DirextX编程

开发平台：
Visual C++

SplitterBar.cpp：源码内容
							// CSplitterBar.cpp : implementation file
//
/////////////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "PFM.h"
#include "SplitterBar.h"
#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif
/////////////////////////////////////////////////////////////////////////////
// CSplitterBar
IMPLEMENT_DYNAMIC(CSplitterBar, CWnd)
BEGIN_MESSAGE_MAP(CSplitterBar, CWnd)
	//{{AFX_MSG_MAP(CSplitterBar)
	ON_WM_PAINT()
	ON_WM_NCHITTEST()
	ON_WM_CREATE()
	ON_WM_SETCURSOR()
	ON_WM_MOUSEMOVE()
	ON_WM_LBUTTONDOWN()
	ON_WM_LBUTTONUP()
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
CSplitterBar::CSplitterBar()
{
	m_bDragging=FALSE;
	m_pwndLeftPane=m_pwndRightPane=NULL;
}
CSplitterBar::~CSplitterBar()
{
}
BOOL CSplitterBar::Create(DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, UINT nID)
{
	CWnd* pWnd = this;
	return pWnd->Create(NULL, "", dwStyle, rect, pParentWnd, nID);
}
/////////////////////////////////////////////////////////////////////////////
// CSplitterBar message handlers
void CSplitterBar::OnPaint() 
{
	RECT rc;
	if (!GetUpdateRect(&rc)) return;
	PAINTSTRUCT paint;
	CDC *pDC = BeginPaint(&paint);
	CRect rect;
	GetClientRect(rect);
	pDC->Draw3dRect(&rect,
				  ::GetSysColor(COLOR_BTNHIGHLIGHT),
				  ::GetSysColor(COLOR_BTNSHADOW));
	EndPaint(&paint);
}
UINT CSplitterBar::OnNcHitTest(CPoint point) 
{	
	return HTCLIENT;
}
int CSplitterBar::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CWnd::OnCreate(lpCreateStruct) == -1)
		return -1;
	
	GetWindowRect(&m_rectSplitter);
	SetWindowPos(&CWnd::wndTop,0,0,0,0,SWP_NOMOVE|SWP_NOSIZE);
	//Initialize left most and right most coordinator
	CRect rectParent;
	GetParent()->GetClientRect(rectParent);
	m_rectPosition = rectParent;
	
	return 0;
}
BOOL CSplitterBar::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message) 
{
	CPoint ptCursor=GetMessagePos();		
	if(IsCursorOverSplitter(ptCursor))
	{
		::SetCursor(::LoadCursor(AfxGetInstanceHandle(), MAKEINTRESOURCE(IDC_CURWE)));
		return TRUE;
	}
	return CWnd::OnSetCursor(pWnd, nHitTest, message);
}
BOOL CSplitterBar::IsCursorOverSplitter( const CPoint& ptCursor )
{
	CRect rectSplitter;
	GetWindowRect(rectSplitter);
	return rectSplitter.PtInRect( ptCursor );
}
void CSplitterBar::OnMouseMove(UINT nFlags, CPoint point) 
{
	if(nFlags & MK_LBUTTON && m_bDragging)
	{
		DrawDraggingBar(point);
		return;
	}
	CWnd::OnMouseMove(nFlags, point);
}
void CSplitterBar::OnLButtonDown(UINT nFlags, CPoint point) 
{	
	ClientToScreen(&point);
	if(IsCursorOverSplitter(point))
	{
		SetCapture();
		m_bDragging=TRUE;
		GetWindowRect(&m_rectSplitter);		
		ScreenToClient(&point);
		DrawDraggingBar(point,DRAG_ENTER);
		return;
	}
	
