qxymodelmapper.cpp
558 lines
| 17.3 KiB
| text/x-c
|
CppLexer
Marek Rosa
|
r1355 | /**************************************************************************** | ||
| ** | ||||
| ** Copyright (C) 2012 Digia Plc | ||||
| ** All rights reserved. | ||||
| ** For any questions to Digia, please use contact form at http://qt.digia.com | ||||
| ** | ||||
| ** This file is part of the Qt Commercial Charts Add-on. | ||||
| ** | ||||
| ** $QT_BEGIN_LICENSE$ | ||||
| ** Licensees holding valid Qt Commercial licenses may use this file in | ||||
| ** accordance with the Qt Commercial License Agreement provided with the | ||||
| ** Software or, alternatively, in accordance with the terms contained in | ||||
| ** a written agreement between you and Digia. | ||||
| ** | ||||
| ** If you have questions regarding the use of this file, please use | ||||
| ** contact form at http://qt.digia.com | ||||
| ** $QT_END_LICENSE$ | ||||
| ** | ||||
| ****************************************************************************/ | ||||
|
Marek Rosa
|
r1164 | #include "qxymodelmapper.h" | ||
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r1256 | #include "qxymodelmapper_p.h" | ||
| #include "qxyseries.h" | ||||
| #include <QAbstractItemModel> | ||||
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r1164 | |||
| QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
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r1378 | /*! | ||
| \class QXYModelMapper | ||||
| \brief part of QtCommercial chart API. | ||||
| \mainclass | ||||
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r1397 | Model mappers allow you to use QAbstractItemModel derived models as a data source for a chart series. | ||
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r1378 | 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. | ||
| It is possible to use both QAbstractItemModel and QXYSeries model API. QXYModelMapper makes sure that QXYSeries and the model are kept in sync. | ||||
| NOTE: used model has to support adding/removing rows/columns and modifying the data of the cells. | ||||
| */ | ||||
|
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r1344 | /*! | ||
| \property QXYModelMapper::series | ||||
| \brief Defines the QPieSeries object that is used by the mapper. | ||||
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r1378 | All the data in the series is discarded when it is set to the mapper. | ||
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r1344 | When new series is specified the old series is disconnected (it preserves its data) | ||
| */ | ||||
| /*! | ||||
| \property QXYModelMapper::model | ||||
| \brief Defines the model that is used by the mapper. | ||||
| */ | ||||
| /*! | ||||
| \property QXYModelMapper::first | ||||
| \brief Defines which item of the model's row/column should be mapped as the first x/y pair | ||||
| Minimal and default value is: 0 | ||||
| */ | ||||
| /*! | ||||
| \property QXYModelMapper::count | ||||
| \brief Defines the number of rows/columns of the model that are mapped as the data for QXYSeries | ||||
| Minimal and default value is: -1 (count limited by the number of rows/columns in the model) | ||||
| */ | ||||
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r1477 | /*! | ||
| \fn void QXYModelMapper::seriesReplaced() | ||||
| Emitted when the series to which mapper is connected to has changed. | ||||
| */ | ||||
| /*! | ||||
| \fn void QXYModelMapper::modelReplaced() | ||||
| Emitted when the model to which mapper is connected to has changed. | ||||
| */ | ||||
| /*! | ||||
| \fn void QXYModelMapper::firstChanged() | ||||
| Emitted when the value for the first has changed. | ||||
| */ | ||||
| /*! | ||||
| \fn void QXYModelMapper::countChanged() | ||||
| Emitted when the value for the count has changed. | ||||
| */ | ||||
|
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r1347 | /*! | ||
| Constructs a mapper object which is a child of \a parent. | ||||
| */ | ||||
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r1164 | QXYModelMapper::QXYModelMapper(QObject *parent): | ||
| QObject(parent), | ||||
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r1256 | d_ptr(new QXYModelMapperPrivate(this)) | ||
| { | ||||
| } | ||||
| QAbstractItemModel* QXYModelMapper::model() const | ||||
| { | ||||
| Q_D(const QXYModelMapper); | ||||
| return d->m_model; | ||||
| } | ||||
| 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))); | ||||
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r1477 | |||
| emit modelReplaced(); | ||||
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r1256 | } | ||
| QXYSeries* QXYModelMapper::series() const | ||||
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r1164 | { | ||
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r1256 | Q_D(const QXYModelMapper); | ||
| return d->m_series; | ||||
| } | ||||
| 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))); | ||||
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r1262 | connect(d->m_series, SIGNAL(pointReplaced(int)), d, SLOT(handlePointReplaced(int))); | ||
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r1477 | |||
| emit seriesReplaced(); | ||||
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r1164 | } | ||
| int QXYModelMapper::first() const | ||||
| { | ||||
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r1256 | Q_D(const QXYModelMapper); | ||
| return d->m_first; | ||||
