时间：2019-03-08 标签：c#wpftextblock

Question

我需要在文本块的字母之间给出 space 作为 34。
文本块有属性和 Font-Stretch 属性
但它有自己的（超扩展，浓缩，......等等）

       <Style x:Key="diningcode" TargetType="TextBlock">


            <Setter Property="FontStretch" Value="UltraExpanded"/>

        </Style>

我想把这个'ultraExpanded'属性改成34 有什么解决办法吗？

Answer 1

我相信你可以自己尝试找出答案，但显然你不能评估 -10 到 FontStretch 属性因为属性只接受一个选项集合作为输入值。您要查找的选项可能是 FontStretches.ExtraCondensed。建议你去MSDN阅读：https://msdn.microsoft.com/en-us/library/system.windows.fontstretches.extracondensed(v=vs.110).aspx

Answer 2

你可以试试这个：

public class AdvancedStretchTextBlock : TextBlock
{
    /// <summary>
    /// Defines charachter/letter spacing
    /// </summary>
    public int Tracking
    {
        get => (int)GetValue(TrackingProperty);
        set => SetValue(TrackingProperty, value);
    }

    public static readonly DependencyProperty TrackingProperty =
        DependencyProperty.Register("Tracking", typeof(int), typeof(AdvancedStretchTextBlock),
            new UIPropertyMetadata(0,
                TrackingPropertyChanged));

    static void TrackingPropertyChanged(DependencyObject o, DependencyPropertyChangedEventArgs e)
    {
        if (!(o is AdvancedStretchTextBlock tb) || String.IsNullOrEmpty(tb.Text))
            return;

        tb._tracking.X = (int)e.NewValue;
        tb._trackingAlignment.X = -(int)e.NewValue * tb.Text.Length;

        if (tb._lastTrackingTextLength == tb.Text.Length)
            return; // Avoid re-creating effects when you don't have to..

        // Remove unused effects (string has shortened)
        while (tb._trackingEffects.Count > tb.Text.Length)
        {
            tb.TextEffects.Remove(tb._trackingEffects[tb._trackingEffects.Count - 1]);
            tb._trackingEffects.RemoveAt(tb._trackingEffects.Count - 1);
        }

        tb._lastTrackingTextLength = tb.Text.Length;

        // Add missing effects (string has grown)
        for (int i = tb._trackingEffects.Count; i < tb.Text.Length; i++)
        {
            var fx = new TextEffect()
            {
                PositionCount = i,
                Transform = tb._tracking
            };
            tb._trackingEffects.Add(fx);
            tb.TextEffects.Add(fx);
        }

        // Ugly hack to fix overall alignment
        tb.RenderTransform = tb._trackingAlignment;

    }

    private readonly TranslateTransform _tracking = new TranslateTransform();
    private readonly TranslateTransform _trackingAlignment = new TranslateTransform();
    private readonly List<TextEffect> _trackingEffects = new List<TextEffect>();
    int _lastTrackingTextLength;

}

对于 xaml 使用：

<local:AdvancedStretchTextBlock Text=""... Tracking="-10"/>

参考：https://social.msdn.microsoft.com/Forums/vstudio/en-US/789c3e1b-e3ae-476f-b37f-d93ef6d0cb7b/character-spacing-in-textblocktextelement?forum=wpf

时间：2019-03-08 标签：c#wpftextblock

c# wpf textblock

c#

wpf

textblock