protected override void OnDrop(DragEventArgs dea)
{
if (dea.Data.GetDataPresent(DataFormats.FileDrop))
{
var files = dea.Data.GetData(DataFormats.FileDrop) as string[];
if (files == null)
{
return;
}
if (Images.HasImageExtension(files[0]))
{
var dialog = new ImageDropDialog
{
Owner = Application.Current.MainWindow,
TextEditor = EditBox,
DocumentFileName = FileName,
DragEventArgs = dea
};
dialog.ShowDialog();
}
else
{
Dispatcher.InvokeAsync(() => OpenFileCommand.Command.Execute(files[0], this));
}
}
}
protected override void OnDrop(DragEventArgs e)
{
if (e.Data.GetDataPresent(DataFormats.FileDrop))
{
var files = e.Data.GetData(DataFormats.FileDrop) as string[];
if (files == null)
{
return;
}
var imageExtensions = new[] { ".jpg", "jpeg", ".png", ".gif" };
if (imageExtensions.Any(ext => files[0].EndsWith(ext, StringComparison.OrdinalIgnoreCase)))
{
var dialog = new ImageDropDialog
{
Owner = Application.Current.MainWindow,
TextEditor = EditBox,
DragEventArgs = e
};
dialog.ShowDialog();
}
else
{
Dispatcher.InvokeAsync(() => OpenFile(files[0]));
}
}
}
private void AllowImagePaste()
{
// AvalonEdit only allows text paste. Hack the command to allow otherwise.
var cmd = EditBox.TextArea.DefaultInputHandler.Editing.CommandBindings.FirstOrDefault(cb => cb.Command == Paste);
if (cmd == null)
{
return;
}
CanExecuteRoutedEventHandler canExecute = (sender, args) =>
args.CanExecute = EditBox.TextArea?.Document != null &&
EditBox.TextArea.ReadOnlySectionProvider.CanInsert(EditBox.TextArea.Caret.Offset);
ExecutedRoutedEventHandler execute = null;
execute = (sender, args) =>
{
if (System.Windows.Clipboard.ContainsText())
{
// WPF won't continue routing the command if there's PreviewExecuted handler.
// So, remove it, call Execute and reinstall the handler.
// Hack, hack hack...
try
{
cmd.PreviewExecuted -= execute;
cmd.Command.Execute(args.Parameter);
}
finally
{
cmd.PreviewExecuted += execute;
}
}
else if (System.Windows.Clipboard.ContainsImage())
{
var dialog = new ImageDropDialog
{
Owner = Application.Current.MainWindow,
TextEditor = EditBox,
DocumentFileName = FileName,
UseClipboardImage = true
};
dialog.ShowDialog();
args.Handled = true;
}
};
cmd.CanExecute += canExecute;
cmd.PreviewExecuted += execute;
}