/// <summary>
/// Remove a layer from this collection.
/// </summary>
/// <param name="layer"></param>
/// <remarks>
/// If the layer is owned by this collection's container, this method
/// calls <see cref="M:Northwoods.Go.GoLayer.Clear" /> on <paramref name="layer" />.
/// The <see cref="M:Northwoods.Go.IGoLayerCollectionContainer.RaiseChanged(System.Int32,System.Int32,System.Object,System.Int32,System.Object,System.Drawing.RectangleF,System.Int32,System.Object,System.Drawing.RectangleF)" />
/// call gets a <see cref="F:Northwoods.Go.GoLayerCollection.RemovedLayer" /> hint.
/// </remarks>
public bool Remove(GoLayer layer)
{
if (layer == null)
{
return(false);
}
int num = IndexOf(layer);
if (num < 0)
{
return(false);
}
bool flag = layer.LayerCollectionContainer == LayerCollectionContainer;
if (flag)
{
layer.Clear();
}
GoLayer goLayer = null;
foreach (GoLayer myLayer in myLayers)
{
if (myLayer != layer && myLayer.LayerCollectionContainer == LayerCollectionContainer)
{
goLayer = myLayer;
break;
}
}
if (goLayer == null)
{
return(false);
}
GoLayer oldVal = null;
checked
{
if (num + 1 < myLayers.Count)
{
oldVal = myLayers[num + 1];
}
if (flag)
{
layer.LayerCollectionIndex = -1;
}
myLayers.RemoveAt(num);
UpdateLayerIndices();
try
{
LayerCollectionContainer.RaiseChanged(802, 0, layer, 0, oldVal, NullRect, 0, null, NullRect);
}
finally
{
if (layer == Default)
{
Default = goLayer;
}
}
return(true);
}
}
internal void moveInCollection(int newidx, GoLayer moving, int oldidx, bool undoing)
{
if (oldidx >= 0 && oldidx < myLayers.Count && newidx >= 0 && newidx < myLayers.Count)
{
myLayers.RemoveAt(oldidx);
myLayers.Insert(newidx, moving);
UpdateLayerIndices();
}
LayerCollectionContainer.RaiseChanged(803, 0, this, oldidx, moving, NullRect, newidx, moving, NullRect);
}
internal void InsertBefore(GoLayer dest, GoLayer newlayer)
{
if (dest == null)
{
dest = Bottom;
}
int num = IndexOf(dest);
if (num >= 0)
{
myLayers.Insert(num, newlayer);
UpdateLayerIndices();
LayerCollectionContainer.RaiseChanged(801, 0, newlayer, num, dest, NullRect, num, newlayer, NullRect);
}
}
internal void InsertAfter(GoLayer dest, GoLayer newlayer)
{
if (dest == null)
{
dest = Top;
}
int num = IndexOf(dest);
checked
{
if (num >= 0)
{
myLayers.Insert(num + 1, newlayer);
UpdateLayerIndices();
LayerCollectionContainer.RaiseChanged(801, 1, newlayer, num, dest, NullRect, num + 1, newlayer, NullRect);
}
}
}
