1 bacntf.h |
1 // Copyright (c) 1997-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.symbianfoundation.org/legal/licencesv10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 // Started by BLB, October 1996 |
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17 #if !defined(__BACNTF_H__) |
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18 #define __BACNTF_H__ |
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19 |
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20 #include <e32base.h> |
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21 |
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22 |
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23 class CEnvironmentChangeNotifier : public CActive |
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24 /** Environment change notifier. This is an active object and can be used to handle |
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25 environment change events. |
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26 @publishedAll |
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27 @released |
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28 */ |
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29 { |
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30 public: |
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31 IMPORT_C static CEnvironmentChangeNotifier* NewL(TInt aPriority,const TCallBack& aCallBack); |
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32 IMPORT_C ~CEnvironmentChangeNotifier(); |
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33 IMPORT_C void Start(); |
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34 IMPORT_C TInt Set(const TCallBack& aCallBack); |
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35 inline TInt Change() const; |
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36 private: |
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37 inline CEnvironmentChangeNotifier(TInt aPriority); |
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38 void RunL(); |
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39 void DoCancel(); |
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40 private: |
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41 TInt iChange; |
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42 TCallBack iCallBack; |
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43 RChangeNotifier iChangeNotifier; |
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44 }; |
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45 |
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46 |
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47 |
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48 inline TInt CEnvironmentChangeNotifier::Change() const |
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49 /** Returns the last set of change events. |
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50 |
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51 If the last outstanding request completed normally, the function returns a |
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52 bit pattern where each bit value corresponds to one of the enumerators defined |
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53 by TChanges. A set bit indicates that the corresponding change event occurred. |
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54 |
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55 For example, if the bit value TChanges::EChangesMidnightCrossover is set, |
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56 then the system time has passed midnight. |
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57 |
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58 @return A set of bits consisting of one or more of the values defined by TChanges, |
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59 or KErrCancel if the last outstanding request was cancelled. |
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60 @see TChanges */ |
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61 {return iChange;} |
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62 |
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63 #endif |