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/****************************************************************************
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**
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** Copyright (C) 2013 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 "chartpresenter_p.h"
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#include "qchart.h"
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#include "chartitem_p.h"
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#include "qchart_p.h"
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#include "qabstractaxis.h"
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#include "qabstractaxis_p.h"
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#include "chartdataset_p.h"
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#include "chartanimation_p.h"
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#include "qabstractseries_p.h"
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#include "qareaseries.h"
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#include "chartaxiselement_p.h"
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#include "chartbackground_p.h"
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#include "cartesianchartlayout_p.h"
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#include "polarchartlayout_p.h"
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#include "charttitle_p.h"
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#include <QTimer>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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static QGraphicsTextItem *dummyTextItem = 0;
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static const char *truncateMatchString = "&#?[0-9a-zA-Z]*;$";
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static QRegExp *truncateMatcher = 0;
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class StaticDummyTextDeleter
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{
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public:
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StaticDummyTextDeleter() {}
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~StaticDummyTextDeleter()
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{
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delete dummyTextItem;
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delete truncateMatcher;
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}
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};
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StaticDummyTextDeleter staticDummyTextDeleter;
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ChartPresenter::ChartPresenter(QChart *chart, QChart::ChartType type)
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: QObject(chart),
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m_chart(chart),
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m_options(QChart::NoAnimation),
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m_state(ShowState),
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m_background(0),
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m_plotAreaBackground(0),
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m_title(0)
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{
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if (type == QChart::ChartTypeCartesian)
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m_layout = new CartesianChartLayout(this);
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else if (type == QChart::ChartTypePolar)
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m_layout = new PolarChartLayout(this);
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Q_ASSERT(m_layout);
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}
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ChartPresenter::~ChartPresenter()
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{
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}
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void ChartPresenter::setGeometry(const QRectF rect)
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{
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if (m_rect != rect) {
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m_rect = rect;
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foreach (ChartItem *chart, m_chartItems) {
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chart->domain()->setSize(rect.size());
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chart->setPos(rect.topLeft());
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}
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}
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}
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QRectF ChartPresenter::geometry() const
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{
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return m_rect;
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}
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void ChartPresenter::handleAxisAdded(QAbstractAxis *axis)
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{
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axis->d_ptr->initializeGraphics(rootItem());
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axis->d_ptr->initializeAnimations(m_options);
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ChartAxisElement *item = axis->d_ptr->axisItem();
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item->setPresenter(this);
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item->setThemeManager(m_chart->d_ptr->m_themeManager);
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m_axisItems<<item;
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m_axes<<axis;
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m_layout->invalidate();
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}
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void ChartPresenter::handleAxisRemoved(QAbstractAxis *axis)
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{
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ChartAxisElement *item = axis->d_ptr->m_item.take();
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item->hide();
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item->disconnect();
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item->deleteLater();
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m_axisItems.removeAll(item);
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m_axes.removeAll(axis);
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m_layout->invalidate();
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}
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void ChartPresenter::handleSeriesAdded(QAbstractSeries *series)
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{
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series->d_ptr->initializeGraphics(rootItem());
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series->d_ptr->initializeAnimations(m_options);
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ChartItem *chart = series->d_ptr->chartItem();
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chart->setPresenter(this);
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chart->setThemeManager(m_chart->d_ptr->m_themeManager);
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chart->domain()->setSize(m_rect.size());
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chart->setPos(m_rect.topLeft());
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chart->handleDomainUpdated(); //this could be moved to intializeGraphics when animator is refactored
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m_chartItems<<chart;
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m_series<<series;
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m_layout->invalidate();
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}
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void ChartPresenter::handleSeriesRemoved(QAbstractSeries *series)
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{
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ChartItem *chart = series->d_ptr->m_item.take();
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chart->hide();
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chart->disconnect();
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chart->deleteLater();
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m_chartItems.removeAll(chart);
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m_series.removeAll(series);
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m_layout->invalidate();
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}
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void ChartPresenter::setAnimationOptions(QChart::AnimationOptions options)
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{
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if (m_options != options) {
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m_options = options;
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foreach(QAbstractSeries* series, m_series){
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series->d_ptr->initializeAnimations(m_options);
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}
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foreach(QAbstractAxis* axis, m_axes){
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axis->d_ptr->initializeAnimations(m_options);
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}
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}
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}
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void ChartPresenter::setState(State state,QPointF point)
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{
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m_state=state;
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m_statePoint=point;
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}
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QChart::AnimationOptions ChartPresenter::animationOptions() const
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{
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return m_options;
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}
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void ChartPresenter::createBackgroundItem()
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{
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if (!m_background) {
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m_background = new ChartBackground(rootItem());
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m_background->setPen(Qt::NoPen); // Theme doesn't touch pen so don't use default
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m_background->setBrush(QChartPrivate::defaultBrush());
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m_background->setZValue(ChartPresenter::BackgroundZValue);
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}
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}
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void ChartPresenter::createPlotAreaBackgroundItem()
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{
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if (!m_plotAreaBackground) {
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if (m_chart->chartType() == QChart::ChartTypeCartesian)
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m_plotAreaBackground = new QGraphicsRectItem(rootItem());
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else
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m_plotAreaBackground = new QGraphicsEllipseItem(rootItem());
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// Use transparent pen instead of Qt::NoPen, as Qt::NoPen causes
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// antialising artifacts with axis lines for some reason.
