supergridctrl.cpp

MiniCA V2.0版本源码。《小型CA系统V2.1含源码》发表以来

// SuperGridCtrl.cpp : implementation file
//

#include "stdafx.h"
#include "SuperGridCtrl.h"



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

/*
    SuperGrid, YALC (yet another listview control) 

	Written by me(Allan Nielsen), that is .. if the code works :)
		mailto:[e-mail]

	Copyright (c) 1999.

	If you find bugs, please notify me and I'll contact the author who wrote the darn thing :)
	
    You may use it, abuse it, redistribute it, in any way you desire, but
	if you choose to use this control in any commercial or non commercial application then please 
	send me an email letting me know, makes me :) . 
	

	HISTORY 

	what's new since last update: 

	4 dec. 1998.
	
				- MeasureItem now uses current font	
				- Combobox support in CItemInfo				
				  see the ShowList in MySuperGrid.h/cpp, PreTranslateMessage functions
				  and the file ComboInListView.cpp/h
                - function to indicate the precens of a combobox it draws a down arrow ..see DrawComboBox
				  the idea came from Robert Bouwens. :)
				- in file TestTreeDlg.cpp:  due to the MeasureItem message-reflection	
				  the listctrl is now created in the CDialog::OnCreate function and later on resized
				- LVIS_DROPHILITED support when dragging items
				- Support for LVS_EX_CHECKBOXES	  
				- Added some examples on how to print preview selected item(or at least to get some information from of the grid)
				  the sample is in the CTreeList.h/cpp which is derived from CSuperGridCtrl it shows you
				  how to initalize the grid, sort items, search for items and subitems, select and delete thems
				- added virtual GetIcon function to set your default icon handler for a listview index.
				- added virtual GetCellRGB() to set the color for current selected cell
				- renamed CTreeNode to CTreeItem, sorry ;-(
				- the nested class CTreeItem has been stripped down to nothing but simple (struct)data members
				  only servering as a linked list of lists now :-)
				- well.. moved all the importent stuff from CTreeItem to CSuperGridCtrl e.g
				  all operations on a CTreeItem now resides in the CSuperGridCtrl, much more OO-like ;-)
				- added Quicksort function
				- got rid of TheOpenCloseThing function.
				- added virtual function OnUpdateListViewItem..called when ever an Item is about to be updated
				- added virtual function OnControlLButtonDown...called when ever LButtondown in a cell
				- added virtual function CreateDragImageEx...

	11 jan 1999:
				- added SetFocus in OnDblclk and in OnLButtonDown, big thank you to Dieter Gollwitzer 
				- fixed a minor hittest error in the HitTestOnSign(), again thanks to Dieter Gollwitzer 


	16 jan 1999: 
				- added virtual OnItemExpanding(....
				- added virtual OnItemExpanded(...
				- added virtual OnCollapsing(....
				- added virtual OnItemCollapsed(...
				- added virtual OnDeleteItem(....
				- added virtual OnVKMultiply(...
				- added virtual OnVkSubTract(..
				- added virtual OnVKAdd(....
				- added SetChildrenFlag();

	1 feb 1999:
				- CItemInfo now supports individual cell-color
				- fixed some bugs in regards to listdata associated with in each cell
				- added virtual BOOL OnVkReturn(........
				- added virtual BOOL OnItemLButtonDown(.....

	4 mai 1999  - moved to Switzerland to work as a systemdeveloper for 2-3 years :).
				- new email :)
				- added new class for encapsulating drawing + - buttons.

   22.june 1999 - Added GetCount()
				- removed support for VC++ 5.0.
				- added GetTreeItem(.....) 
				- GetSelectedItem(.....)
				- Howto disable Drag/drop in CTreeList
				- level 4 compiled
				- Clean up some redudant code crap

	30.june 99  - fixed minor error in DrawItem, a drawing error occurred when 1.st column was hidden, 
				  it was previous fixed, but some how it was introduced again :).
	
