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Diffstat (limited to 'src/charts/axis/polarchartaxisradial.cpp')
| -rw-r--r-- | src/charts/axis/polarchartaxisradial.cpp | 297 |
1 files changed, 297 insertions, 0 deletions
diff --git a/src/charts/axis/polarchartaxisradial.cpp b/src/charts/axis/polarchartaxisradial.cpp new file mode 100644 index 00000000..93bf1bd9 --- /dev/null +++ b/src/charts/axis/polarchartaxisradial.cpp @@ -0,0 +1,297 @@ +/**************************************************************************** +** +** 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 "polarchartaxisradial_p.h" +#include "chartpresenter_p.h" +#include "abstractchartlayout_p.h" +#include "qabstractaxis_p.h" +#include "linearrowitem_p.h" +#include <QTextDocument> + +QT_CHARTS_BEGIN_NAMESPACE + +PolarChartAxisRadial::PolarChartAxisRadial(QAbstractAxis *axis, QGraphicsItem *item, bool intervalAxis) + : PolarChartAxis(axis, item, intervalAxis) +{ +} + +PolarChartAxisRadial::~PolarChartAxisRadial() +{ +} + +void PolarChartAxisRadial::updateGeometry() +{ + const QVector<qreal> &layout = this->layout(); + if (layout.isEmpty()) + return; + + createAxisLabels(layout); + QStringList labelList = labels(); + QPointF center = axisGeometry().center(); + QList<QGraphicsItem *> arrowItemList = arrowItems(); + QList<QGraphicsItem *> gridItemList = gridItems(); + QList<QGraphicsItem *> labelItemList = labelItems(); + QList<QGraphicsItem *> shadeItemList = shadeItems(); + QGraphicsTextItem* title = titleItem(); + qreal radius = axisGeometry().height() / 2.0; + + QLineF line(center, center + QPointF(0, -radius)); + QGraphicsLineItem *axisLine = static_cast<QGraphicsLineItem *>(arrowItemList.at(0)); + axisLine->setLine(line); + + QRectF previousLabelRect; + bool firstShade = true; + bool nextTickVisible = false; + if (layout.size()) + nextTickVisible = !(layout.at(0) < 0.0 || layout.at(0) > radius); + + for (int i = 0; i < layout.size(); ++i) { + qreal radialCoordinate = layout.at(i); + + QGraphicsEllipseItem *gridItem = static_cast<QGraphicsEllipseItem *>(gridItemList.at(i)); + QGraphicsLineItem *tickItem = static_cast<QGraphicsLineItem *>(arrowItemList.at(i + 1)); + QGraphicsTextItem *labelItem = static_cast<QGraphicsTextItem *>(labelItemList.at(i)); + QGraphicsPathItem *shadeItem = 0; + if (i == 0) + shadeItem = static_cast<QGraphicsPathItem *>(shadeItemList.at(0)); + else if (i % 2) + shadeItem = static_cast<QGraphicsPathItem *>(shadeItemList.at((i / 2) + 1)); + + // Ignore ticks outside valid range + bool currentTickVisible = nextTickVisible; + if ((i == layout.size() - 1) + || layout.at(i + 1) < 0.0 + || layout.at(i + 1) > radius) { + nextTickVisible = false; + } else { + nextTickVisible = true; + } + + qreal labelCoordinate = radialCoordinate; + qreal labelVisible = currentTickVisible; + qreal labelPad = labelPadding() / 2.0; + if (intervalAxis()) { + qreal farEdge; + if (i == (layout.size() - 1)) + farEdge = radius; + else + farEdge = qMin(radius, layout.at(i + 1)); + + // Adjust the labelCoordinate to show it if next tick is visible + if (nextTickVisible) + labelCoordinate = qMax(qreal(0.0), labelCoordinate); + + labelCoordinate = (labelCoordinate + farEdge) / 2.0; + if (labelCoordinate > 0.0 && labelCoordinate < radius) + labelVisible = true; + else + labelVisible = false; + } + + // Radial axis label + if (axis()->labelsVisible() && labelVisible) { + QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(), + labelList.at(i), + axis()->labelsAngle()); + labelItem->setTextWidth(boundingRect.width()); + labelItem->setHtml(labelList.at(i)); + QRectF labelRect = labelItem->boundingRect(); + QPointF labelCenter = labelRect.center(); + labelItem->setTransformOriginPoint(labelCenter.x(), labelCenter.y()); + boundingRect.moveCenter(labelCenter); + QPointF positionDiff(labelRect.topLeft() - boundingRect.topLeft()); + QPointF labelPoint = center; + if (intervalAxis()) + labelPoint += QPointF(labelPad, -labelCoordinate - (boundingRect.height() / 2.0)); + else + labelPoint += QPointF(labelPad, labelPad - labelCoordinate); + labelRect.moveTopLeft(labelPoint); + labelItem->setPos(labelRect.topLeft() + positionDiff); + + // Label overlap detection + labelRect.setSize(boundingRect.size()); + if ((i && previousLabelRect.intersects(labelRect)) + || !axisGeometry().contains(labelRect)) { + labelVisible = false; + } else { + previousLabelRect = labelRect; + labelVisible = true; + } + } + + labelItem->setVisible(labelVisible); + if (!currentTickVisible) { + gridItem->setVisible(false); + tickItem->setVisible(false); + if (shadeItem) + shadeItem->setVisible(false); + continue; + } + + // Radial grid line + QRectF gridRect; + gridRect.setWidth(radialCoordinate * 2.0); + gridRect.setHeight(radialCoordinate * 