viewscrollview.cpp

来自「《突破Visual C++.NET编程实例五十讲+源文件,初学者学习的好东东！」· C++ 代码 · 共 324 行

// ViewScrollView.cpp : CViewScrollView 类的实现
//

#include "stdafx.h"
#include "ViewScroll.h"

#include "ViewScrollDoc.h"
#include "ViewScrollView.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#endif


// CViewScrollView

IMPLEMENT_DYNCREATE(CViewScrollView, CView)

BEGIN_MESSAGE_MAP(CViewScrollView, CView)
	// 标准打印命令
	ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
	ON_WM_HSCROLL()
	ON_WM_VSCROLL()
	ON_COMMAND(ID_VIEWROLL_ENABLE, OnViewrollEnable)
	ON_COMMAND(ID_VIEWROLL_CANCEL, OnViewrollCancel)
	ON_UPDATE_COMMAND_UI(ID_VIEWROLL_ENABLE, OnUpdateViewrollEnable)
	ON_UPDATE_COMMAND_UI(ID_VIEWROLL_CANCEL, OnUpdateViewrollCancel)
END_MESSAGE_MAP()

// CViewScrollView 构造/销毁

CViewScrollView::CViewScrollView()
{
	// TODO: 在此处添加构造代码

}

CViewScrollView::~CViewScrollView()
{
}

BOOL CViewScrollView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: 在此处通过修改 CREATESTRUCT cs 来修改窗口类或
	// 样式

	return CView::PreCreateWindow(cs);
}

// CViewScrollView 绘制

void CViewScrollView::OnDraw(CDC* pDC)
{
	CViewScrollDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);

	// TODO: 在此处为本机数据添加绘制代码
	int        i,  k,  n, nHeight;
	CString    outputLine, str;
	CFont      font;
	TEXTMETRIC tm;

	font.CreateFont(-160, 80, 0, 0, 400, FALSE, FALSE, 0,
		ANSI_CHARSET, OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS,
		DEFAULT_QUALITY, DEFAULT_PITCH | FF_SWISS, "Arial");
	CFont* pOldFont = pDC->SelectObject(&font);
	pDC->GetTextMetrics(&tm);
	nHeight = tm.tmHeight + tm.tmExternalLeading;

	for (i = 0; i < 10; i++) {
		outputLine.Format("%02x   ", i);
		for (k = 0; k <10; k++) {
			n = (i*k) & 0x00ff;//<256
			str.Format("%02x ", n);
			outputLine += str;
		}
		pDC->TextOut(720, (i * nHeight+720), outputLine);
	}
	pDC->SelectObject(pOldFont);
}


// CViewScrollView 打印

BOOL CViewScrollView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// 默认准备
	return DoPreparePrinting(pInfo);
}

void CViewScrollView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: 打印前添加额外的初始化
}

void CViewScrollView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: 打印后添加清除过程
}


// CViewScrollView 诊断

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

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

CViewScrollDoc* CViewScrollView::GetDocument() const // 非调试版本是内联的
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CViewScrollDoc)));
	return (CViewScrollDoc*)m_pDocument;
}
#endif //_DEBUG


// CViewScrollView 消息处理程序

void CViewScrollView::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值
	if (pScrollBar != NULL && pScrollBar->SendChildNotifyLastMsg())
		return;     // eat it
	// ignore scroll bar msgs from other controls
	if (pScrollBar != GetScrollBarCtrl(SB_HORZ))
		return;
	int x=GetScrollPos(SB_HORZ);
	int xOrig=x;
	switch(nSBCode)
	{	case SB_LEFT:
			x = 0;
			break;
		case SB_RIGHT:
			x = INT_MAX;
			break;
		case SB_LINELEFT:
			x -= m_lineDev.cx;
			break;
		case SB_LINERIGHT:
			x += m_lineDev.cx;
			break;
		case SB_PAGELEFT:
			x-= m_pageDev.cx;
			break;
		case SB_PAGERIGHT:
			x+= m_pageDev.cx;
			break;
		case SB_THUMBTRACK:
			x = nPos;
			break;
		default:
			break;
	}
	int xMax = GetScrollLimit(SB_HORZ);
	if(x>xMax)
		x=xMax-1;
	if(x<0)
		x=0;
	SetScrollPos(SB_HORZ,x, TRUE);
	if(x-xOrig==0)
		return;
//	ScrollWindow(xOrig-x,0,NULL,NULL);
	Invalidate(TRUE);
	UpdateWindow();

