author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 02 Feb 2010 00:53:00 +0200 | |
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permissions | -rw-r--r-- |
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// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies). |
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// All rights reserved. |
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// This component and the accompanying materials are made available |
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// under the terms of "Eclipse Public License v1.0" |
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// which accompanies this distribution, and is available |
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// at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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// |
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// Initial Contributors: |
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// Nokia Corporation - initial contribution. |
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// |
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// Contributors: |
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// |
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// Description: |
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// CUserActivityManager class |
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// |
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// |
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#include "activitymanager.h" |
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#include "activitymanagerdebug.h" |
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/** |
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Factory function used to allocate and construct a new CUserActivityManager |
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object. |
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@param aPriority Priority for the CTimer active object. |
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@leave KErrNoMemory When memory allocations fail |
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@leave ... Any other one of the other system wide error codes |
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@return CUserActivityManager* Pointer to a new User Activity Manager object |
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*/ |
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EXPORT_C CUserActivityManager* CUserActivityManager::NewL(TInt aPriority) |
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{ |
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CUserActivityManager* self = new (ELeave) CUserActivityManager(aPriority); |
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CleanupStack::PushL(self); |
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self->ConstructL(); |
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CActiveScheduler::Add(self); |
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CleanupStack::Pop(self); |
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return self; |
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} |
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/** |
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Default constructor. |
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@param aPriority Priority for the CTimer. |
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@internalComponent |
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*/ |
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CUserActivityManager::CUserActivityManager(TInt aPriority) |
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: CTimer(aPriority), iInactiveCallback(0,0), iActiveCallback(0,0), iState(EStNotActive) |
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{ |
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} |
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/** |
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Destructor. |
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*/ |
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EXPORT_C CUserActivityManager::~CUserActivityManager() |
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{ |
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} |
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/** |
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Starts the user activity monitoring using the callbacks supplied with the |
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specify inactivity interval in seconds. If aInterval is not positive then |
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in release builds it assumes an interval of 1 second but in debug builds it |
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will panic. The function pointers in the callback arguments may be NULL if the |
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client is not interested in one or other events. |
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When called following construction or while inactivity is being monitored the |
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manager will enter/stay in inactivity monitoring mode when aInterval is larger |
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than the current elapsed inactivity time at the time of the call and |
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aInactiveCallback will be called first. Otherwise it will invoke |
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aInactiveCallback immediately and enter activity monitoring mode and |
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aActiveCallback will be called next. |
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When called while user activity is being monitored the manager will stay in |
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activity monitoring mode and aActiveCallback will be called first. |
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@param aInterval Inactivity interval in seconds. |
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@param aInactiveCallback This callback is used when there has not been user |
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activity for aInterval seconds. |
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@param aActiveCallback This callback is used when user activity is detected |
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after an inactivity period longer or equal to aInterval seconds. |
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@panic "CUserActivityManager" KErrNotSupported raised when when aInterval is |
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not positive in DEBUG builds |
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@see CTimer::Inactivity() |
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@see RTimer::Inactivity() |
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*/ |
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EXPORT_C void CUserActivityManager::Start(TTimeIntervalSeconds aInterval, |
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TCallBack aInactiveCallback, TCallBack aActiveCallback) |
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{ |
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iInterval = aInterval; |
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iInactiveCallback = aInactiveCallback; |
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iActiveCallback = aActiveCallback; |
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if (iInterval.Int() <= 0) |
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{ |
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// Panic if interval is not greater than zero. |
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__ACTIVITYMANAGER_TRACE1("Activity Mgr: Negative or zero interval supplied to Start(): %d", iInterval.Int()); |
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__ASSERT_DEBUG(EFalse, UAM_PANIC(KErrNotSupported)); |
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// In release mode interval will be set to one second |
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iInterval = TTimeIntervalSeconds(1); |
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} |
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// Cancel outstanding timer, if any |
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102 |
CTimer::Cancel(); |
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103 |
|
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if (iState == EStNotActive || iState == EStMonForInactivity) |
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105 |
{ |
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// Begin or contine monitoring for user inactivity |
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MonitorInactivity(); |
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} |
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109 |
else |
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110 |
{ |
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// Continue monitoring for user activity |
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__ACTIVITYMANAGER_TRACE1("Activity Mgr: Starting activity monitoring. Inactive for %d", User::InactivityTime().Int()); |
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Inactivity(0); |
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} |
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} |
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116 |
|
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/** |
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Re-starts activity monitoring with a new inactivity interval. See Start() for |
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behavioural description. |
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120 |
|
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Requires Start() to have been called previously otherwise the method will |
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panic in debug builds if Start() has not be called before hand to |
