Graph Gallery

 // Copyright (C) 2023 The Qt Company Ltd.
 // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause

 #include "graphmodifier.h"
 #include "rainfalldata.h"

 #include <QtCore/qmath.h>
 #include <QtGraphs/q3dscene.h>
 #include <QtGraphs/q3dtheme.h>
 #include <QtGraphs/qbar3dseries.h>
 #include <QtGraphs/qbardataproxy.h>
 #include <QtGraphs/qcategory3daxis.h>
 #include <QtGraphs/qvalue3daxis.h>
 #include <QtWidgets/qcombobox.h>

 using namespace Qt::StringLiterals;

 // TODO: Many of the values do not affect custom proxy series now - should be fixed

 GraphModifier::GraphModifier(Q3DBars *bargraph, QObject *parent)
     : QObject(parent)
     , m_graph(bargraph)
     ,
     m_temperatureAxis(new QValue3DAxis)
     , m_yearAxis(new QCategory3DAxis)
     , m_monthAxis(new QCategory3DAxis)
     , m_primarySeries(new QBar3DSeries)
     , m_secondarySeries(new QBar3DSeries)
     , m_celsiusString(u"°C"_s)
 {
     m_graph->setShadowQuality(QAbstract3DGraph::ShadowQuality::SoftMedium);
     m_graph->activeTheme()->setBackgroundEnabled(false);
     m_graph->activeTheme()->setFont(QFont("Times New Roman", m_fontSize));
     m_graph->activeTheme()->setLabelBackgroundEnabled(true);
     m_graph->setMultiSeriesUniform(true);

     m_months = {"January",
                 "February",
                 "March",
                 "April",
                 "May",
                 "June",
                 "July",
                 "August",
                 "September",
                 "October",
                 "November",
                 "December"};
     m_years = {"2015", "2016", "2017", "2018", "2019", "2020", "2021", "2022"};

     m_temperatureAxis->setTitle("Average temperature");
     m_temperatureAxis->setSegmentCount(m_segments);
     m_temperatureAxis->setSubSegmentCount(m_subSegments);
     m_temperatureAxis->setRange(m_minval, m_maxval);
     m_temperatureAxis->setLabelFormat(u"%.1f "_s + m_celsiusString);
     m_temperatureAxis->setLabelAutoRotation(30.0f);
     m_temperatureAxis->setTitleVisible(true);

     m_yearAxis->setTitle("Year");
     m_yearAxis->setLabelAutoRotation(30.0f);
     m_yearAxis->setTitleVisible(true);
     m_monthAxis->setTitle("Month");
     m_monthAxis->setLabelAutoRotation(30.0f);
     m_monthAxis->setTitleVisible(true);

     m_graph->setValueAxis(m_temperatureAxis);
     m_graph->setRowAxis(m_yearAxis);
     m_graph->setColumnAxis(m_monthAxis);

     m_primarySeries->setItemLabelFormat(u"Oulu - @colLabel @rowLabel: @valueLabel"_s);
     m_primarySeries->setMesh(QAbstract3DSeries::Mesh::BevelBar);
     m_primarySeries->setMeshSmooth(false);

     m_secondarySeries->setItemLabelFormat(u"Helsinki - @colLabel @rowLabel: @valueLabel"_s);
     m_secondarySeries->setMesh(QAbstract3DSeries::Mesh::BevelBar);
     m_secondarySeries->setMeshSmooth(false);
     m_secondarySeries->setVisible(false);

     m_graph->addSeries(m_primarySeries);
     m_graph->addSeries(m_secondarySeries);

     changePresetCamera();

     resetTemperatureData();

