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Fix multi-line axis titles....
Fix multi-line axis titles. Since QFontMetrics doesn't support getting bounding rects for multi-line strings, we use a dummy graphicsitem instead. Task-number: QTRD-2057 Change-Id: Id6e6a27a00977d295e6f1bce070b08df21c2a666 Reviewed-by: Mika Salmela <mika.salmela@digia.com>
Miikka Heikkinen - - Load All Authors

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r2483:f494279b6366
r2530:5f790ea7fbdd
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chartaxiselement.cpp
349 lines | 11.9 KiB | text/x-c | CppLexer
/ src / axis / chartaxiselement.cpp
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Miikka Heikkinen
Add Polar chart support...
 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 "chartaxiselement_p.h"
#include "qabstractaxis_p.h"
#include "chartpresenter_p.h"
#include "abstractchartlayout_p.h"
#include <qmath.h>
#include <QDateTime>
#include <QFontMetrics>
QTCOMMERCIALCHART_BEGIN_NAMESPACE
ChartAxisElement::ChartAxisElement(QAbstractAxis *axis, QGraphicsItem *item, bool intervalAxis)
: ChartElement(item),
m_axis(axis),
m_animation(0),
m_grid(new QGraphicsItemGroup(item)),
m_arrow(new QGraphicsItemGroup(item)),
m_shades(new QGraphicsItemGroup(item)),
m_labels(new QGraphicsItemGroup(item)),
m_title(new QGraphicsSimpleTextItem(item)),
m_intervalAxis(intervalAxis)
{
//initial initialization
m_arrow->setHandlesChildEvents(false);
m_arrow->setZValue(ChartPresenter::AxisZValue);
m_labels->setZValue(ChartPresenter::AxisZValue);
m_shades->setZValue(ChartPresenter::ShadesZValue);
m_grid->setZValue(ChartPresenter::GridZValue);
m_title->setZValue(ChartPresenter::GridZValue);
handleVisibleChanged(axis->isVisible());
connectSlots();
setFlag(QGraphicsItem::ItemHasNoContents, true);
}
ChartAxisElement::~ChartAxisElement()
{
}
void ChartAxisElement::connectSlots()
{
QObject::connect(axis(), SIGNAL(visibleChanged(bool)), this, SLOT(handleVisibleChanged(bool)));
QObject::connect(axis(), SIGNAL(lineVisibleChanged(bool)), this, SLOT(handleArrowVisibleChanged(bool)));
QObject::connect(axis(), SIGNAL(gridVisibleChanged(bool)), this, SLOT(handleGridVisibleChanged(bool)));
QObject::connect(axis(), SIGNAL(labelsVisibleChanged(bool)), this, SLOT(handleLabelsVisibleChanged(bool)));
QObject::connect(axis(), SIGNAL(shadesVisibleChanged(bool)), this, SLOT(handleShadesVisibleChanged(bool)));
QObject::connect(axis(), SIGNAL(labelsAngleChanged(int)), this, SLOT(handleLabelsAngleChanged(int)));
QObject::connect(axis(), SIGNAL(linePenChanged(const QPen&)), this, SLOT(handleArrowPenChanged(const QPen&)));
QObject::connect(axis(), SIGNAL(labelsPenChanged(const QPen&)), this, SLOT(handleLabelsPenChanged(const QPen&)));
QObject::connect(axis(), SIGNAL(labelsBrushChanged(const QBrush&)), this, SLOT(handleLabelsBrushChanged(const QBrush&)));
QObject::connect(axis(), SIGNAL(labelsFontChanged(const QFont&)), this, SLOT(handleLabelsFontChanged(const QFont&)));
QObject::connect(axis(), SIGNAL(gridLinePenChanged(const QPen&)), this, SLOT(handleGridPenChanged(const QPen&)));
QObject::connect(axis(), SIGNAL(shadesPenChanged(const QPen&)), this, SLOT(handleShadesPenChanged(const QPen&)));
QObject::connect(axis(), SIGNAL(shadesBrushChanged(const QBrush&)), this, SLOT(handleShadesBrushChanged(const QBrush&)));
QObject::connect(axis(), SIGNAL(titleTextChanged(const QString&)), this, SLOT(handleTitleTextChanged(const QString&)));
QObject::connect(axis(), SIGNAL(titleFontChanged(const QFont&)), this, SLOT(handleTitleFontChanged(const QFont&)));
QObject::connect(axis(), SIGNAL(titlePenChanged(const QPen&)), this, SLOT(handleTitlePenChanged(const QPen&)));
QObject::connect(axis(), SIGNAL(titleBrushChanged(const QBrush&)), this, SLOT(handleTitleBrushChanged(const QBrush&)));
