381 lines
11 KiB
Plaintext
381 lines
11 KiB
Plaintext
/*
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* $Id$
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*/
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/*
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* Harbour Project source code:
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* DBEDIT() function
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*
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* Copyright 1999 {list of individual authors and e-mail addresses}
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* www - http://www.harbour-project.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA (or visit the web site http://www.gnu.org/).
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*
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* As a special exception, the Harbour Project gives permission for
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* additional uses of the text contained in its release of Harbour.
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*
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* The exception is that, if you link the Harbour libraries with other
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* files to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the Harbour library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the Harbour
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* Project under the name Harbour. If you copy code from other
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* Harbour Project or Free Software Foundation releases into a copy of
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* Harbour, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for Harbour, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice.
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*
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*/
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#include "common.ch"
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#include "dbedit.ch"
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#include "inkey.ch"
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#include "setcurs.ch"
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#define HB_DBEMPTY() ( LastRec() == 0 .OR. ( ( Eof() .OR. RecNo() == LastRec() + 1 ) .AND. Bof() ) )
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/* NOTE: Extension: Harbour supports codeblocks as the xUserFunc parameter
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[vszakats] */
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/* NOTE: Clipper is buggy and will throw an error if the number of
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columns is zero. (Check: dbEdit(0,0,20,20,{})) [vszakats] */
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/* NOTE: Clipper will throw an error if there's no database open [vszakats] */
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/* NOTE: The NG says that the return value is NIL, but it's not. [vszakats] */
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/* NOTE: There's an undocumented result code in Clipper (3), which is not
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supported in Harbour. [vszakats] */
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/* NOTE: Harbour is multithreading ready/reentrant, Clipper is not.
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[vszakats] */
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FUNCTION dbEdit(;
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nTop,;
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nLeft,;
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nBottom,;
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nRight,;
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acColumns,;
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xUserFunc,;
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xColumnSayPictures,;
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xColumnHeaders,;
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xHeadingSeparators,;
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xColumnSeparators,;
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xFootingSeparators,;
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xColumnFootings )
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LOCAL oBrowse
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LOCAL nKey
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LOCAL bAction
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LOCAL lException
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LOCAL nOldCursor
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LOCAL nPos
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LOCAL nColCount
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LOCAL oColumn
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LOCAL nAliasPos
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LOCAL cAlias
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LOCAL cFieldName
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LOCAL cHeading
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LOCAL cBlock
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LOCAL bBlock
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IF !Used()
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RETURN .F.
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ENDIF
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/* ------------------------------------------------------ */
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/* Set up the environment, evaluate the passed parameters */
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/* ------------------------------------------------------ */
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IF !ISNUMBER( nTop ) .OR. nTop < 0
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nTop := 0
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ENDIF
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IF !ISNUMBER( nLeft ) .OR. nLeft < 0
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nLeft := 0
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ENDIF
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IF !ISNUMBER( nBottom ) .OR. nBottom > MaxRow() .OR. nBottom < nTop
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nBottom := MaxRow()
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ENDIF
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IF !ISNUMBER( nRight ) .OR. nRight > MaxCol() .OR. nRight < nLeft
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nRight := MaxCol()
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ENDIF
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oBrowse := TBrowseDB( nTop, nLeft, nBottom, nRight )
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oBrowse:SkipBlock := {| nRecs | dbEditSkipped( nRecs ) }
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oBrowse:HeadSep := iif( ISCHARACTER( xHeadingSeparators ), xHeadingSeparators, Chr( 205 ) + Chr( 209 ) + Chr( 205 ) )
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oBrowse:ColSep := iif( ISCHARACTER( xColumnSeparators ), xColumnSeparators, " " + Chr( 179 ) + " " )
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oBrowse:FootSep := iif( ISCHARACTER( xFootingSeparators ), xFootingSeparators, "" )
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oBrowse:AutoLite := .F.
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// Calculate the number of columns
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IF ISARRAY( acColumns )
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nColCount := Len( acColumns )
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nPos := 1
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DO WHILE nPos <= nColCount .AND. ISCHARACTER( acColumns[ nPos ] ) .AND. !Empty( acColumns[ nPos ] )
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nPos++
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ENDDO
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nColCount := nPos - 1
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IF nColCount == 0
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RETURN .F.
