MFC Windows 程序设计之LED按钮

// LedButton.cpp : implementation file // #include "stdafx.h" #include "LedButton.h" #ifdef _DEBUG #define new DEBUG_NEW #undef THIS_FILE static char THIS_FILE[] = __FILE__; #endif /* Copyright: Completely Free (as long as this header remains like this) ! Please visit http://welcome.to/softbird for updates, other sources and more ! (c)Benjamin Mayrargue 2000 */ ///////////////////////////////////////////////////////////////////////////// // CLedButton void CLedButton::Init( BOOL bReadOnly/*=TRUE*/, BOOL bDepressed/*=FALSE*/, BOOL bCenterAlign/*=TRUE*/ ) { m_bDepressed = bDepressed; m_bCenterAlign = bCenterAlign; m_nMargin = DEFAULT_MARGIN; m_bReadOnly = bReadOnly; } BEGIN_MESSAGE_MAP(CLedButton, CButton) //{{AFX_MSG_MAP(CLedButton) //}}AFX_MSG_MAP //ON_CONTROL_REFLECT_EX(BN_CLICKED, OnClicked) END_MESSAGE_MAP() ///////////////////////////////////////////////////////////////////////////// // CLedButton message handlers void CLedButton::PreSubclassWindow() { CButton::PreSubclassWindow(); // make sure we are an owner draw button ModifyStyle(0, BS_OWNERDRAW); CRect rect; GetClientRect(rect); // setup the button metrics LOGFONT lf; GetFont()->GetLogFont(&lf); m_nRadius = lf.lfHeight; if( m_nRadius == 0 ) m_nRadius = 15; if( m_nRadius < 0 ) m_nRadius = (-1)*m_nRadius; m_nRadius = (int)(rect.bottom*0.5)-5; // don't let the button get above this maximum radius // user can reset m_nRadius later, if desired if( m_nRadius > 6 ) m_nRadius = 6; m_ptCenter.x = rect.left+m_nRadius+1; if( m_bCenterAlign ) m_ptCenter.y = rect.top+(int)(rect.Height()*0.5+0.5); else m_ptCenter.y = rect.top+m_nRadius+1; } void CLedButton::SetImage(UINT idBmp, UINT nWidthOfOneImage) { m_imgList.Create( idBmp, nWidthOfOneImage ); m_rcImage = m_imgList.GetImageDimension(); m_ptCenter.x = 1; //m_ptCenter.x - rcImage.cx/2; m_ptCenter.y = m_ptCenter.y - m_rcImage.cy/2; if( m_nMargin<m_rcImage.cx ) m_nMargin = 5 + m_rcImage.cx; } // draw the button and text void CLedButton::DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct) { ASSERT(lpDrawItemStruct != NULL); if( lpDrawItemStruct->itemAction != ODA_DRAWENTIRE ) return; CDC* pDC = CDC::FromHandle(lpDrawItemStruct->hDC); CRect rect = lpDrawItemStruct->rcItem; int nSavedDC = pDC->SaveDC(); pDC->SelectStockObject(NULL_BRUSH); pDC->FillSolidRect(rect, ::GetSysColor(COLOR_BTNFACE)); //if( GetStyle()&BS_AUTOCHECKBOX && lpDrawItemStruct->itemState&ODS_SELECTED) // SetCheck(GetCheck()?0:1); //if( !m_bReadOnly ) //m_bDepressed = lpDrawItemStruct->itemState&ODS_SELECTED; //m_bDepressed = GetCheck(); //Does not work as an auto checkbox !!! Why ??? if( m_bDepressed ) //Button down m_imgList.Draw(pDC,1,m_ptCenter); else //Button up m_imgList.Draw(pDC,0,m_ptCenter); // draw the text if there is any CString strText; GetWindowText(strText); CSize Extent; CPoint pt; CRect textRect, clientRect; GetClientRect( clientRect ); textRect = clientRect; textRect.left += m_nMargin; textRect.right -= 2; if (!strText.IsEmpty()) { pDC->SetBkMode(TRANSPARENT); /*if (state & ODS_DISABLED) { Extent = pDC->GetTextExtent(strText); pt.x = rect.left + m_nMargin; pt.y = (int)((rect.Height() - Extent.cy)*0.5); pDC->DrawState(pt, Extent, strText, DSS_DISABLED, TRUE, 0, (HBRUSH)NULL); } else*/ { pDC->DrawText( strText, textRect, DT_LEFT|DT_NOPREFIX|DT_WORDBREAK|DT_CALCRECT ); int h = textRect.Height(); textRect.top = clientRect.top+(int)((clientRect.Height()-textRect.Height())*0.5+0.5); textRect.bottom = textRect.top + h; pDC->DrawText( strText, textRect, DT_LEFT|DT_NOPREFIX|DT_WORDBREAK ); m_textRect = textRect; } } textRect.right += 2; pDC->RestoreDC(nSavedDC); } // return the button's depression state BOOL CLedButton::IsDepressed() { if( !m_bReadOnly ) m_bDepressed = GetCheck(); return m_bDepressed; } // set the button's depression state BOOL CLedButton::Depress(BOOL bDown) { //if( !m_bReadOnly ) // m_bDepressed = GetCheck(); if( bDown != m_bDepressed ) { m_bDepressed = bDown; //SetCheck(bDown); //PostMessage(BM_SETCHECK, bDown, 0); RedrawWindow(); } return m_bDepressed; } /* BOOL CLedButton::OnClicked() { //Depress(!GetCheck()); //Does not work. It seems that SetCheck can not be called from inside a handler. return FALSE; //Continue routing } */