Uploaded image for project: 'Qt'
  1. Qt
  2. QTBUG-76025 Specify the QML language and write a QML-to-C++ compiler
  3. QTBUG-112876

qmlsc: Support Qt.binding()

    XMLWordPrintable

Details

    Description

      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})
                                         ^^

      Attachments

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-101531 qmlsc issue with change signal handler

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Technical task - A technical task. QTBUG-112603 StackView.find() cannot be compiled by qmlsc

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Reported

          Technical task - A technical task. QTBUG-101464 Support Qt.callLater

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Open
          No reviews matched the request. Check your Options in the drop-down menu of this sections header.

          Activity

            People

              qtqmlteam Qt Qml Team User
              skoh-qt Sze Howe Koh
              Votes:
              0 Vote for this issue
              Watchers:
              2 Start watching this issue

              Dates

                Created:
                Updated:

                Gerrit Reviews

                  There are no open Gerrit changes