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 <span id="projectnumber">3.2.3</span>
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<div class="title">/home/koen/project/wt/public-git/wt/examples/hello/hello.C</div> </div>
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<a href="hello_8C.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * Copyright (C) 2008 Emweb bvba, Heverlee, Belgium.</span>
<a name="l00003"></a>00003 <span class="comment"> *</span>
<a name="l00004"></a>00004 <span class="comment"> * See the LICENSE file for terms of use.</span>
<a name="l00005"></a>00005 <span class="comment"> */</span>
<a name="l00006"></a>00006
<a name="l00007"></a>00007 <span class="preprocessor">#include <Wt/WApplication></span>
<a name="l00008"></a>00008 <span class="preprocessor">#include <Wt/WBreak></span>
<a name="l00009"></a>00009 <span class="preprocessor">#include <Wt/WContainerWidget></span>
<a name="l00010"></a>00010 <span class="preprocessor">#include <Wt/WLineEdit></span>
<a name="l00011"></a>00011 <span class="preprocessor">#include <Wt/WPushButton></span>
<a name="l00012"></a>00012 <span class="preprocessor">#include <Wt/WText></span>
<a name="l00013"></a>00013
<a name="l00014"></a>00014 <span class="comment">// c++0x only, for std::bind</span>
<a name="l00015"></a>00015 <span class="comment">// #include <functional></span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="keyword">using namespace </span>Wt;
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="comment">/*</span>
<a name="l00020"></a>00020 <span class="comment"> * A simple hello world application class which demonstrates how to react</span>
<a name="l00021"></a>00021 <span class="comment"> * to events, read input, and give feed-back.</span>
<a name="l00022"></a>00022 <span class="comment"> */</span>
<a name="l00023"></a><a class="code" href="classHelloApplication.html">00023</a> <span class="keyword">class </span><a class="code" href="classHelloApplication.html">HelloApplication</a> : <span class="keyword">public</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WApplication.html">WApplication</a>
<a name="l00024"></a>00024 {
<a name="l00025"></a>00025 <span class="keyword">public</span>:
<a name="l00026"></a>00026 <a class="code" href="classHelloApplication.html">HelloApplication</a>(<span class="keyword">const</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WEnvironment.html">WEnvironment</a>& env);
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="keyword">private</span>:
<a name="l00029"></a><a class="code" href="classHelloApplication.html#a223a6b0ae8f592504528d044b932d4d6">00029</a> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WLineEdit.html">WLineEdit</a> *<a class="code" href="classHelloApplication.html#a223a6b0ae8f592504528d044b932d4d6">nameEdit_</a>;
<a name="l00030"></a><a class="code" href="classHelloApplication.html#a060ca5306a0289f4097ff6f83755cbad">00030</a> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WText.html">WText</a> *<a class="code" href="classHelloApplication.html#a060ca5306a0289f4097ff6f83755cbad">greeting_</a>;
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <span class="keywordtype">void</span> greet();
<a name="l00033"></a>00033 };
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="comment">/*</span>
<a name="l00036"></a>00036 <span class="comment"> * The env argument contains information about the new session, and</span>
<a name="l00037"></a>00037 <span class="comment"> * the initial request. It must be passed to the WApplication</span>
<a name="l00038"></a>00038 <span class="comment"> * constructor so it is typically also an argument for your custom</span>
<a name="l00039"></a>00039 <span class="comment"> * application constructor.</span>
<a name="l00040"></a>00040 <span class="comment">*/</span>
<a name="l00041"></a><a class="code" href="classHelloApplication.html#af8cfe75959bce2e4fba80a46f009c4a6">00041</a> <a class="code" href="classHelloApplication.html#af8cfe75959bce2e4fba80a46f009c4a6">HelloApplication::HelloApplication</a>(<span class="keyword">const</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WEnvironment.html">WEnvironment</a>& env)
<a name="l00042"></a>00042 : <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WApplication.html">WApplication</a>(env)
<a name="l00043"></a>00043 {
<a name="l00044"></a>00044 <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WApplication.html#a71a3f7da5abb9a76df94fab69ba61670">setTitle</a>(<span class="stringliteral">"Hello world"</span>); <span class="comment">// application title</span>
