Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_backed_up_2_base_8cpp_source.html
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<h1>examples/Graphics/WS/BackedUp/Base.cpp</h1><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (c) 2005-2009 Nokia Corporation and/or its subsidiary(-ies).</span>
<a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span>
<a name="l00003"></a>00003 <span class="comment">// This component and the accompanying materials are made available</span>
<a name="l00004"></a>00004 <span class="comment">// under the terms of "Eclipse Public License v1.0"</span>
<a name="l00005"></a>00005 <span class="comment">// which accompanies this distribution, and is available</span>
<a name="l00006"></a>00006 <span class="comment">// at the URL "http://www.eclipse.org/legal/epl-v10.html".</span>
<a name="l00007"></a>00007 <span class="comment">//</span>
<a name="l00008"></a>00008 <span class="comment">// Initial Contributors:</span>
<a name="l00009"></a>00009 <span class="comment">// Nokia Corporation - initial contribution.</span>
<a name="l00010"></a>00010 <span class="comment">//</span>
<a name="l00011"></a>00011 <span class="comment">// Contributors:</span>
<a name="l00012"></a>00012 <span class="comment">//</span>
<a name="l00013"></a>00013 <span class="comment">// Description:</span>
<a name="l00014"></a>00014 <span class="comment">//</span>
<a name="l00015"></a>00015
<a name="l00016"></a>00016 <span class="preprocessor">#include <w32std.h></span>
<a name="l00017"></a>00017 <span class="preprocessor">#include "Base.h"</span>
<a name="l00018"></a>00018
<a name="l00020"></a>00020 <span class="comment">// CWindow implementation</span>
<a name="l00022"></a>00022 <span class="comment"></span>
<a name="l00023"></a>00023 CWindow::CWindow(CWsClient* aClient)
<a name="l00024"></a>00024 : iClient(aClient)
<a name="l00025"></a>00025 {
<a name="l00026"></a>00026 }
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="keywordtype">void</span> CWindow::ConstructL (<span class="keyword">const</span> TRect& aRect, <span class="keyword">const</span> TRgb& aColor, CBackedUpWindow* aParent)
<a name="l00029"></a>00029 {
<a name="l00030"></a>00030 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFontName,<span class="stringliteral">"Swiss"</span>);
<a name="l00031"></a>00031 <span class="comment">// If a parent window was specified, use it; if not, use the window group</span>
<a name="l00032"></a>00032 <span class="comment">// (aParent defaults to 0).</span>
<a name="l00033"></a>00033 RWindowTreeNode* parent= aParent ? (RWindowTreeNode*) &(aParent->Window()) : &(iClient->iGroup);
<a name="l00034"></a>00034 <span class="comment">// Allocate and construct the window</span>
<a name="l00035"></a>00035 iWindow=RWindow(iClient->iWs);
<a name="l00036"></a>00036 User::LeaveIfError(iWindow.Construct(*parent, (TUint32)<span class="keyword">this</span>));
<a name="l00037"></a>00037 <span class="comment">// Store the window's extent</span>
<a name="l00038"></a>00038 iRect = aRect;
<a name="l00039"></a>00039 <span class="comment">// Set up the new window's extent</span>
<a name="l00040"></a>00040 User::LeaveIfError(iWindow.SetExtentErr(iRect.iTl, iRect.Size()));
<a name="l00041"></a>00041 <span class="comment">// Set its background color</span>
<a name="l00042"></a>00042 iWindow.SetBackgroundColor (aColor);
<a name="l00043"></a>00043 <span class="comment">// Set pointer grab to enable drag and drop</span>
<a name="l00044"></a>00044 iWindow.SetPointerGrab (ETrue);
<a name="l00045"></a>00045 <span class="comment">// Set up font for displaying text</span>
<a name="l00046"></a>00046 TFontSpec fontSpec(KFontName,200);
<a name="l00047"></a>00047 User::LeaveIfError(iClient->iScreen->GetNearestFontInTwips(iFont,fontSpec));
<a name="l00048"></a>00048 <span class="comment">// Activate the window</span>
<a name="l00049"></a>00049 iWindow.Activate();
