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  1. Qt
  2. QTBUG-76025 Specify the QML language and write a QML-to-C++ compiler
  3. QTBUG-112876

qmlsc: Support Qt.binding()

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      Yes, it's technically an untyped JavaScript function... but could we check the type of the property instead?

       

      Code

      import QtQuick
import QtQuick.Controls.Basic

Window {
    id: root
    width: 300
    height: 200
    visible: true

    property color myColor: "green"

    Column {
        Rectangle {
            id: rectangle
            width: 100
            height: 100
            color: "red"
            border.color: "black"
            border.width: 5
        }    
        Button {
            text: "Update color binding"
            onClicked: rectangle.color = Qt.binding(function() {return root.myColor})
        }
    }
}

       

      Compiler output

      Warning: main.qml:23:33: Could not compile binding for onClicked: Cannot generate efficient code for LoadClosure [compiler]
            onClicked: rectangle.color = Qt.binding(function() {return root.myColor})
                                         ^^

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            qtqmlteam Qt Qml Team User
            skoh-qt Sze Howe Koh
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              Created:
              Updated:

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