GDI/图象编程

开发平台：
Visual C++

DrawSysView.cpp：源码内容
							// DrawSysView.cpp : implementation of the CDrawSysView class
//
#include "stdafx.h"
#include "DrawSys.h"
#include "DrawSysDoc.h"
#include "DrawSysView.h"
#include "MainFrm.h"
#include "DrawShape.h"
#include "DrawRect.h"
#include "DrawEllipse.h"
#include "DrawCircle.h"
#include "DrawFillRect.h"
#include "DrawFillEllipse.h"
#include "DrawLine.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CDrawSysView
IMPLEMENT_DYNCREATE(CDrawSysView, CScrollView)
BEGIN_MESSAGE_MAP(CDrawSysView, CScrollView)
	//{{AFX_MSG_MAP(CDrawSysView)
	ON_COMMAND(ID_BUTTON_RECT, OnButtonRect)
	ON_WM_MOUSEMOVE()
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONUP()
	ON_COMMAND(ID_BUTTON_ELLIPSE, OnButtonEllipse)
	ON_COMMAND(ID_BUTTON_FILLELLIPSE, OnButtonFillellipse)
	ON_COMMAND(ID_BUTTON_CIRCLE, OnButtonCircle)
	ON_COMMAND(ID_BUTTON_FILLRECT, OnButtonFillrect)
	ON_COMMAND(ID_BUTTON_LINE, OnButtonLine)
	ON_MESSAGE(WM_CHOOSE, OnChoose)
	ON_WM_TIMER()
	ON_WM_DESTROY()
	ON_WM_RBUTTONDOWN()
	//}}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()
/////////////////////////////////////////////////////////////////////////////
// CDrawSysView construction/destruction
CDrawSysView::CDrawSysView()
{
	// TODO: add construction code here
	m_pDrawing	= NULL;
	m_iMode		= -1;
	m_nTimer	= 0;
	m_dwNewSel	= 0;
	m_dwOldSel	= 0;
	m_bNeed		= FALSE;
}
CDrawSysView::~CDrawSysView()
{
	if(m_pDrawing)
	{
		delete m_pDrawing;
		m_pDrawing = NULL;
	}
}
BOOL CDrawSysView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs
	return CScrollView::PreCreateWindow(cs);
}
/////////////////////////////////////////////////////////////////////////////
// CDrawSysView drawing
void CDrawSysView::OnDraw(CDC* pDC)
{
	CDrawSysDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
	int		iTotal	= pDoc->m_obArray.GetSize();
	for(int i=0; i<iTotal; i++)
	{
		((CDrawShape*)pDoc->m_obArray.GetAt(i))->Draw(pDC);
	}
}
/////////////////////////////////////////////////////////////////////////////
// CDrawSysView printing
BOOL CDrawSysView::OnPreparePrinting(CPrintInfo* pInfo)
{
	// default preparation
	return DoPreparePrinting(pInfo);
}
void CDrawSysView::OnBeginPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add extra initialization before printing
}
void CDrawSysView::OnEndPrinting(CDC* /*pDC*/, CPrintInfo* /*pInfo*/)
{
	// TODO: add cleanup after printing
}
/////////////////////////////////////////////////////////////////////////////
// CDrawSysView diagnostics
#ifdef _DEBUG
void CDrawSysView::AssertValid() const
{
	CScrollView::AssertValid();
}
void CDrawSysView::Dump(CDumpContext& dc) const
{
	CScrollView::Dump(dc);
}
CDrawSysDoc* CDrawSysView::GetDocument() // non-debug version is inline
{
	ASSERT(m_pDocument->IsKindOf(RUNTIME_CLASS(CDrawSysDoc)));
	return (CDrawSysDoc*)m_pDocument;
}
#endif //_DEBUG
void CDrawSysView::OnInitialUpdate() 
{
	CScrollView ::OnInitialUpdate();
	
