/// <summary>
/// When editing an image index value, let the user choose an image from
/// a popup that displays all the images in the associated <see cref="PSImgSet"/>
/// </summary>
/// <param name="context">designer context</param>
/// <param name="provider">designer service provider</param>
/// <param name="value">image index item</param>
/// <returns>
/// An image index (selected from the popup) or -1 if the user canceled the
/// selection
/// </returns>
public override object EditValue(ITypeDescriptorContext context,IServiceProvider provider,object value)
{
wfes = (IWindowsFormsEditorService)
provider.GetService(typeof(IWindowsFormsEditorService));
if((wfes == null) || (context == null))
return null ;
// Get the image set
PSImgSet imageSet = GetPSImgSet(context.Instance) ;
// anything to show?
if ((imageSet == null) || (imageSet.Count==0))
return -1 ;
// Create an image panel that is close to square
Size dims = PSImgPanel.CalculateBestDimensions(imageSet.Count,PSImgPanel.PanelSizeHints.MinimizeBoth) ;
imagePanel = new PSImgPanel((Bitmap) imageSet.Preview,imageSet.Count,dims.Height,dims.Width) ;
// set the current image index value as the default selection
imagePanel.DefaultImage = (int) value ;
// no grid
imagePanel.GridColor = Color.Empty ;
// listen for an image to be selected
imagePanel.ImageSelected += new EventHandler(imagePanel_ImageSelected);
// show the popup as a drop-down
wfes.DropDownControl(imagePanel) ;
// return the selection (or the original value if none selected)
return (selectedIndex != -1) ? selectedIndex : (int) value ;
}
/// <summary>
/// <see cref="PSImgPanel.ImageSelected"/> listener
/// </summary>
/// <param name="sender">The <see cref="PSImgPanel"/></param>
/// <param name="e"><see cref="PSImgEventArgs"/> specifying the selection (or -1)</param>
private void imagePanel_ImageSelected(object sender, EventArgs e)
{
// get the selection
selectedIndex = ((PSImgEventArgs) e).ImageIndex ;
// remove the listener
imagePanel.ImageSelected -= new EventHandler(imagePanel_ImageSelected);
// close the drop-dwon, we are done
wfes.CloseDropDown() ;
imagePanel.Dispose() ;
imagePanel = null ;
}
