wpf - 如何为 SolidColorBrush 资源设置动画?
问题描述
我正在尝试为 SolidColorBrush 设置动画,这是我的自定义控件的资源。此画笔用作五个矩形的填充。
在设计时,一切都按预期工作,但在运行时应用程序立即关闭并出现 System.InvalidOperationException,指出找不到画笔的名称。
我开始了一个示例项目,具有:
- 1个画笔,我想制作动画
<SolidColorBrush x:Name="rectBrush" x:Key="rectangleBrush" Color="#b266b2" />
- 5个矩形,用那个画笔填充。
<Grid>
<StackPanel
Orientation="Horizontal"
VerticalAlignment="Center"
HorizontalAlignment="Center">
<Rectangle
Fill="{StaticResource rectangleBrush}" />
<Rectangle
Fill="{StaticResource rectangleBrush}" />
<Rectangle
Fill="{StaticResource rectangleBrush}" />
<Rectangle
Fill="{StaticResource rectangleBrush}" />
<Rectangle
Fill="{StaticResource rectangleBrush}" />
</StackPanel>
</Grid>
我正在使用 Blend for Visual Studio 来查看情节提要是否正确且有效。
启动时我得到:
System.InvalidOperationException:在“AnimationExample.MainWindow”的名称范围内找不到“rectBrush”名称
完整的 XAML 标记:
<Window x:Class="AnimationExample.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
mc:Ignorable="d"
d:DesignHeight="200" d:DesignWidth="200">
<Window.Resources>
<SolidColorBrush x:Name="rectBrush" x:Key="rectangleBrush" Color="#b266b2" />
<Style TargetType="Rectangle">
<Setter Property="Width" Value="6" />
<Setter Property="Height" Value="6" />
<Setter Property="Margin" Value="1" />
<Setter Property="HorizontalAlignment" Value="Left" />
<Setter Property="VerticalAlignment" Value="Bottom" />
<Setter Property="RadiusX" Value="3" />
<Setter Property="RadiusY" Value="3" />
</Style>
<Storyboard
x:Key="NowPlayingAnimation"
RepeatBehavior="Forever"
AutoReverse="True">
<ColorAnimation
Storyboard.TargetName="rectBrush"
Storyboard.TargetProperty="Color"
From="#b266b2"
To="#6666ff"
Duration="0:0:1" />
<ColorAnimation
Storyboard.TargetName="rectBrush"
Storyboard.TargetProperty="Color"
From="#6666ff"
To="#66b266"
Duration="0:0:1"
BeginTime="0:0:1"/>
<ColorAnimation
Storyboard.TargetName="rectBrush"
Storyboard.TargetProperty="Color"
From="#66b266"
To="#ffff66"
Duration="0:0:1"
BeginTime="0:0:2"/>
<ColorAnimation
Storyboard.TargetName="rectBrush"
Storyboard.TargetProperty="Color"
From="#ffff66"
To="#ffc966"
Duration="0:0:1"
BeginTime="0:0:3" />
<ColorAnimation
Storyboard.TargetName="rectBrush"
Storyboard.TargetProperty="Color"
From="#ffc966"
To="#ff4c4c"
Duration="0:0:1"
BeginTime="0:0:4" />
</Storyboard>
</Window.Resources>
<Window.Triggers>
<EventTrigger RoutedEvent="FrameworkElement.Loaded">
<BeginStoryboard Storyboard="{StaticResource NowPlayingAnimation}"/>
</EventTrigger>
</Window.Triggers>
<Grid>
<StackPanel Orientation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center">
<Rectangle Fill="{StaticResource rectangleBrush}" />
<Rectangle Fill="{StaticResource rectangleBrush}" />
<Rectangle Fill="{StaticResource rectangleBrush}" />
<Rectangle Fill="{StaticResource rectangleBrush}" />
<Rectangle Fill="{StaticResource rectangleBrush}" />
</StackPanel>
</Grid>
</Window>
我有两个问题:
为什么在设计时一切正常,我能够看到我真正想要得到的东西?
有没有办法做到这一点?
- 完全在 XAML 中;
- 不单独为每个矩形的填充设置动画?
