drawpictureview.cpp

能够完成画直线

// DrawPictureView.cpp : implementation of the CDrawPictureView class
//

#include "stdafx.h"
#include "DrawPicture.h"

#include "DrawPictureDoc.h"
#include "DrawPictureView.h"

#include "SettingProperty.h"
#include "resource.h"

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

/////////////////////////////////////////////////////////////////////////////
// CDrawPictureView

IMPLEMENT_DYNCREATE(CDrawPictureView, CView)

BEGIN_MESSAGE_MAP(CDrawPictureView, CView)
	ON_WM_CONTEXTMENU()
	//{{AFX_MSG_MAP(CDrawPictureView)
	ON_COMMAND(ID_MENUITEM32776, OnSettingProperty)
	ON_COMMAND(ID_MENUITEM32771, OnDrawLine)
	ON_COMMAND(ID_MENUITEM32772, OnDrawRectangle)
	ON_COMMAND(ID_MENUITEM32773, OnDrawRRectangle)
	ON_COMMAND(ID_MENUITEM32774, OnDrawEllipse)
	ON_COMMAND(ID_MENUITEM32775, OnDrawCopyPencil)
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONUP()
	ON_WM_MOUSEMOVE()
	ON_COMMAND(ID_MENUITEM32785, OnDrawREllipse)
	ON_WM_CREATE()
	ON_COMMAND(ID_MENUITEM32792, OnDrawPolygen)
	ON_WM_LBUTTONDBLCLK()
	ON_WM_RBUTTONDOWN()
	ON_COMMAND(ID_MENUITEM32799, OnDrawBezier)
	ON_COMMAND(ID_MENUITEM32800, OnRefresh)
	//}}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()

/////////////////////////////////////////////////////////////////////////////
// CDrawPictureView construction/destruction

CDrawPictureView::CDrawPictureView()
{
	// TODO: add construction code here
	m_ptOrigin	=m_ptEnd=0;
	m_bDraw		=FALSE;
	m_uLineWidth=1;
	m_nLineStyle=PS_SOLID;
	m_color		=RGB(0,0,0);
	m_nDrawType	=0;
	m_bDrawPencil=FALSE;
	m_bDrawPolygen=FALSE;
	m_pointNumber=0;
}

CDrawPictureView::~CDrawPictureView()
{
}

BOOL CDrawPictureView::PreCreateWindow(CREATESTRUCT& cs)
{
	// TODO: Modify the Window class or styles here by modifying
	//  the CREATESTRUCT cs
//	cs.lpszClass=AfxRegisterWndClass(CS_HREDRAW|CS_VREDRAW,LoadCursor(NULL,IDC_CROSS),(HBRUSH)GetStockObject(WHITE_BRUSH),0);

	return CView::PreCreateWindow(cs);
}

/////////////////////////////////////////////////////////////////////////////
// CDrawPictureView drawing

void CDrawPictureView::OnDraw(CDC* pDC)
{
	CDrawPictureDoc* pDoc = GetDocument();
	ASSERT_VALID(pDoc);
	// TODO: add draw code for native data here
	pDC->TextOut(10,20,(_T("画图时可选择画图类型和属性 ;")));
	pDC->TextOut(10,40,(_T("菜单栏, 工具栏, 鼠标右键均可选择 !")));
	
	m_nDrawType=1;
}

/////////////////////////////////////////////////////////////////////////////
// CDrawPictureView printing

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CDrawPictureView diagnostics

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

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

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

/////////////////////////////////////////////////////////////////////////////
// CDrawPictureView message handlers

//主要的画图程序
void CDrawPictureView::DrawPicture(CDC * pDC, int nPictureShape, CPoint ptOrigin, CPoint ptEnd)
{
	CPen		pen(m_nLineStyle,m_uLineWidth,m_color);
	CPen	*	OldPen=pDC->SelectObject(&pen);
	CBrush	*	pBrush=CBrush::FromHandle((HBRUSH)GetStockObject(NULL_BRUSH));
	CBrush	*	pOldBrush=pDC->SelectObject(pBrush);

