flowchartlinesegment.cpp

大家用过UML的流程图设计器吧

/* ==========================================================================
	CFlowchartLineSegment

	Author :		Johan Rosengren, Abstrakt Mekanik AB

	Date :			2004-04-29

	Purpose :		CFlowchartLineSegment represents a dotted line and is 
					derived from CDiagramLine.

	Description :	The class implements a minimum amount of functionality - 
					drawing, cloning and creating from string.

	Usage :			Create with CFlowchartControlFactory::CreateFromString

   ========================================================================*/
#include "stdafx.h"
#include "FlowchartLineSegment.h"
#include "DiagramEditor\DiagramLine.h"

/////////////////////////////////////////////////////////////////////////////
// LinDDA prototypes - for hit-testing

VOID CALLBACK HitTest( int X, int Y, LPARAM data );
VOID CALLBACK HitTestRect( int X, int Y, LPARAM data );

/////////////////////////////////////////////////////////////////////////////
// CFlowchartLineSegment

CFlowchartLineSegment::CFlowchartLineSegment()
/* ============================================================
	Function :		CFlowchartLineSegment::CFlowchartLineSegment
	Description :	constructor
					
	Return :		void
	Parameters :	none

	Usage :			

   ============================================================*/
{

	SetMinimumSize( CSize( -1, -1 ) );
	SetType( _T( "flowchart_line" ) );
	SetTitle( _T( "" ) );

	SetPropertyDialog( &m_dlg, CPropertyDialog::IDD );

}

CFlowchartLineSegment::~CFlowchartLineSegment()
/* ============================================================
	Function :		CFlowchartLineSegment::~CFlowchartLineSegment
	Description :	destructor
					
	Return :		void
	Parameters :	none

	Usage :			

   ============================================================*/
{

	if( m_dlg.m_hWnd )
		m_dlg.DestroyWindow();

}

CDiagramEntity* CFlowchartLineSegment::Clone()
/* ============================================================
	Function :		CFlowchartLineSegment::Clone
	Description :	Clone this object to a new object.
					
	Return :		CDiagramEntity*	-	The new object.
	Parameters :	none

	Usage :			Call to create a clone of the object. The 
					caller will have to delete the object.

   ============================================================*/

{

	CFlowchartLineSegment* obj = new CFlowchartLineSegment;
	obj->Copy( this );
	return obj;
}

void CFlowchartLineSegment::Draw( CDC* dc, CRect rect )
/* ============================================================
	Function :		CFlowchartLineSegment::Draw
	Description :	Draws the object.

	Return :		void
	Parameters :	CDC* dc		-	The CDC to draw to. 
					CRect rect	-	The real rectangle of the 
									object.

	Usage :			The function should clean up all selected 
					objects. Note that the CDC is a memory CDC, 
					so creating a memory CDC in this function 
					will probably not speed up the function.

   ============================================================*/
{

	CPen pen( PS_DASH, 0, RGB( 0, 0, 0 ) );
	dc->SelectObject( &pen );
	dc->SelectStockObject( BLACK_BRUSH );

	dc->MoveTo( rect.TopLeft() );
	dc->LineTo( rect.BottomRight() );

	dc->SelectStockObject( BLACK_PEN );

	CString str = GetTitle();
	if( str.GetLength() )
	{
		CFont font;
		font.CreateFont( -round( 12.0 * GetZoom() ), 0,0,0,FW_NORMAL,0,0,0,0,0,0,0,0,_T( "Courier New" ) );
		dc->SelectObject( &font );
		int mode = dc->SetBkMode( TRANSPARENT );

		CRect rectTemp( rect );
		rectTemp.NormalizeRect();
		int cy = round( 14.0 * GetZoom() );
		int cut = round( ( double ) GetMarkerSize().cx * GetZoom() / 2 );
		CRect r( rect.right - cut, rect.top, rect.right - ( rectTemp.Width() + cut ), rect.bottom );
		if(rect.top==rect.bottom)
		{
			CRect r( rect.left, rect.top - ( cy + cut ), rect.right, rect.bottom );
			r.NormalizeRect();
			dc->DrawText( str, r, DT_NOPREFIX | DT_SINGLELINE | DT_VCENTER | DT_CENTER );
		}
		else
		{
			CRect r( rect.right - cut, rect.top, rect.right - ( cy * str.GetLength() + cut ), rect.bottom );
			r.NormalizeRect();
			dc->DrawText( str, r, DT_NOPREFIX | DT_SINGLELINE | DT_VCENTER | DT_RIGHT );
		}

		dc->SelectStockObject( DEFAULT_GUI_FONT );
		dc->SetBkMode( mode );

	}

}

CDiagramEntity* CFlowchartLineSegment::CreateFromString( const CString& str )
/* ============================================================
	Function :		CFlowchartLineSegment::CreateFromString
	Description :	Static factory function that creates and 
					returns an instance of this class if str 
					is a valid representation.
					
	Return :		CDiagramEntity*		-	The object, or NULL 
											if str is not a 
											representation of 
											this type.
	Parameters :	const CString& str	-	The string to create 
											from.
					
	Usage :			Can be used as a factory for text file loads. 
					Each object type should have its own 
					version - the default one is a model 
					implementation.

   ============================================================*/
{

	CFlowchartLineSegment* obj = new CFlowchartLineSegment;
	if(!obj->FromString( str ) )
	{
		delete obj;
		obj = NULL;
	}

	return obj;

}