/// <summary>method: SendToBack
/// method to resequence arrayList so selected shape is
/// drawn first
/// </summary>
/// <param name="aShape"></param>
public void SendToBack(AnyShape aShape)
{
// first shape drawn is at the back
// temp arrayList to resort shapes so selected shape is drawn first
ArrayList sortList = new ArrayList();
// find index of shape to be drawn first
int max = shapeList.IndexOf(aShape);
// first shape i.e. shape to send to back
sortList.Add(aShape);
// copy to sortList in correct sequence
for (int i = 0; i < max; i++)
{
sortList.Add(shapeList[i]);
}
// copy sortList back to shapeList
for (int i = 0; i < sortList.Count; i++)
{
shapeList[i] = sortList[i];
}
UpdateViews();
}
/// <summary>method: BringToFront
/// method to resequence arrayList so selected shape is
/// drawn last
/// </summary>
/// <param name="aShape"></param>
public void BringToFront(AnyShape aShape)
{
// last shape drawn is at the front
// temp arrayList to resort shapes so selected shape is drawn last
ArrayList sortList = new ArrayList(shapeList);
// find index of shape to be drawn last
int max = shapeList.IndexOf(aShape);
// find length of shapeList array
int length = shapeList.Count;
// copy shapeList to sortList excluding selected shape
for (int i = max + 1; i < length; i++)
{
sortList[i - 1] = shapeList[i];
}
// last shape i.e. shape to bring to front
sortList[length - 1] = shapeList[max];
// copy sortList back to shapeList
for (int i = 0; i < sortList.Count; i++)
{
shapeList[i] = sortList[i];
}
UpdateViews();
}
/// <summary>method: UpdateShape
/// update views
/// </summary>
/// <param name="aShape"></param>
public void UpdateShape(AnyShape aShape)
{
UpdateViews();
}
/// <summary>method: DeleteShape
/// delete shape and update views
/// </summary>
/// <param name="aShape"></param>
public void DeleteShape(AnyShape aShape)
{
shapeList.Remove(aShape);
UpdateViews();
}
/// <summary>method: AddShape
/// add shape to the model and update views
/// </summary>
/// <param name="aShape"></param>
public void AddShape(AnyShape aShape)
{
shapeList.Add(aShape);
UpdateViews();
}
