TImageEnLayerMView.OnIncludeLayer

Declaration

property OnIncludeLayer: TIEIncludeLayerEvent;

Description

Occurs whenever the control needs to build the list of layers.
You can set Include to False, to exclude a layer from view.

Note: OnIncludeLayer is called frequently. Avoid using code that will slow processing (e.g. file or image operations)

Examples

// Exclude masks from view
procedure TMyForm.IELayerMView1IncludeLayer(Sender: TObject; LayerIndex: integer; Layer: TIELayer; var Include: Boolean);
begin
  if Layer.IsMask = False then
    Include := False;
end;

// Exclude images that have an alpha channel
procedure TMyForm.IELayerMView1IncludeLayer(Sender: TObject; LayerIndex: integer; Layer: TIELayer; var Include: Boolean);
begin
  if ( Layer.Kind = ielkImage ) and TIEImageLayer( Layer ).Bitmap.HasAlphaChannel then
    Include := False;
end;

// Show only shapes
procedure TMyForm.IELayerMView1IncludeLayer(Sender: TObject; LayerIndex: integer; Layer: TIELayer; var Include: Boolean);
begin
  Include := Layer.Kind = ielkShape;
end;

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