A fast and lightweight cell control

// MyCell - version 1.0
// Written by Yanxueming <yanxm2003@hotmail.com>
// Copyright (C) 2006-2006
// All rights reserved.
//
// The code and information is provided "as-is" without
// warranty of any kind, either expressed or implied.
#include "stdafx.h"
#include "../include/base.h"
#include "../include/EditImp.h"
#include "../include/GridBase.h"
#include "../include/InPlaceEdit.h"
#include <atltypes.h>
#pragma comment(lib,"Imm32.lib")
#pragma message( "Auto load Imm32.lib " __FILE__ )


namespace mycell{
	//LRESULT EditImpl::OnEndInPlaceEdit(int, LPNMHDR lpnm,BOOL& bHandled)
	//LRESULT OnEndInPlaceEdit(int row,int col,LPCSTR lpszText)
	//{
	//	// In case OnEndInPlaceEdit called as window is being destroyed
	//	if (!pGrid_->IsWindow())
	//		return 1;
	//	//HWND const hListener=pGrid_->put_listener(NULL);
	//	//NM_GRIDVIEW* disp=(NM_GRIDVIEW*)lpnm;
	//	//LPCSTR lpszText=(LPCSTR)disp->lParam;
	//	TCHAR szCurText[MAX_CELLTEXT];
	//	int len=pGrid_->GetCellText(disp->row,disp->col,szCurText);
	//	//pGrid_->put_listener(hListener);
	//	if (!szCurText || !lpszText || 0!=_tcsnccmp(lpszText,szCurText,len))
	//	{
	//		pGrid_->SendMessageToListener(disp->row,disp->col,OCN_ENDCELLEDIT,(LPARAM)lpszText);
	//	}
	//	return 1;
	//}
	//void EditImpl::OnEndEditCell(int row, int col,LPCSTR lpszText)
	//{
	//	TCHAR szCurText[MAX_CELLTEXT];
	//	int len=pGrid_->GetCellText(row,col,szCurText);
	//	if (!szCurText || !lpszText || 0!=_tcsnccmp(lpszText,szCurText,len))
	//	{
	//		pGrid_->SendMessageToListener(row,col,OCN_ENDLABELEDIT,(LPARAM)lpszText);
	//	}
	//}
	LRESULT EditImpl::OnImeComposition(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
	{
		bHandled=FALSE;
	#define MyError(x) 
		if(lParam & GCS_RESULTSTR)
		{
 			HIMC hIMC = ::ImmGetContext(pGrid_->m_hWnd);

			if (!hIMC)
				;//MyError(ERROR_NULLCONTEXT);

			// Get the size of the result string.
			DWORD dwSize = ImmGetCompositionString(hIMC, GCS_RESULTSTR, NULL, 0);

			// increase buffer size for NULL terminator, 
			//   maybe it is in UNICODE
			dwSize += sizeof(WCHAR);

			HGLOBAL hstr = GlobalAlloc(GHND,dwSize);
			if (hstr == NULL)
				MyError(ERROR_GLOBALALLOC);

			LPSTR lpstr = (LPSTR)GlobalLock(hstr);
			if (lpstr == NULL)
				MyError(ERROR_GLOBALLOCK);

			// Get the result strings that is generated by IME into lpstr.
			ImmGetCompositionString(hIMC, GCS_RESULTSTR, lpstr, dwSize);
			ImmReleaseContext(pGrid_->m_hWnd, hIMC);

			// add this string into text buffer of application
			//int ActiveRow=0,ActiveCol=0;
			//GetActiveCell(&ActiveRow,&ActiveCol);
			CellID const activeCell=pGrid_->get_ActiveCell();
			OnEditCell(activeCell.row,activeCell.col,lpstr);
			GlobalUnlock(hstr);
			GlobalFree(hstr);
		}
		return 0;
	}
	LRESULT EditImpl::OnChar(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled)
	{
		bHandled=FALSE;
		UINT nChar=(UINT)wParam;
		if(nChar < 0x20) return 0;//control chars
		if(nChar >= 0x80)//When entering DBCS chars into cells
			return 0;
		eMouseMode const emm=pGrid_->get_MouseMode();
		if (!IsCTRLpressed() && emm == MOUSE_NOTHING && nChar != VK_ESCAPE)
		{
			BOOL const bHandleTabKey=pGrid_->get_HandleTabKey();
			if (!bHandleTabKey || (bHandleTabKey && nChar != VK_TAB))
			{
				CellID const activeCell=pGrid_->get_ActiveCell();
				OnEditCell(activeCell.row,activeCell.col, nChar);
			}
		}
		return DefWindowProc(pGrid_->m_hWnd,uMsg,wParam,lParam);
	}
	void EditImpl::OnEditCell(int row, int col,LPCSTR lpszInit)
	{
		_ASSERT(row>=0);
		_ASSERT(col>=0);
		CRect rect;
		VisibleMergeCellMgr& vmc=pGrid_->GetVisibleMergeCellMgr();
		MergeCells* pMergeCells=vmc.GetMergeCells(row,col);
		if(pMergeCells){
			row=pMergeCells->first.row;
			col=pMergeCells->first.col;
			pGrid_->EnsureVisible(row, col);

