彻底改版2.0
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feiyangqingyun
308
third/3rd_qwt/qwt_compass.cpp
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308
third/3rd_qwt/qwt_compass.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_compass.h"
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#include "qwt_compass_rose.h"
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#include "qwt_math.h"
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#include "qwt_scale_draw.h"
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#include "qwt_painter.h"
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#include "qwt_dial_needle.h"
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#include <qpainter.h>
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#include <qpixmap.h>
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#include <qevent.h>
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/*!
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\brief Constructor
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Initializes a label map for multiples of 45 degrees
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*/
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QwtCompassScaleDraw::QwtCompassScaleDraw()
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{
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enableComponent( QwtAbstractScaleDraw::Backbone, false );
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enableComponent( QwtAbstractScaleDraw::Ticks, false );
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d_labelMap.insert( 0.0, QString::fromLatin1( "N" ) );
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d_labelMap.insert( 45.0, QString::fromLatin1( "NE" ) );
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d_labelMap.insert( 90.0, QString::fromLatin1( "E" ) );
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d_labelMap.insert( 135.0, QString::fromLatin1( "SE" ) );
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d_labelMap.insert( 180.0, QString::fromLatin1( "S" ) );
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d_labelMap.insert( 225.0, QString::fromLatin1( "SW" ) );
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d_labelMap.insert( 270.0, QString::fromLatin1( "W" ) );
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d_labelMap.insert( 315.0, QString::fromLatin1( "NW" ) );
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#if 0
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d_labelMap.insert( 22.5, QString::fromLatin1( "NNE" ) );
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d_labelMap.insert( 67.5, QString::fromLatin1( "NEE" ) );
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d_labelMap.insert( 112.5, QString::fromLatin1( "SEE" ) );
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d_labelMap.insert( 157.5, QString::fromLatin1( "SSE" ) );
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d_labelMap.insert( 202.5, QString::fromLatin1( "SSW" ) );
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d_labelMap.insert( 247.5, QString::fromLatin1( "SWW" ) );
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d_labelMap.insert( 292.5, QString::fromLatin1( "NWW" ) );
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d_labelMap.insert( 337.5, QString::fromLatin1( "NNW" ) );
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#endif
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}
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/*!
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\brief Constructor
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\param map Value to label map
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*/
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QwtCompassScaleDraw::QwtCompassScaleDraw( const QMap<double, QString> &map ):
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d_labelMap( map )
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{
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enableComponent( QwtAbstractScaleDraw::Backbone, false );
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enableComponent( QwtAbstractScaleDraw::Ticks, false );
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}
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/*!
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\brief Set a map, mapping values to labels
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\param map Value to label map
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The values of the major ticks are found by looking into this
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map. The default map consists of the labels N, NE, E, SE, S, SW, W, NW.
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\warning The map will have no effect for values that are no major
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tick values. Major ticks can be changed by QwtScaleDraw::setScale
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\sa labelMap(), scaleDraw(), setScale()
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*/
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void QwtCompassScaleDraw::setLabelMap( const QMap<double, QString> &map )
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{
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d_labelMap = map;
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}
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/*!
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\return map, mapping values to labels
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\sa setLabelMap()
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*/
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QMap<double, QString> QwtCompassScaleDraw::labelMap() const
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{
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return d_labelMap;
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}
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/*!
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Map a value to a corresponding label
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\param value Value that will be mapped
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label() looks in the labelMap() for a corresponding label for value
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or returns an null text.
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\return Label
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\sa labelMap(), setLabelMap()
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*/
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QwtText QwtCompassScaleDraw::label( double value ) const
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{
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if ( qFuzzyCompare( value + 1.0, 1.0 ) )
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value = 0.0;
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if ( value < 0.0 )
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value += 360.0;
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if ( d_labelMap.contains( value ) )
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return d_labelMap[value];
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return QwtText();
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}
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class QwtCompass::PrivateData
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{
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public:
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PrivateData():
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rose( NULL )
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{
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}
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~PrivateData()
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{
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delete rose;
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}
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QwtCompassRose *rose;
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};
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/*!
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\brief Constructor
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\param parent Parent widget
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Create a compass widget with a scale, no needle and no rose.
