A fast and lightweight cell control

/* -------------------------------------------------------------------------
//MyCell Library - MyCell version 1.0
//
// This file is a part of the MyCell Library.
// The use and distribution terms for this software are covered by the
// Common Public License 1.0 (http://opensource.org/licenses/cpl.php)
// which can be found in the file CPL.txt at this distribution. By using
// this software in any fashion, you are agreeing to be bound by the terms
// of this license. You must not remove this notice, or any other, from
// this software.
//
// Creator: yanxueming
// Email: xueming.yan@gmail.com
// -----------------------------------------------------------------------*/
#include "stdafx.h"
#include <atltypes.h>
//#include "../include/ToolTipImp.h"
//#include "../include/Wokd.h"
#include "../include/Workbook.h"
//using mycell::global::g_tooltip_text_buf;
namespace mycell{
	/*
	ToolTipImpl::ToolTipImpl(Worksheet* pSheet):pSheet_(pSheet),tip_(*pSheet->GetTooltipCtrl())
	{}

	void ToolTipImpl::Create(HWND hWndParent)
	{
	DWORD dwStyle = WS_POPUP;// | TTS_NOPREFIX | TTS_ALWAYSTIP;
	tip_.Create(hWndParent, CWindow::rcDefault, NULL, dwStyle);

	memset(&toolInfo_, 0, sizeof(TOOLINFO));
	toolInfo_.cbSize = sizeof(TOOLINFO);
	toolInfo_.uFlags = TTF_IDISHWND | TTF_TRACK | TTF_ABSOLUTE;
	toolInfo_.uId=(UINT)tip_.m_hWnd;
	toolInfo_.hwnd=hWndParent;
	toolInfo_.hinst = _Module.GetResourceInstance();
	tip_.AddTool(&toolInfo_);
	tip_.TrackActivate(&toolInfo_,FALSE);
	tip_.SetTipBkColor(RGB(0xcc,0xcc,0xff));
	//tip_.Activate(TRUE);
	//tip_.SetMaxTipWidth(20);
	}
	*/
	//LRESULT ToolTipImpl::OnKillFocus(UINT,WPARAM,LPARAM,BOOL& bHandled)
	//{
	//	bHandled=FALSE;
	//	//if(tip_.IsWindow())
	//	{
	//		tip_.TrackActivate(/*&toolInfo_,*/FALSE);
	//		tip_.cell.set(-100,-100);
	//	}
	//	return 0;
	//}
	//LRESULT ToolTipImpl::OnDestroy(UINT,WPARAM,LPARAM,BOOL& bHandled)
	//{
	//	bHandled=FALSE;
	//	tip_.DestroyWindow();
	//	return 0;
	//}
	//LRESULT ToolTipImpl::OnMouseMove(UINT,WPARAM,LPARAM lParam,BOOL& nHandled)
	//{
	//	return 0;
	//}
	//TCHAR g_tooltip_text_buf[MAX_CELLTEXT];
	void Worksheet::Tooltip_ChangeCellToolTip(const CELLHITTESTINFO& chi)
	{
		//nHandled=FALSE;
		pair<TOOLINFO,CToolTipCtrl>& tooltip=tooltip_;
		//CCell& tooltipCell_=tooltipCell_;
		//LPTSTR tooltipText_=pWorkbook_->Tooltip_GetTooltipText();
		bool bHideTooltip=false;
		POINT pt=chi.pt;//{GET_X_LPARAM(lParam),GET_Y_LPARAM(lParam)};
		CToolTipCtrl& tip=tooltip.second;
		TOOLINFO& toolInfo=tooltip.first;
		CRect rcCli;
		GetClientRect(rcCli);
		if(!rcCli.PtInRect(pt)){
			tip.TrackActivate(&toolInfo,FALSE);
			tooltipCell_.set(-100,-100);
			if(GetCapture()==m_hWnd)
				ReleaseCapture();
			return;
		}
		//ECellHitTestConstants hct;
		const CCellRange* pMerge=GetMergeCells(chi.cell);
		const CCell cid=pMerge?pMerge->TopLeft():chi.cell;
		//g_tooltip_cell=chi.cell;
		if(cid.row>=0 && cid.col>=0 && cid.row<get_RowHeader().get_rows() && cid.col<get_ColHeader().get_cols())
		{
			if(tip.IsWindowVisible() && cid==tooltipCell_)
				return ;

			GetCellText(cid,Workbook::tooltipText_,EGCVD_TOOLTIP);

			CClientDC dc(m_hWnd);
			const StyleDesc& style=Style_GetCellStyle(cid);
			CFont font(style.Font_GetHFont(dc));
			HFONT hOldFont=dc.SelectFont(font);
			CRect rc;
			if(pMerge){
				rc=get_RangeRect(*pMerge);
			}else
				rc=raw_GetCellRect(cid);
			CRect rcCell;
			dc.DrawText(Workbook::tooltipText_,lstrlen(Workbook::tooltipText_),&rcCell,DT_CALCRECT);

			if(rcCell.Width()>rc.Width()){			
				toolInfo.lpszText=Workbook::tooltipText_;
				tip.UpdateTipText(&toolInfo);
				ClientToScreen(&pt);
				pt.x+=10;
				pt.y+=20;
				int const cxScreen=GetSystemMetrics(SM_CXFULLSCREEN);
				int const cyScreen=GetSystemMetrics(SM_CYFULLSCREEN);
				if(pt.x+rcCell.Width()>cxScreen){
					pt.x=cxScreen-rcCell.Width()-10;
				}
				if(pt.y+rcCell.Height()>cyScreen){
					pt.y=cyScreen-rcCell.Height()-10;
				}

				tip.TrackPosition(pt.x,pt.y);
				if(!tip.GetCurrentTool(&toolInfo)){
					tip.TrackActivate(&toolInfo,TRUE);
#ifdef _DEBUG
					//CString msg;
					//msg.Format(_T(""::GetTickCount();
					AtlTrace(_T("\nTrackActivate-%d"),GetTickCount());
#endif
				}
				tooltipCell_=cid;
			}else{
				bHideTooltip=true;
			}
			dc.SelectFont(hOldFont);
		}else{
			bHideTooltip=true;
		}
		if(bHideTooltip){
			tip.TrackActivate(&toolInfo,FALSE);
			tooltipCell_.set(-100,-100);
			if(GetCapture()==m_hWnd)
				ReleaseCapture();
		}else{
			tooltipCell_=cid;
			SetCapture();
		}
	}
}//namespace mycell