/*******
*
*  shadow.prg
*
*  Collection for working with shadowed windows
*
*  Autor : Ludvik Medve{ek, Ljubljana, 28.03.1992
*          ludvik.medvesek@siol.net
*          http://members.xoom.com/lmedvesek/
*
*******/
#include "Set.ch"
#include "Inkey.ch"
#include "Setcurs.ch"

// Global Array for storing windows
STATIC aWin := {}, nEl := 0

*******************************************************************************
FUNC ErrMess(aMess,nDelay,cColor,nAttr,lBeep)
// Dialog for displaying error messages
// It waits <nDelay> number of second or until key is pressed
// It beeps, but it can be turned off
  LOCAL nCurs:=SetCursor(SC_NONE), cCol:=SetColor()

  IF (ValType(nDelay)!="N") ; nDelay:=3 ; END
  IF cColor==NIL ; cColor:=M->cHlp_2 ; END
  MsgOn(aMess,cColor,nAttr)
  IF (lBeep != .F.)
    Tone(400,3) ; Tone(200,3) ; Tone(400,3) ; Tone(200,3) ; Tone(400,3)
  ENDIF
  InKey(nDelay)
  SetCursor(nCurs)
  SetColor(cCol)
  MsgOff()

RETURN NIL
*******************************************************************************
FUNC MsgOn(aText,cColor,nAttr)
// Displays message window in the center of screen
  LOCAL aWindow:={0,0,0,0}, aMess:={}
  LOCAL nMaxLen:=0, nI:=0

  // Converts everything in array of characters
  aMess:=MakeArr(aText)
  // Find longest element
  FOR nI:=1 TO Len(aMess)
    nMaxLen:=;
      IF(Len(All2Str(aMess[nI])) > nMaxLen, Len(All2Str(aMess[nI])), nMaxLen)
  NEXT
  nMaxLen += 4
  // Center all text and calculate coordinates
  aWindow[1] := Int((23 - Len(aMess))/2)
  aWindow[2] := Int(40 - nMaxLen/2)
  aWindow[3] := aWindow[1] + Len(aMess) + 1
  aWindow[4] := aWindow[2] + nMaxLen + 1
  // Draw window and display messages
  WinShade(aWindow[1],aWindow[2],aWindow[3],aWindow[4],'ON',nAttr,1,cColor)
  FOR nI:=1 TO Len(aMess)
    SetPos(aWindow[1]+nI,aWindow[2]+1)
    DispOut(PadC(aMess[nI],nMaxLen),cColor)
  NEXT

RETURN NIL
******************************************************************************
FUNC FileInp(cFile,cText)
// Input file name
  LOCAL cIme:=PadR(Upper(cFile),50)
  IF(cText==NIL,cText:="Vnesite ime datoteke",)
RETURN AllTrim(MsgInp({"","",cText,"",""},cIme))
******************************************************************************
FUNC MsgInp(aText,xGet,cColor,nAttr)
// Input of one field with message
  MEMVAR pxGet
  LOCAL aWindow:={0,0,0,0}, aMess:={}
  LOCAL nMaxLen:=0, nI:=0, GetList:={}
  PRIVATE pxGet:=xGet

  // Convert everything in array of characters
  Aadd(aText,pxGet)
  aMess:=MakeArr(aText)
  // Find longest string
  FOR nI:=1 TO Len(aMess)
    nMaxLen:=;
      IF(Len(All2Str(aMess[nI])) > nMaxLen, Len(All2Str(aMess[nI])), nMaxLen)
  NEXT
  nMaxLen += 4
  // Center all text and calculate coordinates
  aWindow[1] := Int((23 - Len(aMess))/2)
  aWindow[2] := Int(40 - nMaxLen/2)
  aWindow[3] := aWindow[1] + Len(aMess) + 1
  aWindow[4] := aWindow[2] + nMaxLen + 1
  // Draw window and display messages
  WinShade(aWindow[1],aWindow[2],aWindow[3],aWindow[4],'ON',nAttr,1,cColor)
  FOR nI:=1 TO Len(aMess)-1
    SetPos(aWindow[1]+nI,aWindow[2]+1)
    DispOut(PadC(aMess[nI],nMaxLen),cColor)
  NEXT
  @ aWindow[1]+Len(aMess),;
           aWindow[2]+((nMaxLen-Len(All2Str(pxGet)))/2) GET pxGet
  SetInsCurs()
  SetKey(K_INS, InsBlock() )
  READ
  SetCursor( SC_NONE )
  SetKey(K_INS, NIL )
  WinShade("OFF")

RETURN pxGet
******************************************************************************
STATIC func MakeArr(xArray)
// Convert everything into array
  LOCAL xTmp:={}

  IF ValType(xArray)=="A"
    xTmp:=xArray
  ELSE
    Aadd(xTmp,xArray)
  ENDIF

RETURN xTmp
******************************************************************************
FUNC All2Str(xVal)
// Convert everything into string
  LOCAL cVal:=""

  DO CASE
    CASE ValType(xVal)=="C"
      cVal := xVal
    CASE ValType(xVal)=="N"
      cVal := AllTrim(Str(xVal))
    CASE ValType(xVal)=="D"
      cVal := Dtoc(xVal)
    CASE ValType(xVal)=="L"
      cVal := IF(xVal,".T.",".F.")
    CASE ValType(xVal)=="U"
      cVal := ""
  ENDCASE