	switch(nPictureShape)
	{
		case 1:
			//画直线
			pDC->MoveTo(ptOrigin);
			pDC->LineTo(ptEnd);
			break;
		case 2:
			//画矩形
			pDC->Rectangle(CRect(ptOrigin,ptEnd));
			break;
		case 3:
			//画圆角矩形
			pDC->RoundRect(CRect(ptOrigin,ptEnd),CPoint(20,20));
			break;
		case 4:
			//画椭圆
			pDC->Ellipse(CRect(ptOrigin,ptEnd));
			break;
		case 5:
			//画圆
			if(abs(ptEnd.y-ptOrigin.y)>abs(ptEnd.x-ptOrigin.x))
			{
				ptEnd.y=ptOrigin.y+ptEnd.x-ptOrigin.x;
			}
			else
			{
				ptEnd.x=ptOrigin.x+ptEnd.y-ptOrigin.y;
			}
			pDC->Ellipse(CRect(ptOrigin,ptEnd));
			break;
	}
	pDC->SelectObject(OldPen);
	pDC->SelectObject(pOldBrush);
}

//设置线的属性
void CDrawPictureView::OnSettingProperty() 
{
	// TODO: Add your command handler code here
	CSettingProperty	proDlg;

	proDlg.m_nLineStyle=m_nLineStyle;
	proDlg.m_uLineWidth=m_uLineWidth;
	proDlg.m_crColor=m_color;
	if(IDOK==proDlg.DoModal())
	{
		m_nLineStyle=proDlg.m_nLineStyle;
		m_uLineWidth=proDlg.m_uLineWidth;
		m_color=proDlg.m_crColor;
	}
}

//画直线
void CDrawPictureView::OnDrawLine() 
{
	// TODO: Add your command handler code here
	m_nDrawType=1;
	m_bDrawPencil=false;
}

//画矩形
void CDrawPictureView::OnDrawRectangle() 
{
	// TODO: Add your command handler code here
	m_nDrawType=2;
	m_bDrawPencil=false;
}

//画圆角矩形
void CDrawPictureView::OnDrawRRectangle() 
{
	// TODO: Add your command handler code here
	m_nDrawType=3;
	m_bDrawPencil=false;
}

//画椭圆
void CDrawPictureView::OnDrawEllipse() 
{
	// TODO: Add your command handler code here
	m_nDrawType=4;
	m_bDrawPencil=false;
}

//画圆
void CDrawPictureView::OnDrawREllipse() 
{
	// TODO: Add your command handler code here
	m_nDrawType=5;
	m_bDrawPencil=false;
}

//仿铅笔
void CDrawPictureView::OnDrawCopyPencil() 
{
	// TODO: Add your command handler code here
	m_nDrawType=6;
	m_bDrawPencil=true;
}

//鼠标左键按下，捕捉起始点的位置
void CDrawPictureView::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	if(m_nDrawType!=0)
	{
		m_ptOrigin=m_ptEnd=point;
		m_bDraw=true;
		if (m_nDrawType==7)
		{	
			m_pointArray[m_pointNumber]=point;
			m_pointNumber++;

			if (m_bDrawPolygen==FALSE)
			{
				m_firstPoint=point;
				m_bDrawPolygen=TRUE;
			}	
			m_bDraw=FALSE;
		}
	}
	else
	{
		MessageBox(_T("请选择画图的类型 ！"));
	}
	
	CView::OnLButtonDown(nFlags, point);
}

//鼠标左键弹起，画出最终的图形
void CDrawPictureView::OnLButtonUp(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	if(true==m_bDraw)
	{
		m_bDraw=false; 
		CClientDC   dc(this);
//		if(m_nDrawType!=7)
//			DrawPicture(&dc,m_nDrawType,m_ptOrigin,m_ptEnd);
	}
	
	CView::OnLButtonUp(nFlags, point);
}

//响应鼠标移动的消息，并实时显示图形
void CDrawPictureView::OnMouseMove(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	CClientDC	dc(this);

	if(true==m_bDraw)
	{
		if(true==m_bDrawPencil)
		{
			CPen		pen(m_nLineStyle,m_uLineWidth,m_color);
			CPen	*	OldPen=dc.SelectObject(&pen);
			CBrush	*	pBrush=CBrush::FromHandle((HBRUSH)GetStockObject(NULL_BRUSH));
			CBrush	*	pOldBrush=dc.SelectObject(pBrush);

			dc.MoveTo(m_ptOrigin);
			dc.LineTo(point);
			m_ptOrigin=point;

			dc.SelectObject(OldPen);
			dc.SelectObject(pOldBrush);
		}
		else
		{
			int drawMode=dc.GetROP2();		//原有绘图模式
			dc.SetROP2(R2_NOTXORPEN);		//设置当前绘图模式

