|
|
/****************************************************************************
|
|
|
**
|
|
|
** 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 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 "polarchartaxisangular_p.h"
|
|
|
#include "chartpresenter_p.h"
|
|
|
#include "abstractchartlayout_p.h"
|
|
|
#include "qabstractaxis.h"
|
|
|
#include "qabstractaxis_p.h"
|
|
|
#include <QDebug>
|
|
|
#include <qmath.h>
|
|
|
|
|
|
QTCOMMERCIALCHART_BEGIN_NAMESPACE
|
|
|
|
|
|
PolarChartAxisAngular::PolarChartAxisAngular(QAbstractAxis *axis, QGraphicsItem *item, bool intervalAxis)
|
|
|
: PolarChartAxis(axis, item, intervalAxis)
|
|
|
{
|
|
|
}
|
|
|
|
|
|
PolarChartAxisAngular::~PolarChartAxisAngular()
|
|
|
{
|
|
|
}
|
|
|
|
|
|
void PolarChartAxisAngular::updateGeometry()
|
|
|
{
|
|
|
QGraphicsLayoutItem::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();
|
|
|
|
|
|
QGraphicsEllipseItem *axisLine = static_cast<QGraphicsEllipseItem *>(arrowItemList.at(0));
|
|
|
axisLine->setRect(axisGeometry());
|
|
|
|
|
|
qreal radius = axisGeometry().height() / 2.0;
|
|
|
|
|
|
QRectF previousLabelRect;
|
|
|
QRectF firstLabelRect;
|
|
|
|
|
|
qreal labelHeight = 0;
|
|
|
|
|
|
bool firstShade = true;
|
|
|
bool nextTickVisible = false;
|
|
|
if (layout.size())
|
|
|
nextTickVisible = !(layout.at(0) < 0.0 || layout.at(0) > 360.0);
|
|
|
|
|
|
for (int i = 0; i < layout.size(); ++i) {
|
|
|
qreal angularCoordinate = layout.at(i);
|
|
|
|
|
|
QGraphicsLineItem *gridLineItem = static_cast<QGraphicsLineItem *>(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) > 360.0) {
|
|
|
nextTickVisible = false;
|
|
|
} else {
|
|
|
nextTickVisible = true;
|
|
|
}
|
|
|
|
|
|
qreal labelCoordinate = angularCoordinate;
|
|
|
qreal labelVisible = currentTickVisible;
|
|
|
if (intervalAxis()) {
|
|
|
qreal farEdge;
|
|
|
if (i == (layout.size() - 1))
|
|
|
farEdge = 360.0;
|
|
|
else
|
|
|
farEdge = qMin(qreal(360.0), 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;
|
|
|
// Don't display label once the category gets too small near the axis
|
|
|
if (labelCoordinate < 5.0 || labelCoordinate > 355.0)
|
|
|
labelVisible = false;
|
|
|
else
|
|
|
labelVisible = true;
|
|
|
}
|
|
|
|
|
|
// Need this also in label calculations, so determine it first
|
|
|
QLineF tickLine(QLineF::fromPolar(radius - tickWidth(), 90.0 - angularCoordinate).p2(),
|
|
|
QLineF::fromPolar(radius + tickWidth(), 90.0 - angularCoordinate).p2());
|
|
|
tickLine.translate(center);
|
|
|
|
|
|
// Angular axis label
|
|
|
if (axis()->labelsVisible() && labelVisible) {
|
|
|
labelItem->setHtml(labelList.at(i));
|
|
|
const QRectF &rect = labelItem->boundingRect();
|
|
|
QPointF labelCenter = rect.center();
|
|
|
labelItem->setTransformOriginPoint(labelCenter.x(), labelCenter.y());
|
|
|
QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(), labelList.at(i), axis()->labelsAngle());
|
|
|
boundingRect.moveCenter(labelCenter);
|
|
|
QPointF positionDiff(rect.topLeft() - boundingRect.topLeft());
|
|
|
|
|
|
QPointF labelPoint;
|
|
|
if (intervalAxis()) {
|
|
|
QLineF labelLine = QLineF::fromPolar(radius + tickWidth(), 90.0 - labelCoordinate);
|
|
|
labelLine.translate(center);
|
|
|
labelPoint = labelLine.p2();
|
|
|
} else {
|
|
|
labelPoint = tickLine.p2();
|
|
|
}
|
|
|
|
|
|
QRectF labelRect = moveLabelToPosition(labelCoordinate, labelPoint, boundingRect);
|
|
|
labelItem->setPos(labelRect.topLeft() + positionDiff);
|
|
|
|
|
|
// Store height for title calculations
|
|
|
qreal labelClearance = axisGeometry().top() - labelRect.top();
|
|
|
labelHeight = qMax(labelHeight, labelClearance);
|
|
|
|
|
|
// Label overlap detection
|
|
|
if (i && (previousLabelRect.intersects(labelRect) || firstLabelRect.intersects(labelRect))) {
|
|
|
labelVisible = false;
|
|
|
} else {
|
|
|
// Store labelRect for future comparison. Some area is deducted to make things look
|
|
|
// little nicer, as usually intersection happens at label corner with angular labels.
