emailuis/emailui/inc/FreestyleEmailUiPropertySubscriber.h
changeset 0 8466d47a6819
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/emailuis/emailui/inc/FreestyleEmailUiPropertySubscriber.h	Thu Dec 17 08:39:21 2009 +0200
@@ -0,0 +1,113 @@
+/*
+ * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 
+ * All rights reserved.
+ * This component and the accompanying materials are made available
+ * under the terms of "Eclipse Public License v1.0"
+ * which accompanies this distribution, and is available
+ * at the URL "http://www.eclipse.org/legal/epl-v10.html".
+ *
+ * Initial Contributors:
+ * Nokia Corporation - initial contribution.
+ *
+ * Contributors:
+ *
+ * Description: Used for observing property changes and notifying listeners.
+ *
+ */
+
+#ifndef __FREESTYLEEMAILUIPROPERTYSUBSCRIBER_H__
+#define __FREESTYLEEMAILUIPROPERTYSUBSCRIBER_H__
+
+#include <e32base.h> // For CActive, link against: euser.lib
+#include <e32property.h> // Observer for property change events.
+
+/**
+ * Observer interface for property changes.
+ */
+class MFreestyleEmailUiPropertyChangedObserver
+    {
+public:
+
+	virtual void PropertyChangedL( TInt aValue ) = 0;
+    };
+
+
+/**
+ *  Subcribes property from P&S and listens to property changes.
+ */
+NONSHARABLE_CLASS( CFreestyleEmailUiPropertySubscriber ) : public CActive
+    {
+public: // Construction and destruction.
+
+    /**
+     * Two-phased constructor.
+     * @param aUid P&S property category.
+     * @param aKey P&S property key.
+     * @param aObserver The given property changed observer.
+     */
+    static CFreestyleEmailUiPropertySubscriber* NewL(
+    	const TUid aUid, 
+		const TUint32 aKey,
+		MFreestyleEmailUiPropertyChangedObserver& aObserver );
+
+    /**
+     * Two-phased constructor.
+     * @param aUid P&S property category.
+     * @param aKey P&S property key.
+     * @param aObserver The given property changed observer.
+     */
+    static CFreestyleEmailUiPropertySubscriber* NewLC(
+    	const TUid aUid, 
+        const TUint32 aKey,
+        MFreestyleEmailUiPropertyChangedObserver& aObserver );
+
+    /**
+     * Cancels and destroys the instance.
+     */
+    ~CFreestyleEmailUiPropertySubscriber();
+
+
+private: // Construction.
+
+    /**
+     * C++ constructor.
+     * @param aObserver The given property changed observer.
+     */
+	CFreestyleEmailUiPropertySubscriber(
+		MFreestyleEmailUiPropertyChangedObserver& aObserver );
+
+    /**
+     * Second phase constructor.
+     * @param aUid P&S property category.
+     * @param aKey P&S property key.
+     */
+    void ConstructL( const TUid aUid, const TUint32 aKey );
+
+
+private: // From CActive.
+
+    /**
+     * Handles completion.
+     */
+    void RunL();
+
+    /**
+     * How to cancel me.
+     */
+    void DoCancel();
+
+    
+private:
+
+    // The observer for property changes.
+	MFreestyleEmailUiPropertyChangedObserver& iPropertyChangeObserver;
+
+    // The property to listen to.
+    RProperty iProperty;
+    };
+
+
+#endif /* __FREESTYLEEMAILUIPROPERTYSUBSCRIBER_H__ */
+
+// End of file.
+