/// <summary>
/// Event handler for ApplicationCommands.Copy command.
/// <remarks>
/// We want to enforce that data can be set on the clipboard
/// only in plain text format from this RichTextBox.
/// </remarks>
/// </summary>
private static void OnCopy(object sender, ExecutedRoutedEventArgs e)
{
PlainRichTextBox myRichTextBox = (PlainRichTextBox)sender;
string selectionText = myRichTextBox.Selection.Text;
Clipboard.SetText(selectionText);
e.Handled = true;
}
/// <summary>
/// Event handler for ApplicationCommands.Paste command.
/// <remarks>
/// We want to allow paste only in plain text format.
/// </remarks>
/// </summary>
private static void OnPaste(object sender, ExecutedRoutedEventArgs e)
{
PlainRichTextBox myRichTextBox = (PlainRichTextBox)sender;
// Handle paste only if clipboard supports text format.
if (Clipboard.ContainsText())
{
myRichTextBox.Selection.Text = Clipboard.GetText();
}
e.Handled = true;
}
/// <summary>
/// CanExecute event handler for ApplicationCommand.Paste.
/// </summary>
private static void OnCanExecutePaste(object target, CanExecuteRoutedEventArgs args)
{
PlainRichTextBox myRichTextBox = (PlainRichTextBox)target;
args.CanExecute = myRichTextBox.IsEnabled && !myRichTextBox.IsReadOnly && Clipboard.ContainsText();
}
/// <summary>
/// CanExecute event handler for ApplicationCommands.Cut.
/// </summary>
private static void OnCanExecuteCut(object target, CanExecuteRoutedEventArgs args)
{
PlainRichTextBox myRichTextBox = (PlainRichTextBox)target;
args.CanExecute = myRichTextBox.IsEnabled && !myRichTextBox.IsReadOnly && !myRichTextBox.Selection.IsEmpty;
}