linechartitem.cpp
168 lines
| 5.1 KiB
| text/x-c
|
CppLexer
Jani Honkonen
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r794 | /**************************************************************************** | ||
| ** | ||||
Miikka Heikkinen
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r2432 | ** Copyright (C) 2013 Digia Plc | ||
|
Jani Honkonen
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r794 | ** 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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Michal Klocek
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r349 | #include "qlineseries.h" | ||
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Michal Klocek
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r938 | #include "qlineseries_p.h" | ||
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Michal Klocek
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r131 | #include "chartpresenter_p.h" | ||
Marek Rosa
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r2275 | #include "abstractdomain_p.h" | ||
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Michal Klocek
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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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Tero Ahola
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r1792 | const qreal mouseEventMinWidth(12); | ||
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r150 | |||
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Michal Klocek
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r2273 | LineChartItem::LineChartItem(QLineSeries *series,QGraphicsItem* item) | ||
| : XYChart(series,item), | ||||
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Jani Honkonen
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r2097 | m_series(series), | ||
| m_pointsVisible(false) | ||||
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Michal Klocek
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r21 | { | ||
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Marek Rosa
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r2255 | setAcceptHoverEvents(true); | ||
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Michal Klocek
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r262 | setZValue(ChartPresenter::LineChartZValue); | ||
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Jani Honkonen
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r2097 | 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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Tero Ahola
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r2067 | QObject::connect(series, SIGNAL(opacityChanged()), this, SLOT(handleUpdated())); | ||
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Michal Klocek
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r439 | handleUpdated(); | ||
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Michal Klocek
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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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Jani Honkonen
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r2097 | 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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Michal Klocek
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r144 | QPainterPath LineChartItem::shape() const | ||
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Michal Klocek
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r67 | { | ||
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Michal Klocek
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r1819 | return m_path; | ||
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Michal Klocek
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r131 | } | ||
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Michal Klocek
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r85 | |||
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Michal Klocek
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r1217 | void LineChartItem::updateGeometry() | ||
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Michal Klocek
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r131 | { | ||
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Michal Klocek
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r1819 | m_points = geometryPoints(); | ||
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r1217 | |||
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Jani Honkonen
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r2097 | if (m_points.size() == 0) { | ||
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Michal Klocek
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r1269 | prepareGeometryChange(); | ||
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Marek Rosa
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r1085 | m_path = QPainterPath(); | ||
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Miikka Heikkinen
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r2451 | m_linePath = 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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r1819 | QPainterPath linePath(m_points.at(0)); | ||
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r464 | |||
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r2097 | if (m_pointsVisible) { | ||
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Michal Klocek
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r1819 | |||
| int size = m_linePen.width(); | ||||
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Jani Honkonen
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r2097 | linePath.addEllipse(m_points.at(0), size, size); | ||
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Miikka Heikkinen
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r2451 | linePath.moveTo(m_points.at(0)); | ||
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Jani Honkonen
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r2097 | for (int i = 1; i < m_points.size(); i++) { | ||
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r1819 | linePath.lineTo(m_points.at(i)); | ||
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r2097 | linePath.addEllipse(m_points.at(i), size, size); | ||
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Marek Rosa
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r2259 | linePath.moveTo(m_points.at(i)); | ||
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Michal Klocek
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r1819 | } | ||
| } else { | ||||
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Jani Honkonen
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r2097 | for (int i = 1; i < m_points.size(); i++) | ||
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r1819 | linePath.lineTo(m_points.at(i)); | ||
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Michal Klocek
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r465 | } | ||
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Michal Klocek
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r464 | |||
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Tero Ahola
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r1823 | m_linePath = linePath; | ||
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Michal Klocek
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r1819 | QPainterPathStroker stroker; | ||
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Tero Ahola
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r1823 | // 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); | ||||
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Michal Klocek
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r1821 | stroker.setMiterLimit(m_linePen.miterLimit()); | ||
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Tero Ahola
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r1791 | |||
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r1819 | prepareGeometryChange(); | ||
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Tero Ahola
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r1791 | |||
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r1819 | m_path = stroker.createStroke(linePath); | ||
| m_rect = m_path.boundingRect(); | ||||
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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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Miikka Heikkinen
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r2451 | // If points visiblity has changed, a geometry update is needed. | ||
| // Also, if pen changes when points are visible, geometry update is needed. | ||||
| bool doGeometryUpdate = | ||||
| (m_pointsVisible != m_series->pointsVisible()) | ||||
| || (m_series->pointsVisible() && (m_linePen != m_series->pen())); | ||||
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Tero Ahola
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r1346 | setVisible(m_series->isVisible()); | ||
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Tero Ahola
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r2067 | setOpacity(m_series->opacity()); | ||
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Michal Klocek
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r544 | m_pointsVisible = m_series->pointsVisible(); | ||
| m_linePen = m_series->pen(); | ||||
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Miikka Heikkinen
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r2451 | if (doGeometryUpdate) | ||
| updateGeometry(); | ||||
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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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r1828 | painter->save(); | ||
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Tero Ahola
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r1346 | painter->setPen(m_linePen); | ||
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Michal Klocek
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r2273 | painter->setClipRect(QRectF(QPointF(0,0),domain()->size())); | ||
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Michal Klocek
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r1819 | |||
| if (m_pointsVisible) { | ||||
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Miikka Heikkinen
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r2457 | painter->setBrush(m_linePen.color()); | ||
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Michal Klocek
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r1819 | painter->drawPath(m_linePath); | ||
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Jani Honkonen
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r2097 | } else { | ||
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Miikka Heikkinen
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r2457 | painter->setBrush(QBrush(Qt::NoBrush)); | ||
| if (m_linePen.style() != Qt::SolidLine) { | ||||
| // If pen style is not solid line, always fall back to path painting | ||||
| // to ensure proper continuity of the pattern | ||||
| 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)); | ||||
| } | ||||
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Michal Klocek
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r544 | } | ||
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Miikka Heikkinen
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r2457 | |||
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Tero Ahola
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r1828 | 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) | ||
| { | ||||
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Michal Klocek
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r2273 | emit XYChart::clicked(domain()->calculateDomainPoint(event->pos())); | ||
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Michal Klocek
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r1747 | QGraphicsItem::mousePressEvent(event); | ||
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Michal Klocek
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r1218 | } | ||
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Marek Rosa
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r2255 | void LineChartItem::hoverEnterEvent(QGraphicsSceneHoverEvent *event) | ||
| { | ||||
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Michal Klocek
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r2273 | emit XYChart::hovered(domain()->calculateDomainPoint(event->pos()), true); | ||
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Marek Rosa
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r2356 | // event->accept(); | ||
| QGraphicsItem::hoverEnterEvent(event); | ||||
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Marek Rosa
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r2255 | } | ||
| void LineChartItem::hoverLeaveEvent(QGraphicsSceneHoverEvent *event) | ||||
| { | ||||
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Michal Klocek
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r2273 | emit XYChart::hovered(domain()->calculateDomainPoint(event->pos()), false); | ||
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Marek Rosa
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r2356 | // event->accept(); | ||
| QGraphicsItem::hoverEnterEvent(event); | ||||
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Marek Rosa
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r2255 | } | ||
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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 | ||