main.qml Example File

dynamicloading/main.qml
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 import QtQuick 2.12
 import QtStudio3D.OpenGL 2.5

 Item {
     id: mainview
     anchors.fill: parent
     visible: true

     StartupProgress {
         id: progress
     }
     Studio3D {
         id: studio3D
         anchors.fill: parent
         asyncInit: true

         ViewerSettings {
             showRenderStats: false
             scaleMode: ViewerSettings.ScaleModeCenter
         }
         Presentation {
             property string slidePath: "dynamicloading:Scene:Slide"
             property int curSlideIndex: 1
             property int maxSlideIndex: 3

             id: presentation
             delayedLoading: true
             source: "qrc:/presentation/dynamicloading.uia"

             onSlideEntered: {
                 console.log("Entered: " + name)

                 curSlideIndex = index + 1
                 if (curSlideIndex > maxSlideIndex)
                     curSlideIndex = 1
                 console.log("preloadSlide: " + slidePath + curSlideIndex)
                 preloadSlide(slidePath + curSlideIndex)
             }

             onSlideExited: {
                 console.log("Exited: " + name)
                 unloadSlide(name)
             }
         }
         onPresentationReady: progress.visible = false
     }
 }