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Event Table problem(wxWidgets)

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Event Table problem(wxWidgets)

 
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  #1
Apr 7th, 2009
When I declare an event table in a class a.k.a DECLARE_EVENT_TABLE(); then try to compile, i always get this error:
[Linker Error] undefined reference to `vtable for Utility' (utility being my class) What does this mean and how do I fix it? All research on this has turned up dead ends =(. Thanks
Last edited by clutchkiller; Apr 7th, 2009 at 11:38 pm.
>That confuses me =(
Get used to it. Good programmers are in a constant state of confusion.
>Looks like i have some quasi specifics to investigate! Up Up And AWAY!
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Re: Event Table problem(wxWidgets)

 
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  #2
Apr 8th, 2009
Presumably something needs to be declared as virtual in Utility. Without code, it's hard to say exactly what.
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Re: Event Table problem(wxWidgets)

 
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  #3
Apr 8th, 2009
Here is my Header file:

c++ Syntax (Toggle Plain Text) 
  1. #ifndef UTILITY_H
  2. #define UTILITY_H
  3.  
  4. #include <wx/wx.h>
  5.  
  6. enum
  7. {
  8.     btn_send = 100,
  9.     btn_main,
  10.     im_box_rec,
  11.     im_box_ent,
  12.     im_box_con,
  13.     im_box_addip,
  14.     im_combo
  15. };
  16.  
  17. class Utility : public wxFrame
  18. {
  19.     public:
  20.         Utility(const wxString &title, const wxPoint &pos, const wxSize &size);
  21.  
  22.     private:
  23.        DECLARE_EVENT_TABLE();
  24.  
  25. };
  26.  
  27. #endif

And here is my .cpp:

c++ Syntax (Toggle Plain Text) 
  1. #include "Utility.h"
  2. #include <wx/wx.h>
  3.  
  4. Utility::Utility(const wxString &title, const wxPoint &pos, const wxSize &size) : wxFrame(NULL, -1, title, pos, size)
  5. {
  6.     /////////////////////////MENU////////////////////////////////
  7.  
  8.  
  9.     wxMenu *util_list = new wxMenu;
  10.  
  11.     util_list -> Append(-1, _T("&"));
  12.     util_list -> Append(-1, _T("&"));
  13.     util_list -> Append(-1, _T("&"));
  14.     util_list -> AppendSeparator();
  15.     util_list -> Append(-1, _T("&About"));
  16.     util_list -> AppendSeparator();
  17.     util_list -> Append(-1, _T("E&xit"));
  18.  
  19.     wxMenuBar *MENU = new wxMenuBar;
  20.  
  21.     MENU -> Append(util_list, _T("&Utilities"));
  22.  
  23.     SetMenuBar(MENU);
  24.  
  25.     ///////////////////////PANELS/////////////////////////////
  26.  
  27.     wxPanel *mainPanel = new wxPanel(this, -1, wxPoint(0,0), wxSize(1000,600), wxBORDER_STATIC);
  28.     wxPanel *sideWin = new wxPanel(mainPanel, -1, wxPoint(800,0), wxSize(200,500), wxBORDER_STATIC);
  29.  
  30.     wxTextCtrl *imBox_rec = new wxTextCtrl(mainPanel, im_box_rec, _T("Recieve text..."), wxPoint(0, 50), wxSize(400,200));
  31.     wxTextCtrl *imBox_ent = new wxTextCtrl(mainPanel, im_box_ent, _T("Enter text..."), wxPoint(0,300), wxSize(400,100));
  32.  
  33.     wxComboBox *imCombo = new wxComboBox(mainPanel, im_combo, _T("IP List"), wxPoint(100, 25), wxSize(152, 100));
  34.  
  35.     wxButton *saveTran = new wxButton(mainPanel, -1, _T("Save Transcript"), wxPoint(0, 252), wxSize(400, 20));
  36.     wxButton *addipButton = new wxButton(mainPanel, im_box_addip, _T("Add IP"), wxPoint(100,0), wxSize(150,25));
  37.     wxButton *conButton = new wxButton(mainPanel, im_box_con, _T("Connect to IP"), wxPoint(0,0), wxSize(100,50));
  38.     wxButton *mainButton = new wxButton(mainPanel, btn_main, _T("entr"), wxPoint(300,60), wxSize(100,100));
  39.     wxButton *sendButton = new wxButton(mainPanel, btn_send, _T("Send"), wxPoint(0,400), wxSize(400,50));
  40.  
  41.     wxBoxSizer *mainSizer = new wxBoxSizer(wxVERTICAL);
  42.  
  43.     mainSizer -> Add(imBox_rec, 0, wxCENTER, 0);
  44.     mainSizer -> Add(imBox_ent, 0, wxCENTER, 0);
  45.     mainSizer -> Add(mainButton, 0, wxCENTER, 0);
  46.     mainSizer -> Add(sendButton, 0, wxCENTER, 0);
  47.  
  48.     //mainPanel -> SetAutoLayout(true);
  49.     //mainPanel -> SetSizer(mainSizer);
  50.  
  51. }
>That confuses me =(
Get used to it. Good programmers are in a constant state of confusion.
>Looks like i have some quasi specifics to investigate! Up Up And AWAY!
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Re: Event Table problem(wxWidgets)

 
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  #4
Apr 8th, 2009
I don't know wxWidgets, so I'm just guessing here. Try making DECLARE_EVENT_TABLE(); public instead of private.

If that doesn't work, try putting this in your code:
C++ Syntax (Toggle Plain Text) 
  1. BEGIN_EVENT_TABLE(MyFrame, wxFrame)
  2. END_EVENT_TABLE()

Or, if you aren't goint to have any events, remove DECLARE_EVENT_TABLE(); altogether.
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Re: Event Table problem(wxWidgets)

 
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  #5
Apr 8th, 2009
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Originally Posted by nucleon View Post
Try making DECLARE_EVENT_TABLE(); public instead of private.
Nah, don't do that, it's good as is. However this:

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Originally Posted by nucleon View Post
try putting this in your code:
C++ Syntax (Toggle Plain Text) 
  1. BEGIN_EVENT_TABLE(MyFrame, wxFrame)
  2. END_EVENT_TABLE()

Or, if you aren't goint to have any events, remove DECLARE_EVENT_TABLE(); altogether.
is indeed the answer to your problem.
Last edited by niek_e; Apr 8th, 2009 at 4:32 am.
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Re: Event Table problem(wxWidgets)

 
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  #6
Apr 8th, 2009
Thanks, that solved it =D
>That confuses me =(
Get used to it. Good programmers are in a constant state of confusion.
>Looks like i have some quasi specifics to investigate! Up Up And AWAY!
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