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484 lines
18 KiB
484 lines
18 KiB
/* -*- Mode: C++ -*-
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KDChart - a multi-platform charting engine
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*/
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/****************************************************************************
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** Copyright (C) 2001-2003 Klarälvdalens Datakonsult AB. All rights reserved.
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**
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** This file is part of the KDChart library.
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**
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** This file may be distributed and/or modified under the terms of the
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** GNU General Public License version 2 as published by the Free Software
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** Foundation and appearing in the file LICENSE.GPL included in the
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** packaging of this file.
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**
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** Licensees holding valid commercial KDChart licenses may use this file in
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** accordance with the KDChart Commercial License Agreement provided with
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** the Software.
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**
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** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
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** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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**
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** See http://www.klaralvdalens-datakonsult.se/?page=products for
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** information about KDChart Commercial License Agreements.
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**
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** Contact info@klaralvdalens-datakonsult.se if any conditions of this
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** licensing are not clear to you.
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**
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**********************************************************************/
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#include <tqpainter.h>
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#include <tqbitmap.h>
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#include <tqpixmap.h>
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#include <math.h>
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#include <limits.h>
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#include <KDDrawText.h>
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#ifndef M_PI
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#define M_PI 3.14159265358979323846
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#endif
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void KDDrawText::drawRotatedText( TQPainter* painter,
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float degrees,
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TQPoint anchor,
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const TQString& text,
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const TQFont* font,
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int align,
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bool showAnchor,
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const TQFontMetrics* fontMet,
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bool noFirstrotate,
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bool noBackrotate,
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KDDrawTextRegionAndTrueRect* infos,
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bool optimizeOutputForScreen )
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{
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drawRotatedTxt( painter,
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optimizeOutputForScreen,
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degrees,
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anchor,
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text,
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font,
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align,
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showAnchor,
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INT_MAX,
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INT_MAX,
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fontMet,
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false,
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0 != infos,
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noFirstrotate,
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noBackrotate,
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infos );
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}
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KDDrawTextRegionAndTrueRect KDDrawText::measureRotatedText(
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TQPainter* painter,
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float degrees,
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TQPoint anchor,
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const TQString& text,
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const TQFont* font,
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int align,
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const TQFontMetrics* fontMet,
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bool noFirstrotate,
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bool noBackrotate,
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int addPercentOfHeightToRegion )
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{
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KDDrawTextRegionAndTrueRect infos;
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drawRotatedTxt( painter,
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false,
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degrees,
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anchor,
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text,
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font,
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align,
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false,
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INT_MAX,
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INT_MAX,
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fontMet,
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true,
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false,
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noFirstrotate,
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noBackrotate,
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&infos,
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addPercentOfHeightToRegion );
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return infos;
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}
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void KDDrawText::drawRotatedTxt( TQPainter* painter,
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bool optimizeOutputForScreen,
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float degrees,
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TQPoint anchor,
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const TQString& text,
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const TQFont* font,
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int align,
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bool showAnchor,
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int txtWidth,
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int txtHeight,
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const TQFontMetrics* fontMet,
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bool calculateOnly,
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bool doNotCalculate,
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bool noFirstrotate,
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bool noBackrotate,
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KDDrawTextRegionAndTrueRect* infos,
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int addPercentOfHeightToRegion )
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{
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// showAnchor=true;
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//tqDebug("\nanchor: "+ text + " / "+TQString::number(anchor.x())
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// +" / "+TQString::number(anchor.y()));
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bool useInfos = doNotCalculate && infos;
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bool fontChanged = ( 0 != font );
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TQFont oldFont;
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if( fontChanged ) {
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oldFont = painter->font();
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painter->setFont( *font );
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}
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else
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font = static_cast<const TQFont*>(&painter->font());
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bool mustBackrotate = false;
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if( !optimizeOutputForScreen && !noFirstrotate ){
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painter->rotate( degrees );
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if( !noBackrotate )
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mustBackrotate = true;
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}
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TQPoint pos = useInfos ? infos->pos : painter->xFormDev( anchor );
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if( useInfos )
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{
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txtWidth = infos->width;
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txtHeight = infos->height;
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}
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else
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{
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int newHeight=0;
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// a bug in the AIX 5.2 compiler means using (?:) syntax doesn't work here
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// therefor we do it the following way:
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TQFontMetrics* pFM=0;
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if( ! pFM ) {
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pFM = new TQFontMetrics( painter->fontMetrics() );
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} else {
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pFM = const_cast<TQFontMetrics*>(fontMet);
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}
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int nLF = text.contains('\n');
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if( INT_MAX == txtWidth ) {
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if( nLF ){
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int tw;
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txtWidth = 0;
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int i0 = 0;
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int iLF = text.find('\n');
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while( -1 != iLF ){
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const TQRect r(pFM->boundingRect( text.mid(i0, iLF-i0) ));
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tw = r.width()+ 2;
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newHeight = r.height();
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if( tw > txtWidth )
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txtWidth = tw;
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i0 = iLF+1;
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iLF = text.find('\n', i0);
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}
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if( iLF < (int)text.length() ){
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const TQRect r(pFM->boundingRect( text.mid( i0 ) ));
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tw = r.width()+2;
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newHeight = r.height();
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if( tw > txtWidth )
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txtWidth = tw;
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i0 = iLF+1;
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}
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}else{
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const TQRect r(painter->boundingRect( 0,0,1,1, TQt::AlignAuto, text ));
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// correct width and height before painting with 2 unit to avoid truncating.
