formeditorrulerbar.cpp

FormEditor,模拟Visual Basic窗口编辑界面

// FormEditorRulerBar.cpp : implementation file
//

#include "stdafx.h"
#include "FormEditorRulerBar.h"
#include "memdc.h"

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

/////////////////////////////////////////////////////////////////////////////
// CFormEditorRulerBar

IMPLEMENT_DYNAMIC( CFormEditorRulerBar, CControlBar );

UINT CFormEditorRulerBar::g_nMsgDrawRuler =
	::RegisterWindowMessage(
		_T("CFormEditorRulerBar::g_nMsgDrawRuler")
		);

CFormEditorRulerBar::CFormEditorRulerBar()
	: m_nTotalAreaDeflateMetric( 3 )
{
}

CFormEditorRulerBar::~CFormEditorRulerBar()
{
}


BEGIN_MESSAGE_MAP(CFormEditorRulerBar, CControlBar)
	//{{AFX_MSG_MAP(CFormEditorRulerBar)
	ON_WM_ERASEBKGND()
	ON_WM_PAINT()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// CFormEditorRulerBar message handlers

void CFormEditorRulerBar::PostNcDestroy() 
{
	m_bAutoDelete = TRUE;
	CControlBar::PostNcDestroy();
}

void CFormEditorRulerBar::OnUpdateCmdUI(CFrameWnd* pTarget, BOOL bDisableIfNoHndler)
{
	pTarget;
	bDisableIfNoHndler;
}

CSize CFormEditorRulerBar::CalcFixedLayout(BOOL bStretch, BOOL bHorz)
{
	bStretch;
	bHorz;
bool bHorzRuler = IsHorzRuler();
	return
		CSize(
			bHorzRuler ? MAXSHORT : OnCalcVertRulerWidth(),
			bHorzRuler ? OnCalcHorzRulerHeight() : MAXSHORT
			);
}

LONG CFormEditorRulerBar::OnCalcHorzRulerHeight()
{
	return 24;
}

LONG CFormEditorRulerBar::OnCalcVertRulerWidth()
{
	return 24;
}

CView * CFormEditorRulerBar::GetTargetView()
{
CFrameWnd * pFrame = GetParentFrame();
	ASSERT_VALID( pFrame );
	ASSERT( (! pFrame->IsKindOf(RUNTIME_CLASS(CMiniFrameWnd)) ) );
	return pFrame->GetActiveView();
}

BOOL CFormEditorRulerBar::OnEraseBkgnd(CDC* pDC) 
{
	pDC;
	return TRUE;
}

void CFormEditorRulerBar::OnPaint() 
{
bool bHorzRuler = IsHorzRuler();
CRect rcClient;
	GetClientRect( &rcClient );
CPaintDC dcPaint( this );
CMemDC dc( &dcPaint);
	dc.FillSolidRect(
		&rcClient,
		::GetSysColor(COLOR_3DFACE )
		);
CView * pView = GetTargetView();
	if( pView == NULL )
		return;
CRect rcTotalArea;
	pView->GetClientRect( &rcTotalArea );
	pView->ClientToScreen( &rcTotalArea );
	ScreenToClient( &rcTotalArea );
	ASSERT( m_nTotalAreaDeflateMetric >= 0 );
	if( bHorzRuler )
	{
		rcTotalArea.top = rcClient.top;
		rcTotalArea.bottom = rcClient.bottom;
		rcTotalArea.DeflateRect( 0, m_nTotalAreaDeflateMetric );
	}
	else
	{
		rcTotalArea.left = rcClient.left;
		rcTotalArea.right = rcClient.right;
		rcTotalArea.DeflateRect( m_nTotalAreaDeflateMetric, 0 );
	}
MSG_DRAW_RULER_DATA _data;
	_data.m_pRuler = this;
	_data.m_pDC = &dc;
	_data.m_rcDrawableArea = rcTotalArea;
	pView->SendMessage(
		g_nMsgDrawRuler,
		(WPARAM)(&_data)
		);
}