	// TODO: Add your specialized code here and/or call the base class
	SetScrollSizes(MM_TEXT, CSize(800,600));
}
/////////////////////////////////////////////////////////////////////////////
// CDrawSysView message handlers
void CDrawSysView::OnButtonRect() 
{
	// TODO: Add your command handler code here
	if(m_pDrawing)
	{
		delete m_pDrawing;
		m_pDrawing = NULL;
	}
	m_pDrawing = new CDrawRect();
	m_iMode = 0;
	MyKillTimer();
}
void CDrawSysView::OnMouseMove(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	CDC*	pDC	= NULL;
	if(m_pDrawing)
	{
		pDC = GetDC();
		OnPrepareDC(pDC);
		pDC->DPtoLP(&point);
		m_pDrawing->OnMouseMove(pDC, nFlags, point);
		ReleaseDC(pDC);
	}
	CScrollView::OnMouseMove(nFlags, point);
}
void CDrawSysView::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	MyKillTimer();
	CDC*	pDC	= NULL;
	if(m_pDrawing)
	{
		pDC = GetDC();
		OnPrepareDC(pDC);
		pDC->DPtoLP(&point);
		m_pDrawing->OnLButtonDown(pDC, nFlags, point);
		ReleaseDC(pDC);
	}
	CScrollView::OnLButtonDown(nFlags, point);
}
void CDrawSysView::OnLButtonUp(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	CDrawSysDoc*	pDoc	= NULL;
	CDC*			pDC		= NULL;
	int				iIndex	= 0;
	BOOL			bSave	= FALSE;
	if(m_pDrawing)
	{
		pDC = GetDC();
		OnPrepareDC(pDC);
		pDC->DPtoLP(&point);
		bSave = m_pDrawing->OnLButtonUp(pDC, nFlags, point);
		ReleaseDC(pDC);
		
