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/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the Qt Charts module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:GPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the 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 The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 or (at your option) any later version
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** approved by the KDE Free Qt Foundation. The licenses are as published by
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** the Free Software Foundation and appearing in the file LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtGui/QPainter>
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#include <QtWidgets/QGraphicsSceneEvent>
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#include <QtWidgets/QGraphicsTextItem>
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#include <QtGui/QTextDocument>
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#include <QtCharts/QLegend>
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#include <private/qlegend_p.h>
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#include <QtCharts/QLegendMarker>
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#include <private/qlegendmarker_p.h>
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#include <private/legendmarkeritem_p.h>
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#include <private/chartpresenter_p.h>
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QT_CHARTS_BEGIN_NAMESPACE
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LegendMarkerItem::LegendMarkerItem(QLegendMarkerPrivate *marker, QGraphicsObject *parent) :
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QGraphicsObject(parent),
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m_marker(marker),
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m_markerRect(0,0,10.0,10.0),
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m_boundingRect(0,0,0,0),
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m_textItem(new QGraphicsTextItem(this)),
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m_rectItem(new QGraphicsRectItem(this)),
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m_margin(3),
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m_space(4),
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m_hovering(false),
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m_pressPos(0, 0)
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{
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m_rectItem->setRect(m_markerRect);
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m_textItem->document()->setDocumentMargin(ChartPresenter::textMargin());
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setAcceptHoverEvents(true);
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}
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LegendMarkerItem::~LegendMarkerItem()
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{
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if (m_hovering) {
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emit m_marker->q_ptr->hovered(false);
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}
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}
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void LegendMarkerItem::setPen(const QPen &pen)
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{
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m_rectItem->setPen(pen);
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}
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QPen LegendMarkerItem::pen() const
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{
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return m_rectItem->pen();
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}
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void LegendMarkerItem::setBrush(const QBrush &brush)
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{
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m_rectItem->setBrush(brush);
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}
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QBrush LegendMarkerItem::brush() const
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{
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return m_rectItem->brush();
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}
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void LegendMarkerItem::setFont(const QFont &font)
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{
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m_textItem->setFont(font);
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QFontMetrics fn(font);
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m_markerRect = QRectF(0,0,fn.height()/2,fn.height()/2);
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updateGeometry();
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}
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QFont LegendMarkerItem::font() const
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{
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return m_textItem->font();
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}
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void LegendMarkerItem::setLabel(const QString label)
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{
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m_label = label;
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updateGeometry();
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}
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QString LegendMarkerItem::label() const
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{
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return m_label;
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}
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void LegendMarkerItem::setLabelBrush(const QBrush &brush)
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{
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m_textItem->setDefaultTextColor(brush.color());
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}
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QBrush LegendMarkerItem::labelBrush() const
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{
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return QBrush(m_textItem->defaultTextColor());
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}
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void LegendMarkerItem::setGeometry(const QRectF &rect)
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{
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qreal width = rect.width();
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qreal x = m_margin + m_markerRect.width() + m_space + m_margin;
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QRectF truncatedRect;
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m_textItem->setHtml(ChartPresenter::truncatedText(m_textItem->font(), m_label, qreal(0.0),
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width - x, rect.height(), truncatedRect));
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m_textItem->setTextWidth(truncatedRect.width());
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qreal y = qMax(m_markerRect.height() + 2 * m_margin, truncatedRect.height() + 2 * m_margin);
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const QRectF &textRect = m_textItem->boundingRect();
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m_textItem->setPos(x - m_margin, y / 2 - textRect.height() / 2);
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m_rectItem->setRect(m_markerRect);
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// The textMargin adjustments to position are done to make default case rects less blurry with anti-aliasing
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m_rectItem->setPos(m_margin - ChartPresenter::textMargin(), y / 2.0 - m_markerRect.height() / 2.0 + ChartPresenter::textMargin());
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prepareGeometryChange();
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m_boundingRect = QRectF(0, 0, x + textRect.width() + m_margin, y);
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}
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QRectF LegendMarkerItem::boundingRect() const
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{
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return m_boundingRect;
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}
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void LegendMarkerItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
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{
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Q_UNUSED(option)
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Q_UNUSED(widget)
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Q_UNUSED(painter)
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}
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QSizeF LegendMarkerItem::sizeHint(Qt::SizeHint which, const QSizeF& constraint) const
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{
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Q_UNUSED(constraint)
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QSizeF sh;
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switch (which) {
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case Qt::MinimumSize: {
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QRectF labelRect = ChartPresenter::textBoundingRect(m_textItem->font(),
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QStringLiteral("..."));
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sh = QSizeF(labelRect.width() + (2.0 * m_margin) + m_space + m_markerRect.width(),
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qMax(m_markerRect.height(), labelRect.height()) + (2.0 * m_margin));
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break;
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}
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case Qt::PreferredSize: {
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QRectF labelRect = ChartPresenter::textBoundingRect(m_textItem->font(), m_label);
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sh = QSizeF(labelRect.width() + (2.0 * m_margin) + m_space + m_markerRect.width(),
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qMax(m_markerRect.height(), labelRect.height()) + (2.0 * m_margin));
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break;
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}
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default:
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break;
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}
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return sh;
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}
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void LegendMarkerItem::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
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{
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Q_UNUSED(event)
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m_hovering = true;
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emit m_marker->q_ptr->hovered(true);
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}
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void LegendMarkerItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
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{
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Q_UNUSED(event)
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m_hovering = false;
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emit m_marker->q_ptr->hovered(false);
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}
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#include "moc_legendmarkeritem_p.cpp"
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QT_CHARTS_END_NAMESPACE
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