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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 "qpiemodelmapper_p.h"
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#include "qpiemodelmapper.h"
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#include "qpieseries.h"
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#include "qpieslice.h"
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#include <QAbstractItemModel>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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/*!
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\class QPieModelMapper
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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. QHPieModelMapper of QVPieModelMapper should be used instead. This class is used to create a connection between QPieSeries and QAbstractItemModel derived model object.
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It is possible to use both QAbstractItemModel and QPieSeries model API. QPieModelMapper makes sure that Pie 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 QPieModelMapper::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 QPieModelMapper::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 QPieModelMapper::first
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\brief Defines which item of the model's row/column should be mapped as the value/label of the first slice of the pie
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Minimal and default value is: 0
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*/
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/*!
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\property QPieModelMapper::count
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\brief Defines the number of rows/columns of the model that are mapped as the data for the pie.
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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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Constructs a mapper object which is a child of \a parent.
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*/
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QPieModelMapper::QPieModelMapper(QObject *parent) :
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QObject(parent),
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d_ptr(new QPieModelMapperPrivate(this))
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{
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}
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QAbstractItemModel* QPieModelMapper::model() const
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{
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Q_D(const QPieModelMapper);
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return d->m_model;
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}
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void QPieModelMapper::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(QPieModelMapper);
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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->initializePieFromModel();
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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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}
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QPieSeries* QPieModelMapper::series() const
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{
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Q_D(const QPieModelMapper);
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return d->m_series;
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}
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void QPieModelMapper::setSeries(QPieSeries *series)
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{
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Q_D(QPieModelMapper);
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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->initializePieFromModel();
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// connect the signals from the series
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connect(d->m_series, SIGNAL(added(QList<QPieSlice*>)), d, SLOT(slicesAdded(QList<QPieSlice*>)));
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connect(d->m_series, SIGNAL(removed(QList<QPieSlice*>)), d, SLOT(slicesRemoved(QList<QPieSlice*>)));
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}
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int QPieModelMapper::first() const
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{
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Q_D(const QPieModelMapper);
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return d->m_first;
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}
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void QPieModelMapper::setFirst(int first)
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{
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Q_D(QPieModelMapper);
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d->m_first = qMax(first, 0);
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d->initializePieFromModel();
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}
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int QPieModelMapper::count() const
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{
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Q_D(const QPieModelMapper);
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return d->m_count;
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}
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void QPieModelMapper::setCount(int count)
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{
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Q_D(QPieModelMapper);
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d->m_count = qMax(count, -1);
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d->initializePieFromModel();
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}
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/*!
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Returns the orientation that is used when QPieModelMapper accesses the model.
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This mean whether the consecutive values/labels of the pie are read from row (Qt::Horizontal)
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or from columns (Qt::Vertical)
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*/
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Qt::Orientation QPieModelMapper::orientation() const
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{
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Q_D(const QPieModelMapper);
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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 QPieModelMapper accesses the model.
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This mean whether the consecutive values/labels of the pie are read from row (Qt::Horizontal)
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or from columns (Qt::Vertical)
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*/
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void QPieModelMapper::setOrientation(Qt::Orientation orientation)
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{
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Q_D(QPieModelMapper);
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d->m_orientation = orientation;
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d->initializePieFromModel();
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}
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/*!
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Returns which section of the model is kept in sync with the values of the pie's slices
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*/
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int QPieModelMapper::valuesSection() const
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{
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Q_D(const QPieModelMapper);
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return d->m_valuesSection;
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}
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/*!
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Sets the model section that is kept in sync with the pie slices values.
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Parameter \a valuesSection specifies the section of the model.
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*/
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void QPieModelMapper::setValuesSection(int valuesSection)
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{
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Q_D(QPieModelMapper);
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d->m_valuesSection = qMax(-1, valuesSection);
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d->initializePieFromModel();
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}
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/*!
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Returns which section of the model is kept in sync with the labels of the pie's slices
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*/
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int QPieModelMapper::labelsSection() const
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{
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Q_D(const QPieModelMapper);
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return d->m_labelsSection;
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}
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/*!
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Sets the model section that is kept in sync with the pie slices labels.
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Parameter \a labelsSection specifies the section of the model.
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*/
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void QPieModelMapper::setLabelsSection(int labelsSection)
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{
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Q_D(QPieModelMapper);
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d->m_labelsSection = qMax(-1, labelsSection);
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d->initializePieFromModel();
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}
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/*!
