drawview.cpp

电子白板程序

				//数据
				char * buf;
				
				for( DRAW_MAP::iterator itr = this->GetDrawMap().begin(); itr != this->GetDrawMap().end(); itr ++ )
				{
					buf = itr->second->Encode( size );
					
					if( buf )
					{	//数据大小
						file.Write( &size , sizeof( int ) );
						//数据
						file.Write( buf , size );
						//删除数据
						delete []buf;
					}
				} 
			}
//			else if( this->memBMP.GetSafeHandle() )
//			{
//				BITMAP bm;
//				
//				this->memBMP.GetBitmap( &bm );
//				
//				BITMAPINFOHEADER h = 
//				{
//					sizeof( h ) , bm.bmWidth , bm.bmHeight , 1 , bm.bmBitsPixel * bm.bmPlanes , BI_RGB , ( 31 + h.biWidth * h.biHeight * h.biBitCount ) / 8 , 0 , 0 , 0 , 0 
//				};
//				BITMAPFILEHEADER fh =
//				{
//					0x4d42 , sizeof( fh ) + sizeof( h ) + h.biSizeImage , 0 , 0 , sizeof( h )
//				};
//				char * buffer = new char[ h.biSizeImage ];
//				
//				::GetDIBits( this->memDC.GetSafeHdc( ) , this->memBMP , 0 , h.biHeight , buffer , ( BITMAPINFO * )&h , DIB_RGB_COLORS );
//				//位图头文件
//				file.Write( &fh , sizeof( fh ) );
//				//位图头信息
//				file.Write( &h , sizeof( h ) );
//				//位图数据
//				file.Write( buffer , h.biSizeImage );
//
//				delete []buffer;
//			}
			file.Close();
		}
	}
}

void CDrawView::OnColor() 
{
	int color = 0;

	if( ! this->GetCurrentMessage()->lParam )
	{
		CColorDialog dlg;

		if( dlg.DoModal() != IDOK )

			return;

		color = dlg.GetColor();
	}
	else
		
		color = this->GetFrame().GetBar().GetColorCombo().GetSelectedValue();
	
	this->draw->GetProp().pen.lopnColor = this->draw->GetProp().brush.lbColor = color;

	for( DRAW_MAP::iterator itr = this->GetDrawMap().begin(); itr != this->GetDrawMap().end(); itr ++ )

		if( itr->second->IsSelect() )
		{
			itr->second->GetProp().pen.lopnColor = color;
				
			itr->second->GetProp().brush.lbColor = color;
		}
	//组合数据往网络发送
	if( IsDescendant( this->draw , CSelect ) )

		this->Assemble( this->draw );
	
	this->Invalidate();
}

void CDrawView::OnTool( UINT id )
{
	static int item = ID_DRAW_LINE;

	if( item )
	{ 
		this->menu.CheckMenuItem( item | MF_BYCOMMAND , MF_UNCHECKED ); 

		if( this->GetFrame().GetBar().GetToolBarCtrl() )
			
			this->GetFrame().GetBar().GetToolBarCtrl().CheckButton( item , FALSE );
	}
	item = id;

	this->menu.CheckMenuItem( item | MF_BYCOMMAND , MF_CHECKED ); 

	if( this->GetFrame().GetBar().GetToolBarCtrl() )
		
		this->GetFrame().GetBar().GetToolBarCtrl().CheckButton( item , TRUE );

	switch( id )
	{
	case ID_DRAW_LINE : SELECT_DRAW( CLine , false ); break;

	case ID_DRAW_PEN  : SELECT_DRAW( CWBPen , false ); break;

	case ID_DRAW_EMPTYRECT : SELECT_DRAW( CRectangle , true ); break;

	case ID_DRAW_SOLIDRECT : SELECT_DRAW( CRectangle , false ); break;

	case ID_DRAW_EMPTYROUNDRECT : SELECT_DRAW( CRoundRect , true );break;

	case ID_DRAW_SOLIDROUNDRECT : SELECT_DRAW( CRoundRect , false ); break;

	case ID_DRAW_EMPTYCIRCLE : SELECT_DRAW( CCircle , true ); break;

	case ID_DRAW_SOLIDCIRCLE : SELECT_DRAW( CCircle , false ); break;

	case ID_DRAW_FONT : SELECT_DRAW( CText , false ); break;

	case ID_DRAW_SELECT : SELECT_DRAW( CSelect , false ); break;

	case ID_DRAW_DELETE : SELECT_DRAW( CSelect , true ); break;
	}
}

BOOL CDrawView::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message) 
{	//更改鼠标形状
	if( this->draw && nHitTest == HTCLIENT )
	{
		::SetCursor( this->draw->GetCursor() );

		return TRUE;
	}
	return CScrollView::OnSetCursor(pWnd, nHitTest, message);
}

void CDrawView::OnLine( UINT id )
{
	int line;

	if( ! this->GetCurrentMessage()->lParam )
	{
		static int item = ID_LINE_1_PIXEL;
		
		if( item ) this->menu.CheckMenuItem( item | MF_BYCOMMAND , MF_UNCHECKED ); 
		
		item = id;
		
		this->menu.CheckMenuItem( item | MF_BYCOMMAND , MF_CHECKED ); 
		
		line = id - ID_LINE_1_PIXEL + 1;
	}
	else

		line = this->GetFrame().GetBar().GetLineTypeCombo().GetSelectedValue();

	this->draw->GetProp().pen.lopnWidth = CPoint( line , line );
	
	for( DRAW_MAP::iterator itr = this->GetDrawMap().begin(); itr != this->GetDrawMap().end(); itr ++ )

		if( itr->second->IsSelect() )

			itr->second->GetProp().pen.lopnWidth = CPoint( line , line );
	//组合数据往网络发送
	if( IsDescendant( this->draw , CSelect ) )
		
		this->Assemble( this->draw );
    //刷新
	this->Invalidate();
}
//组合数据
bool CDrawView::Assemble( CDrawBase * draw )
{
	int size;

	char * buffer = draw->Encode( size );
	
	if( buffer )