|
|
|
labelRect.adjust(-2.0, -4.0, -2.0, -4.0);
|
|
|
if (firstLabelRect.isEmpty())
|
|
|
firstLabelRect = labelRect;
|
|
|
|
|
|
previousLabelRect = labelRect;
|
|
|
labelVisible = true;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
labelItem->setVisible(labelVisible);
|
|
|
if (!currentTickVisible) {
|
|
|
gridLineItem->setVisible(false);
|
|
|
tickItem->setVisible(false);
|
|
|
if (shadeItem)
|
|
|
shadeItem->setVisible(false);
|
|
|
continue;
|
|
|
}
|
|
|
|
|
|
// Angular grid line
|
|
|
QLineF gridLine = QLineF::fromPolar(radius, 90.0 - angularCoordinate);
|
|
|
gridLine.translate(center);
|
|
|
gridLineItem->setLine(gridLine);
|
|
|
gridLineItem->setVisible(true);
|
|
|
|
|
|
// Tick
|
|
|
tickItem->setLine(tickLine);
|
|
|
tickItem->setVisible(true);
|
|
|
|
|
|
// Shades
|
|
|
if (i % 2 || (i == 0 && !nextTickVisible)) {
|
|
|
QPainterPath path;
|
|
|
path.moveTo(center);
|
|
|
if (i == 0) {
|
|
|
// If first tick is also the last, we need to custom fill the first partial arc
|
|
|
// or it won't get filled.
|
|
|
path.arcTo(axisGeometry(), 90.0 - layout.at(0), layout.at(0));
|
|
|
path.closeSubpath();
|
|
|
} else {
|
|
|
qreal nextCoordinate;
|
|
|
if (!nextTickVisible) // Last visible tick
|
|
|
nextCoordinate = 360.0;
|
|
|
else
|
|
|
nextCoordinate = layout.at(i + 1);
|
|
|
qreal arcSpan = angularCoordinate - nextCoordinate;
|
|
|
path.arcTo(axisGeometry(), 90.0 - angularCoordinate, arcSpan);
|
|
|
path.closeSubpath();
|
|
|
|
|
|
// Add additional arc for first shade item if there is a partial arc to be filled
|
|
|
if (firstShade) {
|
|
|
QGraphicsPathItem *specialShadeItem = static_cast<QGraphicsPathItem *>(shadeItemList.at(0));
|
|
|
if (layout.at(i - 1) > 0.0) {
|
|
|
QPainterPath specialPath;
|
|
|
specialPath.moveTo(center);
|
|
|
specialPath.arcTo(axisGeometry(), 90.0 - layout.at(i - 1), layout.at(i - 1));
|
|
|
specialPath.closeSubpath();
|
|
|
specialShadeItem->setPath(specialPath);
|
|
|
specialShadeItem->setVisible(true);
|
|
|
} else {
|
|
|
specialShadeItem->setVisible(false);
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
shadeItem->setPath(path);
|
|
|
shadeItem->setVisible(true);
|
|
|
firstShade = false;
|
|
|
}
|
|
|
}
|
|
|
|
|
|
// Title, centered above the chart
|
|
|
QString titleText = axis()->titleText();
|
|
|
if (!titleText.isEmpty() && axis()->isTitleVisible()) {
|
|
|
QRectF dummyRect;
|
|
|
title->setHtml(ChartPresenter::truncatedText(axis()->titleFont(), titleText, qreal(0.0), axisGeometry().width(), Qt::Horizontal, dummyRect));
|
|
|
|
|
|
QRectF titleBoundingRect = title->boundingRect();
|
|
|
QPointF titleCenter = center - titleBoundingRect.center();
|
|
|
title->setPos(titleCenter.x(), axisGeometry().top() - titlePadding() * 2.0 - titleBoundingRect.height() - labelHeight);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
Qt::Orientation PolarChartAxisAngular::orientation() const
|
|
|
{
|
|
|
return Qt::Horizontal;
|
|
|
}
|
|
|
|
|
|
void PolarChartAxisAngular::createItems(int count)
|
|
|
{
|
|
|
if (arrowItems().count() == 0) {
|
|
|
// angular axis line
|
|
|
// TODO: need class similar to LineArrowItem for click handling?
