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Diffstat (limited to 'khexedit/lib/kcolumnsview.cpp')
| -rw-r--r-- | khexedit/lib/kcolumnsview.cpp | 236 |
1 files changed, 236 insertions, 0 deletions
diff --git a/khexedit/lib/kcolumnsview.cpp b/khexedit/lib/kcolumnsview.cpp new file mode 100644 index 0000000..1c93af8 --- /dev/null +++ b/khexedit/lib/kcolumnsview.cpp @@ -0,0 +1,236 @@ +/*************************************************************************** + 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 <qpainter.h> +// lib specific +#include "kcolumn.h" +#include "kcolumnsview.h" + + +using namespace KHE; + +static bool DefaultHorizontalGrid = false; + +KColumnsView::KColumnsView( /*bool R,*/ QWidget *Parent, const char *Name, WFlags Flags ) + : QScrollView( 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( QPainter *P, int cx ,int cy, int cw, int ch) +{ + P->fillRect( cx, cy, cw, ch, backgroundBrush() ); +} + + +void KColumnsView::drawContents( QPainter *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 + QPtrList<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() ) + { + QPainter Paint; + Paint.begin( &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.begin( &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( QPainter * ) {} + +#include "kcolumnsview.moc" |