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PreCreateWindow does not get called from CDialog

Hi all,
  I have a dialog that I want to dynamically change the size of based on the size of a bitmap. I tried overriding PreCreateWindow, but that does not seem to get called for dialogs. So my question is: how will I do it if I can't use PreCreateWindow?

J
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Joe_Banks_217
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Joe_Banks_217
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3 Solutions
 
mahesh1402Commented:
>> how will I do it if I can't use PreCreateWindow

Simply Put your 'PreCreateWindow' code in your dialog's InitDialog() function. OR better option you  put that code in your dialog's OnCreate() function.

So you may use CDialog::OnCreate() or CDialog::InitDialog().

-MAHESH
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ramesh_hyd_apCommented:
Hi joe,
         
          You can use setwindowpos()  in the InitDialog() function of your dialog.

          SetWindowPos ( NULL , 0 , 0 , bitmap_width , bitmap_height , SWP_NOZORDER);

Thanks,
Ramesh.
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Joe_Banks_217Author Commented:
Mahesh,
  How do I access the "CREATESTRUCT" that gets automatically passed to PreCreateWindow from InitDialog()??
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mahesh1402Commented:
>>How do I access the "CREATESTRUCT" that gets automatically passed to PreCreateWindow from InitDialog()??

You can retrieve all the parameters of CREATESTRUCT by individual functions.. for Window Size you may retrieve that by GetWindowRect(), to get parent window you may call GetParent()..etc So you dont need CREATESTRUCT at all just call this function to get needed parameters.

As I suggested you may better use OnCreate() from which you can access CREATESTRUCT.
http://msdn2.microsoft.com/en-us/library/384x0633.aspx <==

-MAHESH
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mahesh1402Commented:
NOTE You may also use CWnd::OnNcCreate() The framework calls this member function prior to the WM_CREATE message when the CWnd object is first created in which you may also access CREATESTRUCT.
afx_msg BOOL OnNcCreate( LPCREATESTRUCT lpCreateStruct );
http://msdn2.microsoft.com/en-us/library/ytd5cczf.aspx <==

-MAHESH

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AndyAinscowFreelance programmer / ConsultantCommented:
As mahesh says use the OnInitDialog.

BOOL CMyDlg::OnInitDialog()
{
      CDialog::OnInitDialog();

        CRect rc(0, 0, 850, 400);  //bitmap width 850 and height 400
      CalcWindowRect(&rc);
      SetWindowPos(NULL, 0, 0, rc.Width(), rc.Height(), SWP_NOMOVE | SWP_NOZORDER);
      //CenterWindow();   //If you want to center the dialog


CalcWindowRect:
Call this member function to compute the required size of the window rectangle based on the desired client-rectangle size.

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ramesh_hyd_apCommented:
Hi Andy,

I think i have suggested to use SetWindowPos,  but you are descrbing as  "As mahesh says"  ?

Thanks,
Ramesh.
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AndyAinscowFreelance programmer / ConsultantCommented:
apologies - I meant the OnInitDialog which mahesh had said first.

Note, however, you need to adjust the total size to cope with borders.  Just using the bitmap width and height will not give a satisfactory result (unless the dialog is without border / caption).
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ramesh_hyd_apCommented:
Hi Andy,

Off course you are right, but i did not get any feedback/concern from joe for this solution, otherwise i would have given work around for this.

Joe any comments on this?

Thanks,
Ramesh.
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mahesh1402Commented:
Dont know which params joe want to access from CREATESTRUCT but as said you may put CalcWindowRect() GetWindowRect() on InitDialog if deal with positions or if want to access CREATESTRUCT then may use OnCreate() or OnNcCreate().

-MAHESH
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Joe_Banks_217Author Commented:
hey guys, i appreciate the comments. thank you. andy, yes, the dialog has no border.
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