drawview.cpp

电子白板程序

// DrawView.cpp : implementation file
//

#include "stdafx.h"
#include "DrawView.h"
#include "WB.h"
#include "DrawFrame.h"
#include "MemDC.h"

#include "Select.h"
#include "Line.h"
#include "WBPen.h"
#include "Rectangle.h"
#include "RoundRect.h"
#include "Circle.h"
#include "Text.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

#define FIRST_SCROLL_BUTTON 1000
#define LAST_SCROLL_BUTTON  1016

#define SELECT_DRAW( cls , empty )\
{\
	DRAW d;\
	memset( &d , 0 , sizeof( DRAW ) );\
	d.pen.lopnWidth = CPoint( 1 , 1 );\
    if( draw )\
	{\
		d.page = draw->GetProp().page;\
	    d.pen = draw->GetProp().pen;\
	    d.brush = draw->GetProp().brush;\
		delete draw ;\
	}\
	draw = new cls(*this);\
	d.tag = draw->GetProp().tag;\
	memcpy( &draw->GetProp() , &d , sizeof( DRAW ) );\
    draw->GetProp().brush.lbStyle = empty ? BS_NULL : BS_SOLID;\
	draw->GetProp().pen.lopnWidth = d.pen.lopnWidth;\
	draw->GetProp().page = this->page;\
	this->Invalidate();\
	TRACE("select %s object\n" , #cls );\
}

#define DRAW_EVENT( event , flag , pt )\
{\
    if( draw )\
	{\
	    pt.Offset( GetScrollPosition( ) );\
	    draw->##event(flag,pt);\
		TRACE( "event:%s(%d,%d)\n" , #event , pt.x , pt.y );\
	}\
}

#define SHOW_POS( pt )\
{\
	CString s;\
	CPoint p = pt;\
	p.Offset( GetScrollPosition( ) );\
	s.Format( "x : %d , y : %d" , p.x , p.y );\
	GetFrame().GetBar().GetStatic().SetWindowText( s );\
	GetFrame().GetBar().GetToolBarCtrl().EnableButton( ID_SAVE , ! GetDrawMap().empty() );\
}
/////////////////////////////////////////////////////////////////////////////
// CDrawView
CDrawView::CDrawView( CDrawFrame * pFrame )
{
	this->send_threadid = 0;
	
	this->capture = false;

	this->page = 1;

	this->username = "";

	this->OnWB = NULL;

	this->pContext = NULL;

	this->Create( NULL , NULL , AFX_WS_DEFAULT_VIEW | WS_CLIPCHILDREN , CRect( 0 , 0 , 0 , 0 ) , pFrame , AFX_IDW_PANE_FIRST , NULL );

	this->draw = NULL;

	this->m_bDraw = FALSE;

	this->OnTool( ID_DRAW_LINE );
}

CDrawView::~CDrawView()
{	
	if( this->draw ) delete this->draw;

	DRAW_MAP::iterator itr;

	while( ! this->GetDrawMap().empty( ) )
	{
		itr = this->GetDrawMap().begin();

		delete itr->second;

		this->GetDrawMap().erase( itr );
	}
}


BEGIN_MESSAGE_MAP(CDrawView, CScrollView)
	//{{AFX_MSG_MAP(CDrawView)
	ON_WM_CREATE()
	ON_WM_CONTEXTMENU()
	ON_WM_LBUTTONDOWN()
	ON_WM_MOUSEMOVE()
	ON_WM_LBUTTONUP()
	ON_COMMAND(ID_COLOR, OnColor)
	ON_WM_ERASEBKGND()
	ON_WM_DESTROY()
	ON_COMMAND(ID_OPEN, OnOpen)
	ON_COMMAND(ID_SAVE, OnSave)
	ON_WM_SETCURSOR()
	//}}AFX_MSG_MAP
	ON_COMMAND_RANGE( ID_DRAW_LINE , ID_DRAW_DELETE , OnTool )
	ON_COMMAND_RANGE( ID_LINE_1_PIXEL , ID_LINE_4_PIXEL , OnLine )
	ON_MESSAGE( WM_PARSE_DATA , OnParse )
	ON_COMMAND_RANGE( FIRST_SCROLL_BUTTON , LAST_SCROLL_BUTTON , OnScrollButton)
	ON_NOTIFY_REFLECT_EX( NM_COOLSB_CUSTOMDRAW , OnScrollNotify)
	ON_CBN_SELCHANGE( ID_LINETYPE , OnLine )
	ON_CBN_SELCHANGE( ID_COLOR , OnColor )
END_MESSAGE_MAP()

