MFC/C++ Helper Class for Window Resizing

// Example10Dlg.cpp : implementation file
//

#include "stdafx.h"
#include "WndResizerApp.h"
#include "Example10Dlg.h"


////////////////////////////////////////////////////////////////////////////////////////
// CExample10Dlg dialog
////////////////////////////////////////////////////////////////////////////////////////

#define EMBEDED_VIEW_ID 1001

IMPLEMENT_DYNAMIC(CExample10Dlg, CDialog)

	CExample10Dlg::CExample10Dlg(CWnd* pParent /*=NULL*/)
	: CDialog(CExample10Dlg::IDD, pParent)
{
	m_pView = NULL;
	m_resizer = NULL;
}

CExample10Dlg::~CExample10Dlg()
{

}

void CExample10Dlg::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
}


BEGIN_MESSAGE_MAP(CExample10Dlg, CDialog)
	ON_WM_DESTROY()
END_MESSAGE_MAP()

BOOL CExample10Dlg::OnInitDialog()
{
	CDialog::OnInitDialog();

	m_pView = CreateFormViewOnTheFly();
	ASSERT( m_pView != NULL );
	m_resizer = new CWndResizer();

	m_pView->SetDlgCtrlID(EMBEDED_VIEW_ID);

	BOOL bOk = m_resizer->Hook(this);
	ASSERT ( bOk );

	bOk = m_resizer->SetAnchor(EMBEDED_VIEW_ID, ANCHOR_ALL);
	ASSERT( bOk );

	bOk = m_resizer->SetAnchor(IDOK, ANCHOR_RIGHT | ANCHOR_BOTTOM);
	ASSERT(bOk );

	bOk = m_resizer->SetAnchor(IDCANCEL, ANCHOR_RIGHT | ANCHOR_BOTTOM);
	ASSERT(bOk );

	m_resizer->SetShowResizeGrip(TRUE);

	bOk = m_resizer->InvokeOnResized();
	ASSERT(bOk );

	return TRUE;  // return TRUE unless you set the focus to a control
	// EXCEPTION: OCX Property Pages should return FALSE
}



CFormView * CExample10Dlg::CreateFormViewOnTheFly()
{
	CCreateContext  ctx;
	// memebers we do not use, so set them to null
	ctx.m_pNewViewClass = RUNTIME_CLASS(CTestView);
	ctx.m_pNewDocTemplate = NULL;
	ctx.m_pLastView = NULL;
	ctx.m_pCurrentFrame = NULL;

	CFrameWnd * pFrameWnd = (CFrameWnd*) this;
	CFormView * pView = (CFormView *) pFrameWnd->CreateView(&ctx);
	if (pView->GetSafeHwnd() == NULL )
	{
		AfxMessageBox(_T("Failed to create view."));
		pView = NULL;
		return NULL;
	}
	// After a view is created, resize that to
	// have the same size as the dialog.

	CRect rc(0, 0, 0, 0);
	GetDlgItem(IDC_STATIC_MARKER)->GetWindowRect(&rc);
	ScreenToClient( &rc );
	pView->MoveWindow(rc);

	pView->OnInitialUpdate();
	pView->ShowWindow(SW_NORMAL);

	return pView;
}

void CExample10Dlg::OnDestroy()
{
	CDialog::OnDestroy();


	if (m_pView != NULL) {
		m_pView->DestroyWindow();
		m_pView = NULL;
	}

	delete m_resizer;
}


////////////////////////////////////////////////////////////////////////////////////////
// CTestView
////////////////////////////////////////////////////////////////////////////////////////
IMPLEMENT_DYNCREATE(CTestView, CFormView)

	CTestView::CTestView()
	: CFormView(CTestView::IDD)
{
	m_szDesignTimeSize.SetSize(0,0);
}

CTestView::~CTestView()
{
}

void CTestView::DoDataExchange(CDataExchange* pDX)
{
	CFormView::DoDataExchange(pDX);
}

BEGIN_MESSAGE_MAP(CTestView, CFormView)
	ON_WM_CREATE()
END_MESSAGE_MAP()


// CTestView diagnostics

#ifdef _DEBUG
void CTestView::AssertValid() const
{
	CFormView::AssertValid();
}

#ifndef _WIN32_WCE
void CTestView::Dump(CDumpContext& dc) const
{
	CFormView::Dump(dc);
}
#endif
#endif //_DEBUG


// CTestView message handlers



void CTestView::OnInitialUpdate()
{
	CFormView::OnInitialUpdate();
	SetupResizer();


}
void CTestView::SetupResizer()
{
	BOOL bOk = m_resizer.Hook(this, m_szDesignTimeSize);
	ASSERT( bOk );

	bOk = m_resizer.SetAnchor(IDC_EDIT1, ANCHOR_HORIZONTALLY);
	ASSERT( bOk );

	bOk = m_resizer.SetAnchor(IDC_BUTTON1, ANCHOR_RIGHT);
	ASSERT( bOk );

	bOk = m_resizer.SetAnchor(IDC_EDIT2, ANCHOR_ALL);
	ASSERT( bOk );

	bOk = m_resizer.SetAnchor(IDC_BUTTON2, ANCHOR_RIGHT | ANCHOR_BOTTOM);
	ASSERT( bOk );

	bOk = m_resizer.InvokeOnResized();
	ASSERT( bOk );

	CString sDebug = m_resizer.GetDebugInfo();
}



int CTestView::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
	if (CFormView::OnCreate(lpCreateStruct) == -1)
		return -1;

	m_szDesignTimeSize.SetSize(lpCreateStruct->cx, lpCreateStruct->cy);

	return 0;
}