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问XAML样式/基类中VisualStateGroup / VisualState的继承
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Stack Overflow用户

提问于 2018-07-09 13:06:13

回答 2查看 1K关注 0票数 2

我有一个基类SecurePage，它继承了UserControl。
应用程序中的每一个“页面”都是从SecurePage继承的。
我想在默认的Style of SecurePage中定义一个带有一些VisualState的VisualStateGroup。

问题是，在派生类中，这些VisualState**s都不可用。

var states = VisualStateManager.GetVisualStateGroups(this);

返回空列表。

如果我复制我的XAML VisualState定义并将其粘贴到我的DerivadedFooSecurePage中，我可以轻松地进入状态：

VisualStateManager.GoToState(this, "Blink", false);

与这里描述的问题相同：VisualState in abstract control

更多的细节

SecurePage

[TemplateVisualState(GroupName = "State", Name = "Normal")]
[TemplateVisualState(GroupName = "State", Name = "Blink")]
public class SecurePage: UserControl
{
    public SecurePage()
    {
        DefaultStyleKey = typeof(HtSecurePage);
    }
}

<Style TargetType="basic:SecurePage">
    <Setter Property="FontSize" Value="14"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="basic:SecurePage">
                <Grid>
                    <VisualStateManager.VisualStateGroups>
                        <VisualStateGroup x:Name="Signals">
                            <VisualState x:Name="Normal"/>
                            <VisualState x:Name="Blink">
                                <Storyboard>
                                    <ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Border.BorderBrush).(SolidColorBrush.Color)" Storyboard.TargetName="border">
                                        <EasingColorKeyFrame KeyTime="0:0:0.4" Value="#FF3AFF00">
                                            <EasingColorKeyFrame.EasingFunction>
                                                <BounceEase EasingMode="EaseIn" Bounciness="3" Bounces="4"/>
                                            </EasingColorKeyFrame.EasingFunction>
                                        </EasingColorKeyFrame>
                                    </ColorAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                        </VisualStateGroup>
                    </VisualStateManager.VisualStateGroups>
                    <ContentPresenter Content="{TemplateBinding Content}"/>
                    <Border 
                        x:Name="border"
                        BorderThickness="5"
                        BorderBrush="Transparent"
                        IsHitTestVisible="False"/>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

InfoPage

Info.xaml.cs

namespace Views.General
{
    public partial class Info
    {
        public Info()
        {
            InitializeComponent();
        }
    }
}

Info.xaml

<basic:SecurePage
    x:Class="Views.General.Info"
    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" 
    xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
    xmlns:basic="clr-namespace:Foo.PlcFramework.Controls.Basic;assembly=Foo"
    FontSize="14">
    <Grid>
        <TextBlock Text="HelloWorld"/>
    </Grid>
</basic:SecurePage>

现场调试

states = 0
调用VisualStateManager.GoToState(this, "Blink", false);后什么都不会发生

states = 0
调用VisualStateManager.GoToState(this, "Blink", false);后什么都不会发生

将VisualState复制到派生类中

namespace Views.General
{
    [TemplateVisualState(GroupName = "State", Name = "Normal")]
    [TemplateVisualState(GroupName = "State", Name = "Blink")]
    public partial class Info
    {
        public Info()
        {
            InitializeComponent();
            var states = VisualStateManager.GetVisualStateGroups(this);
            VisualStateManager.GoToState(this, "Blink", false);
        }
    }
}

<basic:SecurePage 
    x:Class="Views.General.Info"
    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" 
    xmlns:i="http://schemas.microsoft.com/expression/2010/interactivity"
    xmlns:basic="clr-namespace:Foo.PlcFramework.Controls.Basic;assembly=Foo"
    FontSize="14">
    <Grid>
        <VisualStateManager.VisualStateGroups>
            <VisualStateGroup x:Name="Signals">
                <VisualState x:Name="Normal"/>
                <VisualState x:Name="Blink">
                    <Storyboard>
                        <ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Border.BorderBrush).(SolidColorBrush.Color)" Storyboard.TargetName="border">
                            <EasingColorKeyFrame KeyTime="0:0:0.4" Value="#FF3AFF00">
                                <EasingColorKeyFrame.EasingFunction>
                                    <BounceEase EasingMode="EaseIn" Bounciness="3" Bounces="4"/>
                                </EasingColorKeyFrame.EasingFunction>
                            </EasingColorKeyFrame>
                        </ColorAnimationUsingKeyFrames>
                    </Storyboard>
                </VisualState>
            </VisualStateGroup>
        </VisualStateManager.VisualStateGroups>
        <TextBlock Text="HelloWorld"/>
        <Border 
            x:Name="border"
            BorderThickness="5"
            BorderBrush="Transparent"
            IsHitTestVisible="False"/>
    </Grid>
</basic:SecurePage >

states = 0
在调用VisualStateManager.GoToState(this, "Blink", false); 之后，状态发生了更改！！

我只想在XAML Style SecurePage 的定义中定义状态，然后在任何派生类中进入状态！

wpf

xaml

expression-blend

visualstatemanager

回答 2

Stack Overflow用户

发布于 2018-07-12 07:21:35

我很想重新生成您刚才提到的场景，并且我能够从基类中获得VisualStateGroup列表。下面是我实现的示例。

首先，您需要获得当前基类的VisualStateGroup，然后向它添加自定义创建的组。

基类

public partial class SecurePage : UserControl
{
    public VisualStateGroup vsGroup = new VisualStateGroup();

    public SecurePage()
    {
        System.Collections.IList groups = VisualStateManager.GetVisualStateGroups(this);


