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/****************************************************************************
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**
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** Copyright (C) 2012 Digia Plc
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** All rights reserved.
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** For any questions to Digia, please use contact form at http://qt.digia.com
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**
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** This file is part of the Qt Commercial Charts Add-on.
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**
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** $QT_BEGIN_LICENSE$
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** Licensees holding valid Qt Commercial licenses may use this file in
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** accordance with the Qt Commercial License Agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and Digia.
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**
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** If you have questions regarding the use of this file, please use
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** contact form at http://qt.digia.com
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qxymodelmapper.h"
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#include "qxymodelmapper_p.h"
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#include "qxyseries.h"
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#include <QAbstractItemModel>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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/*!
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\class QXYModelMapper
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\brief part of QtCommercial chart API.
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\mainclass
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Model mappers allow you to use QAbstractItemModel derived models as a data source for a chart series.
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The instance of this class cannot be created directly. QHXYModelMapper of QVXYModelMapper should be used instead. This class is used to create a connection between QXYSeries and QAbstractItemModel derived model object.
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It is possible to use both QAbstractItemModel and QXYSeries model API. QXYModelMapper makes sure that QXYSeries and the model are kept in sync.
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NOTE: used model has to support adding/removing rows/columns and modifying the data of the cells.
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*/
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/*!
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\property QXYModelMapper::series
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\brief Defines the QPieSeries object that is used by the mapper.
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All the data in the series is discarded when it is set to the mapper.
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When new series is specified the old series is disconnected (it preserves its data)
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*/
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/*!
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\property QXYModelMapper::model
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\brief Defines the model that is used by the mapper.
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*/
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/*!
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\property QXYModelMapper::first
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\brief Defines which item of the model's row/column should be mapped as the first x/y pair
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Minimal and default value is: 0
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*/
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/*!
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\property QXYModelMapper::count
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\brief Defines the number of rows/columns of the model that are mapped as the data for QXYSeries
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Minimal and default value is: -1 (count limited by the number of rows/columns in the model)
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*/
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/*!
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\fn void QXYModelMapper::seriesReplaced()
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Emitted when the series to which mapper is connected to has changed.
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*/
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/*!
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\fn void QXYModelMapper::modelReplaced()
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Emitted when the model to which mapper is connected to has changed.
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*/
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/*!
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\fn void QXYModelMapper::firstChanged()
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Emitted when the value for the first has changed.
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*/
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/*!
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\fn void QXYModelMapper::countChanged()
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Emitted when the value for the count has changed.
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*/
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/*!
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Constructs a mapper object which is a child of \a parent.
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*/
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QXYModelMapper::QXYModelMapper(QObject *parent):
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QObject(parent),
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d_ptr(new QXYModelMapperPrivate(this))
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{
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}
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QAbstractItemModel* QXYModelMapper::model() const
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{
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Q_D(const QXYModelMapper);
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return d->m_model;
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}
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void QXYModelMapper::setModel(QAbstractItemModel *model)
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{
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if (model == 0)
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return;
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Q_D(QXYModelMapper);
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if (d->m_model) {
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disconnect(d->m_model, 0, d, 0);
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}
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d->m_model = model;
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d->initializeXYFromModel();
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// connect signals from the model
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connect(d->m_model, SIGNAL(dataChanged(QModelIndex,QModelIndex)), d, SLOT(modelUpdated(QModelIndex,QModelIndex)));
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connect(d->m_model, SIGNAL(rowsInserted(QModelIndex,int,int)), d, SLOT(modelRowsAdded(QModelIndex,int,int)));
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connect(d->m_model, SIGNAL(rowsRemoved(QModelIndex,int,int)), d, SLOT(modelRowsRemoved(QModelIndex,int,int)));
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connect(d->m_model, SIGNAL(columnsInserted(QModelIndex,int,int)), d, SLOT(modelColumnsAdded(QModelIndex,int,int)));
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connect(d->m_model, SIGNAL(columnsRemoved(QModelIndex,int,int)), d, SLOT(modelColumnsRemoved(QModelIndex,int,int)));
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emit modelReplaced();
