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fix painting coordinates and added LGPL
fix painting coordinates and added LGPL

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chartaxiselement.cpp
456 lines | 17.4 KiB | text/x-c | CppLexer
/ src / charts / axis / chartaxiselement.cpp
/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Charts module of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <private/chartaxiselement_p.h>
#include <private/qabstractaxis_p.h>
#include <private/chartpresenter_p.h>
#include <private/abstractchartlayout_p.h>
#include <QtCharts/QCategoryAxis>
#include <QtCore/QtMath>
#include <QtCore/QDateTime>
#include <QtGui/QTextDocument>
#include <cmath>
QT_CHARTS_BEGIN_NAMESPACE
static const char *labelFormatMatchString = "%[\\-\\+#\\s\\d\\.\\'lhjztL]*([dicuoxfegXFEG])";
static const char *labelFormatMatchLocalizedString = "^([^%]*)%\\.(\\d+)([defgiEG])(.*)$";
static QRegExp *labelFormatMatcher = 0;
static QRegExp *labelFormatMatcherLocalized = 0;
class StaticLabelFormatMatcherDeleter
{
public:
StaticLabelFormatMatcherDeleter() {}
~StaticLabelFormatMatcherDeleter() {
delete labelFormatMatcher;
delete labelFormatMatcherLocalized;
}
};
static StaticLabelFormatMatcherDeleter staticLabelFormatMatcherDeleter;
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_minorGrid(new QGraphicsItemGroup(item)),
m_minorArrow(new QGraphicsItemGroup(item)),
m_shades(new QGraphicsItemGroup(item)),
m_labels(new QGraphicsItemGroup(item)),
m_title(new QGraphicsTextItem(item)),
m_intervalAxis(intervalAxis)
{
//initial initialization
m_arrow->setHandlesChildEvents(false);
m_arrow->setZValue(ChartPresenter::AxisZValue);
m_minorArrow->setHandlesChildEvents(false);
m_minorArrow->setZValue(ChartPresenter::AxisZValue);
m_labels->setZValue(ChartPresenter::AxisZValue);
m_shades->setZValue(ChartPresenter::ShadesZValue);
m_grid->setZValue(ChartPresenter::GridZValue);
m_minorGrid->setZValue(ChartPresenter::GridZValue);
m_title->setZValue(ChartPresenter::GridZValue);
m_title->document()->setDocumentMargin(ChartPresenter::textMargin());
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(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(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)));
QObject::connect(axis(), SIGNAL(reverseChanged(bool)), this, SLOT(handleReverseChanged(bool)));
QObject::connect(axis(), SIGNAL(lineVisibleChanged(bool)),
this, SLOT(handleMinorArrowVisibleChanged(bool)));
QObject::connect(axis(), SIGNAL(linePenChanged(const QPen&)), this,
SLOT(handleMinorArrowPenChanged(const QPen&)));
QObject::connect(axis(), SIGNAL(minorGridVisibleChanged(bool)),
this, SLOT(handleMinorGridVisibleChanged(bool)));
QObject::connect(axis(), SIGNAL(minorGridLinePenChanged(const QPen&)),
this, SLOT(handleMinorGridPenChanged(const QPen&)));
QObject::connect(axis(), SIGNAL(gridLineColorChanged(const QColor&)),
this, SLOT(handleGridLineColorChanged(const QColor&)));
QObject::connect(axis(), SIGNAL(minorGridLineColorChanged(const QColor&)),
this, SLOT(handleMinorGridLineColorChanged(const QColor&)));
if (axis()->type() == QAbstractAxis::AxisTypeCategory) {
QCategoryAxis *categoryAxis = static_cast<QCategoryAxis *>(axis());
QObject::connect(categoryAxis,
SIGNAL(labelsPositionChanged(QCategoryAxis::AxisLabelsPosition)),
this, SLOT(handleLabelsPositionChanged()));
}
}
void ChartAxisElement::handleArrowVisibleChanged(bool visible)
{
m_arrow->setVisible(visible);
}
