www.pudn.com > SkinListDone.rar > SkinVerticleScrollbar.cpp

// SkinVerticleScrollbar.cpp : implementation file 
// 
 
#include "stdafx.h" 
#include "SkinList.h" 
#include "SkinVerticleScrollbar.h" 
 
#ifdef _DEBUG 
#define new DEBUG_NEW 
#undef THIS_FILE 
static char THIS_FILE[] = __FILE__; 
#endif 
 
///////////////////////////////////////////////////////////////////////////// 
// CSkinVerticleScrollbar 
 
CSkinVerticleScrollbar::CSkinVerticleScrollbar() 
{ 
	bMouseDown = false; 
	bMouseDownArrowUp = false; 
	bMouseDownArrowDown = false; 
	bDragging = false; 
 
	nThumbTop = 36; 
	dbThumbInterval = 0.000000; 
	pList = NULL; 
 
} 
 
CSkinVerticleScrollbar::~CSkinVerticleScrollbar() 
{ 
} 
 
 
BEGIN_MESSAGE_MAP(CSkinVerticleScrollbar, CStatic) 
	//{{AFX_MSG_MAP(CSkinVerticleScrollbar) 
	ON_WM_ERASEBKGND() 
	ON_WM_LBUTTONDOWN() 
	ON_WM_LBUTTONUP() 
	ON_WM_MOUSEMOVE() 
	ON_WM_PAINT() 
	ON_WM_TIMER() 
	//}}AFX_MSG_MAP 
END_MESSAGE_MAP() 
 
///////////////////////////////////////////////////////////////////////////// 
// CSkinVerticleScrollbar message handlers 
 
BOOL CSkinVerticleScrollbar::OnEraseBkgnd(CDC* pDC)  
{ 
	return CStatic::OnEraseBkgnd(pDC); 
} 
 
void CSkinVerticleScrollbar::OnLButtonDown(UINT nFlags, CPoint point)  
{ 
	SetCapture(); 
	CRect clientRect; 
	GetClientRect(&clientRect); 
 
	int nHeight = clientRect.Height() - 37; 
	 
 
	CRect rectUpArrow(0,11,12,37); 
	CRect rectDownArrow(0,nHeight,12,nHeight+26); 
	CRect rectThumb(0,nThumbTop,12,nThumbTop+26); 
 
	if(rectThumb.PtInRect(point)) 
	{ 
		bMouseDown = true; 
	} 
 
	if(rectDownArrow.PtInRect(point)) 
	{ 
		bMouseDownArrowDown = true; 
		SetTimer(2,250,NULL); 
	} 
 
	if(rectUpArrow.PtInRect(point)) 
	{ 
		bMouseDownArrowUp = true; 
		SetTimer(2,250,NULL); 
	} 
	 
	CStatic::OnLButtonDown(nFlags, point); 
} 
 
void CSkinVerticleScrollbar::OnLButtonUp(UINT nFlags, CPoint point)  
{ 
	UpdateThumbPosition(); 
	KillTimer(1); 
	ReleaseCapture(); 
	 
	bool bInChannel = true; 
 
	CRect clientRect; 
	GetClientRect(&clientRect); 
	int nHeight = clientRect.Height() - 37; 
	CRect rectUpArrow(0,11,12,37); 
	CRect rectDownArrow(0,nHeight,12,nHeight+26); 
	CRect rectThumb(0,nThumbTop,12,nThumbTop+26); 
 
 
 
	if(rectUpArrow.PtInRect(point) && bMouseDownArrowUp) 
	{ 
		ScrollUp();	 
		bInChannel = false; 
	} 
 
	if(rectDownArrow.PtInRect(point) && bMouseDownArrowDown) 
	{ 
		ScrollDown(); 
		bInChannel = false; 
	} 
 
	if(rectThumb.PtInRect(point)) 
	{ 
		bInChannel = false; 
	} 
 
	if(bInChannel == true) 
	{ 
		if(point.y > nThumbTop) 
		{ 
			PageDown(); 
		} 
		else 
		{ 
			PageUp(); 
		} 
	} 
 
	bMouseDown = false; 
	bDragging = false; 
	bMouseDownArrowUp = false; 
	bMouseDownArrowDown = false; 
	 
	CStatic::OnLButtonUp(nFlags, point); 
} 
 
void CSkinVerticleScrollbar::OnMouseMove(UINT nFlags, CPoint point)  
{ 
	CRect clientRect; 
	GetClientRect(&clientRect); 
 
	if(bMouseDown) 
	{ 
		 
		int nPreviousThumbTop = nThumbTop; 
		nThumbTop = point.y-13; //-13 so mouse is in middle of thumb 
		 
		double nMax = pList->GetScrollLimit(SB_VERT); 
		int nPos = pList->GetScrollPos(SB_VERT); 
 
		double nHeight = clientRect.Height()-98; 
		double nVar = nMax; 
		dbThumbInterval = nHeight/nVar; 
 
