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doc.h
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C/C++ Source or Header
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2002-09-07
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4KB
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136 lines
/////////////////////////////////////////////////////////////////////////////
// Name: doc.h
// Purpose: Document classes
// Author: Julian Smart
// Modified by:
// Created: 12/07/98
// RCS-ID: $Id: doc.h,v 1.3 2002/09/07 12:12:22 GD Exp $
// Copyright: (c) Julian Smart
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _STUDIO_DOC_H_
#define _STUDIO_DOC_H_
#if defined(__GNUG__) && !defined(__APPLE__)
// #pragma interface
#endif
#include <wx/docview.h>
#include <wx/cmdproc.h>
#include <wx/string.h>
#include <wx/wxexpr.h>
#include <wx/ogl/ogl.h>
#include "shapes.h"
/*
* A diagram document, which contains a diagram.
*/
class csDiagramDocument: public wxDocument
{
DECLARE_DYNAMIC_CLASS(csDiagramDocument)
public:
csDiagramDocument();
~csDiagramDocument();
bool OnSaveDocument(const wxString& file);
bool OnOpenDocument(const wxString& file);
inline wxDiagram *GetDiagram() { return &m_diagram; }
bool OnCloseDocument();
protected:
csDiagram m_diagram;
};
/*
Do/Undo 30/7/98
1) We have a csCommandState, and in csDiagramCommand you have a list of
these. This allows undo to work with several shapes at once.
2) Instead of storing info about each operation, e.g. separate pens, colours,
etc., we simply use a copy of the shape.
In csCommandState, we have a pointer to the actual shape in the canvas, m_currentShape.
We also have wxShape* m_shapeState which stores the requested or previous state
(depending on whether it's before the Do or after the Do.
- In Do: save a temp copy of the old m_currentShape (i.e. the state just before it's changed).
Change the data pointed to by m_currentShape to the new attributes stored in m_shapeState.
Now assign the temp copy to m_shapeState, for use in Undo.
wxShape* temp = m_currentShape->Copy(); // Take a copy of the current state
m_currentShape->Set(m_shapeState); // Apply the new state (e.g. moving, changing colour etc.)
delete m_shapeState; // Delete the previous 'old state'.
m_shapeState = temp; // Remember the new 'old state'.
*/
class csCommandState;
class csDiagramCommand: public wxCommand
{
friend class csCommandState;
public:
// Multi-purpose constructor for creating, deleting shapes
csDiagramCommand(const wxString& name, csDiagramDocument *doc,
csCommandState* onlyState = NULL); // Allow for the common case of just one state to change
~csDiagramCommand();
bool Do();
bool Undo();
// Add a state to the end of the list
void AddState(csCommandState* state);
// Insert a state at the beginning of the list
void InsertState(csCommandState* state);
// Schedule all lines connected to the states to be cut.
void RemoveLines();
// Find the state that refers to this shape
csCommandState* FindStateByShape(wxShape* shape);
wxList& GetStates() const { return (wxList&) m_states; }
protected:
csDiagramDocument* m_doc;
wxList m_states;
};
class csCommandState: public wxObject
{
friend class csDiagramCommand;
public:
csCommandState(int cmd, wxShape* savedState, wxShape* shapeOnCanvas);
~csCommandState();
bool Do();
bool Undo();
inline void SetSavedState(wxShape *s) { m_savedState = s; }
inline wxShape *GetSavedState() const { return m_savedState; }
inline void SetShapeOnCanvas(wxShape *s) { m_shapeOnCanvas = s; }
inline wxShape *GetShapeOnCanvas() const { return m_shapeOnCanvas; }
protected:
wxShape* m_savedState; // Previous state, for restoring on Undo
wxShape* m_shapeOnCanvas; // The actual shape on the canvas
csDiagramDocument* m_doc;
int m_cmd;
// These store the line ordering for the shapes at either end,
// so an un-cut line can restore the ordering properly. Otherwise
// it just adds the line at an arbitrary position.
int m_linePositionFrom;
int m_linePositionTo;
};
#endif
// _STUDIO_DOC_H_