mirror of https://github.com/qt/qtdatavis3d.git
129 lines
4.0 KiB
C++
129 lines
4.0 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the Qt Data Visualization module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:GPL$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 or (at your option) any later version
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** approved by the KDE Free Qt Foundation. The licenses are as published by
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** the Free Software Foundation and appearing in the file LICENSE.GPL3
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "highlightseries.h"
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//! [2]
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const float darkRedPos = 1.0f;
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const float redPos = 0.8f;
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const float yellowPos = 0.6f;
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const float greenPos = 0.4f;
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const float darkGreenPos = 0.2f;
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//! [2]
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HighlightSeries::HighlightSeries()
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: m_width(100),
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m_height(100)
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{
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setDrawMode(QSurface3DSeries::DrawSurface);
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setFlatShadingEnabled(true);
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setVisible(false);
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}
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HighlightSeries::~HighlightSeries()
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{
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}
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//! [0]
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void HighlightSeries::setTopographicSeries(TopographicSeries *series)
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{
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m_topographicSeries = series;
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m_srcWidth = m_topographicSeries->dataProxy()->array()->at(0)->size();
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m_srcHeight = m_topographicSeries->dataProxy()->array()->size();
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QObject::connect(m_topographicSeries, &QSurface3DSeries::selectedPointChanged,
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this, &HighlightSeries::handlePositionChange);
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}
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//! [0]
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//! [1]
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void HighlightSeries::handlePositionChange(const QPoint &position)
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{
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m_position = position;
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if (position == invalidSelectionPosition()) {
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setVisible(false);
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return;
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}
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int halfWidth = m_width / 2;
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int halfHeight = m_height / 2;
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int startX = position.y() - halfWidth;
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if (startX < 0 )
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startX = 0;
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int endX = position.y() + halfWidth;
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if (endX > (m_srcWidth - 1))
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endX = m_srcWidth - 1;
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int startZ = position.x() - halfHeight;
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if (startZ < 0 )
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startZ = 0;
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int endZ = position.x() + halfHeight;
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if (endZ > (m_srcHeight - 1))
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endZ = m_srcHeight - 1;
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QSurfaceDataProxy *srcProxy = m_topographicSeries->dataProxy();
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const QSurfaceDataArray &srcArray = *srcProxy->array();
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QSurfaceDataArray *dataArray = new QSurfaceDataArray;
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dataArray->reserve(endZ - startZ);
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for (int i = startZ; i < endZ; i++) {
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QSurfaceDataRow *newRow = new QSurfaceDataRow(endX - startX);
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QSurfaceDataRow *srcRow = srcArray.at(i);
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for (int j = startX, p = 0; j < endX; j++, p++) {
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QVector3D pos = srcRow->at(j).position();
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(*newRow)[p].setPosition(QVector3D(pos.x(), pos.y() + 0.1f, pos.z()));
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}
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*dataArray << newRow;
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}
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dataProxy()->resetArray(dataArray);
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setVisible(true);
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}
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//! [1]
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//! [3]
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void HighlightSeries::handleGradientChange(float value)
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{
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float ratio = m_minHeight / value;
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QLinearGradient gr;
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gr.setColorAt(0.0f, Qt::black);
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gr.setColorAt(darkGreenPos * ratio, Qt::darkGreen);
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gr.setColorAt(greenPos * ratio, Qt::green);
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gr.setColorAt(yellowPos * ratio, Qt::yellow);
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gr.setColorAt(redPos * ratio, Qt::red);
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gr.setColorAt(darkRedPos * ratio, Qt::darkRed);
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setBaseGradient(gr);
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setColorStyle(Q3DTheme::ColorStyleRangeGradient);
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}
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//! [3]
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