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namespace Tango.AutoComplete.Editors
{
using System.Diagnostics;
using System.Windows.Controls.Primitives;
using System.Windows.Input;
public class SelectionAdapter
{
#region "Fields"
private Selector _selectorControl;
#endregion
#region "Constructors"
public SelectionAdapter(Selector selector)
{
SelectorControl = selector;
SelectorControl.PreviewMouseUp += OnSelectorMouseDown;
}
#endregion
#region "Events"
public delegate void CancelEventHandler();
public delegate void CommitEventHandler();
public delegate void SelectionChangedEventHandler();
public event CancelEventHandler Cancel;
public event CommitEventHandler Commit;
public event SelectionChangedEventHandler SelectionChanged;
#endregion
#region "Properties"
public Selector SelectorControl
{
get { return _selectorControl; }
set { _selectorControl = value; }
}
#endregion
#region "Methods"
public void HandleKeyDown(KeyEventArgs key)
{
Debug.WriteLine(key.Key);
switch (key.Key)
{
case Key.Down:
IncrementSelection();
break;
case Key.Up:
DecrementSelection();
break;
case Key.Enter:
if (Commit != null)
{
Commit();
}
break;
case Key.Escape:
if (Cancel != null)
{
Cancel();
}
break;
case Key.Tab:
if (Commit != null)
{
Commit();
}
break;
}
}
private void DecrementSelection()
{
if (SelectorControl.SelectedIndex == -1)
{
SelectorControl.SelectedIndex = SelectorControl.Items.Count - 1;
}
else
{
SelectorControl.SelectedIndex -= 1;
}
if (SelectionChanged != null)
{
SelectionChanged();
}
}
private void IncrementSelection()
{
if (SelectorControl.SelectedIndex == SelectorControl.Items.Count - 1)
{
SelectorControl.SelectedIndex = -1;
}
else
{
SelectorControl.SelectedIndex += 1;
}
if (SelectionChanged != null)
{
SelectionChanged();
}
}
private void OnSelectorMouseDown(object sender, MouseButtonEventArgs e)
{
if (Commit != null)
{
Commit();
}
}
#endregion
}
}
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