     // Set up property animations for zooming to the selected bar
     m_defaultAngleX = m_graph->cameraXRotation();
     m_defaultAngleY = m_graph->cameraYRotation();
     m_defaultZoom = m_graph->cameraZoomLevel();
     m_defaultTarget = m_graph->cameraTargetPosition();

     m_animationCameraX.setTargetObject(m_graph);
     m_animationCameraY.setTargetObject(m_graph);
     m_animationCameraZoom.setTargetObject(m_graph);
     m_animationCameraTarget.setTargetObject(m_graph);

     m_animationCameraX.setPropertyName("cameraXRotation");
     m_animationCameraY.setPropertyName("cameraYRotation");
     m_animationCameraZoom.setPropertyName("cameraZoomLevel");
     m_animationCameraTarget.setPropertyName("cameraTargetPosition");

     int duration = 1700;
     m_animationCameraX.setDuration(duration);
     m_animationCameraY.setDuration(duration);
     m_animationCameraZoom.setDuration(duration);
     m_animationCameraTarget.setDuration(duration);

     // The zoom always first zooms out above the graph and then zooms in
     qreal zoomOutFraction = 0.3;
     m_animationCameraX.setKeyValueAt(zoomOutFraction, QVariant::fromValue(0.0f));
     m_animationCameraY.setKeyValueAt(zoomOutFraction, QVariant::fromValue(90.0f));
     m_animationCameraZoom.setKeyValueAt(zoomOutFraction, QVariant::fromValue(50.0f));
     m_animationCameraTarget.setKeyValueAt(zoomOutFraction,
                                           QVariant::fromValue(QVector3D(0.0f, 0.0f, 0.0f)));

     m_customData = new RainfallData();
 }

 GraphModifier::~GraphModifier()
 {
     delete m_customData;
 }

 void GraphModifier::resetTemperatureData()
 {
     // Set up data
     static const float tempOulu[8][12] = {
         {-7.4f, -2.4f, 0.0f, 3.0f, 8.2f, 11.6f, 14.7f, 15.4f, 11.4f, 4.2f, 2.1f, -2.3f},     // 2015
         {-13.4f, -3.9f, -1.8f, 3.1f, 10.6f, 13.7f, 17.8f, 13.6f, 10.7f, 3.5f, -3.1f, -4.2f}, // 2016
         {-5.7f, -6.7f, -3.0f, -0.1f, 4.7f, 12.4f, 16.1f, 14.1f, 9.4f, 3.0f, -0.3f, -3.2f},  // 2017
         {-6.4f, -11.9f, -7.4f, 1.9f, 11.4f, 12.4f, 21.5f, 16.1f, 11.0f, 4.4f, 2.1f, -4.1f}, // 2018
         {-11.7f, -6.1f, -2.4f, 3.9f, 7.2f, 14.5f, 15.6f, 14.4f, 8.5f, 2.0f, -3.0f, -1.5f},  // 2019
         {-2.1f, -3.4f, -1.8f, 0.6f, 7.0f, 17.1f, 15.6f, 15.4f, 11.1f, 5.6f, 1.9f, -1.7f},   // 2020
         {-9.6f, -11.6f, -3.2f, 2.4f, 7.8f, 17.3f, 19.4f, 14.2f, 8.0f, 5.2f, -2.2f, -8.6f},  // 2021
         {-7.3f, -6.4f, -1.8f, 1.3f, 8.1f, 15.5f, 17.6f, 17.6f, 9.1f, 5.4f, -1.5f, -4.4f}    // 2022
     };

