Msgbox centered on the window

[Marco Turco]

Hi all,
I need to center the msgbox (example: Msginfo, MsgNoYes etc.) automatically on my windows instead of the screen.
I tried SetCenterOnParent(.t.) but this runs only for dialogs.

Any solution ? Thanks in advance

[José Luis Sánchez]

Use this code:

Code: Select all  Expand view

  ACTIVATE DIALOG oDlgInfo ;
      ON INIT oDlgInfo:Center( oApp():oWndMain )

where oDlgInfo is your dialog and oApp():oWndMain the main window of the application.

Regards,

[Marco Turco]

Hi José,
your solution runs only with dialogs not with the msgbox functions.
The only running solution I have found is to make new function dialogs based for the msgbox functions.

[José Luis Sánchez]

Marco,
I've the msgbox functions redefined based on dialogs, and for this runs ok in my programs.
Regards,

[Massimo Linossi]

Hello Josè.
I have the same problem of Marco. Is possible to see your functions ?
Thanks a lot.
Massimo

[Antonio Linares]

Here there is some code that we could try to adapt to FWH:

http://vbnet.mvps.org/index.html?code/hooks/messageboxhookcentre.htm

[Massimo Linossi]

It would be great.
Thanks Antonio.

[Antonio Linares]

This is already working

Code: Select all  Expand view

#pragma BEGINDUMP

#include <windows.h>
#include <hbapi.h>

LRESULT CALLBACK MsgBoxHookProc( int nCode, WPARAM wParam, LPARAM lParam )
{
   if( nCode == HCBT_ACTIVATE )
   {
      HWND hWndMsgBox = wParam;
     
      SetWindowText( hWndMsgBox, "It works" );     
   }       
    
   return 0; // allow normal processing
}

HINSTANCE GetInstance( void );

HB_FUNC( CENTERMSGS )
{
   hb_retptr( ( void * ) SetWindowsHookEx( WH_CBT,  
                                MsgBoxHookProc, GetInstance(),
                                GetCurrentThreadId() ) );
}

#pragma ENDDUMP
 

Now we need to find a way to locate the active window. I guess that the idea is to set this for the entire app.

Here you have an example:

Code: Select all  Expand view

#include "FiveWin.ch"

//----------------------------------------------------------------------------//

function Main()

   local oWnd

   DEFINE WINDOW oWnd
   
   CenterMsgs()
    
   ACTIVATE WINDOW oWnd ;
      ON CLICK  MsgInfo( "Hello world" )
   
return nil

[Antonio Linares]

In this version we are already able to move the Msg... window:

Code: Select all  Expand view

static HHOOK hHook = NULL;

LRESULT CALLBACK MsgBoxHookProc( int nCode, WPARAM wParam, LPARAM lParam )
{
   if( nCode < 0 )  // do not process message
        return CallNextHookEx( hHook, nCode, wParam, lParam );

   if( nCode == HCBT_CREATEWND )
   {
      HWND hWndMsgBox = wParam; 
      char cn[ 200 ];
           
      GetClassName( hWndMsgBox, cn, 199 );     

      if( cn[ 0 ] == '#' &&
          cn[ 1 ] == '3' &&
          cn[ 2 ] == '2' &&
          cn[ 3 ] == '7' &&
          cn[ 4 ] == '7' &&
          cn[ 5 ] == '0' &&
          cn[ 6 ] == 0 )
      {    
         ( ( CBT_CREATEWND * ) lParam )->lpcs->x = 50;
         ( ( CBT_CREATEWND * ) lParam )->lpcs->y = 50;
      }            
   }       
   
   return 0; // allow normal processing
}

HINSTANCE GetInstance( void );

HB_FUNC( CENTERMSGS )
{
   hHook = SetWindowsHookEx( WH_CBT,  
                             MsgBoxHookProc, GetInstance(),
                             GetCurrentThreadId() );
}
 

Still we need to get the handle of the parent window

[Antonio Linares]

Ok, this one seems to be working fine

Still we need to implement a function to remove the hook.

