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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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#include "qlegend.h"
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#include "qlegend_p.h"
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#include "qabstractseries.h"
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#include "qabstractseries_p.h"
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#include "qchart_p.h"
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#include "legendlayout_p.h"
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#include "legendmarker_p.h"
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#include "qxyseries.h"
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#include "qlineseries.h"
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#include "qareaseries.h"
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#include "qscatterseries.h"
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#include "qsplineseries.h"
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#include "qabstractbarseries.h"
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#include "qstackedbarseries.h"
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#include "qpercentbarseries.h"
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#include "qbarset.h"
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#include "qpieseries.h"
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#include "qpieseries_p.h"
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#include "qpieslice.h"
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#include "chartpresenter_p.h"
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#include <QPainter>
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#include <QPen>
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#include <QTimer>
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#include <QGraphicsLayout>
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#include <QGraphicsSceneEvent>
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QTCOMMERCIALCHART_BEGIN_NAMESPACE
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/*!
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\class QLegend
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\brief Legend object
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\mainclass
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QLegend is a graphical object, whics displays legend of the chart. Legend state is updated by QChart, when
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series have been changed. By default, legend is drawn by QChart, but user can set a new parent to legend and
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handle the drawing manually.
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User isn't supposed to create or delete legend objects, but can reference it via QChart class.
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\image examples_percentbarchart_legend.png
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\sa QChart
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*/
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/*!
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\qmlclass Legend QLegend
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\brief Legend is part of QtCommercial Chart QML API.
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Legend is a graphical object, whics displays legend of the chart. Legend state is updated by ChartView, when
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series have been changed. Legend is used via ChartView class. For example:
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\code
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ChartView {
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legend.visible: true
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legend.alignment: Qt.AlignBottom
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// Add a few series...
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}
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\endcode
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\image examples_percentbarchart_legend.png
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*/
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/*!
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\property QLegend::alignment
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\brief The alignment of the legend.
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Legend paints on the defined position in the chart. The following alignments are supported:
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Qt::AlignTop, Qt::AlignBottom, Qt::AlignLeft, Qt::AlignRight. If you set more than one flag the result is undefined.
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*/
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/*!
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\qmlproperty Qt.Alignment Legend::alignment
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\brief The alignment of the legend.
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Legend paints on the defined position in the chart. The following alignments are supported:
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Qt.AlignTop, Qt.AlignBottom, Qt.AlignLeft, Qt.AlignRight. If you set more than one flag the result is undefined.
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*/
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/*!
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\property QLegend::backgroundVisible
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Whether the legend background is visible or not.
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*/
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/*!
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\qmlproperty bool Legend::backgroundVisible
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Whether the legend background is visible or not.
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*/
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/*!
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\property QLegend::color
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The color of the legend, i.e. the background (brush) color. Note that if you change the color
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of the legend, the style of the legend brush is set to Qt::SolidPattern.
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*/
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/*!
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\qmlproperty color Legend::color
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The color of the legend, i.e. the background (brush) color.
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*/
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/*!
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\property QLegend::borderColor
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The border color of the legend, i.e. the line color.
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*/
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/*!
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\qmlproperty color Legend::borderColor
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The border color of the legend, i.e. the line color.
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*/
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/*!
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\property QLegend::font
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The font of markers used by legend
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*/
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/*!
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\qmlproperty color Legend::font
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The font of markers used by legend
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*/
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/*!
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\property QLegend::labelColor
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The color of brush used to draw labels.
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*/
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/*!
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\qmlproperty color QLegend::labelColor
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The color of brush used to draw labels.
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*/
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/*!
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\fn void QLegend::backgroundVisibleChanged(bool)
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The visibility of the legend background changed to \a visible.
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*/
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/*!
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\fn void QLegend::colorChanged(QColor)
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The color of the legend background changed to \a color.
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*/
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/*!
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\fn void QLegend::borderColorChanged(QColor)
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The border color of the legend background changed to \a color.
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*/
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/*!