		//figure out how many times to scroll total from top 
		//then minus the current position from it 
		 
		int nScrollTimes = (int)((nThumbTop-36)/dbThumbInterval)-nPos; 
		 
		CSize size; 
		size.cx = 0; 
		size.cy = nScrollTimes*13; //13 is the height of each row at current font 
								   //I cant figure out how to grab this value 
								   //dynamically 
 
		pList->Scroll(size); 
 
 
		LimitThumbPosition(); 
 
		Draw(); 
		 
	} 
	CStatic::OnMouseMove(nFlags, point); 
} 
 
void CSkinVerticleScrollbar::OnPaint()  
{ 
	CPaintDC dc(this);  
	 
	Draw(); 
} 
 
void CSkinVerticleScrollbar::OnTimer(UINT nIDEvent)  
{ 
	if(nIDEvent == 1) 
	{ 
		if(bMouseDownArrowDown) 
		{ 
			ScrollDown(); 
		} 
		 
		if(bMouseDownArrowUp) 
		{ 
			ScrollUp(); 
		} 
	} 
	else if(nIDEvent == 2) 
	{ 
		if(bMouseDownArrowDown) 
		{ 
			KillTimer(2); 
			SetTimer(1, 50, NULL); 
		} 
		 
		if(bMouseDownArrowUp) 
		{ 
			KillTimer(2); 
			SetTimer(1, 50, NULL); 
		} 
	} 
	CStatic::OnTimer(nIDEvent); 
} 
 
void CSkinVerticleScrollbar::PageDown() 
{ 
	pList->SendMessage(WM_VSCROLL, MAKELONG(SB_PAGEDOWN,0),NULL); 
	UpdateThumbPosition(); 
} 
 
void CSkinVerticleScrollbar::PageUp() 
{ 
	pList->SendMessage(WM_VSCROLL, MAKELONG(SB_PAGEUP,0),NULL); 
	UpdateThumbPosition(); 
} 
 
void CSkinVerticleScrollbar::ScrollUp() 
{ 
	pList->SendMessage(WM_VSCROLL, MAKELONG(SB_LINEUP,0),NULL); 
	UpdateThumbPosition(); 
} 
 
void CSkinVerticleScrollbar::ScrollDown() 
{ 
	pList->SendMessage(WM_VSCROLL, MAKELONG(SB_LINEDOWN,0),NULL); 
	UpdateThumbPosition(); 
} 
 
void CSkinVerticleScrollbar::UpdateThumbPosition() 
{ 
	CRect clientRect; 
	GetClientRect(&clientRect); 
 
	double nPos = pList->GetScrollPos(SB_VERT); 
	double nMax = pList->GetScrollLimit(SB_VERT); 
	double nHeight = (clientRect.Height()-98); 
	double nVar = nMax; 
 
	dbThumbInterval = nHeight/nVar; 
 
	double nNewdbValue = (dbThumbInterval * nPos); 
	int nNewValue = (int)nNewdbValue; 
 
 
	nThumbTop = 36+nNewValue; 
 
	LimitThumbPosition(); 
 
	Draw(); 
} 
 
 
void CSkinVerticleScrollbar::Draw() 
{ 
 
	CClientDC dc(this); 
	CRect clientRect; 
	GetClientRect(&clientRect); 
	CMemDC memDC(&dc, &clientRect); 
	memDC.FillSolidRect(&clientRect,  RGB(74,82,107)); 
	CDC bitmapDC; 
	bitmapDC.CreateCompatibleDC(&dc); 
 
	CBitmap bitmap; 
	bitmap.LoadBitmap(IDB_VERTICLE_SCROLLBAR_TOP); 
	CBitmap* pOldBitmap = bitmapDC.SelectObject(&bitmap); 
	memDC.BitBlt(clientRect.left,clientRect.top,12,11,&bitmapDC,0,0,SRCCOPY); 
	bitmapDC.SelectObject(pOldBitmap); 
	bitmap.DeleteObject(); 
	pOldBitmap = NULL; 
 
	bitmap.LoadBitmap(IDB_VERTICLE_SCROLLBAR_UPARROW); 
	pOldBitmap = bitmapDC.SelectObject(&bitmap); 
	memDC.BitBlt(clientRect.left,clientRect.top+11,12,26,&bitmapDC,0,0,SRCCOPY); 
	bitmapDC.SelectObject(pOldBitmap); 
	bitmap.DeleteObject(); 
	pOldBitmap = NULL; 
	 
	//draw the background (span) 
	bitmap.LoadBitmap(IDB_VERTICLE_SCROLLBAR_SPAN); 
	pOldBitmap = bitmapDC.SelectObject(&bitmap); 
	int nHeight = clientRect.Height() - 37; 
 
	for(int i=0; i (clientRect.Height()-37)) 
	{ 
		nThumbTop = clientRect.Height()-62; 
	} 
 
	if(nThumbTop < (clientRect.top+36)) 
	{ 
		nThumbTop = clientRect.top+36; 
	} 
}