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set up at least one callback. This prevents wasting CPU cycles/power on |
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monitoring when no action will take place. |
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125 |
|
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@see CUserActivityManager::Start() |
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@param aInterval New inactivity interval in seconds. |
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@panic "CUserActivityManager" KErrNotSupported Raised when aInterval is |
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not positive in debug builds |
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@panic "CUserActivityManager" KErrNotReady Raised when Start() has not yet |
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been called in debug builds. |
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*/ |
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EXPORT_C void CUserActivityManager::SetInactivityTimeout(TTimeIntervalSeconds aInterval) |
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134 |
{ |
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if (iState <= EStNotActive) |
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136 |
{ |
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__ACTIVITYMANAGER_TRACE("Activity Mgr: SetInactivityTimeout() called before Start()"); |
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__ASSERT_DEBUG(EFalse, UAM_PANIC(KErrNotReady)); |
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} |
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140 |
|
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__ACTIVITYMANAGER_TRACE1("Activity Mgr: SetInactivityTimeout: %d", aInterval.Int()); |
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Start(aInterval, iInactiveCallback, iActiveCallback); |
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} |
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144 |
|
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/** |
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146 |
This method attempts to enter inactivity monitoring mode. For this to occur the |
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current ellapsed inactivity must be less than the iInterval otherwise it will |
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invoke the inactivity callback and enter activity monitoring mode. |
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149 |
|
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@see CTimer::Inactivity() |
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@see RTimer::Inactivity() |
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@internalComponent |
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*/ |
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void CUserActivityManager::MonitorInactivity() |
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155 |
{ |
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if (User::InactivityTime() >= iInterval) |
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157 |
{ |
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// Already inactive enough, monitor for activity |
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iState = EStMonForActivity; |
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// Monitor for activity, set timer before callback to avoid missing any |
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// user activity should callback take some time. |
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Inactivity(0); |
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// Inform client that the inactivity interval has ended. |
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(void) iInactiveCallback.CallBack(); |
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__ACTIVITYMANAGER_TRACE1("Activity Mgr::MonitorInactivity - Starting activity monitoring. Inactive for %d", User::InactivityTime().Int()); |
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166 |
} |
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167 |
else |
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168 |
{ |
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// Monitor for Inactivity |
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iState = EStMonForInactivity; |
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Inactivity(iInterval); |
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__ACTIVITYMANAGER_TRACE1("Activity Mgr::MonitorInactivity - Starting inactivity monitoring. Inactive for %d", User::InactivityTime().Int()); |
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} |
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174 |
} |
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175 |
|
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/** |
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177 |
This is called from CActiveScheduler when the timer registered using the |
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CTimer::Inactivity() call expires. This could indicate user inactivity or |
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activity, iStatus is checked to determine which condition has been detected |
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by CTimer. |
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181 |
|
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If the manager is in inactivity monitoring mode the iInactiveCallback will be |
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invoked and the manager will switch to monitoring for activity. |
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184 |
If the manager is in activity monitoring mode the iActiveCallback will be |
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invoked and the manager will attempt to switch to monitoring for inactivity. |
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186 |
This attempt may fail and it will remain in activity monitoring mode if an |
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iInterval amount of inactivity has passed since RunL() was invoked. |
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188 |
|
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189 |
When CActive::iStatus indicates and error a panic is raised in debug builds. In |
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190 |
release builds it returns to the active scheduler to handle. |
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191 |
|
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192 |
@see CUserActivityManager::MonitorInactivity() |
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@see CTimer::Inactivity() |
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@see RTimer::Inactivity() |
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@internalComponent |
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*/ |
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197 |
void CUserActivityManager::RunL() |
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198 |
{ |
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199 |
if (iStatus == KErrNone) |
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200 |
{ |
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201 |
if (iState == EStMonForInactivity) |
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202 |
{ |
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// Looking for Inactivity, found it |
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__ACTIVITYMANAGER_TRACE("Activity Mgr: User inactivity detected"); |
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// Monitor for activity, set timer before callback to avoid missing |
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// any user activity should callback take some time. |
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iState = EStMonForActivity; |
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Inactivity(0); |
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// Inform client that the inactivity interval has ended. |
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(void) iInactiveCallback.CallBack(); |
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} |
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else if (iState == EStMonForActivity) |
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{ |
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// Looking for activity, found it |
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__ACTIVITYMANAGER_TRACE("Activity Mgr: User activity detected"); |
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(void) iActiveCallback.CallBack(); |
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// Monitor for activity unless MonitorInactivity overrides it |
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iState = EStMonForInactivity; |
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MonitorInactivity(); |
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} |
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else |
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{ // Must never happen, indicates internal state of object incorrect. |
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__ASSERT_ALWAYS(EFalse, UAM_PANIC(KErrGeneral)); |
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} |
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} |
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else |
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227 |
{ |
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// KErrCancel, KErrArgument, KErrOverflow,... |
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__ACTIVITYMANAGER_TRACE1("Activity Mgr: RunL error: %d",iStatus.Int()); |
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// Irrecoverable error, no way to notify client of failure (callbacks |
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// have no parameters to pass back error codes). |
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__ASSERT_ALWAYS(EFalse, UAM_PANIC(iStatus.Int())); |
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} |
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} |