ItemLayer QML Type

A layer containing dynamic Qt Quick Ultralite items. More...

• List of all members, including inherited members

Properties

• depth : enumeration
• platformId : int
• refreshInterval : int
• renderingHints : enumeration

Detailed Description

Defines a layer in which Qt Quick Ultralite items can be shown.

Using several item layers can help reduce memory usage by lowering bit depths or using smaller item layers instead of a single item layer. The later is used when there are significant gaps in the UI without any content.

It's also possible to use the refreshInterval property to reduce the frame rate of certain layers. This results in lower CPU and GPU utilization and ensures that animations in higher priority layers stay smooth.

ItemLayer items have to be contained inside Screen or SpriteLayer items.

Example usage:

Application {
    Screen {
        ItemLayer {
            width: 400
            height: 400

            depth: ItemLayer.Bpp16

            Rectangle {
                anchors.fill: parent
                color: "#3d464d"
            }

            Image {
                anchors.centerIn: parent
                source: "qrc:/images/hello.png"
            }
        }
    }
}

See also Application, Screen, ImageLayer, SpriteLayer, and Improving performance using hardware layers.

Property Documentation

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