mitk: qwt_plot_item.cpp Source File

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00001 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
00002  * Qwt Widget Library
00003  * Copyright (C) 1997   Josef Wilgen
00004  * Copyright (C) 2002   Uwe Rathmann
00005  * 
00006  * This library is free software; you can redistribute it and/or
00007  * modify it under the terms of the Qwt License, Version 1.0
00008  *****************************************************************************/
00009 
00010 #include "qwt_text.h"
00011 #include "qwt_plot.h"
00012 #include "qwt_legend.h"
00013 #include "qwt_legend_item.h"
00014 #include "qwt_plot_item.h"
00015 
00016 class QwtPlotItem::PrivateData
00017 {
00018 public:
00019     PrivateData():
00020         plot(NULL),
00021         isVisible(true),
00022         attributes(0),
00023 #if QT_VERSION >= 0x040000
00024         renderHints(0),
00025 #endif
00026         z(0.0),
00027         xAxis(QwtPlot::xBottom),
00028         yAxis(QwtPlot::yLeft)
00029     {
00030     }
00031 
00032     mutable QwtPlot *plot;
00033 
00034     bool isVisible;
00035     int attributes;
00036 #if QT_VERSION >= 0x040000
00037     int renderHints;
00038 #endif
00039     double z;
00040 
00041     int xAxis;
00042     int yAxis;
00043 
00044     QwtText title;
00045 };
00046 
00051 QwtPlotItem::QwtPlotItem(const QwtText &title)
00052 {
00053     d_data = new PrivateData;
00054     d_data->title = title;
00055 }
00056 
00058 QwtPlotItem::~QwtPlotItem()
00059 {
00060     attach(NULL);
00061     delete d_data;
00062 }
00063 
00075 void QwtPlotItem::attach(QwtPlot *plot)
00076 {
00077     if ( plot == d_data->plot )
00078         return;
00079 
00080     // remove the item from the previous plot
00081 
00082     if ( d_data->plot )
00083     {
00084         if ( d_data->plot->legend() )
00085         {
00086             QWidget *legendItem = d_data->plot->legend()->find(this);
00087             if ( legendItem )
00088                 delete legendItem; 
00089         }
00090 
00091         d_data->plot->attachItem(this, false);
00092 
00093         if ( d_data->plot->autoReplot() )
00094             d_data->plot->update();
00095     }
00096 
00097     d_data->plot = plot;
00098 
00099     if ( d_data->plot )
00100     {
00101         // insert the item into the current plot
00102 
00103         d_data->plot->attachItem(this, true);
00104         itemChanged();
00105     }
00106 }
00107 
00120 int QwtPlotItem::rtti() const
00121 {
00122     return Rtti_PlotItem;
00123 }
00124 
00126 QwtPlot *QwtPlotItem::plot() const 
00127 { 
00128     return d_data->plot; 
00129 }
00130 
00136 double QwtPlotItem::z() const 
00137 { 
00138     return d_data->z; 
00139 }
00140 
00149 void QwtPlotItem::setZ(double z) 
00150 { 
00151     if ( d_data->z != z )
00152     {
00153         d_data->z = z; 
00154         if ( d_data->plot )
00155         {
00156             // update the z order
00157             d_data->plot->attachItem(this, false);
00158             d_data->plot->attachItem(this, true);
00159         }
00160         itemChanged();
00161     }
00162 }
00163 
00170 void QwtPlotItem::setTitle(const QString &title)
00171 {
00172     setTitle(QwtText(title));
00173 }
00174 
00181 void QwtPlotItem::setTitle(const QwtText &title)
00182 {
00183     if ( d_data->title != title )
00184     {
00185         d_data->title = title; 
00186         itemChanged();
00187     }
00188 }
00189 
00194 const QwtText &QwtPlotItem::title() const
00195 {
00196     return d_data->title;
00197 }
00198 
00207 void QwtPlotItem::setItemAttribute(ItemAttribute attribute, bool on)
00208 {
00209     if ( bool(d_data->attributes & attribute) != on )
00210     {
00211         if ( on )
00212             d_data->attributes |= attribute;
00213         else
00214             d_data->attributes &= ~attribute;
00215 
00216         itemChanged();
00217     }
00218 }
00219 
00227 bool QwtPlotItem::testItemAttribute(ItemAttribute attribute) const
00228 {
00229     return d_data->attributes & attribute;
00230 }
00231 
00232 #if QT_VERSION >= 0x040000
00233 
00242 void QwtPlotItem::setRenderHint(RenderHint hint, bool on)
00243 {
00244     if ( ((d_data->renderHints & hint) != 0) != on )
00245     {
00246         if ( on )
00247             d_data->renderHints |= hint;
00248         else
00249             d_data->renderHints &= ~hint;
00250 
00251         itemChanged();
00252     }
00253 }
00254 
00262 bool QwtPlotItem::testRenderHint(RenderHint hint) const
00263 {
00264     return (d_data->renderHints & hint);
00265 }
00266 
00267 #endif
00268 
00270 void QwtPlotItem::show()
00271 {
00272     setVisible(true);
00273 }
00274 
00276 void QwtPlotItem::hide()
00277 {
00278     setVisible(false);
00279 }
00280 
00287 void QwtPlotItem::setVisible(bool on) 
00288 { 
00289     if ( on != d_data->isVisible )
