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harbour-core/harbour/source/rtl/menuto.prg
Viktor Szakats 9c7c77bc85 2009-09-15 17:42 UTC+0200 Viktor Szakats (harbour.01 syenar.hu)
* tests/menutest.prg
    ! Deleted COLOR keywords from examples. This seems to be an xhb 
      extension no present in Harbour or Clipper.

  * source/rtl/menuto.prg
    + Added NOTE documenting the __ATPROMPT() cColor parameter is 
      a Harbour extension. (it's valid because this is an 
      undocumented/internal function)

  * contrib/xhb/hbcompat.ch
    + Added @ PROMPT + COLOR keyword.
      Please test, I don't know if it collides with std.ch definition.
2009-09-15 15:44:56 +00:00

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/*
* $Id$
*/
/*
* Harbour Project source code:
* PROMPT/MENU TO commands
*
* Released to Public Domain by Phil Barnett <philb@iag.net>
* www - http://www.harbour-project.org
*
*/
/* NOTE: Recursive use is supported. */
#include "color.ch"
#include "common.ch"
#include "inkey.ch"
#include "hbmemvar.ch"
#include "setcurs.ch"
#xtranslate COLORARRAY( <x> ) => &( '{"' + StrTran( <x>, ',', '","' ) + '"}' )
THREAD STATIC t_aLevel := {}
THREAD STATIC t_nPointer := 1
/* NOTE: <cColor> parameter is a Harbour extension. */
FUNCTION __AtPrompt( nRow, nCol, cPrompt, cMsg, cColor )
IF t_nPointer < 1
t_nPointer := 1
ENDIF
// add the current level empty array.
DO WHILE Len( t_aLevel ) < t_nPointer
AAdd( t_aLevel, {} )
ENDDO
// add to the static array
AAdd( t_aLevel[ t_nPointer ], { nRow, nCol, cPrompt, cMsg, cColor } )
// put this prompt on the screen right now
DispOutAt( nRow, nCol, cPrompt, cColor )
RETURN .F.
FUNCTION __MenuTo( bBlock, cVariable )
LOCAL nKey
LOCAL y
LOCAL q
LOCAL n
LOCAL lExit
LOCAL nArrLen
LOCAL xMsg
LOCAL nMsgCol
LOCAL nMsgRow
LOCAL lMsgCenter
LOCAL nSaveCursor
LOCAL cSaveReadVar
LOCAL lDeclared
LOCAL bAction
#ifdef HB_COMPAT_C53
LOCAL nMouseClik
#endif
LOCAL nPointer
LOCAL aColor
LOCAL cBackColor
LOCAL cFrontColor
// Detect if a memvar was passed
lDeclared := !__mvEXIST( cVariable )
IF lDeclared
__mvPUBLIC( cVariable )
ENDIF
n := Eval( bBlock )
// if no prompts were defined, exit with 0
IF t_nPointer < 1 .OR. t_nPointer > Len( t_aLevel )
n := 0
ELSE
t_nPointer ++
nPointer := t_nPointer
nArrLen := Len( t_aLevel[ nPointer - 1 ] )
// put choice in a valid range
IF !ISNUMBER( n ) .OR. n < 1
n := 1
ENDIF
IF n > nArrLen
n := nArrLen
ENDIF
//
nSaveCursor := SetCursor( iif( Set( _SET_INTENSITY ), SC_NONE, NIL ) )
cSaveReadVar := ReadVar( Upper( cVariable ) )
xMsg := ""
nMsgCol := 0
nMsgRow := Set( _SET_MESSAGE )
lMsgCenter := Set( _SET_MCENTER )
lExit := .F.
DO WHILE n != 0
// should we display messages?
IF nMsgRow > 0
IF ! Empty( xMsg )
