| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** This file is part of the Qt Charts module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:GPL$ |
| ** Commercial License Usage |
| ** Licensees holding valid commercial Qt licenses may use this file in |
| ** accordance with the commercial license agreement provided with the |
| ** Software or, alternatively, in accordance with the terms contained in |
| ** a written agreement between you and The Qt Company. For licensing terms |
| ** and conditions see https://www.qt.io/terms-conditions. For further |
| ** information use the contact form at https://www.qt.io/contact-us. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 3 or (at your option) any later version |
| ** approved by the KDE Free Qt Foundation. The licenses are as published by |
| ** the Free Software Foundation and appearing in the file LICENSE.GPL3 |
| ** included in the packaging of this file. Please review the following |
| ** information to ensure the GNU General Public License requirements will |
| ** be met: https://www.gnu.org/licenses/gpl-3.0.html. |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include <QtCharts/QXYModelMapper> |
| #include <private/qxymodelmapper_p.h> |
| #include <QtCharts/QXYSeries> |
| #include <QtCore/QAbstractItemModel> |
| #include <QtCore/QDateTime> |
| #include <QtCore/QDebug> |
| |
| QT_CHARTS_BEGIN_NAMESPACE |
| |
| /*! |
| Constructs a mapper object which is a child of \a parent. |
| */ |
| QXYModelMapper::QXYModelMapper(QObject *parent) |
| : QObject(parent), |
| d_ptr(new QXYModelMapperPrivate(this)) |
| { |
| } |
| |
| /*! |
| \internal |
| */ |
| QAbstractItemModel *QXYModelMapper::model() const |
| { |
| Q_D(const QXYModelMapper); |
| return d->m_model; |
| } |
| |
| /*! |
| \internal |
| */ |
| void QXYModelMapper::setModel(QAbstractItemModel *model) |
| { |
| if (model == 0) |
| return; |
| |
| Q_D(QXYModelMapper); |
| if (d->m_model) |
| disconnect(d->m_model, 0, d, 0); |
| |
| d->m_model = model; |
| d->initializeXYFromModel(); |
| // connect signals from the model |
| connect(d->m_model, SIGNAL(dataChanged(QModelIndex,QModelIndex)), d, SLOT(modelUpdated(QModelIndex,QModelIndex))); |
| connect(d->m_model, SIGNAL(rowsInserted(QModelIndex,int,int)), d, SLOT(modelRowsAdded(QModelIndex,int,int))); |
| connect(d->m_model, SIGNAL(rowsRemoved(QModelIndex,int,int)), d, SLOT(modelRowsRemoved(QModelIndex,int,int))); |
| connect(d->m_model, SIGNAL(columnsInserted(QModelIndex,int,int)), d, SLOT(modelColumnsAdded(QModelIndex,int,int))); |
| connect(d->m_model, SIGNAL(columnsRemoved(QModelIndex,int,int)), d, SLOT(modelColumnsRemoved(QModelIndex,int,int))); |
| connect(d->m_model, SIGNAL(modelReset()), d, SLOT(initializeXYFromModel())); |
| connect(d->m_model, SIGNAL(layoutChanged()), d, SLOT(initializeXYFromModel())); |
| connect(d->m_model, SIGNAL(destroyed()), d, SLOT(handleModelDestroyed())); |
| } |
| |
| /*! |
| \internal |
| */ |
| QXYSeries *QXYModelMapper::series() const |
| { |
| Q_D(const QXYModelMapper); |
| return d->m_series; |
| } |
| |
| /*! |
| \internal |
| */ |
| void QXYModelMapper::setSeries(QXYSeries *series) |
| { |
| Q_D(QXYModelMapper); |
| if (d->m_series) |
| disconnect(d->m_series, 0, d, 0); |
| |
| if (series == 0) |
| return; |
| |
| d->m_series = series; |
| d->initializeXYFromModel(); |
| // connect the signals from the series |
| connect(d->m_series, SIGNAL(pointAdded(int)), d, SLOT(handlePointAdded(int))); |
| connect(d->m_series, SIGNAL(pointRemoved(int)), d, SLOT(handlePointRemoved(int))); |
| connect(d->m_series, SIGNAL(pointReplaced(int)), d, SLOT(handlePointReplaced(int))); |
| connect(d->m_series, SIGNAL(destroyed()), d, SLOT(handleSeriesDestroyed())); |
