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CFlowchartEditor - linking things in CDiagramEditor

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5 Jul 2006Public Domain8 min read 365.9K   33.9K   278  
A flowchart editor with linked objects, based on CDiagramEditor.
 
#if !defined(AFX_DIAGRAMEDITOR_H__B8C35A07_CDC4_4D85_9FAE_2C9BE81EA911__INCLUDED_)
#define AFX_DIAGRAMEDITOR_H__B8C35A07_CDC4_4D85_9FAE_2C9BE81EA911__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000
// DiagramEditor.h : header file
//
#include "DiagramEntity.h"
#include "DiagramEntityContainer.h"
#include "DiagramMenu.h"

// Current mouse mode
#define MODE_NONE			0
#define MODE_RUBBERBANDING	1
#define MODE_MOVING			2
#define MODE_RESIZING		3
#define MODE_DRAWING		4
#define MODE_BGRESIZING		5

// Restraint modes
#define RESTRAINT_NONE		0
#define RESTRAINT_VIRTUAL	1
#define RESTRAINT_MARGIN	2

#define KEY_NONE			  0
#define KEY_ARROW			  1 // Arrow keys
#define KEY_PGUPDOWN		  4	// Pg up & pg down
#define KEY_DELETE			  8	// Delete key
#define KEY_ESCAPE			 16	// Escape key
#define KEY_INSERT			 32	// Insert key
#define KEY_PLUSMINUS		 64	// Plus- and minus key
#define KEY_CTRL			128	// Ctrl+A,Z,X,C,V, Enter

#define KEY_ALL				0xFFFFFFFF

#ifndef ID_EDIT_GROUP
	#define ID_EDIT_GROUP		ID_EDIT_REDO + 1
	#define ID_EDIT_UNGROUP		ID_EDIT_GROUP + 1
#endif

#define WHEEL_SCROLL	0
#define WHEEL_ZOOM		1

/////////////////////////////////////////////////////////////////////////////
// CDiagramEditor window

class CDiagramEditor : public CWnd
{
	friend class CDiagramMenu;

public:
	// Construction/destruction/initialization
	CDiagramEditor();
	virtual ~CDiagramEditor();

	virtual BOOL Create( DWORD dwStyle, const RECT& rect, CWnd* pParentWnd, CDiagramEntityContainer* data = NULL );

	virtual void Clear();

	void SetDiagramEntityContainer( CDiagramEntityContainer* objs );
	CDiagramEntityContainer* GetDiagramEntityContainer() const;

	// Visuals
	virtual void	Draw( CDC* dc, CRect rect ) const;
	virtual void	Print( CDC* dc, CRect rect, double zoom );

protected:
	virtual void EraseBackground( CDC* dc, CRect rect ) const;
	virtual void DrawBackground( CDC* dc, CRect rect, double zoom ) const;
	virtual void DrawGrid( CDC* dc, CRect rect, double zoom ) const;
	virtual void DrawMargins( CDC* dc, CRect rect, double zoom ) const;
	virtual void DrawObjects( CDC* dc, double zoom ) const;
	virtual void DrawSelectionMarkers( CDC* dc ) const;

public:
	// Property Accessors
	void		SetVirtualSize( const CSize& size );
	CSize		GetVirtualSize() const;

	void		SetBackgroundColor( COLORREF col );
	COLORREF	GetBackgroundColor() const;
	void		SetNonClientColor( COLORREF col );

	void		ShowGrid( BOOL grid );
	BOOL		IsGridVisible() const;

	void		SetGridColor( COLORREF col );
	COLORREF	GetGridColor() const;

	void		SetGridPenStyle(int style );
	int			GetGridPenStyle() const;

	void		SetGridSize( CSize size );
	CSize		GetGridSize() const;

	void		SetSnapToGrid( BOOL snap );
	BOOL		GetSnapToGrid() const;

	void		SetResize( BOOL bgresize );
	BOOL		GetResize() const;
	void		SetResizeZone( BOOL bgresize );
	int			GetResizeZone() const;

	void		SetMargins( int left, int top, int right, int bottom );
	void		GetMargins( int& left, int& top, int& right, int& bottom ) const;
	void		SetMarginColor( COLORREF marginColor );
	COLORREF	GetMarginColor() const;
	void		ShowMargin( BOOL show );
	BOOL		IsMarginVisible() const;

	int			GetRestraints() const;
	void		SetRestraints( int restraint );

	BOOL		GetMultidraw() const;
	void		SetMultidraw( BOOL multidraw );

	virtual void	SetZoom( double zoom );
	double			GetZoom() const;
	void			SetZoomFactor( double zoomfactor );
	double			GetZoomFactor() const;
	void			SetZoomMax( double zoommax );
	double			GetZoomMax() const;
	void			SetZoomMin( double zoommin );
	double			GetZoomMin() const;

	void		ZoomToFitScreen();
	BOOL		ZoomToFit( CPoint start, CSize size );
	BOOL		ZoomToFit( CSize size );
	void		ScrollIntoView();
	void		ScrollIntoView( CDiagramEntity* obj );

