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Setting the initial position of a dialog-based application

Posted by Mihai Filimon on April 19th, 1999
void CAppDlg::OnWindowPosChanging(WINDOWPOS FAR* lpwndpos) { if (lpwndpos->cx = -1) if (lpwndpos->cy = -1) // is init time { lpwndpos->x = 0; // change here if you want to move left or right the window. lpwndpos->y = 0; // change here if you want to move top or bottom the window. } CDialog::OnWindowPosChanging(lpwndpos); }

Explanation

After CreateDialogIndirect, the MFC call CenterWindow. The last line of this function call SetWindowPos with position of window, and with -1, -1, as width and height of window. So the WM_WINDOWPOSCHANGING is obviously.

Date Last Updated: April 19, 1999

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Comments

  • Fixed Position Dialog?

    Posted by Legacy on 09/25/2003 12:00am

    Originally posted by: Jon Ha 

    Hey Xiaolong Li (or anybody who can answer),


    What is the actual code that can be used to fix the position of a dialog box?  I do not want the dialog to be movable, even when the mouse drags the top title bar of the dialog.  is this possible??


    thanks very much!


    Jon

    Reply

  • Works Great

    Posted by Legacy on 04/09/2003 12:00am

    Originally posted by: Trent

    I added the code to my program and it works well.

    Thanks a lot

    Reply

  • Modeless

    Posted by Legacy on 12/25/2002 12:00am

    Originally posted by: Dep

    In the modeless option this solution doesn't work...

    Reply

  • Hiding a modal dialog on startup

    Posted by Legacy on 04/30/2002 12:00am

    Originally posted by: Bosyotik 

    You can hide a modal dialog on startup like this:


    1) Add a BOOL member variable on your CDialog class and intialize it to TRUE


    class CYourDialod: public CDialog

    {

    // ...

     private:

       BOOL m_bHideOnStart;

    }


    CYourDialog::CYourDialog(CWnd* pParent /*=NULL*/)

            : CDialog(CUpgraderDlg::IDD, pParent), m_bHideOnStart(TRUE);

    {

    //...

    }


    2) Handle WM_WINDOWPOSCHANGING message


    void CYourDialog::OnWindowPosChanging(WINDOWPOS* lpwndpos)

    {

      CDialog::OnWindowPosChanging(lpwndpos);

      if((lpwndpos->flags & SWP_SHOWWINDOW) && m_bHideOnStart){

    		lpwndpos->flags &= ~SWP_SHOWWINDOW;

    		m_bHideOnStart=FALSE;

      }

    }

    Reply

  • Setting position

    Posted by Legacy on 10/17/2000 12:00am

    Originally posted by: Wayne Irons

    Setting the initial position of the dialog is working fine, but how can I also set the initial size? It seems that even if I set lpwndpos->cx and ->cy, they're ignored because SetWindowPos was called with SWP_NOSIZE as a flag...

    Reply

  • How to begin Application with a maximised window size?

    Posted by Legacy on 05/17/2000 12:00am

    Originally posted by: Manish 

    If u have developed a dialog based or any SDI/MDI application ,

    what should be done in order to open it in maximised window size..??

    my addy ,Logmanish@yahoo.com

    Reply

  • Use DialogBox's properties if the position is fixed

    Posted by Legacy on 04/20/1999 12:00am

    Originally posted by: Xiaolong Li

    Easier way:

    1. Select your DialogBox from resource, get "Properties"
    2. "General" Tab: fill "X Pos" and "Y Pos"
    3. "More Styles" Tab: check "Absolute Align".

    Reply

  • SetWindowPos() works

    Posted by Legacy on 04/19/1999 12:00am

    Originally posted by: Joselito Santana 

    Sure you can use SetWindowPos().  You can call it in OnInitDialog. All you have to do is


    SetWindowPos(NULL, X, Y, NULL, NULL, SWP_NOSIZE | 

    		 SWP_NOZORDER | SWP_SHOWWINDOW);


    where X and Y are values in pixels.

    Reply
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