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m_plotAreaBackground->setPen(QPen(Qt::transparent));
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m_plotAreaBackground->setBrush(Qt::NoBrush);
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m_plotAreaBackground->setZValue(ChartPresenter::PlotAreaZValue);
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m_plotAreaBackground->setVisible(false);
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}
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}
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void ChartPresenter::createTitleItem()
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{
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if (!m_title) {
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m_title = new ChartTitle(rootItem());
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m_title->setZValue(ChartPresenter::BackgroundZValue);
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}
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}
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void ChartPresenter::handleAnimationFinished()
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{
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m_animations.removeAll(qobject_cast<ChartAnimation *>(sender()));
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if (m_animations.empty())
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emit animationsFinished();
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}
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void ChartPresenter::startAnimation(ChartAnimation *animation)
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{
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if (animation->state() != QAbstractAnimation::Stopped) animation->stop();
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QObject::connect(animation, SIGNAL(finished()), this, SLOT(handleAnimationFinished()), Qt::UniqueConnection);
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if (!m_animations.isEmpty())
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m_animations.append(animation);
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QTimer::singleShot(0, animation, SLOT(start()));
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}
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void ChartPresenter::setBackgroundBrush(const QBrush &brush)
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{
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createBackgroundItem();
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m_background->setBrush(brush);
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m_layout->invalidate();
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}
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QBrush ChartPresenter::backgroundBrush() const
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{
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if (!m_background)
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return QBrush();
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return m_background->brush();
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}
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void ChartPresenter::setBackgroundPen(const QPen &pen)
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{
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createBackgroundItem();
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m_background->setPen(pen);
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m_layout->invalidate();
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}
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QPen ChartPresenter::backgroundPen() const
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{
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if (!m_background)
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return QPen();
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return m_background->pen();
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}
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void ChartPresenter::setPlotAreaBackgroundBrush(const QBrush &brush)
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{
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createPlotAreaBackgroundItem();
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m_plotAreaBackground->setBrush(brush);
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m_layout->invalidate();
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}
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QBrush ChartPresenter::plotAreaBackgroundBrush() const
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{
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if (!m_plotAreaBackground)
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return QBrush();
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return m_plotAreaBackground->brush();
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}
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void ChartPresenter::setPlotAreaBackgroundPen(const QPen &pen)
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{
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createPlotAreaBackgroundItem();
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m_plotAreaBackground->setPen(pen);
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m_layout->invalidate();
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}
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QPen ChartPresenter::plotAreaBackgroundPen() const
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{
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if (!m_plotAreaBackground)
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return QPen();
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return m_plotAreaBackground->pen();
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}
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void ChartPresenter::setTitle(const QString &title)
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{
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createTitleItem();
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m_title->setText(title);
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m_layout->invalidate();
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}
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QString ChartPresenter::title() const
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{
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if (!m_title)
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return QString();
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return m_title->text();
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}
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void ChartPresenter::setTitleFont(const QFont &font)
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{
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createTitleItem();
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m_title->setFont(font);
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m_layout->invalidate();
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}
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QFont ChartPresenter::titleFont() const
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{
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if (!m_title)
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return QFont();
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return m_title->font();
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}
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void ChartPresenter::setTitleBrush(const QBrush &brush)
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{
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createTitleItem();
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m_title->setDefaultTextColor(brush.color());
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m_layout->invalidate();
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}
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QBrush ChartPresenter::titleBrush() const
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{
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if (!m_title)
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return QBrush();
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return QBrush(m_title->defaultTextColor());
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}
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void ChartPresenter::setBackgroundVisible(bool visible)
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{
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createBackgroundItem();
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m_background->setVisible(visible);
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}
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bool ChartPresenter::isBackgroundVisible() const
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{
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if (!m_background)
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return false;
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return m_background->isVisible();
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}
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void ChartPresenter::setPlotAreaBackgroundVisible(bool visible)
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{
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createPlotAreaBackgroundItem();
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m_plotAreaBackground->setVisible(visible);
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}
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bool ChartPresenter::isPlotAreaBackgroundVisible() const
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{
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if (!m_plotAreaBackground)
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return false;
