polarchartaxisradial.cpp
301 lines
| 11.3 KiB
| text/x-c
|
CppLexer
Miikka Heikkinen
|
r2483 | /**************************************************************************** | ||
| ** | ||||
| ** Copyright (C) 2013 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 "polarchartaxisradial_p.h" | ||||
| #include "chartpresenter_p.h" | ||||
| #include "abstractchartlayout_p.h" | ||||
| #include "qabstractaxis_p.h" | ||||
| #include "linearrowitem_p.h" | ||||
| #include <QFontMetrics> | ||||
| QTCOMMERCIALCHART_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(); | ||||
| QGraphicsSimpleTextItem* 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); | ||||
| QFontMetrics fn(axis()->labelsFont()); | ||||
| 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)); | ||||
| QGraphicsSimpleTextItem *labelItem = static_cast<QGraphicsSimpleTextItem *>(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) | ||||
|
Miikka Heikkinen
|
r2504 | labelCoordinate = qMax(qreal(0.0), labelCoordinate); | ||
|
Miikka Heikkinen
|
r2483 | |||
| labelCoordinate = (labelCoordinate + farEdge) / 2.0; | ||||
| if (labelCoordinate > 0.0 && labelCoordinate < radius) | ||||
| labelVisible = true; | ||||
| else | ||||
| labelVisible = false; | ||||
| } | ||||
| // Radial axis label | ||||
| if (axis()->labelsVisible() && labelVisible) { | ||||
| labelItem->setText(labelList.at(i)); | ||||
| QRectF labelRect = labelItem->boundingRect(); | ||||
| QPointF labelCenter = labelRect.center(); | ||||
| labelItem->setTransformOriginPoint(labelCenter.x(), labelCenter.y()); | ||||
| QRectF boundingRect = labelBoundingRect(fn, labelList.at(i)); | ||||
| 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()) { | ||||
| QFontMetrics titleMetrics(axis()->titleFont()); | ||||
| if (titleMetrics.boundingRect(titleText).width() > radius) { | ||||
| QString string = titleText + "..."; | ||||
| while (titleMetrics.boundingRect(string).width() > radius && string.length() > 3) | ||||
| string.remove(string.length() - 4, 1); | ||||
| title->setText(string); | ||||
| } else { | ||||
| title->setText(titleText); | ||||
| } | ||||
| QRectF titleBoundingRect; | ||||
| titleBoundingRect = title->boundingRect(); | ||||
| QPointF titleCenter = titleBoundingRect.center(); | ||||
| QPointF arrowCenter = axisLine->boundingRect().center(); | ||||
| QPointF titleCenterDiff = arrowCenter - titleCenter; | ||||
| title->setPos(titleCenterDiff.x() - qreal(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); | ||||
| } | ||||
| for (int i = 0; i < count; ++i) { | ||||
| QGraphicsLineItem *arrow = new QGraphicsLineItem(presenter()->rootItem()); | ||||
| QGraphicsEllipseItem *grid = new QGraphicsEllipseItem(presenter()->rootItem()); | ||||
| QGraphicsSimpleTextItem *label = new QGraphicsSimpleTextItem(presenter()->rootItem()); | ||||
| QGraphicsSimpleTextItem *title = titleItem(); | ||||
| arrow->setPen(axis()->linePen()); | ||||
| grid->setPen(axis()->gridLinePen()); | ||||
| label->setFont(axis()->labelsFont()); | ||||
| label->setPen(axis()->labelsPen()); | ||||
| label->setBrush(axis()->labelsBrush()); | ||||
| label->setRotation(axis()->labelsAngle()); | ||||
| title->setFont(axis()->titleFont()); | ||||
| title->setPen(axis()->titlePen()); | ||||
| title->setBrush(axis()->titleBrush()); | ||||
| title->setText(axis()->titleText()); | ||||
| 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" | ||||
| QTCOMMERCIALCHART_END_NAMESPACE | ||||