		if(bSave)
		{
			//存储对象
			m_pDrawing->m_tmCreate = CTime::GetCurrentTime();
			m_pDrawing->m_iID = ((CMainFrame*)AfxGetMainWnd())->m_wndShapeTree.GetID(m_pDrawing);
			pDoc = GetDocument();
			pDoc->AddShape(m_pDrawing);
			//更新树
			iIndex = pDoc->m_obArray.GetSize();
			((CMainFrame*)AfxGetMainWnd())->m_wndShapeTree.InsertShape(m_pDrawing, iIndex);
		}
		else
		{
			//释放对象
			delete m_pDrawing;
		}
		m_pDrawing = NULL;
		//创建新对象
		switch(m_iMode)
		{
		case 0:
			m_pDrawing = new CDrawRect();
			break;
		case 1:
			m_pDrawing = new CDrawEllipse();
			break;
		case 2:
			m_pDrawing = new CDrawCircle();
			break;
		case 3:
			m_pDrawing = new CDrawFillRect();
			break;
		case 4:
			m_pDrawing = new CDrawFillEllipse();
			break;
		case 5:
			m_pDrawing = new CDrawLine();
			break;
		default:
			//选择模式
			break;
		}
	}
	CScrollView::OnLButtonUp(nFlags, point);
}
void CDrawSysView::OnButtonEllipse() 
{
	// TODO: Add your command handler code here
	if(m_pDrawing)
	{
		delete m_pDrawing;
		m_pDrawing = NULL;
	}
	m_pDrawing = new CDrawEllipse();
	m_iMode = 1;
	MyKillTimer();
}
void CDrawSysView::OnButtonFillellipse() 
{
	// TODO: Add your command handler code here
	if(m_pDrawing)
	{
		delete m_pDrawing;
		m_pDrawing = NULL;
	}
	m_pDrawing = new CDrawFillEllipse();
	m_iMode = 4;
	MyKillTimer();
}
void CDrawSysView::OnButtonCircle() 
{
	// TODO: Add your command handler code here
	if(m_pDrawing)
	{
		delete m_pDrawing;
		m_pDrawing = NULL;
	}
	m_pDrawing = new CDrawCircle();
	m_iMode = 2;
	MyKillTimer();
}
void CDrawSysView::OnButtonFillrect() 
{
	// TODO: Add your command handler code here
	if(m_pDrawing)
	{
		delete m_pDrawing;
		m_pDrawing = NULL;
	}
	m_pDrawing = new CDrawFillRect();
	m_iMode = 3;
	MyKillTimer();
}
void CDrawSysView::OnButtonLine() 
{
	// TODO: Add your command handler code here
	if(m_pDrawing)
	{
		delete m_pDrawing;
		m_pDrawing = NULL;
	}
	m_pDrawing = new CDrawLine();
	m_iMode = 5;
	MyKillTimer();
}
LRESULT CDrawSysView::OnChoose(WPARAM wParam, LPARAM lParam)
{
	MyKillTimer();
	m_dwNewSel = wParam;
	m_dwOldSel = lParam;
	m_nTimer = SetTimer(0, 200, NULL);
	return 0;
}
void CDrawSysView::OnTimer(UINT nIDEvent) 
{
	// TODO: Add your message handler code here and/or call default
	FlashShape();
	CScrollView::OnTimer(nIDEvent);
}
void CDrawSysView::MyKillTimer()
{
	if(m_nTimer)
	{
		KillTimer(m_nTimer);
		m_nTimer = 0;
	}
	//清除以前闪烁
	if(m_bNeed)
	{
		FlashShape();
	}
	m_dwNewSel = 0;
	m_dwOldSel = 0;
	m_bNeed = FALSE;
}
void CDrawSysView::FlashShape()
{
	CDC*			pDC			= NULL;
	CDrawSysDoc*	pDoc		= NULL;
	int				iDrawMode	= 0;
	CPen			pen(PS_SOLID, 3, RGB(255, 0, 0));
	CPen*			pOldPen		= NULL;
	if(m_dwNewSel)
	{
		pDoc = GetDocument();
		pDC = GetDC();
		OnPrepareDC(pDC);
		iDrawMode = pDC->SetROP2(R2_NOTXORPEN);
		pOldPen = pDC->SelectObject(&pen);
		((CDrawShape*)(pDoc->m_obArray.GetAt(m_dwNewSel-1)))->Draw(pDC);
		pDC->SelectObject(pOldPen);
		pen.DeleteObject();
		pDC->SetROP2(iDrawMode);
		ReleaseDC(pDC);
		pDC = NULL;
		m_bNeed = !m_bNeed;
	}
}
void CDrawSysView::OnDestroy() 
{
	CScrollView::OnDestroy();
	
	// TODO: Add your message handler code here
	MyKillTimer();
}
BOOL CDrawSysView::OnScroll(UINT nScrollCode, UINT nPos, BOOL bDoScroll)
{
	// TODO: Add your specialized code here and/or call the base class
	MyKillTimer();
	return CScrollView::OnScroll(nScrollCode, nPos, bDoScroll);
}
BOOL CDrawSysView::OnScrollBy(CSize sizeScroll, BOOL bDoScroll) 
{
	// TODO: Add your specialized code here and/or call the base class
	MyKillTimer();
	return CScrollView::OnScrollBy(sizeScroll, bDoScroll);
}
void CDrawSysView::OnRButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	CDrawSysDoc*	pDoc	= GetDocument();
	int				iTotal	= pDoc->m_obArray.GetSize();
	BOOL			m_bIn	= FALSE;
	CDC*			pDC			= NULL;
	ASSERT_VALID(pDoc);
	pDC = GetDC();
	OnPrepareDC(pDC);
	pDC->DPtoLP(&point);
	for(int i=0; i<iTotal; i++)
	{
		m_bIn = ((CDrawShape*)pDoc->m_obArray.GetAt(i))->PtInShape(point);
		if(m_bIn)
			break;
	}
	if(m_bIn)
	{
		((CDrawShape*)pDoc->m_obArray.GetAt(i))->ShowProperty();
	}
	pDC->LPtoDP(&point);
	ReleaseDC(pDC);
	CScrollView::OnRButtonDown(nFlags, point);
}

						