void ChartAxisElement::handleMinorArrowVisibleChanged(bool visible)
{
m_minorArrow->setVisible(visible);
}
void ChartAxisElement::handleGridVisibleChanged(bool visible)
{
m_grid->setVisible(visible);
}
void ChartAxisElement::handleMinorGridVisibleChanged(bool visible)
{
m_minorGrid->setVisible(visible);
}
void ChartAxisElement::handleLabelsPositionChanged()
{
QGraphicsLayoutItem::updateGeometry();
presenter()->layout()->invalidate();
}
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::handleLabelsBrushChanged(const QBrush &brush)
{
foreach (QGraphicsItem *item, m_labels->childItems())
static_cast<QGraphicsTextItem *>(item)->setDefaultTextColor(brush.color());
}
void ChartAxisElement::handleLabelsFontChanged(const QFont &font)
{
foreach (QGraphicsItem *item, m_labels->childItems())
static_cast<QGraphicsTextItem *>(item)->setFont(font);
QGraphicsLayoutItem::updateGeometry();
presenter()->layout()->invalidate();
}
void ChartAxisElement::handleTitleTextChanged(const QString &title)
{
QGraphicsLayoutItem::updateGeometry();
presenter()->layout()->invalidate();
if (title.isEmpty() || !m_title->isVisible())
m_title->setHtml(title);
}
void ChartAxisElement::handleTitleBrushChanged(const QBrush &brush)
{
m_title->setDefaultTextColor(brush.color());
}
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_minorGrid->setVisible(visible);
m_minorArrow->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_minorGrid->setVisible(axis()->isMinorGridLineVisible());
m_minorArrow->setVisible(axis()->isLineVisible());
m_shades->setVisible(axis()->shadesVisible());
m_labels->setVisible(axis()->labelsVisible());
m_title->setVisible(axis()->isTitleVisible());
}
if (presenter()) presenter()->layout()->invalidate();
}
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());
}
}
}
void ChartAxisElement::handleReverseChanged(bool reverse)
{
Q_UNUSED(reverse);
QGraphicsLayoutItem::updateGeometry();
presenter()->layout()->invalidate();
}
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();
}
QString ChartAxisElement::formatLabel(const QString &formatSpec, const QByteArray &array,
qreal value, int precision, const QString &preStr,
const QString &postStr) const
{
QString retVal;
if (!formatSpec.isEmpty()) {
if (formatSpec.at(0) == QLatin1Char('d')
|| formatSpec.at(0) == QLatin1Char('i')
|| formatSpec.at(0) == QLatin1Char('c')) {
if (presenter()->localizeNumbers())
retVal = preStr + presenter()->locale().toString(qint64(value)) + postStr;
else
retVal = QString().sprintf(array, qint64(value));
} else if (formatSpec.at(0) == QLatin1Char('u')
|| formatSpec.at(0) == QLatin1Char('o')
|| formatSpec.at(0) == QLatin1Char('x')
|| formatSpec.at(0) == QLatin1Char('X')) {
// These formats are not supported by localized numbers
retVal = QString().sprintf(array, quint64(value));
} else if (formatSpec.at(0) == QLatin1Char('f')
|| formatSpec.at(0) == QLatin1Char('F')
|| formatSpec.at(0) == QLatin1Char('e')
|| formatSpec.at(0) == QLatin1Char('E')
|| formatSpec.at(0) == QLatin1Char('g')
|| formatSpec.at(0) == QLatin1Char('G')) {
if (presenter()->localizeNumbers()) {
retVal = preStr
+ presenter()->locale().toString(value, formatSpec.at(0).toLatin1(),
precision)
+ postStr;
} else {
retVal = QString().sprintf(array, value);
}
}
}
return retVal;
}
QStringList ChartAxisElement::createValueLabels(qreal min, qreal max, int ticks,
const QString &format) const
{
QStringList labels;
if (max <= min || ticks < 1)
return labels;
if (format.isNull()) {
