wg__application_8cpp-source.html

一个小巧的嵌入式图形系统wGUI, 可以用VC编译

00139 
<a name="l00140"></a><a class="code" href="classwGui_1_1CApplication.html#a6">00140</a> <span class="keywordtype">void</span> CApplication::SetKeyFocus(<a class="code" href="classwGui_1_1CWindow.html">CWindow</a>* pWindow)
00141 {
00142      <span class="comment">// notify the window that's losing focus to repaint itself</span>
00143      <span class="keywordflow">if</span> (m_pKeyFocusWindow)
00144      {
00145           CMessageServer::Instance().QueueMessage(<span class="keyword">new</span> <a class="code" href="classwGui_1_1CMessage.html">CMessage</a>(CMessage::APP_PAINT, <a class="code" href="classwGui_1_1CApplication.html#n6">m_pKeyFocusWindow</a>, <span class="keyword">this</span>));
00146      }
00147      <a class="code" href="classwGui_1_1CApplication.html#n6">m_pKeyFocusWindow</a> = pWindow;
00148 }
00149 
00150 
<a name="l00151"></a><a class="code" href="classwGui_1_1CApplication.html#a8">00151</a> <span class="keywordtype">void</span> CApplication::SetMouseFocus(<a class="code" href="classwGui_1_1CWindow.html">CWindow</a>* pWindow)
00152 {
00153      <span class="comment">// notify the window that's losing focus to repaint itself</span>
00154      <span class="keywordflow">if</span> (m_pMouseFocusWindow)
00155      {
00156           CMessageServer::Instance().QueueMessage(<span class="keyword">new</span> <a class="code" href="classwGui_1_1CMessage.html">CMessage</a>(CMessage::APP_PAINT, <a class="code" href="classwGui_1_1CApplication.html#n7">m_pMouseFocusWindow</a>, <span class="keyword">this</span>));
00157      }
00158      <a class="code" href="classwGui_1_1CApplication.html#n7">m_pMouseFocusWindow</a> = pWindow;
00159 }
00160 
00161 
00162 
<a name="l00163"></a><a class="code" href="classwGui_1_1CApplication.html#a10">00163</a> <span class="keywordtype">void</span> CApplication::Init(<span class="keywordtype">void</span>)
00164 {
00165      CMessageServer::Instance().RegisterMessageClient(<span class="keyword">this</span>, CMessage::APP_EXIT, CMessageServer::PRIORITY_LAST);
00166      SDL_EnableUNICODE(1);
00167 
00168      <span class="comment">// Now we have to find the wGui.conf file and load it into the Global Config</span>
00169      <span class="comment">// Our ordered search path is (so the current directory will overwrite any common settings with the other directories):</span>
00170      <span class="comment">// &lt;global directory&gt;</span>
00171      <span class="comment">// &lt;home directory&gt;</span>
00172      <span class="comment">// &lt;current directory&gt;</span>
00173 
00174      <span class="comment">// global directory first</span>
00175      <a class="code" href="classwGui_1_1CApplication.html#n15">m_GlobalConfig</a>.<a class="code" href="classwGui_1_1CConfigStore.html#a11">ReadFromFile</a>(GLOBAL_CONFIG_PATH + <span class="stringliteral">"wgui.conf"</span>);
00176 
00177      <span class="comment">// now the home directory</span>
00178      <a class="code" href="classwGui_1_1CApplication.html#n15">m_GlobalConfig</a>.<a class="code" href="classwGui_1_1CConfigStore.html#a11">ReadFromFile</a>(USER_CONFIG_PATH + <span class="stringliteral">"wgui.conf"</span>);
00179 
00180      <span class="comment">// and finally the current directory</span>
00181      <a class="code" href="classwGui_1_1CApplication.html#n15">m_GlobalConfig</a>.<a class="code" href="classwGui_1_1CConfigStore.html#a11">ReadFromFile</a>(<span class="stringliteral">"wgui.conf"</span>);
00182 
00183      <span class="keywordflow">if</span> (<a class="code" href="classwGui_1_1CApplication.html#n15">m_GlobalConfig</a>.<a class="code" href="classwGui_1_1CConfigStore.html#a9">EntryExists</a>(<span class="stringliteral">"DEFAULTFONT"</span>))
00184      {