/////////////////////////////////////////////////////////////////////////////
// CDrawView drawing
void CDrawView::OnDraw(CDC* pDC)
{	//双缓冲绘图
	CMemDC dc( pDC );
	//显示列表中存在的图元
	for( DRAW_MAP::iterator itr = this->GetDrawMap().begin( ); itr != this->GetDrawMap().end( ); itr ++ )
		
		if( itr->second->GetProp().page == this->page )
			
			itr->second->OnDraw( &dc );
	//显示正在画的图元
	if( this->draw->GetProp().page == this->page )
		
		this->draw->OnDraw( &dc );
}
//更新所有背景
BOOL CDrawView::OnEraseBkgnd(CDC* pDC) 
{
	return TRUE;
}
//创建窗口
int CDrawView::OnCreate(LPCREATESTRUCT lpCreateStruct) 
{
	if (CScrollView::OnCreate(lpCreateStruct) == -1)
		return -1;
	//滚动条设置
	InitializeCoolSB( this->GetSafeHwnd() );
	
	CoolSB_SetStyle(m_hWnd, SB_BOTH, CSBS_NORMAL );

	SCROLLBUT btn;
	btn.fMask	   = SBBF_ID | SBBF_TYPE | SBBF_SIZE | SBBF_PLACEMENT;
	btn.uCmdId	   = FIRST_SCROLL_BUTTON;
	btn.nSize	   = -1;
	btn.uPlacement = SBBP_LEFT;
	btn.uButType   = SBBT_PUSHBUTTON | SBBM_LEFTARROW;
	CoolSB_InsertButton( this->GetSafeHwnd() , SB_HORZ, (UINT)-1, &btn);
	
	btn.fMask	   = SBBF_ID | SBBF_TYPE | SBBF_SIZE | SBBF_PLACEMENT;
	btn.uCmdId	   = FIRST_SCROLL_BUTTON + 1;
	btn.nSize	   = -1;
	btn.uPlacement = SBBP_LEFT;
	btn.uButType   = SBBT_PUSHBUTTON | SBBM_RIGHTARROW;
	CoolSB_InsertButton( this->GetSafeHwnd() , SB_HORZ, (UINT)-1, &btn);
	
	btn.fMask	   = SBBF_ID | SBBF_TYPE | SBBF_SIZE | SBBF_PLACEMENT;
	btn.uCmdId	   = FIRST_SCROLL_BUTTON + 2;
	btn.nSize	   = 120;
	btn.uPlacement = SBBP_LEFT;
	btn.uButType   = SBBT_OWNERDRAW | SBBM_RESIZABLE;
	btn.nMinSize   = 0;
	btn.nMaxSize   = (UINT)-1;
	CoolSB_InsertButton( this->GetSafeHwnd() , SB_HORZ, (UINT)-1, &btn);

	btn.fMask	   = SBBF_ID | SBBF_TYPE | SBBF_SIZE | SBBF_PLACEMENT | SBBF_CURSOR;
	btn.uCmdId	   = FIRST_SCROLL_BUTTON + 3;
	btn.nSize	   = 7;
	btn.uPlacement = SBBP_LEFT;
	btn.uButType   = SBBT_FIXED;
	btn.hCurs      = ::AfxGetApp()->LoadStandardCursor( IDC_SIZEWE );
	CoolSB_InsertButton(this->GetSafeHwnd(), SB_HORZ, (UINT)-1, &btn);
	//设定工作区大小
	this->SetScrollSizes( MM_TEXT , CSize( 2034 , 2034 ) );
	//初始化菜单
	this->menu.LoadMenu( IDR_TOOL_MENU );
	//创建发送线程
	::CreateThread( NULL , 0 , CDrawView::OnSend , this , 0 , &this->send_threadid );

