#include "StdAfx.h"
#include "CColorButton.h"

CColorButton::CColorButton()
{
}

CColorButton::~CColorButton()
{
}


//从Kernal移植过来  彩色按钮
BEGIN_MESSAGE_MAP(CColorButton, CButton)
//{{AFX_MSG_MAP(CColorButton)
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
void CColorButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) 
{
	CDC dc;
	CRect rect;
	rect = lpDrawItemStruct->rcItem; 
	dc.Attach(lpDrawItemStruct->hDC);//得到绘制的设备环境CDC
	VERIFY(lpDrawItemStruct->CtlType==ODT_BUTTON);
	
	
	// 得当Button上文字,这里的步骤是:1,先得到在资源里编辑的按钮的文字,	
	//然后将此文字重新绘制到按钮上,
	//同时将此文字的背景色设为透明,这样,按钮上仅会显示文字
	
	const int bufSize = 512;
	TCHAR buffer[bufSize];
	GetWindowText(buffer, bufSize);
	
	int size=_tcslen(buffer); //得到长度
	DrawText(lpDrawItemStruct->hDC,buffer,size,&lpDrawItemStruct->rcItem,DT_CENTER|DT_VCENTER|DT_SINGLELINE|DT_TABSTOP); //绘制文字
	SetBkMode(lpDrawItemStruct->hDC,TRANSPARENT); //透明
	
	
	if (lpDrawItemStruct->itemState &ODS_SELECTED) //当按下按钮时的处理
	{
		//重绘整个控制
		CBrush brush(m_backgroudColor); 
		dc.FillRect(&(lpDrawItemStruct->rcItem),&brush);//
		
		//因为这里进行了重绘,所以文字也要重绘
		DrawText(lpDrawItemStruct->hDC,buffer,size,&lpDrawItemStruct->rcItem,DT_CENTER|DT_VCENTER|DT_SINGLELINE|DT_TABSTOP); 
		SetBkMode(lpDrawItemStruct->hDC,TRANSPARENT); 
		
		dc.Draw3dRect(&rect,RGB(0,0,0),RGB(255,255,255));
	}
	else //当按钮不操作或者弹起时
	{
		CBrush brush(m_backgroudColor); 
		dc.FillRect(&(lpDrawItemStruct->rcItem),&brush);//
		
		//同上,进行重绘文字
		DrawText(lpDrawItemStruct->hDC,buffer,size,&lpDrawItemStruct->rcItem,DT_CENTER|DT_VCENTER|DT_SINGLELINE|DT_TABSTOP); 
		SetBkMode(lpDrawItemStruct->hDC,TRANSPARENT);
		dc.Draw3dRect(&rect,RGB(255,255,255),RGB(0,0,0));
		
	}
	
	//选中了本控件,高亮边框
	if ((lpDrawItemStruct->itemState &ODS_SELECTED)&&(lpDrawItemStruct->itemAction &(ODA_SELECT| ODA_DRAWENTIRE)))
	{ 
		dc.Draw3dRect(&rect,RGB(0,0,0),RGB(255,255,255));
	}
	
	//控制的选中状态结束,去掉边框
	if (!(lpDrawItemStruct->itemState & ODS_SELECTED) &&(lpDrawItemStruct->itemAction & ODA_SELECT))
	{
		dc.Draw3dRect(&rect,RGB(0,0,0),RGB(255,255,255));		
	}
	dc.Detach();
}

void CColorButton::SetBackgroundColor(COLORREF color)
{
	m_backgroudColor = color;
}

BOOL CColorButton::Attach(const UINT nID, CWnd* pParent)
{
	if (!SubclassDlgItem(nID, pParent))
	{
		return FALSE;
	}
	
	return TRUE;
}