qml-attributes.md

property attributes

property type

• int
• real
• string
• list
• qml object type
• qml basic type

assign

• static value
• binding expression

property list

    property list<Rectangle> childRects: [
        Rectangle { color: "red" }
        Rectangle { color: "blue" }
    ]

property alias

can not have explict type specification

   property alias color: retangle.border.color
   Retangle {
        id: retangle
   }

readonly property

readonly property must assign a value and can not be changed

readonly property int someNumber: 10

signal attibutes

signal hanlder

* onClicked

defined signal attribute

signal handler attritute

Rectangle {
    signal activated(real xPosition, real yPosition)
    signal deactivated
    MouseArea {
        anchors.fill: parent
        onPressed: parent.activated(mouse.x, mouse.y)
        onReleased: parent.deactivated()
    }
    onActivated: console.log("Activated at" + xPosition + "," + yPosition)
    onDeactivated: console.log("Deactivated!")
}

property change signal handler

TextInput {
    text: "change this!"  
    onTextChanged: console.log("Text has changed to:", text)
}

method attributes

attached property and attached signal handlers

enumeration attributes