plugin accessing data from qApp

[itpenguin]

Plugins are normally made for accessing plugin methods in the main program.

Now I have an application, where the plugin needs to call a method from the main program.
How is this done?
I have a working solution using QMetaObject::invoke(),, but using this is rather complex.

Is there an easier way to call an application method from within the plugin?

[anda_skoa]

You can always specify a host API and give an object implementing that API to the plugin object.

E.g.

class HostApi
{
public:
    virtual void doSomething() = 0;
};

class HostApi
{
public:
    virtual void doSomething() = 0;
};

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The plugin API would then simply need something like

class Plugin
{
public:
    virtual void setHost(HostApi *host) = 0;
};

class Plugin
{
public:
    virtual void setHost(HostApi *host) = 0;
};

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The host application can implement the API in any object it likes, it could even hand each plugin a different instance of the implementation or even different implementations.

Cheers,
_

[itpenguin]

OK, my mistake was the declaration of doSomething(). It must be virtual, because the address of the method is allocated dynamically at run time.