2.0); + gridRect.moveCenter(center); + + gridItem->setRect(gridRect); + gridItem->setVisible(true); + + // Tick + QLineF tickLine(-tickWidth(), 0.0, tickWidth(), 0.0); + tickLine.translate(center.rx(), gridRect.top()); + tickItem->setLine(tickLine); + tickItem->setVisible(true); + + // Shades + if (i % 2 || (i == 0 && !nextTickVisible)) { + QPainterPath path; + if (i == 0) { + // If first tick is also the last, we need to custom fill the inner circle + // or it won't get filled. + QRectF innerCircle(0.0, 0.0, layout.at(0) * 2.0, layout.at(0) * 2.0); + innerCircle.moveCenter(center); + path.addEllipse(innerCircle); + } else { + QRectF otherGridRect; + if (!nextTickVisible) { // Last visible tick + otherGridRect = axisGeometry(); + } else { + qreal otherGridRectDimension = layout.at(i + 1) * 2.0; + otherGridRect.setWidth(otherGridRectDimension); + otherGridRect.setHeight(otherGridRectDimension); + otherGridRect.moveCenter(center); + } + path.addEllipse(gridRect); + path.addEllipse(otherGridRect); + + // Add additional shading in first visible shade item if there is a partial tick + // to be filled at the center (log & category axes) + if (firstShade) { + QGraphicsPathItem *specialShadeItem = static_cast<QGraphicsPathItem *>(shadeItemList.at(0)); + if (layout.at(i - 1) > 0.0) { + QRectF innerCircle(0.0, 0.0, layout.at(i - 1) * 2.0, layout.at(i - 1) * 2.0); + innerCircle.moveCenter(center); + QPainterPath specialPath; + specialPath.addEllipse(innerCircle); + specialShadeItem->setPath(specialPath); + specialShadeItem->setVisible(true); + } else { + specialShadeItem->setVisible(false); + } + } + } + shadeItem->setPath(path); + shadeItem->setVisible(true); + firstShade = false; + } + } + + // Title, along the 0 axis + QString titleText = axis()->titleText(); + if (!titleText.isEmpty() && axis()->isTitleVisible()) { + QRectF truncatedRect; + title->setHtml(ChartPresenter::truncatedText(axis()->titleFont(), titleText, qreal(0.0), + radius, radius, truncatedRect)); + title->setTextWidth(truncatedRect.width()); + + QRectF titleBoundingRect = title->boundingRect(); + QPointF titleCenter = titleBoundingRect.center(); + QPointF arrowCenter = axisLine->boundingRect().center(); + QPointF titleCenterDiff = arrowCenter - titleCenter; + title->setPos(titleCenterDiff.x() - titlePadding() - (titleBoundingRect.height() / 2.0), titleCenterDiff.y()); + title->setTransformOriginPoint(titleCenter); + title->setRotation(270.0); + } + + QGraphicsLayoutItem::updateGeometry(); +} + +Qt::Orientation PolarChartAxisRadial::orientation() const +{ + return Qt::Vertical; +} + +void PolarChartAxisRadial::createItems(int count) +{ + if (arrowItems().count() == 0) { + // radial axis center line + QGraphicsLineItem *arrow = new LineArrowItem(this, presenter()->rootItem()); + arrow->setPen(axis()->linePen()); + arrowGroup()->addToGroup(arrow); + } + + QGraphicsTextItem *title = titleItem(); + title->setFont(axis()->titleFont()); + title->setDefaultTextColor(axis()->titleBrush().color()); + title->setHtml(axis()->titleText()); + + for (int i = 0; i < count; ++i) { + QGraphicsLineItem *arrow = new QGraphicsLineItem(presenter()->rootItem()); + QGraphicsEllipseItem *grid = new QGraphicsEllipseItem(presenter()->rootItem()); + QGraphicsTextItem *label = new QGraphicsTextItem(presenter()->rootItem()); + label->document()->setDocumentMargin(ChartPresenter::textMargin()); + arrow->setPen(axis()->linePen()); + grid->setPen(axis()->gridLinePen()); + label->setFont(axis()->labelsFont()); + label->setDefaultTextColor(axis()->labelsBrush().color()); + label->setRotation(axis()->labelsAngle()); + arrowGroup()->addToGroup(arrow); + gridGroup()->addToGroup(grid); + labelGroup()->addToGroup(label); + if (gridItems().size() == 1 || (((gridItems().size() + 1) % 2) && gridItems().size() > 0)) { + QGraphicsPathItem *shade = new QGraphicsPathItem(presenter()->rootItem()); + shade->setPen(axis()->shadesPen()); + shade->setBrush(axis()->shadesBrush()); + shadeGroup()->addToGroup(shade); + } + } +} + +void PolarChartAxisRadial::handleArrowPenChanged(const QPen &pen) +{ + foreach (QGraphicsItem *item, arrowItems()) + static_cast<QGraphicsLineItem *>(item)->setPen(pen); +} + +void PolarChartAxisRadial::handleGridPenChanged(const QPen &pen) +{ + foreach (QGraphicsItem *item, gridItems()) + static_cast<QGraphicsEllipseItem *>(item)->setPen(pen); +} + +QSizeF PolarChartAxisRadial::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const +{ + Q_UNUSED(which); + Q_UNUSED(constraint); + return QSizeF(-1.0, -1.0); +} + +qreal PolarChartAxisRadial::preferredAxisRadius(const QSizeF &maxSize) +{ + qreal radius = maxSize.height() / 2.0; + if (maxSize.width() < maxSize.height()) + radius = maxSize.width() / 2.0; + return radius; +} + +#include "moc_polarchartaxisradial_p.cpp" + +QT_CHARTS_END_NAMESPACE |