Question

我想知道是否有人知道Blend / Silverlight 4的任何好（免费）行为

具体来说，我正在寻找一种可以放在TextBlock上的行为使其水平滚动或将“闪烁”文本块中的文本（闪烁文本）的行为。但我很想知道你一直在使用或了解的任何行为。

作为一个例子，我有一个非常基本的“闪烁文本”行为

public class FlashTextBehavior : Behavior<TextBlock>
{
    Timer flashTimer;

    public FlashTextBehavior()
    {

    }

    protected override void OnAttached()
    {
        base.OnAttached();
        flashTimer = new Timer(new TimerCallback((o) => 
        {
            Dispatcher.BeginInvoke(() =>
            {
                if (AssociatedObject.Visibility == Visibility.Visible)
                    AssociatedObject.Visibility = Visibility.Collapsed;
                else
                    AssociatedObject.Visibility = Visibility.Visible;
            });               
        }), null, 0, 750);
    }

    protected override void OnDetaching()
    {
        if (flashTimer != null)
            flashTimer.Dispose();

        base.OnDetaching();
    }
}

当然可以改进，但我真的对其他什么感兴趣人们想出了。

Answer 1

为了滚动文本块我推荐以下内容，因为translatetransform和clip不是那么顺利，让我们在xaml中添加：

<ScrollViewer Margin="40" Width="100"  VerticalAlignment="Top" HorizontalAlignment="Left" VerticalScrollBarVisibility="Hidden" HorizontalScrollBarVisibility="Hidden" HorizontalScrollMode="Enabled">
        <i:Interaction.Behaviors>
            <behaviors:ScrollHorizontalBehavior/>
        </i:Interaction.Behaviors>
        <TextBlock Foreground="White" Text="asdfasdfasdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf HALF asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf LAST" >
        </TextBlock>
    </ScrollViewer>

现在是转换器：

public class ScrollHorizontalBehavior : DependencyObject, IBehavior
{
    public DependencyObject AssociatedObject { get; private set; }

    public void Attach(DependencyObject associatedObject)
    {
        AssociatedObject = associatedObject;
        InitializeTranslation();
    }

    private DispatcherTimer UITimer { get; set; }
    private void InitializeTranslation()
    {
        var element = AssociatedObject as ScrollViewer;
        UITimer = new DispatcherTimer() { Interval = TimeSpan.FromMilliseconds(30) };
        UITimer.Tick += (s, e) =>
        {
            var newvalue = element.HorizontalOffset + 20;
            if (newvalue > element.ScrollableWidth)
                newvalue = 0;
            element.ChangeView(newvalue, null, null);
        };
        UITimer.Start();
    }

    public void Detach()
    {
        if (UITimer != null) UITimer.Stop();
    }
}

正如你所看到的那样，你可以管理在滚动结束时要做的事情。

现在添加闪烁行为

  <TextBlock Foreground="White" Text="asdfasdfasdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf HALF asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf asdf LAST" >
             <i:Interaction.Behaviors>
            <behaviors:BlinkingBehavior/>
        </i:Interaction.Behaviors>
  </TextBlock>

行为更容易：

public class BlinkingBehavior : DependencyObject, IBehavior
{
    public DependencyObject AssociatedObject { get; private set; }

    public void Attach(DependencyObject associatedObject)
    {
        AssociatedObject = associatedObject;
        InitializeBlinking();
    }

    bool firstcolor = true;
    private void InitializeBlinking()
    {
        var element = AssociatedObject as TextBlock;

        var brushA = new SolidColorBrush(Colors.Red);
        var brushB = new SolidColorBrush(Colors.White);

        UITimer = new DispatcherTimer() { Interval = TimeSpan.FromMilliseconds(1000) };
        UITimer.Tick += (s, e) =>
        {
            element.Foreground = firstcolor ? brushA : brushB;
            firstcolor = !firstcolor;
        };
        UITimer.Start();
    }

    private DispatcherTimer UITimer { get; set; }

    public void Detach()
    {
        if (UITimer != null) UITimer.Stop();
    }
}

注意：我是为Windows 10做的，所以在你的情况下可能会有所改变。它需要我做一点，所以如果你发现它真的很有用，那么标记为答案。

混合行为（Silverlight 4）

1 个答案: