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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "customformatter.h"
#include <QtDataVisualization/qvalue3daxis.h>
#include <QtQml/qqmlextensionplugin.h>
static const qreal oneDayMs = 60.0 * 60.0 * 24.0 * 1000.0;
CustomFormatter::CustomFormatter(QObject *parent) :
QValue3DAxisFormatter(parent)
{
qRegisterMetaType<QValue3DAxisFormatter *>();
}
CustomFormatter::~CustomFormatter()
{
}
//! [1]
QValue3DAxisFormatter *CustomFormatter::createNewInstance() const
{
return new CustomFormatter();
}
void CustomFormatter::populateCopy(QValue3DAxisFormatter ©) const
{
QValue3DAxisFormatter::populateCopy(copy);
CustomFormatter *customFormatter = static_cast<CustomFormatter *>(©);
customFormatter->m_originDate = m_originDate;
customFormatter->m_selectionFormat = m_selectionFormat;
}
//! [1]
//! [2]
void CustomFormatter::recalculate()
{
// We want our axis to always have gridlines at date breaks
// Convert range into QDateTimes
QDateTime minTime = valueToDateTime(qreal(axis()->min()));
QDateTime maxTime = valueToDateTime(qreal(axis()->max()));
// Find out the grid counts
QTime midnight(0, 0);
QDateTime minFullDate(minTime.date(), midnight);
int gridCount = 0;
if (minFullDate != minTime)
minFullDate = minFullDate.addDays(1);
QDateTime maxFullDate(maxTime.date(), midnight);
gridCount += minFullDate.daysTo(maxFullDate) + 1;
int subGridCount = axis()->subSegmentCount() - 1;
// Reserve space for position arrays and label strings
gridPositions().resize(gridCount);
subGridPositions().resize((gridCount + 1) * subGridCount);
labelPositions().resize(gridCount);
labelStrings().reserve(gridCount);
// Calculate positions and format labels
qint64 startMs = minTime.toMSecsSinceEpoch();
qint64 endMs = maxTime.toMSecsSinceEpoch();
qreal dateNormalizer = endMs - startMs;
qreal firstLineOffset = (minFullDate.toMSecsSinceEpoch() - startMs) / dateNormalizer;
qreal segmentStep = oneDayMs / dateNormalizer;
qreal subSegmentStep = 0;
if (subGridCount > 0)
subSegmentStep = segmentStep / qreal(subGridCount + 1);
for (int i = 0; i < gridCount; i++) {
qreal gridValue = firstLineOffset + (segmentStep * qreal(i));
gridPositions()[i] = float(gridValue);
labelPositions()[i] = float(gridValue);
labelStrings() << minFullDate.addDays(i).toString(axis()->labelFormat());
}
for (int i = 0; i <= gridCount; i++) {
if (subGridPositions().size()) {
for (int j = 0; j < subGridCount; j++) {
float position;
if (i)
position = gridPositions().at(i - 1) + subSegmentStep * (j + 1);
else
position = gridPositions().at(0) - segmentStep + subSegmentStep * (j + 1);
if (position > 1.0f || position < 0.0f)
position = gridPositions().at(0);
subGridPositions()[i * subGridCount + j] = position;
}
}
}
}
//! [2]
//! [3]
QString CustomFormatter::stringForValue(qreal value, const QString &format) const
{
Q_UNUSED(format);
return valueToDateTime(value).toString(m_selectionFormat);
}
//! [3]
QDate CustomFormatter::originDate() const
{
return m_originDate;
}
QString CustomFormatter::selectionFormat() const
{
return m_selectionFormat;
}
void CustomFormatter::setOriginDate(QDate date)
{
if (m_originDate != date) {
m_originDate = date;
markDirty(true);
emit originDateChanged(date);
}
}
void CustomFormatter::setSelectionFormat(const QString &format)
{
if (m_selectionFormat != format) {
m_selectionFormat = format;
markDirty(true); // Necessary to regenerate already visible selection label
emit selectionFormatChanged(format);
}
}
//! [0]
QDateTime CustomFormatter::valueToDateTime(qreal value) const
{
return m_originDate.startOfDay().addMSecs(qint64(oneDayMs * value));
}
//! [0]
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