mydrawview.cpp

数据库开发

// MyDrawView.cpp : implementation of the CMyDrawView class
//

#include "stdafx.h"
#include "MyDraw.h"

#include "MyDrawDoc.h"
#include "MyDrawView.h"

#include "Ellipse.h"
#include "Line.h"

#include "LineProperties.h"
#include "EllipseProperties.h"

#include "Rectangle.h"
#include "Text.h"
#include "TextProperties.h"

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

/////////////////////////////////////////////////////////////////////////////
// CMyDrawView

IMPLEMENT_DYNCREATE(CMyDrawView, CView)

BEGIN_MESSAGE_MAP(CMyDrawView, CView)
//{{AFX_MSG_MAP(CMyDrawView)
ON_WM_LBUTTONDOWN()
ON_WM_SETCURSOR()
ON_WM_LBUTTONDBLCLK()
ON_COMMAND(ID_BUTTON_LINE, OnButtonLine)
ON_COMMAND(ID_BUTTON_ELLIPSE, OnButtonEllipse)
ON_COMMAND(ID_BUTTON_RECTANGLE, OnButtonRectangle)
ON_COMMAND(ID_BUTTON_ARC, OnButtonArc)
ON_WM_KEYUP()
ON_COMMAND(ID_BUTTON_TEXT, OnButtonText)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CMyDrawView construction/destruction

CMyDrawView::CMyDrawView()
{
	// TODO: add construction code here
	m_tracker.m_nStyle=CRectTracker::resizeInside|CRectTracker::dottedLine; 
	m_tracker.m_rect.SetRect(0,0,0,0); 
	m_tracker.m_nHandleSize=8; 
}

CMyDrawView::~CMyDrawView()
{
}

BOOL CMyDrawView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs
	
	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CMyDrawView drawing

void CMyDrawView::OnDraw(CDC* pDC)
{
	CMyDrawDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
	if(m_ObjectList.GetCount() <= 0)
		return;
	
	POSITION pos = m_ObjectList.GetHeadPosition();
	CDrawElement* pObject=NULL;
	
	while(pos != NULL)
	{
		pObject=(CDrawElement*)m_ObjectList.GetNext(pos);
		if(pObject != NULL)
		{
			if (pObject->bIsSelected)
			{
				pObject->startX=m_tracker.m_rect.left;
				pObject->startY=m_tracker.m_rect.top;
				pObject->endX=m_tracker.m_rect.right;
				pObject->endY=m_tracker.m_rect.bottom;
			}
			pObject->Draw(pDC);
			if (pObject->bIsSelected)
			{
				m_tracker.Draw(pDC); 
			}
		}
	}
}

/////////////////////////////////////////////////////////////////////////////
// CMyDrawView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CMyDrawView message handlers

void CMyDrawView::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	POSITION pos = m_ObjectList.GetHeadPosition();
	CDrawElement* pHitItem;
	while(pos != NULL)
	{
		pHitItem=(CDrawElement*)m_ObjectList.GetNext(pos);
		if(pHitItem != NULL)
		{
			CRect rc;
			rc.left=pHitItem->startX;
			rc.top=pHitItem->startY;
			rc.right=pHitItem->endX;
			rc.bottom=pHitItem->endY;
			if (rc.PtInRect(point))
			{
				ClearSelection();
				pHitItem->bIsSelected=true; 
				m_tracker.m_rect.SetRect(pHitItem->startX,pHitItem->startY,
					pHitItem->endX,pHitItem->endY);  
			}
			else
			{
				pHitItem->bIsSelected=false; 
			}
		}
	}
	m_tracker.Track(this,point);
	Invalidate();
}

BOOL CMyDrawView::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message) 
{
	// TODO: Add your message handler code here and/or call default
	if(m_tracker.SetCursor(pWnd,nHitTest)) 
		return true;
	return CView::OnSetCursor(pWnd, nHitTest, message);
}

void CMyDrawView::ClearSelection()
{
	CDrawElement* pHitItem=NULL;
	POSITION pos = m_ObjectList.GetHeadPosition();
	
	while(pos != NULL)
	{
		pHitItem=(CDrawElement*)m_ObjectList.GetNext(pos);
		if(pHitItem != NULL)
		{
			pHitItem->bIsSelected=false; 
		}
	}
	return;
}

void CMyDrawView::OnLButtonDblClk(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	POSITION pos = m_ObjectList.GetHeadPosition();
	CDrawElement* pHitItem;
	while(pos != NULL)
	{
		pHitItem=(CDrawElement*)m_ObjectList.GetNext(pos);
		if(pHitItem != NULL)
		{
			if (pHitItem->bIsSelected) 
			{
				pHitItem->ShowProperties(); 
				Invalidate();
				break;
			}
		}
	}
	CView::OnLButtonDblClk(nFlags, point);
}

void CMyDrawView::OnButtonLine() 
{
	// TODO: Add your command handler code here
	CLine* pLine=new CLine;
	m_ObjectList.AddTail(pLine); 
	Invalidate();
}

void CMyDrawView::OnButtonEllipse() 
{
	// TODO: Add your command handler code here
	CEllipse* pEllipse=new CEllipse;
	m_ObjectList.AddTail(pEllipse); 
	Invalidate();
}

void CMyDrawView::OnButtonRectangle() 
{
	// TODO: Add your command handler code here
	CRectangle* pRectangle=new CRectangle;
	m_ObjectList.AddTail(pRectangle); 
	Invalidate();
}

void CMyDrawView::OnButtonArc() 
{
	// TODO: Add your command handler code here
	CArc* pArc=new CArc;
	srand(::GetTickCount());
	if(rand()%10+1>5)//产生一个1到10的随机数
		pArc->Direction=0;
	else
		pArc->Direction=1;
	m_ObjectList.AddTail(pArc); 
	Invalidate();
}

void CMyDrawView::OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags) 
{
	// TODO: Add your message handler code here and/or call default
	if (46==nChar)
	{
		POSITION pos = m_ObjectList.GetTailPosition();
		CDrawElement* pHitItem;
		while(pos != NULL)
		{
			POSITION curpos=pos;
			pHitItem=(CDrawElement*)m_ObjectList.GetPrev(pos);
			if(pHitItem != NULL)
			{
				if (pHitItem->bIsSelected)
				{
					m_ObjectList.RemoveAt(curpos);
					Invalidate();
					break;
				}
			}
		}
	}
	CView::OnKeyUp(nChar, nRepCnt, nFlags);
}

void CMyDrawView::OnButtonText() 
{
	// TODO: Add your command handler code here
	CText* pText=new CText;
	m_ObjectList.AddTail(pText); 
	Invalidate();
}