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/****************************************************************************
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**
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** Copyright (C) 2012 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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#ifndef QLEGEND_H
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#define QLEGEND_H
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#include <QChartGlobal>
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#include <QGraphicsWidget>
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#include <QPen>
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#include <QBrush>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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class Domain;
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class LegendMarker;
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class QPieSlice;
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class QXYSeries;
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class QBarSet;
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class QBarSeries;
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class QPieSeries;
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class QAreaSeries;
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class LegendScrollButton;
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class QSeries;
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class QChart;
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class QTCOMMERCIALCHART_EXPORT QLegend : public QGraphicsWidget
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{
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Q_OBJECT
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public:
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// We only support these alignments (for now)
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enum Alignment {
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AlignmentTop = Qt::AlignTop,
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AlignmentBottom = Qt::AlignBottom,
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AlignmentLeft = Qt::AlignLeft,
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AlignmentRight = Qt::AlignRight
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};
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Q_DECLARE_FLAGS(Alignments, Alignment)
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private:
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explicit QLegend(QChart *chart);
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public:
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void paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget = 0);
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QRectF boundingRect() const;
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void setBrush(const QBrush &brush);
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QBrush brush() const;
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void setPen(const QPen &pen);
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QPen pen() const;
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void setAlignmnent(QLegend::Alignments alignment);
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QLegend::Alignments alignment() const;
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QSizeF maximumSize() const;
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void setMaximumSize(const QSizeF size);
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QSizeF size() const;
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void setSize(const QSizeF size);
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void setPos(const QPointF &pos);
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void scrollButtonClicked(LegendScrollButton *scrollButton);
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void detachFromChart();
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void attachToChart();
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bool attachedToChart();
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Q_SIGNALS:
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// for interactions.
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void clicked(QSeries *series, Qt::MouseButton button);
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void clicked(QBarSet *barset, Qt::MouseButton button);
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void clicked(QPieSlice *slice, Qt::MouseButton button);
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void legendGeometryChanged();
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public Q_SLOTS:
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// PIMPL --->
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void handleSeriesAdded(QSeries *series, Domain *domain);
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void handleSeriesRemoved(QSeries *series);
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void handleAdded(QList<QPieSlice *> slices);
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void handleRemoved(QList<QPieSlice *> slices);
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void handleMarkerDestroyed();
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// PIMPL <---
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private:
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// PIMPL --->
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void appendMarkers(QAreaSeries *series);
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void appendMarkers(QXYSeries *series);
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void appendMarkers(QBarSeries *series);
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void appendMarkers(QPieSeries *series);
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void deleteMarkers(QSeries *series);
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void updateLayout();
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void layoutHorizontal();
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void layoutVertical();
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void rescaleScrollButtons(const QSize &size);
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QSizeF maximumMarkerSize();
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void checkFirstMarkerBounds();
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bool scrollButtonsVisible();
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qreal m_margin;
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QPointF m_pos;
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QSizeF m_minimumSize;
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QSizeF m_maximumSize;
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QSizeF m_size;
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QList<LegendMarker *> m_markers;
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QBrush m_brush;
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QPen m_pen;
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QLegend::Alignments m_alignment;
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int mFirstMarker;
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LegendScrollButton *m_scrollButtonLeft;
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LegendScrollButton *m_scrollButtonRight;
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LegendScrollButton *m_scrollButtonUp;
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LegendScrollButton *m_scrollButtonDown;
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bool m_attachedToChart;
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QChart *m_chart;
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friend class QChart;
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// <--- PIMPL
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};
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QTCOMMERCIALCHART_END_NAMESPACE
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#endif // QLEGEND_H
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