linechartitem.cpp
132 lines
| 3.8 KiB
| text/x-c
|
CppLexer
Jani Honkonen
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r794 | /**************************************************************************** | ||
| ** | ||||
| ** 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 | ||||
| ** $QT_END_LICENSE$ | ||||
| ** | ||||
| ****************************************************************************/ | ||||
Michal Klocek
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r144 | #include "linechartitem_p.h" | ||
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r349 | #include "qlineseries.h" | ||
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r938 | #include "qlineseries_p.h" | ||
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r131 | #include "chartpresenter_p.h" | ||
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r21 | #include <QPainter> | ||
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r1218 | #include <QGraphicsSceneMouseEvent> | ||
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r144 | |||
Tero Ahola
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r30 | QTCOMMERCIALCHART_BEGIN_NAMESPACE | ||
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r21 | |||
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r1792 | const qreal mouseEventMinWidth(12); | ||
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r150 | |||
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Tero Ahola
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r1346 | LineChartItem::LineChartItem(QLineSeries* series,ChartPresenter *presenter): | ||
| XYChart(series, presenter), | ||||
| QGraphicsItem(presenter ? presenter->rootItem() : 0), | ||||
| m_series(series), | ||||
| m_pointsVisible(false) | ||||
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r21 | { | ||
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r262 | setZValue(ChartPresenter::LineChartZValue); | ||
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r938 | QObject::connect(series->d_func(),SIGNAL(updated()),this,SLOT(handleUpdated())); | ||
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Tero Ahola
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r1342 | QObject::connect(series, SIGNAL(visibleChanged()), this, SLOT(handleUpdated())); | ||
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r439 | handleUpdated(); | ||
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r21 | } | ||
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Michal Klocek
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r144 | QRectF LineChartItem::boundingRect() const | ||
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Tero Ahola
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r103 | { | ||
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Michal Klocek
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r131 | return m_rect; | ||
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Tero Ahola
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r103 | } | ||
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Michal Klocek
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r85 | |||
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r144 | QPainterPath LineChartItem::shape() const | ||
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r67 | { | ||
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Tero Ahola
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r1791 | // Increase the size of the path slightly to make mouse interactions more natural | ||
| QPainterPathStroker s; | ||||
| s.setCapStyle(Qt::RoundCap); | ||||
| s.setJoinStyle(Qt::RoundJoin); | ||||
| qreal spacing = qMax(mouseEventMinWidth, (qreal) m_linePen.width()); | ||||
| s.setWidth(spacing); | ||||
| return s.createStroke(m_path); | ||||
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Michal Klocek
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r131 | } | ||
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r85 | |||
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r1217 | void LineChartItem::updateGeometry() | ||
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r131 | { | ||
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r1217 | const QVector<QPointF>& points = geometryPoints(); | ||
Marek Rosa
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r545 | if(points.size()==0) | ||
| { | ||||
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r1269 | prepareGeometryChange(); | ||
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Marek Rosa
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r1085 | m_path = QPainterPath(); | ||
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Michal Klocek
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r1269 | m_rect = QRect(); | ||
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Marek Rosa
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r545 | return; | ||
| } | ||||
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Michal Klocek
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r464 | |||
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r544 | QPainterPath linePath(points.at(0)); | ||
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r464 | |||
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r465 | for(int i=1; i< points.size();i++) { | ||
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r544 | linePath.lineTo(points.at(i)); | ||
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r465 | } | ||
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r464 | |||
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r465 | prepareGeometryChange(); | ||
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Tero Ahola
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r1791 | |||
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r544 | m_path = linePath; | ||
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Tero Ahola
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r1791 | |||
| // When defining bounding rectangle, | ||||
| // 1. take the line width into account (otherwise you will get drawing artifacts) and | ||||
| // 2. take the shape into account (otherwise you will not get mouse events through on border | ||||
| // areas). | ||||
| const qreal sqrtOf2 = 1.414214; | ||||
| const qreal spacing = qMax(mouseEventMinWidth / 2.0, | ||||
| sqrtOf2 * (qreal) m_linePen.width() / 2.0); | ||||
| m_rect = m_path.boundingRect().adjusted(-spacing, -spacing, spacing, spacing); | ||||
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Michal Klocek
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r1218 | setPos(origin()); | ||
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Michal Klocek
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r21 | } | ||
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Michal Klocek
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r392 | void LineChartItem::handleUpdated() | ||
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Michal Klocek
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r389 | { | ||
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Tero Ahola
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r1346 | setVisible(m_series->isVisible()); | ||
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r544 | m_pointsVisible = m_series->pointsVisible(); | ||
| m_linePen = m_series->pen(); | ||||
| m_pointPen = m_series->pen(); | ||||
| m_pointPen.setWidthF(2*m_pointPen.width()); | ||||
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Michal Klocek
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r139 | update(); | ||
| } | ||||
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Michal Klocek
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r391 | void LineChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) | ||
| { | ||||
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Tero Ahola
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r611 | Q_UNUSED(widget) | ||
| Q_UNUSED(option) | ||||
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Tero Ahola
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r1346 | painter->save(); | ||
| painter->setPen(m_linePen); | ||||
| painter->setClipRect(clipRect()); | ||||
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Tero Ahola
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r1780 | // Draw lines | ||
| const QVector<QPointF> &points = geometryPoints(); | ||||
| for (int i(1); i < points.size();i++) | ||||
| painter->drawLine(points.at(i-1), points.at(i)); | ||||
| // Draw points | ||||
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Tero Ahola
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r1346 | if (m_pointsVisible){ | ||
| painter->setPen(m_pointPen); | ||||
| painter->drawPoints(geometryPoints()); | ||||
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Michal Klocek
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r544 | } | ||
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Tero Ahola
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r1346 | painter->restore(); | ||
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Michal Klocek
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r391 | } | ||
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Michal Klocek
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r1218 | void LineChartItem::mousePressEvent(QGraphicsSceneMouseEvent *event) | ||
| { | ||||
| emit XYChart::clicked(calculateDomainPoint(event->pos())); | ||||
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Michal Klocek
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r1747 | QGraphicsItem::mousePressEvent(event); | ||
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r1218 | } | ||
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Michal Klocek
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r144 | #include "moc_linechartitem_p.cpp" | ||
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Michal Klocek
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r131 | |||
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Tero Ahola
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r30 | QTCOMMERCIALCHART_END_NAMESPACE | ||