www.pudn.com > 44757463.rar > LineComboBox.cpp

////////////////////////////////////////////////////////////////////// 
// CLASS    :  CLineComboBox 
// ABSTRACT :  线条宽度选择组合框 
// NOTE     :  主要是用在图形的属性设置时的笔宽设置 
// CREATE   :  FNST)handwolf  2004-4-21 
// UPDATE   :   
//          :  
////////////////////////////////////////////////////////////////////// 
 
 
#include "stdafx.h" 
#include "LineComboBox.h" 
 
//################################################################ 
CLineComboBox::CLineComboBox() 
{	 
	//当前鼠标是否在对象上 
	m_nMouseState = 0; 
	m_nLineLength = 45; 
	m_nItemHeight = 20; 
	m_nMargin=2; 
} 
//################################################################ 
CLineComboBox::~CLineComboBox() 
{ 
	while(!m_LineWidthList.IsEmpty()){ 
		delete m_LineWidthList.RemoveHead(); 
	}	 
} 
//################################################################ 
BOOL CLineComboBox::Create(DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID) 
{ 
	DWORD dw = dwStyle; 
	//dw |= CBS_OWNERDRAWVARIABLE; 
	 
	if( !CComboBox::Create(dw, rect, pParentWnd, nID) ) 
		return false; 
 
	CFont * font = CFont::FromHandle((HFONT)::GetStockObject(DEFAULT_GUI_FONT)); 
	SetFont(font); 
 
	return true; 
} 
//################################################################ 
void CLineComboBox::Init() 
{	 
	for(int i = 0; i <= 6; i++) 
	{ 
		LPBSCBITEM lpItem = new BSCBITEM; 
		CString strText; 
		strText.Format("   %d",i+1); 
		lpItem->lpCaption=strText; 
		lpItem->iIndex = AddString(strText); 
		lpItem->nLineWidth = i+1;	 
		 
		if(m_LineWidthList.IsEmpty()) 
			m_LineWidthList.AddHead(lpItem); 
		else 
			m_LineWidthList.AddTail(lpItem);		 
	} 
} 
//################################################################ 
IMPLEMENT_DYNCREATE(CLineComboBox, CComboBox) 
 
BEGIN_MESSAGE_MAP(CLineComboBox, CComboBox) 
	//{{AFX_MSG_MAP(CLineComboBox) 
	ON_WM_ERASEBKGND() 
	ON_WM_PAINT() 
	ON_WM_MOUSEMOVE() 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
//################################################################ 
BOOL CLineComboBox::OnEraseBkgnd(CDC* pDC)  
{	 
	ASSERT(pDC->GetSafeHdc()); 
	return false; 
} 
//################################################################ 
void CLineComboBox::OnPaint()  
{ 
	CPaintDC dc(this);  
	OnCBPaint(&dc); 
} 
//################################################################ 
void CLineComboBox::OnCBPaint(CDC* pDC) 
{ 
	ASSERT(pDC->GetSafeHdc()); 
	 
	//绘制客户区 
	CDC dMemDC; 
	dMemDC.CreateCompatibleDC(pDC); 
	dMemDC.SetMapMode(pDC->GetMapMode());	 
 
	//画动作 
	CBitmap mNewBmp; 
	RECT rc; 
	GetClientRect(&rc); 
	mNewBmp.CreateCompatibleBitmap(pDC, rc.right - rc.left, rc.bottom - rc.top); 
	CBitmap* pOldBmp = dMemDC.SelectObject(&mNewBmp); 
 
	//子类可以以friend方式来访问父类的protected成员变量和函数 
	CWnd::DefWindowProc(WM_PAINT, (WPARAM)dMemDC.m_hDC, 0); 
	 
	pDC->BitBlt(rc.left, rc.top, rc.right - rc.left, rc.bottom - rc.top, &dMemDC, 
		rc.left ,rc.top, SRCCOPY); 
	 
