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/****************************************************************************
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**
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** Copyright (C) 2014 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.io
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**
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** This file is part of the Qt Charts module.
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**
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** Licensees holding valid commercial license for Qt may use this file in
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** accordance with the Qt License Agreement provided with the Software
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** or, alternatively, in accordance with the terms contained in a written
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** 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.io
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**
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****************************************************************************/
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#include <private/chartaxiselement_p.h>
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#include <private/qabstractaxis_p.h>
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#include <private/chartpresenter_p.h>
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#include <private/abstractchartlayout_p.h>
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#include <QtCore/QtMath>
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#include <QtCore/QDateTime>
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#include <QtGui/QTextDocument>
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#include <cmath>
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QT_CHARTS_BEGIN_NAMESPACE
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static const char *labelFormatMatchString = "%[\\-\\+#\\s\\d\\.\\'lhjztL]*([dicuoxfegXFEG])";
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static const char *labelFormatMatchLocalizedString = "^([^%]*)%\\.(\\d+)([defgiEG])(.*)$";
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static QRegExp *labelFormatMatcher = 0;
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static QRegExp *labelFormatMatcherLocalized = 0;
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class StaticLabelFormatMatcherDeleter
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{
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public:
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StaticLabelFormatMatcherDeleter() {}
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~StaticLabelFormatMatcherDeleter() {
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delete labelFormatMatcher;
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delete labelFormatMatcherLocalized;
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}
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};
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static StaticLabelFormatMatcherDeleter staticLabelFormatMatcherDeleter;
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ChartAxisElement::ChartAxisElement(QAbstractAxis *axis, QGraphicsItem *item, bool intervalAxis)
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: ChartElement(item),
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m_axis(axis),
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m_animation(0),
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m_grid(new QGraphicsItemGroup(item)),
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m_arrow(new QGraphicsItemGroup(item)),
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m_shades(new QGraphicsItemGroup(item)),
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m_labels(new QGraphicsItemGroup(item)),
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m_title(new QGraphicsTextItem(item)),
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m_intervalAxis(intervalAxis)
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{
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//initial initialization
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m_arrow->setHandlesChildEvents(false);
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m_arrow->setZValue(ChartPresenter::AxisZValue);
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m_labels->setZValue(ChartPresenter::AxisZValue);
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m_shades->setZValue(ChartPresenter::ShadesZValue);
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m_grid->setZValue(ChartPresenter::GridZValue);
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m_title->setZValue(ChartPresenter::GridZValue);
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m_title->document()->setDocumentMargin(ChartPresenter::textMargin());
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handleVisibleChanged(axis->isVisible());
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connectSlots();
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setFlag(QGraphicsItem::ItemHasNoContents, true);
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}
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ChartAxisElement::~ChartAxisElement()
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{
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}
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void ChartAxisElement::connectSlots()
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{
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QObject::connect(axis(), SIGNAL(visibleChanged(bool)), this, SLOT(handleVisibleChanged(bool)));
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QObject::connect(axis(), SIGNAL(lineVisibleChanged(bool)), this, SLOT(handleArrowVisibleChanged(bool)));
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QObject::connect(axis(), SIGNAL(gridVisibleChanged(bool)), this, SLOT(handleGridVisibleChanged(bool)));
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QObject::connect(axis(), SIGNAL(labelsVisibleChanged(bool)), this, SLOT(handleLabelsVisibleChanged(bool)));
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QObject::connect(axis(), SIGNAL(shadesVisibleChanged(bool)), this, SLOT(handleShadesVisibleChanged(bool)));
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QObject::connect(axis(), SIGNAL(labelsAngleChanged(int)), this, SLOT(handleLabelsAngleChanged(int)));
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QObject::connect(axis(), SIGNAL(linePenChanged(const QPen&)), this, SLOT(handleArrowPenChanged(const QPen&)));
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QObject::connect(axis(), SIGNAL(labelsBrushChanged(const QBrush&)), this, SLOT(handleLabelsBrushChanged(const QBrush&)));
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QObject::connect(axis(), SIGNAL(labelsFontChanged(const QFont&)), this, SLOT(handleLabelsFontChanged(const QFont&)));
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QObject::connect(axis(), SIGNAL(gridLinePenChanged(const QPen&)), this, SLOT(handleGridPenChanged(const QPen&)));
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QObject::connect(axis(), SIGNAL(shadesPenChanged(const QPen&)), this, SLOT(handleShadesPenChanged(const QPen&)));
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QObject::connect(axis(), SIGNAL(shadesBrushChanged(const QBrush&)), this, SLOT(handleShadesBrushChanged(const QBrush&)));
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QObject::connect(axis(), SIGNAL(titleTextChanged(const QString&)), this, SLOT(handleTitleTextChanged(const QString&)));
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QObject::connect(axis(), SIGNAL(titleFontChanged(const QFont&)), this, SLOT(handleTitleFontChanged(const QFont&)));
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QObject::connect(axis(), SIGNAL(titleBrushChanged(const QBrush&)), this, SLOT(handleTitleBrushChanged(const QBrush&)));
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QObject::connect(axis(), SIGNAL(titleVisibleChanged(bool)), this, SLOT(handleTitleVisibleChanged(bool)));
