How to create the application class

The application class defines the properties of the application, such as its UID and caption, and creates a new document. To create an application class, derive from CQikApplication and overload its two pure virtual functions:

• CQikApplication::AppDllUid()

  This function is called by the application architecture as a final check of the identity of the application. Implementations of the function must simply return the application's UID.

• CQikApplication::CreateDocumentL()

  This function is called by the application architecture to create the document object associated with this application. Implementations of the function must return a pointer to the application's CQikDocument derived class as a pointer to a CApaDocument.

The definition of a minimal application class and the implementation of its functions are given in the example below.

class CExampleApplication : public CQikApplication
     {
     private:
     
     //CreateDocumentL calls for NewL in CExampleDocument
     CApaDocument* CreateDocumentL();

     //Returns the UID of the application.
     TUid AppDllUid() const;        
     };

// 1. Gets the application UID
TUid CExampleApplication::AppDllUid() const
    {
    return KUidApp; // The same UID as is declared in the mmp file.
    }

// 2. Gets a new document object.
CApaDocument* CExampleApplication::CreateDocumentL()
    {
    return new (ELeave) CExampleDocument(*this);
    }