/// <summary>
/// Called when [data setting].
/// </summary>
/// <param name="sender">The sender.</param>
/// <param name="e">The <see cref="System.Windows.DataObjectSettingDataEventArgs"/> instance containing the event data.</param>
private void OnDataSetting(object sender, DataObjectSettingDataEventArgs e)
{
RichTextBox richTextBox = sender as RichTextBox;
if (richTextBox == null) { return; }
StringToFlowDocumentConverter converter = new StringToFlowDocumentConverter();
TextSelection selection = richTextBox.Selection;
string text = converter.ConvertFlowDocumentDataToStringWithinSelection(selection.Start, selection.End);
e.DataObject.SetData(System.Windows.DataFormats.UnicodeText, text);
}
/// <summary>
/// Inserts the text to rich text box at position.
/// </summary>
/// <param name="richTextBox">The rich text box.</param>
/// <param name="text">The text.</param>
public void InsertTextToRichTextBoxAtPosition(RichTextBox richTextBox, string text)
{
StringToFlowDocumentConverter converter = new StringToFlowDocumentConverter();
//first determine if richtextbox document is empty... if so add first paragraph
if (richTextBox.Document.Blocks.Count == 0)
{
richTextBox.Document.Blocks.Add(new Paragraph());
}
TextPointer insertionPosition = richTextBox.CaretPosition.GetInsertionPosition(LogicalDirection.Forward);
Paragraph currentParagraph = insertionPosition.Paragraph;
using (StringReader reader = new StringReader(text))
{
string newLine;
bool firstLine = true;
while ((newLine = reader.ReadLine()) != null)
{
//if this is first line - append it to the existing paragraph in document
if (firstLine)
{
converter.AppendTextToParagraph(currentParagraph, newLine);
firstLine = false;
}
else
{
//all other lines append as new paragraphs to text after first paragraph
Paragraph newParagraph = converter.ConvertStringLineToParagraph(newLine);
richTextBox.Document.Blocks.InsertAfter(currentParagraph, newParagraph);
currentParagraph = newParagraph;
}
}
}
}
