diagramentity.cpp

So you wanted to add a forms editor to your application? A dialog editor? Something that allows draw

						"DEHT_TOPRIGHT" Top-right corner
						"DEHT_BOTTOMLEFT" Bottom-left corner
						"DEHT_BOTTOMMIDDLE" Middle bottom-side
						"DEHT_BOTTOMRIGHT" Bottom-right corner
						"DEHT_LEFTMIDDLE" Middle left-side
						"DEHT_RIGHTMIDDLE" Middle right-side

   ============================================================*/
{
	HCURSOR cursor = NULL;
	switch( hit )
	{
		case DEHT_BODY:
			cursor = LoadCursor( NULL, IDC_SIZEALL );
		break;
		case DEHT_TOPLEFT:
			cursor = LoadCursor( NULL, IDC_SIZENWSE );
		break;
		case DEHT_TOPMIDDLE:
			cursor = LoadCursor( NULL, IDC_SIZENS );
		break;
		case DEHT_TOPRIGHT:
			cursor = LoadCursor( NULL, IDC_SIZENESW );
		break;
		case DEHT_BOTTOMLEFT:
			cursor = LoadCursor( NULL, IDC_SIZENESW );
		break;
		case DEHT_BOTTOMMIDDLE:
			cursor = LoadCursor( NULL, IDC_SIZENS );
		break;
		case DEHT_BOTTOMRIGHT:
			cursor = LoadCursor( NULL, IDC_SIZENWSE );
		break;
		case DEHT_LEFTMIDDLE:
			cursor = LoadCursor( NULL, IDC_SIZEWE );
		break;
		case DEHT_RIGHTMIDDLE:
			cursor = LoadCursor( NULL, IDC_SIZEWE );
		break;
	}
	return cursor;
}

void CDiagramEntity::DrawSelectionMarkers( CDC* dc, CRect rect ) const
/* ============================================================
	Function :		CDiagramEntity::DrawSelectionMarkers
	Description :	Draws the selection markers for the 
					object.
	Access :		Protected

					
	Return :		void
	Parameters :	CDC* dc		-	The "CDC" to draw to
					CRect rect	-	The real object rectangle.
					
	Usage :			"rect" is the true rectangle (zoomed) of the 
					object.

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

	// Draw selection markers
	CRect rectSelect;

	dc->SelectStockObject( BLACK_BRUSH );
	rectSelect = GetSelectionMarkerRect( DEHT_TOPLEFT, rect );
	dc->Rectangle( rectSelect );

	rectSelect = GetSelectionMarkerRect( DEHT_TOPMIDDLE, rect );
	dc->Rectangle( rectSelect );

	rectSelect = GetSelectionMarkerRect( DEHT_TOPRIGHT, rect );
	dc->Rectangle( rectSelect );

	rectSelect = GetSelectionMarkerRect( DEHT_BOTTOMLEFT, rect );
	dc->Rectangle( rectSelect );

	rectSelect = GetSelectionMarkerRect( DEHT_BOTTOMMIDDLE, rect );
	dc->Rectangle( rectSelect );

	rectSelect = GetSelectionMarkerRect( DEHT_BOTTOMRIGHT, rect );
	dc->Rectangle( rectSelect );

	rectSelect = GetSelectionMarkerRect( DEHT_RIGHTMIDDLE, rect );
	dc->Rectangle( rectSelect );

	rectSelect = GetSelectionMarkerRect( DEHT_LEFTMIDDLE, rect );
	dc->Rectangle( rectSelect );

}

CRect CDiagramEntity::GetSelectionMarkerRect( UINT marker, CRect rect ) const
/* ============================================================
	Function :		CDiagramEntity::GetSelectionMarkerRect
	Description :	Gets the selection marker rectangle for 
					marker, given the true object rectangle 
					"rect".
	Access :		Protected

					
	Return :		CRect		-	The marker rectangle
	Parameters :	UINT marker	-	The marker type ("DEHT_"-
									constants defined in 
									DiargramEntity.h)
					CRect rect	-	The object rectangle
					
