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Diffstat (limited to 'src/linechart/linechartitem.cpp')
| -rw-r--r-- | src/linechart/linechartitem.cpp | 405 |
1 files changed, 0 insertions, 405 deletions
diff --git a/src/linechart/linechartitem.cpp b/src/linechart/linechartitem.cpp deleted file mode 100644 index da7c0c50..00000000 --- a/src/linechart/linechartitem.cpp +++ /dev/null @@ -1,405 +0,0 @@ -/**************************************************************************** -** -** Copyright (C) 2014 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 Enterprise Charts Add-on. -** -** $QT_BEGIN_LICENSE$ -** Licensees holding valid Qt Enterprise licenses may use this file in -** accordance with the Qt Enterprise 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 "polardomain_p.h" -#include "chartthememanager_p.h" -#include "charttheme_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), - m_chartType(QChart::ChartTypeUndefined), - m_pointLabelsVisible(false), - m_pointLabelsFormat(series->pointLabelsFormat()), - m_pointLabelsFont(series->pointLabelsFont()), - m_pointLabelsColor(series->pointLabelsColor()) -{ - 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())); - QObject::connect(series, SIGNAL(pointLabelsFormatChanged(QString)), - this, SLOT(handleUpdated())); - QObject::connect(series, SIGNAL(pointLabelsVisibilityChanged(bool)), - this, SLOT(handleUpdated())); - QObject::connect(series, SIGNAL(pointLabelsFontChanged(QFont)), this, SLOT(handleUpdated())); - QObject::connect(series, SIGNAL(pointLabelsColorChanged(QColor)), this, SLOT(handleUpdated())); - handleUpdated(); -} - -QRectF LineChartItem::boundingRect() const -{ - return m_rect; -} - -QPainterPath LineChartItem::shape() const -{ - return m_shapePath; -} - -void LineChartItem::updateGeometry() -{ - m_points = geometryPoints(); - const QVector<QPointF> &points = m_points; - - if (points.size() == 0) { - prepareGeometryChange(); - m_fullPath = QPainterPath(); - m_linePath = QPainterPath(); - m_rect = QRect(); - return; - } - - QPainterPath linePath; - QPainterPath fullPath; - // Use worst case scenario to determine required margin. - qreal margin = m_linePen.width() * 1.42; - - // Area series use component line series that aren't necessarily added to the chart themselves, - // so check if chart type is forced before trying to obtain it from the chart. - QChart::ChartType chartType = m_chartType; - if (chartType == QChart::ChartTypeUndefined) - chartType = m_series->chart()->chartType(); - - // For polar charts, we need special handling for angular (horizontal) - // points that are off-grid. - if (chartType == QChart::ChartTypePolar) { - QPainterPath linePathLeft; - QPainterPath linePathRight; - QPainterPath *currentSegmentPath = 0; - QPainterPath *previousSegmentPath = 0; - qreal minX = domain()->minX(); - qreal maxX = domain()->maxX(); - qreal minY = domain()->minY(); - QPointF currentSeriesPoint = m_series->at(0); - QPointF currentGeometryPoint = points.at(0); - QPointF previousGeometryPoint = points.at(0); - int size = m_linePen.width(); - bool pointOffGrid = false; - bool previousPointWasOffGrid = (currentSeriesPoint.x() < minX || currentSeriesPoint.x() > maxX); - - qreal domainRadius = domain()->size().height() / 2.0; - const QPointF centerPoint(domainRadius, domainRadius); - - if (!previousPointWasOffGrid) { - fullPath.moveTo(points.at(0)); - if (m_pointsVisible && currentSeriesPoint.y() >= minY) { - // Do not draw ellipses for points below minimum Y. - linePath.addEllipse(points.at(0), size, size); - fullPath.addEllipse(points.at(0), size, size); - linePath.moveTo(points.at(0)); - fullPath.moveTo(points.at(0)); - } - } - - qreal leftMarginLine = centerPoint.x() - margin; - qreal rightMarginLine = centerPoint.x() + margin; - qreal horizontal = centerPoint.y(); - - // See ScatterChartItem::updateGeometry() for explanation why seriesLastIndex is needed - const int seriesLastIndex = m_series->count() - 1; - - for (int i = 1; i < points.size(); i++) { - // Interpolating line fragments would be ugly when thick pen is used, - // so we work around it by utilizing three separate - // paths for line segments and clip those with custom regions at paint time. - // "Right" path contains segments that cross the axis line with visible point on the - // right side of the axis line, as well as segments that have one point within the margin - // on the right side of the axis line and another