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The default origin is 270.0 with no valid value. It accepts
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mouse and keyboard inputs and has no step size. The default mode
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is QwtDial::RotateNeedle.
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*/
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QwtCompass::QwtCompass( QWidget* parent ):
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QwtDial( parent )
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{
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d_data = new PrivateData;
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setScaleDraw( new QwtCompassScaleDraw() );
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setOrigin( 270.0 );
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setWrapping( true );
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setScaleMaxMajor( 36 );
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setScaleMaxMinor( 10 );
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setScale( 0.0, 360.0 ); // degrees as default
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setTotalSteps( 360 );
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}
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//! Destructor
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QwtCompass::~QwtCompass()
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{
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delete d_data;
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}
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/*!
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Draw the contents of the scale
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\param painter Painter
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\param center Center of the content circle
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\param radius Radius of the content circle
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*/
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void QwtCompass::drawScaleContents( QPainter *painter,
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const QPointF ¢er, double radius ) const
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{
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QPalette::ColorGroup cg;
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if ( isEnabled() )
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cg = hasFocus() ? QPalette::Active : QPalette::Inactive;
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else
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cg = QPalette::Disabled;
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double north = origin();
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if ( isValid() )
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{
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if ( mode() == RotateScale )
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north -= value();
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}
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const int margin = 4;
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drawRose( painter, center, radius - margin, 360.0 - north, cg );
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}
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/*!
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Draw the compass rose
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\param painter Painter
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\param center Center of the compass
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\param radius of the circle, where to paint the rose
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\param north Direction pointing north, in degrees counter clockwise
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\param cg Color group
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*/
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void QwtCompass::drawRose( QPainter *painter, const QPointF ¢er,
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double radius, double north, QPalette::ColorGroup cg ) const
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{
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if ( d_data->rose )
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d_data->rose->draw( painter, center, radius, north, cg );
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}
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/*!
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Set a rose for the compass
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\param rose Compass rose
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\warning The rose will be deleted, when a different rose is
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set or in ~QwtCompass
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\sa rose()
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*/
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void QwtCompass::setRose( QwtCompassRose *rose )
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{
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if ( rose != d_data->rose )
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{
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if ( d_data->rose )
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delete d_data->rose;
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d_data->rose = rose;
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update();
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}
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}
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/*!
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\return rose
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\sa setRose()
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*/
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const QwtCompassRose *QwtCompass::rose() const
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{
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return d_data->rose;
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}
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/*!
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\return rose
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\sa setRose()
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*/
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QwtCompassRose *QwtCompass::rose()
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{
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return d_data->rose;
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}
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/*!
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Handles key events
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Beside the keys described in QwtDial::keyPressEvent numbers
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from 1-9 (without 5) set the direction according to their
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position on the num pad.
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\sa isReadOnly()
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*/
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void QwtCompass::keyPressEvent( QKeyEvent *kev )
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{
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if ( isReadOnly() )
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return;
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#if 0
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if ( kev->key() == Key_5 )
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{
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invalidate(); // signal ???
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return;
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}
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#endif
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double newValue = value();
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if ( kev->key() >= Qt::Key_1 && kev->key() <= Qt::Key_9 )
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{
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if ( mode() != RotateNeedle || kev->key() == Qt::Key_5 )
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return;
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switch ( kev->key() )
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{
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case Qt::Key_6:
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newValue = 180.0 * 0.0;
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break;
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case Qt::Key_3:
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newValue = 180.0 * 0.25;
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break;
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case Qt::Key_2:
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newValue = 180.0 * 0.5;
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break;
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case Qt::Key_1:
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newValue = 180.0 * 0.75;
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break;
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case Qt::Key_4:
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newValue = 180.0 * 1.0;
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break;
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case Qt::Key_7:
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newValue = 180.0 * 1.25;
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break;
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case Qt::Key_8:
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newValue = 180.0 * 1.5;
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break;
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case Qt::Key_9:
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newValue = 180.0 * 1.75;
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break;
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}
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newValue -= origin();
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setValue( newValue );
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}
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else
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{
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QwtDial::keyPressEvent( kev );
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}
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}
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