mousedemoview.cpp

示例添加菜单界面程序,利用鼠标绘图,增加图形选择菜单

// MouseDemoView.cpp : implementation of the CMouseDemoView class
//

#include "stdafx.h"
#include "MouseDemo.h"

#include "MouseDemoDoc.h"
#include "MouseDemoView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CMouseDemoView

IMPLEMENT_DYNCREATE(CMouseDemoView, CView)

BEGIN_MESSAGE_MAP(CMouseDemoView, CView)
	//{{AFX_MSG_MAP(CMouseDemoView)
	ON_WM_LBUTTONDOWN()
	ON_WM_MOUSEMOVE()
	ON_WM_LBUTTONUP()
	ON_COMMAND(ID_LINE, OnLine)
	ON_COMMAND(ID_CIRCLE, OnCircle)
	ON_COMMAND(ID_RECTANGLE, OnRectangle)
	//}}AFX_MSG_MAP
	// Standard printing commands
	ON_COMMAND(ID_FILE_PRINT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_DIRECT, CView::OnFilePrint)
	ON_COMMAND(ID_FILE_PRINT_PREVIEW, CView::OnFilePrintPreview)
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMouseDemoView construction/destruction

CMouseDemoView::CMouseDemoView()
{
	m_dragging=0;
    m_shape=1;
	// TODO: add construction code here

}

CMouseDemoView::~CMouseDemoView()
{
}

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

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CMouseDemoView drawing

void CMouseDemoView::OnDraw(CDC* pDC)
{
	CMouseDemoDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
}

/////////////////////////////////////////////////////////////////////////////
// CMouseDemoView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CMouseDemoView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CMouseDemoView message handlers

void CMouseDemoView::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	m_dragging=1;
	m_pointorg=point;
	m_pointold=point;
	

	CView::OnLButtonDown(nFlags, point);
}

void CMouseDemoView::OnMouseMove(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	if(m_dragging)
	{
		CClientDC dc(this);
		dc.SetROP2(R2_NOT);
		dc.MoveTo(m_pointorg);
		m_dragging=0;
		switch(m_shape)
		{
		case 1:
			dc.LineTo(m_pointold);
		    dc.MoveTo(m_pointorg);
		    dc.LineTo(point);
	    	break;
	    case 2:
		    dc.SelectStockObject(NULL_BRUSH);
		    dc.Rectangle(m_pointorg.x,m_pointorg.y,m_pointold.x,m_pointold.y);
		    dc.MoveTo(m_pointorg);
		    dc.Rectangle(m_pointorg.x,m_pointorg.y,point.x,point.y);
		    break;
		case 3:
			dc.SelectStockObject(NULL_BRUSH);
		    dc.Ellipse(m_pointorg.x,m_pointorg.y,m_pointold.x,m_pointold.y);
		    dc.MoveTo(m_pointorg);
		    dc.Ellipse(m_pointorg.x,m_pointorg.y,point.x,point.y);
		    break;
		}
		m_pointold=point;
	}
	CView::OnMouseMove(nFlags, point);
}

void CMouseDemoView::OnLButtonUp(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	m_dragging=0;
    CClientDC dc(this);
	dc.SetROP2(R2_NOT);
	dc.MoveTo(m_pointorg);
	switch(m_shape)
	{
	case 1:
		dc.LineTo(m_pointold);
		dc.MoveTo(m_pointorg);
		dc.LineTo(point);
		break;
	case 2:
		dc.SelectStockObject(NULL_BRUSH);
		dc.Rectangle(m_pointorg.x,m_pointorg.y,m_pointold.x,m_pointold.y);
		dc.MoveTo(m_pointorg);
		dc.Rectangle(m_pointorg.x,m_pointorg.y,point.x,point.y);
		break;
	case 3:
        dc.SelectStockObject(NULL_BRUSH);
		dc.Ellipse(m_pointorg.x,m_pointorg.y,m_pointold.x,m_pointold.y);
		dc.MoveTo(m_pointorg);
		dc.Ellipse(m_pointorg.x,m_pointorg.y,point.x,point.y);
		break;
	}


	CView::OnLButtonUp(nFlags, point);
}

void CMouseDemoView::OnLine() 
{
	// TODO: Add your command handler code here
	m_shape=1;

}

void CMouseDemoView::OnCircle() 
{
	// TODO: Add your command handler code here
	m_shape=3;
}

void CMouseDemoView::OnRectangle() 
{
	// TODO: Add your command handler code here
	m_shape=2;
}