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\fn void QLegend::fontChanged(QFont)
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The font of markers of the legend changed to \a font.
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*/
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/*!
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\fn void QLegend::labelColorChanged(QColor color)
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This signal is emitted when the color of brush used to draw labels has changed to \a color.
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*/
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/*!
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Constructs the legend object and sets the parent to \a parent
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*/
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QLegend::QLegend(QChart *chart):QGraphicsWidget(chart),
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d_ptr(new QLegendPrivate(chart->d_ptr->m_presenter,chart,this))
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{
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setZValue(ChartPresenter::LegendZValue);
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setFlags(QGraphicsItem::ItemClipsChildrenToShape);
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QObject::connect(chart->d_ptr->m_dataset,SIGNAL(seriesAdded(QAbstractSeries*,Domain*)),d_ptr.data(),SLOT(handleSeriesAdded(QAbstractSeries*,Domain*)));
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QObject::connect(chart->d_ptr->m_dataset,SIGNAL(seriesRemoved(QAbstractSeries*)),d_ptr.data(),SLOT(handleSeriesRemoved(QAbstractSeries*)));
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QObject::connect(chart->d_ptr->m_dataset,SIGNAL(seriesUpdated(QAbstractSeries*)),d_ptr.data(),SLOT(handleSeriesUpdated(QAbstractSeries*)));
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setLayout(d_ptr->m_layout);
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setVisible(false);
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}
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/*!
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Destroys the legend object. Legend is always owned by a QChart, so an application should never call this.
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*/
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QLegend::~QLegend()
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{
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}
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/*!
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\internal
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*/
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void QLegend::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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if(!d_ptr->m_backgroundVisible) return;
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painter->setOpacity(opacity());
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painter->setPen(d_ptr->m_pen);
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painter->setBrush(d_ptr->m_brush);
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painter->drawRoundRect(rect(),d_ptr->roundness(rect().width()),d_ptr->roundness(rect().height()));
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}
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/*!
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Sets the \a brush of legend. Brush affects the background of legend.
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*/
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void QLegend::setBrush(const QBrush &brush)
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{
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if (d_ptr->m_brush != brush) {
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d_ptr->m_brush = brush;
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update();
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emit colorChanged(brush.color());
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}
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}
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/*!
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Returns the brush used by legend.
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*/
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QBrush QLegend::brush() const
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{
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return d_ptr->m_brush;
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}
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void QLegend::setColor(QColor color)
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{
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QBrush b = d_ptr->m_brush;
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if (b.style() != Qt::SolidPattern || b.color() != color) {
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b.setStyle(Qt::SolidPattern);
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b.setColor(color);
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setBrush(b);
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}
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}
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QColor QLegend::color()
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{
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return d_ptr->m_brush.color();
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}
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/*!
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Sets the \a pen of legend. Pen affects the legend borders.
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*/
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void QLegend::setPen(const QPen &pen)
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{
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if (d_ptr->m_pen != pen) {
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d_ptr->m_pen = pen;
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update();
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emit borderColorChanged(pen.color());
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}
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}
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/*!
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Returns the pen used by legend
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*/
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QPen QLegend::pen() const
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{
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return d_ptr->m_pen;
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}
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void QLegend::setFont(const QFont &font)
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{
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if (d_ptr->m_font != font) {
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d_ptr->m_font = font;
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foreach (LegendMarker *marker, d_ptr->markers()) {
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marker->setFont(d_ptr->m_font);
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}
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layout()->invalidate();
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emit fontChanged(font);
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}
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}
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QFont QLegend::font() const
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{
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return d_ptr->m_font;
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}
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void QLegend::setBorderColor(QColor color)
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{
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QPen p = d_ptr->m_pen;
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if (p.color() != color) {
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p.setColor(color);
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setPen(p);
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}
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}
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QColor QLegend::borderColor()
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{
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return d_ptr->m_pen.color();
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}
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/*!
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Set brush used to draw labels to \a brush.
