Property="IsSelectionRangeEnabled" Value="true">
166                 <Setter Property="Visibility" TargetName="PART_SelectionRange" Value="Visible"/>
167             </Trigger>
168         </ControlTemplate.Triggers>
169     </ControlTemplate>
170 
171     <Style x:Key="SliderStyle" TargetType="{x:Type Slider}">
172         <Setter Property="Stylus.IsPressAndHoldEnabled" Value="false"/>
173         <Setter Property="Background" Value="Transparent"/>
174         <Setter Property="BorderBrush" Value="Transparent"/>
175         <Setter Property="Template" Value="{StaticResource SliderHorizontal}"/>
176     </Style>
177 </ResourceDictionary>

其实最重要的还是控件的结构，只要对此很熟悉，做出理想的控件应该不难。