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29
30#include "highlightseries.h"
31
32using namespace QtDataVisualization;
33
34//! [2]
35const float darkRedPos = 1.0f;
36const float redPos = 0.8f;
37const float yellowPos = 0.6f;
38const float greenPos = 0.4f;
39const float darkGreenPos = 0.2f;
40//! [2]
41
42HighlightSeries::HighlightSeries()
43 : m_width(100),
44 m_height(100)
45{
46 setDrawMode(QSurface3DSeries::DrawSurface);
47 setFlatShadingEnabled(true);
48 setVisible(false);
49}
50
51HighlightSeries::~HighlightSeries()
52{
53}
54
55//! [0]
56void HighlightSeries::setTopographicSeries(TopographicSeries *series)
57{
58 m_topographicSeries = series;
59 m_srcWidth = m_topographicSeries->dataProxy()->array()->at(i: 0)->size();
60 m_srcHeight = m_topographicSeries->dataProxy()->array()->size();
61
62 QObject::connect(sender: m_topographicSeries, signal: &QSurface3DSeries::selectedPointChanged,
63 receiver: this, slot: &HighlightSeries::handlePositionChange);
64}
65//! [0]
66
67//! [1]
68void HighlightSeries::handlePositionChange(const QPoint &position)
69{
70 m_position = position;
71
72 if (position == invalidSelectionPosition()) {
73 setVisible(false);
74
75 return;
76 }
77
78 int halfWidth = m_width / 2;
79 int halfHeight = m_height / 2;
80
81 int startX = position.y() - halfWidth;
82 if (startX < 0 )
83 startX = 0;
84 int endX = position.y() + halfWidth;
85 if (endX > (m_srcWidth - 1))
86 endX = m_srcWidth - 1;
87 int startZ = position.x() - halfHeight;
88 if (startZ < 0 )
89 startZ = 0;
90 int endZ = position.x() + halfHeight;
91 if (endZ > (m_srcHeight - 1))
92 endZ = m_srcHeight - 1;
93
94 QSurfaceDataProxy *srcProxy = m_topographicSeries->dataProxy();
95 const QSurfaceDataArray &srcArray = *srcProxy->array();
96
97 QSurfaceDataArray *dataArray = new QSurfaceDataArray;
98 dataArray->reserve(alloc: endZ - startZ);
99 for (int i = startZ; i < endZ; i++) {
100 QSurfaceDataRow *newRow = new QSurfaceDataRow(endX - startX);
101 QSurfaceDataRow *srcRow = srcArray.at(i);
102 for (int j = startX, p = 0; j < endX; j++, p++) {
103 QVector3D pos = srcRow->at(i: j).position();
104 (*newRow)[p].setPosition(QVector3D(pos.x(), pos.y() + 0.1f, pos.z()));
105 }
106 *dataArray << newRow;
107 }
108
109 dataProxy()->resetArray(newArray: dataArray);
110 setVisible(true);
111}
112//! [1]
113
114//! [3]
115void HighlightSeries::handleGradientChange(float value)
116{
117 float ratio = m_minHeight / value;
118
119 QLinearGradient gr;
120 gr.setColorAt(pos: 0.0f, color: Qt::black);
121 gr.setColorAt(pos: darkGreenPos * ratio, color: Qt::darkGreen);
122 gr.setColorAt(pos: greenPos * ratio, color: Qt::green);
123 gr.setColorAt(pos: yellowPos * ratio, color: Qt::yellow);
124 gr.setColorAt(pos: redPos * ratio, color: Qt::red);
125 gr.setColorAt(pos: darkRedPos * ratio, color: Qt::darkRed);
126
127 setBaseGradient(gr);
128 setColorStyle(Q3DTheme::ColorStyleRangeGradient);
129}
130//! [3]
131

source code of qtdatavis3d/examples/datavisualization/texturesurface/highlightseries.cpp