Code: Select all  Expand view

static HHOOK hHook = NULL;

static void CenterWindowOnParent( HWND hChildWnd, LPARAM lParam )
{
   HWND hParent = GetParent( hChildWnd );
   RECT rcChild, rcParent;
   int cxChild, cyChild, cxParent, cyParent;

   GetWindowRect( hChildWnd, &rcChild );
   GetWindowRect( hParent, &rcParent );

   cxChild = rcChild.right - rcChild.left;
   cyChild = rcChild.bottom - rcChild.top;
   cxParent = rcParent.right - rcParent.left;
   cyParent = rcParent.bottom - rcParent.top;
   
   SetWindowPos( hChildWnd, NULL,
               rcParent.left + ( cxParent - cxChild ) / 2,
                 rcParent.top + ( cyParent - cyChild ) / 2, 0, 0, 0x15 );      
}

LRESULT CALLBACK MsgBoxHookProc( int nCode, WPARAM wParam, LPARAM lParam )
{
   if( nCode < 0 )  // do not process message
        return CallNextHookEx( hHook, nCode, wParam, lParam );

   if( nCode == HCBT_ACTIVATE )
   {
      HWND hWndMsgBox = ( HWND ) wParam;   
      char cn[ 200 ];
           
      GetClassName( hWndMsgBox, cn, 199 );     

      if( cn[ 0 ] == '#' &&
          cn[ 1 ] == '3' &&
          cn[ 2 ] == '2' &&
          cn[ 3 ] == '7' &&
          cn[ 4 ] == '7' &&
          cn[ 5 ] == '0' &&
          cn[ 6 ] == 0 )
         CenterWindowOnParent( hWndMsgBox, lParam );           
   }       
    
   return 0; // allow normal processing
}

HINSTANCE GetInstance( void );

HB_FUNC( CENTERMSGS )
{
   hHook = SetWindowsHookEx( WH_CBT,  
                             MsgBoxHookProc, GetInstance(),
                             GetCurrentThreadId() );
}
 

[dutch]

Dear Antonio,

The theme (Dialog, MsgBox) is so nice. Is this Win8 theme or standard screen? If so, can we make it the screen on other Windows version such as Win7 or WinXP.

Ok, this one seems to be working fine

Still we need to implement a function to remove the hook.

Code: Select all  Expand view

static HHOOK hHook = NULL;

static void CenterWindowOnParent( HWND hChildWnd, LPARAM lParam )
{
   HWND hParent = GetParent( hChildWnd );
   RECT rcChild, rcParent;
   int cxChild, cyChild, cxParent, cyParent;

   GetWindowRect( hChildWnd, &rcChild );
   GetWindowRect( hParent, &rcParent );

   cxChild = rcChild.right - rcChild.left;
   cyChild = rcChild.bottom - rcChild.top;
   cxParent = rcParent.right - rcParent.left;
   cyParent = rcParent.bottom - rcParent.top;
   
   SetWindowPos( hChildWnd, NULL,
               rcParent.left + ( cxParent - cxChild ) / 2,
                 rcParent.top + ( cyParent - cyChild ) / 2, 0, 0, 0x15 );      
}

LRESULT CALLBACK MsgBoxHookProc( int nCode, WPARAM wParam, LPARAM lParam )
{
   if( nCode < 0 )  // do not process message
        return CallNextHookEx( hHook, nCode, wParam, lParam );

   if( nCode == HCBT_ACTIVATE )
   {
      HWND hWndMsgBox = ( HWND ) wParam;   
      char cn[ 200 ];
           
      GetClassName( hWndMsgBox, cn, 199 );     

      if( cn[ 0 ] == '#' &&
          cn[ 1 ] == '3' &&
          cn[ 2 ] == '2' &&
          cn[ 3 ] == '7' &&
          cn[ 4 ] == '7' &&
          cn[ 5 ] == '0' &&
          cn[ 6 ] == 0 )
         CenterWindowOnParent( hWndMsgBox, lParam );           
   }       
    
   return 0; // allow normal processing
}

HINSTANCE GetInstance( void );

HB_FUNC( CENTERMSGS )
{
   hHook = SetWindowsHookEx( WH_CBT,  
                             MsgBoxHookProc, GetInstance(),
                             GetCurrentThreadId() );
}
 

