彻底改版2.0
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feiyangqingyun
293
third/3rd_qwt/qwt_column_symbol.cpp
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293
third/3rd_qwt/qwt_column_symbol.cpp
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/* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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* Qwt Widget Library
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* Copyright (C) 1997 Josef Wilgen
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* Copyright (C) 2002 Uwe Rathmann
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the Qwt License, Version 1.0
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*****************************************************************************/
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#include "qwt_column_symbol.h"
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#include "qwt_math.h"
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#include "qwt_painter.h"
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#include <qpainter.h>
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#include <qpalette.h>
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static void qwtDrawBox( QPainter *p, const QRectF &rect,
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const QPalette &pal, double lw )
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{
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if ( lw > 0.0 )
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{
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if ( rect.width() == 0.0 )
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{
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p->setPen( pal.dark().color() );
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p->drawLine( rect.topLeft(), rect.bottomLeft() );
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return;
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}
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if ( rect.height() == 0.0 )
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{
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p->setPen( pal.dark().color() );
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p->drawLine( rect.topLeft(), rect.topRight() );
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return;
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}
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lw = qMin( lw, rect.height() / 2.0 - 1.0 );
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lw = qMin( lw, rect.width() / 2.0 - 1.0 );
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const QRectF outerRect = rect.adjusted( 0, 0, 1, 1 );
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QPolygonF polygon( outerRect );
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if ( outerRect.width() > 2 * lw &&
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outerRect.height() > 2 * lw )
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{
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const QRectF innerRect = outerRect.adjusted( lw, lw, -lw, -lw );
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polygon = polygon.subtracted( innerRect );
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}
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p->setPen( Qt::NoPen );
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p->setBrush( pal.dark() );
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p->drawPolygon( polygon );
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}
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const QRectF windowRect = rect.adjusted( lw, lw, -lw + 1, -lw + 1 );
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if ( windowRect.isValid() )
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p->fillRect( windowRect, pal.window() );
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}
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static void qwtDrawPanel( QPainter *painter, const QRectF &rect,
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const QPalette &pal, double lw )
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{
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if ( lw > 0.0 )
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{
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if ( rect.width() == 0.0 )
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{
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painter->setPen( pal.window().color() );
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painter->drawLine( rect.topLeft(), rect.bottomLeft() );
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return;
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}
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if ( rect.height() == 0.0 )
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{
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painter->setPen( pal.window().color() );
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painter->drawLine( rect.topLeft(), rect.topRight() );
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return;
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}
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lw = qMin( lw, rect.height() / 2.0 - 1.0 );
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lw = qMin( lw, rect.width() / 2.0 - 1.0 );
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const QRectF outerRect = rect.adjusted( 0, 0, 1, 1 );
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const QRectF innerRect = outerRect.adjusted( lw, lw, -lw, -lw );
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QPolygonF lines[2];
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lines[0] += outerRect.bottomLeft();
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lines[0] += outerRect.topLeft();
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lines[0] += outerRect.topRight();
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lines[0] += innerRect.topRight();
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lines[0] += innerRect.topLeft();
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lines[0] += innerRect.bottomLeft();
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lines[1] += outerRect.topRight();
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lines[1] += outerRect.bottomRight();
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lines[1] += outerRect.bottomLeft();
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lines[1] += innerRect.bottomLeft();
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lines[1] += innerRect.bottomRight();
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lines[1] += innerRect.topRight();
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painter->setPen( Qt::NoPen );
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painter->setBrush( pal.light() );
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painter->drawPolygon( lines[0] );
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painter->setBrush( pal.dark() );
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painter->drawPolygon( lines[1] );
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}
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painter->fillRect( rect.adjusted( lw, lw, -lw + 1, -lw + 1 ), pal.window() );
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}
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class QwtColumnSymbol::PrivateData
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{
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public:
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PrivateData():
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style( QwtColumnSymbol::Box ),
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frameStyle( QwtColumnSymbol::Raised ),
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palette( Qt::gray ),
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lineWidth( 2 )
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{
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}
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QwtColumnSymbol::Style style;
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QwtColumnSymbol::FrameStyle frameStyle;
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QPalette palette;
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int lineWidth;
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};
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/*!
