Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/_pt_buffer_2_base_8cpp_source.html
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<title>TB9.2 Example Applications: examples/Graphics/WS/PtBuffer/Base.cpp Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="doxygen.css" rel="stylesheet" type="text/css"/>
</head>
<body>
<!-- Generated by Doxygen 1.6.2 -->
<h1>examples/Graphics/WS/PtBuffer/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, CWindow* aParent)
<a name="l00029"></a>00029 {
<a name="l00030"></a>00030 <span class="comment">// If a parent window was specified, use it; if not, use the window group</span>
<a name="l00031"></a>00031 <span class="comment">// (aParent defaults to 0).</span>
<a name="l00032"></a>00032 RWindowTreeNode* parent= aParent ? (RWindowTreeNode*) &(aParent->Window()) : &(iClient->iGroup);
<a name="l00033"></a>00033 <span class="comment">// Allocate and construct the window</span>
<a name="l00034"></a>00034 iWindow=RWindow(iClient->iWs);
<a name="l00035"></a>00035 User::LeaveIfError(iWindow.Construct(*parent,(TUint32)<span class="keyword">this</span>));
<a name="l00036"></a>00036 <span class="comment">// Store the window's extent</span>
<a name="l00037"></a>00037 iRect = aRect;
<a name="l00038"></a>00038 <span class="comment">// Set up the new window's extent</span>
<a name="l00039"></a>00039 iWindow.SetExtent(iRect.iTl, iRect.Size());
<a name="l00040"></a>00040 <span class="comment">// Set its background color</span>
<a name="l00041"></a>00041 iWindow.SetBackgroundColor (aColor);
<a name="l00042"></a>00042 <span class="comment">// Set pointer grab to enable drag and drop</span>
<a name="l00043"></a>00043 iWindow.SetPointerGrab (ETrue);
<a name="l00044"></a>00044 <span class="comment">// Allocate pointer move buffer for freehand drawing</span>
<a name="l00045"></a>00045 iWindow.AllocPointerMoveBuffer(KPointerMoveBufferSize, 0);
<a name="l00046"></a>00046 iWindow.DisablePointerMoveBuffer();
<a name="l00047"></a>00047 <span class="comment">// Tell the window server to deliver drag events</span>
<a name="l00048"></a>00048 iWindow.PointerFilter(EPointerFilterDrag, 0);
<a name="l00049"></a>00049 <span class="comment">// Activate the window</span>
<a name="l00050"></a>00050 iWindow.Activate();
<a name="l00051"></a>00051 }
<a name="l00052"></a>00052
<a name="l00053"></a>00053 CWindow::~CWindow()
<a name="l00054"></a>00054 {
<a name="l00055"></a>00055 iWindow.FreePointerMoveBuffer();
<a name="l00056"></a>00056 iWindow.Close();
<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="l00075"></a>00075 <span class="comment">// CWsRedrawer implementation</span>
<a name="l00077"></a>00077 <span class="comment"></span>
<a name="l00078"></a>00078 CWsRedrawer::CWsRedrawer()
<a name="l00079"></a>00079 : CActive(CActive::EPriorityLow)
<a name="l00080"></a>00080 {
<a name="l00081"></a>00081 }
<a name="l00082"></a>00082
<a name="l00083"></a>00083 <span class="keywordtype">void</span> CWsRedrawer::ConstructL(CWsClient* aClient)
<a name="l00084"></a>00084 {
<a name="l00085"></a>00085 iClient=aClient; <span class="comment">// remember WsClient that owns us</span>
<a name="l00086"></a>00086 CActiveScheduler::Add(<span class="keyword">this</span>); <span class="comment">// add ourselves to the scheduler</span>
<a name="l00087"></a>00087 IssueRequest(); <span class="comment">// issue request to draw</span>
<a name="l00088"></a>00088 }
<a name="l00089"></a>00089
<a name="l00090"></a>00090 CWsRedrawer::~CWsRedrawer()
<a name="l00091"></a>00091 {
<a name="l00092"></a>00092 Cancel();
<a name="l00093"></a>00093 }
<a name="l00094"></a>00094
<a name="l00095"></a>00095 <span class="keywordtype">void</span> CWsRedrawer::IssueRequest()
<a name="l00096"></a>00096 {
<a name="l00097"></a>00097 iClient->iWs.RedrawReady(&iStatus);
<a name="l00098"></a>00098 SetActive();
<a name="l00099"></a>00099 }
<a name="l00100"></a>00100
<a name="l00101"></a>00101 <span class="keywordtype">void</span> CWsRedrawer::DoCancel()
<a name="l00102"></a>00102 {
<a name="l00103"></a>00103 iClient->iWs.RedrawReadyCancel();
<a name="l00104"></a>00104 }
<a name="l00105"></a>00105
<a name="l00106"></a>00106 <span class="keywordtype">void</span> CWsRedrawer::RunL()
<a name="l00107"></a>00107 {
<a name="l00108"></a>00108 <span class="comment">// find out what needs to be done in response to the event</span>
<a name="l00109"></a>00109 TWsRedrawEvent redrawEvent;
<a name="l00110"></a>00110 iClient->iWs.GetRedraw(redrawEvent); <span class="comment">// get event</span>
<a name="l00111"></a>00111 CWindow* window=(CWindow*)(redrawEvent.Handle()); <span class="comment">// get window</span>
<a name="l00112"></a>00112 <span class="keywordflow">if</span> (window)
<a name="l00113"></a>00113 {
