250 lines
6.7 KiB
Plaintext
250 lines
6.7 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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* Quick Clipper Browse()
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*
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* Copyright 1999 Antonio Linares <alinares@fivetech.com>
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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 of the License, or
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* (at your option) any later version, with one exception:
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*
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* The exception is that if you link the Harbour Runtime Library (HRL)
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* and/or the Harbour Virtual Machine (HVM) with other files to produce
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* an executable, this does not by itself cause the resulting executable
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* to be covered by the GNU General Public License. Your use of that
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* executable is in no way restricted on account of linking the HRL
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* and/or HVM code into it.
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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 program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA (or visit
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* their web site at http://www.gnu.org/).
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*
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*/
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/*
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* The following parts are Copyright of the individual authors.
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* www - http://www.harbour-project.org
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*
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* Copyright 1999 Chen Kedem <niki@actcom.co.il>
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* Documentation
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*
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* See doc/license.txt for licensing terms.
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*
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*/
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#include "inkey.ch"
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/* $DOC$
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* $FUNCNAME$
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* BROWSE()
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* $CATEGORY$
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* Data input and output
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* $ONELINER$
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* Browse a database file
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* $SYNTAX$
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* BROWSE( [<nTop>, <nLeft>, <nBottom>, <nRight>] ) --> lOk
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* $ARGUMENTS$
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* <nTop> coordinate for top row display.
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*
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* <nLeft> coordinate for left column display.
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*
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* <nBottom> coordinate for bottom row display.
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*
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* <nRight> coordinate for right column display.
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* $RETURNS$
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* BROWSE() return .F. if there is no database open in this work area,
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* else it return .T.
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* $DESCRIPTION$
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* BROWSE() is a general purpose database browser, without any
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* thinking you can browse a file using the following keys:
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*
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* Left - Move one column to the left (previous field)
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* Right - Move one column to the right (next field)
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* Up - Move up one row (previous record)
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* Down - Move down one row (next record)
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* Page-Up - Move to the previous screen
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* Page-Down - Move to the next screen
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* Ctrl Page-Up - Move to the top of the file
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* Ctrl Page-Down - Move to the end of the file
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* Home - Move to the leftmost visible column
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* End - Move to the rightmost visible column
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* Ctrl Left - Pan one column to the left
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* Ctrl Right - Pan one column to the right
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* Ctrl Home - Move to the leftmost column
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* Ctrl End - Move to the rightmost column
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* Esc - Terminate BROWSE()
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*
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* On top of the screen you see a status line with the following
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* indication:
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*
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* Record ###/### - Current record number / Total number of records.
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* <none> - There are no records, the file is empty.
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* <new> - You are in append mode at the bottom of file.
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* <Deleted> - Current record is deleted.
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* <bof> - You are at the top of file.
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*
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* You should pass whole four valid coordinate, if less than four
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* parameters are passed to BROWSE() the coordinate are default to:
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* 1, 0, MAXROW(), MAXCOL().
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* $EXAMPLES$
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* // this one shows you how to browse around
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* USE Around
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* BROWSE()
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* $TESTS$
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* $STATUS$
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* S
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* $COMPLIANCE$
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*
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* $SEEALSO$
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* DBEDIT(), TBrowse class
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* $END$
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*/
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function Browse( nTop, nLeft, nBottom, nRight )
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local oBrw
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local cOldScreen
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local n, nOldCursor
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local nKey := 0
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local lExit := .f.
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local lGotKey := .f.
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local bAction
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if ! Used()
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return .f.
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end
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if PCount() < 4
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nTop := 1
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nLeft := 0
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nBottom := MaxRow()
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nRight := MaxCol()
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endif
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nOldCursor = SetCursor( 0 )
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cOldScreen = SaveScreen( nTop, nLeft, nBottom, nRight )
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@ nTop, nLeft TO nBottom, nRight
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@ nTop + 3, nLeft SAY Chr( 198 )
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@ nTop + 3, nRight SAY Chr( 181 )
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@ nTop + 1, nLeft + 1 SAY Space( nRight - nLeft - 1 )
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oBrw = TBrowseDB( nTop + 2, nLeft + 1, nBottom - 1, nRight - 1 )
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oBrw:HeadSep = " " + Chr( 205 )
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for n = 1 to FCount()
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oBrw:AddColumn( TBColumnNew( FieldName( n ), FieldBlock( FieldName( n ) ) ) )
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next
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oBrw:ForceStable()
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while ! lExit
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if nKey == 0
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while !oBrw:stabilize() .and. NextKey() == 0
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enddo
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endif
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if NextKey() == 0
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Statline( oBrw )
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oBrw:forceStable()
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nKey := Inkey( 0 )
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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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else
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nKey := Inkey()
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endif
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do case
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case nKey == K_ESC
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lExit = .t.
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case nKey == K_UP
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oBrw:Up()
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case nKey == K_DOWN
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oBrw:Down()
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case nKey == K_END
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oBrw:End()
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case nKey == K_HOME
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oBrw:Home()
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case nKey == K_LEFT
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oBrw:Left()
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case nKey == K_RIGHT
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oBrw:Right()
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case nKey == K_PGUP
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oBrw:PageUp()
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case nKey == K_PGDN
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oBrw:PageDown()
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case nKey == K_CTRL_PGUP
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oBrw:GoTop()
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case nKey == K_CTRL_PGDN
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oBrw:GoBottom()
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case nKey == K_CTRL_LEFT
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oBrw:panLeft()
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case nKey == K_CTRL_RIGHT
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oBrw:panRight()
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case nKey == K_CTRL_HOME
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oBrw:panHome()
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case nKey == K_CTRL_END
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oBrw:panEnd()
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endcase
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end
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RestScreen( nTop, nLeft, nBottom, nRight, cOldScreen )
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SetCursor( nOldCursor )
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return .t.
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static procedure Statline( oBrw )
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local nTop := oBrw:nTop - 1
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local nRight := oBrw:nRight
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@ nTop, nRight - 27 SAY "Record "
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if LastRec() == 0
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@ nTop, nRight - 20 SAY "<none> "
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elseif RecNo() == LastRec() + 1
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@ nTop, nRight - 40 SAY " "
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@ nTop, nRight - 20 SAY " <new>"
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else
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@ nTop, nRight - 40 SAY iif( Deleted(), "<Deleted>", " " )
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@ nTop, nRight - 20 SAY PadR( LTrim( Str( RecNo() ) ) + "/" +;
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Ltrim( Str( LastRec() ) ), 16 ) +;
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iif( oBrw:hitTop, "<bof>", " " )
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endif
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return
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