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return m_plotAreaBackground->isVisible();
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}
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void ChartPresenter::setBackgroundDropShadowEnabled(bool enabled)
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{
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createBackgroundItem();
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m_background->setDropShadowEnabled(enabled);
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}
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bool ChartPresenter::isBackgroundDropShadowEnabled() const
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{
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if (!m_background)
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return false;
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return m_background->isDropShadowEnabled();
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}
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AbstractChartLayout *ChartPresenter::layout()
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{
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return m_layout;
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}
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QLegend *ChartPresenter::legend()
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{
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return m_chart->legend();
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}
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void ChartPresenter::setVisible(bool visible)
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{
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m_chart->setVisible(visible);
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}
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ChartBackground *ChartPresenter::backgroundElement()
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{
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return m_background;
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}
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QAbstractGraphicsShapeItem *ChartPresenter::plotAreaElement()
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{
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return m_plotAreaBackground;
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}
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QList<ChartAxisElement *> ChartPresenter::axisItems() const
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{
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return m_axisItems;
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}
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QList<ChartItem *> ChartPresenter::chartItems() const
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{
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return m_chartItems;
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}
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ChartTitle *ChartPresenter::titleElement()
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{
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return m_title;
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}
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QRectF ChartPresenter::textBoundingRect(const QFont &font, const QString &text, qreal angle)
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{
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if (!dummyTextItem)
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dummyTextItem = new QGraphicsTextItem;
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dummyTextItem->setFont(font);
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dummyTextItem->setHtml(text);
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QRectF boundingRect = dummyTextItem->boundingRect();
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// Take rotation into account
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if (angle) {
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QTransform transform;
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transform.rotate(angle);
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boundingRect = transform.mapRect(boundingRect);
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}
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return boundingRect;
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}
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// boundingRect parameter returns the rotated bounding rect of the text
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QString ChartPresenter::truncatedText(const QFont &font, const QString &text, qreal angle,
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qreal maxSize, Qt::Orientation constraintOrientation,
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QRectF &boundingRect)
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{
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QString truncatedString(text);
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boundingRect = textBoundingRect(font, truncatedString, angle);
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qreal checkDimension = ((constraintOrientation == Qt::Horizontal)
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? boundingRect.width() : boundingRect.height());
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if (checkDimension > maxSize) {
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// It can be assumed that almost any amount of string manipulation is faster
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// than calculating one bounding rectangle, so first prepare a list of truncated strings
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// to try.
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if (!truncateMatcher)
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truncateMatcher = new QRegExp(truncateMatchString);
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QVector<QString> testStrings(text.length());
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int count(0);
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static QLatin1Char closeTag('>');
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static QLatin1Char openTag('<');
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static QLatin1Char semiColon(';');
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static QLatin1String ellipsis("...");
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while (truncatedString.length() > 1) {
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int chopIndex(-1);
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int chopCount(1);
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QChar lastChar(truncatedString.at(truncatedString.length() - 1));
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if (lastChar == closeTag)
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chopIndex = truncatedString.lastIndexOf(openTag);
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else if (lastChar == semiColon)
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chopIndex = truncateMatcher->indexIn(truncatedString, 0);
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if (chopIndex != -1)
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chopCount = truncatedString.length() - chopIndex;
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truncatedString.chop(chopCount);
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testStrings[count] = truncatedString + ellipsis;
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count++;
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}
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// Binary search for best fit
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int minIndex(0);
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int maxIndex(count - 1);
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int bestIndex(count);
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QRectF checkRect;
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while (maxIndex >= minIndex) {
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int mid = (maxIndex + minIndex) / 2;
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checkRect = textBoundingRect(font, testStrings.at(mid), angle);
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checkDimension = ((constraintOrientation == Qt::Horizontal)
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? checkRect.width() : checkRect.height());
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if (checkDimension > maxSize) {
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// Checked index too large, all under this are also too large
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minIndex = mid + 1;
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} else {
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// Checked index fits, all over this also fit
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maxIndex = mid - 1;
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bestIndex = mid;
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boundingRect = checkRect;
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}
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|
}
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|
// Default to "..." if nothing fits
|
|
|
if (bestIndex == count) {
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|
|
boundingRect = textBoundingRect(font, ellipsis, angle);
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|
|
truncatedString = ellipsis;
|
|
|
} else {
|
|
|
truncatedString = testStrings.at(bestIndex);
|
|
|
}
|
|
|
}
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|
|
|
|
|
return truncatedString;
|
|
|
}
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|
|
|
|
|
#include "moc_chartpresenter_p.cpp"
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|
|
|
|
|
QTCOMMERCIALCHART_END_NAMESPACE
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|