|
|
|
QGraphicsEllipseItem *arrow = new QGraphicsEllipseItem(presenter()->rootItem());
|
|
|
arrow->setPen(axis()->linePen());
|
|
|
arrowGroup()->addToGroup(arrow);
|
|
|
}
|
|
|
|
|
|
for (int i = 0; i < count; ++i) {
|
|
|
QGraphicsLineItem *arrow = new QGraphicsLineItem(presenter()->rootItem());
|
|
|
QGraphicsLineItem *grid = new QGraphicsLineItem(presenter()->rootItem());
|
|
|
QGraphicsTextItem *label = new QGraphicsTextItem(presenter()->rootItem());
|
|
|
QGraphicsTextItem *title = titleItem();
|
|
|
arrow->setPen(axis()->linePen());
|
|
|
grid->setPen(axis()->gridLinePen());
|
|
|
label->setFont(axis()->labelsFont());
|
|
|
label->setDefaultTextColor(axis()->labelsBrush().color());
|
|
|
label->setRotation(axis()->labelsAngle());
|
|
|
title->setFont(axis()->titleFont());
|
|
|
title->setDefaultTextColor(axis()->titleBrush().color());
|
|
|
title->setHtml(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 PolarChartAxisAngular::handleArrowPenChanged(const QPen &pen)
|
|
|
{
|
|
|
bool first = true;
|
|
|
foreach (QGraphicsItem *item, arrowItems()) {
|
|
|
if (first) {
|
|
|
first = false;
|
|
|
// First arrow item is the outer circle of axis
|
|
|
static_cast<QGraphicsEllipseItem *>(item)->setPen(pen);
|
|
|
} else {
|
|
|
static_cast<QGraphicsLineItem *>(item)->setPen(pen);
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
void PolarChartAxisAngular::handleGridPenChanged(const QPen &pen)
|
|
|
{
|
|
|
foreach (QGraphicsItem *item, gridItems())
|
|
|
static_cast<QGraphicsLineItem *>(item)->setPen(pen);
|
|
|
}
|
|
|
|
|
|
QSizeF PolarChartAxisAngular::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
|
|
|
{
|
|
|
Q_UNUSED(which);
|
|
|
Q_UNUSED(constraint);
|
|
|
return QSizeF(-1, -1);
|
|
|
}
|
|
|
|
|
|
qreal PolarChartAxisAngular::preferredAxisRadius(const QSizeF &maxSize)
|
|
|
{
|
|
|
qreal radius = maxSize.height() / 2.0;
|
|
|
if (maxSize.width() < maxSize.height())
|
|
|
radius = maxSize.width() / 2.0;
|
|
|
|
|
|
if (axis()->labelsVisible()) {
|
|
|
QVector<qreal> layout = calculateLayout();
|
|
|
if (layout.isEmpty())
|
|
|
return radius;
|
|
|
|
|
|
createAxisLabels(layout);
|
|
|
QStringList labelList = labels();
|
|
|
QFont font = axis()->labelsFont();
|
|
|
|
|
|
QRectF maxRect;
|
|
|
maxRect.setSize(maxSize);
|
|
|
maxRect.moveCenter(QPointF(0.0, 0.0));
|
|
|
|
|
|
// This is a horrible way to find out the maximum radius for angular axis and its labels.
|
|
|
// It just increments the radius down until everyhing fits the constraint size.
|
|
|
// Proper way would be to actually calculate it but this seems to work reasonably fast as it is.
