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vertmenu.prg
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1991-08-15
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/*
* File......: VERTMENU.PRG
* Author....: Greg Lief
* CIS ID....: 72460,1760
* Date......: $Date: 15 Aug 1991 23:04:48 $
* Revision..: $Revision: 1.1 $
* Log file..: $Logfile: E:/nanfor/src/vertmenu.prv $
*
* This function is an original work by Mr. Grump and is placed in the
* public domain.
*
* Modification history:
* ---------------------
*
* $Log: E:/nanfor/src/vertmenu.prv $
*
* Rev 1.1 15 Aug 1991 23:04:48 GLENN
* Forest Belt proofread/edited/cleaned up doc
*
* Rev 1.0 01 Apr 1991 01:02:26 GLENN
* Nanforum Toolkit
*
*/
/* $DOC$
* $FUNCNAME$
* FT_MENU2()
* $CATEGORY$
* Menus/Prompts
* $ONELINER$
* Vertical lightbar menu
* $SYNTAX$
* FT_MENU2( <aMenuarray> [, <cColors> ] ) -> NIL
* $ARGUMENTS$
* <aMenuarray> is an array of menu options, messages, and action
* blocks.
*
* Each element in this array is a nested array with the structure:
*
* element[x, 1] = menu option
* element[x, 2] = message to be displayed when option is highlighted
* element[x, 3] = code block to be executed when option is selected
*
* <cColors> is a string containing colors for the prompts, in the same
* format as that returned by Set( _SET_COLOR ). If not supplied,
* colors default to the current color setting.
* $RETURNS$
* NIL
* $DESCRIPTION$
* This function greatly simplifies the process of displaying light-bar
* menus. All prompts are padded out with spaces so they are the same
* length, a box is drawn around the prompts, the box is automatically
* centered on the screen, and the underlying screen is restored after
* a menu selection has been made.
*
* Additionally, because you can tie action blocks to each menu
* option, you can save on a lot of DO CASE or IF..ELSEIF code in your
* main program. See the test code for a succinct demonstration.
* $EXAMPLES$
* LOCAL mainmenu := ;
* { { "Data Entry", "Enter data", { || FT_MENU2(datamenu) } }, ;
* { "Reports", "Hard copy", { || FT_MENU2(repmenu) } }, ;
* { "Maintenance","Reindex files",{ || FT_MENU2(maintmenu) } }, ;
* { "Quit", "See ya later" } }
* FT_MENU2(mainmenu)
* $END$
*/
#include "box.ch"
// test code
#ifdef FT_TEST
FUNCTION MAIN
LOCAL MAINMENU := ;
{ { "DATA ENTRY", "ENTER DATA", { || FT_MENU2(datamenu) } }, ;
{ "Reports", "Hard copy", { || FT_MENU2(repmenu) } }, ;
{ "Maintenance","Reindex files, etc.",{ || FT_MENU2(maintmenu) } }, ;
{ "Quit", "See ya later" } }
local datamenu := { { "Customers", , { || cust() } } , ;
{ "Invoices", , { || inv() } } , ;
{ "Vendors", , { || vendors() } }, ;
{ "Exit", "Return to Main Menu" } }
local repmenu := { { "Customer List", , { || custrep() } } , ;
{ "Past Due", , { || pastdue() } } , ;
{ "Weekly Sales", , { || weeksales() } }, ;
{ "Monthly P&L", , { || monthpl() } } , ;
{ "Vendor List", , { || vendorrep() } }, ;
{ "Exit", "Return to Main Menu" } }
local maintmenu := { { "Reindex", "Rebuild index files", { || re_ntx() } } , ;
{ "Backup", "Backup data files" , { || backup() } } , ;
{ "Compress", "Compress data files", { || compress()} }, ;
{ "Exit", "Return to Main Menu" } }
FT_MENU2(mainmenu)
return nil
/* stub functions to avoid missing symbols */
static function cust
static function inv
static function vendors
static function custrep
static function pastdue
static function weeksales
static function monthpl
static function vendorrep
static function re_ntx
static function backup
static function compress
#endif
/*
FT_MENU2(): display vertical menu
*/
FUNCTION ft_menu2( aMenuInfo, cColors )
LOCAL nChoice := 1 ,;
nOptions := Len( aMenuInfo ) ,;
nMaxwidth := 0 ,;
nLeft ,;
x ,;
cOldscreen ,;
nTop ,;
lOldwrap := Set( _SET_WRAP, .T. ) ,;
lOldcenter := Set( _SET_MCENTER, .T. ),;
lOldmessrow := Set( _SET_MESSAGE ) ,;
cOldcolor := Set( _SET_COLOR )
IF cColors # NIL
Set( _SET_COLOR, cColors )
ENDIF
/* if no message row has been established, use bottom row */
IF lOldmessrow == 0
Set( _SET_MESSAGE, Maxrow() )
ENDIF
/* determine longest menu option */
Aeval( aMenuInfo, { | ele | nMaxwidth := max( nMaxwidth, len( ele[1] ) ) } )
/* establish top and left box coordinates */
nLeft := ( ( Maxcol() + 1 ) - nMaxwidth ) / 2
nTop := ( ( Maxrow() + 1 ) - ( nOptions + 2 ) ) / 2
DO WHILE nChoice != 0 .AND. nChoice != nOptions
cOldscreen := Savescreen( nTop, nLeft - 1, nTop + nOptions + 1, nLeft + nMaxwidth )
@ nTop, nLeft - 1, nTop + nOptions + 1, nLeft + nMaxwidth BOX B_SINGLE + ' '
Devpos( nTop, nLeft )
FOR x := 1 to Len( aMenuInfo )
IF Len( aMenuInfo[x] ) > 1 .AND. aMenuInfo[x,2] != NIL
@ Row() + 1, nLeft PROMPT Padr( aMenuInfo[x, 1], nMaxwidth ) ;
MESSAGE aMenuInfo[x,2]
ELSE
@ Row() + 1, nLeft PROMPT Padr( aMenuInfo[x,1], nMaxwidth )
ENDIF
NEXT
MENU TO nChoice
Restscreen( nTop, nLeft - 1, nTop + nOptions + 1, nLeft + nMaxwidth, cOldscreen )
/* execute action block attached to this option if there is one */
IF nChoice > 0 .AND. Len( aMenuInfo[ nChoice ] ) == 3
Eval( aMenuInfo[nChoice,3] )
ENDIF
ENDDO
/* restore previous message and wrap settings */
Set( _SET_MESSAGE, lOldmessrow )
Set( _SET_MCENTER, lOldcenter )
Set( _SET_WRAP, lOldwrap )
Set( _SET_COLOR, cOldcolor )
RETURN NIL
* end of file: vertmenu.prg