DispOutAt( nMsgRow, nMsgCol, Space( Len( xMsg ) ) )
ENDIF
xMsg := t_aLevel[ nPointer - 1, n, 4 ]
// Code Block messages ( yes, they are documented! )
IF ISBLOCK( xMsg )
xMsg := Eval( xMsg )
ENDIF
IF !ISCHARACTER( xMsg )
xMsg := ""
ENDIF
IF lMsgCenter
nMsgCol := Int( ( MaxCol() - Len( xMsg ) ) / 2 )
ENDIF
DispOutAt( nMsgRow, nMsgCol, xMsg )
ENDIF
// save the current row
q := n
IF t_aLevel[ t_nPointer - 1, n, 5 ] != NIL
aColor := COLORARRAY( t_aLevel[ t_nPointer - 1, n, 5 ] )
cFrontColor := iif( Empty( aColor[ 1 ] ), NIL, aColor[ 1 ] )
cBackColor := iif( Len( aColor ) > 1, aColor[ 2 ], NIL )
ENDIF
IF Set( _SET_INTENSITY )
IF cBackColor == NIL // Only select Color Enhace if no color was passed
ColorSelect( CLR_ENHANCED )
ENDIF
ENDIF
// highlight the prompt
DispOutAt( t_aLevel[ nPointer - 1, n, 1 ],;
t_aLevel[ nPointer - 1, n, 2 ],;
t_aLevel[ nPointer - 1, n, 3 ],;
cBackColor )
IF Set( _SET_INTENSITY )
IF cFrontColor == NIL // Only select Color Enhace if no color was passed
ColorSelect( CLR_STANDARD )
ENDIF
ENDIF
IF lExit
EXIT
ENDIF
nKey := 0
DO WHILE nKey == 0
// wait for a keystroke
nKey := Inkey( 0 )
IF ( bAction := SetKey( nKey ) ) != NIL
Eval( bBlock, n )
Eval( bAction, ProcName( 1 ), ProcLine( 1 ), Upper( cVariable ) )
n := Eval( bBlock )
IF n < 1
n := 1
ELSEIF n > nArrLen
n := nArrLen
ENDIF
nKey := 0
ENDIF
ENDDO
// check for keystrokes
SWITCH nKey
#ifdef HB_COMPAT_C53
CASE K_MOUSEMOVE
EXIT
CASE K_LBUTTONDOWN
CASE K_LDBLCLK
IF ( nMouseClik := HitTest( t_aLevel[ nPointer - 1 ], ;
MRow(), MCol() ) ) > 0
n := nMouseClik
ENDIF
IF nKey == K_LDBLCLK
lExit := .T.
ENDIF
EXIT
#endif
CASE K_DOWN
CASE K_RIGHT
IF ++n > nArrLen
n := iif( Set( _SET_WRAP ), 1, nArrLen )
ENDIF
EXIT
CASE K_UP
CASE K_LEFT
IF --n < 1
n := iif( Set( _SET_WRAP ), nArrLen, 1 )
ENDIF
EXIT
CASE K_HOME
n := 1
EXIT
CASE K_END
n := nArrLen
EXIT
CASE K_ENTER
CASE K_PGUP
CASE K_PGDN
lExit := .T.
EXIT
CASE K_ESC
n := 0
EXIT
OTHERWISE
// did user hit a hot key?
FOR y := 1 TO nArrLen
IF Upper( Left( LTrim( t_aLevel[ nPointer - 1, y, 3 ] ), 1 ) ) == Upper( Chr( nKey ) )
n := y
lExit := .T.
EXIT
ENDIF
NEXT
ENDSWITCH
IF n != 0
DispOutAt( t_aLevel[ nPointer - 1, q, 1 ],;
t_aLevel[ nPointer - 1, q, 2 ],;
t_aLevel[ nPointer - 1, q, 3 ],;
cFrontColor )
ENDIF
ENDDO
ReadVar( cSaveReadVar )
SetCursor( nSaveCursor )
t_nPointer := nPointer
t_nPointer --
ASize( t_aLevel, t_nPointer - 1 )
ENDIF
Eval( bBlock, n )
IF lDeclared
__mvXRELEASE( cVariable )
ENDIF
SetPos( MaxRow() - 1, 0 )
RETURN n
#ifdef HB_COMPAT_C53
STATIC FUNCTION HitTest( aMenu, nMRow, nMCol )
LOCAL aMenuItem
FOR EACH aMenuItem IN aMenu
IF nMRow == aMenuItem[ 1 ] .AND. ;
nMCol >= aMenuItem[ 2 ] .AND. ;
nMCol < aMenuItem[ 2 ] + Len( aMenuItem[ 3 ] )
RETURN aMenuItem:__enumIndex()
ENDIF
NEXT
RETURN 0
#endif