browsevw.cpp

mfc internals 源码 mfc internals 源码

// browsevw.cpp : implementation of the CDBaseBrowserView class
//

// This is a part of the Objective Grid C++ Library.
// Copyright (C) 1995 ClassWorks, Stefan Hoenig.
// All rights reserved.
//
// This source code is only intended as a supplement to
// the Objective Grid Classes Reference and related
// electronic documentation provided with the library.
// See these sources for detailed information regarding
// the Objective Grid product.
//

#include "stdafx.h"
#include "gridapp.h"
#include "browsevw.h"
#include <limits.h>

#ifdef _DEBUG
#undef THIS_FILE
static char BASED_CODE THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CDBaseBrowserView

IMPLEMENT_DYNCREATE(CDBaseBrowserView, CMyGridView)

CDBaseBrowserView::CDBaseBrowserView()
{
}

CDBaseBrowserView::~CDBaseBrowserView()
{
}


BEGIN_MESSAGE_MAP(CDBaseBrowserView, CMyGridView)
	//{{AFX_MSG_MAP(CDBaseBrowserView)
		// NOTE - the ClassWizard will add and remove mapping macros here.
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()


/////////////////////////////////////////////////////////////////////////////
// CDBaseBrowserView diagnostics

#ifdef _DEBUG
void CDBaseBrowserView::AssertValid() const
{
	CMyGridView::AssertValid();
}

void CDBaseBrowserView::Dump(CDumpContext& dc) const
{
	CMyGridView::Dump(dc);
}
#endif //_DEBUG

/////////////////////////////////////////////////////////////////////////////
// CDBaseBrowserView message handlers

void CDBaseBrowserView::OnInitialUpdate()
{
	BOOL bNew = (GetParam() == NULL);

	// Link grid to document,
	SetParam(&GetDocument()->m_param, FALSE /* do not destroy*/);

	CMyGridView::OnInitialUpdate();

	EnableHints(TRUE);  // I have several views connected with one doc
}

// Bind gridview to DBase file
ROWCOL CDBaseBrowserView::GetRowCount()
{
	return GetDocument()->m_dbfile.nRecordCount;
}

ROWCOL CDBaseBrowserView::GetColCount()
{
	return GetDocument()->m_dbfile.nFieldCount;
}

CField* CDBaseBrowserView::GetField(ROWCOL nCol)
{
	return GetDocument()->m_dbfile.GetField(GetFieldId(nCol));
}

int CDBaseBrowserView::GetFieldId(ROWCOL nCol)
{
	ASSERT(nCol >= 1 && nCol <= INT_MAX);
	long nField = -1;

	GetDocument()->m_columnIdMap.Lookup(nCol, nField);
	return (int) (nField);
}

BOOL CDBaseBrowserView::GetStyleRowCol(ROWCOL nRow, ROWCOL nCol, CGXStyle& style, GXModifyType mt, int nType)
{
	if (mt == gxRemove) // not supported
		return FALSE;

	// Note: I do not distinct between gxApplyNew, gxCopy and gxOverride

	ASSERT(nRow <= LONG_MAX);
	long nRecord = (long) nRow;

	if (nType == -1)
	{
		// here you can return the style for a complete row, column or table
		return FALSE;
	}
	else if (nRow == 0 && nCol == 0)
	{
		// style for the top-left button
		return FALSE;
	}
	else if (nRow == 0)
	{
		// Column headers
		 style.SetValue(GetField(nCol)->name);
	}
	else if (GetDocument()->m_dbfile.Seek(nRecord-1))
	{
		if (nCol == 0)
		{
			// Row headers
			char sz[20];
			wsprintf(sz, "%5lu%c", nRow, GetDocument()->m_dbfile.IsDeleted() ? '*' : ' ');
			style.SetValue(sz);
		}
		else
		{
			// Cell value
			CString s;
			CField* fld = GetField(nCol);
			GetDocument()->m_dbfile.GetValue(GetFieldId(nCol), s);

			style
				.SetValue(s)
				.SetMaxLength(fld->len);

			switch (fld->type)
			{
			case 'N':   style.SetBaseStyle(GetDocument()->m_wStyleNumeric); break;
			case 'C':   style.SetBaseStyle(GetDocument()->m_wStyleText); break;
			case 'D':   style.SetBaseStyle(GetDocument()->m_wStyleDate); break;
			case 'L':   style.SetBaseStyle(GetDocument()->m_wStyleLogical); break;
			}
		}
		return TRUE;
	}

	// unreferenced:
	mt;

	return FALSE;
}

BOOL CDBaseBrowserView::StoreStyleRowCol(ROWCOL nRow, ROWCOL nCol, const CGXStyle* pStyle, GXModifyType mt, int nType)
{
	if (mt == gxRemove) // not supported
		return FALSE;

	// Note: I do not distinct between gxApplyNew, gxCopy and gxOverride

	ASSERT(nRow <= LONG_MAX);
	long nRecord = (long) nRow;

	if (nType == -1)
	{
		// here you could store the style for a complete row, column or table
		return FALSE;
	}
	else if (nRow == 0 && nCol == 0)
	{
		// style for the top-left button
		return FALSE;
	}
	else if (nRow == 0)
	{
		// Column headers
		return FALSE;
	}
	else if (GetDocument()->m_dbfile.Seek(nRecord-1))
	{
		if (nCol == 0)
		{
			// Row headers
			return FALSE;
		}
		else
		{
			// Cell value
			if (pStyle->GetIncludeValue())
				GetDocument()->m_dbfile.SetValue(GetFieldId(nCol), pStyle->GetValue());

			SetModifiedFlag();
			return TRUE;
		}
	}

	// unreferenced:
	mt;

	return FALSE;
}

int CDBaseBrowserView::GetColWidth(ROWCOL nCol)
{
	ASSERT(nCol <= INT_MAX);

	if (nCol > 0)
	{
		// GX_NXAVGWIDTH is average logical width of a char
		// Width_LPtoDP converts from logical to pixel value
		if (IsColHidden(nCol))
			return 0;
		else
			return Width_LPtoDP( GetField(nCol)->width * GX_NXAVGWIDTH);
	}

	return CMyGridView::GetColWidth(nCol);
}

BOOL CDBaseBrowserView::StoreColWidth(ROWCOL nCol, int nWidth)
{
	ASSERT(nCol <= INT_MAX);

	if (nCol > 0)
	{
		// GX_NXAVGWIDTH is average logical width of a char
		// Width_DPtoLP converts from pixel to logical value
		GetField(nCol)->width = (short) (Width_DPtoLP(nWidth) / GX_NXAVGWIDTH);

		SetModifiedFlag();

		return TRUE;
	}

	return CMyGridView::StoreColWidth(nCol, nWidth);
}

BOOL CDBaseBrowserView::StoreMoveCols(ROWCOL nFromCol, ROWCOL nToCol, ROWCOL nDestCol, BOOL bProcessed)
{
	GetDocument()->m_columnIdMap.Move(nFromCol, nToCol, nDestCol);

	SetModifiedFlag();

	return CMyGridView::StoreMoveCols(nFromCol, nToCol, nDestCol, bProcessed = TRUE);
}