Unit 'layers'	Package
[Overview][Constants][Types][Procedures and functions][Variables][Index]	[#amunits]

CreateBehindHookLayer

Create a new layer behind all existing layers, using supplied callback BackFill hook.

Declaration

Source position: layers.pas line 91

function CreateBehindHookLayer(

li: pLayer_Info;

bm: pBitMap;

x0: LongInt;

y0: LongInt;

x1: LongInt;

y1: LongInt;

flags: LongInt;

hook: pHook;

bm2: pBitMap

):pLayer;

Arguments

`li`		pointer to LayerInfo structure
`bm`		pointer to common BitMap used by all Layers
`x0`		left corner of layer
`y0`		upper corner of layer
`x1`		right corner of layer
`y1`		lower corner of layer
`flags`		various types of layers supported as bit sets. Flags: LAYER*
`hook`		BackFill callback Hook
`bm2`		pointer to optional Super BitMap

Function result

pointer to Layer structure if successful nil if not successful

Description

Create a new Layer of position and size (x0,y0)->(x1,y1) Make this layer of type found in flags. Install Layer->BackFill callback Hook. If SuperBitMap, use bm2 as pointer to real SuperBitMap, and copy contents of Superbitmap into display layer. If this layer is a backdrop layer then place it behind all other layers including other backdrop layers. If this is not a backdrop layer then place it behind all nonbackdrop layers.

Attention

When using bm2 SuperBitmap, you should also set LAYERSMART flag.