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ENDIF
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ELSE
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nColCount := FCount()
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ENDIF
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// Generate the TBrowse columns
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FOR nPos := 1 TO nColCount
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IF ISARRAY( acColumns )
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IF ( nAliasPos := At( "->", acColumns[ nPos ] ) ) > 0
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cAlias := SubStr( acColumns[ nPos ], 1, nAliasPos - 1 )
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cFieldName := SubStr( acColumns[ nPos ], nAliasPos + 2 )
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cHeading := cAlias + "->;" + cFieldName
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ELSE
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cHeading := acColumns[ nPos ]
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ENDIF
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cBlock := acColumns[ nPos ]
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ELSE
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cBlock := FieldName( nPos )
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cHeading := cBlock
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ENDIF
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IF Type( cBlock ) == "M"
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bBlock := {|| " <Memo> " }
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ELSEIF "->" $ cBlock
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IF Upper( cAlias ) == "M"
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bBlock := MemvarBlock( cBlock )
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ELSEIF Upper( cAlias ) == "FIELD"
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bBlock := FieldWBlock( cFieldName, Select() )
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ELSE
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bBlock := FieldWBlock( cFieldName, Select( cAlias ) )
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ENDIF
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ELSEIF !Empty( FieldPos( cBlock ) )
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bBlock := FieldWBlock( cBlock, Select() )
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ELSE
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bBlock := NIL
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ENDIF
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IF bBlock == NIL
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bBlock := &( "{||" + cBlock + "}" )
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ENDIF
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IF ISARRAY( xColumnHeaders ) .AND. Len( xColumnHeaders ) >= nPos .AND. ISCHARACTER( xColumnHeaders[ nPos ] )
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cHeading := xColumnHeaders[ nPos ]
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ELSEIF ISCHARACTER( xColumnHeaders )
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cHeading := xColumnHeaders
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ENDIF
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//
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oColumn := TBColumnNew( cHeading, bBlock )
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IF ISARRAY( xColumnSayPictures ) .AND. nPos <= Len( xColumnSayPictures ) .AND. ISCHARACTER( xColumnSayPictures[ nPos ] ) .AND. !Empty( xColumnSayPictures[ nPos ] )
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oColumn:Picture := xColumnSayPictures[ nPos ]
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ELSEIF ISCHARACTER( xColumnSayPictures ) .AND. !Empty( xColumnSayPictures )
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oColumn:Picture := xColumnSayPictures
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ENDIF
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IF ISARRAY( xColumnFootings ) .AND. nPos <= Len( xColumnFootings ) .AND. ISCHARACTER( xColumnFootings[ nPos ] )
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oColumn:Footing := xColumnFootings[ nPos ]
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ELSEIF ISCHARACTER( xColumnFootings )
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oColumn:Footing := xColumnFootings
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ENDIF
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IF ISARRAY( xHeadingSeparators ) .AND. nPos <= Len( xHeadingSeparators ) .AND. ISCHARACTER( xHeadingSeparators[ nPos ] )
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oColumn:HeadSep := xHeadingSeparators[ nPos ]
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ENDIF
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IF ISARRAY( xColumnSeparators ) .AND. nPos <= Len( xColumnSeparators ) .AND. ISCHARACTER( xColumnSeparators[ nPos ] )
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oColumn:ColSep := xColumnSeparators[ nPos ]
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ENDIF
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IF ISARRAY( xFootingSeparators ) .AND. nPos <= Len( xFootingSeparators ) .AND. ISCHARACTER( xFootingSeparators[ nPos ] )
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oColumn:FootSep := xFootingSeparators[ nPos ]
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ENDIF
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oBrowse:AddColumn( oColumn )
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NEXT
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/* --------------------------- */
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/* Go into the processing loop */
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/* --------------------------- */
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IF Eof()
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dbGoBottom()
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ENDIF
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nOldCursor := SetCursor( SC_NONE )
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lException := .F.
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DO WHILE .T.
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DO WHILE !oBrowse:Stabilize() .AND. NextKey() == 0
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ENDDO
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IF ( nKey := InKey() ) == 0
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IF !lException
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IF !dbEditCallUser( oBrowse, xUserFunc, 0 )
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oBrowse:forceStable()
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EXIT
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ENDIF
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oBrowse:forceStable()
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ENDIF
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oBrowse:Hilite()
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nKey := InKey( 0 )
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oBrowse:DeHilite()
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IF ( bAction := SetKey( nKey ) ) != NIL
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Eval( bAction, ProcName( 1 ), ProcLine( 1 ), "" )
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LOOP
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ENDIF
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ENDIF
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lException := .F.