<a name="l00114"></a>00114 TRect rect=redrawEvent.Rect(); <span class="comment">// and rectangle that needs redrawing</span>
<a name="l00115"></a>00115 <span class="comment">// now do drawing</span>
<a name="l00116"></a>00116 iClient->iGc->Activate(window->Window());
<a name="l00117"></a>00117 window->Window().BeginRedraw();
<a name="l00118"></a>00118 window->Draw(rect);
<a name="l00119"></a>00119 window->Window().EndRedraw();
<a name="l00120"></a>00120 iClient->iGc->Deactivate();
<a name="l00121"></a>00121 }
<a name="l00122"></a>00122 <span class="comment">// maintain outstanding request</span>
<a name="l00123"></a>00123 IssueRequest();
<a name="l00124"></a>00124 }
<a name="l00125"></a>00125
<a name="l00126"></a>00126
<a name="l00128"></a>00128 <span class="comment">// CWsClient implementation</span>
<a name="l00130"></a>00130 <span class="comment"></span>CWsClient::CWsClient()
<a name="l00131"></a>00131 : CActive(CActive::EPriorityStandard)
<a name="l00132"></a>00132 {
<a name="l00133"></a>00133 }
<a name="l00134"></a>00134
<a name="l00135"></a>00135 <span class="keywordtype">void</span> CWsClient::ConstructL()
<a name="l00136"></a>00136 {
<a name="l00137"></a>00137 <span class="comment">// add ourselves to scheduler</span>
<a name="l00138"></a>00138 CActiveScheduler::Add(<span class="keyword">this</span>);
<a name="l00139"></a>00139 <span class="comment">// get a session going</span>
<a name="l00140"></a>00140 User::LeaveIfError(iWs.Connect());
<a name="l00141"></a>00141 <span class="comment">// construct our one and only window group</span>
<a name="l00142"></a>00142 iGroup=RWindowGroup(iWs);
<a name="l00143"></a>00143 User::LeaveIfError(iGroup.Construct(2,ETrue)); <span class="comment">// '2' is a meaningless handle</span>
<a name="l00144"></a>00144 <span class="comment">// construct screen device and graphics context</span>
<a name="l00145"></a>00145 iScreen=<span class="keyword">new</span> (ELeave) CWsScreenDevice(iWs); <span class="comment">// make device for this session</span>
<a name="l00146"></a>00146 User::LeaveIfError(iScreen->Construct()); <span class="comment">// and complete its construction</span>
<a name="l00147"></a>00147 User::LeaveIfError(iScreen->CreateContext(iGc)); <span class="comment">// create graphics context</span>
<a name="l00148"></a>00148 <span class="comment">// construct redrawer</span>
<a name="l00149"></a>00149 iRedrawer=<span class="keyword">new</span> (ELeave) CWsRedrawer;
<a name="l00150"></a>00150 iRedrawer->ConstructL(<span class="keyword">this</span>);
<a name="l00151"></a>00151 <span class="comment">// construct main window</span>
<a name="l00152"></a>00152 ConstructMainWindowL();
<a name="l00153"></a>00153 <span class="comment">// request first event and start scheduler</span>
<a name="l00154"></a>00154 IssueRequest();
<a name="l00155"></a>00155 }
<a name="l00156"></a>00156
<a name="l00157"></a>00157 CWsClient::~CWsClient()
<a name="l00158"></a>00158 {
<a name="l00159"></a>00159 <span class="comment">// neutralize us as an active object</span>
<a name="l00160"></a>00160 Deque(); <span class="comment">// cancels and removes from scheduler</span>
<a name="l00161"></a>00161 <span class="comment">// get rid of everything we allocated</span>
<a name="l00162"></a>00162 <span class="keyword">delete</span> iGc;
<a name="l00163"></a>00163 <span class="keyword">delete</span> iScreen;
<a name="l00164"></a>00164 <span class="keyword">delete</span> iRedrawer;
<a name="l00165"></a>00165 <span class="comment">// destroy window group</span>
<a name="l00166"></a>00166 iGroup.Close();
<a name="l00167"></a>00167 <span class="comment">// finish with window server</span>
<a name="l00168"></a>00168 iWs.Close();
<a name="l00169"></a>00169 }
<a name="l00170"></a>00170
<a name="l00171"></a>00171 <span class="keywordtype">void</span> CWsClient::IssueRequest()
<a name="l00172"></a>00172 {
<a name="l00173"></a>00173 iWs.EventReady(&iStatus); <span class="comment">// request an event</span>
<a name="l00174"></a>00174 SetActive(); <span class="comment">// so we're now active</span>
<a name="l00175"></a>00175 }
<a name="l00176"></a>00176
<a name="l00177"></a>00177 <span class="keywordtype">void</span> CWsClient::DoCancel()
<a name="l00178"></a>00178 {
<a name="l00179"></a>00179 iWs.EventReadyCancel(); <span class="comment">// cancel event request</span>
<a name="l00180"></a>00180 }
<a name="l00181"></a>00181
<a name="l00182"></a>00182 <span class="keywordtype">void</span> CWsClient::ConstructMainWindowL()
<a name="l00183"></a>00183 {
<a name="l00184"></a>00184 }
<a name="l00185"></a>00185
</pre></div></div>
<hr size="1"/><address style="text-align: right;"><small>Generated by
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address>
</body>
</html>