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// PENDING Michel - improve
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txtWidth = r.width()+2;
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newHeight = r.height()+2;
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}
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}
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if( INT_MAX == txtWidth || INT_MAX == txtHeight ) {
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txtHeight = newHeight ? newHeight : pFM->height() * (1+nLF);
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}
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if( pFM != fontMet )
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delete pFM;
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if( infos ) {
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infos->pos = pos;
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// PENDING infos
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infos->width = txtWidth;
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infos->height = txtHeight;
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}
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}
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if( showAnchor ) {
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int d = txtHeight/4;
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TQPen savePen = painter->pen();
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painter->setPen( TQColor( TQt::darkRed ) );
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painter->drawLine( pos.x(), pos.y()-d,
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pos.x(), pos.y()+d );
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painter->drawLine( pos.x()-d, pos.y(),
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pos.x()+d, pos.y() );
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painter->setPen( savePen );
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}
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int x = useInfos ? infos->x : pos.x();
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int y = useInfos ? infos->y : pos.y();
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//tqDebug("1.: (x / y) :" + text + " / "+TQString::number(x)
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// +" / "+TQString::number(y));
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//tqDebug("2.: (posx / posy) :" + text );
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// tqDebug ( "%d", pos.x() ); tqDebug ( "%d", pos.y() );
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//tqDebug("3.: (infosx / infosy) :" + text + " / "+TQString::number(infos->x)
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// +" / "+TQString::number(infos->y));
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if( !useInfos && !optimizeOutputForScreen ) {
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switch( align & ( TQt::AlignLeft | TQt::AlignRight | TQt::AlignHCenter ) ) {
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case TQt::AlignLeft:
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break;
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case TQt::AlignRight:
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//tqDebug( TQPaintDeviceMetrics::logicalDpiX() );
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x -= txtWidth;
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break;
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case TQt::AlignHCenter:
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x -= txtWidth - txtWidth/2;
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break;
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}
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switch( align & ( TQt::AlignTop | TQt::AlignBottom | TQt::AlignVCenter ) ) {
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case TQt::AlignTop:
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break;
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case TQt::AlignBottom:
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y -= txtHeight;
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break;
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case TQt::AlignVCenter:
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y -= txtHeight/2;
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break;
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}
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}
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if( infos && !useInfos ) {
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painter->xForm( pos );
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infos->x = x - 4;
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infos->y = y - 4;
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//PENDING Michel updating info using x , y from pos
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//tqDebug("4.: (infosx / infosy) :" + text + " / "+TQString::number(infos->x)
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//+" / "+TQString::number(infos->y));
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//tqDebug("5.: (x / y) :" + text + " / "+TQString::number(x)
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// +" / "+TQString::number(y));
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//tqDebug("6.: (anchorx /anchory) :" + text + " / "+TQString::number(x)
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// +" / "+TQString::number(y));
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TQRect rect( painter->boundingRect( x, y,
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txtWidth, txtHeight,
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TQt::AlignLeft + TQt::AlignTop,
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text ) );
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//painter->fillRect (rect, TQt::blue );
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TQPoint topLeft( painter->xForm( rect.topLeft() ) );
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TQPoint topRight( painter->xForm( rect.topRight() ) );
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TQPoint bottomRight( painter->xForm( rect.bottomRight() ) );
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TQPoint bottomLeft( painter->xForm( rect.bottomLeft() ) );
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int additor = addPercentOfHeightToRegion * txtHeight / 100;
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TQPointArray points;
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points.setPoints( 4, topLeft.x()-additor, topLeft.y()-additor,
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topRight.x()+additor, topRight.y()-additor,
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bottomRight.x()+additor, bottomRight.y()+additor,
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bottomLeft.x()-additor, bottomLeft.y()+additor );
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infos->region = TQRegion( points );
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}
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// When the TQt initialization bug is fixed the following scope
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// will be put into an "if( showAnchor )" entirely.
