xbutton.cpp

Under CE4.2 view bitmap with shrink and magnify

// XButton.cpp : implementation file
//
#include "stdafx.h"
#include "resource.h"
#include "XButton.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

/////////////////////////////////////////////////////////////////////////////
// CXButton
HWND CXButton::m_hWndToolTip = NULL;

CXButton::CXButton()
{
	m_bDown   = FALSE;
	m_bUp	  = FALSE;
	m_hMemDC  = NULL;
}

CXButton::~CXButton()
{
	if (m_hMemDC != NULL) DeleteDC(m_hMemDC);
}

BEGIN_MESSAGE_MAP(CXButton, CStatic)
	//{{AFX_MSG_MAP(CXButton)
	ON_WM_PAINT()
	ON_WM_ERASEBKGND()
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONUP()
	ON_WM_LBUTTONDBLCLK()
	ON_WM_MOUSEMOVE()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CXButton message handlers

void CXButton::OnPaint() 
{
	CPaintDC dc(this); // device context for painting

	ModifyStyle(0,SS_NOTIFY);

	CRect rect;
	GetClientRect(&rect);

	if(m_hMemDC == NULL)
		m_hMemDC = CreateCompatibleDC(dc.m_hDC);

	UINT nID = m_bDown?m_nImageDown:m_nImageUp;

	if(!IsWindowEnabled())
	{
		nID = m_nImageDisabled;
		if(m_bDown) 
		{
			ReleaseCapture();
			m_bDown = FALSE;
		}
	}
	
	HBITMAP hBitmap = LoadBitmap(AfxGetInstanceHandle(),MAKEINTRESOURCE(nID));
    HBITMAP hOldBMP = (HBITMAP)SelectObject(m_hMemDC,hBitmap);
	BitBlt(dc.m_hDC,rect.left,rect.top,rect.Width(),rect.Height(),m_hMemDC,0,0,SRCCOPY);

	SelectObject(m_hMemDC,hOldBMP);
	DeleteObject(hBitmap);
}

BOOL CXButton::OnEraseBkgnd(CDC* pDC) 
{
	return TRUE;
}

void CXButton::OnLButtonDblClk(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
 	SendMessage(WM_LBUTTONDOWN,nFlags,MAKELPARAM(point.x,point.y));	
}

void CXButton::OnLButtonDown(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	m_bDown = TRUE;
	Invalidate();
//sparrow.shi	
	if(!IsWindowEnabled())
	{
		m_bDown = FALSE;
		return;
	}
//sparrow.shi
	SetCapture();
	SetFocus();
	m_bUp = FALSE;
//	Default();
}

void CXButton::OnLButtonUp(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	if(m_bDown)
	{
		m_bDown = FALSE;
		Invalidate();
		ReleaseCapture();
		CRect rect;
		GetClientRect(&rect);
		//if(::PtInRect(&rect,point) && m_bDown)	
		if(::PtInRect(&rect,point))	
		{
			m_bUp = TRUE;
			m_bDown = FALSE;
			int nID = GetDlgCtrlID();
			GetParent()->SendMessage(WM_COMMAND ,MAKEWPARAM(nID,0),(LPARAM)m_hWnd); 
		}
	}
	CStatic::OnLButtonUp(nFlags, point);
}

void CXButton::LoadBitmaps(UINT nUP, UINT nDown,UINT nDisabled)
{
	m_nImageUp = nUP;
	m_nImageDown = nDown;
	m_nImageDisabled = nDisabled;
	Invalidate();
}

void CXButton::Show()
{
	ShowWindow(SW_SHOW);
}

void CXButton::Hide()
{
	ShowWindow(SW_HIDE);
}

void CXButton::OnMouseMove(UINT nFlags, CPoint point) 
{
	// TODO: Add your message handler code here and/or call default
	if(GetCapture() != this)
	{
		m_bDown = FALSE;
		ReleaseCapture();
	}
	Invalidate();	
	
	CStatic::OnMouseMove(nFlags, point);
}

BOOL CXButton::isUp()
{
	return m_bUp;
}