QObject::connect(axis(), SIGNAL(titleVisibleChanged(bool)), this, SLOT(handleTitleVisibleChanged(bool)));
QObject::connect(axis()->d_ptr.data(), SIGNAL(rangeChanged(qreal, qreal)), this, SLOT(handleRangeChanged(qreal, qreal)));
}
void ChartAxisElement::handleArrowVisibleChanged(bool visible)
{
m_arrow->setVisible(visible);
}
void ChartAxisElement::handleGridVisibleChanged(bool visible)
{
m_grid->setVisible(visible);
}
void ChartAxisElement::handleLabelsVisibleChanged(bool visible)
{
QGraphicsLayoutItem::updateGeometry();
presenter()->layout()->invalidate();
m_labels->setVisible(visible);
}
void ChartAxisElement::handleShadesVisibleChanged(bool visible)
{
m_shades->setVisible(visible);
}
void ChartAxisElement::handleTitleVisibleChanged(bool visible)
{
QGraphicsLayoutItem::updateGeometry();
presenter()->layout()->invalidate();
m_title->setVisible(visible);
}
void ChartAxisElement::handleLabelsAngleChanged(int angle)
{
foreach (QGraphicsItem *item, m_labels->childItems())
item->setRotation(angle);
QGraphicsLayoutItem::updateGeometry();
presenter()->layout()->invalidate();
}
void ChartAxisElement::handleLabelsPenChanged(const QPen &pen)
{
foreach (QGraphicsItem *item, m_labels->childItems())
static_cast<QGraphicsSimpleTextItem *>(item)->setPen(pen);
}
void ChartAxisElement::handleLabelsBrushChanged(const QBrush &brush)
{
foreach (QGraphicsItem *item, m_labels->childItems())
static_cast<QGraphicsSimpleTextItem *>(item)->setBrush(brush);
}
void ChartAxisElement::handleLabelsFontChanged(const QFont &font)
{
foreach (QGraphicsItem *item, m_labels->childItems())
static_cast<QGraphicsSimpleTextItem *>(item)->setFont(font);
QGraphicsLayoutItem::updateGeometry();
presenter()->layout()->invalidate();
}
void ChartAxisElement::handleTitleTextChanged(const QString &title)
{
QGraphicsLayoutItem::updateGeometry();
presenter()->layout()->invalidate();
m_title->setText(title);
}
void ChartAxisElement::handleTitlePenChanged(const QPen &pen)
{
m_title->setPen(pen);
}
void ChartAxisElement::handleTitleBrushChanged(const QBrush &brush)
{
m_title->setBrush(brush);
}
void ChartAxisElement::handleTitleFontChanged(const QFont &font)
{
if (m_title->font() != font) {
m_title->setFont(font);
QGraphicsLayoutItem::updateGeometry();
presenter()->layout()->invalidate();
}
}
void ChartAxisElement::handleVisibleChanged(bool visible)
{
setVisible(visible);
if (!visible) {
m_grid->setVisible(visible);
m_arrow->setVisible(visible);
m_shades->setVisible(visible);
m_labels->setVisible(visible);
m_title->setVisible(visible);
} else {
m_grid->setVisible(axis()->isGridLineVisible());
m_arrow->setVisible(axis()->isLineVisible());
m_shades->setVisible(axis()->shadesVisible());
m_labels->setVisible(axis()->labelsVisible());
m_title->setVisible(axis()->isTitleVisible());
}
if (presenter()) presenter()->layout()->invalidate();
}
QRect ChartAxisElement::labelBoundingRect(const QFontMetrics &fn, const QString &label) const
{
QRect boundingRect = fn.boundingRect(label);
// Take label rotation into account
if (axis()->labelsAngle()) {
QTransform transform;
transform.rotate(axis()->labelsAngle());
boundingRect = transform.mapRect(boundingRect);
}
return boundingRect;
}
void ChartAxisElement::handleRangeChanged(qreal min, qreal max)
{
Q_UNUSED(min);
Q_UNUSED(max);
if (!isEmpty()) {
QVector<qreal> layout = calculateLayout();
updateLayout(layout);
QSizeF before = effectiveSizeHint(Qt::PreferredSize);
QSizeF after = sizeHint(Qt::PreferredSize);
if (before != after) {
QGraphicsLayoutItem::updateGeometry();
// We don't want to call invalidate on layout, since it will change minimum size of
// component, which we would like to avoid since it causes nasty flips when scrolling
// or zooming, instead recalculate layout and use plotArea for extra space.
