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CResizableDialog

, 25 Jul 2012
A CDialog derived class to implement resizable dialogs with MFC
resizabledialog_1_1.zip
ResizableDialog
.cvsignore
Demo.dsp
Demo.dsw
Release_Static
Demo.exe
res
bitmap1.bmp
Demo.ico
toolbar1.bmp
resizabledialog_demo.zip
Demo.dsp
Demo.dsw
Release
Demo.exe
bitmap1.bmp
Demo.ico
toolbar1.bmp
resizabledialog_src.zip
resizablelib_1_1.zip
ResizableLib
.cvsignore
Docs
CVS
Entries
Repository
Root
Release_Static
ResizableLib.lib
ResizableLib.dsp
ResizableLib.dsw
// ResizableDialog.cpp : implementation file
//
/////////////////////////////////////////////////////////////////////////////
//
// Copyright (C) 2000-2001 by Paolo Messina
// (http://www.geocities.com/ppescher - ppescher@yahoo.com)
//
// 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::Construct()
{
	m_bInitDone = FALSE;

	m_bEnableSaveRestore = FALSE;
}

CResizableDialog::CResizableDialog()
{
	Construct();
}

CResizableDialog::CResizableDialog(UINT nIDTemplate, CWnd* pParentWnd)
	: CDialog(nIDTemplate, pParentWnd)
{
	Construct();
}

CResizableDialog::CResizableDialog(LPCTSTR lpszTemplateName, CWnd* pParentWnd)
	: CDialog(lpszTemplateName, pParentWnd)
{
	Construct();
}

CResizableDialog::~CResizableDialog()
{
}


BEGIN_MESSAGE_MAP(CResizableDialog, CDialog)
	//{{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 (CDialog::OnCreate(lpCreateStruct) == -1)
		return -1;

	// 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);

	if (!InitGrip())
		return -1;

	return 0;
}

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

	// gets the template size as the min track size
	CRect rc;
	GetWindowRect(&rc);
	SetMinTrackSize(rc.Size());

	// init

	UpdateGripPos();

	m_bInitDone = TRUE;

	return TRUE;  // return TRUE unless you set the focus to a control
}

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

	// remove child windows
	RemoveAllAnchors();

	CDialog::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 (m_bInitDone)
	{
		// update size-grip
		UpdateGripPos();

		ArrangeLayout();
	}
}

void CResizableDialog::OnGetMinMaxInfo(MINMAXINFO FAR* lpMMI) 
{
	if (!m_bInitDone)
		return;

	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) 
{
	ClipChildren(pDC);

	return CDialog::OnEraseBkgnd(pDC);
}

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License

This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Paolo Messina
Software Developer RoboTech srl
Italy Italy
Paolo began programming at the age of 9 with a glorious 8086 and GW-BASIC, then he played a bit with C, ASM and Pascal. He tought himself MFC and Windows programming, to exploit his studies of C++. Always attracted by low-level programming and Assembly, he's beginning to appreciate the joys of templates and STL. At work he changed his mind about Java, discovered Eclipse IDE, and now think it's cool.
 
He lives in Follonica, Italy.
 
He has been abroad in the U.S. to work on his final thesis before graduating. For seven months he was playing with airplanes and automatic control at the Unversity of Illinois at Urbana-Champaign.
 
He graduated in Computer Science Engineering at the University of Pisa, Italy, in December 2003.
 
Currently working for an edutainment robotics company (www.robotechsrl.com).
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