ImageEn, unit imageenview

TImageEnView.LayersCurrent

TImageEnView.LayersCurrent


Declaration

property LayersCurrent: Integer;


Description

Returns or sets the active layer (the index of the layer returned by CurrentLayer).
The first layer has the index of 0, the last is LayersCount - 1.
Making a layer current changes the IEBitmap, so it points to the current layer (allowing specification of which layer is active for input/output and image processing operations).

Note:
 Use CurrentLayer to return the layer object. Use LayersCurrent to get or set the current layer by its index
 Setting LayersCurrent does NOT deselect existing layers (if multiple layer selection is enabled)


Example

// load 'first.jpg' in layer 0 and 'second.jpg' in layer 1
ImageEnView1.LayersCurrent := 0;
ImageEnView1.IO.LoadFromFile('C:\first.jpg');
ImageEnView1.LayersCurrent := 1;
ImageEnView1.IO.LoadFromFile('C:\second.jpg');

// Clear the top-most layer
ImageEnView1.LayersCurrent := ImageEnView1.LayersCount - 1;
ImageEnView1.Clear;

// Flip the 2nd layer
ImageEnView1.LayersCurrent := 1;
ImageEnView1.Proc.Flip( fdHorizontal );