TextEffectResolver Classe

Definizione

Spazio dei nomi:

System.Windows.Documents

Assembly:

PresentationFramework.dll

Classe helper che imposta effetti di testo in un contenitore di testo.

public ref class TextEffectResolver abstract sealed

public static class TextEffectResolver

type TextEffectResolver = class

Public Class TextEffectResolver

Ereditarietà

Object

TextEffectResolver

Esempio

Nell'esempio seguente viene illustrato come applicare un TranslateTransformeffetto di testo , ScaleTransforme RotateTransform al testo. Di seguito è riportato il codice XAML per l'esempio.

<Page  
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    x:Class="SDKSample.TextEffectTargetExample"
    Title="TextBlock Properties Sample">

  <StackPanel>

    <RadioButton Click="teTranslate" Margin="5,0,5,0">TranslateTransform</RadioButton>
    <RadioButton Click="teScale" Margin="5,0,5,0">ScaleTransform</RadioButton>
    <RadioButton Click="teRotate" Margin="5,0,5,0">RotateTransform</RadioButton>

    <TextBlock Background="LightGray" TextWrapping="Wrap" Name="tb1">
      Lorem ipsum dolor sit amet, consectetuer adipiscing elit.
      Nam laoreet dolor et dolor. Vestibulum quis nunc auctor ante dignissim venenatis. Curabitur wisi.
      Donec faucibus auctor ipsum. In fermentum dui.  Ut suscipit aliquam eros. Nullam elementum quam eu
      enim. Sed a purus id nisl imperdiet blandit. Cum sociis natoque penatibus et magnis dis parturient
      montes, nascetur ridiculus mus. Sed at quam.
    </TextBlock>

  </StackPanel>

</Page>

Di seguito è indicato il code-behind per l'esempio.

using System;
using System.Windows;
using System.Collections;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Documents;

namespace SDKSample
{
    public partial class TextEffectTargetExample : Page
    {

        // Event handler for translating (moving) the text element.
        public void teTranslate(object sender, RoutedEventArgs e)
        {
            // Wipe out existing TextEffects on the TextBlock
            DisableTextEffects();

            TextEffect myEffect = new TextEffect();
            myEffect.PositionStart = 0;
            myEffect.PositionCount = 999;

            // Create a TranslateTransform that moves the TextBlock to an offset position of
            // 50,50.
            TranslateTransform myTranslateTransform = new TranslateTransform(50,50);
            myEffect.Transform = myTranslateTransform;

            // Apply the effect to the TextBlock
            EnableTextEffects(tb1, myEffect);
         }

         // Event handler for transforming the size of the text element.
        public void teScale(object sender, RoutedEventArgs e)
        {
            // Wipe out existing TextEffects on the TextBlock
            DisableTextEffects();

            TextEffect myEffect = new TextEffect();
            myEffect.PositionStart = 0;
            myEffect.PositionCount = 999;

            // Create a ScaleTransform that scales the TextBlock by 5.
            ScaleTransform myScaleTransform = new ScaleTransform(5,5);
            myEffect.Transform = myScaleTransform;

            // Apply the effect to the TextBlock
            EnableTextEffects(tb1, myEffect);
        }

        public void teRotate(object sender, RoutedEventArgs e)
        {
            // Wipe out existing TextEffects on the TextBlock
            DisableTextEffects();

            TextEffect myEffect = new TextEffect();
            myEffect.PositionStart = 0;
            myEffect.PositionCount = 999;

            // Create a ScaleTransform that rotates the text by 45 degrees.
            RotateTransform myRotateTransform = new RotateTransform(45);
            myEffect.Transform = myRotateTransform;

            // Apply the effect to the TextBlock
            EnableTextEffects(tb1, myEffect);
        }

        // Disable all existing text effects to make way for new ones.
        private void DisableTextEffects()
        {
            if (_textEffectTargets != null)
            {
                foreach (TextEffectTarget target in _textEffectTargets) 
                     target.Disable();
            }
        }

        // Enable TextEffectTargets and apply effect to TextBlock.
        private void EnableTextEffects(TextBlock tb, TextEffect effect)
        {
            _textEffectTargets = TextEffectResolver.Resolve(tb.ContentStart, tb.ContentEnd, effect);
            foreach (TextEffectTarget target in _textEffectTargets)
                target.Enable();           
        }

        private TextEffectTarget[] _textEffectTargets; 
    }
}

Metodi

Resolve(TextPointer, TextPointer, TextEffect)

Risolve l'effetto di testo su un intervallo di testo in un elenco di destinazioni di effetto di testo.