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}
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QXYSeries* QXYModelMapper::series() const
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{
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Q_D(const QXYModelMapper);
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return d->m_series;
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}
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void QXYModelMapper::setSeries(QXYSeries *series)
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{
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Q_D(QXYModelMapper);
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if (d->m_series) {
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disconnect(d->m_series, 0, d, 0);
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}
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if (series == 0)
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return;
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d->m_series = series;
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d->initializeXYFromModel();
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// connect the signals from the series
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connect(d->m_series, SIGNAL(pointAdded(int)), d, SLOT(handlePointAdded(int)));
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connect(d->m_series, SIGNAL(pointRemoved(int)), d, SLOT(handlePointRemoved(int)));
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connect(d->m_series, SIGNAL(pointReplaced(int)), d, SLOT(handlePointReplaced(int)));
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emit seriesReplaced();
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}
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int QXYModelMapper::first() const
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{
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Q_D(const QXYModelMapper);
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return d->m_first;
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}
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void QXYModelMapper::setFirst(int first)
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{
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Q_D(QXYModelMapper);
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if (first != d->m_first) {
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d->m_first = qMax(first, 0);
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d->initializeXYFromModel();
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emit firstChanged();
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}
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}
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int QXYModelMapper::count() const
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{
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Q_D(const QXYModelMapper);
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return d->m_count;
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}
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void QXYModelMapper::setCount(int count)
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{
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Q_D(QXYModelMapper);
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if (count != d->m_count) {
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d->m_count = qMax(count, -1);
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d->initializeXYFromModel();
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emit countChanged();
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}
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}
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/*!
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Returns the orientation that is used when QXYModelMapper accesses the model.
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This mean whether the consecutive x/y values of the QXYSeries are read from rows (Qt::Horizontal)
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or from columns (Qt::Vertical)
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*/
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Qt::Orientation QXYModelMapper::orientation() const
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{
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Q_D(const QXYModelMapper);
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return d->m_orientation;
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}
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/*!
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Returns the \a orientation that is used when QXYModelMapper accesses the model.
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This mean whether the consecutive x/y values of the QXYSeries are read from rows (Qt::Horizontal)
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or from columns (Qt::Vertical)
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*/
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void QXYModelMapper::setOrientation(Qt::Orientation orientation)
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{
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Q_D(QXYModelMapper);
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d->m_orientation = orientation;
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d->initializeXYFromModel();
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}
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/*!
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Returns which section of the model is kept in sync with the x values of the QXYSeries
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*/
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int QXYModelMapper::xSection() const
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{
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Q_D(const QXYModelMapper);
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return d->m_xSection;
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}
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/*!
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Sets the model section that is kept in sync with the x values of the QXYSeries.
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Parameter \a xSection specifies the section of the model.
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*/
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void QXYModelMapper::setXSection(int xSection)
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{
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Q_D(QXYModelMapper);
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d->m_xSection = qMax(-1, xSection);
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d->initializeXYFromModel();
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}
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/*!
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Returns which section of the model is kept in sync with the y values of the QXYSeries
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*/
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int QXYModelMapper::ySection() const
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{
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Q_D(const QXYModelMapper);
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return d->m_ySection;
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}
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/*!
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Sets the model section that is kept in sync with the y values of the QXYSeries.
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Parameter \a ySection specifies the section of the model.
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*/
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void QXYModelMapper::setYSection(int ySection)
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{
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Q_D(QXYModelMapper);
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d->m_ySection = qMax(-1, ySection);
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d->initializeXYFromModel();
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}
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/*!
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Resets the QXYModelMapper to the default state.
