|
|
/****************************************************************************
|
|
|
**
|
|
|
** Copyright (C) 2014 Digia Plc
|
|
|
** All rights reserved.
|
|
|
** For any questions to Digia, 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 Digia.
|
|
|
**
|
|
|
** If you have questions regarding the use of this file, please use
|
|
|
** contact form at http://qt.io
|
|
|
**
|
|
|
****************************************************************************/
|
|
|
|
|
|
#include <private/horizontalaxis_p.h>
|
|
|
#include <private/qabstractaxis_p.h>
|
|
|
#include <private/chartpresenter_p.h>
|
|
|
#include <QtCore/QtMath>
|
|
|
#include <QtCore/QDebug>
|
|
|
|
|
|
QT_CHARTS_BEGIN_NAMESPACE
|
|
|
|
|
|
HorizontalAxis::HorizontalAxis(QAbstractAxis *axis, QGraphicsItem *item, bool intervalAxis)
|
|
|
: CartesianChartAxis(axis, item, intervalAxis)
|
|
|
{
|
|
|
}
|
|
|
|
|
|
HorizontalAxis::~HorizontalAxis()
|
|
|
{
|
|
|
}
|
|
|
|
|
|
void HorizontalAxis::updateGeometry()
|
|
|
{
|
|
|
const QVector<qreal> &layout = ChartAxisElement::layout();
|
|
|
|
|
|
if (layout.isEmpty())
|
|
|
return;
|
|
|
|
|
|
QStringList labelList = labels();
|
|
|
|
|
|
QList<QGraphicsItem *> lines = gridItems();
|
|
|
QList<QGraphicsItem *> labels = labelItems();
|
|
|
QList<QGraphicsItem *> shades = shadeItems();
|
|
|
QList<QGraphicsItem *> arrow = arrowItems();
|
|
|
QGraphicsTextItem *title = titleItem();
|
|
|
|
|
|
Q_ASSERT(labels.size() == labelList.size());
|
|
|
Q_ASSERT(layout.size() == labelList.size());
|
|
|
|
|
|
const QRectF &axisRect = axisGeometry();
|
|
|
const QRectF &gridRect = gridGeometry();
|
|
|
|
|
|
//arrow
|
|
|
QGraphicsLineItem *arrowItem = static_cast<QGraphicsLineItem *>(arrow.at(0));
|
|
|
|
|
|
if (axis()->alignment() == Qt::AlignTop)
|
|
|
arrowItem->setLine(gridRect.left(), axisRect.bottom(), gridRect.right(), axisRect.bottom());
|
|
|
else if (axis()->alignment() == Qt::AlignBottom)
|
|
|
arrowItem->setLine(gridRect.left(), axisRect.top(), gridRect.right(), axisRect.top());
|
|
|
|
|
|
qreal width = 0;
|
|
|
const QLatin1String ellipsis("...");
|
|
|
|
|
|
//title
|
|
|
QRectF titleBoundingRect;
|
|
|
QString titleText = axis()->titleText();
|
|
|
qreal availableSpace = axisRect.height() - labelPadding();
|
|
|
if (!titleText.isEmpty() && titleItem()->isVisible()) {
|
|
|
availableSpace -= titlePadding() * 2.0;
|
|
|
qreal minimumLabelHeight = ChartPresenter::textBoundingRect(axis()->labelsFont(),
|
|
|
QStringLiteral("...")).height();
|
|
|
qreal titleSpace = availableSpace - minimumLabelHeight;
|
|
|
title->setHtml(ChartPresenter::truncatedText(axis()->titleFont(), titleText, qreal(0.0),
|
|
|
gridRect.width(), titleSpace,
|
|
|
titleBoundingRect));
|
|
|
title->setTextWidth(titleBoundingRect.width());
|
|
|
|
|
|
titleBoundingRect = title->boundingRect();
|
|
|
|
|
|
QPointF center = gridRect.center() - titleBoundingRect.center();
|
|
|
if (axis()->alignment() == Qt::AlignTop)
|
|
|
