wxButton with SetDefault() no longer responds to enter on a frame

Question

I have an application that was originally working with wx2.8 and has since been ported to wx3.0. This application's frame has a "Connect" button on which SetDefault() gets called when the button is created. Under wx2.8, this button would generate a clicked event when the enter key was recognised. Under wx3.0, this no longer seems to function. I have been attempting to work around this using hot keys but they present their own set of problems with modal dialogues when the enter key is defined as a hot key. The hot key event apparently will not deliver the key event even if it was skipped. Does anyone have any suggestions or work arounds?

Last Friday, I thought that this might have something to do with initialising the frame with the wxWANTS_CHARS style and, indeed, this is the case. I have also found that the problem occurs if the button is not initialised with a wxID_OK ID. The following code demonstrates the issue:

#include "wx/wx.h"


class MyFrame: public wxFrame
{
private:
   wxTextCtrl *text_status;
   int click_count;

public:
   MyFrame():
      wxFrame(
         0,
         wxID_ANY,
         "SetDefault",
         wxDefaultPosition,
         wxDefaultSize,
         wxDEFAULT_FRAME_STYLE | wxCLIP_CHILDREN),
      click_count(0)
   {
      wxPanel *panel(new wxPanel(this));
      wxSizer *sizer(new wxBoxSizer(wxVERTICAL));
      wxButton *button;


      text_status = new wxTextCtrl(panel, wxID_ANY);
      sizer->Add(text_status, 0, wxALL, 10);
      button = new wxButton(panel, wxID_HIGHEST + 1, "Increment");
      sizer->Add(button, 0, wxALL, 10);
      button->SetDefault();
      panel->SetSizerAndFit(sizer);
   }

   void on_increment(wxCommandEvent &event)
   {
      wxString content;
      ++click_count;
      content.Printf("%d", click_count);
      text_status->SetValue(content);
   }

   DECLARE_EVENT_TABLE()
};


BEGIN_EVENT_TABLE(MyFrame, wxFrame)
EVT_BUTTON(wxID_OK, MyFrame::on_increment)
END_EVENT_TABLE()


class MyApp: public wxApp
{
   virtual bool OnInit()
   {
      MyFrame *frame(new MyFrame);
      frame->Show(true);
      SetExitOnFrameDelete(true);
      return true;
   }
};


IMPLEMENT_APP(MyApp)

Answer 1

I found a work around of specifying an ID of wxID_OK to the default button.

Answer 2

If the default button doesn't react to Enter key presses, it looks like a bug in wxWidgets and you should report it in the usual way. Please try to provide a simple example reproducing the problem, ideally as a patch to a sample, if you do this because this definitely does work in normal/most cases.