Class to Auto-Position Controls on Window Resize

Class to Auto-Position Controls on Window Resize
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Paul Wendt () November 3, 2000

Introduction

Have you ever wanted to resize a window but NOT have to deal with all of that annoying control-repositioning? What a hassle! Here is an easy-to-use class that should provide a good foundation for anyone wishing to easily reposition controls when a user resizes the parent window.

Usage

In order to use this class, simply follow these steps:

1. Create a CControlPos member variable in your CDialog (used in example) or CView derived class.

   class CYourDialog : public CDialog
   {
   ...
    CControlPos m_cControlPos;
   

2. In the OnInitDialog (or InitialUpdate) function, set the object's parent window

   BOOL CYourDialog::OnInitDialog()
   ...
    m_cControlPos.SetParent(this);
   ...
   

3. After the call to CControlPos::SetParent, Add the controls you want to resize.

   m_cControlPos.AddControl(IDOK, CP_MOVE_HORIZONTAL);
   m_cControlPos.AddControl(IDCANCEL, CP_MOVE_HORIZONTAL);
   

4. Finally, on your WM_SIZE handler, call the object's MoveControls to specify runtime behaviour. move all of the controls. Controls can be moved horizontally and vertically and resized horizontally and vertically.

   void CYourDialog::OnSize(UINT nType, int cx, int cy)
   {
    CDialog::OnSize(nType, cx, cy);
   
    m_cControlPos.MoveControls();
   }
   

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