File indexing completed on 2024-05-12 15:54:11

 /*
  * Copyright (C) 2001-2015 Klaralvdalens Datakonsult AB.  All rights reserved.
  *
  * This file is part of the KD Chart library.
  *
  * This program is free software; you can redistribute it and/or
  * modify it under the terms of the GNU General Public License as
  * published by the Free Software Foundation; either version 2 of
  * the License, or (at your option) any later version.
  *
  * This program is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
 #include "KChartAbstractCoordinatePlane.h"
 #include "KChartAbstractCoordinatePlane_p.h"
 
 #include "KChartChart.h"
 #include "KChartGridAttributes.h"
 
 #include <QGridLayout>
 #include <QRubberBand>
 #include <QMouseEvent>
 #include <qmath.h>
 
 using namespace KChart;
 
 #define d d_func()
 
 AbstractCoordinatePlane::Private::Private()
     : AbstractArea::Private()
     , parent( nullptr )
     , grid( nullptr )
     , referenceCoordinatePlane( nullptr )
     , enableCornerSpacers( true )
     , enableRubberBandZooming( false )
     , rubberBand( nullptr )
 {
     // this bloc left empty intentionally
 }
 
 
 AbstractCoordinatePlane::AbstractCoordinatePlane ( KChart::Chart* parent )
     : AbstractArea ( new Private() )
 {
     d->parent = parent;
     d->init();
 }
 
 AbstractCoordinatePlane::~AbstractCoordinatePlane()
 {
     Q_EMIT destroyedCoordinatePlane( this );
 }
 
 void AbstractCoordinatePlane::init()
 {
     d->initialize();  // virtual method to init the correct grid: cartesian, polar, ...
     connect( this, SIGNAL(internal_geometryChanged(QRect,QRect)),
              this, SIGNAL(geometryChanged(QRect,QRect)),
              Qt::QueuedConnection );
 }
 
 void AbstractCoordinatePlane::addDiagram ( AbstractDiagram* diagram )
 {
     // diagrams are invisible and paint through their paint() method
     diagram->hide();
 
     d->diagrams.append( diagram );
     diagram->setParent( d->parent );
     diagram->setCoordinatePlane( this );
     layoutDiagrams();
     layoutPlanes(); // there might be new axes, etc
     connect( diagram, SIGNAL(modelsChanged()), this, SLOT(layoutPlanes()) );
     connect( diagram, SIGNAL(modelDataChanged()), this, SLOT(update()) );
     connect( diagram, SIGNAL(modelDataChanged()), this, SLOT(relayout()) );
     connect( this, SIGNAL(boundariesChanged()), diagram, SIGNAL(boundariesChanged()) );
 
     update();
     Q_EMIT boundariesChanged();
 }
 
 /*virtual*/
 void AbstractCoordinatePlane::replaceDiagram ( AbstractDiagram* diagram, AbstractDiagram* oldDiagram_ )
 {
     if ( diagram && oldDiagram_ != diagram ) {
         AbstractDiagram* oldDiagram = oldDiagram_;
         if ( d->diagrams.count() ) {
             if ( ! oldDiagram ) {
                 oldDiagram = d->diagrams.first();
                 if ( oldDiagram == diagram )
                     return;
             }
             takeDiagram( oldDiagram );
         }
         delete oldDiagram;
         addDiagram( diagram );
         layoutDiagrams();
         layoutPlanes(); // there might be new axes, etc
         update();
     }
 }
 
 /*virtual*/
 void AbstractCoordinatePlane::takeDiagram ( AbstractDiagram* diagram )
 {
     const int idx = d->diagrams.indexOf( diagram );
     if ( idx != -1 ) {
         d->diagrams.removeAt( idx );
         diagram->setParent( nullptr );
         diagram->setCoordinatePlane( nullptr );
         disconnect( diagram, SIGNAL(modelsChanged()), this, SLOT(layoutPlanes()) );
         disconnect( diagram, SIGNAL(modelDataChanged()), this, SLOT(update()) );
         disconnect( diagram, SIGNAL(modelDataChanged()), this, SLOT(relayout()) );
         layoutDiagrams();
         update();
     }
 }
 
