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/****************************************************************************
**
** Copyright (C) 2015 The Qt Company Ltd
** All rights reserved.
** For any questions to The Qt Company, please use contact form at http://qt.io
**
** This file is part of the Qt Charts module.
**
** Licensees holding valid commercial license for Qt may use this file in
** accordance with the Qt License Agreement provided with the Software
** or, alternatively, in accordance with the terms contained in a written
** agreement between you and The Qt Company.
**
** If you have questions regarding the use of this file, please use
** contact form at http://qt.io
**
****************************************************************************/
#include <private/polarchartaxisradial_p.h>
#include <private/chartpresenter_p.h>
#include <private/abstractchartlayout_p.h>
#include <private/qabstractaxis_p.h>
#include <private/linearrowitem_p.h>
#include <QtGui/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
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