先感谢您。
解决方案
你有两个选择:
- 将动画放在Style中,直接进行动画
Background.Color
。 - 将画笔放在它或其父级在可视树中可以解析名称的位置。
版本 2:
<Window.Resources>
<SolidColorBrush x:Name="rectBrush" x:Key="rectangleBrush" Color="#b266b2" />
<Style TargetType="Rectangle">
<Setter Property="Width" Value="6" />
<Setter Property="Height" Value="6" />
<Setter Property="Margin" Value="1" />
<Setter Property="HorizontalAlignment" Value="Left" />
<Setter Property="VerticalAlignment" Value="Bottom" />
<Setter Property="RadiusX" Value="3" />
<Setter Property="RadiusY" Value="3" />
</Style>
<Storyboard
x:Key="NowPlayingAnimation"
RepeatBehavior="Forever"
AutoReverse="True">
<ColorAnimation
Storyboard.TargetName="BrushCarrier"
Storyboard.TargetProperty="Tag.Color"
From="#b266b2"
To="#6666ff"
Duration="0:0:1" />
<ColorAnimation
Storyboard.TargetName="BrushCarrier"
Storyboard.TargetProperty="Tag.Color"
From="#6666ff"
To="#66b266"
Duration="0:0:1"
BeginTime="0:0:1"/>
<ColorAnimation
Storyboard.TargetName="BrushCarrier"
Storyboard.TargetProperty="Tag.Color"
From="#66b266"
To="#ffff66"
Duration="0:0:1"
BeginTime="0:0:2"/>
<ColorAnimation
Storyboard.TargetName="BrushCarrier"
Storyboard.TargetProperty="Tag.Color"
From="#ffff66"
To="#ffc966"
Duration="0:0:1"
BeginTime="0:0:3" />
<ColorAnimation
Storyboard.TargetName="BrushCarrier"
Storyboard.TargetProperty="Tag.Color"
From="#ffc966"
To="#ff4c4c"
Duration="0:0:1"
BeginTime="0:0:4" />
</Storyboard>
</Window.Resources>
<Window.Triggers>
<EventTrigger RoutedEvent="FrameworkElement.Loaded">
<BeginStoryboard Storyboard="{StaticResource NowPlayingAnimation}"/>
</EventTrigger>
</Window.Triggers>
<Grid>
<FrameworkElement
x:Name="BrushCarrier"
Tag="{StaticResource rectangleBrush}"
/>
<StackPanel Orientation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center">
<Rectangle Fill="{StaticResource rectangleBrush}" />
<Rectangle Fill="{StaticResource rectangleBrush}" />
<Rectangle Fill="{StaticResource rectangleBrush}" />
<Rectangle Fill="{StaticResource rectangleBrush}" />
<Rectangle Fill="{StaticResource rectangleBrush}" />
</StackPanel>
</Grid>
版本 1。在这里,情节提要没有被定义为资源,并且您不会在加载窗口时启动它。每个 Rectangle 都负责自己的动画。
<Style TargetType="Rectangle" x:Key="ColorShiftRectangle">
<Setter Property="Width" Value="6" />
<Setter Property="Height" Value="6" />
<Setter Property="Margin" Value="1" />
<Setter Property="HorizontalAlignment" Value="Left" />
<Setter Property="VerticalAlignment" Value="Bottom" />
<Setter Property="RadiusX" Value="3" />
<Setter Property="RadiusY" Value="3" />
<Setter Property="Fill" Value="#b266b2" />
<Style.Triggers>
<EventTrigger RoutedEvent="Loaded">
<BeginStoryboard>
<Storyboard
RepeatBehavior="Forever"
AutoReverse="True">
<ColorAnimation
Storyboard.TargetProperty="Fill.Color"
From="#b266b2"
To="#6666ff"
Duration="0:0:1" />
<ColorAnimation
Storyboard.TargetProperty="Fill.Color"
From="#6666ff"
To="#66b266"
Duration="0:0:1"
BeginTime="0:0:1"/>
<ColorAnimation
Storyboard.TargetProperty="Fill.Color"
From="#66b266"
To="#ffff66"
Duration="0:0:1"
BeginTime="0:0:2"/>
<ColorAnimation
Storyboard.TargetProperty="Fill.Color"
From="#ffff66"
To="#ffc966"
Duration="0:0:1"
BeginTime="0:0:3" />
<ColorAnimation
Storyboard.TargetProperty="Fill.Color"
From="#ffc966"
To="#ff4c4c"
Duration="0:0:1"
BeginTime="0:0:4" />
</Storyboard>
</BeginStoryboard>
</EventTrigger>
</Style.Triggers>
</Style>
用法:
<Rectangle Style="{StaticResource ColorShiftRectangle}" />
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