Poor graphic performance in drag element

[cochise]

I'm playng with Qt Quick and made a "mdi" interface.
Actualy only rectangles with drag enaled.

But the drag is in not smoot and consume a lot of cpu.
I don't have the best GPU (intel 945GME) or GPU (Atom n270) here, bur drag 3 rectangles inside othr is not a hard task.
Anyone know what is the problem?

@
TitleBar{
id: titlebar
width: 120
height: 24
color: "#444"

    MouseArea{
        anchors.fill: parent
        drag.target: titlebar
        drag.axis: Drag.XandYAxis
        drag.minimumX: 0
        drag.minimumY: 0
    }

    Rectangle{
        id:maxButton
        color: "#FFF"
        width: 20
        height: 20
        anchors.right: parent.right

        MouseArea{
            anchors.fill: parent
            onClicked: window.state = "maximized"
        }
    }
 }

Rectangle{
    id: box
    width: 250
    height: 250
    x: titlebar.x
    y: titlebar.y+titlebar.height
}

}
@

[cochise]

Well...
The problem is in the Qt part of the code. Maybe QDeclarativeView.
Running the QML file with qmlviewr the velocity is ok. Compiling the project i have a lt of lag.

I create the app with the template Qt Quick Application of qtcreator 2.1 beta 2.

I will read the qmlapplicationviwer to find the problem

[mario]

You also have some performance hints at this page: http://doc.qt.nokia.com/4.7/qdeclarativeperformance.html

[cochise]

thanks.
I will see the setGraphicsSystem