500 lines
13 KiB
Plaintext
500 lines
13 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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* ScrollBar class
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*
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* Copyright 2000 Luiz Rafael Culik <culik@sl.conex.net>
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* www - http://www.harbour-project.org
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*
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* Copyright 2005 Alejandro de Garate <alex_degarate@hotmail.com>
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* METHOD SetStyle( cStyle )
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* METHOD SetColor( cColor )
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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 "hbclass.ch"
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#include "color.ch"
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#include "common.ch"
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#include "button.ch"
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#ifdef HB_COMPAT_C53
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// new definitions for better coding. Are screen Codepage dependent, but
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// can be changed with the setStyle method.
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#define SB_UPARROW CHR(24)
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#define SB_TRACK CHR(178)
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#define SB_THUMB CHR(254)
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#define SB_DNARROW CHR(25)
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#define SB_LEFTARROW CHR(27)
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#define SB_RIGHTARROW CHR(26)
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#define SB_VERT_SCROLL 1
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#define SB_HORZ_SCROLL 2
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// converted to macro to speed up things...
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#define __GuiColor( cPair, nPos) (hb_colorindex( cPair, nPos - 1))
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CLASS HBScrollBar
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DATA BarLength INIT 1 // 1er error (no tenia INIT 1)
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DATA Cargo
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DATA sBlock
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DATA Style
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DATA ClassName INIT "HBSCROLLBAR"
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DATA ColorSpec
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DATA aStyle // Note: new instance var for old Harbour versions to
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// speed up displaying, <Style> instance var is conserved
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// for compatibility purpose. [Alejandro de Garate]
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METHOD Display()
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METHOD HitTest()
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METHOD Update()
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METHOD New( nStart, nEnd, nOffSet, bsBlock, nOrient )
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ACCESS Current inline ::GetCurrent()
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ASSIGN Current( nCurrent ) inline ::GetCurrent( nCurrent )
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ACCESS End inline ::GetEnd()
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ASSIGN End ( nEnd ) inline ::GetEnd( nEnd )
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ACCESS OffSet inline ::GetOffSet()
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ASSIGN OffSet( nOffSet ) inline ::GetOffSet( nOffSet )
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ACCESS Orient inline ::GetOrient()
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ASSIGN Orient( nOrient ) inline ::GetOrient( nOrient )
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ACCESS Start inline ::GetStart()
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ASSIGN Start( nStart ) inline ::GetStart( nStart )
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ACCESS ThumbPos inline ::GetThumbPos()
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ASSIGN ThumbPos( nPos ) inline ::GetThumbPos( nPos )
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ACCESS TOTAL inline ::GetTotal()
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ASSIGN TOTAL( nTotal ) inline ::GetTotal( nTotal )
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DATA nCurrent INIT 0
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DATA nEnd INIT 0
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DATA nOffSet INIT 0
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DATA nOrient INIT 0
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DATA nStart INIT 0
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DATA nThumbPos INIT 1
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DATA nTotal INIT 100
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DATA hb_p_lShow INIT .F.
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METHOD GetCurrent( nCurrent )
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METHOD GetEnd( nEnd )
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METHOD GetStart( nStart )
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METHOD GetThumbPos( nPos )
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METHOD GetTotal( nTotal )
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METHOD GetOffSet( nOffSet )
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METHOD GetOrient( nOrient )
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METHOD SetStyle( cStyle )
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METHOD SetColor( cColor )
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ENDCLASS
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// NEW METHOD !
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METHOD SetStyle( cStyle ) CLASS HBScrollBar
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IF LEN( cStyle ) == 4
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::aStyle[ 1] := SUBST( cStyle, 1, 1)
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::aStyle[ 2] := SUBST( cStyle, 2, 1)
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::aStyle[ 3] := SUBST( cStyle, 3, 1)
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::aStyle[ 4] := SUBST( cStyle, 4, 1)
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::Style := cStyle
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ENDIF
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RETURN Self
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// NEW METHOD !
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METHOD SetColor( cColor ) CLASS HBScrollBar
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::ColorSpec := cColor
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RETURN Self
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METHOD New( nStart, nEnd, nOffSet, bsBlock, nOrient ) CLASS HBScrollBar
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LOCAL cStyle, aStyle, cColor := Setcolor()
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IF nOrient == SB_VERT_SCROLL
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cStyle := "â–‘"
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aStyle := { SB_UPARROW, SB_TRACK, SB_THUMB, SB_DNARROW }
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ELSEIF nOrient == SB_HORZ_SCROLL
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cStyle := "â–" + Chr(26)
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aStyle := { SB_LEFTARROW, SB_TRACK, SB_THUMB, SB_RIGHTARROW }
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ENDIF
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::Style := aStyle[ 1] + aStyle[ 2] + aStyle[ 3] + aStyle[ 4]
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::aStyle := aStyle
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::BarLength := nEnd - nStart - 1
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::Current := 1
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::Cargo := NIL
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::ColorSpec := __guicolor( cColor, CLR_UNSELECTED + 1 ) + "," + ;
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__guicolor( cColor, CLR_ENHANCED + 1 )
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::End := nEnd
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::OffSet := nOffSet
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::Orient := nOrient
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::sBlock := bsBlock
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::Start := nStart
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::Thumbpos := 1
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::Total := 1
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RETURN Self
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METHOD Display() CLASS HBScrollBar
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LOCAL cCurColor := Setcolor()
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LOCAL nCurRow := Row()
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LOCAL nCurCol := Col()
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LOCAL cOffSet, cColor2, cColor1
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LOCAL nStart
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LOCAL nEnd
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LOCAL nPos
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LOCAL lDisplay := .F.
