qxymodelmapper.cpp
533 lines
| 16.0 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 | ||||
** $QT_END_LICENSE$ | ||||
** | ||||
****************************************************************************/ | ||||
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r1164 | #include "qxymodelmapper.h" | ||
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r1256 | #include "qxymodelmapper_p.h" | ||
#include "qxyseries.h" | ||||
#include <QAbstractItemModel> | ||||
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r2107 | #include <QDateTime> | ||
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r1164 | |||
QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||||
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r1347 | /*! | ||
Constructs a mapper object which is a child of \a parent. | ||||
*/ | ||||
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r2131 | QXYModelMapper::QXYModelMapper(QObject *parent) | ||
: QObject(parent), | ||||
d_ptr(new QXYModelMapperPrivate(this)) | ||||
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r1256 | { | ||
} | ||||
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r1507 | /*! | ||
\internal | ||||
*/ | ||||
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r2104 | QAbstractItemModel *QXYModelMapper::model() const | ||
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r1256 | { | ||
Q_D(const QXYModelMapper); | ||||
return d->m_model; | ||||
} | ||||
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r1507 | /*! | ||
\internal | ||||
*/ | ||||
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r1256 | void QXYModelMapper::setModel(QAbstractItemModel *model) | ||
{ | ||||
if (model == 0) | ||||
return; | ||||
Q_D(QXYModelMapper); | ||||
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r2097 | if (d->m_model) | ||
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r1256 | 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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r1656 | connect(d->m_model, SIGNAL(destroyed()), d, SLOT(handleModelDestroyed())); | ||
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r1256 | } | ||
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r1507 | /*! | ||
\internal | ||||
*/ | ||||
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r2104 | QXYSeries *QXYModelMapper::series() const | ||
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r1164 | { | ||
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r1256 | Q_D(const QXYModelMapper); | ||
return d->m_series; | ||||
} | ||||
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r1507 | /*! | ||
\internal | ||||
*/ | ||||
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r1256 | void QXYModelMapper::setSeries(QXYSeries *series) | ||
{ | ||||
Q_D(QXYModelMapper); | ||||
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r2097 | if (d->m_series) | ||
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r1256 | 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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r1656 | connect(d->m_series, SIGNAL(destroyed()), d, SLOT(handleSeriesDestroyed())); | ||
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r1164 | } | ||
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r1507 | /*! | ||
\internal | ||||
*/ | ||||
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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 | } | ||
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r1507 | /*! | ||
\internal | ||||
*/ | ||||
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r1164 | void QXYModelMapper::setFirst(int first) | ||
{ | ||||
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r1256 | Q_D(QXYModelMapper); | ||
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r1507 | d->m_first = qMax(first, 0); | ||
d->initializeXYFromModel(); | ||||
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r1164 | } | ||
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r1507 | /*! | ||
\internal | ||||
*/ | ||||
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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 | } | ||
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r1507 | /*! | ||
\internal | ||||
*/ | ||||
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r1164 | void QXYModelMapper::setCount(int count) | ||
{ | ||||
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r1256 | Q_D(QXYModelMapper); | ||
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r1507 | d->m_count = qMax(count, -1); | ||
d->initializeXYFromModel(); | ||||
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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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r1256 | /////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// | ||
QXYModelMapperPrivate::QXYModelMapperPrivate(QXYModelMapper *q) : | ||||
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r1671 | QObject(q), | ||
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r1256 | 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); | ||||
} | ||||
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r2107 | 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); | ||||
} | ||||
} | ||||
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r1256 | 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); | ||||
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r2107 | setValueToModel(xModelIndex(pointPos), m_series->points().at(pointPos).x()); | ||
setValueToModel(yModelIndex(pointPos), m_series->points().at(pointPos).y()); | ||||
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r1262 | 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(); | ||||
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r2107 | setValueToModel(xModelIndex(pointPos), m_series->points().at(pointPos).x()); | ||
setValueToModel(yModelIndex(pointPos), m_series->points().at(pointPos).y()); | ||||
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r1262 | blockModelSignals(false); | ||
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r1256 | } | ||
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r1656 | void QXYModelMapperPrivate::handleSeriesDestroyed() | ||
{ | ||||
m_series = 0; | ||||
} | ||||
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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); | ||||
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r2107 | newPoint.setX(valueFromModel(xIndex)); | ||
newPoint.setY(valueFromModel(yIndex)); | ||||
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r1317 | } | ||
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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); | ||||
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r2107 | newPoint.setX(valueFromModel(xIndex)); | ||
newPoint.setY(valueFromModel(yIndex)); | ||||
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r1317 | } | ||
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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); | ||||
} | ||||
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r1656 | void QXYModelMapperPrivate::handleModelDestroyed() | ||
{ | ||||
m_model = 0; | ||||
} | ||||
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r1256 | 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()) { | ||||
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r2107 | point.setX(valueFromModel(xIndex)); | ||
point.setY(valueFromModel(yIndex)); | ||||
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r1317 | m_series->insert(i - m_first, point); | ||
} | ||||
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r1256 | } | ||
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r1880 | // remove excess of points (above m_count) | ||
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r1256 | 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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r1256 | int first = qMax(start, m_first); // get the index of the first item that will be removed. | ||
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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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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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r1256 | if (toBeAdded > 0) | ||
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r1294 | for (int i = m_series->count(); i < currentSize + toBeAdded; i++) { | ||
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r1256 | QPointF point; | ||
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r1317 | QModelIndex xIndex = xModelIndex(i); | ||
QModelIndex yIndex = yModelIndex(i); | ||||
if (xIndex.isValid() && yIndex.isValid()) { | ||||
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r2107 | point.setX(valueFromModel(xIndex)); | ||
point.setY(valueFromModel(yIndex)); | ||||
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r1317 | m_series->insert(i, point); | ||
} | ||||
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r1256 | } | ||
} | ||||
} | ||||
} | ||||
void QXYModelMapperPrivate::initializeXYFromModel() | ||||
{ | ||||
if (m_model == 0 || m_series == 0) | ||||
return; | ||||
blockSeriesSignals(); | ||||
// clear current content | ||||
m_series->clear(); | ||||
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r1880 | // create the initial points set | ||
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r1256 | int pointPos = 0; | ||
QModelIndex xIndex = xModelIndex(pointPos); | ||||
QModelIndex yIndex = yModelIndex(pointPos); | ||||
while (xIndex.isValid() && yIndex.isValid()) { | ||||
QPointF point; | ||||
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r2107 | point.setX(valueFromModel(xIndex)); | ||
point.setY(valueFromModel(yIndex)); | ||||
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r1256 | m_series->append(point); | ||
pointPos++; | ||||
xIndex = xModelIndex(pointPos); | ||||
yIndex = yModelIndex(pointPos); | ||||
} | ||||
blockSeriesSignals(false); | ||||
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r1164 | } | ||
#include "moc_qxymodelmapper.cpp" | ||||
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r1256 | #include "moc_qxymodelmapper_p.cpp" | ||
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r1164 | |||
QTCOMMERCIALCHART_END_NAMESPACE | ||||