	//恢复 
	dMemDC.SelectObject(pOldBmp); 
	pOldBmp->DeleteObject(); 
	dMemDC.DeleteDC(); 
 
	GetWindowRect(&rc); 
	ScreenToClient(&rc); 
	pDC->DrawEdge(&rc, (m_nMouseState ? BDR_RAISEDINNER : BDR_SUNKENINNER), BF_RECT); 
} 
 
//################################################################ 
void CLineComboBox::MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct)  
{	 
	lpMeasureItemStruct->itemHeight = m_nItemHeight; 
} 
//################################################################ 
void CLineComboBox::DrawItem(LPDRAWITEMSTRUCT lpDIS)  
{	 
	ASSERT(lpDIS->CtlType == ODT_COMBOBOX);	 
     
	//画笔 
	CDC* pDC = CDC::FromHandle(lpDIS->hDC); 
	ASSERT(pDC->GetSafeHdc());	 
 
	//绘制区 
	RECT rc = lpDIS->rcItem; 
	CRect rcLine(rc), rcTxt(rc); 
	 
	//当前的Item索引号 
	LPBSCBITEM lpItem = GetItem(lpDIS->itemID);	 
	if(lpItem != NULL){		 
		BOOL bSelected =lpDIS->itemState & ODS_SELECTED;			 
		pDC->FillSolidRect(&rcLine,RGB(255,255,255));//察除以前的画面 
 
		//如果选中	 
		if(bSelected){ 
			pDC->FillSolidRect(&rcLine,RGB(0,255,255)); 
		} 
		//画Line 
		CPen pen,*pOldPen; 
		pen.CreatePen(PS_SOLID,lpItem->nLineWidth,RGB(0,0,255)); 
		pOldPen=pDC->SelectObject(&pen);        
		rcLine.right=rcLine.left+m_nLineLength; 
		rcLine.DeflateRect(m_nMargin,m_nMargin);	 
		 
 
		pDC->MoveTo(rcLine.left,(rcLine.top+rcLine.bottom)/2); 
		pDC->LineTo(rcLine.right,(rcLine.top+rcLine.bottom)/2);		 
 
		pDC->SelectObject(pOldPen); 
         
	//	pDC->DrawEdge(&rcLine, BDR_RAISEDINNER, BF_RECT); 
		//开始画文字 
		int nOldBkMode = pDC->SetBkMode(TRANSPARENT); 
		pDC->SetTextColor(RGB(0, 0, 0));		 
		rcTxt.left = rcLine.right + m_nMargin; 
	//	rcTxt.top = rcLine.top;		 
		pDC->DrawText(lpItem->lpCaption,&rcTxt,DT_VCENTER|DT_END_ELLIPSIS|DT_NOCLIP|DT_SINGLELINE);		 
		pDC->SetBkMode(nOldBkMode); 
	} 
 
} 
//################################################################ 
LPBSCBITEM CLineComboBox::GetItem(int iIndex) 
{ 
	//当前的Item索引号 
	POSITION pos = m_LineWidthList.FindIndex(iIndex); 
	if(pos) 
	{ 
		LPBSCBITEM lpItem = m_LineWidthList.GetAt(pos);		 
		ASSERT(lpItem); 
		return lpItem; 
	} 
	else 
		return (LPBSCBITEM)NULL; 
} 
//################################################################ 
void CLineComboBox::OnMouseMove(UINT nFlags, CPoint point)  
{ 
	CComboBox::OnMouseMove(nFlags, point); 
} 
 
 
int CLineComboBox::GetCurLineWidth() 
{ 
	int nSel=GetCurSel(); 
	POSITION pos = m_LineWidthList.FindIndex(nSel); 
	if(pos) 
	{ 
		LPBSCBITEM lpItem = m_LineWidthList.GetAt(pos);		 
		ASSERT(lpItem); 
		return lpItem->nLineWidth; 
	} 
	else 
		return 0; 
}