        VisualState state1 = new VisualState() { Name = "State1" };

        Storyboard sb = new Storyboard();
        DoubleAnimation anim = new DoubleAnimation(1, 0, TimeSpan.FromSeconds(1.0));
        Storyboard.SetTargetProperty(anim, new PropertyPath(FrameworkElement.OpacityProperty));
        sb.AutoReverse = true;
        sb.Children.Add(anim);

        state1.Storyboard = sb;

        vsGroup.States.Add(state1);

        groups.Add(vsGroup);
    }
}

派生类

派生类的根是基类的类型。记住，要不断地改变这种状况。XAML文件的第一行。检查下面。

<UserControl x:Class="WPFTest.SecurePage"
      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" 
      xmlns:local="clr-namespace:WPFTest"
      mc:Ignorable="d" 
      d:DesignHeight="300" d:DesignWidth="300">

    <Grid>
        <Rectangle x:Name="rect" Height="100" Width="100" Fill="Red" HorizontalAlignment="Center" VerticalAlignment="Center"/>
    </Grid>
</UserControl>

public partial class DerivadedFooSecurePage : SecurePage
{
    public DerivadedFooSecurePage()
    {
        InitializeComponent();

        var states = VisualStateManager.GetVisualStateGroups(this);

        //VisualStateManager.GoToElementState(this.rect, "State1", false);
    }
}

更进一步，可以在任何窗口或其他用户控件上实现DerivadedFooSecurePage。

票数 0

Stack Overflow用户

发布于 2018-07-12 10:19:11

变通解决方案

我为每个可用的enum定义了一个值。

public enum ESecurePageVisualState
{
    Normal,
    Blink
}

在DependencyProperty类中添加了一个SecurePage。

/// <summary>
/// Set the visual State of the page
/// </summary>
public ESecurePageVisualState VisualState
{
    get => (ESecurePageVisualState)GetValue(VisualStateProperty);
    set => SetValue(VisualStateProperty, value);
}

/// <summary>
/// The <see cref="VisualState"/> DependencyProperty.
/// </summary>
public static readonly DependencyProperty VisualStateProperty = DependencyProperty.Register("VisualState", typeof(ESecurePageVisualState), typeof(SecurePage), new PropertyMetadata(ESecurePageVisualState.Normal));

并更改了Style的SecurePage

<Style TargetType="basic:SecurePage">
    <Setter Property="FontSize" Value="14"/>
    <Setter Property="Template">
        <Setter.Value>
            <ControlTemplate TargetType="basic:SecurePage">
                <Grid x:Name="Grid">
                    <VisualStateManager.VisualStateGroups>
                        <VisualStateGroup x:Name="Signals">
                            <VisualState x:Name="Normal"/>
                            <VisualState x:Name="Blink">
                                <Storyboard>
                                    <ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(Border.BorderBrush).(SolidColorBrush.Color)" Storyboard.TargetName="border">
                                        <EasingColorKeyFrame KeyTime="0:0:0.4" Value="#FF3AFF00">
                                            <EasingColorKeyFrame.EasingFunction>
                                                <BounceEase EasingMode="EaseIn" Bounciness="3" Bounces="4"/>
                                            </EasingColorKeyFrame.EasingFunction>
                                        </EasingColorKeyFrame>
                                    </ColorAnimationUsingKeyFrames>
                                </Storyboard>
                            </VisualState>
                        </VisualStateGroup>
                    </VisualStateManager.VisualStateGroups>
                    <ContentPresenter Content="{TemplateBinding Content}"/>
                    <Border 
                        x:Name="border"
                        BorderThickness="5"
                        BorderBrush="Transparent"
                        IsHitTestVisible="False"/>
                    <i:Interaction.Triggers>                            
                        <ei:DataTrigger Binding="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=basic:SecurePage}, Path=VisualState}" Value="{x:Static basic:ESecurePageVisualState.Normal}">
                            <ei:GoToStateAction StateName="Normal" TargetName="Grid" TargetObject="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=Grid}}"/>
                        </ei:DataTrigger>
                        <ei:DataTrigger Binding="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=basic:SecurePage}, Path=VisualState}" Value="{x:Static basic:ESecurePageVisualState.Blink}">
                            <ei:GoToStateAction StateName="Blink" TargetName="Grid" TargetObject="{Binding RelativeSource={RelativeSource Mode=FindAncestor, AncestorType=Grid}}"/>
                        </ei:DataTrigger>
                    </i:Interaction.Triggers>
                </Grid>
            </ControlTemplate>
        </Setter.Value>
    </Setter>
</Style>

现在，我可以通过属性更改VisualState。

public partial class Info
{
    public Info()
    {
        InitializeComponent();
        Loaded += (sender, args) =>
        {
            VisualState = ESecurePageVisualState.Blink;
        };
    }       
}

如果你找到更好的解决办法，告诉我！

票数 0

页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持

原文链接：

https://stackoverflow.com/questions/51246313

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