<a name="l00045"></a>00045
<a name="l00046"></a>00046 <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WApplication.html#a17e118a04d962459484a12989a80bc05">root</a>()-><a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WContainerWidget.html#a2cfe66d9b62940f889e99538a9f478d2">addWidget</a>(<span class="keyword">new</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WText.html">WText</a>(<span class="stringliteral">"Your name, please ? "</span>)); <span class="comment">// show some text</span>
<a name="l00047"></a>00047 <a class="code" href="classHelloApplication.html#a223a6b0ae8f592504528d044b932d4d6">nameEdit_</a> = <span class="keyword">new</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WLineEdit.html">WLineEdit</a>(<a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WApplication.html#a17e118a04d962459484a12989a80bc05">root</a>()); <span class="comment">// allow text input</span>
<a name="l00048"></a>00048 <a class="code" href="classHelloApplication.html#a223a6b0ae8f592504528d044b932d4d6">nameEdit_</a>-><a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WFormWidget.html#afe33f5c3658ddbd08fec9f6c203c578b">setFocus</a>(); <span class="comment">// give focus</span>
<a name="l00049"></a>00049
<a name="l00050"></a>00050 <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WPushButton.html">WPushButton</a> *button
<a name="l00051"></a>00051 = <span class="keyword">new</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WPushButton.html">WPushButton</a>(<span class="stringliteral">"Greet me."</span>, <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WApplication.html#a17e118a04d962459484a12989a80bc05">root</a>()); <span class="comment">// create a button</span>
<a name="l00052"></a>00052 button-><a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WWebWidget.html#a9795c18e926b26b97fcbabc62a1dd4e3">setMargin</a>(5, <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/namespaceWt.html#a5a6f4636bcc6ab3c075165d249b3a5a3a6568fecac7c7d7223afaed240bcfdd9e">Left</a>); <span class="comment">// add 5 pixels margin</span>
<a name="l00053"></a>00053
<a name="l00054"></a>00054 <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WApplication.html#a17e118a04d962459484a12989a80bc05">root</a>()-><a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WContainerWidget.html#a2cfe66d9b62940f889e99538a9f478d2">addWidget</a>(<span class="keyword">new</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WBreak.html">WBreak</a>()); <span class="comment">// insert a line break</span>
<a name="l00055"></a>00055
<a name="l00056"></a>00056 <a class="code" href="classHelloApplication.html#a060ca5306a0289f4097ff6f83755cbad">greeting_</a> = <span class="keyword">new</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WText.html">WText</a>(<a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WApplication.html#a17e118a04d962459484a12989a80bc05">root</a>()); <span class="comment">// empty text</span>
<a name="l00057"></a>00057
<a name="l00058"></a>00058 <span class="comment">/*</span>
<a name="l00059"></a>00059 <span class="comment"> * Connect signals with slots</span>
<a name="l00060"></a>00060 <span class="comment"> *</span>
<a name="l00061"></a>00061 <span class="comment"> * - simple Wt-way</span>
<a name="l00062"></a>00062 <span class="comment"> */</span>
<a name="l00063"></a>00063 button-><a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WInteractWidget.html#ae11e050cce0d4a8f742afa3ef92bfe8c">clicked</a>().connect(<span class="keyword">this</span>, &<a class="code" href="classHelloApplication.html#a94de3317a1e6e45964a3dfa9aacef9f9">HelloApplication::greet</a>);
<a name="l00064"></a>00064
<a name="l00065"></a>00065 <span class="comment">/*</span>
<a name="l00066"></a>00066 <span class="comment"> * - using an arbitrary function object (binding values with boost::bind())</span>
<a name="l00067"></a>00067 <span class="comment"> */</span>
<a name="l00068"></a>00068 <a class="code" href="classHelloApplication.html#a223a6b0ae8f592504528d044b932d4d6">nameEdit_</a>-><a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WInteractWidget.html#a38f06d1ad95e7599b055f49931236c10">enterPressed</a>().<a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1EventSignal.html#a36896f54a4db342af24efa6e9d703455">connect</a>
<a name="l00069"></a>00069 (boost::bind(&<a class="code" href="classHelloApplication.html#a94de3317a1e6e45964a3dfa9aacef9f9">HelloApplication::greet</a>, <span class="keyword">this</span>));