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QObject::connect(axis()->d_ptr.data(), SIGNAL(rangeChanged(qreal, qreal)), this, SLOT(handleRangeChanged(qreal, qreal)));
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}
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void ChartAxisElement::handleArrowVisibleChanged(bool visible)
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{
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m_arrow->setVisible(visible);
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}
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void ChartAxisElement::handleGridVisibleChanged(bool visible)
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{
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m_grid->setVisible(visible);
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}
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void ChartAxisElement::handleLabelsVisibleChanged(bool visible)
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{
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QGraphicsLayoutItem::updateGeometry();
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presenter()->layout()->invalidate();
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m_labels->setVisible(visible);
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}
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void ChartAxisElement::handleShadesVisibleChanged(bool visible)
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{
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m_shades->setVisible(visible);
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}
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void ChartAxisElement::handleTitleVisibleChanged(bool visible)
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{
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QGraphicsLayoutItem::updateGeometry();
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presenter()->layout()->invalidate();
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m_title->setVisible(visible);
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}
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void ChartAxisElement::handleLabelsAngleChanged(int angle)
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{
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foreach (QGraphicsItem *item, m_labels->childItems())
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item->setRotation(angle);
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QGraphicsLayoutItem::updateGeometry();
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presenter()->layout()->invalidate();
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}
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void ChartAxisElement::handleLabelsBrushChanged(const QBrush &brush)
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{
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foreach (QGraphicsItem *item, m_labels->childItems())
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static_cast<QGraphicsTextItem *>(item)->setDefaultTextColor(brush.color());
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}
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void ChartAxisElement::handleLabelsFontChanged(const QFont &font)
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{
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foreach (QGraphicsItem *item, m_labels->childItems())
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static_cast<QGraphicsTextItem *>(item)->setFont(font);
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QGraphicsLayoutItem::updateGeometry();
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presenter()->layout()->invalidate();
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}
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void ChartAxisElement::handleTitleTextChanged(const QString &title)
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{
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QGraphicsLayoutItem::updateGeometry();
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presenter()->layout()->invalidate();
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if (title.isEmpty() || !m_title->isVisible())
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m_title->setHtml(title);
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}
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void ChartAxisElement::handleTitleBrushChanged(const QBrush &brush)
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{
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m_title->setDefaultTextColor(brush.color());
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}
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void ChartAxisElement::handleTitleFontChanged(const QFont &font)
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{
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if (m_title->font() != font) {
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m_title->setFont(font);
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QGraphicsLayoutItem::updateGeometry();
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presenter()->layout()->invalidate();
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}
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}
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void ChartAxisElement::handleVisibleChanged(bool visible)
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{
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setVisible(visible);
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if (!visible) {
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m_grid->setVisible(visible);
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m_arrow->setVisible(visible);
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m_shades->setVisible(visible);
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m_labels->setVisible(visible);
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m_title->setVisible(visible);
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} else {
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m_grid->setVisible(axis()->isGridLineVisible());
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m_arrow->setVisible(axis()->isLineVisible());
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m_shades->setVisible(axis()->shadesVisible());
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m_labels->setVisible(axis()->labelsVisible());
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m_title->setVisible(axis()->isTitleVisible());
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}
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if (presenter()) presenter()->layout()->invalidate();
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}
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void ChartAxisElement::handleRangeChanged(qreal min, qreal max)
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{
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Q_UNUSED(min);
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Q_UNUSED(max);
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if (!isEmpty()) {
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QVector<qreal> layout = calculateLayout();
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updateLayout(layout);
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QSizeF before = effectiveSizeHint(Qt::PreferredSize);
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QSizeF after = sizeHint(Qt::PreferredSize);
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if (before != after) {
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QGraphicsLayoutItem::updateGeometry();
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// We don't want to call invalidate on layout, since it will change minimum size of
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// component, which we would like to avoid since it causes nasty flips when scrolling
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// or zooming, instead recalculate layout and use plotArea for extra space.
