[Overview][Constants][Types][Procedures and functions][Variables] Reference for unit 'gpm' (#rtl)

gpm_pushroi

Push region of interest on the stack.

Declaration

Source position: gpm.pp line 192

function gpm_pushroi(

  x1: LongInt;

  y1: LongInt;

  x2: LongInt;

  y2: LongInt;

  mask: LongInt;

  fun: TGpmHandler;

  xtradata: pointer

):Pgpm_roi;

Description

Gpm_PushRoi puts a new region of interest on the stack. The region of interest is defined by a rectangle described by the corners (X1,Y1) and (X2,Y2).

The mask describes which events the handler {fun} will handle; ExtraData will be put in the xtradata field of the {TGPM_Roi} record passed to the fun handler.

Errors

None.

See also

Gpm_RaiseRoi

  

Raise region of interest in the stack.

Gpm_PopRoi

  

Pop region of interest from the stack.

Gpm_LowerRoi

  

Lower a region of interest in the stack.