<a name="l00070"></a>00070
<a name="l00071"></a>00071 <span class="comment">/*</span>
<a name="l00072"></a>00072 <span class="comment"> * - using a c++0x lambda:</span>
<a name="l00073"></a>00073 <span class="comment"> */</span>
<a name="l00074"></a>00074 <span class="comment">// b->clicked().connect(std::bind([=]() { </span>
<a name="l00075"></a>00075 <span class="comment">// greeting_->setText("Hello there, " + nameEdit_->text());</span>
<a name="l00076"></a>00076 <span class="comment">// }));</span>
<a name="l00077"></a>00077 }
<a name="l00078"></a>00078
<a name="l00079"></a><a class="code" href="classHelloApplication.html#a94de3317a1e6e45964a3dfa9aacef9f9">00079</a> <span class="keywordtype">void</span> <a class="code" href="classHelloApplication.html#a94de3317a1e6e45964a3dfa9aacef9f9">HelloApplication::greet</a>()
<a name="l00080"></a>00080 {
<a name="l00081"></a>00081 <span class="comment">/*</span>
<a name="l00082"></a>00082 <span class="comment"> * Update the text, using text input into the nameEdit_ field.</span>
<a name="l00083"></a>00083 <span class="comment"> */</span>
<a name="l00084"></a>00084 <a class="code" href="classHelloApplication.html#a060ca5306a0289f4097ff6f83755cbad">greeting_</a>-><a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WText.html#a2f788aa524d51b3962642c9f565e66e6">setText</a>(<span class="stringliteral">"Hello there, "</span> + <a class="code" href="classHelloApplication.html#a223a6b0ae8f592504528d044b932d4d6">nameEdit_</a>-><a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WLineEdit.html#ac74b58779cb635898cac13e81d8b0c7a">text</a>());
<a name="l00085"></a>00085 }
<a name="l00086"></a>00086
<a name="l00087"></a><a class="code" href="hello_8C.html#acb337c09cd35644b56da8b0e5bb17b9c">00087</a> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WApplication.html">WApplication</a> *<a class="code" href="ComposeExample_8C.html#acb337c09cd35644b56da8b0e5bb17b9c">createApplication</a>(<span class="keyword">const</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WEnvironment.html">WEnvironment</a>& env)
<a name="l00088"></a>00088 {
<a name="l00089"></a>00089 <span class="comment">/*</span>
<a name="l00090"></a>00090 <span class="comment"> * You could read information from the environment to decide whether</span>
<a name="l00091"></a>00091 <span class="comment"> * the user has permission to start a new application</span>
<a name="l00092"></a>00092 <span class="comment"> */</span>
<a name="l00093"></a>00093 <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="classHelloApplication.html">HelloApplication</a>(env);
<a name="l00094"></a>00094 }
<a name="l00095"></a>00095
<a name="l00096"></a><a class="code" href="hello_8C.html#a3c04138a5bfe5d72780bb7e82a18e627">00096</a> <span class="keywordtype">int</span> <a class="code" href="ComposeExample_8C.html#a3c04138a5bfe5d72780bb7e82a18e627">main</a>(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> **argv)
<a name="l00097"></a>00097 {
<a name="l00098"></a>00098 <span class="comment">/*</span>
<a name="l00099"></a>00099 <span class="comment"> * Your main method may set up some shared resources, but should then</span>
<a name="l00100"></a>00100 <span class="comment"> * start the server application (FastCGI or httpd) that starts listening</span>
<a name="l00101"></a>00101 <span class="comment"> * for requests, and handles all of the application life cycles.</span>
<a name="l00102"></a>00102 <span class="comment"> *</span>
<a name="l00103"></a>00103 <span class="comment"> * The last argument to WRun specifies the function that will instantiate</span>
<a name="l00104"></a>00104 <span class="comment"> * new application objects. That function is executed when a new user surfs</span>
<a name="l00105"></a>00105 <span class="comment"> * to the Wt application, and after the library has negotiated browser</span>
<a name="l00106"></a>00106 <span class="comment"> * support. The function should return a newly instantiated application</span>
<a name="l00107"></a>00107 <span class="comment"> * object.</span>
<a name="l00108"></a>00108 <span class="comment"> */</span>
<a name="l00109"></a>00109 <span class="keywordflow">return</span> WRun(argc, argv, &<a class="code" href="ComposeExample_8C.html#acb337c09cd35644b56da8b0e5bb17b9c">createApplication</a>);
<a name="l00110"></a>00110 }
<a name="l00111"></a>00111
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