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presenter()->layout()->setGeometry(presenter()->layout()->geometry());
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}
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}
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}
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bool ChartAxisElement::isEmpty()
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{
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return axisGeometry().isEmpty()
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|| gridGeometry().isEmpty()
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|| qFuzzyCompare(min(), max());
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}
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qreal ChartAxisElement::min() const
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{
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return m_axis->d_ptr->min();
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}
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qreal ChartAxisElement::max() const
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{
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return m_axis->d_ptr->max();
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}
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QString ChartAxisElement::formatLabel(const QString &formatSpec, const QByteArray &array,
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qreal value, int precision, const QString &preStr,
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const QString &postStr) const
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{
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QString retVal;
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if (!formatSpec.isEmpty()) {
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if (formatSpec.at(0) == QLatin1Char('d')
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|| formatSpec.at(0) == QLatin1Char('i')
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|| formatSpec.at(0) == QLatin1Char('c')) {
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if (presenter()->localizeNumbers())
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retVal = preStr + presenter()->locale().toString(qint64(value)) + postStr;
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else
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retVal = QString().sprintf(array, qint64(value));
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} else if (formatSpec.at(0) == QLatin1Char('u')
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|| formatSpec.at(0) == QLatin1Char('o')
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|| formatSpec.at(0) == QLatin1Char('x')
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|| formatSpec.at(0) == QLatin1Char('X')) {
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// These formats are not supported by localized numbers
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retVal = QString().sprintf(array, quint64(value));
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} else if (formatSpec.at(0) == QLatin1Char('f')
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|| formatSpec.at(0) == QLatin1Char('F')
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|| formatSpec.at(0) == QLatin1Char('e')
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|| formatSpec.at(0) == QLatin1Char('E')
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|| formatSpec.at(0) == QLatin1Char('g')
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|| formatSpec.at(0) == QLatin1Char('G')) {
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if (presenter()->localizeNumbers()) {
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retVal = preStr
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+ presenter()->locale().toString(value, formatSpec.at(0).toLatin1(),
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precision)
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+ postStr;
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} else {
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retVal = QString().sprintf(array, value);
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}
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}
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}
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return retVal;
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}
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QStringList ChartAxisElement::createValueLabels(qreal min, qreal max, int ticks,
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const QString &format) const
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{
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QStringList labels;
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if (max <= min || ticks < 1)
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return labels;
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if (format.isNull()) {
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int n = qMax(int(-qFloor(std::log10((max - min) / (ticks - 1)))), 0) + 1;
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for (int i = 0; i < ticks; i++) {
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qreal value = min + (i * (max - min) / (ticks - 1));
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labels << presenter()->numberToString(value, 'f', n);
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}
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} else {
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QByteArray array = format.toLatin1();
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QString formatSpec;
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QString preStr;
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QString postStr;
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int precision = 6; // Six is the default precision in Qt API
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if (presenter()->localizeNumbers()) {
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if (!labelFormatMatcherLocalized)
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labelFormatMatcherLocalized
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= new QRegExp(QString::fromLatin1(labelFormatMatchLocalizedString));
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if (labelFormatMatcherLocalized->indexIn(format, 0) != -1) {
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preStr = labelFormatMatcherLocalized->cap(1);
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if (!labelFormatMatcherLocalized->cap(2).isEmpty())
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precision = labelFormatMatcherLocalized->cap(2).toInt();
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formatSpec = labelFormatMatcherLocalized->cap(3);
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postStr = labelFormatMatcherLocalized->cap(4);