int n = qMax(int(-qFloor(std::log10((max - min) / (ticks - 1)))), 0) + 1;
for (int i = 0; i < ticks; i++) {
qreal value = min + (i * (max - min) / (ticks - 1));
labels << presenter()->numberToString(value, 'f', n);
}
} else {
QByteArray array = format.toLatin1();
QString formatSpec;
QString preStr;
QString postStr;
int precision = 6; // Six is the default precision in Qt API
if (presenter()->localizeNumbers()) {
if (!labelFormatMatcherLocalized)
labelFormatMatcherLocalized
= new QRegExp(QString::fromLatin1(labelFormatMatchLocalizedString));
if (labelFormatMatcherLocalized->indexIn(format, 0) != -1) {
preStr = labelFormatMatcherLocalized->cap(1);
if (!labelFormatMatcherLocalized->cap(2).isEmpty())
precision = labelFormatMatcherLocalized->cap(2).toInt();
formatSpec = labelFormatMatcherLocalized->cap(3);
postStr = labelFormatMatcherLocalized->cap(4);
}
} else {
if (!labelFormatMatcher)
labelFormatMatcher = new QRegExp(QString::fromLatin1(labelFormatMatchString));
if (labelFormatMatcher->indexIn(format, 0) != -1)
formatSpec = labelFormatMatcher->cap(1);
}
for (int i = 0; i < ticks; i++) {
qreal value = min + (i * (max - min) / (ticks - 1));
labels << formatLabel(formatSpec, array, value, precision, preStr, postStr);
}
}
return labels;
}
QStringList ChartAxisElement::createLogValueLabels(qreal min, qreal max, qreal base, int ticks,
const QString &format) const
{
QStringList labels;
if (max <= min || ticks < 1)
return labels;
int firstTick;
if (base > 1)
firstTick = qCeil(std::log10(min) / std::log10(base));
else
firstTick = qCeil(std::log10(max) / std::log10(base));
if (format.isNull()) {
int n = 0;
if (ticks > 1)
n = qMax(int(-qFloor(std::log10((max - min) / (ticks - 1)))), 0);
n++;
for (int i = firstTick; i < ticks + firstTick; i++) {
qreal value = qPow(base, i);
labels << presenter()->numberToString(value, 'f', n);
}
} else {
QByteArray array = format.toLatin1();
QString formatSpec;
QString preStr;
QString postStr;
int precision = 6; // Six is the default precision in Qt API
if (presenter()->localizeNumbers()) {
if (!labelFormatMatcherLocalized)
labelFormatMatcherLocalized =
new QRegExp(QString::fromLatin1(labelFormatMatchLocalizedString));
if (labelFormatMatcherLocalized->indexIn(format, 0) != -1) {
preStr = labelFormatMatcherLocalized->cap(1);
if (!labelFormatMatcherLocalized->cap(2).isEmpty())
precision = labelFormatMatcherLocalized->cap(2).toInt();
formatSpec = labelFormatMatcherLocalized->cap(3);
postStr = labelFormatMatcherLocalized->cap(4);
}
} else {
if (!labelFormatMatcher)
labelFormatMatcher = new QRegExp(QString::fromLatin1(labelFormatMatchString));
if (labelFormatMatcher->indexIn(format, 0) != -1)
formatSpec = labelFormatMatcher->cap(1);
}
for (int i = firstTick; i < ticks + firstTick; i++) {
qreal value = qPow(base, i);
labels << formatLabel(formatSpec, array, value, precision, preStr, postStr);
}
}
return labels;
}
QStringList ChartAxisElement::createDateTimeLabels(qreal min, qreal max,int ticks,
const QString &format) const
{
QStringList labels;
if (max <= min || ticks < 1)
return labels;
int n = qMax(int(-qFloor(std::log10((max - min) / (ticks - 1)))), 0);
n++;
for (int i = 0; i < ticks; i++) {
qreal value = min + (i * (max - min) / (ticks - 1));
labels << presenter()->locale().toString(QDateTime::fromMSecsSinceEpoch(value), format);
}
return labels;
}
void ChartAxisElement::axisSelected()
{
emit clicked();
}
#include "moc_chartaxiselement_p.cpp"
QT_CHARTS_END_NAMESPACE