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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 "chartaxiselement_p.h"
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#include "qabstractaxis_p.h"
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#include "chartpresenter_p.h"
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#include "abstractchartlayout_p.h"
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#include <qmath.h>
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#include <QDateTime>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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QGraphicsSimpleTextItem *dummyTextItem = 0;
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class StaticDeleter
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{
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public:
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StaticDeleter() {}
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~StaticDeleter() { delete dummyTextItem; }
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};
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StaticDeleter staticDeleter;
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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 QGraphicsSimpleTextItem(item)),
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m_intervalAxis(intervalAxis)
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{
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//initial initialization
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if (!dummyTextItem)
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dummyTextItem = new QGraphicsSimpleTextItem;
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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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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(labelsPenChanged(const QPen&)), this, SLOT(handleLabelsPenChanged(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(titlePenChanged(const QPen&)), this, SLOT(handleTitlePenChanged(const QPen&)));
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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::handleLabelsPenChanged(const QPen &pen)
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{
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foreach (QGraphicsItem *item, m_labels->childItems())
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static_cast<QGraphicsSimpleTextItem *>(item)->setPen(pen);
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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<QGraphicsSimpleTextItem *>(item)->setBrush(brush);
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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<QGraphicsSimpleTextItem *>(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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m_title->setText(title);
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}
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void ChartAxisElement::handleTitlePenChanged(const QPen &pen)
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{
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m_title->setPen(pen);
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}
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void ChartAxisElement::handleTitleBrushChanged(const QBrush &brush)
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{
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m_title->setBrush(brush);
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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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QRectF ChartAxisElement::textBoundingRect(const QFont &font, const QString &text, qreal angle) const
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{
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dummyTextItem->setFont(font);
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dummyTextItem->setText(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 ChartAxisElement::truncatedText(const QFont &font, const QString &text, qreal angle,
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qreal maxSize, Qt::Orientation constraintOrientation,
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QRectF &boundingRect) const
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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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truncatedString.append("...");
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while (checkDimension > maxSize && truncatedString.length() > 3) {
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truncatedString.remove(truncatedString.length() - 4, 1);
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boundingRect = textBoundingRect(font, truncatedString, angle);
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checkDimension = ((constraintOrientation == Qt::Horizontal)
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? boundingRect.width() : boundingRect.height());
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}
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}
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return truncatedString;
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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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QStringList ChartAxisElement::createValueLabels(qreal min, qreal max, int ticks, const QString &format)
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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(log10((max - min) / (ticks - 1)))), 0);
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n++;
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if (format.isNull()) {
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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 << QString::number(value, 'f', n);
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}
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} else {
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QByteArray array = format.toLatin1();
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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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if (format.contains("d")
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|| format.contains("i")
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|| format.contains("c")) {
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labels << QString().sprintf(array, (qint64)value);
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} else if (format.contains("u")
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|| format.contains("o")
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|| format.contains("x", Qt::CaseInsensitive)) {
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labels << QString().sprintf(array, (quint64)value);
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} else if (format.contains("f", Qt::CaseInsensitive)
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|| format.contains("e", Qt::CaseInsensitive)
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|| format.contains("g", Qt::CaseInsensitive)) {
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labels << QString().sprintf(array, value);
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} else {
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labels << QString();
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}
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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, const QString &format)
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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 = 0;
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if (ticks > 1)
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n = qMax(int(-qFloor(log10((max - min) / (ticks - 1)))), 0);
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n++;
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int firstTick;
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if (base > 1)
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firstTick = ceil(log10(min) / log10(base));
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else
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firstTick = ceil(log10(max) / log10(base));
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if (format.isNull()) {
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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 << QString::number(value, 'f', n);
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}
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} else {
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QByteArray array = format.toLatin1();
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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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if (format.contains("d")
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|| format.contains("i")
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|| format.contains("c")) {
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labels << QString().sprintf(array, (qint64)value);
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} else if (format.contains("u")
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|| format.contains("o")
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|| format.contains("x", Qt::CaseInsensitive)) {
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labels << QString().sprintf(array, (quint64)value);
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} else if (format.contains("f", Qt::CaseInsensitive)
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|| format.contains("e", Qt::CaseInsensitive)
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|| format.contains("g", Qt::CaseInsensitive)) {
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labels << QString().sprintf(array, value);
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} else {
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labels << QString();
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}
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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,const QString &format)
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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(-floor(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 << QDateTime::fromMSecsSinceEpoch(value).toString(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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QTCOMMERCIALCHART_END_NAMESPACE
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