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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "highlightseries.h"
//! [2]
const float darkRedPos = 1.f;
const float redPos = 0.8f;
const float yellowPos = 0.6f;
const float greenPos = 0.4f;
const float darkGreenPos = 0.2f;
//! [2]
HighlightSeries::HighlightSeries()
{
setDrawMode(QSurface3DSeries::DrawSurface);
setShading(QSurface3DSeries::Shading::Flat);
setVisible(false);
}
HighlightSeries::~HighlightSeries() = default;
//! [0]
void HighlightSeries::setTopographicSeries(TopographicSeries *series)
{
m_topographicSeries = series;
m_srcWidth = m_topographicSeries->dataArray().at(0).size();
m_srcHeight = m_topographicSeries->dataArray().size();
QObject::connect(m_topographicSeries,
&QSurface3DSeries::selectedPointChanged,
this,
&HighlightSeries::handlePositionChange);
}
//! [0]
//! [1]
void HighlightSeries::handlePositionChange(const QPoint &position)
{
m_position = position;
if (position == invalidSelectionPosition()) {
setVisible(false);
return;
}
int halfWidth = m_width / 2;
int halfHeight = m_height / 2;
int startX = position.x() - halfWidth;
if (startX < 0)
startX = 0;
int endX = position.x() + halfWidth;
if (endX > (m_srcWidth - 1))
endX = m_srcWidth - 1;
int startZ = position.y() - halfHeight;
if (startZ < 0)
startZ = 0;
int endZ = position.y() + halfHeight;
if (endZ > (m_srcHeight - 1))
endZ = m_srcHeight - 1;
const QSurfaceDataArray &srcArray = m_topographicSeries->dataArray();
QSurfaceDataArray dataArray;
dataArray.reserve(endZ - startZ);
for (int i = startZ; i < endZ; ++i) {
QSurfaceDataRow newRow;
newRow.reserve(endX - startX);
QSurfaceDataRow srcRow = srcArray.at(i);
for (int j = startX; j < endX; ++j) {
QVector3D pos = srcRow.at(j).position();
pos.setY(pos.y() + m_heightAdjustment);
newRow.append(QSurfaceDataItem(pos));
}
dataArray.append(newRow);
}
dataProxy()->resetArray(dataArray);
setVisible(true);
}
//! [1]
//! [3]
void HighlightSeries::handleGradientChange(float value)
{
float ratio = m_minHeight / value;
QLinearGradient gr;
gr.setColorAt(0.f, Qt::black);
gr.setColorAt(darkGreenPos * ratio, Qt::darkGreen);
gr.setColorAt(greenPos * ratio, Qt::green);
gr.setColorAt(yellowPos * ratio, Qt::yellow);
gr.setColorAt(redPos * ratio, Qt::red);
gr.setColorAt(darkRedPos * ratio, Qt::darkRed);
setBaseGradient(gr);
setColorStyle(QGraphsTheme::ColorStyle::RangeGradient);
handleZoomChange(ratio);
}
//! [3]
void HighlightSeries::handleZoomChange(float zoom)
{
m_heightAdjustment = (1.2f - zoom) * 10.f;
}
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