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WPF: FormattedText Outlined Text example

 

# Code Beispiel eines Textes mit Füllung und Umrandung in Windows 10 WPF

 

Dieses Beispiel zeigt wie man ein umrandeten Text in Windows erstellen kann

Die Klasse hierzu ist in WPF FormattedText

 

Man erstellt ein FormattedText Element, bildet hieraus eine Geometry und diese kann dann angezeigt werden.

FormattedText ft = new FormattedText(Text, CultureInfo.CurrentCulture, FlowDirection.LeftToRight, Typeface, FontSize, Foreground);

Geometry geometry = ft.BuildGeometry(new Point(0.0, 0.0));

dc.DrawText(ft, new Point(0.0, 0.0));

dc.DrawGeometry(null, new Pen(BorderBrush, Stroke), geometry);

 

 

Anzeige eines FormattedText Elements

 

Folgende der Beispiel Code in C#

C# Codebehind

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Data;

using System.Windows.Documents;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Imaging;

using System.Windows.Navigation;

using System.Windows.Shapes;

 

using System.Windows.Threading; //dispatcher

using System.Globalization;     //cultureinfo

 

 

namespace wpf_Font

{

 

    public class OutlineTextElement : FrameworkElement

    {

        public FontFamily FontFamily { get; set; }

        public FontWeight FontWeight { get; set; }

        public FontStyle FontStyle { get; set; }

        public int FontSize { get; set; }

        public int Stroke { get; set; }

 

        public SolidColorBrush Background { get; set; }

        public SolidColorBrush Foreground { get; set; }

        public SolidColorBrush BorderBrush { get; set; }

 

        private Typeface Typeface;

        private VisualCollection Visuals;

        private Action Render_Text_Action;

        private DispatcherOperation CurrentDispatcherOperation;

 

        private string text;

        public string Text

        {

            get { return text; }

            set

            {

                if (String.Equals(text, value, StringComparison.CurrentCulture))return;

                text = value;

                Render_Text();

            }

        }

 

        public OutlineTextElement()

        {

            //---------< Init: OutlineTextElement() >---------

            Focusable = true;

 

            Visuals = new VisualCollection(this);

 

            FontFamily = new FontFamily("Century");

            FontWeight = FontWeights.Bold;

            FontStyle = FontStyles.Normal;

            FontSize = 42;

            Stroke = 3;

            Typeface = new Typeface(FontFamily, FontStyle, FontWeight, FontStretches.Normal);

 

            Foreground = Brushes.Black;

            BorderBrush = Brushes.Gold;

 

            //< draw >

            Render_Text_Action = () => { Render_FormattedText(); };   //define RenderTextAction

            Loaded += (o, e) => { Render_Text(); };             //call previous rendertextAction

            //</ draw >

 

            //< events >

            MouseDown += OutlineTextElement_MouseDown;

            KeyDown += OutlineTextElement_KeyDown;

            //</ events >

            //---------</ Init: OutlineTextElement() >---------

        }

 

 

        private void OutlineTextElement_MouseDown(object sender, MouseButtonEventArgs e)

        {

            //MessageBox.Show("Mousedown");

            Focus();                                   

        }

        private void OutlineTextElement_KeyDown(object sender, KeyEventArgs e)

        {

            //MessageBox.Show("Key=" + e.Key);           

            //OutlineTextElement ctl = sender as OutlineTextElement;

            //string text = ctl.text;

            text = text + e.Key;

            Render_Text();

        }

 

       

 

        private void Render_FormattedText()

        {

            //---------< Render_FormattedText() >---------

            Visuals.Clear();

 

            DrawingVisual visual = new DrawingVisual();

            using (DrawingContext dc = visual.RenderOpen())

            {

                FormattedText ft = new FormattedText(Text, CultureInfo.CurrentCulture, FlowDirection.LeftToRight, Typeface, FontSize, Foreground);

                Geometry geometry = ft.BuildGeometry(new Point(0.0, 0.0));

                dc.DrawText(ft, new Point(0.0, 0.0));

                dc.DrawGeometry(null, new Pen(BorderBrush, Stroke), geometry);

 

                //// Create a set of polygons by flattening the Geometry object.

                //PathGeometry pathGeometry = geometry.GetFlattenedPathGeometry();

 

                //// Supply the empty Path element in XAML with the PathGeometry in order to render the polygons.

                //path.Data = pathGeometry;

 

                //// Use the PathGeometry for the matrix animation,

                //// allowing the ellipse to follow the path of the polygons.

                //matrixAnimation.PathGeometry = pathGeometry;

            }

            Visuals.Add(visual);

            //---------</ Render_FormattedText() >---------

        }

        private void Render_Text()

        {

            //---------< Rendering() >---------

            if (CurrentDispatcherOperation != null)

                CurrentDispatcherOperation.Abort();

 

            CurrentDispatcherOperation = Dispatcher.BeginInvoke(Render_Text_Action, DispatcherPriority.Render, null);

            CurrentDispatcherOperation.Aborted += (o, e) => { CurrentDispatcherOperation = null; };

            CurrentDispatcherOperation.Completed += (o, e) => { CurrentDispatcherOperation = null; };

            //---------</ Rendering() >---------

        }

        protected override Visual GetVisualChild(int index)

        {

            return Visuals[index];

        }

        protected override int VisualChildrenCount

        {

            get { return Visuals.Count; }

        }

    }

 

 

 

 

    /// <summary>

    /// Interaktionslogik für MainWindow.xaml

    /// </summary>

    ///

 

 

    public partial class MainWindow : Window

    {

       

        public MainWindow()

        {

            InitializeComponent();

        }

 

       

        #region Buttons

        //----------------------< Buttons >----------------------

        private void btnShow_Click(object sender, RoutedEventArgs e)

        {

            fl_Update_Text();

        }

        //----------------------</ Buttons >----------------------

        #endregion

 

        private void tbxText_TextChanged(object sender, TextChangedEventArgs e)

        {

            fl_Update_Text();

        }

 

 

        #region Functions

        //----------------------< Functions >----------------------

        private void fl_Update_Text()

        {

            if (ctlFormattedText != null)

            {

            ctlFormattedText.Text = tbxText.Text;

            ctlFormattedText.UpdateLayout();

            }

        }

 

        private void ctlFormattedText_KeyDown(object sender, KeyEventArgs e)

        {

 

        }

        //----------------------</ Functions >----------------------

        #endregion

 

 

 

      

 

    }

}

 

 

XAML

<Window x:Class="wpf_Font.MainWindow"

        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"

        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"

        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"

       

        xmlns:local="clr-namespace:wpf_Font"

        mc:Ignorable="d"

        Title="MainWindow" Height="350" Width="525">

    <Grid >

        <Grid.RowDefinitions>

            <RowDefinition Height="46"/>

            <RowDefinition Height="275*"/>

        </Grid.RowDefinitions>

        <TextBox x:Name="tbxText" HorizontalAlignment="Left" Margin="18,9,0,13.4" TextWrapping="Wrap" Text="Hello" Width="120" TextChanged="tbxText_TextChanged" />

        <Button x:Name="btnShow" Content="Show Text" Margin="149,9,0,16.4" d:LayoutOverrides="Height" HorizontalAlignment="Left" Width="75" Click="btnShow_Click"/>

       

        <local:OutlineTextElement x:Name="ctlFormattedText" Text="Hello"  Grid.Row="1" >

 

        </local:OutlineTextElement>

 

    </Grid>

</Window>

 

 

Mobile

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