<a name="l00050"></a>00050 }
<a name="l00051"></a>00051
<a name="l00052"></a>00052 CWindow::~CWindow()
<a name="l00053"></a>00053 {
<a name="l00054"></a>00054 iWindow.FreePointerMoveBuffer();
<a name="l00055"></a>00055 iWindow.Close();
<a name="l00056"></a>00056 iClient->iScreen->ReleaseFont(iFont);
<a name="l00057"></a>00057 }
<a name="l00058"></a>00058
<a name="l00059"></a>00059 RWindow& CWindow::Window()
<a name="l00060"></a>00060 {
<a name="l00061"></a>00061 <span class="keywordflow">return</span> iWindow;
<a name="l00062"></a>00062 }
<a name="l00063"></a>00063
<a name="l00064"></a>00064 CWindowGc* CWindow::SystemGc()
<a name="l00065"></a>00065 {
<a name="l00066"></a>00066 <span class="keywordflow">return</span> iClient->iGc;
<a name="l00067"></a>00067 }
<a name="l00068"></a>00068
<a name="l00069"></a>00069 CWsScreenDevice* CWindow::Screen()
<a name="l00070"></a>00070 {
<a name="l00071"></a>00071 <span class="keywordflow">return</span> iClient->iScreen;
<a name="l00072"></a>00072 }
<a name="l00073"></a>00073
<a name="l00074"></a>00074 CFont* CWindow::Font()
<a name="l00075"></a>00075 {
<a name="l00076"></a>00076 <span class="keywordflow">return</span> iFont;
<a name="l00077"></a>00077 }
<a name="l00078"></a>00078
<a name="l00080"></a>00080 CBackedUpWindow::CBackedUpWindow(CWsClient* aClient)
<a name="l00081"></a>00081 : iClient(aClient)
<a name="l00082"></a>00082 {
<a name="l00083"></a>00083 }
<a name="l00084"></a>00084
<a name="l00085"></a>00085 <span class="keywordtype">void</span> CBackedUpWindow::ConstructL (<span class="keyword">const</span> TRect& aRect, CWindow* aParent)
<a name="l00086"></a>00086 {
<a name="l00087"></a>00087 <a class="code" href="secureclientandserver_8h.html#a5eadd4429627d82193b37536d4faa03a">_LIT</a>(KFontName,<span class="stringliteral">"Swiss"</span>);
<a name="l00088"></a>00088 <span class="comment">// If a parent window was specified, use it; if not, use the window group</span>
<a name="l00089"></a>00089 <span class="comment">// (aParent defaults to 0).</span>
<a name="l00090"></a>00090 RWindowTreeNode* parent= aParent ? (RWindowTreeNode*) &(aParent->Window()) : &(iClient->iGroup);
<a name="l00091"></a>00091 <span class="comment">// Allocate and construct the window</span>
<a name="l00092"></a>00092 iWindow=RBackedUpWindow(iClient->iWs);
<a name="l00093"></a>00093 User::LeaveIfError(iWindow.Construct(*parent, EGray4, (TUint32)<span class="keyword">this</span>));
<a name="l00094"></a>00094 <span class="comment">// Store the window's extent</span>
<a name="l00095"></a>00095 iRect = aRect;
<a name="l00096"></a>00096 <span class="comment">// Set up the new window's extent</span>
<a name="l00097"></a>00097 User::LeaveIfError(iWindow.SetExtentErr(iRect.iTl, iRect.Size()));
<a name="l00098"></a>00098 <span class="comment">// Set its background color</span>
<a name="l00099"></a>00099 iWindow.AllocPointerMoveBuffer(KPointerMoveBufferSize, 0);
<a name="l00100"></a>00100 iWindow.DisablePointerMoveBuffer();
<a name="l00101"></a>00101 iWindow.PointerFilter(EPointerFilterDrag, 0);
<a name="l00102"></a>00102 <span class="comment">// Set pointer grab to enable drag and drop</span>
<a name="l00103"></a>00103 iWindow.SetPointerGrab (ETrue);
<a name="l00104"></a>00104 <span class="comment">// Set up font for displaying text</span>
<a name="l00105"></a>00105 TFontSpec fontSpec(KFontName,200);
<a name="l00106"></a>00106 User::LeaveIfError(iClient->iScreen->GetNearestFontInTwips(iFont,fontSpec));
<a name="l00107"></a>00107 <span class="comment">// Activate the window</span>
<a name="l00108"></a>00108 iWindow.Activate();
<a name="l00109"></a>00109 }
<a name="l00110"></a>00110
<a name="l00111"></a>00111 CBackedUpWindow::~CBackedUpWindow()
<a name="l00112"></a>00112 {
<a name="l00113"></a>00113 iWindow.Close();
<a name="l00114"></a>00114 iClient->iScreen->ReleaseFont(iFont);
<a name="l00115"></a>00115 }
<a name="l00116"></a>00116
