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/***************************************************************************
kcolumnsview.cpp - description
-------------------
begin : Mit Mai 21 2003
copyright : (C) 2003 by Friedrich W. H. Kossebau
email : Friedrich.W.H@Kossebau.de
***************************************************************************/
/***************************************************************************
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Library General Public *
* License version 2 as published by the Free Software Foundation. *
* *
***************************************************************************/
//#include <kdebug.h>
// qt specific
#include <tqpainter.h>
// lib specific
#include "kcolumn.h"
#include "kcolumnsview.h"
using namespace KHE;
static bool DefaultHorizontalGrid = false;
KColumnsView::KColumnsView( /*bool R,*/ TQWidget *Parent, const char *Name, WFlags Flags )
: TQScrollView( Parent, Name, Flags | WRepaintNoErase /*| WStaticContents*/ ),
NoOfLines( 0 ),
LineHeight( 0 ),
TotalWidth( 0 ),
HorizontalGrid( DefaultHorizontalGrid ),
// Reversed( R ),
d( 0 )
{
viewport()->setBackgroundMode( PaletteBase );
setBackgroundMode( PaletteBackground, PaletteBase );
viewport()->setFocusProxy( this );
Columns.setAutoDelete( true );
}
KColumnsView::~KColumnsView()
{
}
void KColumnsView::setNoOfLines( int NewNoOfLines )
{
NoOfLines = NewNoOfLines;
}
void KColumnsView::setLineHeight( KPixelY LH )
{
LineHeight = LH;
for( KColumn *C=Columns.first(); C; C=Columns.next() )
C->setLineHeight( LineHeight );
verticalScrollBar()->setLineStep( LineHeight );
updateLineBufferSize();
}
void KColumnsView::updateWidths()
{
TotalWidth = 0;
for( KColumn *C=Columns.first(); C; C=Columns.next() )
{
C->setX( TotalWidth );
TotalWidth += C->visibleWidth();
}
updateLineBufferSize();
}
void KColumnsView::updateLineBufferSize()
{
int w = totalWidth();
int h = LineHeight;
if( w != LineBuffer.width() || h != LineBuffer.height() )
LineBuffer.resize( w, h );
}
int KColumnsView::noOfLinesPerPage() const
{
if( !viewport() || LineHeight == 0 )
return 1;
// int NoOfLinesPerPage = (visibleHeight()-1) / LineHeight; // -1 ensures to get always the last visible line
int NoOfLinesPerPage = (viewport()->height()-1) / LineHeight; // -1 ensures to get always the last visible line
if( NoOfLinesPerPage == 0 )
// ensure to move down at least one line
NoOfLinesPerPage = 1;
return NoOfLinesPerPage;
}
void KColumnsView::addColumn( KColumn *C )
{
// if( Reversed )
// Columns.prepend( C );
// else
Columns.append( C );
updateWidths();
}
void KColumnsView::removeColumn( KColumn *C )
{
Columns.remove( C );
updateWidths();
}
void KColumnsView::updateView()
{
resizeContents( totalWidth(), totalHeight() );
updateContents();
}
void KColumnsView::repaintView()
{
resizeContents( totalWidth(), totalHeight() );
repaintContents( false );
}
void KColumnsView::paintEmptyArea( TQPainter *P, int cx ,int cy, int cw, int ch)
{
P->fillRect( cx, cy, cw, ch, backgroundBrush() );
}
void KColumnsView::drawContents( TQPainter *P, int cx, int cy, int cw, int ch )
{
//kdDebug(1501) << "drawContents(" << cx<<","<<cw<<"#"<<cy<<","<<ch<<")\n";
KPixelXs AffectedXs( cx, cw, true );
// content to be shown?
if( AffectedXs.startsBefore(TotalWidth) )
{
KPixelYs AffectedYs( cy, ch, true );
// collect affected columns
TQPtrList<KColumn> RedrawColumns;
for( KColumn *C=Columns.first(); C; C=Columns.next() )
if( C->isVisible() && C->overlaps(AffectedXs) )
RedrawColumns.append( C );
// any lines to be drawn?
if( NoOfLines > 0 )
{
// calculate affected lines
KSection AffectedLines = visibleLines( AffectedYs );
AffectedLines.restrictEndTo( NoOfLines - 1 );
if( AffectedLines.isValid() )
{
TQPainter Paint;
Paint.tqbegin( const_cast<TQPixmap*>(&LineBuffer), this );
// starting painting with the first line
KColumn *C = RedrawColumns.first();
Paint.translate( C->x(), 0 );
for( ; C; C=RedrawColumns.next() )
{
C->paintFirstLine( &Paint, AffectedXs, AffectedLines.start() );
Paint.translate( C->width(), 0 );
}
// Go through the other lines
KPixelY y = AffectedLines.start() * LineHeight;
int l = AffectedLines.start();
while( true )
{
Paint.end();
P->drawPixmap( cx, y, LineBuffer, cx, 0, cw, LineHeight ); // bitBlt directly impossible: lack of real coord
// copy to screen
// bitBlt( viewport(), cx - contentsX(), y - contentsY(),
// &LineBuffer, cx, 0, cw, LineHeight );
++l;
y += LineHeight;
if( l > AffectedLines.end() )
break;
// to avoid flickers we first paint to the linebuffer
Paint.tqbegin( TQT_TQPAINTDEVICE(&LineBuffer), this );
KColumn *C = RedrawColumns.first();
Paint.translate( C->x(), 0 );
for( ; C; C=RedrawColumns.next() )
{
C->paintNextLine( &Paint );
Paint.translate( C->width(), 0 );
}
if( HorizontalGrid && cx < TotalWidth )
Paint.drawLine( cx, LineHeight-1, TotalWidth-1, LineHeight-1 ); // TODO: use a additional TotalHeight?
}
}
}
// draw empty columns?
AffectedYs.setStart( totalHeight() );
if( AffectedYs.isValid() )
{
for( KColumn *C = RedrawColumns.first(); C; C=RedrawColumns.next() )
C->paintEmptyColumn( P, AffectedXs, AffectedYs );
}
}
// Paint empty rects
AffectedXs.setStart( TotalWidth );
if( AffectedXs.isValid() )
paintEmptyArea( P, AffectedXs.start(), cy, AffectedXs.width(), ch );
}
// Implemented to get rid of a compiler warning
void KColumnsView::drawContents( TQPainter * ) {}
#include "kcolumnsview.moc"
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