 
 AbstractDiagram* AbstractCoordinatePlane::diagram()
 {
     if ( d->diagrams.isEmpty() )
     {
         return nullptr;
     } else {
         return d->diagrams.first();
     }
 }
 
 AbstractDiagramList AbstractCoordinatePlane::diagrams()
 {
     return d->diagrams;
 }
 
 ConstAbstractDiagramList AbstractCoordinatePlane::diagrams() const
 {
     ConstAbstractDiagramList list;
 #ifndef QT_NO_STL
     qCopy( d->diagrams.begin(), d->diagrams.end(), std::back_inserter( list ) );
 #else
     Q_FOREACH( AbstractDiagram * a, d->diagrams )
         list.push_back( a );
 #endif
     return list;
 }
 
 void KChart::AbstractCoordinatePlane::setGlobalGridAttributes( const GridAttributes& a )
 {
     d->gridAttributes = a;
     update();
 }
 
 GridAttributes KChart::AbstractCoordinatePlane::globalGridAttributes() const
 {
     return d->gridAttributes;
 }
 
 KChart::DataDimensionsList KChart::AbstractCoordinatePlane::gridDimensionsList()
 {
     return d->grid->updateData( this );
 }
 
 void KChart::AbstractCoordinatePlane::setGridNeedsRecalculate()
 {
     d->grid->setNeedRecalculate();
 }
 
 void KChart::AbstractCoordinatePlane::setReferenceCoordinatePlane( AbstractCoordinatePlane * plane )
 {
     d->referenceCoordinatePlane = plane;
 }
 
 AbstractCoordinatePlane * KChart::AbstractCoordinatePlane::referenceCoordinatePlane( ) const
 {
     return d->referenceCoordinatePlane;
 }
 
 void KChart::AbstractCoordinatePlane::setParent( KChart::Chart* parent )
 {
     d->parent = parent;
 }
 
 const KChart::Chart* KChart::AbstractCoordinatePlane::parent() const
 {
     return d->parent;
 }
 
 KChart::Chart* KChart::AbstractCoordinatePlane::parent()
 {
     return d->parent;
 }
 
 /* pure virtual in QLayoutItem */
 bool KChart::AbstractCoordinatePlane::isEmpty() const
 {
     return false; // never empty!
     // coordinate planes with no associated diagrams
     // are showing a default grid of ()1..10, 1..10) stepWidth 1
 }
 /* pure virtual in QLayoutItem */
 Qt::Orientations KChart::AbstractCoordinatePlane::expandingDirections() const
 {
     return Qt::Vertical | Qt::Horizontal;
 }
 /* pure virtual in QLayoutItem */
 QSize KChart::AbstractCoordinatePlane::maximumSize() const
 {
     // No maximum size set. Especially not parent()->size(), we are not layouting
     // to the parent widget's size when using Chart::paint()!
     return QSize(QLAYOUTSIZE_MAX, QLAYOUTSIZE_MAX);
 }
 /* pure virtual in QLayoutItem */
 QSize KChart::AbstractCoordinatePlane::minimumSize() const
 {
     return QSize(60, 60); // this default can be overwritten by derived classes
 }
 /* pure virtual in QLayoutItem */
 QSize KChart::AbstractCoordinatePlane::sizeHint() const
 {
     // we return our maxiumu (which is the full size of the Chart)
     // even if we know the plane will be smaller
     return maximumSize();
 }
 /* pure virtual in QLayoutItem */
 void KChart::AbstractCoordinatePlane::setGeometry( const QRect& r )
 {
     if ( d->geometry != r ) {
         // inform the outside word by Signal geometryChanged()
         // via a queued connection to internal_geometryChanged()
         Q_EMIT internal_geometryChanged( d->geometry, r );
 