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Resets the QPieModelMapper to the default state.
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first: 0; count: -1; valuesSection: -1; labelsSection: -1;
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*/
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void QPieModelMapper::reset()
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{
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Q_D(QPieModelMapper);
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d->m_first = 0;
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d->m_count = -1;
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d->m_valuesSection = -1;
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d->m_labelsSection = -1;
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}
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///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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QPieModelMapperPrivate::QPieModelMapperPrivate(QPieModelMapper *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_valuesSection(-1),
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m_labelsSection(-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 QPieModelMapperPrivate::blockModelSignals(bool block)
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{
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m_modelSignalsBlock = block;
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}
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void QPieModelMapperPrivate::blockSeriesSignals(bool block)
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{
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m_seriesSignalsBlock = block;
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}
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QPieSlice* QPieModelMapperPrivate::pieSlice(QModelIndex index) const
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{
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if (!index.isValid())
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return 0; // index is invalid
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if (m_orientation == Qt::Vertical && (index.column() == m_valuesSection || index.column() == m_labelsSection)) {
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if (index.row() >= m_first && (m_count == - 1 || index.row() < m_first + m_count)) {
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if (m_model->index(index.row(), m_valuesSection).isValid() && m_model->index(index.row(), m_labelsSection).isValid())
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return m_series->slices().at(index.row() - m_first);
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else
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return 0;
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}
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} else if (m_orientation == Qt::Horizontal && (index.row() == m_valuesSection || index.row() == m_labelsSection)) {
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if (index.column() >= m_first && (m_count == - 1 || index.column() < m_first + m_count)) {
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if (m_model->index(m_valuesSection, index.column()).isValid() && m_model->index(m_labelsSection, index.column()).isValid())
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return m_series->slices().at(index.column() - m_first);
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else
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return 0;
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}
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}
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return 0; // This part of model has not been mapped to any slice
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}
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QModelIndex QPieModelMapperPrivate::valueModelIndex(int slicePos)
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{
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if (m_count != -1 && slicePos >= 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(slicePos + m_first, m_valuesSection);
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else
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return m_model->index(m_valuesSection, slicePos + m_first);
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}
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QModelIndex QPieModelMapperPrivate::labelModelIndex(int slicePos)
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{
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if (m_count != -1 && slicePos >= 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(slicePos + m_first, m_labelsSection);
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else
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return m_model->index(m_labelsSection, slicePos + m_first);
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}
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bool QPieModelMapperPrivate::isLabelIndex(QModelIndex index) const
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{
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if (m_orientation == Qt::Vertical && index.column() == m_labelsSection)
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return true;
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else if (m_orientation == Qt::Horizontal && index.row() == m_labelsSection)
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return true;
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return false;
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}
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bool QPieModelMapperPrivate::isValueIndex(QModelIndex index) const
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{
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if (m_orientation == Qt::Vertical && index.column() == m_valuesSection)
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return true;
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else if (m_orientation == Qt::Horizontal && index.row() == m_valuesSection)