|
|
|
bool nextTickVisible = false;
|
|
|
for (int i = 0; i < layout.size(); ) {
|
|
|
if ((i == layout.size() - 1)
|
|
|
|| layout.at(i + 1) < 0.0
|
|
|
|| layout.at(i + 1) > 360.0) {
|
|
|
nextTickVisible = false;
|
|
|
} else {
|
|
|
nextTickVisible = true;
|
|
|
}
|
|
|
|
|
|
qreal labelCoordinate = layout.at(i);
|
|
|
qreal labelVisible;
|
|
|
|
|
|
if (intervalAxis()) {
|
|
|
qreal farEdge;
|
|
|
if (i == (layout.size() - 1))
|
|
|
farEdge = 360.0;
|
|
|
else
|
|
|
farEdge = qMin(qreal(360.0), 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 > 360.0)
|
|
|
labelVisible = false;
|
|
|
else
|
|
|
labelVisible = true;
|
|
|
|
|
|
if (!labelVisible) {
|
|
|
i++;
|
|
|
continue;
|
|
|
}
|
|
|
|
|
|
QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(), labelList.at(i), axis()->labelsAngle());
|
|
|
QPointF labelPoint = QLineF::fromPolar(radius + tickWidth(), 90.0 - labelCoordinate).p2();
|
|
|
|
|
|
boundingRect = moveLabelToPosition(labelCoordinate, labelPoint, boundingRect);
|
|
|
QRectF intersectRect = maxRect.intersected(boundingRect);
|
|
|
if (boundingRect.isEmpty() || intersectRect == boundingRect) {
|
|
|
i++;
|
|
|
} else {
|
|
|
qreal reduction(0.0);
|
|
|
// If there is no intersection, reduce by smallest dimension of label rect to be on the safe side
|
|
|
if (intersectRect.isEmpty()) {
|
|
|
reduction = qMin(boundingRect.height(), boundingRect.width());
|
|
|
} else {
|
|
|
// Approximate needed radius reduction is the amount label rect exceeds max rect in either dimension.
|
|
|
// Could be further optimized by figuring out the proper math how to calculate exact needed reduction.
|
|
|
reduction = qMax(boundingRect.height() - intersectRect.height(),
|
|
|
boundingRect.width() - intersectRect.width());
|
|
|
}
|
|
|
// Typically the approximated reduction is little low, so add one
|
|
|
radius -= (reduction + 1.0);
|
|
|
|
|
|
if (radius < 1.0) // safeguard
|
|
|
return 1.0;
|
|
|
}
|
|
|
}
|
|
|
}
|
|
|
|
|
|
if (!axis()->titleText().isEmpty() && axis()->isTitleVisible()) {
|
|
|
QRectF titleRect = ChartPresenter::textBoundingRect(axis()->titleFont(), axis()->titleText());
|
|
|
|
|
|
radius -= titlePadding() + (titleRect.height() / 2.0);
|
|
|
if (radius < 1.0) // safeguard
|
|
|
return 1.0;
|
|
|
}
|
|
|
|
|
|
return radius;
|
|
|
}
|
|
|
|
|
|
QRectF PolarChartAxisAngular::moveLabelToPosition(qreal angularCoordinate, QPointF labelPoint, QRectF labelRect) const
|
|
|
{
|
|
|
// TODO use fuzzy compare for "==" cases?
|
|
|
// TODO Adjust the rect position near 0, 90, 180, and 270 angles for smoother animation?
|
|
|
if (angularCoordinate == 0.0)
|
|
|
labelRect.moveCenter(labelPoint + QPointF(0, -labelRect.height() / 2.0));
|
|
|
else if (angularCoordinate < 90.0)
|
|
|
labelRect.moveBottomLeft(labelPoint);
|
|
|
else if (angularCoordinate == 90.0)
|
|
|
labelRect.moveCenter(labelPoint + QPointF(labelRect.width() / 2.0 + 2.0, 0)); // +2 so that it does not hit the radial axis
|
|
|
else if (angularCoordinate < 180.0)
|
|
|
labelRect.moveTopLeft(labelPoint);
|
|
|
else if (angularCoordinate == 180.0)
|
|
|
labelRect.moveCenter(labelPoint + QPointF(0, labelRect.height() / 2.0));
|
|
|
else if (angularCoordinate < 270.0)
|
|
|
labelRect.moveTopRight(labelPoint);
|
|
|
else if (angularCoordinate == 270.0)
|
|
|
labelRect.moveCenter(labelPoint + QPointF(-labelRect.width() / 2.0 - 2.0, 0)); // -2 so that it does not hit the radial axis
|
|
|
else if (angularCoordinate < 360.0)
|
|
|
labelRect.moveBottomRight(labelPoint);
|
|
|
else
|
|
|
labelRect.moveCenter(labelPoint + QPointF(0, -labelRect.height() / 2.0));
|
|
|
return labelRect;
|
|
|
}
|
|
|
|
|
|
#include "moc_polarchartaxisangular_p.cpp"
|
|
|
|
|
|
QTCOMMERCIALCHART_END_NAMESPACE
|
|
|
|