title->setPos(center.x(), axisRect.top() + titlePadding());
|
|
|
else if (axis()->alignment() == Qt::AlignBottom)
|
|
|
title->setPos(center.x(), axisRect.bottom() - titleBoundingRect.height() - titlePadding());
|
|
|
|
|
|
availableSpace -= titleBoundingRect.height();
|
|
|
}
|
|
|
|
|
|
for (int i = 0; i < layout.size(); ++i) {
|
|
|
//items
|
|
|
QGraphicsLineItem *gridItem = static_cast<QGraphicsLineItem*>(lines.at(i));
|
|
|
QGraphicsLineItem *tickItem = static_cast<QGraphicsLineItem*>(arrow.at(i + 1));
|
|
|
QGraphicsTextItem *labelItem = static_cast<QGraphicsTextItem *>(labels.at(i));
|
|
|
|
|
|
//grid line
|
|
|
gridItem->setLine(layout[i], gridRect.top(), layout[i], gridRect.bottom());
|
|
|
|
|
|
//label text wrapping
|
|
|
QString text = labelList.at(i);
|
|
|
QRectF boundingRect;
|
|
|
// don't truncate empty labels
|
|
|
if (text.isEmpty()) {
|
|
|
labelItem->setHtml(text);
|
|
|
} else {
|
|
|
qreal labelWidth = axisRect.width() / layout.count() - (2 * labelPadding());
|
|
|
QString truncatedText = ChartPresenter::truncatedText(axis()->labelsFont(), text,
|
|
|
axis()->labelsAngle(),
|
|
|
labelWidth,
|
|
|
availableSpace, boundingRect);
|
|
|
labelItem->setTextWidth(ChartPresenter::textBoundingRect(axis()->labelsFont(),
|
|
|
truncatedText).width());
|
|
|
labelItem->setHtml(truncatedText);
|
|
|
}
|
|
|
|
|
|
//label transformation origin point
|
|
|
const QRectF& rect = labelItem->boundingRect();
|
|
|
QPointF center = rect.center();
|
|
|
labelItem->setTransformOriginPoint(center.x(), center.y());
|
|
|
qreal heightDiff = rect.height() - boundingRect.height();
|
|
|
qreal widthDiff = rect.width() - boundingRect.width();
|
|
|
|
|
|
//ticks and label position
|
|
|
if (axis()->alignment() == Qt::AlignTop) {
|
|
|
labelItem->setPos(layout[i] - center.x(), axisRect.bottom() - rect.height() + (heightDiff / 2.0) - labelPadding());
|
|
|
tickItem->setLine(layout[i], axisRect.bottom(), layout[i], axisRect.bottom() - labelPadding());
|
|
|
} else if (axis()->alignment() == Qt::AlignBottom) {
|
|
|
labelItem->setPos(layout[i] - center.x(), axisRect.top() - (heightDiff / 2.0) + labelPadding());
|
|
|
tickItem->setLine(layout[i], axisRect.top(), layout[i], axisRect.top() + labelPadding());
|
|
|
}
|
|
|
|
|
|
//label in between
|
|
|
bool forceHide = false;
|
|
|
if (intervalAxis() && (i + 1) != layout.size()) {
|
|
|
qreal leftBound = qMax(layout[i], gridRect.left());
|
|
|
qreal rightBound = qMin(layout[i + 1], gridRect.right());
|
|
|
const qreal delta = rightBound - leftBound;
|
|
|
// Hide label in case visible part of the category at the grid edge is too narrow
|
|
|
if (delta < boundingRect.width()
|
|
|
&& (leftBound == gridRect.left() || rightBound == gridRect.right())
|
|
|
&& !intervalAxis()) {
|
|
|
forceHide = true;
|
|
|
} else {
|
|
|
labelItem->setPos(leftBound + (delta / 2.0) - center.x(), labelItem->pos().y());
|
|
|
}
|
|
|
}
|
|
|
|
|
|
//label overlap detection - compensate one pixel for rounding errors
|
|
|