	
	9. juli 99  - CRAIG SCHMIDT "the beachboy":)

				  Craig did the implementation of the Multiple Root request
				  his email are "[e-mail]" if you have any Questions
				  in regards to multiple roots implementation, although I think I can help too :).

				  he added the following functions :

				  - CTreeItem*  InsertRootItem(.....
				  - void DeleteRootItem(....
				  - BOOL IsRoot(...
				  - CTreeItem* GetRootItem(..
				  - int GetRootIndex(..
				  - int GetRootCount(...
				  - and a member variable, CPtrList m_RootItems which of course are a collection of ..ta da RootItems a.k.a CTreeItem.
				  see the file CTreeList.cpp for usage of the InsertRootItem.

   	10.juli 99    added simple wrappers for the rootitems collection

				  -	Added GetRootHeadPosition(...)
				  -	Added GetRootTailPosition();
				  -	Added CTreeItem* GetNextRoot(...
				  -	Added CTreeItem* GetPrevRoot(...


	12. juli 99  - fixed minor error in CreateDragImageEx, an error occurred when 1st column was hidden and a drag operation was initiated

	13. juli 99	 - Added void DeleteAll()...deletes all items in the grid, uhh
				 - Removed GetNextSiblingItem(...), GetPrevSiblingItem(...) due to support for multiple roots. 
				 - Added CTreeItem *GetNext(...) and CTreeItem* GetPrev(..) due to support for multiple roots.

	14. juli 99	 - Fixed a memory leak in CTreeList::HowToInsertItemsAfterTheGridHasBeenInitialized....


	
	WHAT'S UP :
				- Vacation
				- ATL VERSION COMMING UP.
				- Better documentation :)
				- Peace on earth.
				- service pack 4 for VC++ 6.0 :=|
				- Windows 3000 :)
*/

/////////////////////////////////////////////////////////////////////////////
// CSuperGridCtrl
CSuperGridCtrl::CSuperGridCtrl()
{
	m_cxImage = m_cyImage = 16;
	m_bIsDragging = m_CurSubItem = 0;
    m_nDragTarget=m_nDragItem = -1;
	m_psTreeLine.CreatePen(PS_SOLID, 1, RGB(192,192,192));
	m_psRectangle.CreatePen(PS_SOLID, 1, RGB(198,198,198));
	m_psPlusMinus.CreatePen(PS_SOLID, 1, RGB(0,0,0));
	m_brushErase.CreateSolidBrush(RGB(255,255,255));
	m_himl = NULL;
}


CSuperGridCtrl::~CSuperGridCtrl()
{
	m_psPlusMinus.DeleteObject();
	m_psRectangle.DeleteObject();
	m_psTreeLine.DeleteObject();
	m_brushErase.DeleteObject();

	while(m_RootItems.GetCount())
	{
		CTreeItem * root = (CTreeItem*)m_RootItems.RemoveHead();
		if(root!=NULL && GetData(root) != NULL)
			delete GetData(root);
		delete root;
	}
	m_RootItems.RemoveAll();
}



BEGIN_MESSAGE_MAP(CSuperGridCtrl, CListCtrl)
	//{{AFX_MSG_MAP(CSuperGridCtrl)
//	ON_NOTIFY_REFLECT(NM_DBLCLK, OnDblclk)
//	ON_NOTIFY_REFLECT(LVN_ENDLABELEDIT, OnEndlabeledit)
	ON_WM_CREATE()
	ON_WM_HSCROLL()
	ON_WM_LBUTTONDOWN()
	ON_WM_MOUSEMOVE()
	ON_WM_TIMER()
	ON_WM_VSCROLL()
	ON_WM_LBUTTONUP()
//	ON_NOTIFY_REFLECT(LVN_KEYDOWN, OnKeydown)
//	ON_NOTIFY_REFLECT(LVN_BEGINDRAG, OnBegindrag)
	ON_WM_MEASUREITEM_REFLECT()
	ON_WM_DRAWITEM_REFLECT()
	ON_WM_SYSCOLORCHANGE()
//	ON_NOTIFY_REFLECT(NM_CUSTOMDRAW, OnCustomDraw)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CSuperGridCtrl message handlers

BOOL CSuperGridCtrl::PreCreateWindow(CREATESTRUCT& cs) 
{
	cs.style |= LVS_REPORT | LVS_SINGLESEL | LVS_SHAREIMAGELISTS | LVS_OWNERDRAWFIXED | LVS_SHOWSELALWAYS;	
//	cs.dwExStyle |= LVS_EX_GRIDLINES;
	return CListCtrl::PreCreateWindow(cs);
}



int CSuperGridCtrl::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CListCtrl::OnCreate(lpCreateStruct) == -1)
		return -1;

	return 0;
}

#define OFFSET_FIRST	2 
#define OFFSET_OTHER	6
void CSuperGridCtrl::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
	if (lpDrawItemStruct->CtlType != ODT_LISTVIEW)
        return;

	if(lpDrawItemStruct->itemAction == ODA_DRAWENTIRE)
	{
		if(m_himl==NULL)
		{
			m_himl = (HIMAGELIST)::SendMessage(m_hWnd, LVM_GETIMAGELIST, (WPARAM)(int)(LVSIL_SMALL), 0L);
			if(m_himl==NULL)
				return;
		}

		LV_ITEM lvi;
		static _TCHAR szBuff[MAX_PATH];
		LPCTSTR pszText;
	
		int nItem = lpDrawItemStruct->itemID;
		CRect rcItem(lpDrawItemStruct->rcItem);

		lvi.mask = LVIF_TEXT | LVIF_IMAGE | LVIF_STATE | LVIF_INDENT | LVIF_PARAM; 
		lvi.iItem = nItem;
		lvi.iSubItem =0;
		lvi.pszText = szBuff;
		lvi.cchTextMax = sizeof(szBuff);
		lvi.stateMask = 0xFFFF;		
		GetItem(&lvi);

		CTreeItem *pSelItem = (CTreeItem*)lpDrawItemStruct->itemData;

		CRect rcLabel;
		GetItemRect(nItem, rcLabel, LVIR_LABEL);
		
		CDC* pDC = CDC::FromHandle(lpDrawItemStruct->hDC);
		ASSERT(pDC);

		CRect rcClipBox;
		pDC->GetClipBox(rcClipBox);

		COLORREF crBackground, crText;
		
		if (lpDrawItemStruct->itemState & ODS_SELECTED)
		{
			// Set the text background and foreground colors
			crBackground = GetSysColor (COLOR_HIGHLIGHT);
			crText = GetSysColor (COLOR_HIGHLIGHTTEXT);
		}
		else
		{
			// Set the text background and foreground colors to the standard window
			// colors
			crBackground = GetSysColor (COLOR_WINDOW);
			crText = GetSysColor (COLOR_WINDOWTEXT);
		}

		//Get current Icon, you have overridden this I hope :-)
/*		int iImage = GetIcon(pSelItem);
//		iImage =  4;
		if(iImage!=-1)
		{
			if(lvi.iImage!=iImage)
			{
				LV_ITEM lvItem;				
				lvItem.mask =  LVIF_IMAGE;
				lvItem.iImage = iImage;
				lvItem.iItem = nItem;
				lvItem.iSubItem = 0;
				SetItem(&lvItem);
				lvi.iImage = iImage; 
			}
		}*/

		CRect rc;
		GetItemRect(nItem, rc, LVIR_BOUNDS);

		CRect rcIcon;
		GetItemRect(nItem, rcIcon, LVIR_ICON);
		//Draw Current image
		int nOffset = (rcItem.Height() - m_cyImage)/2;
		int nY = rcItem.bottom - m_cyImage - nOffset;
		int nWidth = m_cxImage;//def icon size
		//do not draw icon out side 1.st column.
		int iTryIndent = GetIndent(pSelItem) * m_cxImage + m_cxImage;
		if(rc.left + iTryIndent  > GetColumnWidth(0)-2/*looks better -2*/)
			nWidth = (rc.left + iTryIndent) - GetColumnWidth(0);

		UINT uiFlags = ILD_TRANSPARENT;

		if( GetItemState(nItem, LVIF_STATE) & LVIS_DROPHILITED)//if dragging show a SelectDropTarget alike effect :)
			uiFlags |= ILD_BLEND50;
		
		if((nWidth=m_cxImage-nWidth) >-1)//calc width of icon
		{
			ImageList_DrawEx(m_himl, lvi.iImage, pDC->m_hDC,  
							 rc.left + (GetIndent(pSelItem) * m_cxImage), 
							 nY, 
							 nWidth,	
							 m_cyImage,
							 CLR_DEFAULT, 
							 CLR_DEFAULT, 
							 uiFlags);
			DrawTreeItem(pDC, pSelItem, nItem, rc);
		}

		//Draw selection bar (erase old selection too)
		pDC->SetBkColor(crBackground);

		CRect rcClip = lpDrawItemStruct->rcItem;
		rcClip.left += GetIndent(pSelItem) * m_cxImage + m_cxImage + 2;
		if(rcClip.left > GetColumnWidth(0))
			rcClip.left = GetColumnWidth(0);
		//fill background color
		ExtTextOut(pDC->GetSafeHdc(), 0, 0, ETO_OPAQUE, rcClip, NULL, 0, NULL);
		
		//draw color in first col if any
		rcClip.right = rcLabel.right;
		CItemInfo *pItemInfo = GetData(pSelItem);		
		COLORREF clf = pItemInfo->GetItemClr();
		if(clf!=-1)
		{	
			CBrush br(clf);
			pDC->FillRect(rcClip, &br);
		}
		//draw selection rect in 1.st col if selected
		if ((lpDrawItemStruct->itemState & ODS_SELECTED) && (m_CurSubItem==0))
		{
			CBrush br(GetCellRGB());
			pDC->FillRect(rcClip,&br);
			pDC->DrawFocusRect(rcClip);
		}

		//if checkbox style
		UINT nStateImageMask = lvi.state & LVIS_STATEIMAGEMASK;
		if (nStateImageMask)
		{
			int nImage = (nStateImageMask>>12) - 1;
			CImageList *pImageList = GetImageList(LVSIL_STATE);
			if (pImageList)
			{
				int cxIcon,cyIcon=0;
				ImageList_GetIconSize(pImageList->m_hImageList, &cxIcon, &cyIcon);
				if(rc.left + (GetIndent(pSelItem) * m_cxImage) + m_cxImage + cxIcon < GetColumnWidth(0))
					pImageList->Draw(pDC, nImage,CPoint(rc.left + (GetIndent(pSelItem) * m_cxImage) + cxIcon, nY), ILD_TRANSPARENT);
			}
		}


		//draw 1. item	
		GetItemRect(nItem, rcItem, LVIR_LABEL);
		pszText = MakeShortString(pDC, szBuff, rcItem.right - rcItem.left, 2*OFFSET_FIRST);
		rcLabel = rcItem;
		rcLabel.left+=OFFSET_FIRST;
		rcLabel.right-=OFFSET_FIRST;
		
		pDC->SetBkColor (crBackground);
		pDC->SetTextColor (crText);
		pDC->DrawText(pszText,-1, rcLabel,DT_LEFT | DT_SINGLELINE | DT_NOPREFIX | DT_VCENTER | DT_EXTERNALLEADING);

		//draw subitems..
		LV_COLUMN lvc;
		lvc.mask = LVCF_FMT | LVCF_WIDTH;
		for(int nColumn=1; GetColumn(nColumn, &lvc); nColumn++)
		{
			rcItem.left=rcItem.right;
			rcItem.right+=lvc.cx;
			if (rcItem.left < rcClipBox.right && rcItem.right > rcClipBox.left && rcItem.right > rcItem.left)
			{
				//support for colors in each cell
				COLORREF clf = pItemInfo->GetBkColor(nColumn-1);
				if(clf!=-1)
				{	
					CBrush br(clf);
					pDC->FillRect(rcItem, &br);
				}
				
				int nRetLen = GetItemText(nItem, nColumn, szBuff, sizeof(szBuff));
				if(nRetLen==0)
					pszText=NULL;
				else
					pszText=MakeShortString(pDC,szBuff,rcItem.right-rcItem.left,2*OFFSET_OTHER);