| connect(d->m_series, SIGNAL(pointsRemoved(int,int)), d, SLOT(handlePointsRemoved(int,int))); |
| } |
| |
| /*! |
| \internal |
| */ |
| int QXYModelMapper::first() const |
| { |
| Q_D(const QXYModelMapper); |
| return d->m_first; |
| } |
| |
| /*! |
| \internal |
| */ |
| void QXYModelMapper::setFirst(int first) |
| { |
| Q_D(QXYModelMapper); |
| d->m_first = qMax(first, 0); |
| d->initializeXYFromModel(); |
| } |
| |
| /*! |
| \internal |
| */ |
| int QXYModelMapper::count() const |
| { |
| Q_D(const QXYModelMapper); |
| return d->m_count; |
| } |
| |
| /*! |
| \internal |
| */ |
| void QXYModelMapper::setCount(int count) |
| { |
| Q_D(QXYModelMapper); |
| d->m_count = qMax(count, -1); |
| d->initializeXYFromModel(); |
| } |
| |
| /*! |
| Returns the orientation that is used when QXYModelMapper accesses the model. |
| This mean whether the consecutive x/y values of the QXYSeries are read from rows (Qt::Horizontal) |
| or from columns (Qt::Vertical) |
| */ |
| Qt::Orientation QXYModelMapper::orientation() const |
| { |
| Q_D(const QXYModelMapper); |
| return d->m_orientation; |
| } |
| |
| /*! |
| Returns the \a orientation that is used when QXYModelMapper accesses the model. |
| This mean whether the consecutive x/y values of the QXYSeries are read from rows (Qt::Horizontal) |
| or from columns (Qt::Vertical) |
| */ |
| void QXYModelMapper::setOrientation(Qt::Orientation orientation) |
| { |
| Q_D(QXYModelMapper); |
| d->m_orientation = orientation; |
| d->initializeXYFromModel(); |
| } |
| |
| /*! |
| Returns which section of the model is kept in sync with the x values of the QXYSeries |
| */ |
| int QXYModelMapper::xSection() const |
| { |
| Q_D(const QXYModelMapper); |
| return d->m_xSection; |
| } |
| |
| /*! |
| Sets the model section that is kept in sync with the x values of the QXYSeries. |
| Parameter \a xSection specifies the section of the model. |
| */ |
| void QXYModelMapper::setXSection(int xSection) |
| { |
| Q_D(QXYModelMapper); |
| d->m_xSection = qMax(-1, xSection); |
| d->initializeXYFromModel(); |
| } |
| |
| /*! |
| Returns which section of the model is kept in sync with the y values of the QXYSeries |
| */ |
| int QXYModelMapper::ySection() const |
| { |
| Q_D(const QXYModelMapper); |
| return d->m_ySection; |
| } |
| |
| /*! |
| Sets the model section that is kept in sync with the y values of the QXYSeries. |
| Parameter \a ySection specifies the section of the model. |
| */ |
| void QXYModelMapper::setYSection(int ySection) |
| { |
| Q_D(QXYModelMapper); |
| d->m_ySection = qMax(-1, ySection); |
| d->initializeXYFromModel(); |
| } |
| |
| /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// |
| |
| QXYModelMapperPrivate::QXYModelMapperPrivate(QXYModelMapper *q) : |
| QObject(q), |
| m_series(0), |
| m_model(0), |
| m_first(0), |
| m_count(-1), |
| m_orientation(Qt::Vertical), |
| m_xSection(-1), |
| m_ySection(-1), |
| m_seriesSignalsBlock(false), |
| m_modelSignalsBlock(false), |
| q_ptr(q) |
| { |
| } |
| |
| void QXYModelMapperPrivate::blockModelSignals(bool block) |
| { |
| m_modelSignalsBlock = block; |
| } |
| |
| void QXYModelMapperPrivate::blockSeriesSignals(bool block) |
| { |
| m_seriesSignalsBlock = block; |
| } |
| |
| QModelIndex QXYModelMapperPrivate::xModelIndex(int xPos) |
| { |
| if (m_count != -1 && xPos >= m_count) |
| return QModelIndex(); // invalid |
| |
| if (m_orientation == Qt::Vertical) |
| return m_model->index(xPos + m_first, m_xSection); |
| else |
| return m_model->index(m_xSection, xPos + m_first); |
| } |
| |
| QModelIndex QXYModelMapperPrivate::yModelIndex(int yPos) |
| { |
| if (m_count != -1 && yPos >= m_count) |
| return QModelIndex(); // invalid |
| |
| if (m_orientation == Qt::Vertical) |
| return m_model->index(yPos + m_first, m_ySection); |
| else |
