Support using GetTextExtent() with empty string to get descent in wxOSX.

[wxWidgets.git] / samples / except / except.cpp

diff --git a/samples/except/except.cpp b/samples/except/except.cpp
index db66fb76de4b7be935a1eeac25e660b06ad73d35..1cb291eeb583490cd4ef4b360527d5bab478f839 100644 (file)
--- a/samples/except/except.cpp
+++ b/samples/except/except.cpp
@@ -44,6 +44,8 @@
     #include "wx/utils.h"
     #include "wx/msgdlg.h"
     #include "wx/icon.h"
+
+    #include "wx/thread.h"
 #endif
 
 // ----------------------------------------------------------------------------
@@ -51,7 +53,7 @@
 // ----------------------------------------------------------------------------
 
 // the application icon (under Windows and OS/2 it is in resources)
-#if defined(__WXGTK__) || defined(__WXMOTIF__) || defined(__WXMAC__) || defined(__WXMGL__) || defined(__WXX11__)
+#ifndef wxHAS_IMAGES_IN_RESOURCES
     #include "../sample.xpm"
 #endif
 
@@ -118,6 +120,7 @@ public:
     void OnThrowUnhandled(wxCommandEvent& event);
 
     void OnCrash(wxCommandEvent& event);
+    void OnTrap(wxCommandEvent& event);
 #if wxUSE_ON_FATAL_EXCEPTION
     void OnHandleCrash(wxCommandEvent& event);
 #endif
@@ -128,10 +131,13 @@ protected:
     // catch exceptions which occur in MyFrame methods here
     virtual bool ProcessEvent(wxEvent& event);
 
-#ifdef __WXDEBUG__
-    // show how an assert failure message box looks like
+    // provoke assert in main or worker thread
+    //
+    // this is used to show how an assert failure message box looks like
     void OnShowAssert(wxCommandEvent& event);
-#endif // __WXDEBUG__
+#if wxUSE_THREADS
+    void OnShowAssertInThread(wxCommandEvent& event);
+#endif // wxUSE_THREADS
 
 private:
     // any class wishing to process wxWidgets events must use this macro
@@ -183,12 +189,14 @@ enum
     Except_ThrowObject,
     Except_ThrowUnhandled,
     Except_Crash,
+    Except_Trap,
 #if wxUSE_ON_FATAL_EXCEPTION
     Except_HandleCrash,
 #endif // wxUSE_ON_FATAL_EXCEPTION
-#ifdef __WXDEBUG__
     Except_ShowAssert,
-#endif // __WXDEBUG__
+#if wxUSE_THREADS
+    Except_ShowAssertInThread,
+#endif // wxUSE_THREADS
     Except_Dialog,
 
     Except_Quit = wxID_EXIT,
@@ -211,12 +219,14 @@ BEGIN_EVENT_TABLE(MyFrame, wxFrame)
     EVT_MENU(Except_ThrowObject, MyFrame::OnThrowObject)
     EVT_MENU(Except_ThrowUnhandled, MyFrame::OnThrowUnhandled)
     EVT_MENU(Except_Crash, MyFrame::OnCrash)
+    EVT_MENU(Except_Trap, MyFrame::OnTrap)
 #if wxUSE_ON_FATAL_EXCEPTION
     EVT_MENU(Except_HandleCrash, MyFrame::OnHandleCrash)
 #endif // wxUSE_ON_FATAL_EXCEPTION
-#ifdef __WXDEBUG__
     EVT_MENU(Except_ShowAssert, MyFrame::OnShowAssert)
-#endif // __WXDEBUG__
+#if wxUSE_THREADS
+    EVT_MENU(Except_ShowAssertInThread, MyFrame::OnShowAssertInThread)
+#endif // wxUSE_THREADS
 END_EVENT_TABLE()
 