	CWnd::OnLButtonDown(nFlags, point);
}
void CSplitterBar::OnLButtonUp(UINT nFlags, CPoint point) 
{
	if(m_bDragging)
	{
		DrawDraggingBar(point,DRAG_EXIT);
		//Move the splitter here
		ClientToScreen(&point);
		//with in client area?
		CPoint pointLeftMost;
		pointLeftMost.x=m_rectPosition.left;
		GetParent()->ClientToScreen(&pointLeftMost);
		CPoint pointRightMost;
		pointRightMost.x=m_rectPosition.right;
		GetParent()->ClientToScreen(&pointRightMost);
		if(point.x < pointLeftMost.x)
			point.x=pointLeftMost.x;
		if(point.x > pointRightMost.x)
			point.x=pointRightMost.x;
		m_rectDragCurt=m_rectSplitter;
		m_rectDragCurt.left=point.x;
		m_rectDragCurt.right=point.x+m_rectSplitter.Width();
		GetParent()->ScreenToClient(m_rectDragCurt);
		MoveWindow(m_rectDragCurt,TRUE);
		OnPaint();
		ReleaseCapture();
		m_bDragging=FALSE;
		MovePanes();
		GetParent()->SendMessage(WM_SPLITTER_MOVED,0,0L);
	}
	
	CWnd::OnLButtonUp(nFlags, point);
}
void CSplitterBar::DrawDraggingBar(CPoint point,DRAGFLAG df)
{
	ClientToScreen(&point);
	m_rectDragCurt=m_rectSplitter;
	m_rectDragCurt.left=point.x;
	m_rectDragCurt.right=point.x+m_rectSplitter.Width();
	CSize size(m_rectDragCurt.Width(),m_rectDragCurt.Height());
	CWnd *pParentWnd=GetParent();
	ASSERT(pParentWnd);
	CDC *pDC=pParentWnd->GetDC();	
	pParentWnd->ScreenToClient(m_rectDragCurt);
	switch(df)
	{
	case DRAG_ENTER:
		 pDC->DrawDragRect(m_rectDragCurt,size,NULL,size);
		 break;
	case DRAG_EXIT:	//fall through
	default:
		 pDC->DrawDragRect(m_rectDragCurt,size,m_rectDragPrev,size);
		 break;
	}
	pParentWnd->ReleaseDC(pDC);
	m_rectDragPrev=m_rectDragCurt;
}
void CSplitterBar::SetPanes(CWnd *pwndLeftPane,CWnd *pwndRightPane)
{
	ASSERT(pwndLeftPane);
	ASSERT(pwndRightPane);
	m_pwndLeftPane=pwndLeftPane;
	m_pwndRightPane=pwndRightPane;
	//Initialize splitter bar position & size
	CRect rectBar = m_rectPosition;
	rectBar.right = rectBar.right>>1;
	rectBar.left = rectBar.right;
	int nBarWidth=GetSystemMetrics(SM_CYFRAME);
	rectBar.left-=nBarWidth;
	rectBar.right+=nBarWidth;
	MoveWindow(rectBar);
	
	//repostion left & rigth panes
	MovePanes();
}
void CSplitterBar::MovePanes()
{
	ASSERT(m_pwndLeftPane);
	ASSERT(m_pwndRightPane);
	//Get position of the splitter bar
	CRect rectBar;
	GetWindowRect(rectBar);
	GetParent()->ScreenToClient(rectBar);
	//reposition left pane
	CRect rectLeft(m_rectPosition.left, rectBar.top, rectBar.left, rectBar.bottom);
	m_pwndLeftPane->MoveWindow(rectLeft);
	//reposition right pane
	CRect rectRight(rectBar.right, rectBar.top, m_rectPosition.right, rectBar.bottom);
	m_pwndRightPane->MoveWindow(rectRight);
	//repaint client area
	GetParent()->Invalidate();
}
VOID CSplitterBar::SetPosition(LPCRECT lpRect)
{
	m_rectPosition = *lpRect;
	CRect rectBar = m_rectPosition;
	rectBar.right = rectBar.right>>1;
	rectBar.left = rectBar.right;
	int nBarWidth=GetSystemMetrics(SM_CYFRAME);
	rectBar.left-=nBarWidth/2;
	rectBar.right+=nBarWidth/2;
	MoveWindow(rectBar);
//	m_rectPosition = rectBar;
	MovePanes();
}

						