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IF ThumbPos( Self )
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lDisplay := .T.
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cOffSet := ::OffSet
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DispBegin()
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cColor1 := __guicolor( ::ColorSpec, 1 )
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cColor2 := __guicolor( ::ColorSpec, 2 )
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IF ::Orient == SB_VERT_SCROLL
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nStart := ::Start
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nEnd := ::End - 1
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SET COLOR TO (cColor1)
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FOR nPos := nStart + 1 TO nEnd
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DispOutAt( nPos, cOffSet, ::aStyle[ 2 ] )
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NEXT
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SET COLOR TO (cColor2)
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DispOutAt( nStart, cOffSet, ::aStyle[ 1 ] )
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DispOutAt( nStart + ::ThumbPos, cOffSet, ::aStyle[ 3 ] )
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DispOutAt( nEnd + 1, cOffSet, ::aStyle[ 4 ] )
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ELSE
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nStart := ::Start
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nEnd := ::End - 1
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DispOutAt( cOffSet, nStart +1, Replic(::aStyle[ 2], nEnd - nStart ), cColor1)
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SET COLOR TO (cColor2)
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DispOutAt( cOffSet, nStart, ::aStyle[ 1 ] )
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DispOutAt( cOffSet, nStart + ::ThumbPos, ::aStyle[ 3 ] )
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DispOutAt( cOffSet, nEnd + 1, ::aStyle[ 4 ] )
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ENDIF
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DispEnd()
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SET COLOR TO (cCurColor)
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Setpos( nCurRow, nCurCol )
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ENDIF
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RETURN lDisplay
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METHOD HitTest( nRow, nCol ) CLASS HBScrollBar
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IF ::Orient == SB_VERT_SCROLL
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DO CASE
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CASE nCol != ::OffSet
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CASE nRow < ::Start
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CASE nRow > ::End
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CASE nRow == ::Start
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RETURN HTSCROLLUNITDEC
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CASE nRow == ::End
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RETURN HTSCROLLUNITINC
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CASE nRow < ::ThumbPos + ::Start
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RETURN HTSCROLLBLOCKDEC
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CASE nRow > ::ThumbPos + ::Start
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RETURN HTSCROLLBLOCKINC
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CASE nRow == ::ThumbPos + ::Start
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RETURN HTSCROLLTHUMBDRAG
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ENDCASE
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IF nCol == ::OffSet + 1 .OR. nCol == ::OffSet
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DO CASE
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CASE nCol != ::OffSet .AND. nCol != ::OffSet + 1
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CASE nRow < ::Start
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CASE nRow > ::End
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CASE nRow == ::Start
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RETURN HTSCROLLUNITDEC
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CASE nRow == ::End
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RETURN HTSCROLLUNITINC
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CASE nRow < ::ThumbPos + ::Start
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RETURN HTSCROLLBLOCKDEC
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CASE nRow > ::ThumbPos + ::Start
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RETURN HTSCROLLBLOCKINC
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CASE nRow == ::ThumbPos + ::Start
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RETURN HTSCROLLTHUMBDRAG
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ENDCASE
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ENDIF
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ELSEIF ::Orient == SB_HORZ_SCROLL
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DO CASE
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CASE nRow != ::OffSet
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CASE nCol < ::Start
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CASE nCol > ::End
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CASE nCol == ::Start
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RETURN HTSCROLLUNITDEC
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CASE nCol == ::End
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RETURN HTSCROLLUNITINC
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CASE nCol < ::ThumbPos + ::Start
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RETURN HTSCROLLBLOCKDEC
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CASE nCol > ::ThumbPos + ::Start
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RETURN HTSCROLLBLOCKINC
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CASE nCol == ::ThumbPos + ::Start
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RETURN HTSCROLLTHUMBDRAG
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ENDCASE
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ENDIF
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RETURN HTNOWHERE
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METHOD Update() CLASS HBScrollBar
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LOCAL nCurRow, nCurCol
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LOCAL lUpdated := .F.
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LOCAL nThumbPos := ::ThumbPos
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IF !ThumbPos( Self )
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ELSEIF nThumbPos != ::ThumbPos
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lUpdated := .T.
