New Data nGamma. Default value 1.0
Programmer can assign any value 0.0 or greater to change the Gamma value.
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#include "fivewin.ch"
function Main()
local oDlg, oImage, oFont, cFile
local oGamma, nGamma := 100.0, oSay
cFile := "..\bitmaps\olga1.jpg"
DEFINE FONT oFont NAME "Segoe UI" SIZE 0,-14
DEFINE DIALOG oDlg SIZE 600,800 PIXEL TRUEPIXEL RESIZABLE FONT oFont ;
TITLE Upper( cFileName( cFile ) )
@ 60,20 XIMAGE oImage FILE cfile SIZE -20,-20 OF oDlg
oImage:FitRect()
@ 10,20 SAY "Gamma" SIZE 100,20 PIXEL OF oDlg
@ 10,120 SLIDER oGamma VAR nGamma SIZE oDlg:nWidth - 260,20 PIXEL OF oDlg ;
HORIZONTAL RANGE 0,300 UPDATE TOP DIRECTION ;
ON CHANGE ( oImage:nGamma := nVar * 0.01, oDlg:Update() ) ;
ON THUMBPOS ( nGamma := nVar, oImage:nGamma := nVar * 0.01, oDlg:Update() ) ;
SLIMSTYLE
@ 10,oDlg:nWidth - 120 SAY oSay PROMPT { || oImage:nGamma } PICTURE "9.9999" SIZE 100,20 PIXEL OF oDlg RIGHT UPDATE
ACTIVATE DIALOG oDlg CENTERED
RELEASE FONT oFont
return nil