         d->geometry = r;
         // Note: We do *not* call update() here
         //       because it would invoke KChart::update() recursively.
     }
 }
 /* pure virtual in QLayoutItem */
 QRect KChart::AbstractCoordinatePlane::geometry() const
 {
     return d->geometry;
 }
 
 void KChart::AbstractCoordinatePlane::update()
 {
     //qDebug("KChart::AbstractCoordinatePlane::update() called");
     Q_EMIT needUpdate();
 }
 
 void KChart::AbstractCoordinatePlane::relayout()
 {
     //qDebug("KChart::AbstractCoordinatePlane::relayout() called");
     Q_EMIT needRelayout();
 }
 
 void KChart::AbstractCoordinatePlane::layoutPlanes()
 {
     //qDebug("KChart::AbstractCoordinatePlane::relayout() called");
     Q_EMIT needLayoutPlanes();
 }
 
 void KChart::AbstractCoordinatePlane::setRubberBandZoomingEnabled( bool enable )
 {
     d->enableRubberBandZooming = enable;
 
     if ( !enable && d->rubberBand != nullptr )
     {
         delete d->rubberBand;
         d->rubberBand = nullptr;
     }
 }
 
 bool KChart::AbstractCoordinatePlane::isRubberBandZoomingEnabled() const
 {
     return d->enableRubberBandZooming;
 }
 
 void KChart::AbstractCoordinatePlane::setCornerSpacersEnabled( bool enable )
 {
     if ( d->enableCornerSpacers == enable ) return;
 
     d->enableCornerSpacers = enable;
     Q_EMIT needRelayout();
 }
 
 bool KChart::AbstractCoordinatePlane::isCornerSpacersEnabled() const
 {
     return d->enableCornerSpacers;
 }
 
 void KChart::AbstractCoordinatePlane::mousePressEvent( QMouseEvent* event )
 {
     if ( event->button() == Qt::LeftButton )
     {
         if ( d->enableRubberBandZooming && d->rubberBand == nullptr )
             d->rubberBand = new QRubberBand( QRubberBand::Rectangle, qobject_cast< QWidget* >( parent() ) );
 
         if ( d->rubberBand != nullptr )
         {
             d->rubberBandOrigin = event->pos();
             d->rubberBand->setGeometry( QRect( event->pos(), QSize() ) );
             d->rubberBand->show();
 
             event->accept();
         }
     }
     else if ( event->button() == Qt::RightButton )
     {
         if ( d->enableRubberBandZooming && !d->rubberBandZoomConfigHistory.isEmpty() )
         {
             // restore the last config from the stack
             ZoomParameters config = d->rubberBandZoomConfigHistory.pop();
             setZoomFactorX( config.xFactor );
             setZoomFactorY( config.yFactor );
             setZoomCenter( config.center() );
 
             QWidget* const p = qobject_cast< QWidget* >( parent() );
             if ( p != nullptr )
                 p->update();
 
             event->accept();
         }
     }
 
     Q_FOREACH( AbstractDiagram * a, d->diagrams )
     {
         a->mousePressEvent( event );
     }
 }
 
 void KChart::AbstractCoordinatePlane::mouseDoubleClickEvent( QMouseEvent* event )
 {
     if ( event->button() == Qt::RightButton )
     {
         // othewise the second click gets lost
         // which is pretty annoying when zooming out fast
         mousePressEvent( event );
     }
     Q_FOREACH( AbstractDiagram * a, d->diagrams )
     {
         a->mouseDoubleClickEvent( event );
     }
 }
 
 void KChart::AbstractCoordinatePlane::mouseReleaseEvent( QMouseEvent* event )
 {
     if ( d->rubberBand != nullptr )
     {
         // save the old config on the stack
         d->rubberBandZoomConfigHistory.push( ZoomParameters( zoomFactorX(), zoomFactorY(), zoomCenter() ) );
 
