Hi Justin,
Thank you for writing.
Here is how you can achieve drag and drop from a text box to RadRichTextBox:
public partial class Form1 : Form
{
RadTextBox radTextBox = new RadTextBox();
Point clickedPoint;
bool mouseDown = false;
protected override void OnLoad(EventArgs e)
{
base.OnLoad(e);
InitializeComponent();
this.Controls.Add(radTextBox);
radTextBox.Dock = DockStyle.Top;
radTextBox.TextBoxElement.TextBoxItem.MouseDown += tb_MouseDown;
radTextBox.TextBoxElement.TextBoxItem.MouseMove += tb_MouseMove;
AddRichTextBox();
radRichTextBox1.AllowDrop = true;
radRichTextBox1.DragOver += radRichTextBox1_DragOver;
radRichTextBox1.DragDrop += radRichTextBox1_DragDrop;
}
private static bool IsRealDrag(Point mousePosition, Point initialMousePosition)
{
return (Math.Abs(mousePosition.X - initialMousePosition.X) >= SystemInformation.DragSize.Width) ||
(Math.Abs(mousePosition.Y - initialMousePosition.Y) >= SystemInformation.DragSize.Height);
}
void tb_MouseMove(object sender, MouseEventArgs e)
{
if (mouseDown && IsRealDrag(e.Location, clickedPoint))
{
radTextBox.DoDragDrop(radTextBox.Text, DragDropEffects.Copy | DragDropEffects.Move);
mouseDown = false;
}
}
void tb_MouseDown(object sender, MouseEventArgs e)
{
if (e.Button == System.Windows.Forms.MouseButtons.Left)
{
mouseDown = true;
clickedPoint = e.Location;
}
}
void radRichTextBox1_DragDrop(object sender, DragEventArgs e)
{
string text = e.Data.GetData(typeof(string)) as string;
radRichTextBox1.RichTextBoxElement.Document.CaretPosition.SetPosition(radRichTextBox1.PointToClient(MousePosition));
radRichTextBox1.Insert(text);
}
void radRichTextBox1_DragOver(object sender, DragEventArgs e)
{
e.Effect = DragDropEffects.Move;
}
}
I hope that you find this information useful.
Regards,
Stefan
Telerik
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