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Constructor
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\param style Style of the symbol
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\sa setStyle(), style(), Style
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*/
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QwtColumnSymbol::QwtColumnSymbol( Style style )
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{
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d_data = new PrivateData();
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d_data->style = style;
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}
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//! Destructor
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QwtColumnSymbol::~QwtColumnSymbol()
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{
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delete d_data;
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}
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/*!
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Specify the symbol style
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\param style Style
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\sa style(), setPalette()
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*/
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void QwtColumnSymbol::setStyle( Style style )
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{
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d_data->style = style;
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}
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/*!
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\return Current symbol style
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\sa setStyle()
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*/
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QwtColumnSymbol::Style QwtColumnSymbol::style() const
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{
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return d_data->style;
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}
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/*!
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Assign a palette for the symbol
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\param palette Palette
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\sa palette(), setStyle()
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*/
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void QwtColumnSymbol::setPalette( const QPalette &palette )
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{
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d_data->palette = palette;
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}
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/*!
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\return Current palette
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\sa setPalette()
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*/
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const QPalette& QwtColumnSymbol::palette() const
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{
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return d_data->palette;
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}
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/*!
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Set the frame, that is used for the Box style.
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\param frameStyle Frame style
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\sa frameStyle(), setLineWidth(), setStyle()
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*/
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void QwtColumnSymbol::setFrameStyle( FrameStyle frameStyle )
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{
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d_data->frameStyle = frameStyle;
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}
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/*!
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\return Current frame style, that is used for the Box style.
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\sa setFrameStyle(), lineWidth(), setStyle()
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*/
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QwtColumnSymbol::FrameStyle QwtColumnSymbol::frameStyle() const
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{
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return d_data->frameStyle;
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}
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/*!
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Set the line width of the frame, that is used for the Box style.
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\param width Width
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\sa lineWidth(), setFrameStyle()
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*/
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void QwtColumnSymbol::setLineWidth( int width )
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{
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if ( width < 0 )
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width = 0;
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d_data->lineWidth = width;
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}
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/*!
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\return Line width of the frame, that is used for the Box style.
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\sa setLineWidth(), frameStyle(), setStyle()
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*/
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int QwtColumnSymbol::lineWidth() const
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{
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return d_data->lineWidth;
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}
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/*!
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Draw the symbol depending on its style.
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\param painter Painter
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\param rect Directed rectangle
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\sa drawBox()
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*/
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void QwtColumnSymbol::draw( QPainter *painter,
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const QwtColumnRect &rect ) const
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{
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painter->save();
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switch ( d_data->style )
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{
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case QwtColumnSymbol::Box:
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{
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drawBox( painter, rect );
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break;
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}
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default:;
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}
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painter->restore();
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}
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/*!
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Draw the symbol when it is in Box style.
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\param painter Painter
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\param rect Directed rectangle
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\sa draw()
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*/
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void QwtColumnSymbol::drawBox( QPainter *painter,
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const QwtColumnRect &rect ) const
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{
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QRectF r = rect.toRect();
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if ( QwtPainter::roundingAlignment( painter ) )
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{
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r.setLeft( qRound( r.left() ) );
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r.setRight( qRound( r.right() ) );
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r.setTop( qRound( r.top() ) );
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r.setBottom( qRound( r.bottom() ) );
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}
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switch ( d_data->frameStyle )
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{
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case QwtColumnSymbol::Raised:
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{
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qwtDrawPanel( painter, r, d_data->palette, d_data->lineWidth );
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break;
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}
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case QwtColumnSymbol::Plain:
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{
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qwtDrawBox( painter, r, d_data->palette, d_data->lineWidth );
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break;
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}
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default:
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{
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painter->fillRect( r.adjusted( 0, 0, 1, 1 ), d_data->palette.window() );
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}
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}
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}
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