presenter()->layout()->setGeometry(presenter()->layout()->geometry());
}
}
}
bool ChartAxisElement::isEmpty()
{
return axisGeometry().isEmpty()
|| gridGeometry().isEmpty()
|| qFuzzyCompare(min(), max());
}
qreal ChartAxisElement::min() const
{
return m_axis->d_ptr->min();
}
qreal ChartAxisElement::max() const
{
return m_axis->d_ptr->max();
}
QStringList ChartAxisElement::createValueLabels(qreal min, qreal max, int ticks, const QString &format)
{
QStringList labels;
if (max <= min || ticks < 1)
return labels;
int n = qMax(int(-qFloor(log10((max - min) / (ticks - 1)))), 0);
n++;
if (format.isNull()) {
for (int i = 0; i < ticks; i++) {
qreal value = min + (i * (max - min) / (ticks - 1));
labels << QString::number(value, 'f', n);
}
} else {
QByteArray array = format.toLatin1();
for (int i = 0; i < ticks; i++) {
qreal value = min + (i * (max - min) / (ticks - 1));
if (format.contains("d")
|| format.contains("i")
|| format.contains("c")) {
labels << QString().sprintf(array, (qint64)value);
} else if (format.contains("u")
|| format.contains("o")
|| format.contains("x", Qt::CaseInsensitive)) {
labels << QString().sprintf(array, (quint64)value);
} else if (format.contains("f", Qt::CaseInsensitive)
|| format.contains("e", Qt::CaseInsensitive)
|| format.contains("g", Qt::CaseInsensitive)) {
labels << QString().sprintf(array, value);
} else {
labels << QString();
}
}
}
return labels;
}
QStringList ChartAxisElement::createLogValueLabels(qreal min, qreal max, qreal base, int ticks, const QString &format)
{
QStringList labels;
if (max <= min || ticks < 1)
return labels;
int n = 0;
if (ticks > 1)
n = qMax(int(-qFloor(log10((max - min) / (ticks - 1)))), 0);
n++;
int firstTick;
if (base > 1)
firstTick = ceil(log10(min) / log10(base));
else
firstTick = ceil(log10(max) / log10(base));
if (format.isNull()) {
for (int i = firstTick; i < ticks + firstTick; i++) {
qreal value = qPow(base, i);
labels << QString::number(value, 'f', n);
}
} else {
QByteArray array = format.toLatin1();
for (int i = firstTick; i < ticks + firstTick; i++) {
qreal value = qPow(base, i);
if (format.contains("d")
|| format.contains("i")
|| format.contains("c")) {
labels << QString().sprintf(array, (qint64)value);
} else if (format.contains("u")
|| format.contains("o")
|| format.contains("x", Qt::CaseInsensitive)) {
labels << QString().sprintf(array, (quint64)value);
} else if (format.contains("f", Qt::CaseInsensitive)
|| format.contains("e", Qt::CaseInsensitive)
|| format.contains("g", Qt::CaseInsensitive)) {
labels << QString().sprintf(array, value);
} else {
labels << QString();
}
}
}
return labels;
}
QStringList ChartAxisElement::createDateTimeLabels(qreal min, qreal max,int ticks,const QString &format)
{
QStringList labels;
if (max <= min || ticks < 1)
return labels;
int n = qMax(int(-floor(log10((max - min) / (ticks - 1)))), 0);
n++;
for (int i = 0; i < ticks; i++) {
qreal value = min + (i * (max - min) / (ticks - 1));
labels << QDateTime::fromMSecsSinceEpoch(value).toString(format);
}
return labels;
}
void ChartAxisElement::axisSelected()
{
emit clicked();
}
#include "moc_chartaxiselement_p.cpp"
QTCOMMERCIALCHART_END_NAMESPACE