pushpinbutton.cpp

此程序利用串口读取民航AFTN电报网中的AFTN信息

// PushPinButton.cpp : implementation file
//

#include "stdafx.h"
#include "AFTNTrans.h"
#include "PushPinButton.h"

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

/////////////////////////////////////////////////////////////////////////////
// CPushPinButton

BEGIN_MESSAGE_MAP(CPushPinButton, CButton)
  //{{AFX_MSG_MAP(CPushPinButton)
  //}}AFX_MSG_MAP
  ON_CONTROL_REFLECT(BN_CLICKED, OnClicked)
END_MESSAGE_MAP()


CPushPinButton::CPushPinButton()
{
  m_bPinned = FALSE;
  m_bUseEdge = TRUE;
  m_MaxRect = CRect(0, 0, 0, 0);

  LoadBitmaps();
}


void CPushPinButton::ReloadBitmaps()
{
  //free the bitmap resources
  m_PinnedBitmap.DeleteObject();
  m_UnPinnedBitmap.DeleteObject();

  //Reload the bitmaps
  LoadBitmaps();

	//size to content
	SizeToContent();

  //Invalidate the maximum rect of the pushpin on the parent window
  GetParent()->InvalidateRect(m_MaxRect);

  //Force this button to redraw aswell
  Invalidate();
}


void CPushPinButton::LoadBitmaps()
{
  if (m_bUseEdge)
  {
    BOOL bLoad = m_PinnedBitmap.Attach((HBITMAP) LoadImage(AfxGetResourceHandle(), MAKEINTRESOURCE(IDB_PINNEDEDGE_BITMAP), 
                                                           IMAGE_BITMAP, 0, 0, LR_LOADMAP3DCOLORS));
    ASSERT(bLoad);

    bLoad = m_UnPinnedBitmap.Attach((HBITMAP) LoadImage(AfxGetResourceHandle(), MAKEINTRESOURCE(IDB_UNPINNEDEDGE_BITMAP), 
                                                        IMAGE_BITMAP, 0, 0, LR_LOADMAP3DCOLORS));
    ASSERT(bLoad);
  }
  else
  {
    BOOL bLoad = m_PinnedBitmap.Attach((HBITMAP) LoadImage(AfxGetResourceHandle(), MAKEINTRESOURCE(IDB_PINNED_BITMAP), 
                                                           IMAGE_BITMAP, 0, 0, LR_LOADMAP3DCOLORS));
    ASSERT(bLoad);

    bLoad = m_UnPinnedBitmap.Attach((HBITMAP) LoadImage(AfxGetResourceHandle(), MAKEINTRESOURCE(IDB_UNPINNED_BITMAP), 
                                                        IMAGE_BITMAP, 0, 0, LR_LOADMAP3DCOLORS));
    ASSERT(bLoad);
  }
}


void CPushPinButton::DrawItem(LPDRAWITEMSTRUCT lpDIS) 
{
  ASSERT(lpDIS != NULL);
  
  //select the bitmap
  CBitmap* pBitmap;
  if (m_bPinned)
    pBitmap = &m_PinnedBitmap;
  else
    pBitmap = &m_UnPinnedBitmap;
  
  // draw the whole button
  CDC* pDC = CDC::FromHandle(lpDIS->hDC);
  CDC memDC;
  memDC.CreateCompatibleDC(pDC);
  CBitmap* pOld = memDC.SelectObject(pBitmap);
  if (pOld == NULL)
    return;     // destructors will clean up

  CRect rect;
  rect.CopyRect(&lpDIS->rcItem);
  pDC->BitBlt(rect.left, rect.top, rect.Width(), rect.Height(),
    &memDC, 0, 0, SRCCOPY);
  memDC.SelectObject(pOld);
}


void CPushPinButton::SetPinned(BOOL bPinned)
{
  m_bPinned = bPinned;
  Invalidate();
}


void CPushPinButton::SetUseEdgeBitmap(BOOL bUseEdge)
{
  if (bUseEdge == m_bUseEdge)  //quick return
    return;

  m_bUseEdge = bUseEdge;   //toggle the option, reload and
  ReloadBitmaps();         //and force a redraw
}


void CPushPinButton::OnClicked() 
{
  m_bPinned = !m_bPinned;  //toggle the pinned option
  Invalidate();            //and force a redraw
}


void CPushPinButton::PreSubclassWindow() 
{
	CButton::PreSubclassWindow();

  //button must be owner draw
  ASSERT(GetWindowLong(m_hWnd, GWL_STYLE) & BS_OWNERDRAW);

	//size to content
	SizeToContent();
}


void CPushPinButton::SizeToContent()
{
	ASSERT(m_PinnedBitmap.m_hObject != NULL);
	CSize bitmapSize;
	BITMAP bmInfo;
	VERIFY(m_PinnedBitmap.GetObject(sizeof(bmInfo), &bmInfo) == sizeof(bmInfo));

  //Calculate the client rect in parent coordinates of the maximum size of the pushpin button
  m_MaxRect = CRect(0, 0, max(bmInfo.bmWidth, m_MaxRect.Width()), max(bmInfo.bmHeight, m_MaxRect.Height()));
  ClientToScreen(&m_MaxRect);

  CPoint p1(m_MaxRect.left, m_MaxRect.top);
  CPoint p2(m_MaxRect.right, m_MaxRect.bottom);
  HWND hParent = ::GetParent(m_hWnd);
  ::ScreenToClient(hParent, &p1);
  ::ScreenToClient(hParent, &p2);
  m_MaxRect = CRect(p1, p2);

  //resize the button to match the size of the bitmap
	VERIFY(SetWindowPos(NULL, -1, -1, bmInfo.bmWidth, bmInfo.bmHeight,
      	 SWP_NOMOVE|SWP_NOZORDER|SWP_NOREDRAW|SWP_NOACTIVATE));
}