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return true;
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return false;
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}
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void QPieModelMapperPrivate::slicesAdded(QList<QPieSlice*> slices)
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{
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if (m_seriesSignalsBlock)
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return;
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if (slices.count() == 0)
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return;
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int firstIndex = m_series->slices().indexOf(slices.at(0));
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if (firstIndex == -1)
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return;
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if (m_count != -1)
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m_count += slices.count();
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for (int i = firstIndex; i < firstIndex + slices.count(); i++) {
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m_slices.insert(i, slices.at(i - firstIndex));
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connect(slices.at(i - firstIndex), SIGNAL(labelChanged()), this, SLOT(sliceLabelChanged()));
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connect(slices.at(i - firstIndex), SIGNAL(valueChanged()), this, SLOT(sliceValueChanged()));
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}
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blockModelSignals();
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if (m_orientation == Qt::Vertical)
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m_model->insertRows(firstIndex + m_first, slices.count());
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else
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m_model->insertColumns(firstIndex + m_first, slices.count());
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for(int i = firstIndex; i < firstIndex + slices.count(); i++) {
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m_model->setData(valueModelIndex(i), slices.at(i - firstIndex)->value());
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m_model->setData(labelModelIndex(i), slices.at(i - firstIndex)->label());
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}
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blockModelSignals(false);
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}
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void QPieModelMapperPrivate::slicesRemoved(QList<QPieSlice*> slices)
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{
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if (m_seriesSignalsBlock)
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return;
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if (slices.count() == 0)
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return;
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int firstIndex = m_slices.indexOf(slices.at(0));
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if (firstIndex == -1)
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return;
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if (m_count != -1)
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m_count -= slices.count();
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for (int i = firstIndex + slices.count() - 1; i >= firstIndex; i--)
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m_slices.removeAt(i);
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blockModelSignals();
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if (m_orientation == Qt::Vertical)
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m_model->removeRows(firstIndex + m_first, slices.count());
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else
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m_model->removeColumns(firstIndex + m_first, slices.count());
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blockModelSignals(false);
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}
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void QPieModelMapperPrivate::sliceLabelChanged()
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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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QPieSlice *slice = qobject_cast<QPieSlice *>(QObject::sender());
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m_model->setData(labelModelIndex(m_series->slices().indexOf(slice)), slice->label());
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blockModelSignals(false);
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}
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void QPieModelMapperPrivate::sliceValueChanged()
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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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QPieSlice *slice = qobject_cast<QPieSlice *>(QObject::sender());
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m_model->setData(valueModelIndex(m_series->slices().indexOf(slice)), slice->value());
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blockModelSignals(false);
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}
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void QPieModelMapperPrivate::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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QPieSlice *slice;
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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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slice = pieSlice(index);
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if (slice) {
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if (isValueIndex(index))
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slice->setValue(m_model->data(index, Qt::DisplayRole).toReal());
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if (isLabelIndex(index))
