Chrome.qml Example File

multi-screen/qml/Chrome.qml
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import QtQuick 2.0 import QtWayland.Compositor 1.0 Item { id: chrome property alias shellSurface: surfaceItem.shellSurface property alias surfaceItem: surfaceItem property alias moveItem: surfaceItem.moveItem x: surfaceItem.moveItem.x - surfaceItem.output.geometry.x y: surfaceItem.moveItem.y - surfaceItem.output.geometry.y ShellSurfaceItem { id: surfaceItem onSurfaceDestroyed: chrome.destroy(); } onXChanged: updatePrimary() onYChanged: updatePrimary() function updatePrimary() { var w = surfaceItem.width var h = surfaceItem.height var area = w * h; var screenW = surfaceItem.output.geometry.width; var screenH = surfaceItem.output.geometry.height; var x1 = Math.max(0, x); var y1 = Math.max(0, y); var x2 = Math.min(x + w, screenW); var y2 = Math.min(y + h, screenH); var w1 = Math.max(0, x2 - x1); var h1 = Math.max(0, y2 - y1); if (w1 * h1 * 2 > area) { surfaceItem.setPrimary(); } } }