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

Qt 5.7.1 Reference Documentation

# main.qml Example File

qmlmultigraph/qml/qmlmultigraph/main.qml

      /****************************************************************************
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      ** Copyright (C) 2016 The Qt Company Ltd.
      ** Contact: https://www.qt.io/licensing/
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      ** This file is part of the Qt Data Visualization module of the Qt Toolkit.
      **
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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: 800
          height: 600

          Data {
              id: data
          }

          GridLayout {
              id: gridLayout
              columns: 2
              Layout.fillHeight: true
              Layout.fillWidth: true
              anchors.top: mainView.top
              anchors.bottom: mainView.bottom
              anchors.left: mainView.left
              anchors.right: mainView.right

              Rectangle {
                  Layout.fillHeight: true
                  Layout.fillWidth: true
                  border.color: surfaceGraph.theme.gridLineColor
                  border.width: 2

                  Surface3D {
                      id: surfaceGraph
                      anchors.fill: parent
                      anchors.margins: parent.border.width
                      theme: Theme3D {
                          type: Theme3D.ThemePrimaryColors
                          font.pointSize: 60
                      }
                      scene.activeCamera.cameraPreset: Camera3D.CameraPresetIsometricLeftHigh

                      Surface3DSeries {
                          itemLabelFormat: "Pop density at (@xLabel N, @zLabel E): @yLabel"
                          ItemModelSurfaceDataProxy {
                              itemModel: data.sharedData
                              // The surface data points are not neatly lined up in rows and columns,
                              // so we define explicit row and column roles.
                              rowRole: "row"
                              columnRole: "col"
                              xPosRole: "latitude"
                              zPosRole: "longitude"
                              yPosRole: "pop_density"
                          }
                      }
                  }
              }

              // We'll use one grid cell for buttons
              Rectangle {
                  Layout.fillHeight: true
                  Layout.fillWidth: true

                  GridLayout {
                      anchors.right: parent.right
                      anchors.left: parent.left
                      anchors.top: parent.top
                      anchors.bottom: parent.bottom
                      columns: 2

                      NewButton {
                          Layout.minimumWidth: parent.width / 2
                          Layout.fillHeight: true
                          Layout.fillWidth: true
                          text: "Clear Selections"
                          onClicked: clearSelections() // call a helper function to keep button itself simpler
                      }

                      NewButton {
                          Layout.minimumWidth: parent.width / 2
                          Layout.fillHeight: true
                          Layout.fillWidth: true
                          text: "Quit"
                          onClicked: Qt.quit(0);
                      }

                      NewButton {
                          Layout.fillHeight: true
                          Layout.fillWidth: true
                          text: "Reset Cameras"
                          onClicked: resetCameras() // call a helper function to keep button itself simpler
                      }

                      NewButton {
                          Layout.fillHeight: true
                          Layout.fillWidth: true
                          text: "Toggle Mesh Styles"
                          onClicked: toggleMeshStyle() // call a helper function to keep button itself simpler
                      }
                  }
              }

              Rectangle {
                  Layout.fillHeight: true
                  Layout.fillWidth: true
                  border.color: scatterGraph.theme.gridLineColor
                  border.width: 2

                  Scatter3D {
                      id: scatterGraph
                      anchors.fill: parent
                      anchors.margins: parent.border.width
                      theme: Theme3D {
                          type: Theme3D.ThemeDigia
                          font.pointSize: 60
                      }
                      scene.activeCamera.cameraPreset: Camera3D.CameraPresetIsometricLeftHigh

                      Scatter3DSeries {
                          itemLabelFormat: "Pop density at (@xLabel N, @zLabel E): @yLabel"
                          ItemModelScatterDataProxy {
                              itemModel: data.sharedData
                              // Mapping model roles to scatter series item coordinates.
                              xPosRole: "latitude"
                              zPosRole: "longitude"
                              yPosRole: "pop_density"
                          }
                      }
                  }
              }

              Rectangle {
                  Layout.fillHeight: true
                  Layout.fillWidth: true
                  border.color: barGraph.theme.gridLineColor
                  border.width: 2

                  Bars3D {
                      id: barGraph
                      anchors.fill: parent
                      anchors.margins: parent.border.width
                      theme: Theme3D {
                          type: Theme3D.ThemeQt
                          font.pointSize: 60
                      }
                      selectionMode: AbstractGraph3D.SelectionItemAndRow | AbstractGraph3D.SelectionSlice
                      scene.activeCamera.cameraPreset: Camera3D.CameraPresetIsometricLeftHigh

                      Bar3DSeries {
                          itemLabelFormat: "@seriesName: @valueLabel"
                          name: "Population density"

                          ItemModelBarDataProxy {
                              itemModel: data.sharedData
                              // Mapping model roles to bar series rows, columns, and values.
                              rowRole: "row"
                              columnRole: "col"
                              valueRole: "pop_density"
                          }
                      }
                  }
              }
          }

          function clearSelections() {
              barGraph.clearSelection()
              scatterGraph.clearSelection()
              surfaceGraph.clearSelection()
          }

          function resetCameras() {
              surfaceGraph.scene.activeCamera.cameraPreset = Camera3D.CameraPresetIsometricLeftHigh
              scatterGraph.scene.activeCamera.cameraPreset = Camera3D.CameraPresetIsometricLeftHigh
              barGraph.scene.activeCamera.cameraPreset = Camera3D.CameraPresetIsometricLeftHigh
              surfaceGraph.scene.activeCamera.zoomLevel = 100.0
              scatterGraph.scene.activeCamera.zoomLevel = 100.0
              barGraph.scene.activeCamera.zoomLevel = 100.0
          }

          function toggleMeshStyle() {
              if (barGraph.seriesList[0].meshSmooth === true) {
                  barGraph.seriesList[0].meshSmooth = false
                  if (surfaceGraph.seriesList[0].flatShadingSupported)
                      surfaceGraph.seriesList[0].flatShadingEnabled = true
                  scatterGraph.seriesList[0].meshSmooth = false
              } else {
                  barGraph.seriesList[0].meshSmooth = true
                  surfaceGraph.seriesList[0].flatShadingEnabled = false
                  scatterGraph.seriesList[0].meshSmooth = true
              }
          }
      }