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slice->setLabel(m_model->data(index, Qt::DisplayRole).toString());
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}
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}
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}
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blockSeriesSignals(false);
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}
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void QPieModelMapperPrivate::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_valuesSection || start <= m_labelsSection) // if the changes affect the map - reinitialize the pie
|
|
|
initializePieFromModel();
|
|
|
blockSeriesSignals(false);
|
|
|
}
|
|
|
|
|
|
void QPieModelMapperPrivate::modelRowsRemoved(QModelIndex parent, int start, int end)
|
|
|
{
|
|
|
Q_UNUSED(parent);
|
|
|
if (m_modelSignalsBlock)
|
|
|
return;
|
|
|
|
|
|
blockSeriesSignals();
|
|
|
if (m_orientation == Qt::Vertical)
|
|
|
removeData(start, end);
|
|
|
else if (start <= m_valuesSection || start <= m_labelsSection) // if the changes affect the map - reinitialize the pie
|
|
|
initializePieFromModel();
|
|
|
blockSeriesSignals(false);
|
|
|
}
|
|
|
|
|
|
void QPieModelMapperPrivate::modelColumnsAdded(QModelIndex parent, int start, int end)
|
|
|
{
|
|
|
Q_UNUSED(parent);
|
|
|
if (m_modelSignalsBlock)
|
|
|
return;
|
|
|
|
|
|
blockSeriesSignals();
|
|
|
if (m_orientation == Qt::Horizontal)
|
|
|
insertData(start, end);
|
|
|
else if (start <= m_valuesSection || start <= m_labelsSection) // if the changes affect the map - reinitialize the pie
|
|
|
initializePieFromModel();
|
|
|
blockSeriesSignals(false);
|
|
|
}
|
|
|
|
|
|
void QPieModelMapperPrivate::modelColumnsRemoved(QModelIndex parent, int start, int end)
|
|
|
{
|
|
|
Q_UNUSED(parent);
|
|
|
if (m_modelSignalsBlock)
|
|
|
return;
|
|
|
|
|
|
blockSeriesSignals();
|
|
|
if (m_orientation == Qt::Horizontal)
|
|
|
removeData(start, end);
|
|
|
else if (start <= m_valuesSection || start <= m_labelsSection) // if the changes affect the map - reinitialize the pie
|
|
|
initializePieFromModel();
|
|
|
blockSeriesSignals(false);
|
|
|
}
|
|
|
|
|
|
void QPieModelMapperPrivate::insertData(int start, int end)
|
|
|
{
|
|
|
if (m_model == 0 || m_series == 0)
|
|
|
return;
|
|
|
|
|
|
if (m_count != -1 && start >= m_first + m_count) {
|
|
|
return;
|
|
|
} else {
|
|
|
int addedCount = end - start + 1;
|
|
|
if (m_count != -1 && addedCount > m_count)
|
|
|
addedCount = m_count;
|
|
|
int first = qMax(start, m_first);
|
|
|
int last = qMin(first + addedCount - 1, m_orientation == Qt::Vertical ? m_model->rowCount() - 1 : m_model->columnCount() - 1);
|
|
|
for (int i = first; i <= last; i++) {
|
|
|
QModelIndex valueIndex = valueModelIndex(i - m_first);
|
|
|
QModelIndex labelIndex = labelModelIndex(i - m_first);
|
|
|
if (valueIndex.isValid() && labelIndex.isValid()) {
|
|
|
QPieSlice *slice = new QPieSlice;
|
|
|
slice->setValue(m_model->data(valueIndex, Qt::DisplayRole).toDouble());
|
|
|
slice->setLabel(m_model->data(labelIndex, Qt::DisplayRole).toString());
|
|
|
connect(slice, SIGNAL(labelChanged()), this, SLOT(sliceLabelChanged()));
|
|
|
connect(slice, SIGNAL(valueChanged()), this, SLOT(sliceValueChanged()));
|
|
|
m_series->insert(i - m_first, slice);
|
|
|
m_slices.insert(i - m_first, slice);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
// remove excess of slices (abouve m_count)
|
|
|
if (m_count != -1 && m_series->slices().size() > m_count)
|
|
|
for (int i = m_series->slices().size() - 1; i >= m_count; i--) {
|
|
|
m_series->remove(m_series->slices().at(i));
|
|
|
m_slices.removeAt(i);
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
void QPieModelMapperPrivate::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->slices().size(), 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->slices().size() + 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->slices().at(i - m_first));
|
|
|
m_slices.removeAt(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->slices().size();
|
|
|
else
|
|
|
itemsAvailable = m_model->columnCount() - m_first - m_series->slices().size();
|
|
|
int toBeAdded = qMin(itemsAvailable, m_count - m_series->slices().size()); // add not more items than there is space left to be filled.
|
|
|
int currentSize = m_series->slices().size();
|
|
|
if (toBeAdded > 0)
|
|
|
for (int i = m_series->slices().size(); i < currentSize + toBeAdded; i++) {
|
|
|
QModelIndex valueIndex = valueModelIndex(i - m_first);
|
|
|
QModelIndex labelIndex = labelModelIndex(i - m_first);
|
|
|
if (valueIndex.isValid() && labelIndex.isValid()) {
|
|
|
QPieSlice *slice = new QPieSlice;
|
|
|
slice->setValue(m_model->data(valueIndex, Qt::DisplayRole).toDouble());
|
|
|
slice->setLabel(m_model->data(labelIndex, Qt::DisplayRole).toString());
|
|
|
m_series->insert(i, slice);
|
|
|
m_slices.insert(i, slice);
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
void QPieModelMapperPrivate::initializePieFromModel()
|
|
|
{
|
|
|
if (m_model == 0 || m_series == 0)
|
|
|
return;
|
|
|
|
|
|
blockSeriesSignals();
|
|
|
// clear current content
|
|
|
m_series->clear();
|
|
|
m_slices.clear();
|
|
|
|
|
|
// create the initial slices set
|
|
|
int slicePos = 0;
|
|
|
QModelIndex valueIndex = valueModelIndex(slicePos);
|
|
|
QModelIndex labelIndex = labelModelIndex(slicePos);
|
|
|
while (valueIndex.isValid() && labelIndex.isValid()) {
|
|
|
QPieSlice *slice = new QPieSlice;
|
|
|
slice->setLabel(m_model->data(labelIndex, Qt::DisplayRole).toString());
|
|
|
slice->setValue(m_model->data(valueIndex, Qt::DisplayRole).toDouble());
|
|
|
connect(slice, SIGNAL(labelChanged()), this, SLOT(sliceLabelChanged()));
|
|
|
connect(slice, SIGNAL(valueChanged()), this, SLOT(sliceValueChanged()));
|
|
|
m_series->append(slice);
|
|
|
m_slices.append(slice);
|
|
|
slicePos++;
|
|
|
valueIndex = valueModelIndex(slicePos);
|
|
|
labelIndex = labelModelIndex(slicePos);
|
|
|
}
|
|
|
blockSeriesSignals(false);
|
|
|
}
|
|
|
|
|
|
#include "moc_qpiemodelmapper_p.cpp"
|
|
|
#include "moc_qpiemodelmapper.cpp"
|
|
|
|
|
|
QTCOMMERCIALCHART_END_NAMESPACE
|
|
|
|
