|
|
/****************************************************************************
|
|
|
**
|
|
|
** Copyright (C) 2012 Digia Plc
|
|
|
** All rights reserved.
|
|
|
** For any questions to Digia, please use contact form at http://qt.digia.com
|
|
|
**
|
|
|
** This file is part of the Qt Commercial Charts Add-on.
|
|
|
**
|
|
|
** $QT_BEGIN_LICENSE$
|
|
|
** Licensees holding valid Qt Commercial licenses may use this file in
|
|
|
** accordance with the Qt Commercial License Agreement provided with the
|
|
|
** Software or, alternatively, in accordance with the terms contained in
|
|
|
** a written agreement between you and Digia.
|
|
|
**
|
|
|
** If you have questions regarding the use of this file, please use
|
|
|
** contact form at http://qt.digia.com
|
|
|
** $QT_END_LICENSE$
|
|
|
**
|
|
|
****************************************************************************/
|
|
|
|
|
|
#include "linechartitem_p.h"
|
|
|
#include "qlineseries.h"
|
|
|
#include "qlineseries_p.h"
|
|
|
#include "chartpresenter_p.h"
|
|
|
#include "abstractdomain_p.h"
|
|
|
#include <QPainter>
|
|
|
#include <QGraphicsSceneMouseEvent>
|
|
|
|
|
|
QTCOMMERCIALCHART_BEGIN_NAMESPACE
|
|
|
|
|
|
const qreal mouseEventMinWidth(12);
|
|
|
|
|
|
LineChartItem::LineChartItem(QLineSeries *series,QGraphicsItem* item)
|
|
|
: XYChart(series,item),
|
|
|
m_series(series),
|
|
|
m_pointsVisible(false)
|
|
|
{
|
|
|
setAcceptHoverEvents(true);
|
|
|
setZValue(ChartPresenter::LineChartZValue);
|
|
|
QObject::connect(series->d_func(), SIGNAL(updated()), this, SLOT(handleUpdated()));
|
|
|
QObject::connect(series, SIGNAL(visibleChanged()), this, SLOT(handleUpdated()));
|
|
|
QObject::connect(series, SIGNAL(opacityChanged()), this, SLOT(handleUpdated()));
|
|
|
handleUpdated();
|
|
|
}
|
|
|
|
|
|
QRectF LineChartItem::boundingRect() const
|
|
|
{
|
|
|
return m_rect;
|
|
|
}
|
|
|
|
|
|
QPainterPath LineChartItem::shape() const
|
|
|
{
|
|
|
return m_path;
|
|
|
}
|
|
|
|
|
|
void LineChartItem::updateGeometry()
|
|
|
{
|
|
|
m_points = geometryPoints();
|
|
|
|
|
|
if (m_points.size() == 0) {
|
|
|
prepareGeometryChange();
|
|
|
m_path = QPainterPath();
|
|
|
m_rect = QRect();
|
|
|
return;
|
|
|
}
|
|
|
|
|
|
QPainterPath linePath(m_points.at(0));
|
|
|
|
|
|
if (m_pointsVisible) {
|
|
|
|
|
|
int size = m_linePen.width();
|
|
|
linePath.addEllipse(m_points.at(0), size, size);
|
|
|
for (int i = 1; i < m_points.size(); i++) {
|
|
|
linePath.lineTo(m_points.at(i));
|
|
|
linePath.addEllipse(m_points.at(i), size, size);
|
|
|
linePath.moveTo(m_points.at(i));
|
|
|
}
|
|
|
|
|
|
} else {
|
|
|
for (int i = 1; i < m_points.size(); i++)
|
|
|
linePath.lineTo(m_points.at(i));
|
|
|
}
|
|
|
|
|
|
m_linePath = linePath;
|
|
|
|
|
|
QPainterPathStroker stroker;
|
|
|
// QPainter::drawLine does not respect join styles, for example BevelJoin becomes MiterJoin.
|
|
|
// This is why we are prepared for the "worst case" scenario, i.e. use always MiterJoin and
|
|
|
// multiply line width with square root of two when defining shape and bounding rectangle.
|
|
|
stroker.setWidth(m_linePen.width() * 1.42);
|
|
|
stroker.setJoinStyle(Qt::MiterJoin);
|
|
|
stroker.setCapStyle(Qt::SquareCap);
|
|
|
stroker.setMiterLimit(m_linePen.miterLimit());
|
|
|
|
|
|
prepareGeometryChange();
|
|
|
|
|
|
m_path = stroker.createStroke(linePath);
|
|
|
m_rect = m_path.boundingRect();
|
|
|
}
|
|
|
|
|
|
void LineChartItem::handleUpdated()
|
|
|
{
|
|
|
setVisible(m_series->isVisible());
|
|
|
setOpacity(m_series->opacity());
|
|
|
m_pointsVisible = m_series->pointsVisible();
|
|
|
m_linePen = m_series->pen();
|
|
|
update();
|
|
|
}
|
|
|
|
|
|
void LineChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
|
|
|
{
|
|
|
Q_UNUSED(widget)
|
|
|
Q_UNUSED(option)
|
|
|
|
|
|
painter->save();
|
|
|
painter->setPen(m_linePen);
|
|
|
painter->setBrush(m_linePen.color());
|
|
|
painter->setClipRect(QRectF(QPointF(0,0),domain()->size()));
|
|
|
|
|
|
if (m_pointsVisible) {
|
|
|
painter->drawPath(m_linePath);
|
|
|
} else {
|
|
|
for (int i(1); i < m_points.size(); i++)
|
|
|
painter->drawLine(m_points.at(i - 1), m_points.at(i));
|
|
|
}
|
|
|
painter->restore();
|
|
|
}
|
|
|
|
|
|
void LineChartItem::mousePressEvent(QGraphicsSceneMouseEvent *event)
|
|
|
{
|
|
|
emit XYChart::clicked(domain()->calculateDomainPoint(event->pos()));
|
|
|
QGraphicsItem::mousePressEvent(event);
|
|
|
}
|
|
|
|
|
|
void LineChartItem::hoverEnterEvent(QGraphicsSceneHoverEvent *event)
|
|
|
{
|
|
|
emit XYChart::hovered(domain()->calculateDomainPoint(event->pos()), true);
|
|
|
event->accept();
|
|
|
//QGraphicsItem::hoverEnterEvent(event);
|
|
|
}
|
|
|
|
|
|
void LineChartItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
|
|
|
{
|
|
|
emit XYChart::hovered(domain()->calculateDomainPoint(event->pos()), false);
|
|
|
event->accept();
|
|
|
//QGraphicsItem::hoverEnterEvent(event);
|
|
|
}
|
|
|
|
|
|
#include "moc_linechartitem_p.cpp"
|
|
|
|
|
|
QTCOMMERCIALCHART_END_NAMESPACE
|
|
|
|