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}
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} else {
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if (!labelFormatMatcher)
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labelFormatMatcher = new QRegExp(QString::fromLatin1(labelFormatMatchString));
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if (labelFormatMatcher->indexIn(format, 0) != -1)
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formatSpec = labelFormatMatcher->cap(1);
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}
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for (int i = 0; i < ticks; i++) {
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qreal value = min + (i * (max - min) / (ticks - 1));
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labels << formatLabel(formatSpec, array, value, precision, preStr, postStr);
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}
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}
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return labels;
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}
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QStringList ChartAxisElement::createLogValueLabels(qreal min, qreal max, qreal base, int ticks,
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const QString &format) const
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{
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QStringList labels;
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if (max <= min || ticks < 1)
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return labels;
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int firstTick;
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if (base > 1)
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firstTick = qCeil(std::log10(min) / std::log10(base));
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else
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firstTick = qCeil(std::log10(max) / std::log10(base));
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if (format.isNull()) {
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int n = 0;
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if (ticks > 1)
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n = qMax(int(-qFloor(std::log10((max - min) / (ticks - 1)))), 0);
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n++;
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for (int i = firstTick; i < ticks + firstTick; i++) {
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qreal value = qPow(base, i);
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labels << presenter()->numberToString(value, 'f', n);
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}
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} else {
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QByteArray array = format.toLatin1();
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QString formatSpec;
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QString preStr;
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QString postStr;
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int precision = 6; // Six is the default precision in Qt API
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if (presenter()->localizeNumbers()) {
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if (!labelFormatMatcherLocalized)
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labelFormatMatcherLocalized =
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new QRegExp(QString::fromLatin1(labelFormatMatchLocalizedString));
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if (labelFormatMatcherLocalized->indexIn(format, 0) != -1) {
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preStr = labelFormatMatcherLocalized->cap(1);
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if (!labelFormatMatcherLocalized->cap(2).isEmpty())
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precision = labelFormatMatcherLocalized->cap(2).toInt();
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formatSpec = labelFormatMatcherLocalized->cap(3);
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postStr = labelFormatMatcherLocalized->cap(4);
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}
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} else {
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if (!labelFormatMatcher)
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labelFormatMatcher = new QRegExp(QString::fromLatin1(labelFormatMatchString));
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if (labelFormatMatcher->indexIn(format, 0) != -1)
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formatSpec = labelFormatMatcher->cap(1);
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}
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for (int i = firstTick; i < ticks + firstTick; i++) {
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qreal value = qPow(base, i);
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labels << formatLabel(formatSpec, array, value, precision, preStr, postStr);
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}
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}
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return labels;
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}
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QStringList ChartAxisElement::createDateTimeLabels(qreal min, qreal max,int ticks,
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const QString &format) const
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{
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QStringList labels;
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if (max <= min || ticks < 1)
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return labels;
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int n = qMax(int(-qFloor(std::log10((max - min) / (ticks - 1)))), 0);
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n++;
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for (int i = 0; i < ticks; i++) {
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qreal value = min + (i * (max - min) / (ticks - 1));
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labels << presenter()->locale().toString(QDateTime::fromMSecsSinceEpoch(value), format);
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}
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return labels;
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}
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void ChartAxisElement::axisSelected()
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{
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emit clicked();
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}
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#include "moc_chartaxiselement_p.cpp"
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QT_CHARTS_END_NAMESPACE
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