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DO CASE
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CASE nKey == K_DOWN ; oBrowse:Down()
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CASE nKey == K_UP ; oBrowse:Up()
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CASE nKey == K_PGDN ; oBrowse:PageDown()
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CASE nKey == K_PGUP ; oBrowse:PageUp()
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CASE nKey == K_CTRL_PGUP ; oBrowse:GoTop()
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CASE nKey == K_CTRL_PGDN ; oBrowse:GoBottom()
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CASE nKey == K_RIGHT ; oBrowse:Right()
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CASE nKey == K_LEFT ; oBrowse:Left()
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CASE nKey == K_HOME ; oBrowse:Home()
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CASE nKey == K_END ; oBrowse:End()
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CASE nKey == K_CTRL_LEFT ; oBrowse:PanLeft()
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CASE nKey == K_CTRL_RIGHT ; oBrowse:PanRight()
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CASE nKey == K_CTRL_HOME ; oBrowse:PanHome()
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CASE nKey == K_CTRL_END ; oBrowse:PanEnd()
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OTHERWISE
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IF !dbEditCallUser( oBrowse, xUserFunc, nKey )
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EXIT
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ENDIF
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lException := .T.
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ENDCASE
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ENDDO
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SetCursor( nOldCursor )
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RETURN .T.
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STATIC FUNCTION dbEditCallUser( oBrowse, xUserFunc, nKey )
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LOCAL nMode
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LOCAL nResult
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LOCAL nPrevRecNo
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DO CASE
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CASE nKey != 0 ; nMode := DE_EXCEPT
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CASE HB_DBEMPTY() ; nMode := DE_EMPTY
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CASE oBrowse:hitBottom() ; nMode := DE_HITBOTTOM
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CASE oBrowse:hitTop() ; nMode := DE_HITTOP
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OTHERWISE ; nMode := DE_IDLE
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ENDCASE
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oBrowse:forceStable()
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nPrevRecNo := RecNo()
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IF ( ISCHARACTER( xUserFunc ) .AND. !Empty( xUserFunc ) ) .OR. ISBLOCK( xUserFunc )
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nResult := Do( xUserFunc, nMode, oBrowse:ColPos() )
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ELSE
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nResult := iif( nKey == K_ENTER .OR. nKey == K_ESC, DE_ABORT, DE_CONT )
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ENDIF
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IF Eof() .AND. !HB_DBEMPTY()
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dbSkip( -1 )
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ENDIF
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IF nResult == DE_REFRESH .OR. nPrevRecNo != RecNo()
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IF nResult != DE_ABORT
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IF Set( _SET_DELETED ) .AND. Deleted() .OR. !Empty( dbFilter() ) .AND. ! &( dbFilter() )
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dbSkip( 1 )
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ENDIF
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IF Eof()
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dbGoBottom()
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ENDIF
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nPrevRecNo := RecNo()
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oBrowse:RefreshAll():forceStable()
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DO WHILE nPrevRecNo != RecNo()
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oBrowse:Up():forceStable()
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ENDDO
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ENDIF
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ELSE
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oBrowse:Refreshcurrent()
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ENDIF
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RETURN nResult != DE_ABORT
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STATIC FUNCTION dbEditSkipped( nRecs )
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LOCAL nSkipped := 0
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IF LastRec() != 0
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IF nRecs == 0
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IF Eof()
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dbSkip( -1 )
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nSkipped := -1
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ELSE
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dbSkip( 0 )
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ENDIF
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ELSEIF nRecs > 0 .AND. RecNo() != LastRec() + 1
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DO WHILE nSkipped < nRecs
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dbSkip( 1 )
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IF Eof()
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dbSkip( -1 )
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EXIT
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ENDIF
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nSkipped++
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ENDDO
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ELSEIF nRecs < 0
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DO WHILE nSkipped > nRecs
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dbSkip( -1 )
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IF Bof()
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EXIT
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ENDIF
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nSkipped--
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ENDDO
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ENDIF
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ENDIF
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RETURN nSkipped
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