     static const float tempHelsinki[8][12] = {
         {-2.0f, -0.1f, 1.8f, 5.1f, 9.7f, 13.7f, 16.3f, 17.3f, 12.7f, 5.4f, 4.6f, 2.1f},     // 2015
         {-10.3f, -0.6f, 0.0f, 4.9f, 14.3f, 15.7f, 17.7f, 16.0f, 12.7f, 4.6f, -1.0f, -0.9f}, // 2016
         {-2.9f, -3.3f, 0.7f, 2.3f, 9.9f, 13.8f, 16.1f, 15.9f, 11.4f, 5.0f, 2.7f, 0.7f},     // 2017
         {-2.2f, -8.4f, -4.7f, 5.0f, 15.3f, 15.8f, 21.2f, 18.2f, 13.3f, 6.7f, 2.8f, -2.0f},  // 2018
         {-6.2f, -0.5f, -0.3f, 6.8f, 10.6f, 17.9f, 17.5f, 16.8f, 11.3f, 5.2f, 1.8f, 1.4f},   // 2019
         {1.9f, 0.5f, 1.7f, 4.5f, 9.5f, 18.4f, 16.5f, 16.8f, 13.0f, 8.2f, 4.4f, 0.9f},       // 2020
         {-4.7f, -8.1f, -0.9f, 4.5f, 10.4f, 19.2f, 20.9f, 15.4f, 9.5f, 8.0f, 1.5f, -6.7f},   // 2021
         {-3.3f, -2.2f, -0.2f, 3.3f, 9.6f, 16.9f, 18.1f, 18.9f, 9.2f, 7.6f, 2.3f, -3.4f}     // 2022
     };

     // Create data arrays
     QBarDataArray dataSet;
     QBarDataArray dataSet2;

     dataSet.reserve(m_years.size());
     for (qsizetype year = 0; year < m_years.size(); ++year) {
         // Create a data row
         QBarDataRow dataRow(m_months.size());
         QBarDataRow dataRow2(m_months.size());
         for (qsizetype month = 0; month < m_months.size(); ++month) {
             // Add data to the row
             dataRow[month].setValue(tempOulu[year][month]);
             dataRow2[month].setValue(tempHelsinki[year][month]);
         }
         // Add the row to the set
         dataSet.append(dataRow);
         dataSet2.append(dataRow2);
     }

     // Add data to the data proxy (the data proxy assumes ownership of it)
     m_primarySeries->dataProxy()->resetArray(dataSet, m_years, m_months);
     m_secondarySeries->dataProxy()->resetArray(dataSet2, m_years, m_months);
 }

 void GraphModifier::changeRange(int range)
 {
     if (range >= m_years.count())
         m_yearAxis->setRange(0, m_years.count() - 1);
     else
         m_yearAxis->setRange(range, range);
 }

 void GraphModifier::changeStyle(int style)
 {
     QComboBox *comboBox = qobject_cast<QComboBox *>(sender());
     if (comboBox) {
         m_barMesh = comboBox->itemData(style).value<QAbstract3DSeries::Mesh>();
         m_primarySeries->setMesh(m_barMesh);
         m_secondarySeries->setMesh(m_barMesh);
         m_customData->customSeries()->setMesh(m_barMesh);
         if (m_barMesh == QAbstract3DSeries::Mesh::UserDefined) {
             m_primarySeries->setUserDefinedMesh(":/data/narrowarrow.mesh");
             m_secondarySeries->setUserDefinedMesh(":/data/narrowarrow.mesh");
             m_customData->customSeries()->setUserDefinedMesh(":/data/narrowarrow.mesh");
         }
     }
 }

 void GraphModifier::changePresetCamera()
 {
     m_animationCameraX.stop();
     m_animationCameraY.stop();
     m_animationCameraZoom.stop();
     m_animationCameraTarget.stop();

     // Restore camera target in case animation has changed it
     m_graph->setCameraTargetPosition(QVector3D(0.0f, 0.0f, 0.0f));

     static int preset = int(QAbstract3DGraph::CameraPreset::Front);

     m_graph->setCameraPreset((QAbstract3DGraph::CameraPreset) preset);

     if (++preset > int(QAbstract3DGraph::CameraPreset::DirectlyBelow))
         preset = int(QAbstract3DGraph::CameraPreset::FrontLow);
 }

 void GraphModifier::changeTheme(int theme)
 {
     Q3DTheme *currentTheme = m_graph->activeTheme();
     currentTheme->setType(Q3DTheme::Theme(theme));
     emit backgroundEnabledChanged(currentTheme->isBackgroundEnabled());
     emit gridEnabledChanged(currentTheme->isGridEnabled());
     emit fontChanged(currentTheme->font());
     emit fontSizeChanged(currentTheme->font().pointSize());
 }

