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将文本块调整为动态更改宽度的按钮

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R4cOOn · 技术社区 · 15 年前

我有一个 TextBlock 在一个 Button 在一个 Grid . 我想展示一下:

"some very long text" <-- text "that doesn't fit" <-- text wrapped [my button text size] <-- button

但是,我得到的是:

"some very long text that doesn't fit" <-- text [my button text size] <-- button

我的问题是 纽扣 通过本地化资源动态设置,因此按钮的宽度会动态更改。

适用于非动态的静态解决方案 纽扣 调整大小为:

                <TextBlock
                    Margin="5"
                    TextWrapping="Wrap"
                    Width="{Binding ElementName=requestDemoButton, Path=RenderSize.Width}"
                    Text="{Binding Path=Resource.Text, Source={StaticResource LocalizedStrings }}"
                    />
                <Button 
                    x:Name="requestDemoButton"
                    Margin="5" 
                    Height="Auto" 
                    Width="Auto" 
                    HorizontalAlignment="Right"
                    Content="{Binding Path=Resource.Button, Source={StaticResource LocalizedStrings }}" />

想法,任何人?我目前正在考虑将一个行为类粘贴到 控件 它倾听 SizeChanged 事件上 纽扣 . 我想有一个内置的解决方案,如果它存在的话。

1 回复 | 直到 14 年前

R4cOOn 15 年前

如果有人感兴趣,下面是我在行为方面的表现。我传递 Height 或 Width 根据我想要绑定的属性。

这是课程:

public static class DynamicControlResizeBehavior
{
    public static readonly DependencyProperty TargetProperty =
        DependencyProperty.RegisterAttached("Target", typeof(FrameworkElement), typeof(DynamicControlResizeBehavior), new PropertyMetadata(OnTargetSetCallback));

    public static readonly DependencyProperty PropertyNameProperty =
        DependencyProperty.RegisterAttached("PropertyName", typeof(string), typeof(DynamicControlResizeBehavior), new PropertyMetadata(OnPropertyNameSetCallback));


    public static string GetPropertyName(DependencyObject obj)
    {
        return (string)obj.GetValue(PropertyNameProperty);
    }

    public static void SetPropertyName(DependencyObject obj, string value)
    {
        obj.SetValue(PropertyNameProperty, value);
    }

    public static FrameworkElement GetTarget(DependencyObject obj)
    {
        return (FrameworkElement)obj.GetValue(TargetProperty);
    }

    public static void SetTarget(DependencyObject obj, FrameworkElement value)
    {
        obj.SetValue(TargetProperty, value);
    }

    private static void SynchronizeProperty(DependencyObject dependencyObject)
    {
        var target = GetTarget(dependencyObject);
        if (target != null)
        {
            var propertyName = GetPropertyName(dependencyObject);

            DependencyProperty dependencyToRead;
            DependencyProperty dependencyToWrite;
            if (string.Equals(propertyName, "Width", StringComparison.InvariantCulture))
            {
                dependencyToRead = FrameworkElement.ActualWidthProperty;
                dependencyToWrite = FrameworkElement.WidthProperty;
            }
            else if (string.Equals(propertyName, "Height", StringComparison.InvariantCulture))
            {
                dependencyToRead = FrameworkElement.ActualHeightProperty;
                dependencyToWrite = FrameworkElement.HeightProperty;
            }
            else
            {
                return;
            }

            var propertySize = (double)target.GetValue(dependencyToRead);
            dependencyObject.SetValue(dependencyToWrite, propertySize);
        }
    }

    private static void OnTargetSetCallback(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        var oldElement = e.OldValue as FrameworkElement;
        if (oldElement != null)
        {
            oldElement.SizeChanged -= (o, s) => SynchronizeProperty(d);
        }

        var newElement = e.NewValue as FrameworkElement;
        if (newElement != null)
        {
            newElement.SizeChanged += (o, s) => SynchronizeProperty(d);
        }
    }

    private static void OnPropertyNameSetCallback(DependencyObject d, DependencyPropertyChangedEventArgs e)
    {
        SynchronizeProperty(d);
    }
}

使用方法如下:

            <TextBlock
                Behaviors:DynamicControlResizeBehavior.Target="{Binding ElementName=submitButton}"
                Behaviors:DynamicControlResizeBehavior.PropertyName="Width"
                HorizontalAlignment="Right"
                Margin="5,20,5,5"
                TextWrapping="Wrap"
                Text="{Binding Path=Resource.RequestDemoLoginText, Source={StaticResource LocalizedStrings }}"
                />
            <Button 
                x:Name="submitButton"
                Margin="5" 
                Height="Auto" 
                Width="Auto" 
                HorizontalAlignment="Right"
                HorizontalContentAlignment="Left"
                Content="{Binding Path=Resource.RequestDemoLogin, Source={StaticResource LocalizedStrings }}" />

希望能帮助别人。