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  1. Qt
  2. QTBUG-24487

Allow multi-line srings in javascript blocks

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    Description

      QML developers will not have a clear understanding of the boundaries between QML and javascript code in QML files.

      While allowing multiline strings in QML is clearly beneficial, it can also be very confusing when a developer finds that multiline strings can be used in some contexts but not in others, that appear to be equivalent. In the following function, it appears that the three object creation contexts are equivalent, while in fact one of the three does not permit multiline strings:

      import QtQuick 2.0

Item {
    id: root;

    property var t1: null
    property var t2: null
    property var t3: null

    function doCreate() {
        return Qt.createQmlObject("import QtQuick 2.0;
                                   Item {
                                       objectName: 'test3';
                                   }", root);
    }

    Component.onCompleted: {
        t1 = Qt.createQmlObject("import QtQuick 2.0;
                                      Item {
                                          objectName: 'test1';
                                      }", root);
        console.log(t1.objectName);

        function doNestedCreate() {
            return Qt.createQmlObject("import QtQuick 2.0;
                                       Item {
                                           objectName: 'test2';
                                       }", root);
        }

        t2 = doNestedCreate();
        console.log(t2.objectName);

        t3 = doCreate();
        console.log(t3.objectName);
    }
}

      Pre-processing multiline strings inside javascript blocks in QML woud alleviate this confusion.

      Attachments

        1. test.qml
          1 kB
          Matthew Vogt (closed Nokia identity)

        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-22344 createQmlObject crashes under various circumstances

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
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              Unassigned Unassigned
              mvogt Matthew Vogt (closed Nokia identity) (Inactive)
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              Dates

                Created:
                Updated:

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