Hillshade renderer

// [WriteFile Name=Hillshade_Renderer, Category=Layers]
// [Legal]
// Copyright 2016 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [Legal]

#ifdef PCH_BUILD
#include "pch.hpp"
#endif // PCH_BUILD

// sample headers
#include "Hillshade_Renderer.h"

// ArcGIS Maps SDK headers
#include "Basemap.h"
#include "HillshadeRenderer.h"
#include "Map.h"
#include "MapQuickView.h"
#include "MapTypes.h"
#include "MapViewTypes.h"
#include "Raster.h"
#include "RasterLayer.h"
#include "RasterTypes.h"

// Qt headers
#include <QFuture>
#include <QStandardPaths>
#include <QUrl>
#include <QtCore/qglobal.h>

using namespace Esri::ArcGISRuntime;

// helper method to get cross platform data path
namespace
{
QString defaultDataPath()
{
  QString dataPath;

#ifdef Q_OS_IOS
  dataPath = QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation);
#else
  dataPath = QStandardPaths::writableLocation(QStandardPaths::HomeLocation);
#endif

  return dataPath;
}
} // namespace

Hillshade_Renderer::Hillshade_Renderer(QQuickItem* parent /* = nullptr */):
  QQuickItem(parent)
{
}

Hillshade_Renderer::~Hillshade_Renderer() = default;

void Hillshade_Renderer::init()
{
  qmlRegisterType<MapQuickView>("Esri.Samples", 1, 0, "MapView");
  qmlRegisterType<Hillshade_Renderer>("Esri.Samples", 1, 0, "Hillshade_RendererSample");
}

void Hillshade_Renderer::componentComplete()
{
  QQuickItem::componentComplete();

  // find QML MapView component
  m_mapView = findChild<MapQuickView*>("mapView");
  m_mapView->setWrapAroundMode(WrapAroundMode::Disabled);

  // Create the raster and raster layer
  const QString dataPath = defaultDataPath() + "/ArcGIS/Runtime/Data/raster";
  Raster* raster = new Raster(dataPath + "/srtm.tiff", this);
  m_rasterLayer = new RasterLayer(raster, this);

  // Add the raster to the map
  Basemap* basemap = new Basemap(m_rasterLayer, this);
  Map* map = new Map(basemap, this);

  // zoom to the new layer once loaded
  connect(map, &Map::loadStatusChanged, this, [this](LoadStatus loadStatus)
  {
    if (loadStatus == LoadStatus::Loaded)
    {
      m_mapView->setViewpointScaleAsync(754479);
    }
  });
  m_mapView->setMap(map);

  //! [HillshadeRenderer apply to layer snippet]
  // Apply the hillshade renderer to the raster layer
  constexpr double altitude = 45.0;
  constexpr double azimuth = 315.0;
  constexpr double zFactor = 0.000016;
  constexpr SlopeType slopeType = SlopeType::None;
  constexpr double pixelSizeFactor = 1.0;
  constexpr double pixelSizePower = 1.0;
  constexpr int outputBitDepth = 8;
  HillshadeRenderer* hillshadeRenderer = new HillshadeRenderer(altitude, azimuth, zFactor, slopeType, pixelSizeFactor, pixelSizePower, outputBitDepth, this);
  m_rasterLayer->setRenderer(hillshadeRenderer);
  //! [HillshadeRenderer apply to layer snippet]
}

void Hillshade_Renderer::applyHillshadeRenderer(double altitude, double azimuth, int slope)
{
  // create the new renderer
  SlopeType slopeType = static_cast<SlopeType>(slope);
  HillshadeRenderer* hillshadeRenderer = new HillshadeRenderer(altitude, azimuth, 0.000016, slopeType, 1.0, 1.0, 8, this);

  // set the renderer on the layer
  m_rasterLayer->setRenderer(hillshadeRenderer);
}

// [WriteFile Name=Hillshade_Renderer, Category=Layers]
// [Legal]
// Copyright 2016 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [Legal]