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first: 0; count: -1; xSection: -1; ySection: -1;
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*/
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void QXYModelMapper::reset()
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{
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Q_D(QXYModelMapper);
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d->m_first = 0;
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d->m_count = -1;
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d->m_orientation = Qt::Vertical;
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d->m_xSection = -1;
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d->m_ySection = -1;
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d->initializeXYFromModel();
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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QXYModelMapperPrivate::QXYModelMapperPrivate(QXYModelMapper *q) :
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m_series(0),
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m_model(0),
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m_first(0),
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m_count(-1),
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m_orientation(Qt::Vertical),
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m_xSection(-1),
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m_ySection(-1),
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m_seriesSignalsBlock(false),
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m_modelSignalsBlock(false),
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q_ptr(q)
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{
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}
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void QXYModelMapperPrivate::blockModelSignals(bool block)
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{
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m_modelSignalsBlock = block;
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}
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void QXYModelMapperPrivate::blockSeriesSignals(bool block)
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{
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m_seriesSignalsBlock = block;
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}
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QModelIndex QXYModelMapperPrivate::xModelIndex(int xPos)
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{
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if (m_count != -1 && xPos >= m_count)
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return QModelIndex(); // invalid
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if (m_orientation == Qt::Vertical)
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return m_model->index(xPos + m_first, m_xSection);
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else
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return m_model->index(m_xSection, xPos + m_first);
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}
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QModelIndex QXYModelMapperPrivate::yModelIndex(int yPos)
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{
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if (m_count != -1 && yPos >= m_count)
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return QModelIndex(); // invalid
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if (m_orientation == Qt::Vertical)
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return m_model->index(yPos + m_first, m_ySection);
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else
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return m_model->index(m_ySection, yPos + m_first);
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}
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void QXYModelMapperPrivate::handlePointAdded(int pointPos)
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{
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if (m_seriesSignalsBlock)
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return;
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if (m_count != -1)
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m_count += 1;
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blockModelSignals();
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if (m_orientation == Qt::Vertical)
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m_model->insertRows(pointPos + m_first, 1);
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else
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m_model->insertColumns(pointPos + m_first, 1);
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m_model->setData(xModelIndex(pointPos), m_series->points().at(pointPos).x());
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m_model->setData(yModelIndex(pointPos), m_series->points().at(pointPos).y());
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blockModelSignals(false);
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}
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void QXYModelMapperPrivate::handlePointRemoved(int pointPos)
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{
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if (m_seriesSignalsBlock)
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return;
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if (m_count != -1)
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m_count -= 1;
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blockModelSignals();
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if (m_orientation == Qt::Vertical)
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m_model->removeRow(pointPos + m_first);
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else
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m_model->removeColumn(pointPos + m_first);
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blockModelSignals(false);
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}
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void QXYModelMapperPrivate::handlePointReplaced(int pointPos)
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{
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if (m_seriesSignalsBlock)
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return;
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blockModelSignals();
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m_model->setData(xModelIndex(pointPos), m_series->points().at(pointPos).x());
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m_model->setData(yModelIndex(pointPos), m_series->points().at(pointPos).y());
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blockModelSignals(false);
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}
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void QXYModelMapperPrivate::modelUpdated(QModelIndex topLeft, QModelIndex bottomRight)
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{
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if (m_model == 0 || m_series == 0)
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return;
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if (m_modelSignalsBlock)
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return;
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blockSeriesSignals();
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QModelIndex index;
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QPointF oldPoint;
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QPointF newPoint;
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for (int row = topLeft.row(); row <= bottomRight.row(); row++) {
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for (int column = topLeft.column(); column <= bottomRight.column(); column++) {
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index = topLeft.sibling(row, column);
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if (m_orientation == Qt::Vertical && (index.column() == m_xSection || index.column() == m_ySection)) {
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if (index.row() >= m_first && (m_count == - 1 || index.row() < m_first + m_count)) {
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QModelIndex xIndex = xModelIndex(index.row() - m_first);
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QModelIndex yIndex = yModelIndex(index.row() - m_first);
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if (xIndex.isValid() && yIndex.isValid()) {