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{
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int d = txtHeight/4;
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TQPen savePen = painter->pen();
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if( showAnchor ) {
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painter->setPen( TQColor( TQt::blue ) );
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painter->drawLine( x, y-d,
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x, y+d );
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painter->drawLine( x-d, y,
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x+d, y );
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painter->setPen( TQColor( TQt::darkGreen ) );
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painter->drawRect(x,y,txtWidth,txtHeight);
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//painter->drawText( x, y-d, text);
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/*
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}else{
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// Working around a strange TQt bug: Rotated painter must be
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// initialized by drawing before text can be painted there.
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painter->setPen( TQColor( TQt::white ) );
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painter->drawLine( 30000,0,30001,0 );
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*/
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}
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painter->setPen( savePen );
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}
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if( mustBackrotate && optimizeOutputForScreen ){
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painter->rotate( -degrees );
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mustBackrotate = false;
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}
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if( !calculateOnly ){
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//tqDebug("txtWidth: %i txtHeight: %i", txtWidth, txtHeight);
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if( !optimizeOutputForScreen ){
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/*
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painter->drawText( x, y,
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txtWidth, txtHeight,
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TQt::AlignLeft + TQt::AlignTop,
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text );
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*/
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painter->drawText( x, y,
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txtWidth, txtHeight,
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TQt::AlignLeft + TQt::AlignTop,
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text );
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/*
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painter->drawText( x, y,
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text,
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-1,
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TQt::AlignRight + TQt::AlignTop );
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*/
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}else{
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// new code (rotating the text ourselves for better quality on screens)
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TQPixmap pm( txtWidth+2, txtHeight+2, 1 );
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// note: When using colored axis labels it will be necessary
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// to change this code and use a 256 color pixmap instead
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// of a monochrome one. (khz, 2002/08/15)
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pm.fill(TQt::color0);
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TQPainter p;
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p.begin( &pm );
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if( showAnchor ){
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p.drawRect(0,0, txtWidth,txtHeight);
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p.drawLine(0,0, txtWidth,txtHeight);
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p.drawLine(0,txtHeight, txtWidth,0);
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}
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p.setFont(painter->font());
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p.drawText( 0, 0, txtWidth, txtHeight,
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TQt::AlignLeft + TQt::AlignTop,
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text );
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/*
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p.drawText( 0,0,
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text,
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-1,
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TQt::AlignLeft + TQt::AlignTop );
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*/
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TQBitmap mask;
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mask = pm;
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pm.setMask( mask );
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TQWMatrix m;
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m.rotate( degrees );
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TQPixmap theRotatedPixmap = pm.xForm(m);
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// where are our four corner points now:
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double degreesRad = degrees;
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while( degreesRad > 360 )
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degreesRad -= 360;
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degreesRad *= M_PI / 180.0;
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double cosA = cos( degreesRad );
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double sinA = sin( degreesRad );
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TQPoint pTopLeft( 0,
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0 );
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TQPoint pBotLeft( static_cast < int > ( 0 * cosA - txtHeight * sinA ),
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static_cast < int > ( txtHeight * cosA + 0 * sinA ) );
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TQPoint pTopRight( static_cast < int > ( txtWidth * cosA - 0 * sinA ),
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static_cast < int > ( 0 * cosA + txtWidth * sinA ) );
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TQPoint pBotRight( static_cast < int > ( txtWidth * cosA - txtHeight * sinA ),
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static_cast < int > ( txtHeight * cosA + txtWidth * sinA ) );
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// make our four corner points relative
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// to the bounding rect of the rotated pixmap
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{
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TQPoint pDeltaTL( TQMIN(0, TQMIN(pBotLeft.x(), TQMIN(pTopRight.x(), pBotRight.x()))),
