public override object EditValue(System.ComponentModel.ITypeDescriptorContext context, IServiceProvider provider, object value)
{
wfes = (IWindowsFormsEditorService) provider.GetService(typeof(IWindowsFormsEditorService));
if((wfes == null) || (context == null))
return null ;
ImageList imageList = GetImageList(context.Instance) ;
if ((imageList == null) || (imageList.Images.Count==0))
return -1 ;
m_imagePanel = new ImageListPanel();
m_imagePanel.BackgroundColor = Color.FromArgb(241,241,241);
m_imagePanel.BackgroundOverColor = Color.FromArgb(102,154,204);
m_imagePanel.HLinesColor = Color.FromArgb(182,189,210);
m_imagePanel.VLinesColor = Color.FromArgb(182,189,210);
m_imagePanel.BorderColor = Color.FromArgb(0,0,0);
m_imagePanel.EnableDragDrop = true;
m_imagePanel.Init(imageList,12,12,6,(int)value);
// add listner for event
m_imagePanel.ItemClick += new ImageListPanelEventHandler(OnItemClicked);
// set m_selectedIndex to -1 in case the dropdown is closed without selection
m_selectedIndex = -1;
// show the popup as a drop-down
wfes.DropDownControl(m_imagePanel) ;
// return the selection (or the original value if none selected)
return (m_selectedIndex != -1) ? m_selectedIndex : (int) value ;
}
public void OnItemClicked(object sender, ImageListPanelEventArgs e)
{
m_selectedIndex = ((ImageListPanelEventArgs) e).SelectedItem;
//remove listner
m_imagePanel.ItemClick -= new ImageListPanelEventHandler(OnItemClicked);
// close the drop-dwon, we are done
wfes.CloseDropDown() ;
m_imagePanel.Dispose() ;
m_imagePanel = null ;
}