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*/
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void QLegend::setLabelBrush(const QBrush &brush)
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{
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if (d_ptr->m_labelBrush != brush) {
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d_ptr->m_labelBrush = brush;
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foreach (LegendMarker *marker, d_ptr->markers()) {
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marker->setLabelBrush(d_ptr->m_labelBrush);
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// Note: The pen of the marker rectangle could be exposed in the public QLegend API
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// instead of mapping it from label brush color
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marker->setPen(brush.color());
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}
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emit labelColorChanged(brush.color());
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}
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}
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/*!
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Brush used to draw labels.
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*/
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QBrush QLegend::labelBrush() const
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{
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return d_ptr->m_labelBrush;
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}
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void QLegend::setLabelColor(QColor color)
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{
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QBrush b = d_ptr->m_labelBrush;
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if (b.style() != Qt::SolidPattern || b.color() != color) {
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b.setStyle(Qt::SolidPattern);
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b.setColor(color);
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setLabelBrush(b);
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}
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}
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QColor QLegend::labelColor() const
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{
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return d_ptr->m_labelBrush.color();
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}
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void QLegend::setAlignment(Qt::Alignment alignment)
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{
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if(d_ptr->m_alignment!=alignment) {
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d_ptr->m_alignment = alignment;
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updateGeometry();
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if(isAttachedToChart()){
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d_ptr->m_presenter->layout()->invalidate();
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}else{
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layout()->invalidate();
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}
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}
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}
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Qt::Alignment QLegend::alignment() const
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{
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return d_ptr->m_alignment;
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}
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/*!
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Detaches the legend from chart. Chart won't change layout of the legend.
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*/
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void QLegend::detachFromChart()
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{
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d_ptr->m_attachedToChart = false;
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d_ptr->m_layout->invalidate();
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setParent(0);
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}
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/*!
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Attaches the legend to chart. Chart may change layout of the legend.
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*/
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void QLegend::attachToChart()
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{
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d_ptr->m_attachedToChart = true;
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d_ptr->m_presenter->layout()->invalidate();
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setParent(d_ptr->m_chart);
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}
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/*!
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Returns true, if legend is attached to chart.
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*/
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bool QLegend::isAttachedToChart()
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{
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return d_ptr->m_attachedToChart;
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}
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/*!
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Sets the visibility of legend background to \a visible
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*/
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void QLegend::setBackgroundVisible(bool visible)
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{
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if(d_ptr->m_backgroundVisible != visible) {
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d_ptr->m_backgroundVisible = visible;
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update();
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emit backgroundVisibleChanged(visible);
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}
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}
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/*!
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Returns the visibility of legend background
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*/
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bool QLegend::isBackgroundVisible() const
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{
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return d_ptr->m_backgroundVisible;
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}
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/*!
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\internal \a event see QGraphicsWidget for details
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*/
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void QLegend::hideEvent(QHideEvent *event)
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{
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d_ptr->m_presenter->layout()->invalidate();
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QGraphicsWidget::hideEvent(event);
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}
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/*!