	return 0;
}
//取得主框架框窗口
CDrawFrame & CDrawView::GetFrame( void )
{
	return *( CDrawFrame * )this->GetParent();
}
//菜单弹出函数
void CDrawView::OnContextMenu(CWnd* pWnd, CPoint point) 
{
	if( this->menu.GetSafeHmenu() )

		this->menu.GetSubMenu( 0 )->TrackPopupMenu( TPM_RIGHTBUTTON | TPM_LEFTALIGN , point.x , point.y , this );
}
//鼠标按下
void CDrawView::OnLButtonDown(UINT nFlags, CPoint point) 
{
	CScrollView::OnLButtonDown(nFlags, point);
    //如果draw不是CText类的实例
	if( ! IsDescendant( this->draw , CText ) )
	{   //那么捕获鼠标事件
		this->SetCapture();
        //是否捕获标志
		this->capture = this->GetCapture() == this;
	}
	this->m_bDraw = true;

	DRAW_EVENT( OnLButtonDown , nFlags , point );
}

void CDrawView::OnMouseMove(UINT nFlags, CPoint point) 
{
	CScrollView::OnMouseMove(nFlags, point);

	SHOW_POS( point );

	if( this->m_bDraw || IsDescendant( this->draw , CSelect ) )
		
		DRAW_EVENT( OnMouseMove , nFlags , point );
}

void CDrawView::OnLButtonUp(UINT nFlags, CPoint point) 
{
	CScrollView::OnLButtonUp(nFlags, point);
	//鼠标等待
	CWaitCursor cursor;

	if( this->capture )

		::ReleaseCapture();

	if( this->m_bDraw )
	{
		DRAW_EVENT( OnLButtonUp , nFlags , point );

		this->m_bDraw = FALSE;
	}
	else
		
		return;
	//组合数据包，往外发送
	if( this->Assemble( this->draw ) )
	{	
		this->GetDrawMap()[ this->draw->GetId() ] = this->draw;
		//克隆一个图元信息
		this->draw = this->draw->Clone();
	}
	this->Invalidate();
}

void CDrawView::OnOpen() 
{
	CFileDialog dlg( TRUE , "wb" , NULL , OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT , "WB - WB file|*.wb||" );

	if( dlg.DoModal() == IDOK )
	{
		CFile file;

		if( file.Open( dlg.GetPathName() , CFile::modeRead ) )
		{
			int size;
			
			char * buffer;

			CString id;
			
			CDrawBase * d;
			
			DRAW draw;

			while( file.GetPosition() < file.GetLength() )
			{	//读取大小
				file.Read( &size , sizeof( int ) );
				//申请内存
				buffer = new char[ size ];
				//读取内存
				file.Read( buffer , size );
				//解析数据
				id = buffer;
				
				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 )
				{
					d->Decode( buffer , size );
					//清除id
					d->SetId( NULL );

					this->GetDrawMap()[ d->GetId() ] = d;
					//组合数据往外发送
					this->Assemble( d );
				}
				delete []buffer;
			}
			file.Close();
			//刷新
			this->Invalidate();
		}
	}
}

void CDrawView::OnSave() 
{	
	CFileDialog dlg( FALSE , "wb" , NULL , OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT , "WB - WB file|*.wb|BMP - Windows bitmap|*.bmp||" );
	
	if( dlg.DoModal() == IDOK )
	{
		CFile file;
		
		if( file.Open( dlg.GetPathName() , CFile::modeCreate | CFile::modeWrite ) )
		{	
			if( ! dlg.GetFileExt( ).CompareNoCase( "wb" ) )
			{//大小
				int size;