if ((labelItem->pos().x() < width && labelItem->toPlainText() == ellipsis) || forceHide ||
|
|
|
(labelItem->pos().x() + (widthDiff / 2.0)) < (axisRect.left() - 1.0) ||
|
|
|
(labelItem->pos().x() + (widthDiff / 2.0) - 1.0) > axisRect.right()) {
|
|
|
labelItem->setVisible(false);
|
|
|
} else {
|
|
|
labelItem->setVisible(true);
|
|
|
width = boundingRect.width() + labelItem->pos().x();
|
|
|
}
|
|
|
|
|
|
//shades
|
|
|
QGraphicsRectItem *shadeItem = 0;
|
|
|
if (i == 0)
|
|
|
shadeItem = static_cast<QGraphicsRectItem *>(shades.at(0));
|
|
|
else if (i % 2)
|
|
|
shadeItem = static_cast<QGraphicsRectItem *>(shades.at((i / 2) + 1));
|
|
|
if (shadeItem) {
|
|
|
qreal leftBound;
|
|
|
qreal rightBound;
|
|
|
if (i == 0) {
|
|
|
leftBound = gridRect.left();
|
|
|
rightBound = layout[0];
|
|
|
} else {
|
|
|
leftBound = layout[i];
|
|
|
if (i == layout.size() - 1)
|
|
|
rightBound = gridRect.right();
|
|
|
else
|
|
|
rightBound = qMin(layout[i + 1], gridRect.right());
|
|
|
}
|
|
|
shadeItem->setRect(leftBound, gridRect.top(), rightBound - leftBound,
|
|
|
gridRect.height());
|
|
|
if (shadeItem->rect().width() <= 0.0)
|
|
|
shadeItem->setVisible(false);
|
|
|
else
|
|
|
shadeItem->setVisible(true);
|
|
|
}
|
|
|
|
|
|
// check if the grid line and the axis tick should be shown
|
|
|
qreal x = gridItem->line().p1().x();
|
|
|
if (x < gridRect.left() || x > gridRect.right()) {
|
|
|
gridItem->setVisible(false);
|
|
|
tickItem->setVisible(false);
|
|
|
} else {
|
|
|
gridItem->setVisible(true);
|
|
|
tickItem->setVisible(true);
|
|
|
}
|
|
|
|
|
|
}
|
|
|
|
|
|
//begin/end grid line in case labels between
|
|
|
if (intervalAxis()) {
|
|
|
QGraphicsLineItem *gridLine;
|
|
|
gridLine = static_cast<QGraphicsLineItem *>(lines.at(layout.size()));
|
|
|
gridLine->setLine(gridRect.right(), gridRect.top(), gridRect.right(), gridRect.bottom());
|
|
|
gridLine->setVisible(true);
|
|
|
gridLine = static_cast<QGraphicsLineItem*>(lines.at(layout.size()+1));
|
|
|
gridLine->setLine(gridRect.left(), gridRect.top(), gridRect.left(), gridRect.bottom());
|
|
|
gridLine->setVisible(true);
|
|
|
}
|
|
|
}
|
|
|
|
|
|
QSizeF HorizontalAxis::sizeHint(Qt::SizeHint which, const QSizeF &constraint) const
|
|
|
{
|
|
|
Q_UNUSED(constraint);
|
|
|
QSizeF sh(0,0);
|
|
|
|
|
|
if (axis()->titleText().isEmpty() || !titleItem()->isVisible())
|
|
|
return sh;
|
|
|
|
|
|
switch (which) {
|
|
|
case Qt::MinimumSize: {
|
|
|
QRectF titleRect = ChartPresenter::textBoundingRect(axis()->titleFont(),
|
|
|
QStringLiteral("..."));
|
|
|
sh = QSizeF(titleRect.width(), titleRect.height() + (titlePadding() * 2.0));
|
|
|
break;
|
|
|
}
|
|
|
case Qt::MaximumSize:
|
|
|
case Qt::PreferredSize: {
|
|
|
QRectF titleRect = ChartPresenter::textBoundingRect(axis()->titleFont(), axis()->titleText());
|
|
|
sh = QSizeF(titleRect.width(), titleRect.height() + (titlePadding() * 2.0));
|
|
|
break;
|
|
|
}
|
|
|
default:
|
|
|
break;
|
|
|
}
|
|
|
|
|
|
return sh;
|
|
|
}
|
|
|
|
|
|
QT_CHARTS_END_NAMESPACE
|
|
|
|
