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Visual C++

WBWnd.cpp：源码内容
							// WBWnd.cpp: implementation of the CWBWnd class.
//
//////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "..WB.h"
#include "WBWnd.h"
#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////
CWBWnd::CWBWnd( CDrawView * view , bool m_bRect , bool m_bCapture ) : CDraw( view ) , CDialog( IDD_CAPTURE_DIALOG )
{
	//{{AFX_DATA_INIT(CWBWnd)
	//}}AFX_DATA_INIT
	this->m_bDown = false;
	this->type = WBWND;
	this->screenDC = NULL;
	this->m_bRect = m_bRect;
	if( this->pen.GetSafeHandle( ) )
		this->pen.DeleteObject( );
	this->pen.CreatePen( PS_DOT , 1 , RGB( 0 , 0 , 0 ) );
	if( this->brush.GetSafeHandle( ) )
		this->brush.DeleteObject( );
	this->brush.CreateStockObject( NULL_BRUSH );
    //如果是选择
	if( this->m_bRect )
	{
		::Sleep( 100 );
		this->DoModal( );
	}
	else if( m_bCapture )
		this->view->SetCapture( );
}
CWBWnd::~CWBWnd( )
{
}
void CWBWnd::DoDataExchange(CDataExchange* pDX)
{
	CDialog::DoDataExchange(pDX);
	//{{AFX_DATA_MAP(CWBWnd)
	//}}AFX_DATA_MAP
}
BEGIN_MESSAGE_MAP(CWBWnd, CDialog)
	//{{AFX_MSG_MAP(CWBWnd)
	//}}AFX_MSG_MAP
END_MESSAGE_MAP()
BOOL CWBWnd::OnInitDialog( ) 
{
	CDialog::OnInitDialog( );
	::SetClassLong( this->GetSafeHwnd( ) , GCL_HCURSOR , ( long )::AfxGetApp( )->LoadStandardCursor( MAKEINTRESOURCE( IDC_CROSS ) ) );
	//移动窗口
	this->MoveWindow( 0 , 0 , ::GetSystemMetrics( SM_CXSCREEN ) , ::GetSystemMetrics( SM_CYSCREEN ) );
	//把桌面的的图形捕捉过来
	::Sleep( 100 );
	CWindowDC dc( CWnd::GetDesktopWindow( ) );
	this->screenDC = new CMemDC( &dc , false );
	return TRUE;
}
LRESULT CWBWnd::WindowProc(UINT message, WPARAM wParam, LPARAM lParam) 
{
	switch( message )
	{
	case WM_LBUTTONDOWN :
		{
			this->start.x = LOWORD(lParam);
			this->start.y = HIWORD(lParam);
		}
		break;
	case WM_MOUSEMOVE :
		if( wParam & MK_LBUTTON )
		{
			this->end.x = LOWORD(lParam);
			this->end.y = HIWORD(lParam);
			this->Invalidate( );
		}
		break;
		
	case WM_LBUTTONUP :
		{
			if( this->wndBitmap.GetSafeHandle( ) ) this->wndBitmap.DeleteObject( );
			
			if( this->wndDC.GetSafeHdc( ) )	this->wndDC.DeleteDC( );
			this->wndDC.CreateCompatibleDC( this->screenDC );
			CRect rc( this->start , this->end );
			this->wndBitmap.CreateCompatibleBitmap( this->screenDC , rc.Width( ) , rc.Height( ) );
			
			this->wndDC.SelectObject( &this->wndBitmap );
			
			this->wndDC.BitBlt( 0 , 0 , rc.Width( ) , rc.Height( ) , this->screenDC , rc.left  , rc.top , SRCCOPY );
			
			if( this->rgn.GetSafeHandle( ) )
				
				this->rgn.DeleteObject( );
			
			this->rgn.CreateRectRgn( 0 , 0 , rc.Width( ) , rc.Height( ) );
			
