/*
 * $Id$
 */

/*
   sample on using Maximize Mode in gtwvw.
   budyanto@centrin.net.id
 */

#include "inkey.ch"

* this dimension will be used when user presses RESTORE button
static s_nNormalMaxrow := 24
static s_nNormalMaxcol := 79

STATIC s_lSizeReady := .F.

procedure main
local ch
   * activate WVW_SIZE()
   s_lSizeReady := .t.

   * the biggest possible window
   setcolor("N/W")
   setmode(wvw_maxmaxrow()+1, wvw_maxmaxcol()+1)

   * enable MAXIMIZE button
   wvw_enablemaximize(0, .t.)

   * set the window to MAXIMIZED state
   wvw_maximize(0)

   updatescr()
   do while (ch := inkey(0))<>K_ESC
      * refresh screen, probably in a new dimension
      * (You may alternatively call updatescr() from WVW_SIZE instead)
      updatescr()
   enddo
return

procedure diminfo()
   @ 0, 0 say "Window size: " + alltrim(str(maxrow()+1)) + " x " + alltrim(str(maxcol()+1)) + "   "
return

procedure updatescr()
local i
   CLS
   for i := 0 to maxcol()
      @ 0,i say "T"
   next
   for i := 0 to maxrow()
      @ i,0 say "L"
   next
   for i := 0 to maxcol()
      @ maxrow(),i say "B"
      //@ maxrow()-1,i say right(tran(i,"999"),1)
   next
   for i := 0 to maxrow()
      @ i,maxcol() say "R"
   next
   @ int(maxrow()/2)+0, 2 say padc("Press MAXIMIZE/RESTORE button to change dimension", maxcol()+1-4)
   @ int(maxrow()/2)+1, 2 say padc("Try also changing taskbar size/position", maxcol()+1-4)
   @ int(maxrow()/2)+3, 2 say padc("Press any key to redraw screen", maxcol()+1-4)
   @ int(maxrow()/2)+4, 2 say padc("Press ESC to quit", maxcol()+1-4)
   diminfo()
return

function WVW_SIZE(nWinNum, hWnd, message, wParam, lParam)
* this function is called by gtwvw AFTER the size is changed
* WARNING: screen repainting is not performed completely by gtwvw at this point of call
local cScreen
local lNeedReset := .f., ;
      maxsavedscrrow, maxsavedscrcol
   if !s_lSizeReady
      * program is not ready to handle window resizing
      * (or this function is currently running)
      return NIL
   endif
   if nWinNum<>0
      * only care about Main Window
      return NIL
   endif

   * avoid reentrance
   s_lSizeReady := .f.

   do case
      case wParam == 2 //SIZE_MAXIMIZED
         //alert("MAXIMIZE")
         * reset is required only if we are changing size
         lNeedReset := maxcol() <> wvw_maxmaxcol();
                       .or. maxrow() <> wvw_maxmaxrow()

         if lNeedReset
            maxsavedscrrow := min(min(s_nNormalMaxrow, wvw_maxmaxrow()),maxrow())
            maxsavedscrcol := min(min(s_nNormalMaxcol, wvw_maxmaxcol()),maxcol())
            cScreen := savescreen(0,0,maxsavedscrrow, maxsavedscrcol)
            if setmode(wvw_maxmaxrow()+1, wvw_maxmaxcol()+1) //adjust maxrow() & maxcol()
               restscreen(0,0,maxsavedscrrow, maxsavedscrcol, cScreen)
            endif
            diminfo()  //updatescr()
         endif
      case wParam == 0 //SIZE_RESTORED
         //alert("RESTORE")
         lNeedReset := maxcol() <> s_nNormalMaxcol .or.;
                       maxrow() <> s_nNormalMaxrow
         if lNeedReset
            maxsavedscrrow := min(s_nNormalMaxrow, maxrow())
            maxsavedscrcol := min(s_nNormalMaxcol, maxcol())
            cScreen := savescreen(0,0,maxsavedscrrow, maxsavedscrcol)
            if setmode(s_nNormalMaxrow+1,s_nNormalMaxcol+1)
               restscreen(0,0,maxsavedscrrow, maxsavedscrcol, cScreen)
            endif
            diminfo()  //updatescr()
         endif
      otherwise
         * do nothing
   endcase

   * allow next call
   s_lSizeReady := .t.
return NIL