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TQMIN(0, TQMIN(pBotLeft.y(), TQMIN(pTopRight.y(), pBotRight.y()))) );
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pTopLeft -= pDeltaTL;
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pBotLeft -= pDeltaTL;
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pTopRight -= pDeltaTL;
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pBotRight -= pDeltaTL;
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}
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/*
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painter->setPen( TQColor( TQt::black ) );
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painter->drawLine( x-13, y, x+13, y );
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painter->drawLine( x, y-13, x, y+13 );
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painter->setPen( TQColor( TQt::blue ) );
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painter->drawLine( x+pTopLeft.x()-3, y+pTopLeft.y(), x+pTopLeft.x()+3, y+pTopLeft.y() );
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painter->drawLine( x+pTopLeft.x(), y+pTopLeft.y()-3, x+pTopLeft.x(), y+pTopLeft.y()+3 );
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painter->setPen( TQColor( TQt::red ) );
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painter->drawLine( x+pTopRight.x()-3, y+pTopRight.y(), x+pTopRight.x()+3, y+pTopRight.y() );
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painter->drawLine( x+pTopRight.x(), y+pTopRight.y()-3, x+pTopRight.x(), y+pTopRight.y()+3 );
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painter->setPen( TQColor( TQt::green ) );
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painter->drawLine( x+pBotLeft.x()-3, y+pBotLeft.y(), x+pBotLeft.x()+3, y+pBotLeft.y() );
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painter->drawLine( x+pBotLeft.x(), y+pBotLeft.y()-3, x+pBotLeft.x(), y+pBotLeft.y()+3 );
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painter->setPen( TQColor( TQt::yellow ) );
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painter->drawLine( x+pBotRight.x()-3, y+pBotRight.y(), x+pBotRight.x()+3, y+pBotRight.y() );
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painter->drawLine( x+pBotRight.x(), y+pBotRight.y()-3, x+pBotRight.x(), y+pBotRight.y()+3 );
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*/
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// The horizontal and vertical alignment together define one of
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// NINE possible points: this point must be moved on the anchor.
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int hAlign = align & ( TQt::AlignLeft | TQt::AlignRight | TQt::AlignHCenter );
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int vAlign = align & ( TQt::AlignTop | TQt::AlignBottom | TQt::AlignVCenter );
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TQPoint pixPoint;
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switch( hAlign ) {
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case TQt::AlignLeft:
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switch( vAlign ) {
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case TQt::AlignTop:
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pixPoint = pTopLeft;
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break;
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case TQt::AlignBottom:
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pixPoint = pBotLeft;
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break;
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case TQt::AlignVCenter:
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default:
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pixPoint = TQPoint( (pTopLeft.x() + pBotLeft.x()) / 2,
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(pTopLeft.y() + pBotLeft.y()) / 2 );
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break;
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}
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break;
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case TQt::AlignRight:
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switch( vAlign ) {
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case TQt::AlignTop:
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pixPoint = pTopRight;
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break;
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case TQt::AlignBottom:
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pixPoint = pBotRight;
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break;
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case TQt::AlignVCenter:
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default:
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pixPoint = TQPoint( (pTopRight.x() + pBotRight.x()) / 2,
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(pTopRight.y() + pBotRight.y()) / 2 );
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break;
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}
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break;
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case TQt::AlignHCenter:
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default:
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switch( vAlign ) {
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case TQt::AlignTop:
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pixPoint = TQPoint( (pTopLeft.x() + pTopRight.x()) / 2,
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(pTopLeft.y() + pTopRight.y()) / 2 );
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break;
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case TQt::AlignBottom:
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pixPoint = TQPoint( (pBotLeft.x() + pBotRight.x()) / 2,
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(pBotLeft.y() + pBotRight.y()) / 2 );
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break;
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case TQt::AlignVCenter:
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default:
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pixPoint = TQPoint( (pTopLeft.x() + pBotRight.x()) / 2,
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(pTopLeft.y() + pBotRight.y()) / 2 );
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break;
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}
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break;
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}
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//tqDebug("2.: (x / y) : "+TQString::number(x)
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// +" / "+TQString::number(y));
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painter->drawPixmap( TQPoint( x - pixPoint.x(),
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y - pixPoint.y() ),
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theRotatedPixmap );
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p.end();
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}
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}
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if( mustBackrotate )
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painter->rotate( -degrees );
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if( fontChanged )
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painter->setFont( oldFont );
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}
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