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\internal \a event see QGraphicsWidget for details
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*/
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void QLegend::showEvent(QShowEvent *event)
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{
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QGraphicsWidget::showEvent(event);
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d_ptr->m_presenter->layout()->invalidate();
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d_ptr->items()->setVisible(false);
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//layout activation will show the items
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}
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////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
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QLegendPrivate::QLegendPrivate(ChartPresenter* presenter, QChart *chart, QLegend *q):
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q_ptr(q),
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m_presenter(presenter),
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m_layout(new LegendLayout(q)),
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m_chart(chart),
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m_items(new QGraphicsItemGroup(q)),
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m_alignment(Qt::AlignTop),
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m_brush(QBrush()),
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m_pen(QPen()),
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m_labelBrush(QBrush()),
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m_diameter(5),
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m_attachedToChart(true),
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m_backgroundVisible(false)
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{
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}
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QLegendPrivate::~QLegendPrivate()
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{
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}
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void QLegendPrivate::setOffset(qreal x, qreal y)
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{
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m_layout->setOffset(x,y);
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}
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QPointF QLegendPrivate::offset() const
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{
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return m_layout->offset();
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}
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int QLegendPrivate::roundness(qreal size)
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{
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return 100*m_diameter/int(size);
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}
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void QLegendPrivate::handleSeriesAdded(QAbstractSeries *series, Domain *domain)
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{
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Q_UNUSED(domain)
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QList<LegendMarker*> markers = series->d_ptr->createLegendMarker(q_ptr);
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foreach(LegendMarker* marker, markers) {
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marker->setFont(m_font);
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marker->setLabelBrush(m_labelBrush);
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marker->setVisible(series->isVisible());
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m_items->addToGroup(marker);
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m_markers<<marker;
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}
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QObject::connect(series, SIGNAL(visibleChanged()), this, SLOT(handleSeriesVisibleChanged()));
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|
|
if(series->type() == QAbstractSeries::SeriesTypePie) {
|
|
|
QPieSeries *pieSeries = static_cast<QPieSeries *>(series);
|
|
|
QObject::connect(pieSeries, SIGNAL(added(QList<QPieSlice*>)), this, SLOT(handleUpdatePieSeries()));
|
|
|
QObject::connect(pieSeries, SIGNAL(removed(QList<QPieSlice*>)), this, SLOT(handleUpdatePieSeries()));
|
|
|
}
|
|
|
|
|
|
q_ptr->layout()->invalidate();
|
|
|
q_ptr->layout()->activate();
|
|
|
}
|
|
|
|
|
|
void QLegendPrivate::handleSeriesRemoved(QAbstractSeries *series)
|
|
|
{
|
|
|
foreach (LegendMarker *marker, m_markers) {
|
|
|
if (marker->series() == series) {
|
|
|
delete marker;
|
|
|
m_markers.removeAll(marker);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
if(series->type() == QAbstractSeries::SeriesTypePie)
|
|
|
{
|
|
|
QPieSeries *pieSeries = static_cast<QPieSeries *>(series);
|
|
|
QObject::disconnect(pieSeries, SIGNAL(added(QList<QPieSlice*>)), this, SLOT(handleUpdatePieSeries()));
|
|
|
QObject::disconnect(pieSeries, SIGNAL(removed(QList<QPieSlice*>)), this, SLOT(handleUpdatePieSeries()));
|
|
|
}
|
|
|
|
|
|
q_ptr->layout()->invalidate();
|
|
|
}
|
|
|
|
|
|
void QLegendPrivate::handleSeriesUpdated(QAbstractSeries *series)
|
|
|
{
|
|
|
// TODO: find out which markers are are added or removed. Update them
|
|
|
// TODO: better implementation
|
|
|
handleSeriesRemoved(series);
|
|
|
Domain domain;
|
|
|
handleSeriesAdded(series, &domain);
|
|
|
}
|
|
|
|
|
|
void QLegendPrivate::handleUpdatePieSeries()
|
|
|
{
|
|
|
//TODO: reimplement to be optimal
|
|
|
QPieSeries* series = qobject_cast<QPieSeries *> (sender());
|
|
|
Q_ASSERT(series);
|
|
|
handleSeriesRemoved(series);
|
|
|
handleSeriesAdded(series, 0);
|
|
|
}
|
|
|
|
|
|
void QLegendPrivate::handleSeriesVisibleChanged()
|
|
|
{
|
|
|
QAbstractSeries* series = qobject_cast<QAbstractSeries *> (sender());
|
|
|
|
|
|
foreach (LegendMarker* marker, m_markers) {
|
|
|
if (marker->series() == series) {
|
|
|
marker->setVisible(series->isVisible());
|
|
|
}
|
|
|
}
|
|
|
|
|
|
q_ptr->layout()->invalidate();
|
|
|
}
|
|
|
|
|
|
#include "moc_qlegend.cpp"
|
|
|
#include "moc_qlegend_p.cpp"
|
|
|
|
|
|
QTCOMMERCIALCHART_END_NAMESPACE
|
|
|
|
