在QML中访问结构内部的结构 [英] Accessing Structure inside a structure in QML

问题描述

以前，我发布了一个有关如何在QML中访问结构的问题，并从一些很棒的人那里得到了完美的答案，现在我需要知道有什么方法可以访问中的结构内的结构. QML ，下面是代码:

Previously I posted a question on how to access structures in QML and got perfect answers from some awesome people and now i need to know is there any way to access structure inside a structure in QML, Following is the code :

//MyNewStruct

struct MyNewStruct {
 Q_GADGET
    float m_range;
    Q_PROPERTY(float range MEMBER m_range)
};

//MyStruct

struct MyStruct {
Q_GADGET
int m_val;
QString m_name1;
QString m_name2;
QString m_name3;
QString m_name4;

MyNewStruct m_newStr; //**new Struct declaration

Q_PROPERTY(int val MEMBER m_val)
Q_PROPERTY(QString name1 MEMBER m_name1)
Q_PROPERTY(QString name2 MEMBER m_name2)
Q_PROPERTY(QString name3 MEMBER m_name3)
Q_PROPERTY(QString name4 MEMBER m_name4)

Q_PROPERTY(MyNewStruct newStr MEMBER m_newStr) //**Currently getting error as != cannot be used
};

推荐答案

我在MOC中遇到的错误是由于运算符"！= "功能仍未定义.

The error which I was getting in MOC was due to operator "!=" functionality was still undefined.

由于我们在构建复杂应用程序/模块时需要这些类型的结构定义，因此我想到了在此处发布此问题的地方，并且也没有适当的文档.

Since these kinds of structure definitions are required when we are building a complex application/module that's where I thought of posting this question here and also there is no proper doc available.

出现问题:我在结构中使用了简单的运算符加载(因为这里允许使用方法)以下是代码:

Coming to the question: I used simple operator loading in my struct (since methods are allowed here ) Following is the code:

struct MyNewStruct {
 Q_GADGET
    float m_range;
    Q_PROPERTY(float range MEMBER m_range)

    //Overload operator !=
    bool operator!=(const MyNewStruct & val)
    {
         //Do check with local members and return true/false
    }
};

这样做可以访问QML中的MyNewStruct.希望对其他人有帮助.

By doing this I was able to access MyNewStruct in QML.Hope it helps others.

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