point on the right side of the chart. - // "Left" path contains points with similarly on the left side. - // "Full" path contains rest of the points. - // This doesn't yield perfect results always. E.g. when segment covers more than 90 - // degrees and both of the points are within the margin, one in the top half and one in the - // bottom half of the chart, the bottom one gets clipped incorrectly. - // However, this should be rare occurrence in any sensible chart. - currentSeriesPoint = m_series->at(qMin(seriesLastIndex, i)); - currentGeometryPoint = points.at(i); - pointOffGrid = (currentSeriesPoint.x() < minX || currentSeriesPoint.x() > maxX); - - // Draw something unless both off-grid - if (!pointOffGrid || !previousPointWasOffGrid) { - QPointF intersectionPoint; - qreal y; - if (pointOffGrid != previousPointWasOffGrid) { - if (currentGeometryPoint.x() == previousGeometryPoint.x()) { - y = currentGeometryPoint.y() + (currentGeometryPoint.y() - previousGeometryPoint.y()) / 2.0; - } else { - qreal ratio = (centerPoint.x() - currentGeometryPoint.x()) / (currentGeometryPoint.x() - previousGeometryPoint.x()); - y = currentGeometryPoint.y() + (currentGeometryPoint.y() - previousGeometryPoint.y()) * ratio; - } - intersectionPoint = QPointF(centerPoint.x(), y); - } - - bool dummyOk; // We know points are ok, but this is needed - qreal currentAngle = static_cast<PolarDomain *>(domain())->toAngularCoordinate(currentSeriesPoint.x(), dummyOk); - qreal previousAngle = static_cast<PolarDomain *>(domain())->toAngularCoordinate(m_series->at(i - 1).x(), dummyOk); - - if ((qAbs(currentAngle - previousAngle) > 180.0)) { - // If the angle between two points is over 180 degrees (half X range), - // any direct segment between them becomes meaningless. - // In this case two line segments are drawn instead, from previous - // point to the center and from center to current point. - if ((previousAngle < 0.0 || (previousAngle <= 180.0 && previousGeometryPoint.x() < rightMarginLine)) - && previousGeometryPoint.y() < horizontal) { - currentSegmentPath = &linePathRight; - } else if ((previousAngle > 360.0 || (previousAngle > 180.0 && previousGeometryPoint.x() > leftMarginLine)) - && previousGeometryPoint.y() < horizontal) { - currentSegmentPath = &linePathLeft; - } else if (previousAngle > 0.0 && previousAngle < 360.0) { - currentSegmentPath = &linePath; - } else { - currentSegmentPath = 0; - } - - if (currentSegmentPath) { - if (previousSegmentPath != currentSegmentPath) - currentSegmentPath->moveTo(previousGeometryPoint); - if (previousPointWasOffGrid) - fullPath.moveTo(intersectionPoint); - - currentSegmentPath->lineTo(centerPoint); - fullPath.lineTo(centerPoint); - } - - previousSegmentPath = currentSegmentPath; - - if ((currentAngle < 0.0 || (currentAngle <= 180.0 && currentGeometryPoint.x() < rightMarginLine)) - && currentGeometryPoint.y() < horizontal) { - currentSegmentPath = &linePathRight; - } else if ((currentAngle > 360.0 || (currentAngle > 180.0 &¤tGeometryPoint.x() > leftMarginLine)) - && currentGeometryPoint.y() < horizontal) { - currentSegmentPath = &linePathLeft; - } else if (currentAngle > 0.0 && currentAngle < 360.0) { - currentSegmentPath = &linePath; - } else { - currentSegmentPath = 0; - } - - if (currentSegmentPath) { - if (previousSegmentPath != currentSegmentPath) - currentSegmentPath->moveTo(centerPoint); - if (!previousSegmentPath) - fullPath.moveTo(centerPoint); - - currentSegmentPath->lineTo(currentGeometryPoint); - if (pointOffGrid) - fullPath.lineTo(intersectionPoint); - else - fullPath.lineTo(currentGeometryPoint); - } - } else { - if (previousAngle < 0.0 || currentAngle < 0.0 - || ((previousAngle <= 180.0 && currentAngle <= 180.0) - && ((previousGeometryPoint.x() < rightMarginLine && previousGeometryPoint.y() < horizontal) - || (currentGeometryPoint.x() < rightMarginLine && currentGeometryPoint.y() < horizontal)))) { - currentSegmentPath = &linePathRight; - } else if (previousAngle > 360.0 || currentAngle > 360.0 - || ((previousAngle > 180.0 && currentAngle > 180.0) - && ((previousGeometryPoint.x() > leftMarginLine && previousGeometryPoint.y() < horizontal) - || (currentGeometryPoint.x() > leftMarginLine && currentGeometryPoint.y() < horizontal)))) { - currentSegmentPath = &linePathLeft; - } else { - currentSegmentPath = &linePath; - } - - if (currentSegmentPath != previousSegmentPath) - currentSegmentPath->moveTo(previousGeometryPoint); - if (previousPointWasOffGrid) - fullPath.moveTo(intersectionPoint); - - if (pointOffGrid) - fullPath.lineTo(intersectionPoint); - else - fullPath.lineTo(currentGeometryPoint); - currentSegmentPath->lineTo(currentGeometryPoint); - } - } else { - currentSegmentPath = 0; - } - - previousPointWasOffGrid = pointOffGrid; - if (m_pointsVisible && !pointOffGrid && currentSeriesPoint.y() >= minY) { - linePath.addEllipse(points.at(i), size, size); - fullPath.addEllipse(points.at(i), size, size); - linePath.moveTo(points.at(i)); - fullPath.moveTo(points.at(i)); - } - previousSegmentPath = currentSegmentPath; - previousGeometryPoint = currentGeometryPoint; - } - m_linePathPolarRight = linePathRight; - m_linePathPolarLeft = linePathLeft; - // Note: This construction of m_fullpath is not perfect. The partial segments that are - // outside left/right clip regions at axis boundary still generate hover/click events, - // because shape doesn't get clipped. It doesn't seem possible to do sensibly. - } else { // not polar - linePath.moveTo(points.at(0)); - if (m_pointsVisible) { - int size = m_linePen.width(); - linePath.addEllipse(points.at(0), size, size); - linePath.moveTo(points.at(0)); - for (int i = 1; i < points.size(); i++) { - linePath.lineTo(points.at(i)); - linePath.addEllipse(points.at(i), size, size); - linePath.moveTo(points.at(i)); - } - } else { - for (int i = 1; i < points.size(); i++) - linePath.lineTo(points.at(i)); - } - fullPath = 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(margin); - stroker.setJoinStyle(Qt::MiterJoin); - stroker.setCapStyle(Qt::SquareCap); - stroker.setMiterLimit(m_linePen.miterLimit()); - - QPainterPath checkShapePath = stroker.createStroke(fullPath); - - // Only zoom in if the bounding rects of the paths fit inside int limits. QWidget::update() uses - // a region that has to be compatible with QRect. - if (checkShapePath.boundingRect().height() <= INT_MAX - && checkShapePath.boundingRect().width() <= INT_MAX - && linePath.boundingRect().height() <= INT_MAX - && linePath.boundingRect().width() <= INT_MAX - && fullPath.boundingRect().height() <= INT_MAX - && fullPath.boundingRect().width() <= INT_MAX) { - prepareGeometryChange(); - - m_linePath = linePath; - m_fullPath = fullPath; - m_shapePath = checkShapePath; - - m_rect = m_shapePath.boundingRect(); - } else { - update(); - } -} - -void LineChartItem::handleUpdated() -{ - // If points visibility 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())); - setVisible(m_series->isVisible()); - setOpacity(m_series->opacity()); - m_pointsVisible = m_series->pointsVisible(); - m_linePen = m_series->pen(); - m_pointLabelsFormat = m_series->pointLabelsFormat(); - m_pointLabelsVisible = m_series->pointLabelsVisible(); - m_pointLabelsFont = m_series->pointLabelsFont(); - m_pointLabelsColor = m_series->pointLabelsColor(); - if (doGeometryUpdate) - updateGeometry(); - update(); -} - -void LineChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget) -{ - Q_UNUSED(widget) - Q_UNUSED(option) - - QRectF clipRect = QRectF(QPointF(0, 0), domain()->size()); - - painter->save(); - painter->setPen(m_linePen); - bool alwaysUsePath = false; - - if (m_series->chart()->chartType() == QChart::ChartTypePolar) { - qreal halfWidth = domain()->size().width() / 2.0; - QRectF clipRectLeft = QRectF(0, 0, halfWidth, domain()->size().height()); - QRectF clipRectRight = QRectF(halfWidth, 0, halfWidth, domain()->size().height()); - QRegion fullPolarClipRegion(clipRect.toRect(), QRegion::Ellipse); - QRegion clipRegionLeft(fullPolarClipRegion.intersected(clipRectLeft.toRect())); - QRegion clipRegionRight(fullPolarClipRegion.intersected(clipRectRight.toRect())); - painter->setClipRegion(clipRegionLeft); - painter->drawPath(m_linePathPolarLeft); - painter->setClipRegion(clipRegionRight); - painter->drawPath(m_linePathPolarRight); - painter->setClipRegion(fullPolarClipRegion); - alwaysUsePath = true; // required for proper clipping - } else { - painter->setClipRect(clipRect); - } - - if (m_pointsVisible) { - painter->setBrush(m_linePen.color()); - painter->drawPath(m_linePath); - } else { - painter->setBrush(QBrush(Qt::NoBrush)); - if (m_linePen.style() != Qt::SolidLine || alwaysUsePath) { - // 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)); - } - } - - if (m_pointLabelsVisible) - m_series->d_func()->drawSeriesPointLabels(painter, m_points, m_linePen.width() / 2); - - 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 |