myscrollview.cpp

来自「visual c 灵感编程的1-20节源码」· C++ 代码 · 共 152 行

// MyScrollView.cpp : implementation of the CMyScrollView class
//

#include "stdafx.h"
#include "MyScroll.h"

#include "MyScrollDoc.h"
#include "MyScrollView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CMyScrollView

IMPLEMENT_DYNCREATE(CMyScrollView, CScrollView)

BEGIN_MESSAGE_MAP(CMyScrollView, CScrollView)
	//{{AFX_MSG_MAP(CMyScrollView)
	ON_WM_KEYDOWN()
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CScrollView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CScrollView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CScrollView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMyScrollView construction/destruction

CMyScrollView::CMyScrollView()
{
	// TODO: add construction code here

}

CMyScrollView::~CMyScrollView()
{
}

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

	return CScrollView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CMyScrollView drawing

void CMyScrollView::OnDraw(CDC* pDC)
{
	CMyScrollDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
	pDC->TextOut ( 50, 50, "滚动轴实例");
}

void CMyScrollView::OnInitialUpdate()
{
	CScrollView::OnInitialUpdate();

	CSize sizeTotal;//设置滚动视图窗口的大小
	// TODO: calculate the total size of this view
	sizeTotal.cx = sizeTotal.cy = 300;//当窗口宽小于300，高小于300，显示相应的滚动条
	SetScrollSizes(MM_TEXT, sizeTotal);//滚动轴尺寸
}

/////////////////////////////////////////////////////////////////////////////
// CMyScrollView printing

BOOL CMyScrollView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}

void CMyScrollView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}

void CMyScrollView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}

/////////////////////////////////////////////////////////////////////////////
// CMyScrollView diagnostics

#ifdef _DEBUG
void CMyScrollView::AssertValid() const
{
	CScrollView::AssertValid();
}

void CMyScrollView::Dump(CDumpContext& dc) const
{
	CScrollView::Dump(dc);
}

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

/////////////////////////////////////////////////////////////////////////////
// CMyScrollView message handlers

void CMyScrollView::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	// TODO: Add your message handler code here and/or call default
	switch ( nChar )
	{
	case VK_HOME:
		OnVScroll ( SB_TOP, 0, NULL);
		OnHScroll ( SB_LEFT, 0, NULL);
		break;
	case VK_END:
		OnVScroll ( SB_BOTTOM, 0, NULL);
		OnHScroll ( SB_RIGHT, 0, NULL);
		break;
	case VK_UP:
		OnVScroll ( SB_LINEUP, 0, NULL);
		break;
	case VK_DOWN:
		OnVScroll ( SB_LINEDOWN, 0, NULL);
		break;
	case VK_PRIOR:
		OnVScroll ( SB_PAGEUP, 0, NULL);
		break;
	case VK_NEXT:
		OnVScroll ( SB_PAGEDOWN, 0, NULL);
		break;
	case VK_LEFT:
		OnHScroll ( SB_LINELEFT, 0, NULL);
		break;
	case VK_RIGHT:
		OnHScroll ( SB_LINERIGHT, 0, NULL);
		break;
	default:
		break;	
	}
	CScrollView::OnKeyDown(nChar, nRepCnt, nFlags);
}