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Thread: convert QVariant to QAction

  1. #1
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    Default convert QVariant to QAction

    I've set a pointer to a QAction as a QWidget property as following:
    Qt Code:
    1. myWidget->setProperty("action", actionPtr);
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    I send the QWidget to a function and I want to convert the property "action" to a QAction again so I can call one of it's methods, is that possible? if yes please tell me how

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    Default Re: convert QVariant to QAction

    Yes, but you should avoid such weird mechanisms. You can store the pointer as an integer and when you want it back, convert the variant to integer and cast it to the appropriate pointer type.

    But I'd like to suggest an alternative. Implement a singleton class (or a global object) that will act as an action manager. First you register actions there and then you can retrieve them back by calling them by name. Then you can store the action's name in QVariant and then ask the manager for a proper action. The simplest action manager is a global QMap<QString,QAction*> object but it's worth implementing something a bit more complex.
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  3. The following user says thank you to wysota for this useful post:

    sepehr (5th April 2009)

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    Default Re: convert QVariant to QAction

    Quote Originally Posted by wysota View Post
    Yes, but you should avoid such weird mechanisms. You can store the pointer as an integer and when you want it back, convert the variant to integer and cast it to the appropriate pointer type.
    would you give an example for this?
    ---
    A situtation never gets so complicated that it can't get any more complicated!

  5. #4
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    Default Re: convert QVariant to QAction

    Qt Code:
    1. QAction *act = ...
    2. QVariant var = (int)act;
    3. //...
    4. QAction *act2 = (QAction*)var.toInt();
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