RETURN (cVal)
*******************************************************************************
FUNC MsgOff()
// Remove message from screen

  WinShade('OFF')

RETURN NIL
*******************************************************************************
FUNC WinShade(nT,nL,nB,nR,cSet,cShdCol,cnBox,cColor)
// Push window on internal stack and draw shadow
  LOCAL  nAttrib:=7, lShadow:=.T., cOldCol:=SetColor()

  // See if window needs to be removed from stack and deleted from screen
  IF ValType(nT)=="C" ; cSet:=nT ; END
  // Set default color for shadow to W/N (7)
  IF ValType(cShdCol) == "C"
    IF Upper(cShdCol) == "NOSHADOW"
      lShadow:=.F.
    ELSE
      nAttrib:=Col2Attr(cShdCol)
    ENDIF
  ELSEIF ValType(cShdCol) == "N"
    nAttrib:=cShdCol
  ENDIF
  IF (cnBox == NIL ) ; cnBox:=SPACE(9) ; END
  IF cSet == 'ON' .OR. cSet == 'PUT'
     IF cSet == 'ON'
       Aadd(aWin, {SaveScreen(nT,nL,nB+1,nR+2),nT,nL,nB,nR} )
       nEl++
     ENDIF
     IF lShadow == .T. ; fShadow(nT,nL,nB,nR,nAttrib) ; END
     if (cColor != NIL) ; SetColor(cColor) ; end
     Scroll(nT,nL,nB,nR)
     DispBox(nT,nL,nB,nR,cnBox,cColor)
  ELSE
     IF cSet == 'OFF'
       RestScreen(aWin[nEl,2],aWin[nEl,3],aWin[nEl,4]+1,;
                  aWin[nEl,5]+2,aWin[nEl,1])
     END
     Adel(aWin, nEl )
     Asize(aWin, --nEl)
  ENDIF
  SetColor(cOldCol)

RETURN NIL
*******************************************************************************
STATIC FUNC fShadow(nT,nL,nB,nR,nAttr)
// Drawing shadow on the edges of window
  f_Shadow(nB+1,nL+2,nB+1,nR+2,nAttr)
  f_Shadow(nT+1,nR+1,nB+1,nR+2,nAttr)

Return NIL
*******************************************************************************
STATIC func f_Shadow(y1,x1,y2,x2,nAttrib)
// Draw shadow on area

  LOCAL cScr:=SaveScreen(y1,x1,y2,x2)
  RestScreen(y1,x1,y2,x2,Transform(cScr,;
                         Replicate("X"+CHR(nAttrib),Len(cScr)/2)))

Return NIL
*******************************************************************************
FUNC fWX(nX)
// Calculate relative column
RETURN IF(nX!=NIL,aWin[nEl,3]+nX,aWin[nEl,3])
*******************************************************************************
FUNC fWY(nY)
// Calculate relative row
RETURN IF(nY!=NIL,aWin[nEl,2]+nY,aWin[nEl,2])
*******************************************************************************
FUNC WinTitle(cTitle,cColor)
// Draw title of window
  LOCAL cCol:=IF(cColor==NIL,SetColor(),cColor)

  SetPos( fWY(0), Center(cTitle, aWin[nEl,3], aWin[nEl,5]) )
  DispOut( cTitle, cCol )

RETURN NIL
*******************************************************************************
FUNC WinMsgBar(nPX,cTxt,cCol)
  // Drow message in bottom line of window
  LOCAL nY:=aWin[nEl,4], nX:=Center(cTxt, aWin[nEl,3], aWin[nEl,5])

  IF nPX != NIL ; nX:=aWin[nEl,5]-nPX-Len(cTxt) ; ENDIF
  SetPos(nY,nX)
  DispOut(cTxt, IF(cCol==NIL,SetColor(),cCol) )

RETURN NIL
*******************************************************************************
FUNC WinSay(nY,nX,cTxt,cCol)
// Display text in window with relative coordinates
  SetPos( fWY(nY), fWX(nX) )
  DispOut(cTxt, IF(cCol==NIL,SetColor(),cCol) )
RETURN NIL
*******************************************************************************
STATIC FUNC Col2Attr(cColor)
// Conver color string in numeric attribute
  LOCAL nAttr:=0,nHigh,nBlink,cFore,cBack

  nAttr := IF("+" $ cColor,8,0)
  nAttr += IF("*" $ cColor,128,0)
  cColor:= Upper(cColor)
  cFore := SubStr(cColor,1,At("/",cColor)-1)
  cBack := SubStr(cColor,At("/",cColor)+1)
  nAttr += IF("B" $ cFore,1,0)
  nAttr += IF("G" $ cFore,2,0)
  nAttr += IF("R" $ cFore,4,0)
  nAttr += IF("W" $ cFore,7,0)
  nAttr += IF("B" $ cBack,16,0)
  nAttr += IF("G" $ cBack,32,0)
  nAttr += IF("R" $ cBack,64,0)
  nAttr += IF("W" $ cBack,112,0)

RETURN (nAttr)
*******************************************************************************
FUNCTION SetInsCurs()
// Change cursor
  SetCursor( IF( ReadInsert(), SC_INSERT, SC_NORMAL) )
RETURN NIL
******************************************************************************

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