|
1 // Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). |
|
2 // All rights reserved. |
|
3 // This component and the accompanying materials are made available |
|
4 // under the terms of "Eclipse Public License v1.0" |
|
5 // which accompanies this distribution, and is available |
|
6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
|
7 // |
|
8 // Initial Contributors: |
|
9 // Nokia Corporation - initial contribution. |
|
10 // |
|
11 // Contributors: |
|
12 // |
|
13 // Description: |
|
14 // |
|
15 |
|
16 /** |
|
17 @file |
|
18 @InternalComponent |
|
19 */ |
|
20 |
|
21 #include "cagpsdatabus.h" |
|
22 #include "lbsdevloggermacros.h" |
|
23 #include "mdatabusobserver.h" |
|
24 #include <lbs/lbsextendedsatellite.h> |
|
25 |
|
26 #ifdef _DEBUG |
|
27 _LIT(KLocDataBus, "CAgpsDataBus"); |
|
28 #endif |
|
29 |
|
30 /** |
|
31 Create a location data bus, this should be called from the location cache |
|
32 |
|
33 @return The pointer to the location data bus |
|
34 @see CLocationCache |
|
35 */ |
|
36 CAgpsDataBus* CAgpsDataBus::NewL(MDataBusObserver& aObserver, const TUid& aModuleId) |
|
37 { |
|
38 CAgpsDataBus* self = new (ELeave) CAgpsDataBus(aObserver, aModuleId); |
|
39 CleanupStack::PushL(self); |
|
40 self->ConstructL(); |
|
41 CleanupStack::Pop(self); |
|
42 return self; |
|
43 } |
|
44 |
|
45 /** |
|
46 constructor, note the location data bus is owned by location cache and used by CRequestQ, and it is a module-based CActive object. |
|
47 Set the data bus as standard priority by default. |
|
48 Add itself to Active Scheduler |
|
49 |
|
50 @param aModuleId Position module Id |
|
51 @see CRequestQ |
|
52 @see CLocationCache |
|
53 */ |
|
54 CAgpsDataBus::CAgpsDataBus(MDataBusObserver& aObserver, const TUid& aModuleId) : CActive(CActive::EPriorityStandard), iModuleId(aModuleId), iObs(aObserver) |
|
55 { |
|
56 CActiveScheduler::Add(this); |
|
57 } |
|
58 |
|
59 /** |
|
60 Open the RProperty object wrappered by the data bus. |
|
61 Location data bus is implemented as Publish & Subscribe mechanism. |
|
62 */ |
|
63 void CAgpsDataBus::ConstructL() |
|
64 { |
|
65 iAGPSDataBus.OpenL(iModuleId); |
|
66 } |
|
67 |
|
68 /** |
|
69 Cancel any outstanding request to the CActive object. |
|
70 Close the RProperty. |
|
71 */ |
|
72 CAgpsDataBus::~CAgpsDataBus() |
|
73 { |
|
74 Cancel(); |
|
75 iAGPSDataBus.Close(); |
|
76 } |
|
77 |
|
78 /** |
|
79 Subscribe to the data bus. It will be called by objects which listen to the data bus. |
|
80 It will eventually call RProperty::Subscribe() |
|
81 Set active the data bus active object |
|
82 Panic if there are no data bus observers already set. |
|
83 */ |
|
84 void CAgpsDataBus::Subscribe() |
|
85 { |
|
86 if(!IsActive()) |
|
87 { |
|
88 iAGPSDataBus.NotifyPositionUpdate(iStatus); |
|
89 SetActive(); |
|
90 } |
|
91 } |
|
92 |
|
93 /** |
|
94 Cancel the subscribe to the data bus. Cancel any outstanding request to the CActive object. |
|
95 Panic if there are no data bus observers already set. |
|
96 */ |
|
97 void CAgpsDataBus::UnSubscribe() |
|
98 { |
|
99 Cancel(); |
|
100 } |
|
101 |
|
102 /** |
|
103 Get the last position from the bus |
|
104 |
|
105 */ |
|
106 TInt CAgpsDataBus::GetLastPositionInfo(TPositionSatelliteInfo& aSatelliteInfo, TTime& aActualTime, TUint& aAttributes, TUint& aMode) |
|
107 { |
|
108 TBool conflictControl; |
|
109 TTime targetTime; |
|
110 |
|
111 TInt error = iAGPSDataBus.GetPositionInfo(conflictControl, &aSatelliteInfo, aSatelliteInfo.PositionClassSize(), targetTime, aActualTime, aAttributes, aMode); |
|
112 |
|
113 return error; |
|
114 } |
|
115 |
|
116 |
|
117 /** |
|
118 from CActive, the main event processing loop |
|
119 Whenever there is a new event, i.e. the position info data is published to the data bus, notify the data bus observer by LocationDataAvailableL() |
|
120 */ |
|
121 void CAgpsDataBus::RunL() |
|
122 { |
|
123 TTime actualTime; |
|
124 TPositionExtendedSatelliteInfo satelliteInfo; |
|
125 TUint attributes = 0; |
|
126 TUint mode = 0; |
|
127 |
|
128 TInt error = GetLastPositionInfo(satelliteInfo, actualTime, attributes, mode); |
|
129 |
|
130 iObs.DataUpdate(satelliteInfo, iStatus.Int(), error, actualTime, attributes, mode); |
|
131 |
|
132 } |
|
133 |
|
134 /** |
|
135 from CActive |
|
136 Cancels the request for position update notification |
|
137 It will eventually cancel an outstanding subscription request for this property handle. |
|
138 */ |
|
139 void CAgpsDataBus::DoCancel() |
|
140 { |
|
141 iAGPSDataBus.CancelNotifyPositionUpdate(); |
|
142 } |
|
143 |
|
144 /** |
|
145 from CActive |
|
146 Simply fwds any errors to the observers |
|
147 */ |
|
148 TInt CAgpsDataBus::RunError(TInt aError) |
|
149 { |
|
150 return iObs.DataError(aError, iStatus.Int()); |
|
151 } |