		::PostThreadMessage( this->send_threadid , WM_THREAD_SEND , ( WPARAM )buffer , ( LPARAM )size );

	return ! IsDescendant( draw , CSelect );
}
//发送线程
DWORD WINAPI CDrawView::OnSend( void * pContext )
{
	CDrawView * pThis = ( CDrawView * )pContext;

	MSG msg;

	char * buffer;

	while( ::GetMessage( &msg , NULL , 0 , 0 ) )
	{	//通过消息获得要发送的数据包
		if( msg.message == WM_THREAD_SEND )
		{
			buffer = ( char * )msg.wParam;
			
			if( buffer )
			{
				if( pThis->OnWB )
					
					pThis->OnWB( pThis->pContext , pThis->GetParent()->GetSafeHwnd() , buffer , msg.lParam );
				//清除Post过来的数据
				delete []buffer;
			}
		}
	}
	return 0;
}

void CDrawView::OnParse( WPARAM wParam , LPARAM lParam )
{
	char * buffer = ( char * )wParam;

	int size = lParam;

	CString id = buffer;
	//the id of CSelect Object is Empty
	if( id.IsEmpty() )
	{
		CSelect s( * this );

		s.Decode( buffer , size );
	}//Add a new Object
	else if( this->GetDrawMap().find( id ) == this->GetDrawMap().end() )
	{
		CDrawBase * d = NULL;

		DRAW draw;

		memcpy( &draw , buffer + id.GetLength() + 1 , sizeof( DRAW ) );
		
		switch( draw.tag )
		{
		case CDrawBase::LINE : d = new CLine( * this ); break;
		case CDrawBase::PEN : d = new CWBPen( * this ); break;
		case CDrawBase::RECT : d = new CRectangle( * this ); break;
		case CDrawBase::ROUNDRECT : d = new CRoundRect( * this ); break;
		case CDrawBase::CIRCLE : d = new CCircle( * this ); break;
		case CDrawBase::TEXT : d = new CText( * this ); break;
		}
		if( d )
		{
			if( d->Decode( buffer , size ) )
				
				this->GetDrawMap()[ d->GetId() ] = d;

			else

				delete d;
		}
	}//清除Post过来的数据
	delete []buffer;
	//刷新
	this->Invalidate();
}

void CDrawView::OnScrollButton( UINT id )
{
	switch( id - FIRST_SCROLL_BUTTON )
	{
	case 0 : this->page = this->page > 1 ? this->page - 1 : 1; break;
	case 1 : this->page ++; break;
	case 2 : break;
	}
	this->Invalidate();

	if( this->draw )
		
		this->draw->GetProp().page = this->page;
}

BOOL CDrawView::OnScrollNotify( NMCSBCUSTOMDRAW *nm , LRESULT* result )
{
	if( nm->nBar == SB_INSBUT )
	{
		* result = CDRF_SKIPDEFAULT;

		CDC * pDC = CDC::FromHandle( nm->hdc );

		pDC->SetTextColor( RGB( 0 , 0 , 0 ) );

		pDC->SetBkMode( TRANSPARENT );

		CBrush nb( ::GetSysColor( COLOR_BTNFACE ) );

		pDC->SelectObject( & nb );

		int width = pDC->GetTextExtent( "00" ).cx + 6;
		//判断该长度能够显示多少个数字
		int number = ( nm->rect.right - nm->rect.left ) / width - 3;
        //起始位置 
		number = this->page - number;

		if( number < 1 ) number = 1;

		else if( number > this->page ) number = this->page;
		
		CString s;
		
		CRect rc;

		for( int i = nm->rect.left ; i < nm->rect.right ; i += width + 5 , number ++ )
		{
			if( number < 10 ) s.Format( "0%d", number );

			else              s.Format( "%d" , number );

			rc.SetRect( i - 1 , nm->rect.top , i + width + 5 , nm->rect.bottom );

			if( number == this->page )
			{
				pDC->FillSolidRect( &rc , RGB( 255 , 255 , 255 ) );

				pDC->MoveTo( rc.left , rc.top ); pDC->LineTo( rc.left , rc.bottom );

				pDC->MoveTo( rc.left , rc.bottom - 1 ); pDC->LineTo( rc.right , rc.bottom - 1 );
			}
			else
				
				pDC->Rectangle( rc );

			pDC->DrawText( s , &rc , DT_VCENTER | DT_CENTER );
		}
	}
	return TRUE;
}

void CDrawView::OnDestroy() 
{
	if( this->send_threadid )

		::PostThreadMessage( this->send_threadid , WM_QUIT , 0 , 0 );

	CScrollView::OnDestroy();
}