Waiting for a RETURN key in a TEdit.

gaohong,
The TEdit object is in a TDialog. Do I add the WM_KEYDOWN event to the existing response table, or does the TEdit get it's own response table? I have tried to add it to the TDialog response table but it doesn't seem to work. Thanks for your help.
Regards, Gerry

look here, it is in TEdit, derive your special editor

DEFINE_RESPONSE_TABLE1(RetEdit, TEdit)
          EV_WM_KEYDOWN,
END_RESPONSE_TABLE;

good luck

gaohong

I have done what you said and still receive the following errors:

Error:  FUNC.H(140,3):Ambiguous override of virtual base member 'TWindow::GetClassName()': 'TEdit::GetClassName()'
Error:  FUNC.H(140,3):Ambiguous override of virtual base member 'TWindow::GetClassName()': 'TDialog::GetClassName()'

To restate my problem. I have a TDialog with a TEdit control (one line of text allowed) and I would like to perform a function when RETURN is hit. I have two seperate response tables DECLARE_RESPONSE_TABLE1(EditObjs, TEdit) and DECLARE_RESPONSE_TABLE1(FuncDialog,TDialog) I also have two classes called EditObjs with a function EvKeyDown(UINT,UINT,UINT) as a member and another class FuncDialog. My EvKeyDown() function uses a variable 'X' in my FuncDialog:TDialog class.
How can I receive messages from both TEdit and TDialog and use variables shared by both?? Am I missing something? See below.

DEFINE_RESPONSE_TABLE1(FuncDialog,TDialog)
 EV_EN_CHANGE(IDC_FREQUENCY,EditSineWave),
END_RESPONSE_TABLE;
DECLARE_RESPONSE_TABLE(Freq);
DEFINE_RESPONSE_TABLE1(Freq,TEdit)
 EV_WM_KEYDOWN,
END_RESPONSE_TABLE;

class EditObjs:TEdit
{
  protected:
  void EvKeyDown(UINT,UINT,UINT); <-- uses int X
}
class FuncDialog: TDialog
{
 other funcs
 int X;
}
end.

I have done what you said and still receive the following errors:

Error:  FUNC.H(140,3):Ambiguous override of virtual base member 'TWindow::GetClassName()': 'TEdit::GetClassName()'
Error:  FUNC.H(140,3):Ambiguous override of virtual base member 'TWindow::GetClassName()': 'TDialog::GetClassName()'

To restate my problem. I have a TDialog with a TEdit control (one line of text allowed) and I would like to perform a function when RETURN is hit. I have two seperate response tables DECLARE_RESPONSE_TABLE1(EditObjs, TEdit) and DECLARE_RESPONSE_TABLE1(FuncDialog,TDialog) I also have two classes called EditObjs with a function EvKeyDown(UINT,UINT,UINT) as a member and another class FuncDialog. My EvKeyDown() function uses a variable 'X' in my FuncDialog:TDialog class.
How can I receive messages from both TEdit and TDialog and use variables shared by both?? Am I missing something? See below.

DEFINE_RESPONSE_TABLE1(FuncDialog,TDialog)
 EV_EN_CHANGE(IDC_FREQUENCY,EditSineWave),
END_RESPONSE_TABLE;
DECLARE_RESPONSE_TABLE(EditObjs);
DEFINE_RESPONSE_TABLE1(EditObjs,TEdit)
 EV_WM_KEYDOWN,
END_RESPONSE_TABLE;

class EditObjs:TEdit
{
  protected:
  void EvKeyDown(UINT,UINT,UINT); <-- uses int X
}
class FuncDialog: TDialog
{
 other funcs
 int X;
}
end.

I did see the place you handle WM_KEYDOWN in your editor

copy following to a .h file
#ifndef RETEDIT.H
#define RETEDIT.H

#include <owl\edit.h>

#pragma hdrstop

class RetEdit : virtual public TEdit
{
public:
      RetEdit::RetEdit(TWindow*        parent,
                         int             id,
                         const char far* text,
                         int x, int y, int w, int h,
                      uint            textLen = 0,
                      bool            multiline = false,
                      TModule*        module = 0);
      ~RetEdit() {;}

       void EvKeyDown(uint key, uint repeatCount, uint flags);

private: // hidden to prevent accidental copying or assignment
       RetEdit(const RetEdit&);
       RetEdit& operator =(const RetEdit&);

       DECLARE_RESPONSE_TABLE(RetEdit);
};

#endif


then copy following to .cpp file

#include above .h file

DEFINE_RESPONSE_TABLE1(RetEdit, TEdit)
  EV_WM_KEYDOWN,
END_RESPONSE_TABLE;

RetEdit::RetEdit(TWindow*        parent,
                   int             id,
                   const char far* text,
                   int x, int y, int w, int h,
                   uint            textLen,
                   bool            multiline,
                   TModule*        module)
        :TEdit(parent, id, text, x, y, w, h, textLen, multiline, module)
      {
      }

void RetEdit::EvKeyDown(uint key, uint repeatCount, uint flags)
      {
        if(key == VK_TAB  || key == VK_RETURN ||             //left, right
           key == VK_UP   || key == VK_DOWN   ||             //up, down
           key == VK_HOME || key == VK_END    ||
           key == VK_NEXT || key == VK_PRIOR)
        {
            //do what you want, or post user message to
                //parent (your dialog) if you prefer to
                //handle it in your dialog
        }
      else
            TEdit::EvKeyDown(key, repeatCount, flags);
        }

If editor is from resource, make sure select check want return,
and use appropriate form of TEdit() constrcutor

good luck
gaohong xie

Gaohong, I was able to take your answers and incorporate them into my program without errors, but I still cannot intercept the keystrokes from the TEdit control. Do you have any simple example code you can upload? I am using the resource workshop and using the correct version of TEdit, but it doesn't seem to connect to the control properly. See below:

.h file
class RetEdit: virtual public TEdit
{
   public:
   RetEdit::RetEdit(TWindow* parent, int id, uint                  textlen,TModule* module);
   ~RetEdit();
   void EvKeyDown(uint, uint,uint);
   DECLARE_RESPONSE_TABLE(RetEdit);
};
;-----------------------------;
.cpp file

DEFINE_RESPONSE_TABLE1(RetEdit,TEdit)
 EV_WM_KEYDOWN,
END_RESPONSE_TABLE;

RetEdit::RetEdit(TWindow* parent, int id=IDC_FREQUENCY,uint textlen=8,TModule* module=0):TEdit(parent,id,textlen,module)
{
      
}
Thanks for your help.
Regards, Gerry

Gaohong, I was finally successful in intercepting keyboard inputs from the TEdit control.  Disregard my last comment. Thanks for all your help.

Best Regards,
Gerald Capwell