foreground.cpp

手机待机浮动窗口

#include "foreground.h"
002 #include "symbian_auto_ptr.h"
003 #include <e32std.h>
004 #include <apgwgnam.h>
005 
006 
007 class CForegroundImpl : public CForeground {
008         virtual void AddObserver(MForegroundObserver* aObserver);
009 
010         CForegroundImpl(RWsSession& aWsSession);
011 
012         void ConstructL();
013         void RunL();
014         TInt RunError(TInt aError);
015         void DoCancel();
016         void StartL();
017         void Release();
018         void Listen();
019 
020         RPointerArray<MForegroundObserver> iObservers;
021         RWsSession&     iWsSession;
022         RWindowGroup    iWg; bool iWg_is_open;
023         
024         friend class CForeground;
025 public:
026         virtual ~CForegroundImpl();
027 };
028 
029 CForeground::CForeground(CActive::TPriority aPriority) : CActive(aPriority)
030 {
031 }
032 
033 CForeground::~CForeground()
034 {
035         
036 }
037 
038 CForeground* CForeground::NewL(RWsSession& aWsSession)
039 {
040         auto_ptr<CForegroundImpl> ret(new (ELeave) CForegroundImpl(aWsSession));
041         ret->ConstructL();
042         return ret.release();
043 }
044 
045 void CForegroundImpl::AddObserver(MForegroundObserver* aObserver)
046 {
047         User::LeaveIfError(iObservers.Append(aObserver));
048 }
049 
050 CForegroundImpl::CForegroundImpl(RWsSession& aWsSession) : CForeground(EPriorityHigh), iWsSession(aWsSession), iWg(aWsSession)
051 {
052 }
053 
054 CForegroundImpl::~CForegroundImpl()
055 {
056         Release();
057 
058         iObservers.Close();
059 }
060 
061 void CForegroundImpl::ConstructL()
062 {
063         CActiveScheduler::Add(this);
064 
065         StartL();
066 }
067 
068 void CForegroundImpl::RunL()
069 {
070         if (iStatus == KErrNone) {
071                 TWsEvent e;
072                 iWsSession.GetEvent(e);
073         }
074 
075         TInt wgid=iWsSession.GetFocusWindowGroup();
076         
077         CApaWindowGroupName* gn;
078         gn=CApaWindowGroupName::NewLC(iWsSession, wgid);
079 
080         int i;
081         for (i=0; i<iObservers.Count(); i++) {
082                 iObservers[i]->ForegroundChanged(gn->AppUid());
083         }
084         CleanupStack::PopAndDestroy(); // gn
085 
086         Listen();
087 }
088 
089 TInt CForegroundImpl::RunError(TInt /*aError*/)
090 {
091         TRAPD(err, StartL());
092         return err;
093 }
094 
095 void CForegroundImpl::DoCancel()
096 {
097         iWsSession.EventReadyCancel();
098 }
099 
100 void CForegroundImpl::StartL()
101 {
102         Release();
103         User::LeaveIfError(iWg.Construct((TUint32)&iWg, EFalse));
104         iWg.SetOrdinalPosition(-1);
105         iWg.EnableReceiptOfFocus(EFalse);
106 
107         CApaWindowGroupName* wn=CApaWindowGroupName::NewLC(iWsSession);
108         wn->SetHidden(ETrue);
109         wn->SetWindowGroupName(iWg);
110         CleanupStack::PopAndDestroy();
111 
112         User::LeaveIfError(iWg.EnableFocusChangeEvents());
113 
114         Listen();
115 }
116 
117 void CForegroundImpl::Listen()
118 {
119         iStatus=KRequestPending;
120         iWsSession.EventReady(&iStatus);
121         SetActive();
122 }
123 
124 void CForegroundImpl::Release()
125 {
126         Cancel();
127         if (iWg_is_open) {
128                 iWg.Close();
129                 iWg_is_open=false;
130         }
131 }