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oldPoint = m_series->points().at(index.row() - m_first);
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newPoint.setX(m_model->data(xIndex).toReal());
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newPoint.setY(m_model->data(yIndex).toReal());
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}
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}
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} else if (m_orientation == Qt::Horizontal && (index.row() == m_xSection || index.row() == m_ySection)) {
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if (index.column() >= m_first && (m_count == - 1 || index.column() < m_first + m_count)) {
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QModelIndex xIndex = xModelIndex(index.column() - m_first);
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QModelIndex yIndex = yModelIndex(index.column() - m_first);
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if (xIndex.isValid() && yIndex.isValid()) {
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oldPoint = m_series->points().at(index.column() - m_first);
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newPoint.setX(m_model->data(xIndex).toReal());
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newPoint.setY(m_model->data(yIndex).toReal());
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}
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}
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} else {
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continue;
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}
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m_series->replace(oldPoint, newPoint);
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}
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}
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blockSeriesSignals(false);
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}
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void QXYModelMapperPrivate::modelRowsAdded(QModelIndex parent, int start, int end)
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{
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Q_UNUSED(parent);
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if (m_modelSignalsBlock)
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return;
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blockSeriesSignals();
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if (m_orientation == Qt::Vertical)
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insertData(start, end);
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else if (start <= m_xSection || start <= m_ySection) // if the changes affect the map - reinitialize the xy
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initializeXYFromModel();
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blockSeriesSignals(false);
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}
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void QXYModelMapperPrivate::modelRowsRemoved(QModelIndex parent, int start, int end)
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{
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Q_UNUSED(parent);
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if (m_modelSignalsBlock)
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return;
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blockSeriesSignals();
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if (m_orientation == Qt::Vertical)
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removeData(start, end);
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else if (start <= m_xSection || start <= m_ySection) // if the changes affect the map - reinitialize the xy
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initializeXYFromModel();
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blockSeriesSignals(false);
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}
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void QXYModelMapperPrivate::modelColumnsAdded(QModelIndex parent, int start, int end)
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{
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Q_UNUSED(parent);
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if (m_modelSignalsBlock)
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return;
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blockSeriesSignals();
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if (m_orientation == Qt::Horizontal)
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insertData(start, end);
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else if (start <= m_xSection || start <= m_ySection) // if the changes affect the map - reinitialize the xy
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initializeXYFromModel();
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blockSeriesSignals(false);
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}
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void QXYModelMapperPrivate::modelColumnsRemoved(QModelIndex parent, int start, int end)
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{
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Q_UNUSED(parent);
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if (m_modelSignalsBlock)
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return;
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blockSeriesSignals();
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if (m_orientation == Qt::Horizontal)
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removeData(start, end);
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else if (start <= m_xSection || start <= m_ySection) // if the changes affect the map - reinitialize the xy
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initializeXYFromModel();
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blockSeriesSignals(false);
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}
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void QXYModelMapperPrivate::insertData(int start, int end)
|
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|
{
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|
if (m_model == 0 || m_series == 0)
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|
return;
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|
|
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|
if (m_count != -1 && start >= m_first + m_count) {
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|
return;
|
|
|
} else {
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|
int addedCount = end - start + 1;
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|
|
if (m_count != -1 && addedCount > m_count)
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|
addedCount = m_count;
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|
int first = qMax(start, m_first);
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|
int last = qMin(first + addedCount - 1, m_orientation == Qt::Vertical ? m_model->rowCount() - 1 : m_model->columnCount() - 1);
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|
|
for (int i = first; i <= last; i++) {
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|
|
QPointF point;
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|
|
QModelIndex xIndex = xModelIndex(i - m_first);
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|
|
QModelIndex yIndex = yModelIndex(i - m_first);
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|
|
if (xIndex.isValid() && yIndex.isValid()) {
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|
|
point.setX(m_model->data(xIndex, Qt::DisplayRole).toDouble());
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|
|
point.setY(m_model->data(yIndex, Qt::DisplayRole).toDouble());
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|
|
m_series->insert(i - m_first, point);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
// remove excess of slices (abouve m_count)
|
|
|
if (m_count != -1 && m_series->points().size() > m_count)
|
|
|
for (int i = m_series->points().size() - 1; i >= m_count; i--) {
|
|
|
m_series->remove(m_series->points().at(i));
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
void QXYModelMapperPrivate::removeData(int start, int end)
|
|
|
{
|
|
|
if (m_model == 0 || m_series == 0)
|
|
|
return;
|
|
|
|
|
|
int removedCount = end - start + 1;
|
|
|
if (m_count != -1 && start >= m_first + m_count) {
|
|
|
return;
|
|
|
} else {
|
|
|
int toRemove = qMin(m_series->count(), removedCount); // first find how many items can actually be removed
|
|
|
int first = qMax(start, m_first); // get the index of the first item that will be removed.
