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|
/*
/----------------------------------------------------------------
|
| $Id: dibwnd.cpp,v 1.5 2002/03/31 13:36:42 uzadow Exp $
| Window containing a bitmap.
|
| Child window containing a bitmap. Handles
| scrolling and resize.
|
| Copyright (c) 1996-2002 Ulrich von Zadow
|
\----------------------------------------------------------------
*/
#include "stdafx.h"
#include "dibwnd.h"
#ifdef _DEBUG
#undef THIS_FILE
static char BASED_CODE THIS_FILE[] = __FILE__;
#endif
//////////////////////////////////////////////////////////////////////
// CDIBWnd
IMPLEMENT_DYNAMIC (CDIBWnd, CWnd);
CDIBWnd::CDIBWnd
( PLWinBmp * pBmp
)
: m_BmpPos (0,0)
{
m_pBmp = pBmp;
m_bScrolling = false;
m_BmpSize = m_pBmp->GetSize();
}
CDIBWnd::~CDIBWnd
()
{
}
void CDIBWnd::NewDIBNotify
()
// Call this whenever the bitmap is changed outside of the object.
{
CRect rect;
GetClientRect (&rect);
int cx = rect.right;
int cy = rect.bottom;
m_BmpSize = m_pBmp->GetSize();
m_BmpPos = CPoint (0, 0);
initScrollBars (cx, cy);
InvalidateRect (false);
}
/////////////////////////////////////////////////////////////////////////////
// CDIBWnd operations
BEGIN_MESSAGE_MAP(CDIBWnd, CWnd)
//{{AFX_MSG_MAP(CDIBWnd)
ON_WM_CREATE()
ON_WM_SIZE()
ON_WM_VSCROLL()
ON_WM_PAINT()
ON_WM_HSCROLL()
//}}AFX_MSG_MAP
END_MESSAGE_MAP()
/////////////////////////////////////////////////////////////////////////////
// CDIBWnd message handlers
int CDIBWnd::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
if (CWnd::OnCreate(lpCreateStruct) == -1)
return -1;
return 0;
}
void CDIBWnd::OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
m_BmpPos.y = handleScroll (SB_VERT, nSBCode, nPos,
m_Size.cy, m_BmpSize.cy, m_BmpPos.y);
CWnd::OnVScroll (nSBCode, nPos, pScrollBar);
}
void CDIBWnd::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
m_BmpPos.x = handleScroll (SB_HORZ, nSBCode, nPos,
m_Size.cx, m_BmpSize.cx, m_BmpPos.x);
CWnd::OnHScroll(nSBCode, nPos, pScrollBar);
}
BOOL CDIBWnd::PreCreateWindow (CREATESTRUCT& cs)
{
cs.style = WS_CHILD | WS_VISIBLE | WS_VSCROLL | WS_HSCROLL;
return CWnd::PreCreateWindow (cs);
}
void CDIBWnd::OnSize(UINT nType, int cx, int cy)
{
CWnd::OnSize(nType, cx, cy);
m_Size = CSize (cx, cy);
initScrollBars (cx, cy);
InvalidateRect (false);
}
void CDIBWnd::OnPaint()
{
CPaintDC DC(this); // device context for painting
// Hintergrund
if (!m_bScrolling &&
(m_Size.cx>m_BmpSize.cx || m_Size.cy>m_BmpSize.cy))
{
CRect Rect;
GetClientRect (&Rect);
Rect.InflateRect (2, 2); // Ist ntig, sonst fehlt was ;-)
CPen * pOldPen = (CPen *) DC.SelectStockObject (NULL_PEN);
CBrush * pOldBrush = (CBrush *) DC.SelectStockObject (LTGRAY_BRUSH);
DC.Rectangle (&Rect);
DC.SelectObject (pOldPen);
DC.SelectObject (pOldBrush);
}
else
m_bScrolling = false;
// Bitmap
m_pBmp->Draw (DC.GetSafeHdc(), -m_BmpPos.x, -m_BmpPos.y);
}
/////////////////////////////////////////////////////////////////////////////
// CDIBWnd internals
void CDIBWnd::initScrollBars
( int cx,
int cy
)
{
initScrollBar (SB_VERT, cy, m_BmpSize.cy, m_BmpPos.y);
initScrollBar (SB_HORZ, cx, m_BmpSize.cx, m_BmpPos.x);
}
void CDIBWnd::initScrollBar
( int ID,
int Page,
int Range,
int Pos
)
{
if (Page >= Range)
ShowScrollBar (ID, false);
else
{
ShowScrollBar (ID, true);
SCROLLINFO SI;
SI.cbSize = sizeof (SCROLLINFO);
SI.fMask = SIF_PAGE | SIF_POS | SIF_RANGE;
SI.nMin = 0;
SI.nMax = Range-1;
SI.nPage = Page;
SetScrollInfo (ID, &SI, false);
SetScrollPos (ID, Pos);
}
}
int CDIBWnd::handleScroll
( int ID,
UINT nSBCode,
UINT nPos,
int Page,
int Range,
int Pos
)
{
int NewPos = Pos;
switch (nSBCode)
{
case SB_TOP:
NewPos = 0;
break;
case SB_BOTTOM:
NewPos = Range-Page;
break;
case SB_LINEUP:
NewPos -= 10;
break;
case SB_LINEDOWN:
NewPos += 10;
break;
case SB_PAGEUP:
NewPos -= Range;
break;
case SB_PAGEDOWN:
NewPos += Range;
break;
case SB_THUMBPOSITION:
case SB_THUMBTRACK:
if (Pos == (int) nPos) return Pos;
NewPos = nPos;
break;
default:
// Ignore SB_ENDSCROLL.
return Pos;
}
if (NewPos > Range-Page)
NewPos = Range-Page;
if (NewPos < 0)
NewPos = 0;
m_bScrolling = true;
InvalidateRect (false);
SetScrollPos (ID, NewPos);
return NewPos;
}
/*
/--------------------------------------------------------------------
|
| $Log: dibwnd.cpp,v $
| Revision 1.5 2002/03/31 13:36:42 uzadow
| Updated copyright.
|
| Revision 1.4 2001/09/16 19:03:23 uzadow
| Added global name prefix PL, changed most filenames.
|
|
--------------------------------------------------------------------
*/
|
