ResizableDialog.cpp

// ResizableDialog.cpp : implementation file
//
//
// Copyright (C) 2000-2002 by Paolo Messina
// (http://www.geocities.com/ppescher - [email protected])
//
// The contents of this file are subject to the Artistic License (the "License").
// You may not use this file except in compliance with the License. 
// You may obtain a copy of the License at:
// http://www.opensource.org/licenses/artistic-license.html
//
// If you find this code useful, credits would be nice!
//

#include "stdafx.h"
#include "ResizableDialog.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

// CResizableDialog

inline void CResizableDialog::PrivateConstruct()
{
        m_bEnableSaveRestore = FALSE;
        m_dwGripTempState = 1;
}

CResizableDialog::CResizableDialog()
{
        PrivateConstruct();
}

CResizableDialog::CResizableDialog(UINT nIDTemplate, CWnd* pParentWnd)
        : CCmdUIDialog(nIDTemplate, pParentWnd)
{
        PrivateConstruct();
}

CResizableDialog::CResizableDialog(LPCTSTR lpszTemplateName, CWnd* pParentWnd)
        : CCmdUIDialog(lpszTemplateName, pParentWnd)
{
        PrivateConstruct();
}

CResizableDialog::~CResizableDialog()
{
}


BEGIN_MESSAGE_MAP(CResizableDialog, CCmdUIDialog)
        //{{AFX_MSG_MAP(CResizableDialog)
        ON_WM_GETMINMAXINFO()
        ON_WM_SIZE()
        ON_WM_DESTROY()
        ON_WM_CREATE()
        ON_WM_ERASEBKGND()
        //}}AFX_MSG_MAP
END_MESSAGE_MAP()


// CResizableDialog message handlers

int CResizableDialog::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
        if (__super::OnCreate(lpCreateStruct) == -1)
                return -1;

        // child dialogs don't want resizable border or size grip,
        // nor they can handle the min/max size constraints
        BOOL bChild = GetStyle() & WS_CHILD;

        if (!bChild)
        {
                // keep client area
                CRect rect;
                GetClientRect(&rect);
                // set resizable style
                ModifyStyle(DS_MODALFRAME, WS_POPUP | WS_THICKFRAME);
                // adjust size to reflect new style
                ::AdjustWindowRectEx(&rect, GetStyle(),
                        ::IsMenu(GetMenu()->GetSafeHmenu()), GetExStyle());
                SetWindowPos(NULL, 0, 0, rect.Width(), rect.Height(), SWP_FRAMECHANGED|
                        SWP_NOMOVE|SWP_NOZORDER|SWP_NOACTIVATE|SWP_NOREPOSITION);

                // set the initial size as the min track size
                SetMinTrackSize(rect.Size());
        }

        // create and init the size-grip
        if (!CreateSizeGrip(!bChild))
                return -1;

        return 0;
}

void CResizableDialog::OnDestroy() 
{
        if (m_bEnableSaveRestore)
                SaveWindowRect(m_sSection, m_bRectOnly);

        // remove child windows
        RemoveAllAnchors();

        __super::OnDestroy();
}

void CResizableDialog::OnSize(UINT nType, int cx, int cy) 
{
        CWnd::OnSize(nType, cx, cy);
        
        if (nType == SIZE_MAXHIDE || nType == SIZE_MAXSHOW)
                return;         // arrangement not needed

        if (nType == SIZE_MAXIMIZED)
                HideSizeGrip(&m_dwGripTempState);
        else
                ShowSizeGrip(&m_dwGripTempState);

        // update grip and layout
        UpdateSizeGrip();
        ArrangeLayout();
}

void CResizableDialog::OnGetMinMaxInfo(MINMAXINFO FAR* lpMMI) 
{
        MinMaxInfo(lpMMI);
}

// NOTE: this must be called after setting the layout
//       to have the dialog and its controls displayed properly
void CResizableDialog::EnableSaveRestore(LPCTSTR pszSection, BOOL bRectOnly)
{
        m_sSection = pszSection;

        m_bEnableSaveRestore = TRUE;
        m_bRectOnly = bRectOnly;

        // restore immediately
        LoadWindowRect(pszSection, bRectOnly);
}


BOOL CResizableDialog::OnEraseBkgnd(CDC* pDC) 
{
        // Windows XP doesn't like clipping regions ...try this!
        EraseBackground(pDC);
        return TRUE;

/*      ClipChildren(pDC);      // old-method (for safety)

        return CDialog::OnEraseBkgnd(pDC);
*/
}

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