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Don't reserve space for chart title if it is empty....
Don't reserve space for chart title if it is empty. If title.isEmpty() returns true, chart title is no longer reserved any space. If you want to reserve space for "empty" title in the future, you can do so by specifying e.g. a single space for title. Task-number: QTRD-3480 Change-Id: I5b2b44acf715b3bd9b4243049c4985ca63a4a16d Reviewed-by: Titta Heikkala <titta.heikkala@theqtcompany.com>
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r2776:bc1f6aa59d42
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polarchartaxisradial.cpp
295 lines | 11.3 KiB | text/x-c | CppLexer
/ src / charts / axis / polarchartaxisradial.cpp
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Miikka Heikkinen
Add Polar chart support...
 r2483 /****************************************************************************
**
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Copyright header changes...
 r2776 ** Copyright (C) 2015 The Qt Company Ltd
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 r2483 ** All rights reserved.
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 r2776 ** For any questions to The Qt Company, please use contact form at http://qt.io
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 r2483 **
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Updated license headers...
 r2740 ** This file is part of the Qt Charts module.
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 r2483 **
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 r2740 ** 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
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 r2776 ** agreement between you and The Qt Company.
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 r2483 **
** If you have questions regarding the use of this file, please use
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 r2740 ** contact form at http://qt.io
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****************************************************************************/
Titta Heikkala
Fix include syntax...
 r2714 #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>
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 r2712 QT_CHARTS_BEGIN_NAMESPACE
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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();
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 r2539 QGraphicsTextItem* title = titleItem();
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 r2483 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));
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 r2539 QGraphicsTextItem *labelItem = static_cast<QGraphicsTextItem *>(labelItemList.at(i));
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 r2483 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)
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 r2504 labelCoordinate = qMax(qreal(0.0), labelCoordinate);
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labelCoordinate = (labelCoordinate + farEdge) / 2.0;
if (labelCoordinate > 0.0 && labelCoordinate < radius)
labelVisible = true;
else
labelVisible = false;
}
// Radial axis label
if (axis()->labelsVisible() && labelVisible) {
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 r2607 QRectF boundingRect = ChartPresenter::textBoundingRect(axis()->labelsFont(),
labelList.at(i),
axis()->labelsAngle());
labelItem->setTextWidth(boundingRect.width());
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 r2539 labelItem->setHtml(labelList.at(i));
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 r2483 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()) {
Titta Heikkala
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 r2607 QRectF truncatedRect;
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 r2604 title->setHtml(ChartPresenter::truncatedText(axis()->titleFont(), titleText, qreal(0.0),
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 r2607 radius, radius, truncatedRect));
title->setTextWidth(truncatedRect.width());
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 r2483
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 r2534 QRectF titleBoundingRect = title->boundingRect();
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 r2483 QPointF titleCenter = titleBoundingRect.center();
QPointF arrowCenter = axisLine->boundingRect().center();
QPointF titleCenterDiff = arrowCenter - titleCenter;
Miikka Heikkinen
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 r2540 title->setPos(titleCenterDiff.x() - titlePadding() - (titleBoundingRect.height() / 2.0), titleCenterDiff.y());
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 r2483 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);
}
Titta Heikkala
Fix setting the axis title...
 r2608 QGraphicsTextItem *title = titleItem();
title->setFont(axis()->titleFont());
title->setDefaultTextColor(axis()->titleBrush().color());
title->setHtml(axis()->titleText());
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 r2483 for (int i = 0; i < count; ++i) {
QGraphicsLineItem *arrow = new QGraphicsLineItem(presenter()->rootItem());
QGraphicsEllipseItem *grid = new QGraphicsEllipseItem(presenter()->rootItem());
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 r2539 QGraphicsTextItem *label = new QGraphicsTextItem(presenter()->rootItem());
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 r2592 label->document()->setDocumentMargin(ChartPresenter::textMargin());
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 r2483 arrow->setPen(axis()->linePen());
grid->setPen(axis()->gridLinePen());
label->setFont(axis()->labelsFont());
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 r2539 label->setDefaultTextColor(axis()->labelsBrush().color());
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 r2483 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"
Titta Heikkala
Qt Charts project file structure change...
 r2712 QT_CHARTS_END_NAMESPACE