author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Wed, 09 Jun 2010 11:06:44 +0300 | |
branch | RCL_3 |
changeset 97 | 0e9202c0340c |
parent 33 | 25f95128741d |
permissions | -rw-r--r-- |
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// Copyright (c) 1996-2009 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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// |
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// Window server redraw queue handling |
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// |
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#include <e32std.h> |
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#include "server.h" |
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#include "rootwin.h" |
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#include "windowgroup.h" |
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#include "walkwindowtree.h" |
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#include "EVQUEUE.H" |
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#include "panics.h" |
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#include "wstop.h" |
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const TInt KGranularity = 10; |
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void TWsRedrawEvent::SetHandle(TUint aHandle) |
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{ |
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iHandle=aHandle; |
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} |
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void TWsRedrawEvent::SetRect(TRect aRect) |
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{ |
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iRect=aRect; |
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} |
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TWsRedrawEvent CRedrawQueue::iNullRedrawEvent; |
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CRedrawQueue::CRedrawQueue(CWsClient *aOwner) : CEventBase(aOwner) |
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{ |
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__DECLARE_NAME(_S("CRedrawQueue")); |
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} |
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void CRedrawQueue::ConstructL() |
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{ |
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iRedrawTrigger=EFalse; |
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iRedraws=new(ELeave) CArrayFixSeg<TRedraw>(KGranularity); |
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iKeyPriority=new(ELeave) TKeyArrayFix(_FOFF(TRedraw,iPriority),ECmpTUint32); |
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iKeyWindow=new(ELeave) TKeyArrayFix(_FOFF(TRedraw,iRedraw),ECmpTUint32); |
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Mem::FillZ(&iNullRedrawEvent,sizeof(iNullRedrawEvent)); |
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} |
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CRedrawQueue::~CRedrawQueue() |
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{ |
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delete iRedraws; |
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delete iKeyPriority; |
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delete iKeyWindow; |
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} |
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void CRedrawQueue::ReCalcOrder() |
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{ |
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const TInt redrawsCount=iRedraws->Count(); |
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for(TInt index=0;index<redrawsCount;index++) |
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{ |
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TRedraw *redraw=&iRedraws->At(index); |
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redraw->iPriority=static_cast<CWsClientWindow*>(redraw->iRedraw->WsWin())->RedrawPriority(); |
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} |
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iRedraws->Sort(*iKeyPriority); |
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} |
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void CRedrawQueue::AddInvalid(CWsWindowRedraw *aRedrawWin) |
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// |
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// Add a window to the update list. |
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// |
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{ |
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TInt index; |
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TRedraw redraw; |
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redraw.iRedraw=aRedrawWin; |
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if (iRedraws->Find(redraw,*iKeyWindow,index)!=0) |
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{ |
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redraw.iPriority=static_cast<CWsClientWindow*>(aRedrawWin->WsWin())->RedrawPriority(); |
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TRAPD(err,iRedraws->InsertIsqAllowDuplicatesL(redraw,*iKeyPriority)); |
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if (err!=KErrNone) |
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{ |
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WS_ASSERT_DEBUG(err==KErrNoMemory,EWsPanicRedrawQueueError); |
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iAllocError=ETrue; |
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} |
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iRedrawTrigger=ETrue; |
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} |
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} |
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void CRedrawQueue::DeleteFromQueue(TInt aIndex) |
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{ |
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iRedraws->Delete(aIndex,1); |
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//We are certain we will need iRedraws again, so it would be silly to compress away the last KGranularity slots. |
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const TInt count = iRedraws->Count(); |
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if((count >= KGranularity) && (count % KGranularity == 0)) |
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{ |
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103 |
iRedraws->Compress(); |
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} |
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105 |
} |
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106 |
|
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107 |
void CRedrawQueue::RemoveInvalid(CWsWindowRedraw *aRedrawWin) |
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108 |
// |
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// remove the window from the invalid window list. |
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// harmless to call if the window is not in the list. |
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111 |
// |
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112 |
{ |
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TInt index; |
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TRedraw redraw; |
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115 |
|
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redraw.iRedraw=aRedrawWin; |
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redraw.iPriority=0; |
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if ((iRedraws->Find(redraw,*iKeyWindow,index))==KErrNone) |
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DeleteFromQueue(index); |
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120 |
} |
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121 |
|
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TBool CRedrawQueue::TriggerRedraw() |
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123 |
// |
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// Trigger any pending redraw messages in the queue |
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// Returns ETrue if a redraw was sent, EFalse if not. |
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126 |
// |
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127 |
{ |
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128 |
TBool ret=EFalse; |
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if (iRedrawTrigger) |
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130 |
{ |
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iRedrawTrigger=EFalse; |
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if (!iEventMsg.IsNull() && (iRedraws->Count()>0 || iAllocError)) |
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133 |
{ |
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SignalEvent(); |
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ret=ETrue; |
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136 |
} |
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137 |
} |
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return(ret); |
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139 |
} |
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140 |
|
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141 |
void CRedrawQueue::EventReady(const RMessagePtr2& aEventMsg) |