 void GraphModifier::changeLabelBackground()
 {
     m_graph->activeTheme()->setLabelBackgroundEnabled(
         !m_graph->activeTheme()->isLabelBackgroundEnabled());
 }

 void GraphModifier::changeSelectionMode(int selectionMode)
 {
     QComboBox *comboBox = qobject_cast<QComboBox *>(sender());
     if (comboBox) {
         int flags = comboBox->itemData(selectionMode).toInt();
         m_graph->setSelectionMode(QAbstract3DGraph::SelectionFlags(flags));
     }
 }

 void GraphModifier::changeFont(const QFont &font)
 {
     QFont newFont = font;
     m_graph->activeTheme()->setFont(newFont);
 }

 void GraphModifier::changeFontSize(int fontsize)
 {
     m_fontSize = fontsize;
     QFont font = m_graph->activeTheme()->font();
     font.setPointSize(m_fontSize);
     m_graph->activeTheme()->setFont(font);
 }

 void GraphModifier::shadowQualityUpdatedByVisual(QAbstract3DGraph::ShadowQuality sq)
 {
     int quality = int(sq);
     // Updates the UI component to show correct shadow quality
     emit shadowQualityChanged(quality);
 }

 void GraphModifier::changeLabelRotation(int rotation)
 {
     m_temperatureAxis->setLabelAutoRotation(float(rotation));
     m_monthAxis->setLabelAutoRotation(float(rotation));
     m_yearAxis->setLabelAutoRotation(float(rotation));
 }

 void GraphModifier::setAxisTitleVisibility(bool enabled)
 {
     m_temperatureAxis->setTitleVisible(enabled);
     m_monthAxis->setTitleVisible(enabled);
     m_yearAxis->setTitleVisible(enabled);
 }

 void GraphModifier::setAxisTitleFixed(bool enabled)
 {
     m_temperatureAxis->setTitleFixed(enabled);
     m_monthAxis->setTitleFixed(enabled);
     m_yearAxis->setTitleFixed(enabled);
 }

 void GraphModifier::zoomToSelectedBar()
 {
     m_animationCameraX.stop();
     m_animationCameraY.stop();
     m_animationCameraZoom.stop();
     m_animationCameraTarget.stop();

     float currentX = m_graph->cameraXRotation();
     float currentY = m_graph->cameraYRotation();
     float currentZoom = m_graph->cameraZoomLevel();
     QVector3D currentTarget = m_graph->cameraTargetPosition();

     m_animationCameraX.setStartValue(QVariant::fromValue(currentX));
     m_animationCameraY.setStartValue(QVariant::fromValue(currentY));
     m_animationCameraZoom.setStartValue(QVariant::fromValue(currentZoom));
     m_animationCameraTarget.setStartValue(QVariant::fromValue(currentTarget));

     QPoint selectedBar = m_graph->selectedSeries() ? m_graph->selectedSeries()->selectedBar()
                                                    : QBar3DSeries::invalidSelectionPosition();

     if (selectedBar != QBar3DSeries::invalidSelectionPosition()) {
         // Normalize selected bar position within axis range to determine target coordinates
         QVector3D endTarget;
         float xMin = m_graph->columnAxis()->min();
         float xRange = m_graph->columnAxis()->max() - xMin;
         float zMin = m_graph->rowAxis()->min();
         float zRange = m_graph->rowAxis()->max() - zMin;
         endTarget.setX((selectedBar.y() - xMin) / xRange * 2.0f - 1.0f);
         endTarget.setZ((selectedBar.x() - zMin) / zRange * 2.0f - 1.0f);

