X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/cc9a39576ab6edb139c9bb77d01f4118853e04d2..d8eff331e23435d9d8d6483a40f6fd9997a13f87:/samples/except/except.cpp diff --git a/samples/except/except.cpp b/samples/except/except.cpp index 7d1c9991eb..7ea7b7b159 100644 --- 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 // ---------------------------------------------------------------------------- @@ -79,7 +81,7 @@ public: // program startup virtual bool OnInit(); - // 2nd-level exception handling: we get all the exceptions occuring in any + // 2nd-level exception handling: we get all the exceptions occurring in any // event handler here virtual bool OnExceptionInMainLoop(); @@ -90,6 +92,14 @@ public: // and now for something different: this function is called in case of a // crash (e.g. dereferencing null pointer, division by 0, ...) virtual void OnFatalException(); + + // you can override this function to do something different (e.g. log the + // assert to file) whenever an assertion fails + virtual void OnAssertFailure(const wxChar *file, + int line, + const wxChar *func, + const wxChar *cond, + const wxChar *msg); }; // Define a new frame type: this is going to be our main frame @@ -110,12 +120,24 @@ public: void OnThrowUnhandled(wxCommandEvent& event); void OnCrash(wxCommandEvent& event); +#if wxUSE_ON_FATAL_EXCEPTION void OnHandleCrash(wxCommandEvent& event); +#endif + +protected: // 1st-level exception handling: we overload ProcessEvent() to be able to // catch exceptions which occur in MyFrame methods here virtual bool ProcessEvent(wxEvent& event); + // provoke assert in main or worker thread + // + // this is used to show how an assert failure message box looks like + void OnShowAssert(wxCommandEvent& event); +#if wxUSE_THREADS + void OnShowAssertInThread(wxCommandEvent& event); +#endif // wxUSE_THREADS + private: // any class wishing to process wxWidgets events must use this macro DECLARE_EVENT_TABLE() @@ -161,12 +183,18 @@ class UnhandledException enum { // control ids and menu items - Except_ThrowInt = 100, + Except_ThrowInt = wxID_HIGHEST, Except_ThrowString, Except_ThrowObject, Except_ThrowUnhandled, Except_Crash, +#if wxUSE_ON_FATAL_EXCEPTION Except_HandleCrash, +#endif // wxUSE_ON_FATAL_EXCEPTION + Except_ShowAssert, +#if wxUSE_THREADS + Except_ShowAssertInThread, +#endif // wxUSE_THREADS Except_Dialog, Except_Quit = wxID_EXIT, @@ -189,7 +217,13 @@ BEGIN_EVENT_TABLE(MyFrame, wxFrame) EVT_MENU(Except_ThrowObject, MyFrame::OnThrowObject) EVT_MENU(Except_ThrowUnhandled, MyFrame::OnThrowUnhandled) EVT_MENU(Except_Crash, MyFrame::OnCrash) +#if wxUSE_ON_FATAL_EXCEPTION EVT_MENU(Except_HandleCrash, MyFrame::OnHandleCrash) +#endif // wxUSE_ON_FATAL_EXCEPTION + EVT_MENU(Except_ShowAssert, MyFrame::OnShowAssert) +#if wxUSE_THREADS + EVT_MENU(Except_ShowAssertInThread, MyFrame::OnShowAssertInThread) +#endif // wxUSE_THREADS END_EVENT_TABLE() BEGIN_EVENT_TABLE(MyDialog, wxDialog) @@ -212,6 +246,9 @@ IMPLEMENT_APP(MyApp) // 'Main program' equivalent: the program execution "starts" here bool MyApp::OnInit() { + if ( !wxApp::OnInit() ) + return false; + // create the main application window MyFrame *frame = new MyFrame(); @@ -233,11 +270,11 @@ bool MyApp::OnExceptionInMainLoop() } catch ( int i ) { - wxLogWarning(_T("Caught an int %d in MyApp."), i); + wxLogWarning(wxT("Caught an int %d in MyApp."), i); } catch ( MyException& e ) { - wxLogWarning(_T("Caught MyException(%s) in MyApp."), e.what()); + wxLogWarning(wxT("Caught MyException(%s) in MyApp."), e.what()); } catch ( ... ) { @@ -260,15 +297,37 @@ void MyApp::OnUnhandledException() } catch ( ... ) { - wxMessageBox(_T("Unhandled exception caught, program will terminate."), - _T("wxExcept Sample"), wxOK | wxICON_ERROR); + wxMessageBox(wxT("Unhandled exception caught, program will terminate."), + wxT("wxExcept Sample"), wxOK | wxICON_ERROR); } } void MyApp::OnFatalException() { - wxMessageBox(_T("Program has crashed and will terminate."), - _T("wxExcept Sample"), wxOK | wxICON_ERROR); + wxMessageBox(wxT("Program has crashed and will terminate."), + wxT("wxExcept Sample"), wxOK | wxICON_ERROR); +} + +void MyApp::OnAssertFailure(const wxChar *file, + int line, + const wxChar *func, + const wxChar *cond, + const wxChar *msg) +{ + // 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); + } } // ============================================================================ @@ -277,7 +336,7 @@ void MyApp::OnFatalException() // frame constructor MyFrame::MyFrame() - : wxFrame(NULL, wxID_ANY, _T("Except wxWidgets App"), + : wxFrame(NULL, wxID_ANY, wxT("Except wxWidgets App"), wxPoint(50, 50), wxSize(450, 340)) { // set the frame icon @@ -286,26 +345,34 @@ MyFrame::MyFrame() #if wxUSE_MENUS // create a menu bar wxMenu *menuFile = new wxMenu; - menuFile->Append(Except_Dialog, _T("Show &dialog\tCtrl-D")); + menuFile->Append(Except_Dialog, wxT("Show &dialog\tCtrl-D")); menuFile->AppendSeparator(); - menuFile->Append(Except_ThrowInt, _T("Throw an &int\tCtrl-I")); - menuFile->Append(Except_ThrowString, _T("Throw a &string\tCtrl-S")); - menuFile->Append(Except_ThrowObject, _T("Throw an &object\tCtrl-O")); + menuFile->Append(Except_ThrowInt, wxT("Throw an &int\tCtrl-I")); + menuFile->Append(Except_ThrowString, wxT("Throw a &string\tCtrl-S")); + menuFile->Append(Except_ThrowObject, wxT("Throw an &object\tCtrl-O")); menuFile->Append(Except_ThrowUnhandled, - _T("Throw &unhandled exception\tCtrl-U")); - menuFile->Append(Except_Crash, _T("&Crash\tCtrl-C")); + wxT("Throw &unhandled exception\tCtrl-U")); + menuFile->Append(Except_Crash, wxT("&Crash\tCtrl-C")); + menuFile->AppendSeparator(); +#if wxUSE_ON_FATAL_EXCEPTION + menuFile->AppendCheckItem(Except_HandleCrash, wxT("&Handle crashes\tCtrl-H")); menuFile->AppendSeparator(); - menuFile->AppendCheckItem(Except_HandleCrash, _T("&Handle crashes\tCtrl-H")); +#endif // wxUSE_ON_FATAL_EXCEPTION + 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(); - menuFile->Append(Except_Quit, _T("E&xit\tCtrl-Q"), _T("Quit this program")); + menuFile->Append(Except_Quit, wxT("E&xit\tCtrl-Q"), wxT("Quit this program")); wxMenu *helpMenu = new wxMenu; - helpMenu->Append(Except_About, _T("&About...\tF1"), _T("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(); - menuBar->Append(menuFile, _T("&File")); - menuBar->Append(helpMenu, _T("&Help")); + menuBar->Append(menuFile, wxT("&File")); + menuBar->Append(helpMenu, wxT("&Help")); // ... and attach this menu bar to the frame SetMenuBar(menuBar); @@ -314,7 +381,7 @@ MyFrame::MyFrame() #if wxUSE_STATUSBAR && !defined(__WXWINCE__) // create a status bar just for fun (by default with 1 pane only) CreateStatusBar(2); - SetStatusText(_T("Welcome to wxWidgets!")); + SetStatusText(wxT("Welcome to wxWidgets!")); #endif // wxUSE_STATUSBAR } @@ -326,7 +393,7 @@ bool MyFrame::ProcessEvent(wxEvent& event) } catch ( const wxChar *msg ) { - wxLogMessage(_T("Caught a string \"%s\" in MyFrame"), msg); + wxLogMessage(wxT("Caught a string \"%s\" in MyFrame"), msg); return true; } @@ -348,7 +415,7 @@ void MyFrame::OnDialog(wxCommandEvent& WXUNUSED(event)) } catch ( ... ) { - wxLogWarning(_T("An exception in MyDialog")); + wxLogWarning(wxT("An exception in MyDialog")); Destroy(); throw; @@ -362,12 +429,12 @@ void MyFrame::OnThrowInt(wxCommandEvent& WXUNUSED(event)) void MyFrame::OnThrowString(wxCommandEvent& WXUNUSED(event)) { - throw _T("string thrown from MyFrame"); + throw wxT("string thrown from MyFrame"); } void MyFrame::OnThrowObject(wxCommandEvent& WXUNUSED(event)) { - throw MyException(_T("Exception thrown from MyFrame")); + throw MyException(wxT("Exception thrown from MyFrame")); } void MyFrame::OnThrowUnhandled(wxCommandEvent& WXUNUSED(event)) @@ -380,18 +447,58 @@ void MyFrame::OnCrash(wxCommandEvent& WXUNUSED(event)) DoCrash(); } +#if wxUSE_ON_FATAL_EXCEPTION + void MyFrame::OnHandleCrash(wxCommandEvent& event) { wxHandleFatalExceptions(event.IsChecked()); } +#endif // wxUSE_ON_FATAL_EXCEPTION + +void MyFrame::OnShowAssert(wxCommandEvent& WXUNUSED(event)) +{ + // provoke an assert from wxArrayString + wxArrayString arr; + arr[0]; +} + +#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)) { wxString msg; - msg.Printf( _T("This is the About dialog of the except sample.\n") - _T("Welcome to %s"), wxVERSION_STRING); + msg.Printf( wxT("This is the About dialog of the except sample.\n") + wxT("Welcome to %s"), wxVERSION_STRING); - wxMessageBox(msg, _T("About Except"), wxOK | wxICON_INFORMATION, this); + wxMessageBox(msg, wxT("About Except"), wxOK | wxICON_INFORMATION, this); } // ============================================================================ @@ -399,21 +506,20 @@ void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event)) // ============================================================================ MyDialog::MyDialog(wxFrame *parent) - : wxDialog(parent, wxID_ANY, wxString(_T("Throw exception dialog"))) + : wxDialog(parent, wxID_ANY, wxString(wxT("Throw exception dialog"))) { wxSizer *sizerTop = new wxBoxSizer(wxVERTICAL); - sizerTop->Add(new wxButton(this, Except_ThrowInt, _T("Throw &int")), + sizerTop->Add(new wxButton(this, Except_ThrowInt, wxT("Throw &int")), 0, wxCENTRE | wxALL, 5); - sizerTop->Add(new wxButton(this, Except_ThrowObject, _T("Throw &object")), + sizerTop->Add(new wxButton(this, Except_ThrowObject, wxT("Throw &object")), 0, wxCENTRE | wxALL, 5); - sizerTop->Add(new wxButton(this, Except_Crash, _T("&Crash")), + sizerTop->Add(new wxButton(this, Except_Crash, wxT("&Crash")), 0, wxCENTRE | wxALL, 5); - sizerTop->Add(new wxButton(this, wxID_CANCEL, _T("&Cancel")), + sizerTop->Add(new wxButton(this, wxID_CANCEL, wxT("&Cancel")), 0, wxCENTRE | wxALL, 5); - SetSizer(sizerTop); - sizerTop->Fit(this); + SetSizerAndFit(sizerTop); } void MyDialog::OnThrowInt(wxCommandEvent& WXUNUSED(event)) @@ -423,7 +529,7 @@ void MyDialog::OnThrowInt(wxCommandEvent& WXUNUSED(event)) void MyDialog::OnThrowObject(wxCommandEvent& WXUNUSED(event)) { - throw MyException(_T("Exception thrown from MyDialog")); + throw MyException(wxT("Exception thrown from MyDialog")); } void MyDialog::OnCrash(wxCommandEvent& WXUNUSED(event))