[ukoenig]

I needed a solution, to display different messages
on any defined position and with any style ( color,brush, gradient, font, icon .... )

the sample shows a message displayed on left upper corner on button-action



MYMSGBOX( .T., { 100, 50, 100, 300 }, ; // .F. = center
"< " + ALLTRIM(STR( nMenge1 )) + " > Patient(en) mit" + CRLF + ;
"< " + ALLTRIM(STR( nMenge2 )) + " > Verordnungen geprüft " + CRLF + ;
" " + CRLF + ;
"< " + ALLTRIM(STR( nMenge3 )) + " > Fehler gefunden", ;
{"&Weiter"}, "VERORDNUNGS-PRÜFUNG", "A", 1, ;
{{ nDColorB, nDColorB, nDColorB, nDColorB }}, , , , ;
oFontSys, aVal[27], c_Pfad1 + "Info1.bmp" )

YES / NO centered



DO WHILE nOpt = 0
nOpt := MYMSGBOX( .F., { 10, 10, 100, 300 }, ;
"Wollen Sie den Monat : " + cNach + CRLF + ;
"neu aufbauen ?", ;
{"&Aufbau","A&bbruch"}, ;
"MONATSÜBERNAHME", ;
"O", 1, ;
{{ nDColorB, nDColorB, nDColorB, nDColorB }}, , , , ;
oFontSys, aVal[27], c_Pfad1 + "Sort.bmp" )
ENDDO

IF nOpt = 1
....
....

best regards
Uwe

[Antonio Linares]

Dutch,

I am using Windows 10

Dear Antonio,

The theme (Dialog, MsgBox) is so nice. Is this Win8 theme or standard screen? If so, can we make it the screen on other Windows version such as Win7 or WinXP.

Ok, this one seems to be working fine

Still we need to implement a function to remove the hook.

Code: Select all  Expand view

static HHOOK hHook = NULL;

static void CenterWindowOnParent( HWND hChildWnd, LPARAM lParam )
{
   HWND hParent = GetParent( hChildWnd );
   RECT rcChild, rcParent;
   int cxChild, cyChild, cxParent, cyParent;

   GetWindowRect( hChildWnd, &rcChild );
   GetWindowRect( hParent, &rcParent );

   cxChild = rcChild.right - rcChild.left;
   cyChild = rcChild.bottom - rcChild.top;
   cxParent = rcParent.right - rcParent.left;
   cyParent = rcParent.bottom - rcParent.top;
   
   SetWindowPos( hChildWnd, NULL,
               rcParent.left + ( cxParent - cxChild ) / 2,
                 rcParent.top + ( cyParent - cyChild ) / 2, 0, 0, 0x15 );      
}

LRESULT CALLBACK MsgBoxHookProc( int nCode, WPARAM wParam, LPARAM lParam )
{
   if( nCode < 0 )  // do not process message
        return CallNextHookEx( hHook, nCode, wParam, lParam );

   if( nCode == HCBT_ACTIVATE )
   {
      HWND hWndMsgBox = ( HWND ) wParam;   
      char cn[ 200 ];
           
      GetClassName( hWndMsgBox, cn, 199 );     

      if( cn[ 0 ] == '#' &&
          cn[ 1 ] == '3' &&
          cn[ 2 ] == '2' &&
          cn[ 3 ] == '7' &&
          cn[ 4 ] == '7' &&
          cn[ 5 ] == '0' &&
          cn[ 6 ] == 0 )
         CenterWindowOnParent( hWndMsgBox, lParam );           
   }       
    
   return 0; // allow normal processing
}

HINSTANCE GetInstance( void );

HB_FUNC( CENTERMSGS )
{
   hHook = SetWindowsHookEx( WH_CBT,  
                             MsgBoxHookProc, GetInstance(),
                             GetCurrentThreadId() );
}
 

[Horizon]

Hi,

Should we call CenterMsgs() function just in main window or should we call before every MsgInfo function?

[Antonio Linares]

Hakan,

Just once at the beginning of your app.

And we should remove the hook before the app quits