         // this is the height/width of the rubber band in pixel space
         const qreal rubberWidth = static_cast< qreal >( d->rubberBand->width() );
         const qreal rubberHeight = static_cast< qreal >( d->rubberBand->height() );
 
         if ( rubberWidth > 0.0 && rubberHeight > 0.0 )
         {
             // this is the center of the rubber band in pixel space
             const qreal centerX = qFloor( d->rubberBand->geometry().width() / 2.0 + d->rubberBand->geometry().x() );
             const qreal centerY = qCeil( d->rubberBand->geometry().height() / 2.0 + d->rubberBand->geometry().y() );
 
             const qreal rubberCenterX = static_cast< qreal >( centerX - geometry().x() );
             const qreal rubberCenterY = static_cast< qreal >( centerY - geometry().y() );
 
             // this is the height/width of the plane in pixel space
             const qreal myWidth = static_cast< qreal >( geometry().width() );
             const qreal myHeight = static_cast< qreal >( geometry().height() );
 
             // this describes the new center of zooming, relative to the plane pixel space
             const qreal newCenterX = rubberCenterX / myWidth / zoomFactorX() + zoomCenter().x() - 0.5 / zoomFactorX();
             const qreal newCenterY = rubberCenterY / myHeight / zoomFactorY() + zoomCenter().y() - 0.5 / zoomFactorY();
 
             // this will be the new zoom factor
             const qreal newZoomFactorX = zoomFactorX() * myWidth / rubberWidth;
             const qreal newZoomFactorY = zoomFactorY() * myHeight / rubberHeight;
 
             // and this the new center
             const QPointF newZoomCenter( newCenterX, newCenterY );
 
             setZoomFactorX( newZoomFactorX );
             setZoomFactorY( newZoomFactorY );
             setZoomCenter( newZoomCenter );
         }
 
         d->rubberBand->parentWidget()->update();
         delete d->rubberBand;
         d->rubberBand = nullptr;
 
         event->accept();
     }
 
     Q_FOREACH( AbstractDiagram * a, d->diagrams )
     {
         a->mouseReleaseEvent( event );
     }
 }
 
 void KChart::AbstractCoordinatePlane::mouseMoveEvent( QMouseEvent* event )
 {
     if ( d->rubberBand != nullptr )
     {
         const QRect normalized = QRect( d->rubberBandOrigin, event->pos() ).normalized();
         d->rubberBand->setGeometry( normalized &  geometry() );
 
         event->accept();
     }
 
     Q_FOREACH( AbstractDiagram * a, d->diagrams )
     {
         a->mouseMoveEvent( event );
     }
 }
 
 #if defined(Q_COMPILER_MANGLES_RETURN_TYPE)
 const
 #endif
 bool KChart::AbstractCoordinatePlane::isVisiblePoint( const QPointF& point ) const
 {
     return d->isVisiblePoint( this, point );
 }
 
 AbstractCoordinatePlane* KChart::AbstractCoordinatePlane::sharedAxisMasterPlane( QPainter* p )
 {
     Q_UNUSED( p );
     return this;
 }
 
 #if !defined(QT_NO_DEBUG_STREAM)
 #include "KChartEnums.h"
 
 QDebug KChart::operator<<( QDebug stream, const DataDimension& r )
 {
     stream << "DataDimension("
            << " start=" << r.start
            << " end=" << r.end
            << " sequence=" << KChartEnums::granularitySequenceToString( r.sequence )
            << " isCalculated=" << r.isCalculated
            << " calcMode=" << ( r.calcMode == AbstractCoordinatePlane::Logarithmic ? "Logarithmic" : "Linear" )
            << " stepWidth=" << r.stepWidth
            << " subStepWidth=" << r.subStepWidth
            << " )";
     return stream;
 }
 #endif
 
 #undef d