			RECT rc=pGrid_->get_RangeRect(pMergeCells->first.row,pMergeCells->first.col,pMergeCells->second.row,pMergeCells->second.col);
			RECT rcContent;
			pGrid_->GetClientRect(&rcContent);
			pGrid_->get_ContentRect(&rcContent);
			IntersectRect(&rect,&rc,&rcContent);
		}else{
			pGrid_->EnsureVisible(row, col);
			rect=pGrid_->GetCellRect(row,col);
		}
		rect.DeflateRect(0,0,1,1);
		CellTypeConstants const tc=pGrid_->get_CellType(row,col);
		switch(tc){
			case cellEdit:	//�ı���
				{
					CInPlaceEdit* pEdit=new CInPlaceEdit(pGrid_,pGrid_->m_hWnd,rect,ES_CENTER|ES_AUTOHSCROLL,0,row,col,lpszInit);
					m_hwndInplace=pEdit->m_hWnd;
				}break;
			case cellCombo:	//������
			case cellCheck:	//��ѡ��
			case cellCalendar:	//���ڿ�
			case cellButton:		//��ť
			case cellHyperLink:	//������
			case cellDefault:	//ȱʡ����
					break;
			case cellDegree://��γ�ȱ༭��
				{
					CInPlaceEdit* pEdit=new CInPlaceEdit(pGrid_,pGrid_->m_hWnd,rect,ES_CENTER,0,row,col,lpszInit);
					m_hwndInplace=pEdit->m_hWnd;
				}break;
		}
		//SetDirty();
	}
	LRESULT EditImpl::OnLButtonDblClk(UINT,WPARAM,LPARAM lParam,BOOL& bHandled)
	{
		bHandled=FALSE;
		POINT point={GET_X_LPARAM(lParam),GET_Y_LPARAM(lParam)};// MAKEPOINTS(lParam);  // position of cursor 
		CellHitTestConstants hct;
		CellID const cell=pGrid_->HitTest(point.x,point.y,hct);
		if(cell.row<0 || cell.col<=0)
			return 0;
		eMouseMode const emm=pGrid_->get_MouseMode();
		switch(emm)
		{
		case MOUSE_NOTHING:
			{
				if (cell.row>=HEADER_ROW && cell.col>=HEADER_COL){
					OnEditCell(cell.row,cell.col, VK_LBUTTON);
				}/*else if (get_ListMode()){
					if (!IsValid(MouseRow,MouseCol)) return 0;
					if (MouseRow >= iFixedRowCount && MouseCol < iFixedColumnCount)
						OnEditCell(MouseRow,MouseCol, VK_LBUTTON);
				}
				*/

				CellTypeConstants const tc=pGrid_->get_CellType(cell.row,cell.col);
				if(cellOwnerDraw==tc || cellDefault==tc){
					pGrid_->SendMessageToListener(cell.row,cell.col,OCN_LBUTTONDBLCLK,0);
				}
			}
		}
		return 0;
	}
	LRESULT EditImpl::OnLButtonDown(UINT,WPARAM,LPARAM lParam,BOOL& bHandled)
	{
		bHandled=FALSE;
		POINT const point={LOWORD(lParam),HIWORD(lParam)};

		CellHitTestConstants hct;
		CellID const cell=pGrid_->HitTest(point.x,point.y,hct);
		if(cell.row<0 || cell.col<0)
			return 0;

		CRect rcCell=pGrid_->GetCellRect(cell.row,cell.col);
		CPoint _pt=rcCell.CenterPoint();
		int cx=rcCell.Width(); 
		if(rcCell.Height()<cx) 
			cx=rcCell.Height();
		cx=(cx-4)>>1;
		rcCell.SetRect(_pt.x-cx,_pt.y-cx,_pt.x+cx,_pt.y+cx);
		if(!rcCell.PtInRect(point)) 
			return 0;

		CellTypeConstants const cellType=pGrid_->get_CellType(cell.row,cell.col);
		switch(cellType)
		{
		case cellCheck:
			{
				TCHAR szText[MAX_CELLTEXT];
				szText[0]=_T('\0');
				pGrid_->GetCellText(cell.row,cell.col,szText);
				BOOL const bCheck=0!=lstrcmp(szText,_T("0"));
				CellRange cr=pGrid_->get_Selection();
				if(cr.first.row<0) cr.first.row=0;
				if(cr.first.col<0) cr.first.col=0;
				if(cell.row>=cr.first.row && cell.row<=cr.second.row
					&& cell.col>=cr.first.col && cell.col<=cr.second.col)
				{
					for(int ir=cr.first.row;ir<=cr.second.row;++ir){
						for(int ic=cr.first.col;ic<=cr.second.col;++ic)
						{
							if(cellCheck==pGrid_->get_CellType(ir,ic)){
								CheckCell(ir,ic,bCheck);
							}
						}
					}
					bHandled=TRUE;
				}else{
					CheckCell(cell.row,cell.col,bCheck);
				}
				RECT rcSel=pGrid_->get_RangeRect(cr.first.row,cr.first.col,cr.second.row,cr.second.col);
				RECT rcContent;
				pGrid_->GetClientRect(&rcContent);
				RECT rc;
				IntersectRect(&rc,&rcContent,&rcSel);
				pGrid_->InvalidateRect(&rc,FALSE);
				pGrid_->UpdateWindow();
			}break;
		}
		return 0;
	}
	void EditImpl::CheckCell(long row,long col,BOOL bCheck)
	{
		if(row>0){
			LPCTSTR str=bCheck?_T("0"):_T("1");
			pGrid_->SendMessageToListener(row,col,OCN_ENDCELLEDIT,(LPARAM)str);
		}
	}
}//namespace