--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/taskswitcher/taskswitcherui/taskswitcherapp/inc/tsdevicestate.h	Tue Jan 26 11:48:23 2010 +0200
@@ -0,0 +1,227 @@
+/*
+* Copyright (c) 2008 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:  Device state (touch mode, screen orientation) handler
+ *
+*/
+
+
+#ifndef TSDEVICESTATE_H_
+#define TSDEVICESTATE_H_
+
+#include <e32base.h>
+#include "tsappui.h"
+#include "tsproplistener.h"
+
+/**
+ * Interface for getting notifications about screen orientation
+ * and/or touch state etc. changes.
+ */
+class MTsDeviceStateObserver
+    {
+public:
+    /**
+     * Type of change.
+     */
+    enum TChangeType
+        {
+        // screen orientation (portrait <=> landscape) has changed
+        EOrientation = 0x01,
+        // touch enabled/disabled status has changed
+        ETouchState = 0x02,
+        // skin has changed
+        ESkin = 0x04,
+        // input device mode change
+        EDeviceType = 0x08,
+        // all of the above
+        EAny = 0xFF
+        };
+
+    /**
+     * Called when a change, to which the observer is registered,
+     * has happened.
+     */
+    virtual void HandleDeviceStateChanged( TChangeType aChangeType ) = 0;
+    };
+
+/**
+ * Class for keeping track of screen orientation and touch enabled/disabled changes.
+ */
+class CTsDeviceState :
+    public CBase,
+    public MTsPropertyChangeObserver
+    {
+public:
+    /**
+     * Enumeration for TouchState().
+     */
+    enum TTouchState
+        {
+        ETouchEnabled,
+        ETouchDisabled
+        };
+
+    /**
+     * Enumeration for Orientation().
+     */
+    enum TOrientation
+        {
+        EPortrait,
+        ELandscape
+        };
+
+    /**
+     * Enumeration for DeviceType().
+     */
+    enum TDeviceType
+        {
+        EHybrid = 0,
+        EFullTouch  = 1
+        };
+
+    /**
+     * Creates a new instance.
+     */
+    static CTsDeviceState* NewL();
+
+    /**
+     * Destructor.
+     */
+    ~CTsDeviceState();
+
+    /**
+     * Returns the current state of touch awareness.
+     */
+    TTouchState TouchState() const;
+
+    /**
+     * Returns the current screen orientation.
+     */
+    TOrientation Orientation() const;
+
+    /**
+     * Returns the current device input type.
+     */
+    TDeviceType DeviceType() const;
+
+    /**
+     * Registers an observer.
+     * @param   aObserver   ref to observer
+     * (same observer can be added several times with different mask if needed)
+     * @param   aMask       bitmask composed from TChangeType values
+     * (when to notify the observer)
+     */
+    void AddObserverL( MTsDeviceStateObserver& aObserver, TInt aMask );
+
+    /**
+     * Deregisters the given observer.
+     * @param   aObserver   ref to observer
+     */
+    void RemoveObserver( MTsDeviceStateObserver& aObserver );
+
+    /**
+     * Called from appui.
+     */
+    void HandleResourceChange( TInt aType );
+    
+    //From MTsPropertyChangeObserver
+public:
+    /**
+     * Observer interface for getting notifications about a P&S property change.
+     */
+	virtual void PropertyChanged( TUid aCategory, TUint aKey );
+private:
+    /**
+     * Constructor.
+     */
+    CTsDeviceState();
+    
+    /**
+     * Performs 2nd phase construction.
+     */
+    void ConstructL();
+
+    /**
+     * Checks if touch is enabled or not and performs
+     * appropriate actions.
+     */
+    void CheckTouchState();
+
+    /**
+     * Checks the screen orientation and performs
+     * appropriate actions.
+     */
+    void CheckOrientation();
+    
+    /**
+     * Checks the device input type.
+     */
+    void CheckDeviceType();
+    
+    /**
+     * Notifies all observers that are registered for the given type.
+     */
+    void NotifyObservers( MTsDeviceStateObserver::TChangeType aType );
+
+    class SObserver;
+
+    /**
+     * Identity function to perform comparison between observer array items.
+     */
+    static TBool ObserverIdentity( const SObserver& aA, const SObserver& aB );
+
+private:
+    /**
+     * Current touch enabled/disabled state.
+     */
+    TTouchState iTouchState;
+    
+    /**
+     * Current screen orientation.
+     */
+    TOrientation iOrientation;
+    
+    /**
+     * Current the device input type.
+     */
+    TDeviceType iDeviceType;
+    
+    /**
+     * Observer array entry struct.
+     */
+    struct SObserver
+        {
+        TInt iMask;
+        MTsDeviceStateObserver* iObserver; // not owned
+        SObserver( TInt aMask, MTsDeviceStateObserver* aObserver )
+            : iMask( aMask ), iObserver( aObserver ) { }
+        };
+        
+    /**
+     * Observer array.
+     */
+    RArray<SObserver> iObservers;
+
+    /**
+     * Counter to indicate that we have not yet returned
+     * from a previous HandleResourceChange.
+     */
+    TInt iResChangeActiveCount;
+    
+    /**
+     * Flip status change observer.
+     */
+    CTsPropertyListener* iFlipStatusObserver;
+    };
+
+#endif // TSDEVICESTATE_H_