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r1164 | } | ||
| void QXYModelMapper::setFirst(int first) | ||||
| { | ||||
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r1256 | Q_D(QXYModelMapper); | ||
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r1477 | if (first != d->m_first) { | ||
| d->m_first = qMax(first, 0); | ||||
| d->initializeXYFromModel(); | ||||
| emit firstChanged(); | ||||
| } | ||||
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r1164 | } | ||
| int QXYModelMapper::count() const | ||||
| { | ||||
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r1256 | Q_D(const QXYModelMapper); | ||
| return d->m_count; | ||||
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r1164 | } | ||
| void QXYModelMapper::setCount(int count) | ||||
| { | ||||
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r1256 | Q_D(QXYModelMapper); | ||
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r1477 | if (count != d->m_count) { | ||
| d->m_count = qMax(count, -1); | ||||
| d->initializeXYFromModel(); | ||||
| emit countChanged(); | ||||
| } | ||||
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r1164 | } | ||
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r1344 | /*! | ||
| 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) | ||||
| */ | ||||
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r1164 | Qt::Orientation QXYModelMapper::orientation() const | ||
| { | ||||
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r1256 | Q_D(const QXYModelMapper); | ||
| return d->m_orientation; | ||||
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r1164 | } | ||
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r1344 | /*! | ||
| 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) | ||||
| */ | ||||
|
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r1164 | void QXYModelMapper::setOrientation(Qt::Orientation orientation) | ||
| { | ||||
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r1256 | Q_D(QXYModelMapper); | ||
| d->m_orientation = orientation; | ||||
| d->initializeXYFromModel(); | ||||
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r1164 | } | ||
|
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r1344 | /*! | ||
| Returns which section of the model is kept in sync with the x values of the QXYSeries | ||||
| */ | ||||
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r1252 | int QXYModelMapper::xSection() const | ||
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r1164 | { | ||
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r1256 | Q_D(const QXYModelMapper); | ||
| return d->m_xSection; | ||||
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r1164 | } | ||
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r1344 | /*! | ||
| 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. | ||||
| */ | ||||
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r1252 | void QXYModelMapper::setXSection(int xSection) | ||
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r1164 | { | ||
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r1256 | Q_D(QXYModelMapper); | ||
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r1352 | d->m_xSection = qMax(-1, xSection); | ||
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r1256 | d->initializeXYFromModel(); | ||
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r1164 | } | ||
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r1344 | /*! | ||
| Returns which section of the model is kept in sync with the y values of the QXYSeries | ||||
| */ | ||||
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r1252 | int QXYModelMapper::ySection() const | ||
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r1164 | { | ||
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r1256 | Q_D(const QXYModelMapper); | ||
| return d->m_ySection; | ||||
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r1164 | } | ||
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r1344 | /*! | ||
| 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. | ||||
| */ | ||||
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r1252 | void QXYModelMapper::setYSection(int ySection) | ||
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r1164 | { | ||
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r1256 | Q_D(QXYModelMapper); | ||
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r1352 | d->m_ySection = qMax(-1, ySection); | ||
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r1256 | d->initializeXYFromModel(); | ||
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r1164 | } | ||
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r1344 | /*! | ||
| Resets the QXYModelMapper to the default state. | ||||
| first: 0; count: -1; xSection: -1; ySection: -1; | ||||
| */ | ||||
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r1164 | void QXYModelMapper::reset() | ||
| { | ||||
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r1256 | Q_D(QXYModelMapper); | ||
| d->m_first = 0; | ||||
| d->m_count = -1; | ||||
| d->m_orientation = Qt::Vertical; | ||||
| d->m_xSection = -1; | ||||
| d->m_ySection = -1; | ||||
| d->initializeXYFromModel(); | ||||
| } | ||||
| /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// | ||||
| QXYModelMapperPrivate::QXYModelMapperPrivate(QXYModelMapper *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); | ||||
| } | ||||
| void QXYModelMapperPrivate::handlePointAdded(int pointPos) | ||||
| { | ||||