<a name="l00117"></a>00117 RBackedUpWindow& CBackedUpWindow::Window()
<a name="l00118"></a>00118 {
<a name="l00119"></a>00119 <span class="keywordflow">return</span> iWindow;
<a name="l00120"></a>00120 }
<a name="l00121"></a>00121
<a name="l00122"></a>00122 CWindowGc* CBackedUpWindow::SystemGc()
<a name="l00123"></a>00123 {
<a name="l00124"></a>00124 <span class="keywordflow">return</span> iClient->iGc;
<a name="l00125"></a>00125 }
<a name="l00126"></a>00126
<a name="l00127"></a>00127 CWsScreenDevice* CBackedUpWindow::Screen()
<a name="l00128"></a>00128 {
<a name="l00129"></a>00129 <span class="keywordflow">return</span> iClient->iScreen;
<a name="l00130"></a>00130 }
<a name="l00131"></a>00131
<a name="l00132"></a>00132 CFont* CBackedUpWindow::Font()
<a name="l00133"></a>00133 {
<a name="l00134"></a>00134 <span class="keywordflow">return</span> iFont;
<a name="l00135"></a>00135 }
<a name="l00136"></a>00136
<a name="l00137"></a>00137
<a name="l00139"></a>00139 <span class="comment">// CWsRedrawer implementation</span>
<a name="l00141"></a>00141 <span class="comment"></span>
<a name="l00142"></a>00142 CWsRedrawer::CWsRedrawer()
<a name="l00143"></a>00143 : CActive(CActive::EPriorityLow)
<a name="l00144"></a>00144 {
<a name="l00145"></a>00145 }
<a name="l00146"></a>00146
<a name="l00147"></a>00147 <span class="keywordtype">void</span> CWsRedrawer::ConstructL(CWsClient* aClient)
<a name="l00148"></a>00148 {
<a name="l00149"></a>00149 iClient=aClient; <span class="comment">// remember WsClient that owns us</span>
<a name="l00150"></a>00150 CActiveScheduler::Add(<span class="keyword">this</span>); <span class="comment">// add ourselves to the scheduler</span>
<a name="l00151"></a>00151 IssueRequest(); <span class="comment">// issue request to draw</span>
<a name="l00152"></a>00152 }
<a name="l00153"></a>00153
<a name="l00154"></a>00154 CWsRedrawer::~CWsRedrawer()
<a name="l00155"></a>00155 {
<a name="l00156"></a>00156 Cancel();
<a name="l00157"></a>00157 }
<a name="l00158"></a>00158
<a name="l00159"></a>00159 <span class="keywordtype">void</span> CWsRedrawer::IssueRequest()
<a name="l00160"></a>00160 {
<a name="l00161"></a>00161 iClient->iWs.RedrawReady(&iStatus);
<a name="l00162"></a>00162 SetActive();
<a name="l00163"></a>00163 }
<a name="l00164"></a>00164
<a name="l00165"></a>00165 <span class="keywordtype">void</span> CWsRedrawer::DoCancel()
<a name="l00166"></a>00166 {
<a name="l00167"></a>00167 iClient->iWs.RedrawReadyCancel();
<a name="l00168"></a>00168 }
<a name="l00169"></a>00169
<a name="l00170"></a>00170 <span class="keywordtype">void</span> CWsRedrawer::RunL()
<a name="l00171"></a>00171 {
<a name="l00172"></a>00172 <span class="comment">// find out what needs to be done in response to the event</span>
<a name="l00173"></a>00173 TWsRedrawEvent redrawEvent;
<a name="l00174"></a>00174 iClient->iWs.GetRedraw(redrawEvent); <span class="comment">// get event</span>
<a name="l00175"></a>00175 CWindow* window=(CWindow*)(redrawEvent.Handle()); <span class="comment">// get window</span>
<a name="l00176"></a>00176 <span class="keywordflow">if</span> (window)
<a name="l00177"></a>00177 {
<a name="l00178"></a>00178 TRect rect=redrawEvent.Rect(); <span class="comment">// and rectangle that needs redrawing</span>
<a name="l00179"></a>00179 <span class="comment">// now do drawing</span>
<a name="l00180"></a>00180 iClient->iGc->Activate(window->Window());
<a name="l00181"></a>00181 window->Window().BeginRedraw(rect);
<a name="l00182"></a>00182 window->Draw(rect);
<a name="l00183"></a>00183 window->Window().EndRedraw();
<a name="l00184"></a>00184 iClient->iGc->Deactivate();
<a name="l00185"></a>00185 }
<a name="l00186"></a>00186 <span class="comment">// maintain outstanding request</span>
<a name="l00187"></a>00187 IssueRequest();
<a name="l00188"></a>00188 }
<a name="l00189"></a>00189
<a name="l00190"></a>00190
<a name="l00192"></a>00192 <span class="comment">// CWsClient implementation</span>