 BEGIN_EVENT_TABLE(MyDialog, wxDialog)
@@ -307,14 +317,17 @@ void MyApp::OnAssertFailure(const wxChar *file,
                             const wxChar *cond,
                             const wxChar *msg)
 {
-    if ( wxMessageBox
-         (
-            wxString::Format("An assert failed in %s().", func) +
-            "\n"
-            "Do you want to call the default assert handler?",
-            "wxExcept Sample",
-            wxYES_NO | wxICON_QUESTION
-         ) == wxYES )
+    // take care to not show the message box from a worker thread, this doesn't
+    // work as it doesn't have any event loop
+    if ( !wxIsMainThread() ||
+            wxMessageBox
+            (
+                wxString::Format("An assert failed in %s().", func) +
+                "\n"
+                "Do you want to call the default assert handler?",
+                "wxExcept Sample",
+                wxYES_NO | wxICON_QUESTION
+            ) == wxYES )
     {
         wxApp::OnAssertFailure(file, line, func, cond, msg);
     }
@@ -343,19 +356,23 @@ MyFrame::MyFrame()
     menuFile->Append(Except_ThrowUnhandled,
                         wxT("Throw &unhandled exception\tCtrl-U"));
     menuFile->Append(Except_Crash, wxT("&Crash\tCtrl-C"));
+    menuFile->Append(Except_Trap, "&Trap\tCtrl-T",
+                     "Break into the debugger (if one is running)");
     menuFile->AppendSeparator();
 #if wxUSE_ON_FATAL_EXCEPTION
     menuFile->AppendCheckItem(Except_HandleCrash, wxT("&Handle crashes\tCtrl-H"));
     menuFile->AppendSeparator();
 #endif // wxUSE_ON_FATAL_EXCEPTION
-#ifdef __WXDEBUG__
     menuFile->Append(Except_ShowAssert, wxT("Provoke &assert failure\tCtrl-A"));
+#if wxUSE_THREADS
+    menuFile->Append(Except_ShowAssertInThread,
+                     wxT("Assert failure in &thread\tShift-Ctrl-A"));
+#endif // wxUSE_THREADS
     menuFile->AppendSeparator();
-#endif // __WXDEBUG__
     menuFile->Append(Except_Quit, wxT("E&xit\tCtrl-Q"), wxT("Quit this program"));
 
     wxMenu *helpMenu = new wxMenu;
-    helpMenu->Append(Except_About, wxT("&About...\tF1"), wxT("Show about dialog"));
+    helpMenu->Append(Except_About, wxT("&About\tF1"), wxT("Show about dialog"));
 
     // now append the freshly created menu to the menu bar...
     wxMenuBar *menuBar = new wxMenuBar();
@@ -435,6 +452,11 @@ void MyFrame::OnCrash(wxCommandEvent& WXUNUSED(event))
     DoCrash();
 }
 
+void MyFrame::OnTrap(wxCommandEvent& WXUNUSED(event))
+{
+    wxTrap();
+}
+
 #if wxUSE_ON_FATAL_EXCEPTION
 
 void MyFrame::OnHandleCrash(wxCommandEvent& event)
@@ -444,8 +466,6 @@ void MyFrame::OnHandleCrash(wxCommandEvent& event)
 
 #endif // wxUSE_ON_FATAL_EXCEPTION
 
-#ifdef __WXDEBUG__
-
 void MyFrame::OnShowAssert(wxCommandEvent& WXUNUSED(event))
 {
     // provoke an assert from wxArrayString
@@ -453,7 +473,34 @@ void MyFrame::OnShowAssert(wxCommandEvent& WXUNUSED(event))
     arr[0];
 }
 
-#endif // __WXDEBUG__
+#if wxUSE_THREADS
+
+void MyFrame::OnShowAssertInThread(wxCommandEvent& WXUNUSED(event))
+{
+    class AssertThread : public wxThread
+    {
+    public:
+        AssertThread()
+            : wxThread(wxTHREAD_JOINABLE)
+        {
+        }
+
+    protected:
+        virtual void *Entry()
+        {
+            wxFAIL_MSG("Test assert in another thread.");
+
+            return 0;
+        }
+    };
+
+    AssertThread thread;
+    thread.Create();
+    thread.Run();
+    thread.Wait();
+}
+
+#endif // wxUSE_THREADS
 
 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 {