00185           <span class="keywordflow">if</span> (<a class="code" href="classwGui_1_1CApplication.html#n15">m_GlobalConfig</a>.<a class="code" href="classwGui_1_1CConfigStore.html#a9">EntryExists</a>(<span class="stringliteral">"DEFAULTFONTSIZE"</span>))
00186           {
00187                <a class="code" href="classwGui_1_1CApplication.html#n9">m_pDefaultFontEngine</a> = <a class="code" href="classwGui_1_1CApplication.html#a13">GetFontEngine</a>(<a class="code" href="classwGui_1_1CApplication.html#n15">m_GlobalConfig</a>.<a class="code" href="classwGui_1_1CConfigStore.html#a2">GetStringEntry</a>(<span class="stringliteral">"DEFAULTFONT"</span>).second,
00188                     static_cast&lt;unsigned char&gt;(<a class="code" href="classwGui_1_1CApplication.html#n15">m_GlobalConfig</a>.<a class="code" href="classwGui_1_1CConfigStore.html#a3">GetLongIntEntry</a>(<span class="stringliteral">"DEFAULTFONTSIZE"</span>).second));
00189           }
00190           <span class="keywordflow">else</span>
00191           {
00192                <a class="code" href="classwGui_1_1CApplication.html#n9">m_pDefaultFontEngine</a> = <a class="code" href="classwGui_1_1CApplication.html#a13">GetFontEngine</a>(<a class="code" href="classwGui_1_1CApplication.html#n15">m_GlobalConfig</a>.<a class="code" href="classwGui_1_1CConfigStore.html#a2">GetStringEntry</a>(<span class="stringliteral">"DEFAULTFONT"</span>).second);
00193           }
00194      }
00195 
00196      <a class="code" href="classwGui_1_1CApplication.html#n5">m_bInited</a> = <span class="keyword">true</span>;
00197 }
00198 
00199 
<a name="l00200"></a><a class="code" href="classwGui_1_1CApplication.html#a11">00200</a> <span class="keywordtype">void</span> CApplication::Exec(<span class="keywordtype">void</span>)
00201 {
00202      <span class="keywordflow">try</span>
00203      {
00204           <span class="keywordflow">if</span> (!<a class="code" href="classwGui_1_1CApplication.html#n5">m_bInited</a>)
00205           {
00206                <span class="keywordflow">throw</span>(<a class="code" href="classwGui_1_1Wg__Ex__App.html">Wg_Ex_App</a>(<span class="stringliteral">"CApplication::Exec : Application Init() was not called!"</span>));
00207           }
00208 
00209           <a class="code" href="classwGui_1_1CApplication.html#n4">m_bRunning</a> = <span class="keyword">true</span>;
00210           SDL_Event event;
00211           CMessageServer::Instance().QueueMessage(<span class="keyword">new</span> <a class="code" href="classwGui_1_1CMessage.html">CMessage</a>(CMessage::APP_PAINT, 0, <span class="keyword">this</span>));
00212           <span class="keywordflow">while</span> (m_bRunning)
00213           {
00214                <span class="keywordflow">while</span> (SDL_PollEvent(&amp;event))
00215                {
00216                     <a class="code" href="classwGui_1_1CApplication.html#b0">HandleSDLEvent</a>(event);
00217                }
00218                <span class="keywordflow">while</span> (!CMessageServer::Instance().MessageAvailable())
00219                {
00220                     <span class="keywordflow">while</span> (SDL_PollEvent(&amp;event))
00221                     {
00222                          <a class="code" href="classwGui_1_1CApplication.html#b0">HandleSDLEvent</a>(event);
00223                     }
00224                     SDL_Delay(5);
00225                }
00226                <span class="keywordflow">try</span>
00227                {
00228                     CMessageServer::Instance().DeliverMessage();
00229                }
00230                <span class="keywordflow">catch</span> (<a class="code" href="classwGui_1_1Wg__Ex__Base.html">Wg_Ex_Base</a>&amp; DEBUG_ONLY(e))
00231                {
