www.pudn.com > vc开发的精美界面.zip > BCGMenuButton.cpp

//******************************************************************************* 
// COPYRIGHT NOTES 
// --------------- 
// This source code is a part of BCGControlBar library. 
// You may use, compile or redistribute it as part of your application  
// for free. You cannot redistribute it as a part of a software development  
// library without the agreement of the author. If the sources are  
// distributed along with the application, you should leave the original  
// copyright notes in the source code without any changes. 
// This code can be used WITHOUT ANY WARRANTIES on your own risk. 
//  
// For the latest updates to this library, check my site: 
// http://welcome.to/bcgsoft 
//  
// Stas Levin  
//******************************************************************************* 
 
// BCGMenuButton.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "MenuImages.h" 
#include "bcgcontrolbar.h" 
#include "BCGMenuButton.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
static const int nImageHorzMargin = 10; 
 
///////////////////////////////////////////////////////////////////////////// 
// CBCGMenuButton 
 
IMPLEMENT_DYNAMIC(CBCGMenuButton, CBCGButton) 
 
CBCGMenuButton::CBCGMenuButton() 
{ 
	m_bRightArrow = FALSE; 
	m_hMenu = NULL; 
	m_nMenuResult = 0; 
	m_bMenuIsActive = FALSE; 
} 
//***************************************************************************************** 
CBCGMenuButton::~CBCGMenuButton() 
{ 
} 
 
 
BEGIN_MESSAGE_MAP(CBCGMenuButton, CBCGButton) 
	//{{AFX_MSG_MAP(CBCGMenuButton) 
	ON_WM_KEYDOWN() 
	ON_WM_LBUTTONDOWN() 
	ON_WM_GETDLGCODE() 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
 
///////////////////////////////////////////////////////////////////////////// 
// CBCGMenuButton message handlers 
 
CSize CBCGMenuButton::SizeToContent (BOOL bCalcOnly) 
{ 
	CSize size = CBCGButton::SizeToContent (FALSE); 
	size.cx += CMenuImages::Size ().cx; 
 
	if (!bCalcOnly) 
	{ 
		SetWindowPos (NULL, -1, -1, size.cx, size.cy, 
			SWP_NOMOVE | SWP_NOACTIVATE | SWP_NOZORDER); 
	} 
 
	return size; 
} 
//***************************************************************************************** 
void CBCGMenuButton::OnDraw (CDC* pDC, const CRect& rect, UINT uiState) 
{ 
	ASSERT_VALID (pDC); 
 
	CSize sizeArrow = CMenuImages::Size (); 
 
	CRect rectParent = rect; 
	rectParent.right -= sizeArrow.cx + nImageHorzMargin; 
 
	CBCGButton::OnDraw (pDC, rectParent, uiState); 
 
	int iImage; 
	if (!m_bRightArrow) 
	{ 
		iImage = (uiState & ODS_DISABLED) ? CMenuImages::IdArowDownDsbl : CMenuImages::IdArowDown; 
	} 
	else 
	{ 
		iImage = (uiState & ODS_DISABLED) ? CMenuImages::IdArowLeftDsbl : CMenuImages::IdArowLeft; 
	} 
 
	CRect rectArrow = rect; 
	rectArrow.left = rectParent.right; 
 
	CPoint pointImage ( 
		rectArrow.left + (rectArrow.Width () - sizeArrow.cx) / 2, 
		rectArrow.top + (rectArrow.Height () - sizeArrow.cy) / 2); 
 
	CMenuImages::Draw (pDC, (CMenuImages::IMAGES_IDS) iImage, pointImage); 
} 
//***************************************************************************************** 
void CBCGMenuButton::OnShowMenu ()  
{ 
	if (m_hMenu == NULL || m_bMenuIsActive) 
	{ 
		return; 
	} 
 
	CRect rectWindow; 
	GetWindowRect (rectWindow); 
 
	int x, y; 
 
	if (m_bRightArrow) 
	{ 
		x = rectWindow.right; 
		y = rectWindow.top; 
	} 
	else 
	{ 
		x = rectWindow.left; 
		y = rectWindow.bottom; 
	} 
 
	m_bMenuIsActive = TRUE; 
	Invalidate (); 
 
	m_nMenuResult = ::TrackPopupMenu (m_hMenu,  
		TPM_LEFTALIGN | TPM_LEFTBUTTON | TPM_NONOTIFY | TPM_RETURNCMD,  
		x, y, 0, GetSafeHwnd (), NULL); 
 
	if (m_nMenuResult != 0) 
	{ 
		//------------------------------------------------------- 
		// Trigger mouse up event (to button click notification): 
		//------------------------------------------------------- 
		CWnd* pParent = GetParent (); 
		if (pParent != NULL) 
		{ 
			pParent->SendMessage (	WM_COMMAND, 
									MAKEWPARAM (GetDlgCtrlID (), BN_CLICKED), 
									(LPARAM) m_hWnd); 
		} 
	} 
 
	// -- By Thomas Freudenberg: 
	m_bPushed = FALSE; 
	m_bHighlighted = FALSE; 
	m_bMenuIsActive = FALSE; 
	 
	Invalidate (); 
	UpdateWindow (); 
 
	if (m_bCaptured) 
	{ 
		ReleaseCapture (); 
		m_bCaptured = FALSE; 
	} 
	//-- 
} 
//***************************************************************************************** 
void CBCGMenuButton::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)  
{ 
	if (nChar == VK_SPACE || nChar == VK_DOWN) 
	{ 
		OnShowMenu (); 
		return; 
	} 
	 
	CButton::OnKeyDown(nChar, nRepCnt, nFlags); 
} 
//***************************************************************************************** 
void CBCGMenuButton::OnLButtonDown(UINT /*nFlags*/, CPoint /*point*/)  
{ 
	SetFocus (); 
	OnShowMenu (); 
} 
//***************************************************************************************** 
UINT CBCGMenuButton::OnGetDlgCode()  
{ 
	return DLGC_WANTARROWS; 
}