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142 |
// |
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// Queue a read of an event from the queue |
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144 |
// |
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145 |
{ |
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146 |
CEventBase::EventReady(aEventMsg); |
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iRedrawTrigger=ETrue; |
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TriggerRedraw(); |
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149 |
} |
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150 |
|
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151 |
TBool CRedrawQueue::FindOutstandingRedrawEvent(CWsWindowRedraw& aRedraw, TWsRedrawEvent& aEvent) |
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152 |
{ |
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153 |
TRect rect; |
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if (aRedraw.GetRedrawRect(rect)) |
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155 |
{ |
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aEvent.SetRect(rect); |
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aEvent.SetHandle(aRedraw.WsWin()->ClientHandle()); |
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CEventBase::GetData(&aEvent,sizeof(aEvent)); |
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159 |
return ETrue; |
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160 |
} |
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161 |
return EFalse; |
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162 |
} |
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163 |
|
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164 |
TBool CRedrawQueue::FindWindowNeedingRedrawEvent(TWsRedrawEvent& aEvent) |
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165 |
{ |
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166 |
#if defined(_DEBUG) |
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CWsWindowRedraw* previousRedraw = NULL; |
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168 |
#endif |
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// search all screens |
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TInt invalidWindows = 0; |
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for (TInt screenNo = 0; screenNo < CWsTop::NumberOfScreens(); ++screenNo) |
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172 |
{ |
33
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const CScreen* screen = CWsTop::Screen(screenNo); |
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WS_ASSERT_ALWAYS(screen, EWsPanicNoScreen); |
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CWsRootWindow* rootWindow = screen->RootWindow(); |
0
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for (CWsWindowGroup *groupWin = rootWindow->Child(); groupWin; groupWin = groupWin->NextSibling()) |
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177 |
{ |
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if (groupWin->WsOwner() == iWsOwner) |
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179 |
{ |
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CWsWindowRedraw* redrawWin = NULL; |
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// use a window tree walk that can be resumed to find windows with an invalid region |
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TResumableWalkWindowTreeFindInvalid wwt(&redrawWin); |
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groupWin->WalkWindowTree(wwt, EWalkChildren, EFalse); |
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184 |
while (redrawWin != NULL) |
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185 |
{ |
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WS_ASSERT_DEBUG(redrawWin != previousRedraw, EWsPanicRedrawQueueError); |
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// (the window may not actually need the client to redraw it, e.g. a CWsBlankWindow can redraw itself) |
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188 |
if (FindOutstandingRedrawEvent(*redrawWin, aEvent)) |
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189 |
{ |
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return ETrue; |
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191 |
} |
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192 |
else |
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193 |
{ // continue the Tree Walk |
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194 |
#if defined(_DEBUG) |
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previousRedraw = redrawWin; |
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196 |
#endif |
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197 |
if (redrawWin->NeedsRedraw()) |
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198 |
{ // needs to be redrawn later? |
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199 |
++invalidWindows; |
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200 |
} |
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201 |
redrawWin = NULL; |
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groupWin->WalkWindowTree(wwt, EWalkChildren, ETrue); |
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203 |
} |
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204 |
} |
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205 |
} |
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206 |
} |
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} |
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if (invalidWindows == 0) |
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{ // error recovery is complete |
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iAllocError = 0; |
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} |
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return EFalse; |
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} |
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|
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void CRedrawQueue::GetData() |
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// |
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// If there is an outstanding redraw event in the queue, reply with it's data |
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// |
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{ |
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CWsWindowRedraw *redraw; |
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TWsRedrawEvent event; |
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|
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while (iRedraws->Count()>0) |
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{ |
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redraw=(*iRedraws)[0].iRedraw; |
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if (FindOutstandingRedrawEvent(*redraw,event)) |
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{ |
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return; |
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} |
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TInt toDelete=0; |
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if (redraw!=(*iRedraws)[0].iRedraw) |
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{ //In low memory conditions calls to FindOutstandingRedrawEvent can cause extra entries to be added to the array |
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TRedraw redrawFind; |
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redrawFind.iRedraw=redraw; |
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iRedraws->Find(redrawFind,*iKeyWindow,toDelete); |
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} |
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DeleteFromQueue(toDelete); |
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} |
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|
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if (iAllocError && FindWindowNeedingRedrawEvent(event)) |
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{ |
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return; |
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} |
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|
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CEventBase::GetData(&iNullRedrawEvent,sizeof(iNullRedrawEvent)); |
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} |
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|
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TUint CRedrawQueue::RedrawPriority(CWsWindowRedraw *aRedrawWin) |
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{ |
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TInt index; |
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TRedraw redraw; |
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TUint priority=0; |
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redraw.iRedraw=aRedrawWin; |
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|
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if ((iRedraws->Find(redraw,*iKeyWindow,index))==KErrNone) |
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{ |
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priority=iRedraws->At(index).iPriority; |
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} |
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return priority; |
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} |