Scrolling Text?

[Phillip Foster]

Random question:

Is there a way to make this control do scrolling text?

example
textbox would contain:

"this is a.."
"his is a t"
"is is a te"
"s is a tes"
" is a test"
"is a test "

I'm not that was not necessary, but eh. 
Anyone know?'

[Richard Slade]

Hi,

As far as Im aware, there is no default support for this. You'd need to implement your own system for updating text in the textbox that would immitate scrolling text.

However, I'd have a look at the demo applications that are installed with the controls and use either a rad rotator or even a rad progress bar (where you can use your own image)
Hope that helps
Richard

[Emanuel Varga]

Hello Philip,

There is no telerik control that does this, but i have prepared a CustomRadTextBoxControl that will do this, please see the following example, it should help you accomplish your task:

using System;
using System.Windows.Forms;
using Telerik.WinControls.UI;

public partial class Form1 : Form
{
    ScrollableRadTextBox radTextBox1 = new ScrollableRadTextBox();

    public Form1()
    {
        InitializeComponent();
    }

    protected override void OnLoad(EventArgs e)
    {
        base.OnLoad(e);

        radTextBox1.Dock = DockStyle.Top;
        this.Controls.Add(radTextBox1);
        radTextBox1.Text = "This is a test of the emergency broadcast systems";
        radTextBox1.StartScrolling(20);

        var stopButton = new RadButton();
        stopButton.Text = "Stop";
        this.Controls.Add(stopButton);
        stopButton.Dock = DockStyle.Bottom;
        stopButton.Click += new EventHandler(stopButton_Click);

        var startButton = new RadButton();
        startButton.Text = "Start";
        this.Controls.Add(startButton);
        startButton.Dock = DockStyle.Bottom;
        startButton.Click += new EventHandler(startButton_Click);
    }

    void stopButton_Click(object sender, EventArgs e)
    {
        radTextBox1.EndScrolling();
    }

    void startButton_Click(object sender, EventArgs e)
    {
        radTextBox1.StartScrolling(20);
    }
}

public class ScrollableRadTextBox : RadTextBox
{
    private Timer scrollTimer = new Timer();

    private string currentText;

    public override string ThemeClassName
    {
        get
        {
            return typeof(RadTextBox).FullName;
        }
    }

    public ScrollableRadTextBox()
        : base()
    {
        scrollTimer.Interval = 200;
    }

    private void ScrollText(int noCharacters)
    {
        if (this.Text.Length == 0 || this.Text.Length < noCharacters)
        {
            return;
        }

        var pos = 0;
        currentText = Text;
        var tempText = currentText + " " + currentText;
        scrollTimer.Tick += delegate
            {
                if (pos - 1 > currentText.Length) pos = 0;
                Text = tempText.Substring(pos++, noCharacters);
            };

        scrollTimer.Start();
    }

    public void StartScrolling(int noCharacters)
    {
        this.ScrollText(noCharacters);
    }

    public void EndScrolling()
    {
        scrollTimer.Stop();
        this.Text = currentText;
    }
}

Hope this helps, if you have any other questions or comments, please let me know,

Best Regards,
Emanuel Varga