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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;
++ }