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Diffstat (limited to 'examples/datavisualization/graphgallery/highlightseries.cpp')
-rw-r--r-- | examples/datavisualization/graphgallery/highlightseries.cpp | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/examples/datavisualization/graphgallery/highlightseries.cpp b/examples/datavisualization/graphgallery/highlightseries.cpp new file mode 100644 index 00000000..3f10b421 --- /dev/null +++ b/examples/datavisualization/graphgallery/highlightseries.cpp @@ -0,0 +1,101 @@ +// 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); + setFlatShadingEnabled(true); + setVisible(false); +} + +HighlightSeries::~HighlightSeries() +{ +} + +//! [0] +void HighlightSeries::setTopographicSeries(TopographicSeries *series) +{ + m_topographicSeries = series; + m_srcWidth = m_topographicSeries->dataProxy()->array()->at(0)->size(); + m_srcHeight = m_topographicSeries->dataProxy()->array()->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.y() - halfWidth; + if (startX < 0 ) + startX = 0; + int endX = position.y() + halfWidth; + if (endX > (m_srcWidth - 1)) + endX = m_srcWidth - 1; + int startZ = position.x() - halfHeight; + if (startZ < 0 ) + startZ = 0; + int endZ = position.x() + halfHeight; + if (endZ > (m_srcHeight - 1)) + endZ = m_srcHeight - 1; + + QSurfaceDataProxy *srcProxy = m_topographicSeries->dataProxy(); + const QSurfaceDataArray &srcArray = *srcProxy->array(); + + auto *dataArray = new QSurfaceDataArray; + dataArray->reserve(endZ - startZ); + for (int i = startZ; i < endZ; ++i) { + auto *newRow = new QSurfaceDataRow; + 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() + 0.1f); + 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(Q3DTheme::ColorStyleRangeGradient); +} +//! [3] |