是否有可能从内部QML中继器(它们是嵌套的)到达外部QML中继器的索引的?

问题描述

我正在尝试在QML应用程序中动态构建相同类型项目的矩阵，并使其保持动态，以便您可以随时更改c ++文件中的行数和列数.这一直很好，但是现在，要单独访问它们，我想给它们提供动态名称.因此，我嵌套了两个转发器，并尝试如下设置objectName:

I am trying to dynamically build a matrix of the same type of items in my QML application and keep it dynamic, so that you can change the number of rows and columns in a c++ file anytime. This has been working well, but now, to access them individually, I want to give them dynamic names. Therefore I nested two repeaters and tried to set the objectName as in the following:

    Repeater{
        id: rows
        model: Matrix1.row //number of rows in Matrix1-Object

        Repeater{
            id: columns
            model: Matrix1.column //number of columns in Matrix1-Object

            RepeatedItem{
                objectName: (index) +"."+ (rows.index) //matrix elements are
                supposed to be numbered x.y because of the nested repeaters, e.g.
                0.0 for the first element
            }
        }
    }

不幸的是，我似乎无法访问外部索引.显示第一个值，第二个值由我的GUI的TextArea中的字符串 undefined 表示.如果我将一个新属性添加到外部Repeater并将其设置为与index相同的值，它将被设置一次并为每个重复的行保留第一个值(0).

Unfortunately I seem to have no access to the outer index.The first value is shown, the second value is represented by the String undefined in the TextArea of my GUI.In case I add a new property to the outer Repeater and set it the same value as index, it will be set once and keep the first value (0) for each repeated row.

是否不可能以某种方式动态达到此外部索引值?还是有人知道更好的方法来动态创建可单独访问的QML项目的二维数组?

Is it impossible to dynamically reach this outer index value somehow?Or does anyone know a better way to dynamically create two-dimensional arrays of items in QML which are individually accessable?

推荐答案

index属性是上下文属性.您可以将其存储到普通属性，因此可以从另一个上下文访问它:

The index property is a context property. You can store it to an ordinary property, so you can access it from another context:

Repeater {
    id: rows
    // ...
    Repeater {
        id: columns
        property int outerIndex: index
        // ...
        Text {
            text: index + "." + columns.outerIndex
        }
    }
}

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