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CResizableDialog

, 25 Jul 2012
A CDialog derived class to implement resizable dialogs with MFC
// DemoDlg.cpp : implementation file
//

#include "stdafx.h"
#include "Demo.h"
#include "DemoDlg.h"

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


/////////////////////////////////////////////////////////////////////////////
// CDemoDlg dialog

CDemoDlg::CDemoDlg(CWnd* pParent /*=NULL*/)
	: CResizableDialog(CDemoDlg::IDD, pParent)
{
	//{{AFX_DATA_INIT(CDemoDlg)
		// NOTE: the ClassWizard will add member initialization here
	//}}AFX_DATA_INIT
	// Note that LoadIcon does not require a subsequent DestroyIcon in Win32
	m_hIcon = AfxGetApp()->LoadIcon(IDR_MAINFRAME);
}

void CDemoDlg::DoDataExchange(CDataExchange* pDX)
{
	CResizableDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CDemoDlg)
		// NOTE: the ClassWizard will add DDX and DDV calls here
	//}}AFX_DATA_MAP
}

BEGIN_MESSAGE_MAP(CDemoDlg, CResizableDialog)
	//{{AFX_MSG_MAP(CDemoDlg)
	ON_BN_CLICKED(IDC_RADIO1, OnRadio1)
	ON_BN_CLICKED(IDC_RADIO2, OnRadio2)
	ON_WM_CREATE()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDemoDlg message handlers

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

	// Set the icon for this dialog.  The framework does this automatically
	//  when the application's main window is not a dialog
	SetIcon(m_hIcon, TRUE);			// Set big icon
	SetIcon(m_hIcon, FALSE);		// Set small icon

	// preset layout
	AddAnchor(IDOK, BOTTOM_RIGHT);
	AddAnchor(IDCANCEL, BOTTOM_RIGHT);
	
	AddAnchor(IDC_SPIN1, TOP_RIGHT);

	AddAnchor(IDC_LABEL1, TOP_LEFT);
	AddAnchor(IDC_EDIT1, TOP_LEFT, BOTTOM_RIGHT);

	AddAnchor(IDC_RADIO1, BOTTOM_LEFT);
	AddAnchor(IDC_RADIO2, BOTTOM_LEFT);
	AddAnchor(IDC_GROUP1, BOTTOM_LEFT, BOTTOM_RIGHT);

	// other initializations

	// grip is visible by default
	CheckRadioButton(IDC_RADIO1, IDC_RADIO2, IDC_RADIO2);
	GetDlgItem(IDC_RADIO2)->SetFocus();

	SetDlgItemText(IDC_EDIT1, _T("CResizableDialog\r\n\r\n"
		"This dialog can be resized to full width and half the height of the screen.\r\n"
		"The minimum size is by default the one in the dialog editor.\r\n"
		"Size grip can be switched off.\r\n\r\n"
		"Try to maximize and then to restore the dialog!\r\n"
		"Isn't it cool?"));

	// min/max size settings

	// get desktop size
	CRect rc;
	GetDesktopWindow()->GetClientRect(&rc);

	// set max tracking size to half a screen
	SetMaxTrackSize(CSize(rc.Width(), rc.Height()/2));

	// maximized position and size on top of the screen
	rc.bottom = 100;
	SetMaximizedRect(rc);

	// save/restore
	// (for dialog based app, default is a .INI file with
	// the application's name in the Windows directory)
	EnableSaveRestore(_T("DemoDlg"));

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

void CDemoDlg::OnRadio1() 
{
	ShowSizeGrip(FALSE);
}

void CDemoDlg::OnRadio2() 
{
 	ShowSizeGrip(TRUE);
}


#define WS_EX_LAYOUT_RTL	0x00400000

int CDemoDlg::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
//	ModifyStyleEx(0, WS_EX_LAYOUT_RTL);

	if (CResizableDialog::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	return 0;
}

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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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