ghrow.cpp

来自「VC开发环境下」· C++ 代码 · 共 89 行

// GHRow.cpp : Implementation of CGHRow

#include "stdafx.h"
#include "GHRow.h"
#include ".\ghrow.h"


// CGHRow


STDMETHODIMP CGHRow::get_Value(LONG lIndex, FLOAT* pVal)
{
	ATLASSERT(lIndex>=0&&lIndex<m_SwatchData->get_Count()); //Index out of range

	*pVal=m_SwatchData->get_Value(lIndex);
	return S_OK;
}

STDMETHODIMP CGHRow::put_Value(LONG lIndex, FLOAT newVal)
{
	ATLASSERT(!m_bReadOnly); //Use read-only cursor to modify 
	ATLASSERT(lIndex>=0&&lIndex<m_SwatchData->get_Count()); //Index out of range

	/*if (m_bReadOnly) 
	return E_FAIL;*/

	m_SwatchData->set_Value(lIndex,newVal);

	return S_OK;
}


HRESULT CGHRow::Initial(CSwatchData *pSwatchData)
{
	if (pSwatchData==NULL) 
		return E_POINTER;
	
    m_SwatchData=pSwatchData;

	ATLASSERT(m_pGHSwatch!=NULL);

	m_bRequireDelete=FALSE;

	return S_OK;
}

HRESULT CGHRow::InitialOnce(CComObject<CGHSwatch> *pGHSwatch,BOOL bReadOnly /* = TRUE */)
{
	if(pGHSwatch==NULL)
		return E_POINTER;

	if(m_pGHSwatch)
	{
		m_pGHSwatch->Release();
		m_pGHSwatch=NULL;
	}

	m_pGHSwatch=pGHSwatch;
	m_pGHSwatch->AddRef();

	m_bReadOnly=bReadOnly;

	return S_OK;
}

HRESULT CGHRow::CreateNewSwatchData(LONG lSize)
{
	if (m_bRequireDelete&&m_SwatchData) 
		delete m_SwatchData;

	m_bRequireDelete=TRUE;
	m_SwatchData=new CSwatchData(lSize);

	m_bReadOnly=FALSE;

	return S_OK;
}

//Delegated the life cycle of m_SwatchData
CSwatchData* CGHRow::Detch()
{
	CSwatchData *pTemp=m_SwatchData;
	
	m_SwatchData=NULL;
	m_bRequireDelete=FALSE;

	return pTemp;
}