			CPoint point = this->view->GetScrollPosition( );
			
			this->rgn.OffsetRgn( point );
			delete this->screenDC; this->screenDC = NULL;
			this->SendMessage( WM_CLOSE );
			this->Draw( );
			this->view->Invalidate( );
			::Sleep( 100 );
			this->view->PostMessage( WM_LBUTTONUP , wParam , MAKEWPARAM( point.x , point.y ) );
		}
		break;
	case WM_PAINT :
		if( this->screenDC )
		{
			CPaintDC dc( this );
			dc.BitBlt( 0 , 0 , ::GetSystemMetrics( SM_CXSCREEN ) , ::GetSystemMetrics( SM_CYSCREEN ) , this->screenDC , 0 , 0 , SRCCOPY );
			if( this->start != this->end ) 
			{
				CMemDC memDC( &dc );
				CRect rc( this->start , this->end );
				memDC.SelectObject( &this->pen );
				memDC.SelectObject( &this->brush );
				memDC.Rectangle( &rc );				
			}
		}
		break;
	case WM_ERASEBKGND :
		return true;
	}
	return CDialog::WindowProc(message, wParam, lParam);
}
void CWBWnd::LButtonDown( UINT nFlags , CPoint point )
{
}
void CWBWnd::LButtonUp( UINT nFlags , CPoint point )
{
	if( ! this->m_bRect )
	{
		this->CaptureBitmap( );
		
		::ReleaseCapture( );
	}
}
void CWBWnd::MouseMove( UINT nFlags , CPoint point )
{
}
CDC * CWBWnd::Draw( CDC * pDC )
{
	if( pDC == NULL )
		pDC = this->view->GetMemDC( );
	if( this->rgn.GetSafeHandle( ) )
	{
		CRect rc;
		this->rgn.GetRgnBox( &rc );
		if( ! this->wndDC.GetSafeHdc( ) && this->wndBitmap.GetSafeHandle( ) )
		{
			this->wndDC.CreateCompatibleDC( pDC );
			this->wndDC.SelectObject( &this->wndBitmap );
		}
		pDC->BitBlt( rc.left , rc.top , rc.Width( ) , rc.Height( ) , &this->wndDC , 0 , 0 , SRCCOPY );
	}
	return pDC;
}
void CWBWnd::CaptureBitmap( void )
{
	if( this->wndBitmap.GetSafeHandle( ) )
		this->wndBitmap.DeleteObject( );
	if( this->wndDC.GetSafeHdc( ) )
		this->wndDC.DeleteDC( );
	CPoint point;
	::GetCursorPos( &point );
	CWnd * pWnd = CWnd::WindowFromPoint( point );
	if( ! pWnd )
		pWnd = CWnd::GetDesktopWindow( );
	CWindowDC dc( pWnd );
	
	this->wndDC.CreateCompatibleDC( &dc );
	
	CRect rc;
	
	pWnd->GetWindowRect( &rc );
	
	this->wndBitmap.CreateCompatibleBitmap( &dc , rc.Width( ) , rc.Height( ) );
	
	this->wndDC.SelectObject( &this->wndBitmap );
	
	this->wndDC.BitBlt( 0 , 0 , rc.Width( ) , rc.Height( ) , &dc , 0 , 0 , SRCCOPY );
	
	if( this->rgn.GetSafeHandle( ) )
		
		this->rgn.DeleteObject( );
	
	this->rgn.CreateRectRgn( 0 , 0 , rc.Width( ) , rc.Height( ) );
	
	point = this->view->GetScrollPosition( );
	
	this->rgn.OffsetRgn( point );
	
	this->Draw( );
	
	this->view->Invalidate( );
}
CBitmap * CWBWnd::GetBitmap( void )
{
	if( ! this->wndBitmap.GetSafeHandle( ) )
	{
		if( ! this->rgn.GetSafeHandle( ) )
			return NULL;
		CRect rc;
		this->rgn.GetRgnBox( &rc );
		this->wndBitmap.CreateCompatibleBitmap( this->view->GetMemDC( ) , rc.Width( ) , rc.Height( ) );
	}
	return & this->wndBitmap;
}

						