|
|
|
int last = qMin(first + toRemove - 1, m_series->count() + m_first - 1); // get the index of the last item that will be removed.
|
|
|
for (int i = last; i >= first; i--) {
|
|
|
m_series->remove(m_series->points().at(i - m_first));
|
|
|
}
|
|
|
|
|
|
if (m_count != -1) {
|
|
|
int itemsAvailable; // check how many are available to be added
|
|
|
if (m_orientation == Qt::Vertical)
|
|
|
itemsAvailable = m_model->rowCount() - m_first - m_series->count();
|
|
|
else
|
|
|
itemsAvailable = m_model->columnCount() - m_first - m_series->count();
|
|
|
int toBeAdded = qMin(itemsAvailable, m_count - m_series->count()); // add not more items than there is space left to be filled.
|
|
|
int currentSize = m_series->count();
|
|
|
if (toBeAdded > 0)
|
|
|
for (int i = m_series->count(); i < currentSize + toBeAdded; i++) {
|
|
|
QPointF point;
|
|
|
QModelIndex xIndex = xModelIndex(i);
|
|
|
QModelIndex yIndex = yModelIndex(i);
|
|
|
if (xIndex.isValid() && yIndex.isValid()) {
|
|
|
point.setX(m_model->data(xIndex, Qt::DisplayRole).toDouble());
|
|
|
point.setY(m_model->data(yIndex, Qt::DisplayRole).toDouble());
|
|
|
m_series->insert(i, point);
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
void QXYModelMapperPrivate::initializeXYFromModel()
|
|
|
{
|
|
|
if (m_model == 0 || m_series == 0)
|
|
|
return;
|
|
|
|
|
|
blockSeriesSignals();
|
|
|
// clear current content
|
|
|
m_series->clear();
|
|
|
|
|
|
// create the initial slices set
|
|
|
int pointPos = 0;
|
|
|
QModelIndex xIndex = xModelIndex(pointPos);
|
|
|
QModelIndex yIndex = yModelIndex(pointPos);
|
|
|
while (xIndex.isValid() && yIndex.isValid()) {
|
|
|
QPointF point;
|
|
|
point.setX(m_model->data(xIndex, Qt::DisplayRole).toDouble());
|
|
|
point.setY(m_model->data(yIndex, Qt::DisplayRole).toDouble());
|
|
|
m_series->append(point);
|
|
|
pointPos++;
|
|
|
xIndex = xModelIndex(pointPos);
|
|
|
yIndex = yModelIndex(pointPos);
|
|
|
}
|
|
|
blockSeriesSignals(false);
|
|
|
}
|
|
|
|
|
|
#include "moc_qxymodelmapper.cpp"
|
|
|
#include "moc_qxymodelmapper_p.cpp"
|
|
|
|
|
|
QTCOMMERCIALCHART_END_NAMESPACE
|
|
|
|