	//CView::OnHScroll(nSBCode, nPos, pScrollBar);
}

void CViewScrollView::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
	// TODO: 在此添加消息处理程序代码和/或调用默认值
	if (pScrollBar != NULL && pScrollBar->SendChildNotifyLastMsg())
		return;     // eat it
	// ignore scroll bar msgs from other controls
	if (pScrollBar != GetScrollBarCtrl(SB_VERT))
		return;
	int y=GetScrollPos(SB_VERT);
	int yOrig=y;
	switch(nSBCode)
	{	case SB_TOP:
			y = 0;
			break;
		case SB_BOTTOM:
			y = INT_MAX;
			break;
		case SB_LINEUP:
			y-= m_lineDev.cy;
			break;
		case SB_LINEDOWN :
			y+= m_lineDev.cy;
			break;
		case SB_PAGEUP:
			y-= m_pageDev.cy;
			break;
		case SB_PAGEDOWN:
			y += m_pageDev.cy;
			break;
		case SB_THUMBTRACK:
			y = nPos;
			break;
		default:
			break;
	}
	int yMax = GetScrollLimit(SB_VERT);
	if(y>yMax)
		y=yMax-1;
	if(y<0)
		y=0;

	SetScrollPos(SB_VERT,y, TRUE);
	if(y-yOrig==0)
		return;
//	ScrollWindow(0,(yOrig-y),NULL,NULL);
	Invalidate(TRUE);
	UpdateWindow();	

	//CView::OnVScroll(nSBCode, nPos, pScrollBar);
}







void CViewScrollView::OnPrepareDC(CDC* pDC, CPrintInfo* pInfo)
{
	// TODO: 在此添加专用代码和/或调用基类
	CRect cClientRect;
	GetClientRect(&cClientRect);	
	pDC->SetMapMode(MM_ANISOTROPIC);
	pDC->SetWindowExt(1440,1440);
	pDC->SetViewportExt(pDC->GetDeviceCaps(LOGPIXELSX),
					pDC->GetDeviceCaps(LOGPIXELSX));
	CPoint cPOrg(GetScrollPos(SB_HORZ),GetScrollPos(SB_VERT));
	//设置逻辑坐标原点，必须设置为-cPOrg
	pDC->SetViewportOrg(-cPOrg);
	//CView::OnPrepareDC(pDC, pInfo);

	CView::OnPrepareDC(pDC, pInfo);
}

void CViewScrollView::OnInitialUpdate()
{
	CView::OnInitialUpdate();

	// TODO: 在此添加专用代码和/或调用基类
	SetParameter();
	EnableScrollBarCtrl(SB_HORZ,TRUE);
	////设置水平滚动条的滚动范围
	SetScrollRange(SB_HORZ,0,m_totalDev.cx,FALSE);
	EnableScrollBarCtrl(SB_VERT,TRUE);
	//设置垂直滚动条的滚动范围
	SetScrollRange(SB_VERT,0,m_totalDev.cy,FALSE);
	//初始化滚动条位置
	SetScrollPos(SB_HORZ,0,TRUE);
	SetScrollPos(SB_VERT,0,TRUE);
}

void CViewScrollView::SetParameter(void)
{
	cSizeTotal.cx=14400;
	cSizeTotal.cy=14400;
    CSize sizePage(cSizeTotal.cx / 10,
                   cSizeTotal.cy / 10);  
    CSize sizeLine(cSizeTotal.cx / 100,
                   cSizeTotal.cy / 100); 
	CDC* pDC=this->GetDC();
	pDC->SetMapMode(MM_ANISOTROPIC);
	pDC->SetWindowExt(1440,1440);
	pDC->SetViewportExt(pDC->GetDeviceCaps(LOGPIXELSX),
					pDC->GetDeviceCaps(LOGPIXELSX));
	pDC->SetViewportOrg(0,0);
	m_totalDev = cSizeTotal;
		pDC->LPtoDP((LPPOINT)&m_totalDev);
		m_pageDev = sizePage;
		pDC->LPtoDP((LPPOINT)&m_pageDev);
		m_lineDev = sizeLine;
		pDC->LPtoDP((LPPOINT)&m_lineDev);
		this->ReleaseDC(pDC);
	
}

void CViewScrollView::OnViewrollEnable()
{
	// TODO: 在此添加命令处理程序代码
	SetScrollRange(SB_HORZ,0,m_totalDev.cx,TRUE);
	EnableScrollBarCtrl(SB_HORZ,TRUE);
	SetScrollRange(SB_VERT,0,m_totalDev.cy,TRUE);
	EnableScrollBarCtrl(SB_VERT,TRUE);

}

void CViewScrollView::OnViewrollCancel()
{
	// TODO: 在此添加命令处理程序代码
	SetScrollRange(SB_HORZ,0,0,TRUE);
	EnableScrollBarCtrl(SB_HORZ,FALSE);
	SetScrollRange(SB_VERT,0,0,TRUE);
	EnableScrollBarCtrl(SB_VERT,FALSE);
}

void CViewScrollView::OnUpdateViewrollEnable(CCmdUI *pCmdUI)
{
	// TODO: 在此添加命令更新用户界面处理程序代码
	pCmdUI->Enable((GetScrollLimit(SB_HORZ)==0)&&(GetScrollLimit(SB_VERT)==0));   	

}

void CViewScrollView::OnUpdateViewrollCancel(CCmdUI *pCmdUI)
{
	// TODO: 在此添加命令更新用户界面处理程序代码
	pCmdUI->Enable((GetScrollLimit(SB_HORZ)>0)&&(GetScrollLimit(SB_VERT)>0));

}