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// AutoScrollView.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "OAM.h" 
#include "AutoScrollView.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CAutoScrollView 
 
IMPLEMENT_DYNCREATE(CAutoScrollView, CScrollView) 
 
CAutoScrollView::CAutoScrollView() 
{ 
	m_bIsScrolling = FALSE; 
} 
 
CAutoScrollView::~CAutoScrollView() 
{ 
} 
 
 
BEGIN_MESSAGE_MAP(CAutoScrollView, CScrollView) 
	//{{AFX_MSG_MAP(CAutoScrollView) 
	ON_WM_LBUTTONDOWN() 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CAutoScrollView drawing 
 
void CAutoScrollView::OnInitialUpdate() 
{ 
	CScrollView::OnInitialUpdate(); 
 
	CSize sizeTotal; 
	// TODO: calculate the total size of this view 
	sizeTotal.cx = sizeTotal.cy = 100; 
	SetScrollSizes(MM_TEXT, sizeTotal); 
} 
 
void CAutoScrollView::OnDraw(CDC* pDC) 
{ 
	CDocument* pDoc = GetDocument(); 
	// TODO: add draw code here 
} 
 
///////////////////////////////////////////////////////////////////////////// 
// CAutoScrollView diagnostics 
 
#ifdef _DEBUG 
void CAutoScrollView::AssertValid() const 
{ 
	CScrollView::AssertValid(); 
} 
 
void CAutoScrollView::Dump(CDumpContext& dc) const 
{ 
	CScrollView::Dump(dc); 
} 
#endif //_DEBUG 
 
///////////////////////////////////////////////////////////////////////////// 
// CAutoScrollView message handlers 
 
void CAutoScrollView::AutoScrollView(UINT nRefMessage) 
{ 
		HCURSOR hCur; 
		hCur = AfxGetApp()->LoadCursor(IDC_HANDCUR);//AFX_IDC_HSPLITBAR); 
		SetCursor(hCur); 
	m_bIsScrolling = TRUE; 
	MSG msg; 
	CPoint ptScrollPos; 
	CPoint ptDevScrollPos; 
	CPoint ptCursorPos; 
	CRect rc; 
	long dx,dy; 
	SIZE sizeTotal; 
	SIZE sizePage; 
	SIZE sizeLine; 
	int nMapMode; 
	int nMapFactor; 
	int xMin,xMax; 
	int yMin,yMax; 
 
///// 
	CPoint ptOldCursorPos; 
		GetCursorPos(&ptOldCursorPos); 
		ScreenToClient(&ptOldCursorPos); 
///// 
	msg.message = 0; 
	SetCapture(); 
	GetDeviceScrollSizes(nMapMode,sizeTotal,sizePage,sizeLine); 
	 
	GetScrollRange(SB_HORZ,&xMin,&xMax); 
	GetScrollRange(SB_VERT,&yMin,&yMax); 
 
	while(msg.message != nRefMessage) 
	{ 
		if(PeekMessage(&msg,0,0,0,PM_REMOVE)) 
		{ 
			TranslateMessage(&msg); 
			DispatchMessage(&msg); 
		} 
		if(msg.message != WM_MOUSEMOVE) 
			continue; 
		ptScrollPos = GetScrollPosition(); 
		ptDevScrollPos = GetDeviceScrollPosition(); 
		GetCursorPos(&ptCursorPos); 
		ScreenToClient(&ptCursorPos); 
		GetClientRect(&rc); 
		dx = 0l; 
		dy = 0l; 
////////////// 
 
		dx = ptOldCursorPos.x - ptCursorPos.x; 
		if(dx < 0 && sizeTotal.cx <= rc.Width()) 
			dx = 0; 
		else if(dx > 0 && (ptDevScrollPos.x < xMin || sizeTotal.cx <= rc.Width())) 
			dx = 0; 
		dy = ptOldCursorPos.y - ptCursorPos.y; 
		if(dy < 0 && sizeTotal.cy <= rc.Height()) 
			dy = 0; 
		else if(dy > 0 && (ptDevScrollPos.y < yMin || sizeTotal.cy <= rc.Height())) 
			dy = 0; 
		ptOldCursorPos = ptCursorPos; 
 
////////////// 
/* 
		if((ptCursorPos.y<0)&&(ptDevScrollPos.y != yMin)) 
			dy = min(-sizeLine.cy,max(-sizePage.cy, 
				(ptCursorPos.y/10)*sizeLine.cy)); 
		else if ((ptCursorPos.y>rc.bottom)&&(ptDevScrollPos.y!=yMax)) 
			dy = max(sizeLine.cy,min(sizePage.cy, 
				((ptCursorPos.y-rc.bottom)/10)*sizeLine.cy)); 
 
		if((ptCursorPos.x<0)&&(ptDevScrollPos.x != xMin)) 
			dx = min(-sizeLine.cx,max(-sizePage.cx, 
				(ptCursorPos.x/10)*sizeLine.cx)); 
		else if ((ptCursorPos.x>rc.right)&&(ptDevScrollPos.x!=xMax)) 
			dx = max(sizeLine.cx,min(sizePage.cx, 
				((ptCursorPos.x-rc.right)/10)*sizeLine.cx)); 
*/ 
////////////////////// 
		if((dx != 0)||(dy != 0)) 
		{ 
			nMapFactor = (nMapMode == MM_TEXT)?1:-1; 
			ptScrollPos.y += (int)dy*nMapFactor; 
			ptScrollPos.x += (int)dx; 
//			m_bIsScrolling = TRUE; 
//			OnAutoScroll(ptCursorPos,TRUE); 
			ScrollToPosition(ptScrollPos); 
//			OnAutoScroll(ptCursorPos,FALSE); 
		} 
		else 
		{ 
//			m_bIsScrolling = FALSE; 
		} 
	} 
	ReleaseCapture(); 
	m_bIsScrolling = FALSE; 
 
} 
 
void CAutoScrollView::OnLButtonDown(UINT nFlags, CPoint point)  
{ 
	// TODO: Add your message handler code here and/or call default 
	AutoScrollView(WM_LBUTTONUP); 
	 
	CScrollView::OnLButtonDown(nFlags, point); 
}