<a name="l00194"></a>00194 <span class="comment"></span>CWsClient::CWsClient()
<a name="l00195"></a>00195 : CActive(CActive::EPriorityStandard)
<a name="l00196"></a>00196 {
<a name="l00197"></a>00197 }
<a name="l00198"></a>00198
<a name="l00199"></a>00199 <span class="keywordtype">void</span> CWsClient::ConstructL()
<a name="l00200"></a>00200 {
<a name="l00201"></a>00201 <span class="comment">// add ourselves to active scheduler </span>
<a name="l00202"></a>00202 CActiveScheduler::Add(<span class="keyword">this</span>);
<a name="l00203"></a>00203 <span class="comment">// get a session going</span>
<a name="l00204"></a>00204 User::LeaveIfError(iWs.Connect());
<a name="l00205"></a>00205 <span class="comment">// construct our one and only window group</span>
<a name="l00206"></a>00206 iGroup=RWindowGroup(iWs);
<a name="l00207"></a>00207 User::LeaveIfError(iGroup.Construct(2,ETrue)); <span class="comment">// '2' is a meaningless handle</span>
<a name="l00208"></a>00208 <span class="comment">// construct screen device and graphics context</span>
<a name="l00209"></a>00209 iScreen=<span class="keyword">new</span> (ELeave) CWsScreenDevice(iWs); <span class="comment">// make device for this session</span>
<a name="l00210"></a>00210 User::LeaveIfError(iScreen->Construct()); <span class="comment">// and complete its construction</span>
<a name="l00211"></a>00211 User::LeaveIfError(iScreen->CreateContext(iGc)); <span class="comment">// create graphics context</span>
<a name="l00212"></a>00212 <span class="comment">// construct redrawer</span>
<a name="l00213"></a>00213 iRedrawer=<span class="keyword">new</span> (ELeave) CWsRedrawer;
<a name="l00214"></a>00214 iRedrawer->ConstructL(<span class="keyword">this</span>);
<a name="l00215"></a>00215 <span class="comment">// construct main window</span>
<a name="l00216"></a>00216 ConstructMainWindowL();
<a name="l00217"></a>00217 <span class="comment">// request first event and start scheduler</span>
<a name="l00218"></a>00218 IssueRequest();
<a name="l00219"></a>00219 }
<a name="l00220"></a>00220
<a name="l00221"></a>00221 CWsClient::~CWsClient()
<a name="l00222"></a>00222 {
<a name="l00223"></a>00223 <span class="comment">// neutralize us as an active object</span>
<a name="l00224"></a>00224 Deque(); <span class="comment">// cancels and removes from scheduler</span>
<a name="l00225"></a>00225 <span class="comment">// get rid of everything we allocated</span>
<a name="l00226"></a>00226 <span class="keyword">delete</span> iGc;
<a name="l00227"></a>00227 <span class="keyword">delete</span> iScreen;
<a name="l00228"></a>00228 <span class="keyword">delete</span> iRedrawer;
<a name="l00229"></a>00229 <span class="comment">// destroy window group</span>
<a name="l00230"></a>00230 iGroup.Close(); <span class="comment">// what's the difference between this and destroy?</span>
<a name="l00231"></a>00231 <span class="comment">// finish with window server</span>
<a name="l00232"></a>00232 iWs.Close();
<a name="l00233"></a>00233 }
<a name="l00234"></a>00234
<a name="l00235"></a>00235 <span class="keywordtype">void</span> CWsClient::IssueRequest()
<a name="l00236"></a>00236 {
<a name="l00237"></a>00237 iWs.EventReady(&iStatus); <span class="comment">// request an event</span>
<a name="l00238"></a>00238 SetActive(); <span class="comment">// so we're now active</span>
<a name="l00239"></a>00239 }
<a name="l00240"></a>00240
<a name="l00241"></a>00241 <span class="keywordtype">void</span> CWsClient::DoCancel()
<a name="l00242"></a>00242 {
<a name="l00243"></a>00243 iWs.EventReadyCancel(); <span class="comment">// cancel event request</span>
<a name="l00244"></a>00244 }
<a name="l00245"></a>00245
<a name="l00246"></a>00246 <span class="keywordtype">void</span> CWsClient::ConstructMainWindowL()
<a name="l00247"></a>00247 {
<a name="l00248"></a>00248 }
<a name="l00249"></a>00249
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