			DrawPicture(&dc,m_nDrawType,m_ptOrigin,m_ptEnd);
				
			//重新绘线
			m_ptEnd=point;	
			DrawPicture(&dc,m_nDrawType,m_ptOrigin,m_ptEnd);

			dc.SetROP2(drawMode);			//恢复绘图模式
		}		
	}
	if (m_nDrawType==7&&m_bDrawPolygen==TRUE)
	{
		CPen		pen(m_nLineStyle,m_uLineWidth,m_color);
		CPen	*	OldPen=dc.SelectObject(&pen);
		
		int drawMode=dc.GetROP2();	//原有绘图模式
		dc.SetROP2(R2_NOTXORPEN);	//设置当前绘图模式
		dc.MoveTo(m_ptOrigin);		//
		dc.LineTo(m_ptEnd);			//上次鼠标移动到临时终点位置的临时线
		
		m_ptEnd=point;				//为临时终点赋值当前坐标值
		dc.MoveTo(m_ptOrigin);
		dc.LineTo(m_ptEnd);			//这两行代码为从直线起点到直线终点画一条直线
		dc.SetROP2(drawMode);		//恢复绘图模式
		dc.SelectObject(OldPen);
	}
	
	CView::OnMouseMove(nFlags, point);
}


void CDrawPictureView::OnContextMenu(CWnd*, CPoint point)
{

	// CG: This block was added by the Pop-up Menu component
	{
		if (point.x == -1 && point.y == -1){
			//keystroke invocation
			CRect rect;
			GetClientRect(rect);
			ClientToScreen(rect);

			point = rect.TopLeft();
			point.Offset(5, 5);
		}

		CMenu menu;
		VERIFY(menu.LoadMenu(CG_IDR_POPUP_DRAW_PICTURE_VIEW));

		CMenu* pPopup = menu.GetSubMenu(0);
		ASSERT(pPopup != NULL);
		CWnd* pWndPopupOwner = this;

		while (pWndPopupOwner->GetStyle() & WS_CHILD)
			pWndPopupOwner = pWndPopupOwner->GetParent();

		pPopup->TrackPopupMenu(TPM_LEFTALIGN | TPM_RIGHTBUTTON, point.x, point.y,
			pWndPopupOwner);
	}
}

int CDrawPictureView::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CView::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	// TODO: Add your specialized creation code here
	SetClassLong(m_hWnd,GCL_HCURSOR,(LONG)LoadCursor(NULL,IDC_CROSS));
	
	return 0;
}

void CDrawPictureView::OnDrawPolygen() 
{
	// TODO: Add your command handler code here
	if (m_pointNumber==0)
	{
//		Invalidate();
	}
	m_nDrawType=7;
	m_bDrawPencil=false;
}

void CDrawPictureView::OnLButtonDblClk(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	if (m_nDrawType==7)
	{
		m_bDrawPolygen=false;
		CClientDC dc(this);
		CPen pen(m_nLineStyle,m_uLineWidth,m_color);
		CPen * OldPen=dc.SelectObject(&pen);
		dc.MoveTo(m_firstPoint);
		dc.LineTo(point);
		dc.SelectObject(OldPen);
	}
	
	CView::OnLButtonDblClk(nFlags, point);
}

void CDrawPictureView::OnRButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	
	CView::OnRButtonDown(nFlags, point);
}

void CDrawPictureView::OnDrawBezier() 
{
	// TODO: Add your command handler code here
	CClientDC dc(this);
	CPen		pen(m_nLineStyle,m_uLineWidth,RGB(255,0,0));
	CPen	*	OldPen=dc.SelectObject(&pen);

	dc.PolyBezierTo(m_pointArray,m_pointNumber);
	for (int i=0; i<m_pointNumber; i++)
	{
		m_pointArray[i]=0;
	}
	m_pointNumber=0;

	dc.SelectObject(OldPen);
}

void CDrawPictureView::OnRefresh() 
{
	// TODO: Add your command handler code here
	Invalidate();
}