	CSize		GetMarkerSize() const;
	void		SetMarkerSize( CSize markerSize );

	UINT		GetKeyboardInterface() const;
	void		SetKeyboardInterface( int keyInterface );

	void		SetPopupMenu( CDiagramMenu* popupmenu );
	CDiagramMenu* GetPopupMenu() const;

	BOOL		IsModified() const;
	void		SetModified( BOOL dirty );

	// Data access
	virtual void	AddObject( CDiagramEntity* obj );
	virtual void	MoveObject( CDiagramEntity* obj, const CRect& rect );

	int				GetObjectCount() const;
	int				GetSelectCount() const;
	CDiagramEntity* GetObject( int index ) const;
	BOOL			IsDrawing() const;
	CDiagramEntity* GetSelectedObject() const;
	BOOL			IsAnyObjectSelected() const;

	virtual void	StartDrawingObject( CDiagramEntity* obj );

	// Group object operations
	virtual void	New();
	virtual void	SelectAll();
	virtual void	UnselectAll();
	void			DeleteAll();
	virtual void	DeleteAllSelected();

	virtual void	LeftAlignSelected();
	virtual void	RightAlignSelected();
	virtual void	TopAlignSelected();
	virtual void	BottomAlignSelected();
	virtual void	MakeSameSizeSelected();

	// Copy/paste
	virtual void		Cut();
	virtual void		Copy();
	virtual void		Paste();
	virtual void		Undo();

	// Group 
	void		Group();
	void		Ungroup();

	// Panning
	BOOL			GetPanning() const;
	CPoint			GetPanningOrigin() const;
	void			SetPanning( BOOL panning );
	void			SetPanningOrigin( CPoint point );
	virtual void	DrawPanning( CDC* dc ) const;

	// Scroll-wheel
	void			SetScrollWheelMode( int mode );
	int				GetScrollWheelMode() const;

	// Single object operations
	void		Duplicate();
	void		Up();
	void		Down();
	void		Front();
	void		Bottom();

	// Background resizing
	virtual int		GetHitCode( CPoint point );
	virtual CRect	GetSelectionMarkerRect( UINT marker ) const;
	virtual HCURSOR GetCursor( int hit ) const;

	// Command enablers for Doc/View apps
	void		UpdateCut( CCmdUI* pCmdUI ) const;
	void		UpdateCopy( CCmdUI* pCmdUI ) const;
	void		UpdatePaste( CCmdUI* pCmdUI ) const;
	void		UpdateUndo( CCmdUI* pCmdUI ) const;
	void		UpdateGroup( CCmdUI* pCmdUI ) const;
	void		UpdateUngroup( CCmdUI* pCmdUI ) const;

	// Property handling
	void		ShowProperties();

	// Saving and loading
	virtual void Save( CStringArray& stra );
	virtual BOOL FromString( const CString& str );

protected:
	virtual void	SaveObjects( CStringArray& stra );

	virtual void	SetInteractMode( int interactMode, int subMode = 0 );
	virtual int		GetInteractMode() const;
	virtual			CDiagramEntity* GetDrawingObject();

// Overrides
	// ClassWizard generated virtual function overrides
	//{{AFX_VIRTUAL(CDiagramEditor)
	//}}AFX_VIRTUAL

	// Generated message map functions
protected:
	//{{AFX_MSG(CDiagramEditor)
	afx_msg void OnPaint();
	afx_msg BOOL OnEraseBkgnd(CDC* pDC);
	virtual afx_msg void OnSize(UINT nType, int cx, int cy);
	virtual afx_msg void OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar);
	virtual afx_msg void OnVScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar);
	virtual afx_msg BOOL OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message);
	virtual afx_msg void OnLButtonDblClk(UINT nFlags, CPoint point);
	virtual afx_msg void OnLButtonDown(UINT nFlags, CPoint point);
	virtual afx_msg void OnLButtonUp(UINT nFlags, CPoint point);
	virtual afx_msg void OnRButtonUp(UINT nFlags, CPoint point);
	virtual afx_msg void OnRButtonDown(UINT nFlags, CPoint point);
	virtual afx_msg void OnMouseMove(UINT nFlags, CPoint point);
	afx_msg UINT OnGetDlgCode();
	virtual afx_msg void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);
	//}}AFX_MSG

	virtual afx_msg void OnObjectCommand( UINT nID );
	virtual afx_msg BOOL OnMouseWheel( UINT nFlags, short zDelta, CPoint pt );
	virtual afx_msg void OnMButtonDown( UINT nFlags, CPoint point );
	afx_msg void OnKillFocus( CWnd* pNewWnd );
	afx_msg void OnTimer( UINT nIDEvent );

	afx_msg void OnEditCut();
	afx_msg void OnEditCopy();
	afx_msg void OnEditPaste();
	afx_msg void OnEditGroup();
	afx_msg void OnEditUngroup();