00290     {
00291         d_data->isVisible = on; 
00292         itemChanged(); 
00293     }
00294 }
00295 
00300 bool QwtPlotItem::isVisible() const
00301 { 
00302     return d_data->isVisible; 
00303 }
00304 
00311 void QwtPlotItem::itemChanged()
00312 {
00313     if ( d_data->plot )
00314     {
00315         if ( d_data->plot->legend() )
00316             updateLegend(d_data->plot->legend());
00317 
00318         d_data->plot->autoRefresh();
00319     }
00320 }
00321 
00332 void QwtPlotItem::setAxis(int xAxis, int yAxis)
00333 {
00334     if (xAxis == QwtPlot::xBottom || xAxis == QwtPlot::xTop )
00335        d_data->xAxis = xAxis;
00336 
00337     if (yAxis == QwtPlot::yLeft || yAxis == QwtPlot::yRight )
00338        d_data->yAxis = yAxis;
00339 
00340     itemChanged();    
00341 }
00342 
00351 void QwtPlotItem::setXAxis(int axis)
00352 {
00353     if (axis == QwtPlot::xBottom || axis == QwtPlot::xTop )
00354     {
00355        d_data->xAxis = axis;
00356        itemChanged();    
00357     }
00358 }
00359 
00368 void QwtPlotItem::setYAxis(int axis)
00369 {
00370     if (axis == QwtPlot::yLeft || axis == QwtPlot::yRight )
00371     {
00372        d_data->yAxis = axis;
00373        itemChanged();   
00374     }
00375 }
00376 
00378 int QwtPlotItem::xAxis() const 
00379 { 
00380     return d_data->xAxis; 
00381 }
00382 
00384 int QwtPlotItem::yAxis() const 
00385 { 
00386     return d_data->yAxis; 
00387 }
00388 
00392 QwtDoubleRect QwtPlotItem::boundingRect() const
00393 {
00394     return QwtDoubleRect(1.0, 1.0, -2.0, -2.0); // invalid
00395 }
00396 
00407 QWidget *QwtPlotItem::legendItem() const
00408 {
00409     return new QwtLegendItem;
00410 }
00411 
00426 void QwtPlotItem::updateLegend(QwtLegend *legend) const
00427 {
00428     if ( !legend )
00429         return;
00430 
00431     QWidget *lgdItem = legend->find(this);
00432     if ( testItemAttribute(QwtPlotItem::Legend) )
00433     {
00434         if ( lgdItem == NULL )
00435         {
00436             lgdItem = legendItem();
00437             if ( lgdItem )
00438             {
00439                 if ( lgdItem->inherits("QwtLegendItem") )
00440                 {
00441                     QwtLegendItem *label = (QwtLegendItem *)lgdItem;
00442                     label->setItemMode(legend->itemMode());
00443 
00444                     if ( d_data->plot )
00445                     {
00446                         QObject::connect(label, SIGNAL(clicked()), 
00447                             d_data->plot, SLOT(legendItemClicked()));
00448                         QObject::connect(label, SIGNAL(checked(bool)), 
00449                             d_data->plot, SLOT(legendItemChecked(bool)));
00450                     }
00451                 }
00452                 legend->insert(this, lgdItem);
00453             }
00454         }
00455         if ( lgdItem && lgdItem->inherits("QwtLegendItem") )
00456         {
00457             QwtLegendItem* label = (QwtLegendItem*)lgdItem;
00458             if ( label )
00459                 label->setText(d_data->title);
00460         }
00461     }
00462     else
00463     {
00464         delete lgdItem;
00465     }
00466 }
00467 
00481 void QwtPlotItem::updateScaleDiv(const QwtScaleDiv &,
00482     const QwtScaleDiv &) 
00483 { 
00484 }
00485 
00494 QwtDoubleRect QwtPlotItem::scaleRect(const QwtScaleMap &xMap, 
00495     const QwtScaleMap &yMap) const
00496 {
00497     return QwtDoubleRect(xMap.s1(), yMap.s1(), 
00498         xMap.sDist(), yMap.sDist() );
00499 }
00500 
00509 QRect QwtPlotItem::paintRect(const QwtScaleMap &xMap, 
00510     const QwtScaleMap &yMap) const
00511 {
00512     const QRect rect( qRound(xMap.p1()), qRound(yMap.p1()),
00513         qRound(xMap.pDist()), qRound(yMap.pDist()) );
00514 
00515     return rect;
00516 }
00517 
00528 QRect QwtPlotItem::transform(const QwtScaleMap &xMap, 
00529     const QwtScaleMap &yMap, const QwtDoubleRect& rect) const
00530 {
00531     int x1 = qRound(xMap.transform(rect.left()));
00532     int x2 = qRound(xMap.transform(rect.right()));
00533     int y1 = qRound(yMap.transform(rect.top()));
00534     int y2 = qRound(yMap.transform(rect.bottom()));
00535 
00536     if ( x2 < x1 )
00537         qSwap(x1, x2);
00538     if ( y2 < y1 )
00539         qSwap(y1, y2);
00540 
00541     return QRect(x1, y1, x2 - x1 + 1, y2 - y1 + 1);
00542 }
00543 
00553 QwtDoubleRect QwtPlotItem::invTransform(const QwtScaleMap &xMap, 
00554     const QwtScaleMap &yMap, const QRect& rect) const
00555 {
00556     const double x1 = xMap.invTransform(rect.left());
00557     const double x2 = xMap.invTransform(rect.right());
00558     const double y1 = yMap.invTransform(rect.top());
00559     const double y2 = yMap.invTransform(rect.bottom());
00560         
00561     const QwtDoubleRect r(x1, y1, x2 - x1, y2 - y1);
00562 
00563     return r.normalized();
00564 }