| return m_model->index(m_ySection, yPos + m_first); |
| } |
| |
| qreal QXYModelMapperPrivate::valueFromModel(QModelIndex index) |
| { |
| QVariant value = m_model->data(index, Qt::DisplayRole); |
| switch (value.type()) { |
| case QVariant::DateTime: |
| return value.toDateTime().toMSecsSinceEpoch(); |
| case QVariant::Date: |
| return QDateTime(value.toDate()).toMSecsSinceEpoch(); |
| default: |
| return value.toReal(); |
| } |
| } |
| |
| void QXYModelMapperPrivate::setValueToModel(QModelIndex index, qreal value) |
| { |
| QVariant oldValue = m_model->data(index, Qt::DisplayRole); |
| switch (oldValue.type()) { |
| case QVariant::DateTime: |
| m_model->setData(index, QDateTime::fromMSecsSinceEpoch(value)); |
| break; |
| case QVariant::Date: |
| m_model->setData(index, QDateTime::fromMSecsSinceEpoch(value).date()); |
| break; |
| default: |
| m_model->setData(index, value); |
| } |
| } |
| |
| void QXYModelMapperPrivate::handlePointAdded(int pointPos) |
| { |
| if (m_seriesSignalsBlock) |
| return; |
| |
| if (m_count != -1) |
| m_count += 1; |
| |
| blockModelSignals(); |
| if (m_orientation == Qt::Vertical) |
| m_model->insertRows(pointPos + m_first, 1); |
| else |
| m_model->insertColumns(pointPos + m_first, 1); |
| |
| setValueToModel(xModelIndex(pointPos), m_series->points().at(pointPos).x()); |
| setValueToModel(yModelIndex(pointPos), m_series->points().at(pointPos).y()); |
| blockModelSignals(false); |
| } |
| |
| void QXYModelMapperPrivate::handlePointRemoved(int pointPos) |
| { |
| if (m_seriesSignalsBlock) |
| return; |
| |
| if (m_count != -1) |
| m_count -= 1; |
| |
| blockModelSignals(); |
| if (m_orientation == Qt::Vertical) |
| m_model->removeRow(pointPos + m_first); |
| else |
| m_model->removeColumn(pointPos + m_first); |
| blockModelSignals(false); |
| } |
| |
| void QXYModelMapperPrivate::handlePointsRemoved(int pointPos, int count) |
| { |
| if (m_seriesSignalsBlock) |
| return; |
| |
| m_count -= count; |
| |
| if (m_count < -1) |
| m_count = -1; |
| |
| blockModelSignals(); |
| if (m_orientation == Qt::Vertical) |
| m_model->removeRows(pointPos + m_first, count); |
| else |
| m_model->removeColumns(pointPos + m_first, count); |
| blockModelSignals(false); |
| } |
| |
| void QXYModelMapperPrivate::handlePointReplaced(int pointPos) |
| { |
| if (m_seriesSignalsBlock) |
| return; |
| |
| blockModelSignals(); |
| setValueToModel(xModelIndex(pointPos), m_series->points().at(pointPos).x()); |
| setValueToModel(yModelIndex(pointPos), m_series->points().at(pointPos).y()); |
| blockModelSignals(false); |
| } |
| |
| void QXYModelMapperPrivate::handleSeriesDestroyed() |
| { |
| m_series = 0; |
| } |
| |
| void QXYModelMapperPrivate::modelUpdated(QModelIndex topLeft, QModelIndex bottomRight) |
| { |
| if (m_model == 0 || m_series == 0) |
| return; |
| |
| if (m_modelSignalsBlock) |
| return; |
| |
| blockSeriesSignals(); |
| QModelIndex index; |
| QPointF oldPoint; |
| QPointF newPoint; |
| for (int row = topLeft.row(); row <= bottomRight.row(); row++) { |
| for (int column = topLeft.column(); column <= bottomRight.column(); column++) { |
| index = topLeft.sibling(row, column); |
| if (m_orientation == Qt::Vertical && (index.column() == m_xSection || index.column() == m_ySection)) { |
| if (index.row() >= m_first && (m_count == - 1 || index.row() < m_first + m_count)) { |
| QModelIndex xIndex = xModelIndex(index.row() - m_first); |
| QModelIndex yIndex = yModelIndex(index.row() - m_first); |
| if (xIndex.isValid() && yIndex.isValid()) { |
| oldPoint = m_series->points().at(index.row() - m_first); |
| newPoint.setX(valueFromModel(xIndex)); |
| newPoint.setY(valueFromModel(yIndex)); |
| m_series->replace(index.row() - m_first, newPoint); |
| } |
| } |
