ex13aview.cpp

VC技术内幕源程序

// ex13aView.cpp : implementation of the CEx13aView class
//

#include "stdafx.h"
#include "ex13a.h"

#include "ex13aDoc.h"
#include "ex13aView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CEx13aView

IMPLEMENT_DYNCREATE(CEx13aView, CView)

BEGIN_MESSAGE_MAP(CEx13aView, CView)
	//{{AFX_MSG_MAP(CEx13aView)
	ON_COMMAND(ID_DRAW_CIRCLE, OnDrawCircle)
	ON_UPDATE_COMMAND_UI(ID_DRAW_CIRCLE, OnUpdateDrawCircle)
	ON_COMMAND(ID_DRAW_PATTERN, OnDrawPattern)
	ON_UPDATE_COMMAND_UI(ID_DRAW_PATTERN, OnUpdateDrawPattern)
	ON_COMMAND(ID_DRAW_SQUARE, OnDrawSquare)
	ON_UPDATE_COMMAND_UI(ID_DRAW_SQUARE, OnUpdateDrawSquare)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CEx13aView construction/destruction

CEx13aView::CEx13aView() : m_rect(0, 0, 100, 100)
{
	m_bCircle = TRUE;
	m_bPattern = FALSE;
}

CEx13aView::~CEx13aView()
{
}

BOOL CEx13aView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CEx13aView drawing

void CEx13aView::OnDraw(CDC* pDC)
{
	CBrush brush(HS_BDIAGONAL, 0L); // brush with diagonal pattern

	if (m_bPattern) {
		pDC->SelectObject(&brush);
	}
	else {
		pDC->SelectStockObject(WHITE_BRUSH);
	}
	if (m_bCircle) {
		pDC->Ellipse(m_rect);
	}
	else {
		pDC->Rectangle(m_rect);
	}
	pDC->SelectStockObject(WHITE_BRUSH); // Deselects brush
	                                     //  if selected
}

/////////////////////////////////////////////////////////////////////////////
// CEx13aView diagnostics

#ifdef _DEBUG
void CEx13aView::AssertValid() const
{
	CView::AssertValid();
}

void CEx13aView::Dump(CDumpContext& dc) const
{
	CView::Dump(dc);
}

CEx13aDoc* CEx13aView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CEx13aDoc)));
	return (CEx13aDoc*)m_pDocument;
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CEx13aView message handlers

void CEx13aView::OnDrawCircle() 
{
	m_bCircle = TRUE;
	m_rect += CPoint(25, 25);
	InvalidateRect(m_rect);
}

void CEx13aView::OnUpdateDrawCircle(CCmdUI* pCmdUI) 
{
	pCmdUI->Enable(!m_bCircle);
}

void CEx13aView::OnDrawPattern() 
{
	m_bPattern ^= 1;
}

void CEx13aView::OnUpdateDrawPattern(CCmdUI* pCmdUI) 
{
	pCmdUI->SetCheck(m_bPattern);
}

void CEx13aView::OnDrawSquare() 
{
	m_bCircle = FALSE;
	m_rect += CPoint(25, 25);
	InvalidateRect(m_rect);
}

void CEx13aView::OnUpdateDrawSquare(CCmdUI* pCmdUI) 
{
	pCmdUI->Enable(m_bCircle);
}