COLOUR ANIMATION in windows phone 7

Question

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XML

<phone:PhoneApplicationPage.Resources>
        <Storyboard x:Name="Storyboard1">
            <ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(TextBlock.Foreground).(SolidColorBrush.Color)" Storyboard.TargetName="textBlock">
                <EasingColorKeyFrame KeyTime="0:0:2.5" Value="Red"/>
                <EasingColorKeyFrame KeyTime="0:0:5" Value="Blue"/>
                <EasingColorKeyFrame KeyTime="0:0:7.5" Value="Red"/>
                <EasingColorKeyFrame KeyTime="0:0:10" Value="White"/>
            </ColorAnimationUsingKeyFrames>
        </Storyboard>
    </phone:PhoneApplicationPage.Resources>

Posted 20-Jul-12 18:23pm

gaurav273

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gaurav273 21-Jul-12 0:26am

i am in great problem,actually i want that,the color of my text present in textblock should change colour character by character,like if my text is ABCDE,so first A should change color,then B should change color.....AND SO ON,BUT BY USING THIS method,whole of the text colour is changing at once,so please tell me any solution?

[no name] 21-Jul-12 0:26am

And?

Sebastian T Xavier 21-Jul-12 0:31am

What is this?

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hzawary · Accepted Answer · 2012-07-21T02:11:00

I think, you cant use this way;) because foreground is property for all of the text in the TextBlock.
My solution:
Create 'Array' of TextBlock for example:

C#

TextBlock[] tb = new TextBlock[5];

then create a timer and finally with every tick event, change foreground one of array element.

Updated program in XAML:

XML

<Window x:Class="WpfApp_ColourTextBlock.MainWindow"
        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        xmlns:System="clr-namespace:System;assembly=mscorlib"
        Title="MainWindow" Height="350" Width="525" WindowStartupLocation="CenterScreen">
    <Window.Resources>
        <System:String x:Key="textBlockName">textBlock0</System:String>
        <Storyboard x:Key="Storyboard1">
            <ColorAnimationUsingKeyFrames Storyboard.TargetProperty="(TextBlock.Foreground).(SolidColorBrush.Color)" Storyboard.TargetName="{DynamicResource textBlockName}">
                <EasingColorKeyFrame KeyTime="0:0:2.5" Value="Red"/>
                <EasingColorKeyFrame KeyTime="0:0:5" Value="Blue"/>
                <EasingColorKeyFrame KeyTime="0:0:7.5" Value="Red"/>
                <EasingColorKeyFrame KeyTime="0:0:10" Value="White"/>
            </ColorAnimationUsingKeyFrames>
        </Storyboard>
    </Window.Resources>
    <Viewbox>
        <StackPanel Name="TextBlocks" Orientation="Horizontal">

        </StackPanel>
    </Viewbox>
</Window>

And code behind in C#:

C#

using System;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Animation;

namespace WpfApp_ColourTextBlock
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();

            counter = 0;
            foreach (char item in "Hello Word".ToArray())
            {
                TextBlock tb = new TextBlock();
                tb.Name = "textBlock" + counter++;
                this.RegisterName(tb.Name, tb);
                tb.Text = item.ToString();
                tb.Foreground = Brushes.DarkCyan;
                TextBlocks.Children.Add(tb);
            }

            counter = 0;

            System.Windows.Threading.DispatcherTimer myDispatcherTimer = new System.Windows.Threading.DispatcherTimer();
            myDispatcherTimer.Interval = new TimeSpan(0, 0, 0, 0, 1000); // 100 Milliseconds 
            myDispatcherTimer.Tick += new EventHandler(myDispatcherTimer_Tick);
            myDispatcherTimer.Start();
        }

        int counter;

        void myDispatcherTimer_Tick(object sender, EventArgs e)
        {
            Resources["textBlockName"] = "textBlock" + counter++;
            (Resources["Storyboard1"] as Storyboard).Begin();

            if (counter >= TextBlocks.Children.Count)
                counter = 0;
        }
    }
}