	DECLARE_MESSAGE_MAP()

	void SetInternalDiagramEntityContainer( CDiagramEntityContainer* objs );
	virtual HCURSOR GetCursor();

	virtual void SetHScroll( int pos );
	virtual void SetVScroll( int pos );

private:

	// Run-time states/data
	double		m_zoom;				// Current zoom level
	double		m_zoomFactor;		// Zoom factor for +/- keys
	double		m_zoomMax;			// Max zoom level
	double		m_zoomMin;			// Min zoom level
	BOOL		m_dirty;			// TRUE if data is modified

	int			m_interactMode;		// Current mouse-mode
	int			m_subMode;			// Sub-mode for resizing (corner)
	CRect		m_selectionRect;	// Rect to draw for rubberbanding
	CPoint		m_deltaPoint;		// Offset to object when moving
	BOOL		m_drawing;			// We are currently drawing
	BOOL		m_multiDraw;		// If the drawing mode is continued 
									// after an object is added.

	CDiagramEntity* m_multiSelObj;	// Primary object when moving multiple

	// Properties
	COLORREF	m_bkgndCol;			// Background of paper area
	COLORREF	m_nonClientBkgndCol;// Background of non-paper area

	int			m_bgResizeZone;		// Size, in pixels, of resize zone
	BOOL		m_bgResize;			// TRUE if the paper can be resized
	BOOL		m_bgResizeSelected;	// TRUE if we are resizing the background

	BOOL		m_snap;				// TRUE if we should snap to grid
	BOOL		m_grid;				// TRUE if the background grid should be displayed
	int			m_gridStyle;		// Background style
	CSize		m_gridSize;			// Size of a grid cell
	COLORREF	m_gridCol;			// Color of the grid

	BOOL		m_margin;			// TRUE if margins should be drawn
	COLORREF	m_marginColor;		// Color of the margin
	int			m_leftMargin;		// Left margin in pixels
	int			m_topMargin;		// Top margin in pixels
	int			m_rightMargin;		// Right margin in pixels
	int			m_bottomMargin;		// Bottom margin in pixels

	int			m_restraint;		// Restraint mode ( none, virtual or margin )

	CSize		m_markerSize;		// Size of selection marker

	UINT		m_keyInterface;		// Flags for the keys the editor will handle

	CPoint		m_panOrigin;
	BOOL		m_panning;
	UINT		m_panningTimer;

	// Data pointer
	CDiagramEntityContainer*	m_objs;	// Pointer to data

	CDiagramMenu*				m_popupMenu;

	// Misc data
	CDiagramEntity* m_drawObj;	// Temporary pointer to object that should be drawn
	CDiagramEntityContainer* m_internalData;	// Internal data pointer - if external data is not submitted

public:
	// Coordinate conversions
	void		ScreenToVirtual( CRect& rect ) const;
	void		ScreenToVirtual( CPoint& point ) const;
	void		ScreenToVirtual( CSize& size ) const;
	void		VirtualToScreen( CRect& rect ) const;
	void		VirtualToScreen( CPoint& point ) const;

protected:
	// Scroll
	void		SetupScrollbars();
	int			HScroll( int scroll );
	int			VScroll( int scroll );
	CPoint		ScrollPoint( CPoint point );

	// Coordinate modifications
	int			SnapX( int coord ) const;
	int			SnapY( int coord ) const;
	CSize		GetContainingSize() const;
	void		InsideRestraints( double& x, double& y );
	void		AdjustForRestraints( double& left, double& top, double& right, double& bottom );
	void		AdjustForRestraints( double& xpos, double& ypos );
	BOOL		OutsideRestraints( CPoint point );

private:
	// Misc internal functions
	void		SetInternalVirtualSize( const CSize& size );
	void		RemoveUnselectedPropertyDialogs();
	void		ShowPopup( CPoint point );

	// Panning cursors
	HCURSOR		m_cursorNorth;
	HCURSOR		m_cursorNorthEast;
	HCURSOR		m_cursorEast;
	HCURSOR		m_cursorSouthEast;
	HCURSOR		m_cursorSouth;
	HCURSOR		m_cursorSouthWest;
	HCURSOR		m_cursorWest;
	HCURSOR		m_cursorNorthWest;

	int			m_scrollwheel;		// Scroll wheel mode, scoll or zoom

};

/////////////////////////////////////////////////////////////////////////////

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_DIAGRAMEDITOR_H__B8C35A07_CDC4_4D85_9FAE_2C9BE81EA911__INCLUDED_)

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Written By
Johan Rosengren
Software Developer (Senior) Abstrakt Mekanik AB
Sweden Sweden
45 years old, married, three kids.

Started with computers more than 20 years ago on a CBM-64.

Read Theoretical Philosophy at the University of Lund.

Working as a C++ consultant developer.

Science-fiction freak. Enjoy vintage punkrock.

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Posted 3 May 2004

Article Copyright 2004 by Johan Rosengren
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