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Test throwing exception from wxApp idle handler

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This doesn't work correctly in wxGTK currently, as the exception is not
passed to wxApp::OnExceptionInMainLoop() as expected, but it will be
fixed soon.
This commit is contained in:
Vadim Zeitlin
2025-04-10 16:40:08 +02:00
parent 86e2771276
commit 15f547b5bd
1 changed files with 25 additions and 0 deletions
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samples/except/except.cpp
+25
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@@ -117,12 +117,18 @@ public:
const wxChar *cond,
const wxChar *msg) override;
// Dynamically bound event handler to throw an exception for testing.
void OnIdle(wxIdleEvent& event);
private:
// This stores the number of times StoreCurrentException() was called,
// typically at most 1.
int m_numStoredExceptions;
};
wxDECLARE_APP(MyApp);
// Define a new frame type: this is going to be our main frame
class MyFrame : public wxFrame
{
@@ -140,6 +146,7 @@ public:
void OnThrowObject(wxCommandEvent& event);
void OnThrowUnhandled(wxCommandEvent& event);
void OnThrowFromYield(wxCommandEvent& event);
void OnThrowFromIdle(wxCommandEvent& event);
void OnCrash(wxCommandEvent& event);
void OnTrap(wxCommandEvent& event);
@@ -215,6 +222,7 @@ enum
Except_ThrowObject,
Except_ThrowUnhandled,
Except_ThrowFromYield,
Except_ThrowFromIdle,
Except_Crash,
Except_Trap,
#if wxUSE_ON_FATAL_EXCEPTION
@@ -246,6 +254,7 @@ wxBEGIN_EVENT_TABLE(MyFrame, wxFrame)
EVT_MENU(Except_ThrowObject, MyFrame::OnThrowObject)
EVT_MENU(Except_ThrowUnhandled, MyFrame::OnThrowUnhandled)
EVT_MENU(Except_ThrowFromYield, MyFrame::OnThrowFromYield)
EVT_MENU(Except_ThrowFromIdle, MyFrame::OnThrowFromIdle)
EVT_MENU(Except_Crash, MyFrame::OnCrash)
EVT_MENU(Except_Trap, MyFrame::OnTrap)
#if wxUSE_ON_FATAL_EXCEPTION
@@ -397,6 +406,14 @@ void MyApp::OnAssertFailure(const wxChar *file,
}
}
void MyApp::OnIdle(wxIdleEvent& WXUNUSED(event))
{
// Don't call this handler repeatedly, this would most likely crash.
Unbind(wxEVT_IDLE, &MyApp::OnIdle, this);
throw MyException("Exception thrown from idle event handler");
}
// ============================================================================
// MyFrame implementation
// ============================================================================
@@ -421,6 +438,8 @@ MyFrame::MyFrame()
"Throw &unhandled exception\tCtrl-U");
menuFile->Append(Except_ThrowFromYield,
"Throw from wx&Yield()\tCtrl-Y");
menuFile->Append(Except_ThrowFromIdle,
"Throw from &idle handler\tCtrl-J");
menuFile->Append(Except_Crash, "&Crash\tCtrl-C");
menuFile->Append(Except_Trap, "&Trap\tCtrl-T",
"Break into the debugger (if one is running)");
@@ -544,6 +563,12 @@ void MyFrame::OnThrowFromYield(wxCommandEvent& WXUNUSED(event))
#endif // wxUSE_UIACTIONSIMULATOR/!wxUSE_UIACTIONSIMULATOR
}
void MyFrame::OnThrowFromIdle(wxCommandEvent& WXUNUSED(event))
{
auto& app = wxGetApp();
app.Bind(wxEVT_IDLE, &MyApp::OnIdle, &app);
}
void MyFrame::OnCrash(wxCommandEvent& WXUNUSED(event))
{
DoCrash();