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nCurRow := Row()
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nCurCol := Col()
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DispBegin()
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IF ::Orient == SB_VERT_SCROLL
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DispOutAt( ::Start + nThumbPos, ::OffSet, ::aStyle[ 2 ], __guicolor( ::ColorSpec, 1 ) )
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DispOutAt( ::Start + ::ThumbPos, ::OffSet, ::aStyle[ 3 ], __guicolor( ::ColorSpec, 2 ) )
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ELSE
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DispOutAt( ::OffSet, ::Start + nThumbPos, ::aStyle[ 2 ], __guicolor( ::ColorSpec, 1 ) )
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DispOutAt( ::OffSet, ::Start + ::ThumbPos, ::aStyle[ 3 ], __guicolor( ::ColorSpec, 2 ) )
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ENDIF
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DispEnd()
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SetPos( nCurRow, nCurCol )
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ENDIF
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RETURN lUpdated
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METHOD GetCurrent( nCurrent ) CLASS HBScrollBar
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IF ! IsNumber( nCurrent )
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ELSEIF nCurrent > ::nTotal
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ELSEIF nCurrent != ::nCurrent
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::nCurrent := nCurrent
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ENDIF
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RETURN ::nCurrent
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METHOD GetEnd( nEnd ) CLASS HBScrollBar
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IF !Isnumber( nEnd )
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ELSEIF nEnd < ::nStart
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ELSEIF nEnd != ::nEnd
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::nEnd := nEnd
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::BarLength := nEnd - ::nStart - 1
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ENDIF
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RETURN ::nEnd
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METHOD GetOffSet( nOffSet ) CLASS HBScrollBar
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IF ! IsNumber( nOffSet )
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ELSEIF nOffSet != ::nOffSet
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::nOffSet := nOffSet
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ENDIF
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RETURN ::nOffSet
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METHOD GetOrient( nOrient ) CLASS HBScrollBar
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IF ! IsNumber( nOrient )
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ELSEIF nOrient == SB_VERT_SCROLL .OR. nOrient == SB_HORZ_SCROLL
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::nOrient := nOrient
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ENDIF
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RETURN ::nOrient
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METHOD GetStart( nStart ) CLASS HBScrollBar
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IF ! IsNumber( nStart )
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ELSEIF nStart > ::End
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ELSEIF nStart != ::nStart
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::nStart := nStart
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::BarLength := ::nEnd - nStart - 1
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ENDIF
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RETURN ::nStart
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METHOD GetThumbPos( nPos ) CLASS HBScrollBar
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IF IsNumber( nPos )
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IF nPos < 1
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::nThumbPos := 1
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ELSEIF nPos >= ::BarLength
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::nThumbPos := ::BarLength
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ELSEIF nPos >= ::BarLength - 1
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::nThumbPos := nPos
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ELSE
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::nThumbPos := nPos
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ENDIF
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IF nPos == 0
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::hb_p_lShow := .F.
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ELSE
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::hb_p_lShow := .T.
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ENDIF
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ENDIF
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RETURN ::nThumbPos
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METHOD GetTotal( nTotal ) CLASS HBScrollBar
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IF ! IsNumber( nTotal )
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ELSEIF nTotal < 2
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ELSEIF nTotal != ::nTotal
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::nTotal := nTotal
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ENDIF
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RETURN ::nTotal
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STATIC FUNCTION ThumbPos( oScroll )
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LOCAL nSize
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LOCAL nCurrent
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LOCAL nBarLength
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LOCAL nTotal
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IF oScroll:barLength < 2
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RETURN .F.
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ENDIF
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IF oScroll:total < 2
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RETURN .F.
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ENDIF
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/*
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IF oScroll:hb_p_lShow
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RETURN .T.
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ENDIF
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*/
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nCurrent := oScroll:Current
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nBarLength := oScroll:BarLength
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nTotal := oScroll:Total
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// percent relative to total
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nSize := (100 * nCurrent / nTotal)
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// percent relative to nBarLength
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nSize := (nBarLength * nSize / 100)
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// remove decimal point
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nSize := IIF( nSize < (nBarLength / 2), ROUND( nSize, 0), INT( nSize) )
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IF nSize <= 1
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if (nCurrent > 1)
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nSize := 2
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else
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nSize := 1
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endif
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ENDIF
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IF nSize >= nBarLength
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if (nCurrent < nTotal)
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nSize := nBarLength - 1
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else
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nSize := nBarLength
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endif
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ENDIF
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if (nCurrent == 1)
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nSize := 1
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elseif (nCurrent == nTotal)
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nSize := nBarLength
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endif
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oScroll:ThumbPos := nSize
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RETURN .T.
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FUNCTION SCROLLBAR( nStart, nEnd, nOffSet, bsBlock, nOrient )
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IF !( IsNumber( nStart ) ) .OR. !( Isnumber( nEnd ) ) .OR.;
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!( IsNumber( nOffSet )) .OR. !( IsNumber( nOrient ))
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RETURN NIL
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ENDIF
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IF nOrient == NIL
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nOrient := SB_VERT_SCROLL
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ENDIF
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RETURN( HBScrollBar():New( nStart, nEnd, nOffSet, bsBlock, nOrient ) )
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#endif
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