/// <summary>
/// remove watermark from list
/// </summary>
/// <param name="selectedIndex"></param>
/// <returns>
/// Returns true if there is at least one watermark remaining; otherwise false.
/// </returns>
public bool RemoveWatermark(int selectedIndex)
{
if (this.watermarkCollection != null &&
this.watermarkCollection.Count >= selectedIndex + 1)
{
WatermarkBase watermark = this.watermarkCollection[selectedIndex];
watermark.PropertyChanged -= watermark_PropertyChanged;
this.watermarkCollection.RemoveAt(selectedIndex);
if (this.watermarkCollection.Count > 0)
{
return(true);
}
else
{
return(false);
}
}
else
{
return(false);
}
}
public void AddWatermark(WatermarkBase watermark)
{
watermark.PropertyChanged += new PropertyChangedEventHandler(watermark_PropertyChanged);
this.watermarkCollection.Add(watermark);
}