Dynamic Crop Dimensions

	// Here we try to find CropEffect control into the Page.
	private Control FindControlRecursive(Control root)
	{
		if (root is Aurigma.PhotoEditor.Effects.CropEffect)
			return root;
		for (int i = 0; i < root.Controls.Count; i++)
		{
			Control cl = null;
			cl = FindControlRecursive(root.Controls[i]);
			if (cl != null)
				return cl;
		}
		return null;
	}

	protected override void Render(HtmlTextWriter writer)
	{
		// For example the type of property can be passed through 'get' query string
		// .../Default.aspx?type=card
		string type = Page.Request.Params["type"];
		// If we have some type in get request string we should save it to ViewState.
		// This will allow us use PostBacks and not forget about current type of the property.
		if (!String.IsNullOrEmpty(type))
		{
			this.ViewState["type"] = type;
		}
		string tp = (this.ViewState["type"] != null) ? this.ViewState["type"].ToString() : null;
		if ((!String.IsNullOrEmpty(tp)))
		{
			// Find CropEffect.
			// We make search in Render(...) function because control of the effect was 
			// added to the controls tree during OnPreRender stage.
			Control cl = FindControlRecursive(PhotoEditorSample1);
			if (cl != null)
			{
				Aurigma.PhotoEditor.Effects.CropEffect ce = (Aurigma.PhotoEditor.Effects.CropEffect)cl;
				// Here we just replace formats string of the Crop effect.
				if (tp == "photo")
				{
					ce.Params["formats"] = "4|6|true|Images/Effects/Crop/CropEffect4x6.png|4x6(photo)";
				}
				else if (tp == "card")
				{
					ce.Params["formats"] = "2|5|true|Images/Effects/Crop/CropEffect4x6.png|2x5(card)";
				}
			}
		}
		// Here we are happy.
		
		base.Render(writer);
	}