import QtQuick 2.4
import QtQuick.Window 2.0
import QtQuick.Controls 1.2
import QtQuick.Layouts 1.1

Window {
    id: mainWindow
    width: 600
    height: 600
    visible: true

    ColumnLayout
    {
        width: parent ? parent.width : 200
        Label
        {
            Layout.fillWidth: true
            text: "<h2>MyApp</h2>"
            horizontalAlignment: Text.AlignHCenter
        }
        RowLayout
        {
            Layout.fillWidth: true
            Layout.fillHeight: true
            Label
            {
                Layout.fillWidth: true
                text: "Show hidden text"
            }
            Switch
            {
                id: someswitch
                checked: false
            }
        }
        Label
        {
            id: myText
            text: "dummy"
            wrapMode: Text.WordWrap
            clip: true
            Layout.fillWidth: true
            Layout.preferredHeight: implicitHeight

            states:
                [
                State
                {
                    name: "invisible"
                    when: !someswitch.checked
                    PropertyChanges { target: myText; Layout.preferredHeight: 0 }
                }
            ]

            Behavior on Layout.preferredHeight
            {
                NumberAnimation { duration: 100 }
            }
        }
    }
}