#ifndef HILLSHADE_RENDERER_H
#define HILLSHADE_RENDERER_H

// Qt headers
#include <QQuickItem>

namespace Esri::ArcGISRuntime
{
  class MapQuickView;
  class RasterLayer;
}

class Hillshade_Renderer : public QQuickItem
{
  Q_OBJECT

public:
  explicit Hillshade_Renderer(QQuickItem* parent = nullptr);
  ~Hillshade_Renderer() override;

  void componentComplete() override;
  static void init();
  Q_INVOKABLE void applyHillshadeRenderer(double altitude, double azimuth, int slope);

private:
  Esri::ArcGISRuntime::MapQuickView* m_mapView = nullptr;
  Esri::ArcGISRuntime::RasterLayer* m_rasterLayer = nullptr;
};

#endif // HILLSHADE_RENDERER_H

// [WriteFile Name=Hillshade_Renderer, Category=Layers]
// [Legal]
// Copyright 2016 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [Legal]

import QtQuick
import QtQuick.Controls
import QtQuick.Layouts
import Esri.Samples

Rectangle {
    id: root
    color: "transparent"
    visible: false

    Rectangle {
        anchors.fill: parent
        color: "#60000000"
    }

    MouseArea {
        anchors.fill: parent
        onClicked: mouse => mouse.accepted = true
        onWheel: wheel => wheel.accepted = true
    }

    Rectangle {
        anchors.centerIn: parent
        width: childrenRect.width
        height: childrenRect.height
        color: "lightgrey"
        radius: 5
        border {
            color: "#4D4D4D"
            width: 1
        }

        GridLayout {
            columns: 2

            Text {
                Layout.margins: 5
                Layout.columnSpan: 2
                Layout.alignment: Qt.AlignHCenter
                text: "Hillshade Renderer Settings"
                font.weight: Font.DemiBold
            }

            Text {
                Layout.margins: 5
                text: "Altitude"
            }

            Slider {

                id: altitudeSlider
                Layout.margins: 5
                from: 0
                to: 90
            }

            Text {
                Layout.margins: 5
                text: "Azimuth"
            }

            Slider {
                id: azimuthSlider
                Layout.margins: 5
                from: 0
                to: 360
            }

            Text {
                Layout.margins: 5
                text: "Slope"
            }

            ComboBox {
                id: slopeBox
                property int modelWidth: 0
                Layout.minimumWidth: modelWidth + leftPadding + rightPadding + (indicator ? indicator.width : 10)
                Layout.margins: 5
                Layout.fillWidth: true
                model: HillshadeSlopeTypeModel{}
                textRole: "name"

                Component.onCompleted : {
                    for (let i = 0; i < model.count; ++i) {
                        metrics.text = model.get(i).name;
                        modelWidth = Math.max(modelWidth, metrics.width);
                    }
                }
                TextMetrics {
                    id: metrics
                    font: slopeBox.font
                }
            }

            Button {
                Layout.margins: 5
                Layout.columnSpan: 2
                Layout.alignment: Qt.AlignHCenter
                text: "Apply"
                onClicked: {
                    const altitude = altitudeSlider.value;
                    const azimuth = azimuthSlider.value;
                    const slope = slopeBox.model.get(slopeBox.currentIndex).value;
                    applyHillshadeRenderer(altitude, azimuth, slope);
                    root.visible = false;
                }
            }
        }
    }
}

// [WriteFile Name=Hillshade_Renderer, Category=Layers]
// [Legal]
// Copyright 2016 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [Legal]

import QtQuick

ListModel {
    ListElement {
        name: "None"
        value: -1
    }
    ListElement {
        name: "Degree"
        value: 0
    }
    ListElement {
        name: "Percent Rise"
        value: 1
    }
    ListElement {
        name: "Scaled"
        value: 2
    }
}

// [WriteFile Name=Hillshade_Renderer, Category=Layers]
// [Legal]
// Copyright 2016 Esri.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// [Legal]

import QtQuick
import QtQuick.Controls
import Esri.Samples

Hillshade_RendererSample {
    id: rootRectangle
    clip: true
    width: 800
    height: 600

    // add a mapView component
    MapView {
        anchors.fill: parent
        objectName: "mapView"

        Component.onCompleted: {
            // Set the focus on MapView to initially enable keyboard navigation
            forceActiveFocus();
        }
    }

    Button {
        anchors {
            horizontalCenter: parent.horizontalCenter
            bottom: parent.bottom
            bottomMargin: 25
        }
        text: "Edit Renderer"
        onClicked: hillshadeSettings.visible = true;
    }

    HillshadeSettings {
        id: hillshadeSettings
        anchors.fill: parent
    }
}