         // Rotate the camera so that it always points approximately to the graph center
         qreal endAngleX = 90.0 - qRadiansToDegrees(qAtan(qreal(endTarget.z() / endTarget.x())));
         if (endTarget.x() > 0.0f)
             endAngleX -= 180.0f;
         float barValue = m_graph->selectedSeries()
                              ->dataProxy()
                              ->itemAt(selectedBar.x(), selectedBar.y())
                              .value();
         float endAngleY = barValue >= 0.0f ? 30.0f : -30.0f;
         if (m_graph->valueAxis()->reversed())
             endAngleY *= -1.0f;

         m_animationCameraX.setEndValue(QVariant::fromValue(float(endAngleX)));
         m_animationCameraY.setEndValue(QVariant::fromValue(endAngleY));
         m_animationCameraZoom.setEndValue(QVariant::fromValue(100));
         m_animationCameraTarget.setEndValue(QVariant::fromValue(endTarget));
     } else {
         // No selected bar, so return to the default view
         m_animationCameraX.setEndValue(QVariant::fromValue(m_defaultAngleX));
         m_animationCameraY.setEndValue(QVariant::fromValue(m_defaultAngleY));
         m_animationCameraZoom.setEndValue(QVariant::fromValue(m_defaultZoom));
         m_animationCameraTarget.setEndValue(QVariant::fromValue(m_defaultTarget));
     }

     m_animationCameraX.start();
     m_animationCameraY.start();
     m_animationCameraZoom.start();
     m_animationCameraTarget.start();
 }

 void GraphModifier::setDataModeToWeather(bool enabled)
 {
     if (enabled)
         changeDataMode(false);
 }

 void GraphModifier::setDataModeToCustom(bool enabled)
 {
     if (enabled)
         changeDataMode(true);
 }

 void GraphModifier::changeShadowQuality(int quality)
 {
     QAbstract3DGraph::ShadowQuality sq = QAbstract3DGraph::ShadowQuality(quality);
     m_graph->setShadowQuality(sq);
     emit shadowQualityChanged(quality);
 }

 void GraphModifier::rotateX(int rotation)
 {
     m_xRotation = rotation;
     m_graph->setCameraPosition(m_xRotation, m_yRotation);
 }

 void GraphModifier::rotateY(int rotation)
 {
     m_yRotation = rotation;
     m_graph->setCameraPosition(m_xRotation, m_yRotation);
 }

 void GraphModifier::setBackgroundEnabled(int enabled)
 {
     m_graph->activeTheme()->setBackgroundEnabled(bool(enabled));
 }

 void GraphModifier::setGridEnabled(int enabled)
 {
     m_graph->activeTheme()->setGridEnabled(bool(enabled));
 }

 void GraphModifier::setSmoothBars(int smooth)
 {
     m_smooth = bool(smooth);
     m_primarySeries->setMeshSmooth(m_smooth);
     m_secondarySeries->setMeshSmooth(m_smooth);
     m_customData->customSeries()->setMeshSmooth(m_smooth);
 }

 void GraphModifier::setSeriesVisibility(int enabled)
 {
     m_secondarySeries->setVisible(bool(enabled));
 }

 void GraphModifier::setReverseValueAxis(int enabled)
 {
     m_graph->valueAxis()->setReversed(enabled);
 }

 void GraphModifier::changeDataMode(bool customData)
 {
     int enabled = false;
     // Change between weather data and data from custom proxy
     if (customData) {
         m_graph->removeSeries(m_primarySeries);
         m_graph->removeSeries(m_secondarySeries);
         m_graph->addSeries(m_customData->customSeries());
         if (m_graph->valueAxis()->reversed())
             enabled = true;
         m_graph->setValueAxis(m_customData->valueAxis());
         m_graph->setRowAxis(m_customData->rowAxis());
         m_graph->setColumnAxis(m_customData->colAxis());
     } else {
         m_graph->removeSeries(m_customData->customSeries());
         m_graph->addSeries(m_primarySeries);
         m_graph->addSeries(m_secondarySeries);
         if (m_graph->valueAxis()->reversed())
             enabled = true;
         m_graph->setValueAxis(m_temperatureAxis);
         m_graph->setRowAxis(m_yearAxis);
         m_graph->setColumnAxis(m_monthAxis);
     }
     setReverseValueAxis(enabled);
 }