#include "StdAfx.h"
//#include "polytool.h"
#include ".\polytool.h"

#include "polyobj.h"
#include "visdrawdoc.h"
#include "visdrawview.h"

#define ZERO 10e-6

static CPolyTool polygonToolObj(polygonTool);
static CPolyTool polylineToolObj(polylineTool);

CPolyTool::CPolyTool(void)
{
}

CPolyTool::~CPolyTool(void)
{
}

CPolyTool::CPolyTool(DrawShape drawShape)
	: CDrawTool(drawShape)
{
	pObj = NULL;
}

void CPolyTool::OnLButtonDown(CVisDrawView* pView, UINT nFlags, const CPoint& point)
{	
	CPoint local = point;

	//把設備坐標轉化為邏輯坐標
	pView->ClientToDoc(local);

	//如果還沒有創建對象
	if (pObj == NULL)
	{
		//創建多邊形對象
		pObj = new CPolyObj(CRect(local, CSize(0, 0)));

		switch(m_drawShape)
		{
		default:
			break;
		case polylineTool:		//多邊線工具

			//圖元為多邊線
			pObj->m_nShape=CPolyObj::polylineshape;          
			break;

		case polygonTool:		//多邊形工具

			//圖元為多邊形
			pObj->m_nShape = CPolyObj::polygonshape;
			break;
		}

		//把對象指針添加到文檔對象指針鏈表中去
		pView->GetDocument()->Add(pObj);
	//	pObj->AddPoint(local, pView);
		
		//記錄輔助點
		nFirstPoint = point;
	}

	//如果與第一個點重合，該點不作為多邊形頂點
	else if ((local.x - pObj->m_floatpoints[0].pointx) < ZERO 
		&& (local.y - pObj->m_floatpoints[0].pointy) < ZERO) return;
	
	//把點添加到多邊形頂點數組中去
	pObj->AddPoint(local, pView);

	//記錄輔助點
	lastPoint = point;
	prePoint = point;
}

void CPolyTool::OnLButtonUp(CVisDrawView* pView, UINT nFlags, const CPoint& point)
{
}

void CPolyTool::OnMouseMove(CVisDrawView* pView, UINT nFlags, const CPoint& point)
{
	

	CPoint local = point;

	//把設備坐標轉化為邏輯坐標
	pView->ClientToDoc(local);

    if(pObj==NULL) return ;	       

	//申請與視圖窗口相關的設備描述表
	CDC* dc=pView->GetDC();

	//設置采用屏幕反色繪圖模式
  	dc->SetROP2(R2_NOT);

	switch(m_drawShape)
	{
	default:
		break;
	case polylineTool:		//多邊線工具			          
		break;

	case polygonTool:		//多邊形工具
		//刪除第一個頂點到前一個鼠標點之間的直線
		dc->MoveTo(nFirstPoint);
		dc->LineTo(prePoint);

		//畫從第一個頂點到當前鼠標點之間的直線
		dc->MoveTo(nFirstPoint);
		dc->LineTo(point);	
		break;
	}
	
	//刪除上一個頂點到前一個鼠標點之間的直線
	dc->MoveTo(lastPoint);
	dc->LineTo(prePoint);

	//畫一條從上一個頂點到當前鼠標點之間的直線
	dc->MoveTo(lastPoint);
	dc->LineTo(point);	

	//刪除設備描述表	
	pView->ReleaseDC(dc);
	
	//記錄輔助點
	prePoint=point;	
	
}

void CPolyTool::OnLButtonDblClk(CVisDrawView* pView, UINT nFlags, const CPoint& point)
{
	CPoint local = point;

	//把設備坐標轉化為邏輯坐標
	pView->ClientToDoc(local);

	//雙擊鼠標左鍵結束一個多邊形的繪制
	pObj->AddPoint(local, pView);
	pObj = NULL;

	//刷新視圖
	pView->Invalidate(TRUE);
}

void CPolyTool::CreateObj(CVisDrawView* pView, const CPoint& point)
{
	
}