main.qml Example File

spanning-screens/main.qml
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 import QtQuick 2.6
 import QtQuick.Window 2.3
 import QtWayland.Compositor 1.3

 WaylandCompositor {
     WaylandOutput {
         sizeFollowsWindow: true
         window: Window {
             id: topSurfaceArea

             property int pixelHeight: screen.devicePixelRatio * height
             property int pixelWidth: screen.devicePixelRatio * width

             width: 1024
             height: 768
             visible: true
             color: "#1337af"

             Text { text: "Top screen" }

             // Enable the following to make the output target an actual screen,
             // for example when running on eglfs in a multi-display embedded system.

             // screen: Qt.application.screens[0]
         }
     }

     WaylandOutput {
         sizeFollowsWindow: true
         window: Window {
             id: bottomSurfaceArea

             property int pixelHeight: screen.devicePixelRatio * height
             property int pixelWidth: screen.devicePixelRatio * width

             width: 1024
             height: 768
             visible: true
             color: "#1abacc"

             Text { text: "Bottom screen" }

             // Enable the following to make the output target an actual screen,
             // for example when running on eglfs in a multi-display embedded system.

             // screen: Qt.application.screens[1]
         }
     }

     Component {
         id: chromeComponent
         ShellSurfaceItem {
             autoCreatePopupItems: true
             onSurfaceDestroyed: destroy()
         }
     }

     XdgShell {
         onToplevelCreated: {
             const shellSurface = xdgSurface;

             const topItem = chromeComponent.createObject(topSurfaceArea, {
                 shellSurface
             });

             const bottomItem = chromeComponent.createObject(bottomSurfaceArea, {
                 shellSurface,
                 y: Qt.binding(function() { return -topSurfaceArea.height;})
             });

             const height = topSurfaceArea.pixelHeight + bottomSurfaceArea.pixelHeight;
             const width = Math.max(bottomSurfaceArea.pixelWidth, topSurfaceArea.pixelWidth);
             const size = Qt.size(width, height);
             toplevel.sendFullscreen(size);
         }
     }
 }