drawview.cpp

visual c++ 时尚编程百例 全部源代码

// DrawView.cpp : implementation of the CDrawView class
//

#include "stdafx.h"
#include "Draw.h"

#include "DrawDoc.h"
#include "DrawView.h"

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

/////////////////////////////////////////////////////////////////////////////
// CDrawView

IMPLEMENT_DYNCREATE(CDrawView, CView)

BEGIN_MESSAGE_MAP(CDrawView, CView)
	//{{AFX_MSG_MAP(CDrawView)
	ON_COMMAND(ID_DRAW_ELLIPSE, OnDrawEllipse)
	ON_COMMAND(ID_DRAW_RECTANGLE, OnDrawRectangle)
	ON_COMMAND(ID_DRAW_SKETCH, OnDrawSketch)
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONUP()
	ON_WM_MOUSEMOVE()
	ON_UPDATE_COMMAND_UI(ID_DRAW_ELLIPSE, OnUpdateDrawEllipse)
	ON_UPDATE_COMMAND_UI(ID_DRAW_RECTANGLE, OnUpdateDrawRectangle)
	ON_UPDATE_COMMAND_UI(ID_DRAW_SKETCH, OnUpdateDrawSketch)
	//}}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()

/////////////////////////////////////////////////////////////////////////////
// CDrawView construction/destruction

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

}

CDrawView::~CDrawView()
{
}

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

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CDrawView drawing

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

/////////////////////////////////////////////////////////////////////////////
// CDrawView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CDrawView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CDrawView message handlers

void CDrawView::OnDrawEllipse() 
{
	ResetAllFlags();
	m_bEllipse=true;
	// TODO: Add your command handler code here
	
}

void CDrawView::OnDrawRectangle() 
{
	ResetAllFlags();
	m_bRectangle=true;
	// TODO: Add your command handler code here
	
}

void CDrawView::OnDrawSketch() 
{
	ResetAllFlags();
	m_bSketch=true;

	// TODO: Add your command handler code here
	
}

void CDrawView::OnLButtonDown(UINT nFlags, CPoint point) 
{
	if(m_bRectangle||m_bEllipse)
	{
	m_startPoint=point;
	m_LastEndPoint=point;
	SetCapture();
	}
	if(m_bSketch)
	{
		m_startPoint=point;
	}

	// TODO: Add your message handler code here and/or call default
	
	CView::OnLButtonDown(nFlags, point);
}

void CDrawView::OnLButtonUp(UINT nFlags, CPoint point) 
{
	CClientDC dc(this);
	if(m_bRectangle&&(GetCapture()==this))
	{
		ReleaseCapture();
		CGdiObject*pOldObject=dc.SelectStockObject(NULL_BRUSH);
		dc.Rectangle(m_startPoint.x,m_startPoint.y,point.x,point.y);
		dc.SelectObject(pOldObject);
	}
	if(m_bEllipse&&(GetCapture()==this))
	{
		ReleaseCapture();
		CGdiObject*pOldObject=dc.SelectStockObject(NULL_BRUSH);
		dc.Ellipse(m_startPoint.x,m_startPoint.y,point.x,point.y);
		dc.SelectObject(pOldObject);
	}
	// TODO: Add your message handler code here and/or call default
	
	CView::OnLButtonUp(nFlags, point);
}

void CDrawView::OnMouseMove(UINT nFlags, CPoint point) 
{
	CClientDC dc(this);
	if(m_bSketch&&(nFlags&&MK_LBUTTON))
	{
		dc.MoveTo(m_startPoint);
		dc.LineTo(point);
		m_startPoint=point;
	}
	if(m_bRectangle&&(nFlags&&MK_LBUTTON))
	{
		CGdiObject*pOldObject=dc.SelectStockObject(NULL_BRUSH);
		int nDrawmdoe=dc.GetROP2();
		dc.SetROP2(R2_NOTCOPYPEN);
		dc.Rectangle(m_LastEndPoint.x,m_LastEndPoint.y,m_startPoint.x,m_startPoint.y);
		dc.SetROP2(nDrawmdoe);
		dc.Rectangle(m_startPoint.x,m_startPoint.y,point.x,point.y);
		dc.SelectObject(pOldObject);
		m_LastEndPoint=point;
	}
	if(m_bEllipse&&(nFlags&&MK_LBUTTON))
	{
		CGdiObject*pOldObject=dc.SelectStockObject(NULL_BRUSH);
		int nDrawmode=dc.GetROP2();
		dc.SetROP2(R2_NOTCOPYPEN);
		dc.Ellipse(m_LastEndPoint.x,m_LastEndPoint.y,m_startPoint.x,m_startPoint.y);
		dc.SelectObject(pOldObject);
		m_LastEndPoint=point;
	}
	// TODO: Add your message handler code here and/or call default
	
	CView::OnMouseMove(nFlags, point);
}

void CDrawView::OnUpdateDrawEllipse(CCmdUI* pCmdUI) 
{
	pCmdUI->SetCheck(m_bEllipse);
	// TODO: Add your command update UI handler code here
	
}

void CDrawView::OnUpdateDrawRectangle(CCmdUI* pCmdUI) 
{
	pCmdUI->SetCheck(m_bRectangle);
	// TODO: Add your command update UI handler code here
	
}

void CDrawView::OnUpdateDrawSketch(CCmdUI* pCmdUI) 
{
	pCmdUI->SetCheck(m_bSketch);
	// TODO: Add your command update UI handler code here
	
}
void CDrawView::ResetAllFlags()
{
	m_bRectangle=false;
	m_bSketch=false;
	m_bEllipse=false;
}