| } else if (m_orientation == Qt::Horizontal && (index.row() == m_xSection || index.row() == m_ySection)) { |
| if (index.column() >= m_first && (m_count == - 1 || index.column() < m_first + m_count)) { |
| QModelIndex xIndex = xModelIndex(index.column() - m_first); |
| QModelIndex yIndex = yModelIndex(index.column() - m_first); |
| if (xIndex.isValid() && yIndex.isValid()) { |
| oldPoint = m_series->points().at(index.column() - m_first); |
| newPoint.setX(valueFromModel(xIndex)); |
| newPoint.setY(valueFromModel(yIndex)); |
| m_series->replace(index.column() - m_first, newPoint); |
| } |
| } |
| } |
| } |
| } |
| blockSeriesSignals(false); |
| } |
| |
| void QXYModelMapperPrivate::modelRowsAdded(QModelIndex parent, int start, int end) |
| { |
| Q_UNUSED(parent); |
| if (m_modelSignalsBlock) |
| return; |
| |
| blockSeriesSignals(); |
| if (m_orientation == Qt::Vertical) |
| insertData(start, end); |
| else if (start <= m_xSection || start <= m_ySection) // if the changes affect the map - reinitialize the xy |
| initializeXYFromModel(); |
| blockSeriesSignals(false); |
| } |
| |
| void QXYModelMapperPrivate::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_xSection || start <= m_ySection) // if the changes affect the map - reinitialize the xy |
| initializeXYFromModel(); |
| blockSeriesSignals(false); |
| } |
| |
| void QXYModelMapperPrivate::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_xSection || start <= m_ySection) // if the changes affect the map - reinitialize the xy |
| initializeXYFromModel(); |
| blockSeriesSignals(false); |
| } |
| |
| void QXYModelMapperPrivate::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_xSection || start <= m_ySection) // if the changes affect the map - reinitialize the xy |
| initializeXYFromModel(); |
| blockSeriesSignals(false); |
| } |
| |
| void QXYModelMapperPrivate::handleModelDestroyed() |
| { |
| m_model = 0; |
| } |
| |
| void QXYModelMapperPrivate::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++) { |
| QPointF point; |
| QModelIndex xIndex = xModelIndex(i - m_first); |
| QModelIndex yIndex = yModelIndex(i - m_first); |
| if (xIndex.isValid() && yIndex.isValid()) { |
| point.setX(valueFromModel(xIndex)); |
| point.setY(valueFromModel(yIndex)); |
| m_series->insert(i - m_first, point); |
| } |
| } |
| |
| // remove excess of points (above 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(valueFromModel(xIndex)); |
| point.setY(valueFromModel(yIndex)); |
| 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 points set |
| int pointPos = 0; |
| QModelIndex xIndex = xModelIndex(pointPos); |
| QModelIndex yIndex = yModelIndex(pointPos); |
| |
| if (xIndex.isValid() && yIndex.isValid()) { |
| while (xIndex.isValid() && yIndex.isValid()) { |
| QPointF point; |
| point.setX(valueFromModel(xIndex)); |
| point.setY(valueFromModel(yIndex)); |
| m_series->append(point); |
| pointPos++; |
| xIndex = xModelIndex(pointPos); |
| yIndex = yModelIndex(pointPos); |
| // Don't warn about invalid index after the first, those are valid and used to |
| // determine when we should end looping. |
| } |
| } else { |
| // Invalid index right off the bat means series will be left empty, so output a warning, |
| // unless model is also empty |
| int count = m_orientation == Qt::Vertical ? m_model->rowCount() : m_model->columnCount(); |
| if (count > 0) { |
| if (!xIndex.isValid()) |
| qWarning() << __FUNCTION__ << QStringLiteral("Invalid X coordinate index in model mapper."); |
| else if (!yIndex.isValid()) |
| qWarning() << __FUNCTION__ << QStringLiteral("Invalid Y coordinate index in model mapper."); |
| } |
| } |
| |
| blockSeriesSignals(false); |
| } |
| |
| QT_CHARTS_END_NAMESPACE |
| |
| #include "moc_qxymodelmapper.cpp" |
| #include "moc_qxymodelmapper_p.cpp" |