	Usage :			"marker" can be one of the following:
						"DEHT_NONE" No hit-point
						"DEHT_BODY" Inside object body
						"DEHT_TOPLEFT" Top-left corner
						"DEHT_TOPMIDDLE" Middle top-side
						"DEHT_TOPRIGHT" Top-right corner
						"DEHT_BOTTOMLEFT" Bottom-left corner
						"DEHT_BOTTOMMIDDLE" Middle bottom-side
						"DEHT_BOTTOMRIGHT" Bottom-right corner
						"DEHT_LEFTMIDDLE" Middle left-side
						"DEHT_RIGHTMIDDLE" Middle right-side

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

	CRect rectMarker;
	int horz = m_markerSize.cx / 2;
	int vert = m_markerSize.cy / 2;

	switch( marker )
	{
		case DEHT_TOPLEFT:
			rectMarker.SetRect( rect.left - horz,
								rect.top - vert,
								rect.left + horz,
								rect.top + vert );
		break;

		case DEHT_TOPMIDDLE:
			rectMarker.SetRect( rect.left + ( rect.Width() / 2 ) - horz,
								rect.top - vert,
								rect.left + ( rect.Width() / 2 ) + horz,
								rect.top + vert );
		break;

		case DEHT_TOPRIGHT:
			rectMarker.SetRect( rect.right - horz,
								rect.top - vert,
								rect.right + horz,
								rect.top + vert );
		break;

		case DEHT_BOTTOMLEFT:
			rectMarker.SetRect( rect.left - horz,
								rect.bottom - vert,
								rect.left + horz,
								rect.bottom + vert );
		break;

		case DEHT_BOTTOMMIDDLE:
			rectMarker.SetRect( rect.left + ( rect.Width() / 2 ) - horz,
								rect.bottom - vert,
								rect.left + ( rect.Width() / 2 ) + horz,
								rect.bottom + vert );
		break;

		case DEHT_BOTTOMRIGHT:
			rectMarker.SetRect( rect.right - horz,
								rect.bottom - vert,
								rect.right + horz,
								rect.bottom + vert );
		break;

		case DEHT_LEFTMIDDLE:
			rectMarker.SetRect( rect.left - horz,
								rect.top + ( rect.Height() / 2 ) - vert,
								rect.left + horz,
								rect.top + ( rect.Height() / 2 ) + vert );
		break;

		case DEHT_RIGHTMIDDLE:
			rectMarker.SetRect( rect.right - horz,
								rect.top + ( rect.Height() / 2 ) - vert,
								rect.right + horz,
								rect.top + ( rect.Height() / 2 ) + vert );
		break;
	}

	return rectMarker;

}

void CDiagramEntity::SetParent( CDiagramEntityContainer * parent )
/* ============================================================
	Function :		CDiagramEntity::SetParent
	Description :	Set the container owning the object.
	Access :		Protected

	Return :		void
	Parameters :	CDiagramEntityContainer * parent	-	the 
															parent.
					
	Usage :			Call to set the parent of the object. 
					Objects must know their parent, to allow 
					copying etc. 

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

	m_parent = parent;

}

void CDiagramEntity::GetFont( LOGFONT& lf ) const
/* ============================================================
	Function :		CDiagramEntity::GetFont
	Description :	Returns the system GUI font in a "LOGFONT" 
					scaled to the zoom level of the object.
	Access :		Protected

					
	Return :		void
	Parameters :	LOGFONT& lf	-	The "LOGFONT" for the system
									GUI font.
					
	Usage :			Call to get the system font. Note that MS 
					Sans Serif will not scale below 8 points.

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

	HFONT hfont = ( HFONT ) ::GetStockObject( DEFAULT_GUI_FONT );
	CFont* font = CFont::FromHandle( hfont );
	font->GetLogFont( &lf );
	lf.lfHeight = round( static_cast< double >( lf.lfHeight ) * m_zoom );

}

CString CDiagramEntity::GetType() const
/* ============================================================
	Function :		CDiagramEntity::GetType
	Description :	Returns the object type.
	Access :		Public

	Return :		CString	-	The type of the object.
	Parameters :	none

	Usage :			Call to get the type of the object. The type 
					is used when saving and loading objects 
					to/from a text file.

