ngdialogexpander.cpp

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// Expanding and collapsing dialogs
//
// Michael Walz ([e-mail])
// Dec. 99
//

#include "StdAfx.h"
#include "NGDialogExpander.h"


static void ShrinkDialog(CWnd *pDlg, int idmark)
{   
	ASSERT(pDlg != NULL) ;  
	CWnd *pWndMark = pDlg->GetDlgItem(idmark) ;
	ASSERT(pWndMark != NULL) ;
	CRect markrect ;
	CRect dlgrect ;
	CRect clientrect ;
	//CWnd *pParentWnd = pDlg->GetParent() ;
	int offset ;

	pDlg->GetClientRect(&clientrect) ;  // clientrect of the dialog
	pDlg->GetWindowRect(&dlgrect) ;	  // rectangle of the dialog window

	// get height of the title bar
	offset = dlgrect.Height() - clientrect.bottom ;

	pWndMark->GetWindowRect(&markrect) ;


	pDlg->ScreenToClient(&markrect) ;

	// calculate the new rectangle of the dialog window
	dlgrect.bottom = dlgrect.top + markrect.bottom + offset;

	pDlg->MoveWindow (dlgrect.left, dlgrect.top, dlgrect.Width(), dlgrect.Height()) ;
}


CNGDialogExpander::CNGDialogExpander()
{
	m_bIsInitialized = FALSE ;
}


void CNGDialogExpander::Initialize(	CWnd *pDialog,
								BOOL bInitiallyExpanded,
								int IdExpandButton,
								int IdCollapsedMark,
								int IdCollapsedText)
{
	m_IdCollapsedText = IdCollapsedText;

	CString sCollapsedText;
	m_pDialog->GetDlgItemText(m_IdCollapsedText, sCollapsedText) ; 

	CWnd* pWndMark = m_pDialog->GetDlgItem(IdCollapsedText);
	ASSERT(NULL != pWndMark);

	pWndMark->ShowWindow(SW_HIDE);	// hide the "delimiting" control

	Initialize(pDialog,
				bInitiallyExpanded,
				IdExpandButton,
				IdCollapsedMark,
				sCollapsedText);
}


void CNGDialogExpander::Initialize(	CWnd *pDialog,
									BOOL bInitiallyExpanded,
									int IdExpandButton,
									int IdCollapsedMark,
									const CString& sCollapsedText)
{
	m_IdExpandButton = IdExpandButton;
	m_IdCollapsedMark = IdCollapsedMark;
	m_bIsInitialized = TRUE ;
	m_pDialog = pDialog ;
	m_bIsExpanded = TRUE ;

	m_pDialog->GetWindowRect(&m_dialogrect) ;	  // rectangle of the dialog window
	m_pDialog->GetDlgItemText(IdExpandButton, m_sTextMore) ; 

	m_sTextLess = sCollapsedText;

	CWnd* pWndMark = m_pDialog->GetDlgItem(m_IdCollapsedMark);
	ASSERT(NULL != pWndMark);
	pWndMark->ShowWindow(SW_HIDE);	// hide the "delimiting" control

	if (bInitiallyExpanded)
	{
		CWnd *pButton = m_pDialog->GetDlgItem(m_IdExpandButton) ;
		pButton->SetWindowText(m_sTextLess ) ;
	}
	else
	{
		OnExpandButton();
	}
}


void CNGDialogExpander::OnExpandButton(void)
{
	ASSERT(m_bIsInitialized) ;

	m_bIsExpanded = !m_bIsExpanded;	

	if (m_bIsExpanded)
	{
		// ShrinkDialog(m_pDialog, m_IdExpandedMark) ;
		CRect rect ;
		m_pDialog->GetWindowRect(&rect) ;
		rect.bottom = rect.top + m_dialogrect.Height();
		rect.right = rect.left + m_dialogrect.Width();
		m_pDialog->MoveWindow (&rect) ;
	}
	else
	{
		ShrinkDialog(m_pDialog, m_IdCollapsedMark );
	}

  
	CWnd* pButton = m_pDialog->GetDlgItem(m_IdExpandButton);
	ASSERT(NULL != pButton);
	if (NULL != pButton)
	{
		pButton->SetWindowText(!m_bIsExpanded ? m_sTextMore : m_sTextLess);
	}
}