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r1262 | 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); | ||||
| m_model->setData(xModelIndex(pointPos), m_series->points().at(pointPos).x()); | ||||
| m_model->setData(yModelIndex(pointPos), m_series->points().at(pointPos).y()); | ||||
| blockModelSignals(false); | ||||
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r1256 | } | ||
| void QXYModelMapperPrivate::handlePointRemoved(int pointPos) | ||||
| { | ||||
|
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r1262 | 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); | ||||
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r1256 | } | ||
| void QXYModelMapperPrivate::handlePointReplaced(int pointPos) | ||||
| { | ||||
|
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r1262 | if (m_seriesSignalsBlock) | ||
| return; | ||||
| blockModelSignals(); | ||||
| m_model->setData(xModelIndex(pointPos), m_series->points().at(pointPos).x()); | ||||
| m_model->setData(yModelIndex(pointPos), m_series->points().at(pointPos).y()); | ||||
| blockModelSignals(false); | ||||
|
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r1256 | } | ||
| void QXYModelMapperPrivate::modelUpdated(QModelIndex topLeft, QModelIndex bottomRight) | ||||
| { | ||||
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r1278 | if (m_model == 0 || m_series == 0) | ||
| return; | ||||
|
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r1256 | 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); | ||||
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r1317 | if (m_orientation == Qt::Vertical && (index.column() == m_xSection || index.column() == m_ySection)) { | ||
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r1256 | if (index.row() >= m_first && (m_count == - 1 || index.row() < m_first + m_count)) { | ||
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r1317 | 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(m_model->data(xIndex).toReal()); | ||||
| newPoint.setY(m_model->data(yIndex).toReal()); | ||||
| } | ||||
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r1256 | } | ||
| } 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)) { | ||||
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r1317 | 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(m_model->data(xIndex).toReal()); | ||||
| newPoint.setY(m_model->data(yIndex).toReal()); | ||||
| } | ||||
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r1256 | } | ||
| } else { | ||||
| continue; | ||||
| } | ||||
| m_series->replace(oldPoint, newPoint); | ||||
| } | ||||
| } | ||||
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r1295 | blockSeriesSignals(false); | ||
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r1256 | } | ||
| 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::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; | ||||
|
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r1317 | QModelIndex xIndex = xModelIndex(i - m_first); | ||
| QModelIndex yIndex = yModelIndex(i - m_first); | ||||
| 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 - m_first, point); | ||||
| } | ||||
|
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r1256 | } | ||
| // 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 { | ||||
|
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r1294 | int toRemove = qMin(m_series->count(), removedCount); // first find how many items can actually be removed | ||
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Marek Rosa
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r1256 | int first = qMax(start, m_first); // get the index of the first item that will be removed. | ||
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Marek Rosa
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r1294 | int last = qMin(first + toRemove - 1, m_series->count() + m_first - 1); // get the index of the last item that will be removed. | ||
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Marek Rosa
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r1256 | 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) | ||||
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r1294 | itemsAvailable = m_model->rowCount() - m_first - m_series->count(); | ||
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r1256 | else | ||
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r1294 | 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(); | ||||
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Marek Rosa
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r1256 | if (toBeAdded > 0) | ||
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Marek Rosa
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r1294 | for (int i = m_series->count(); i < currentSize + toBeAdded; i++) { | ||
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Marek Rosa
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r1256 | QPointF point; | ||
|
Marek Rosa
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r1317 | 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); | ||||
| } | ||||
|
Marek Rosa
|
r1256 | } | ||
| } | ||||
| } | ||||
| } | ||||
| 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); | ||||
|
Marek Rosa
|
r1164 | } | ||
| #include "moc_qxymodelmapper.cpp" | ||||
|
Marek Rosa
|
r1256 | #include "moc_qxymodelmapper_p.cpp" | ||
|
Marek Rosa
|
r1164 | |||
| QTCOMMERCIALCHART_END_NAMESPACE | ||||