   ============================================================*/
{
	return m_type;
}

void CDiagramEntity::SetType( CString type )
/* ============================================================
	Function :		CDiagramEntity::SetType
	Description :	Set the object type.
	Access :		Public

	Return :		void
	Parameters :	CString type	-	The type to set
					
	Usage :			Call to set the object type - normally in 
					the "ctor" of this object. The type is used 
					when saving and loading objects to/from a 
					text file.

   ============================================================*/
{
	m_type = type;
}

CString CDiagramEntity::GetTitle() const
/* ============================================================
	Function :		CDiagramEntity::GetTitle
	Description :	Gets the Title property
	Access :		Public

	Return :		CString	-	The current title
	Parameters :	none

	Usage :			Call to get the title of the object. Title 
					is a property that the object can use in
					whatever way it wants.

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

	return m_title;

}

void CDiagramEntity::SetTitle( CString title )
/* ============================================================
	Function :		CDiagramEntity::SetTitle
	Description :	Sets the Title property
	Access :		Public

	Return :		void
	Parameters :	CString title	-	The new title
					
	Usage :			Call to set the title of the object. Title 
					is a property that the object can use in
					whatever way it wants.

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

	m_title = title;

}

CString CDiagramEntity::GetName() const
/* ============================================================
	Function :		CDiagramEntity::GetName
	Description :	Gets the Name property
	Access :		Public

	Return :		CString	-	The current name
	Parameters :	none

	Usage :			Call to get the name of the object. Name is 
					a property that the object can use in
					whatever way it wants.


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

	return m_name;

}

void CDiagramEntity::SetName( CString name )
/* ============================================================
	Function :		CDiagramEntity::SetName
	Description :	Sets the Name property
	Access :		Public

	Return :		void
	Parameters :	CString name	-	The new name
					
	Usage :			Call to set the name of the object. Name is 
					a property that the object can use in
					whatever way it wants.

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

	m_name = name;

}

double CDiagramEntity::GetLeft() const
/* ============================================================
	Function :		CDiagramEntity::GetLeft
	Description :	Gets the left edge of the object rectangle
	Access :		Public

	Return :		double	-	Left position
	Parameters :	none

	Usage :			Call to get the left edge of the object. 
					Note that if minimum sizes are not set for 
					the object, the left edge might be bigger 
					than the right.
					The object coordinates are expressed as 
					double values to allow unlimited zoom.

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

	return m_left;

}

double CDiagramEntity::GetRight() const
/* ============================================================
	Function :		CDiagramEntity::GetRight
	Description :	Gets the right edge of the object 
					rectangle
	Access :		Public

	Return :		double	-	Right position
	Parameters :	none

	Usage :			Call to get the right edge of the object.
					Note that if minimum sizes are not set for 
					the object, the left edge might be bigger 
					than the right.
					The object coordinates are expressed as 
					double values to allow unlimited zoom.

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

	return m_right;

}

double CDiagramEntity::GetTop() const
/* ============================================================
	Function :		CDiagramEntity::GetTop
	Description :	Gets the top edge of the object rectangle
	Access :		Public

	Return :		double	-	Top position
	Parameters :	none

	Usage :			Call to get the top edge of the object.
					Note that if minimum sizes are not set for 
					the object, the top edge might be bigger 
					than the bottom.
					The object coordinates are expressed as 
					double values to allow unlimited zoom.

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

	return m_top;

}

double CDiagramEntity::GetBottom() const
/* ============================================================
	Function :		CDiagramEntity::GetBottom
	Description :	Gets the bottom edge of the object 
					rectangle
	Access :		Public

	Return :		double	-	Bottom postion
	Parameters :	none

	Usage :			Call to get the bottom edge of the object.
					Note that if minimum sizes are not set for 
					the object, the top edge might be bigger 
					than the bottom.
					The object coordinates are expressed as 
					double values to allow unlimited zoom.

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

	return m_bottom;

}

void CDiagramEntity::SetLeft( double left )
/* ============================================================
	Function :		CDiagramEntity::SetLeft
	Description :	Sets the left edge of the object rectangle
	Access :		Public

	Return :		void
	Parameters :	double left	-	New left position
					
	Usage :			Call to set the left edge of the object.
					The object coordinates are expressed as 
					double values to allow unlimited zoom.

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