X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/9154d8cfff9f6a58ccec94bf242086e7e10ea91b..de505a9e23cfaa4ada2bf972290f7d15a9424270:/src/common/appcmn.cpp?ds=inline

diff --git a/src/common/appcmn.cpp b/src/common/appcmn.cpp
index 3e0ecff929..fec6879ea6 100644
--- a/src/common/appcmn.cpp
+++ b/src/common/appcmn.cpp
@@ -42,6 +42,7 @@
 #include "wx/confbase.h"
 #include "wx/tokenzr.h"
 #include "wx/utils.h"
+#include "wx/msgout.h"
 
 #if wxUSE_GUI
     #include "wx/artprov.h"
@@ -83,8 +84,21 @@ wxAppBase::wxAppBase()
 #if wxUSE_GUI
     m_topWindow = (wxWindow *)NULL;
     m_useBestVisual = FALSE;
-    m_exitOnFrameDelete = TRUE;
     m_isActive = TRUE;
+
+    // We don't want to exit the app if the user code shows a dialog from its
+    // OnInit() -- but this is what would happen if we set m_exitOnFrameDelete
+    // to Yes initially as this dialog would be the last top level window.
+    // OTOH, if we set it to No initially we'll have to overwrite it with Yes
+    // when we enter our OnRun() because we do want the default behaviour from
+    // then on. But this would be a problem if the user code calls
+    // SetExitOnFrameDelete(FALSE) from OnInit().
+    //
+    // So we use the special "Later" value which is such that
+    // GetExitOnFrameDelete() returns FALSE for it but which we know we can
+    // safely (i.e. without losing the effect of the users SetExitOnFrameDelete
+    // call) overwrite in OnRun()
+    m_exitOnFrameDelete = Later;
 #endif // wxUSE_GUI
 
 #ifdef __WXDEBUG__
@@ -98,6 +112,7 @@ wxAppBase::~wxAppBase()
 }
 
 #if wxUSE_GUI
+
 bool wxAppBase::OnInitGui()
 {
 #ifdef __WXUNIVERSAL__
@@ -110,6 +125,20 @@ bool wxAppBase::OnInitGui()
 
     return TRUE;
 }
+
+int wxAppBase::OnRun()
+{
+    // see the comment in ctor: if the initial value hasn't been changed, use
+    // the default Yes from now on
+    if ( m_exitOnFrameDelete == Later )
+    {
+        m_exitOnFrameDelete = Yes;
+    }
+    //else: it has been changed, assume the user knows what he is doing
+
+    return MainLoop();
+}
+
 #endif // wxUSE_GUI
 
 int wxAppBase::OnExit()
@@ -188,12 +217,34 @@ int wxAppBase::FilterEvent(wxEvent& WXUNUSED(event))
     return -1;
 }
 
+void wxAppBase::DoInit()
+{
+    if (wxMessageOutput::Get())
+        return;
+        
+    // NB: The standard way of printing help on command line arguments (app --help)
+    //     is (according to common practice):
+    //     - console apps: to stderr (on any platform)
+    //     - GUI apps: stderr on Unix platforms (!)
+    //                 message box under Windows and others
+#if wxUSE_GUI && !defined(__UNIX__)
+    #ifdef __WXMOTIF__
+    wxMessageOutput::Set(new wxMessageOutputLog);
+    #else
+    wxMessageOutput::Set(new wxMessageOutputMessageBox);
+    #endif
+#else
+    wxMessageOutput::Set(new wxMessageOutputStderr);
+#endif
+}
+
 // ----------------------------------------------------------------------------
 // cmd line parsing
 // ----------------------------------------------------------------------------
 
 bool wxAppBase::OnInit()
 {
+    DoInit();
 #if wxUSE_CMDLINE_PARSER
     wxCmdLineParser parser(argc, argv);
 
@@ -424,23 +475,22 @@ void wxTrap()
 
 // show the assert modal dialog
 static
-void ShowAssertDialog(const wxChar *szFile, int nLine, const wxChar *szMsg)
+void ShowAssertDialog(const wxChar *szFile,
+                      int nLine,
+                      const wxChar *szCond,
+                      const wxChar *szMsg)
 {
     // this variable can be set to true to suppress "assert failure" messages
     static bool s_bNoAsserts = FALSE;
 
     wxChar szBuf[4096];
 
-    // make life easier for people using VC++ IDE: clicking on the message
-    // will take us immediately to the place of the failed assert
+    // make life easier for people using VC++ IDE by using this format: like
+    // this, clicking on the message will take us immediately to the place of
+    // the failed assert
     wxSnprintf(szBuf, WXSIZEOF(szBuf),
-#ifdef __VISUALC__
-               wxT("%s(%d): assert failed"),
-#else  // !VC++
-    // make the error message more clear for all the others
-               wxT("Assert failed in file %s at line %d"),
-#endif // VC/!VC
-               szFile, nLine);
+               wxT("%s(%d): assert \"%s\" failed"),
+               szFile, nLine, szCond);
 
     if ( szMsg != NULL )
     {
@@ -501,7 +551,10 @@ void ShowAssertDialog(const wxChar *szFile, int nLine, const wxChar *szMsg)
 }
 
 // this function is called when an assert fails
-void wxOnAssert(const wxChar *szFile, int nLine, const wxChar *szMsg)
+void wxOnAssert(const wxChar *szFile,
+                int nLine,
+                const wxChar *szCond,
+                const wxChar *szMsg)
 {
     // FIXME MT-unsafe
     static bool s_bInAssert = FALSE;
@@ -522,20 +575,23 @@ void wxOnAssert(const wxChar *szFile, int nLine, const wxChar *szMsg)
     {
         // by default, show the assert dialog box - we can't customize this
         // behaviour
-        ShowAssertDialog(szFile, nLine, szMsg);
+        ShowAssertDialog(szFile, nLine, szCond, szMsg);
     }
     else
     {
         // let the app process it as it wants
-        wxTheApp->OnAssert(szFile, nLine, szMsg);
+        wxTheApp->OnAssert(szFile, nLine, szCond, szMsg);
     }
 
     s_bInAssert = FALSE;
 }
 
-void wxAppBase::OnAssert(const wxChar *file, int line, const wxChar *msg)
+void wxAppBase::OnAssert(const wxChar *file,
+                         int line,
+                         const wxChar *cond,
+                         const wxChar *msg)
 {
-    ShowAssertDialog(file, line, msg);
+    ShowAssertDialog(file, line, cond, msg);
 }
 
 #endif  //WXDEBUG