				UINT nJustify=DT_LEFT;

				if(pszText==szBuff)
				{
					switch(lvc.fmt & LVCFMT_JUSTIFYMASK)
					{
					case LVCFMT_RIGHT:
						nJustify=DT_RIGHT;
						break;
					case LVCFMT_CENTER:
						nJustify=DT_CENTER;
						break;
					default:
						break;
					}
				}
				rcLabel=rcItem;
				rcLabel.left+=OFFSET_OTHER;
				rcLabel.right-=OFFSET_OTHER;
				if (lpDrawItemStruct->itemState & ODS_SELECTED && !m_bIsDragging)
					DrawFocusCell(pDC, lpDrawItemStruct->itemID, nColumn);
				if(pszText!=NULL)
					pDC->DrawText(pszText,-1,rcLabel, nJustify | DT_SINGLELINE | DT_NOPREFIX | DT_VCENTER | DT_EXTERNALLEADING);
			}//if

			//draw down arrow if combobox regardless of rcClipBox rgn
			if (lpDrawItemStruct->itemState & ODS_SELECTED)
				DrawComboBox(pDC, pSelItem, nItem, nColumn);
		}//for
	}//ODA_DRAWENTIRE
}



void CSuperGridCtrl::DrawComboBox(CDC* pDC, CTreeItem *pSelItem, int nItem, int nColumn)
{
	CItemInfo* pInfo = GetData(pSelItem);
	CItemInfo::CONTROLTYPE ctrlType;
	if(pInfo->GetControlType(nColumn-1, ctrlType))
	{
		if(ctrlType == pInfo->CONTROLTYPE::combobox) 
		{
			CRect rect;
			GetSubItemRect(nItem, nColumn, LVIR_BOUNDS, rect);
			rect.left=rect.right - GetSystemMetrics(SM_CYVSCROLL);
			pDC->DrawFrameControl(rect, DFC_SCROLL, DFCS_SCROLLDOWN);
		}
	}
}


//this piece of code is borrowed from the wndproc.c file in the odlistvw.exe example from MSDN and was converted to mfc-style
void CSuperGridCtrl::MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct)
{
    if (lpMeasureItemStruct->CtlType != ODT_LISTVIEW)
        return;

	TEXTMETRIC tm;
	CClientDC dc(this);	
	CFont* pFont = GetFont();
	CFont* pOldFont = dc.SelectObject(pFont);	
	dc.GetTextMetrics(&tm);
	int nItemHeight = tm.tmHeight + tm.tmExternalLeading;
	lpMeasureItemStruct->itemHeight = nItemHeight + 4; //or should I go for max(nItemheight+4, m_cxImage+2);
	dc.SelectObject(pOldFont);
}



//the basic rutine making the ... thing snatched it from some tedious code example some where in MSDN call odlistvw.exe
LPCTSTR CSuperGridCtrl::MakeShortString(CDC* pDC, LPCTSTR lpszLong, int nColumnLen, int nOffset)
{
	static const _TCHAR szThreeDots[]=_T("...");

	int nStringLen=lstrlen(lpszLong);

	if(nStringLen==0 || pDC->GetTextExtent(lpszLong,nStringLen).cx + nOffset < nColumnLen)
		return(lpszLong);

	static _TCHAR szShort[MAX_PATH];

	lstrcpy(szShort,lpszLong);
	int nAddLen = pDC->GetTextExtent(szThreeDots,sizeof(szThreeDots)).cx;

	for(int i=nStringLen-1; i > 0; i--)
	{
		szShort[i]=0;
		if(pDC->GetTextExtent(szShort,i).cx + nOffset + nAddLen < nColumnLen)
			break;
	}
	lstrcat(szShort,szThreeDots);
	return(szShort);
}




/*void CSuperGridCtrl::OnKeydown(NMHDR* pNMHDR, LRESULT* pResult) 
{
	LV_KEYDOWN* pLVKeyDow = (LV_KEYDOWN*)pNMHDR;
	switch(pLVKeyDow->wVKey)
	{
		case VK_SPACE: 
			{
				if(GetExtendedStyle() & LVS_EX_CHECKBOXES)
				{	
					int nIndex = GetSelectedItem();
					if(nIndex !=-1)
					{
						CTreeItem* pItem = GetTreeItem(nIndex);
						if(pItem!=NULL)
						{
							CItemInfo *pInfo = GetData(pItem);
							pInfo->SetCheck(!pInfo->GetCheck());
						}
					}
				}
			}break;

		case VK_DELETE: 
			{