将自定义对象从 QtScript 传递到 C++ 时出错

发布于 2024-09-24 00:48:21 字数 1234 浏览 5 评论 0原文

我编写了一个自定义类，可以通过原型在 QtScript 中使用。另外还有另一个全局类可用，它应该用于打印 QtScript 中生成的自定义类。

这是我的自定义类（非常简单；））：

class Message  
{  
public:  
  int source;  
  int target;  
};

这是我正在使用的原型：

class MessagePrototype : public QObject, public QScriptable
{
  Q_OBJECT
  Q_PROPERTY(int source READ getSource WRITE setSource)
  Q_PROPERTY(int target READ getTarget WRITE setTarget)
public:
  void setSource(const int source);
  int getSource() const;
  void setTarget(const int target);
  int getTarget() const;
};

setter / getter 仅通过 qscriptvalue_cast(QScriptable::thisObject()); 更改/打印相应的 Message 对象；

现在我的脚本看起来像这样：

var test = new Message;
test.source = 5;
print(test.source);
GlobalObject.sendMessage(test);

所以，脚本编译正常， print() 命令执行它应该做的事情，它打印 5。但问题是我的 GlobalObject 的 sendMessage 函数：

void MessageAnalysis::sendMessage(Message msg)
{
  qDebug() << "[Message]" << msg.source << msg.target;
}

这段代码总是打印：“[Message] 0 0”。

MessageAnalysis 被注册为 QtScript 的“GlobalObject”。此外，我还注册了 Message 和 Message* 作为元类型以及构造函数、原型和其他所有内容。这似乎有效。

有谁知道为什么 QtScript 中的值已更改但无法从我的 C++ 函数访问？或者我做错了什么？

原文

I have written a custom class which is available in QtScript through a Prototype. Also another global class is available which should be used to print the custom class generated in QtScript.

This is my custom class (very simple ;) ):

class Message  
{  
public:  
  int source;  
  int target;  
};

This is the prototype I am using:

class MessagePrototype : public QObject, public QScriptable
{
  Q_OBJECT
  Q_PROPERTY(int source READ getSource WRITE setSource)
  Q_PROPERTY(int target READ getTarget WRITE setTarget)
public:
  void setSource(const int source);
  int getSource() const;
  void setTarget(const int target);
  int getTarget() const;
};

The setter / getter are only changing / printing the corresponding Message object through a qscriptvalue_cast(QScriptable::thisObject());

Now my script looks like this:

var test = new Message;
test.source = 5;
print(test.source);
GlobalObject.sendMessage(test);

So, the script compiles fine and the print() command does what it should, it prints 5. But the problem is the sendMessage function of my GlobalObject:

void MessageAnalysis::sendMessage(Message msg)
{
  qDebug() << "[Message]" << msg.source << msg.target;
}

This piece of code always prints: "[Message] 0 0".

MessageAnalysis is registered as "GlobalObject" for QtScript. Also I have registered Message and Message* as Metatypes and the constructor, prototype and everything else. This seems to work.

Does anyone knows why the values have been changed in QtScript but are not accessible from my C++ function? Or what I am doing wrong?

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