Qt 5.7 | Qt Data Visualization | Qt Quick 2 Surface Example | main.qml Example File

Qt 5.7.1 Reference Documentation

# main.qml Example File

qmlsurface/qml/qmlsurface/main.qml

      /****************************************************************************
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      ** Copyright (C) 2016 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
      **
      ** This file is part of the Qt Data Visualization module of the Qt Toolkit.
      **
      ** $QT_BEGIN_LICENSE:GPL$
      ** Commercial License Usage
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      ** Alternatively, this file may be used under the terms of the GNU
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      ** the Free Software Foundation and appearing in the file LICENSE.GPL3
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      import QtQuick 2.1
      import QtQuick.Layouts 1.0
      import QtDataVisualization 1.0
      import "."

      Rectangle {
          id: mainview
          width: 1024
          height: 768
          color: surfacePlot.theme.windowColor

          Data {
              id: surfaceData
          }

          Item {
              id: surfaceView
              width: mainview.width
              height: mainview.height
              anchors.top: mainview.top
              anchors.left: mainview.left

              ColorGradient {
                  id: surfaceGradient
                  ColorGradientStop { position: 0.0; color: "darkslategray" }
                  ColorGradientStop { id: middleGradient; position: 0.25; color: "peru" }
                  ColorGradientStop { position: 1.0; color: "red" }
              }

              Surface3D {
                  id: surfacePlot
                  width: surfaceView.width
                  height: surfaceView.height
                  theme: Theme3D {
                      type: Theme3D.ThemeStoneMoss
                      font.family: "STCaiyun"
                      font.pointSize: 35
                      colorStyle: Theme3D.ColorStyleRangeGradient
                      baseGradients: [surfaceGradient]
                  }
                  shadowQuality: AbstractGraph3D.ShadowQualityMedium
                  selectionMode: AbstractGraph3D.SelectionSlice | AbstractGraph3D.SelectionItemAndRow
                  scene.activeCamera.cameraPreset: Camera3D.CameraPresetIsometricLeft
                  axisY.min: 0.0
                  axisY.max: 500.0
                  axisX.segmentCount: 10
                  axisX.subSegmentCount: 2
                  axisX.labelFormat: "%i"
                  axisZ.segmentCount: 10
                  axisZ.subSegmentCount: 2
                  axisZ.labelFormat: "%i"
                  axisY.segmentCount: 5
                  axisY.subSegmentCount: 2
                  axisY.labelFormat: "%i"
                  axisY.title: "Height"
                  axisX.title: "Latitude"
                  axisZ.title: "Longitude"

                  Surface3DSeries {
                      id: surfaceSeries
                      flatShadingEnabled: false
                      drawMode: Surface3DSeries.DrawSurface

                      ItemModelSurfaceDataProxy {
                          itemModel: surfaceData.model
                          rowRole: "longitude"
                          columnRole: "latitude"
                          yPosRole: "height"
                      }
                      onDrawModeChanged: checkState()
                  }
                  Surface3DSeries {
                      id: heightSeries
                      flatShadingEnabled: false
                      drawMode: Surface3DSeries.DrawSurface
                      visible: false

                      HeightMapSurfaceDataProxy {
                          heightMapFile: ":/heightmaps/image"
                          // We don't want the default data values set by heightmap proxy.
                          minZValue: 30
                          maxZValue: 60
                          minXValue: 67
                          maxXValue: 97
                      }

                      onDrawModeChanged: checkState()
                  }
              }
          }

          RowLayout {
              id: buttonLayout
              anchors.top: parent.top
              anchors.left: parent.left
              anchors.right: parent.right
              opacity: 0.5

              NewButton {
                  id: surfaceGridToggle
                  Layout.fillWidth: true
                  Layout.fillHeight: true
                  text: "Show Surface Grid"
                  onClicked: {
                      if (surfaceSeries.drawMode & Surface3DSeries.DrawWireframe) {
                          surfaceSeries.drawMode &= ~Surface3DSeries.DrawWireframe;
                          heightSeries.drawMode &= ~Surface3DSeries.DrawWireframe;
                      } else {
                          surfaceSeries.drawMode |= Surface3DSeries.DrawWireframe;
                          heightSeries.drawMode |= Surface3DSeries.DrawWireframe;
                      }
                  }
              }

              NewButton {
                  id: surfaceToggle
                  Layout.fillWidth: true
                  Layout.fillHeight: true
                  text: "Hide Surface"
                  onClicked: {
                      if (surfaceSeries.drawMode & Surface3DSeries.DrawSurface) {
                          surfaceSeries.drawMode &= ~Surface3DSeries.DrawSurface;
                          heightSeries.drawMode &= ~Surface3DSeries.DrawSurface;
                      } else {
                          surfaceSeries.drawMode |= Surface3DSeries.DrawSurface;
                          heightSeries.drawMode |= Surface3DSeries.DrawSurface;
                      }
                  }
              }

              NewButton {
                  id: flatShadingToggle
                  Layout.fillWidth: true
                  Layout.fillHeight: true
                  text: surfaceSeries.flatShadingSupported ? "Show Flat" : "Flat not supported"
                  enabled: surfaceSeries.flatShadingSupported
                  onClicked: {
                      if (surfaceSeries.flatShadingEnabled === true) {
                          surfaceSeries.flatShadingEnabled = false;
                          heightSeries.flatShadingEnabled = false;
                          text = "Show Flat"
                      } else {
                          surfaceSeries.flatShadingEnabled = true;
                          heightSeries.flatShadingEnabled = true;
                          text = "Show Smooth"
                      }
                  }
              }

              NewButton {
                  id: backgroundToggle
                  Layout.fillWidth: true
                  Layout.fillHeight: true
                  text: "Hide Background"
                  onClicked: {
                      if (surfacePlot.theme.backgroundEnabled === true) {
                          surfacePlot.theme.backgroundEnabled = false;
                          text = "Show Background"
                      } else {
                          surfacePlot.theme.backgroundEnabled = true;
                          text = "Hide Background"
                      }
                  }
              }

              NewButton {
                  id: gridToggle
                  Layout.fillWidth: true
                  Layout.fillHeight: true
                  text: "Hide Grid"
                  onClicked: {
                      if (surfacePlot.theme.gridEnabled === true) {
                          surfacePlot.theme.gridEnabled = false;
                          text = "Show Grid"
                      } else {
                          surfacePlot.theme.gridEnabled = true;
                          text = "Hide Grid"
                      }
                  }
              }

              NewButton {
                  id: seriesToggle
                  Layout.fillWidth: true
                  Layout.fillHeight: true
                  text: "Switch to Height Map Series"
                  onClicked: {
                      if (surfaceSeries.visible === false) {
                          surfacePlot.axisY.max = 500.0
                          surfaceSeries.visible = true
                          heightSeries.visible = false
                          middleGradient.position = 0.25
                          text = "Switch to Height Map Series"
                      } else {
                          surfacePlot.axisY.max = 250.0
                          surfaceSeries.visible = false
                          heightSeries.visible = true
                          middleGradient.position = 0.50
                          text = "Switch to Item Model Series"
                      }
                  }
              }
          }

          function checkState() {
              if (surfaceSeries.drawMode & Surface3DSeries.DrawSurface)
                  surfaceToggle.text = "Hide Surface"
              else
                  surfaceToggle.text = "Show Surface"

              if (surfaceSeries.drawMode & Surface3DSeries.DrawWireframe)
                  surfaceGridToggle.text = "Hide Surface Grid"
              else
                  surfaceGridToggle.text = "Show Surface Grid"
          }
      }