drawview.cpp

C++案

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

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

#include "DrawDoc.h"
#include "DrawView.h"
#include "MainFrm.h"
#include "LineStyle.h"
#include "LineWid.h"
#include "LineColor.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_WM_CONTEXTMENU()
	ON_COMMAND(ID_DRAW_LINE, OnDrawLine)
	ON_UPDATE_COMMAND_UI(ID_DRAW_LINE, OnUpdateDrawLine)
	ON_COMMAND(ID_DRAW_POINT, OnDrawPoint)
	ON_UPDATE_COMMAND_UI(ID_DRAW_POINT, OnUpdateDrawPoint)
	ON_COMMAND(ID_DRAW_RECTANGLE, OnDrawRectangle)
	ON_UPDATE_COMMAND_UI(ID_DRAW_RECTANGLE, OnUpdateDrawRectangle)
	ON_WM_LBUTTONDOWN()
	ON_WM_MOUSEMOVE()
	ON_WM_LBUTTONUP()
	ON_WM_SETCURSOR()
	ON_COMMAND(ID_DRAG, OnDrag)
	ON_UPDATE_COMMAND_UI(ID_DRAG, OnUpdateDrag)
	ON_COMMAND(ID_SET_LINETYPE, OnSetLinetype)
	ON_COMMAND(ID_SET_LINEWIDTH, OnSetLinewidth)
	ON_COMMAND(ID_SET_COLOR, OnSetColor)
	ON_COMMAND(ID_MOVE, OnMove)
	ON_UPDATE_COMMAND_UI(ID_MOVE, OnUpdateMove)
	ON_MESSAGE(WM_MYMESSAGE,OnMyMessage)
	ON_UPDATE_COMMAND_UI(ID_SET_LINEWIDTH, OnUpdateSetLinewidth)
	//}}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
    step=0;
	start.x=0;
	start.y=0;
    end.x=0;
	end.y=0;
	m_point=FALSE;
	m_line=FALSE;
	m_rectangle=FALSE;
	drag=FALSE;
	move=FALSE;
	m_bLBtnDown=FALSE;
}

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
	CPen newpen,*oldpen;
	newpen.CreatePen(pDoc->linestyle,pDoc->linewidth,pDoc->linecolor);
	oldpen=pDC->SelectObject(&newpen);
	CBrush newbrush,*oldbrush;
	newbrush.CreateHatchBrush(pDoc->brushstyle,pDoc->linecolor);
	oldbrush=pDC->SelectObject(&newbrush);
	if (m_point)
	{
        PostMessage(WM_MYMESSAGE,0,0);
		pDC->TextOut(25,48,"程序正在画点");
	}
	if (m_line)
	{
	    pDC->TextOut(25,48,"程序正在画线");
	}
    if (m_rectangle) 
	{
	    pDC->TextOut(25,48,"程序正在画矩形");
	}
	for(int i=0;i<pDoc->pointnum;i++)
	{
		int x = pDoc->points[i][0];
		int y = pDoc->points[i][1];		
		pDC->Ellipse(x-2, y-2, x+2, y+2);
	}
	for( i=0;i<pDoc->linenum;i++)
	{
		int x1 = pDoc->line[i][0];
		int y1 = pDoc->line[i][1];
		int x2 = pDoc->line[i][2];
		int y2 = pDoc->line[i][3];	
		pDC->MoveTo(x1, y1);
		pDC->LineTo(x2, y2);
	}
	for( i=0;i<pDoc->recnum;i++)
	{
		int x1 = pDoc->rec[i][0];
		int y1 = pDoc->rec[i][1];
		int x2 = pDoc->rec[i][2];
		int y2 = pDoc->rec[i][3];	
		pDC->Rectangle(x1,y1,x2,y2);
	}
	if (move==TRUE)
	{
		pDC->Rectangle(rect0);
		pDoc->rec[selectindex][0]=rect0.left;
        pDoc->rec[selectindex][1]=rect0.top;
        pDoc->rec[selectindex][2]=rect0.right;
        pDoc->rec[selectindex][3]=rect0.bottom;
        pDoc->rec[selectindex][4]=1;
		pDoc->SetModifiedFlag();
	}
	pDC->SelectObject(oldbrush);
	pDC->SelectObject(oldpen);
	
    
}

/////////////////////////////////////////////////////////////////////////////
// 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::OnContextMenu(CWnd* pWnd, CPoint point) 
{
	// TODO: Add your message handler code here
	CMenu menu;
	menu.LoadMenu(IDR_MENU1);
	CMenu *popmenu=menu.GetSubMenu(0);
	popmenu->TrackPopupMenu(TPM_RIGHTBUTTON,point.x,point.y,this);
}

void CDrawView::OnMyMessage()
{
    CClientDC dc(this);
	dc.TextOut(25,25,"触发了自定义消息WM_MYMESSAGE");
}

void CDrawView::OnDrawLine() 
{
	// TODO: Add your command handler code here
	m_point=FALSE;
	m_line=TRUE;
	m_rectangle=FALSE;
	drag=FALSE;
	move=FALSE;
}

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

void CDrawView::OnDrawPoint() 
{
	// TODO: Add your command handler code here
	m_point=TRUE;
	m_line=FALSE;
	m_rectangle=FALSE;
	drag=FALSE;
	move=FALSE;
}

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

void CDrawView::OnDrawRectangle() 
{
	// TODO: Add your command handler code here
	m_point=FALSE;
	m_line=FALSE;
	m_rectangle=TRUE;
	drag=FALSE;
	move=FALSE;
}

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

void CDrawView::OnLButtonDown(UINT nFlags, CPoint point) 
{

	// TODO: Add your message handler code here and/or call default
    
	CDrawDoc* pDoc = GetDocument();
    if (move)
	{
		int x1=pDoc->rec[selectindex][0];
        int y1=pDoc->rec[selectindex][1];
		int x2=pDoc->rec[selectindex][2];
		int y2=pDoc->rec[selectindex][3];
		CRect rect(x1,y1,x2,y2);
		if(rect.PtInRect(point))
		{
	    	m_bLBtnDown=TRUE;
	    	movepoint=point;
		}
		if (step==0)
		{
		   step++;
		}
		else
		{
			step=0;
			move=FALSE;
		}
	}
	CClientDC dc(this);//获取设备环境
	CPen newpen(pDoc->linestyle, pDoc->linewidth, pDoc->linecolor);
	CPen * poldpen = dc.SelectObject(&newpen);//将画笔选入设备环境
	CBrush *br=CBrush::FromHandle((HBRUSH)GetStockObject(NULL_BRUSH));
	CBrush *oldBr=dc.SelectObject(br);
	if(m_point)//如果程序处于画点状态
	{
		dc.Ellipse(point.x-2, point.y-2, point.x+2, point.y+2);
		int i = pDoc->pointnum;
		pDoc->points[i][0] = point.x;  //记录点的坐标值
		pDoc->points[i][1] = point.y;
		pDoc->pointnum++;         //点数加1
		pDoc->SetModifiedFlag();    //设置文档“脏”标志
		pDoc->UpdateAllViews(this); // 重画所有视图
	}
	if(m_line)//如果程序处于画线状态
	{
		if(step == 0)//如果是线段起点，则记录起点坐标
		{
			start.x=point.x;
			start.y=point.y;
			step ++;//操作步数加1
			SetCapture();//捕捉鼠标
		}
		else//如果是线段终点，则在视图区中画出线段
		{
			dc.MoveTo(start);