00232                     <span class="keywordflow">if</span> (!<a class="code" href="classwGui_1_1CApplication.html#n10">m_bHandleExceptionsInternally</a>)
00233                     {
00234                          <span class="keywordflow">throw</span>;
00235                     }
00236                     <span class="comment">// Since we're handling exceptions internally, and it's one of our own exceptions, we're just going to</span>
00237                     <span class="comment">// send something to the debug output and then continue processing the message queue</span>
00238                     Trace(<span class="stringliteral">"wGui exception while delivering message : "</span> + e.std_what());
00239                }
00240           }
00241      }
00242      <span class="keywordflow">catch</span> (<a class="code" href="classwGui_1_1Wg__Ex__Base.html">Wg_Ex_Base</a>&amp; DEBUG_ONLY(e))
00243      {
00244           <span class="keywordflow">if</span> (!<a class="code" href="classwGui_1_1CApplication.html#n10">m_bHandleExceptionsInternally</a>)
00245           {
00246                <span class="keywordflow">throw</span>;
00247           }
00248           <span class="comment">// We are supposed to handle all exceptions internally, but something hasn't been handled at this point, so we need to exit gracefully</span>
00249           Trace(<span class="stringliteral">"Unhandled wGui exception : "</span> + e.std_what());
00250      }
00251      <span class="keywordflow">catch</span> (std::exception&amp; DEBUG_ONLY(e))
00252      {
00253           <span class="keywordflow">if</span> (!<a class="code" href="classwGui_1_1CApplication.html#n10">m_bHandleExceptionsInternally</a>)
00254           {
00255                <span class="keywordflow">throw</span>;
00256           }
00257           <span class="comment">// We are supposed to handle all exceptions internally, but something hasn't been handled at this point, so we need to exit gracefully</span>
00258           Trace(<span class="stringliteral">"Unhandled std exception : "</span> + std::string(e.what()));
00259      }
00260      <span class="keywordflow">catch</span> (...)
00261      {
00262           <span class="keywordflow">if</span> (!<a class="code" href="classwGui_1_1CApplication.html#n10">m_bHandleExceptionsInternally</a>)
00263           {
00264                <span class="keywordflow">throw</span>;
00265           }
00266           <span class="comment">// We are supposed to handle all exceptions internally, but something hasn't been handled at this point, so we need to exit gracefully</span>
00267           Trace(<span class="stringliteral">"Unhandled exception"</span>);
00268      }
00269 }
00270 
00271 
<a name="l00272"></a><a class="code" href="classwGui_1_1CApplication.html#a12">00272</a> <span class="keywordtype">void</span> CApplication::ApplicationExit(<span class="keywordtype">int</span> iExitCode)
00273 {
00274      <span class="comment">// push an event into the SDL queue so the SDLEventLoopThread can exit</span>
00275      <span class="comment">// the actual contents of the event are not a concern as it serves just to trigger the SDL_WaitEvent</span>
00276      SDL_Event user_event;
00277      user_event.type=SDL_USEREVENT;
00278      user_event.user.code=0;
00279      user_event.user.data1=0;
00280      user_event.user.data2=0;
00281      DEBUG_ONLY(<span class="keywordtype">int</span> iResult =) SDL_PushEvent(&amp;user_event);
00282      TraceIf(iResult == -1, <span class="stringliteral">"CApplication::ApplicationExit - Unable to push SDL user_event."</span>);
00283      <a class="code" href="classwGui_1_1CApplication.html#n3">m_iExitCode</a> = iExitCode;
00284      <a class="code" href="classwGui_1_1CApplication.html#n4">m_bRunning</a> = <span class="keyword">false</span>;