contrib/samples/ogl/studio/doc.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        doc.h
   3 // Purpose:     Document classes
   4 // Author:      Julian Smart
   5 // Modified by:
   6 // Created:     12/07/98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _STUDIO_DOC_H_
  13 #define _STUDIO_DOC_H_
  14
  15 #if defined(__GNUG__) && !defined(__APPLE__)
  16 // #pragma interface
  17 #endif
  18
  19 #include <wx/docview.h>
  20 #include <wx/cmdproc.h>
  21 #include <wx/string.h>
  22
  23 #include <wx/deprecated/setup.h>
  24 #include <wx/deprecated/wxexpr.h>
  25
  26 #include <wx/ogl/ogl.h>
  27 #include "shapes.h"
  28
  29 /*
  30  * A diagram document, which contains a diagram.
  31  */
  32
  33 class csDiagramDocument: public wxDocument
  34 {
  35   DECLARE_DYNAMIC_CLASS(csDiagramDocument)
  36 public:
  37   csDiagramDocument();
  38   ~csDiagramDocument();
  39
  40   bool OnSaveDocument(const wxString& file);
  41   bool OnOpenDocument(const wxString& file);
  42
  43   inline wxDiagram *GetDiagram() { return &m_diagram; }
  44
  45   bool OnCloseDocument();
  46
  47 protected:
  48   csDiagram         m_diagram;
  49 };
  50
  51 /*
  52  Do/Undo 30/7/98
  53
  54  1) We have a csCommandState, and in csDiagramCommand you have a list of
  55     these. This allows undo to work with several shapes at once.
  56
  57  2) Instead of storing info about each operation, e.g. separate pens, colours,
  58     etc., we simply use a copy of the shape.
  59     In csCommandState, we have a pointer to the actual shape in the canvas, m_currentShape.
  60     We also have wxShape* m_shapeState which stores the requested or previous state
  61     (depending on whether it's before the Do or after the Do.
  62
  63     - In Do: save a temp copy of the old m_currentShape (i.e. the state just before it's changed).
  64       Change the data pointed to by m_currentShape to the new attributes stored in m_shapeState.
  65       Now assign the temp copy to m_shapeState, for use in Undo.
  66
  67       wxShape* temp = m_currentShape->Copy(); // Take a copy of the current state
  68       m_currentShape->Set(m_shapeState);      // Apply the new state (e.g. moving, changing colour etc.)
  69       delete m_shapeState;                    // Delete the previous 'old state'.
  70       m_shapeState = temp;                    // Remember the new 'old state'.
  71
  72  */
  73
  74
  75 class csCommandState;
  76 class csDiagramCommand: public wxCommand
  77 {
  78     friend class csCommandState;
  79  public:
  80   // Multi-purpose constructor for creating, deleting shapes
  81   csDiagramCommand(const wxString& name, csDiagramDocument *doc,
  82     csCommandState* onlyState = NULL); // Allow for the common case of just one state to change
  83
  84   ~csDiagramCommand();
  85
  86   bool Do();
  87   bool Undo();
  88
  89   // Add a state to the end of the list
  90   void AddState(csCommandState* state);
  91
  92   // Insert a state at the beginning of the list
  93   void InsertState(csCommandState* state);
  94
  95   // Schedule all lines connected to the states to be cut.
  96   void RemoveLines();
  97
  98   // Find the state that refers to this shape
  99   csCommandState* FindStateByShape(wxShape* shape);
 100
 101   wxList& GetStates() const { return (wxList&) m_states; }
 102
 103  protected:
 104   csDiagramDocument*    m_doc;
 105   wxList                m_states;
 106 };
 107
 108 class csCommandState: public wxObject
 109 {
 110     friend class csDiagramCommand;
 111 public:
 112     csCommandState(int cmd, wxShape* savedState, wxShape* shapeOnCanvas);
 113     ~csCommandState();
 114
 115     bool Do();
 116     bool Undo();
 117
 118     inline void SetSavedState(wxShape *s) { m_savedState = s; }
 119     inline wxShape *GetSavedState() const { return m_savedState; }
 120
 121     inline void SetShapeOnCanvas(wxShape *s) { m_shapeOnCanvas = s; }
 122     inline wxShape *GetShapeOnCanvas() const { return m_shapeOnCanvas; }
 123 protected:
 124     wxShape*                m_savedState;       // Previous state, for restoring on Undo
 125     wxShape*                m_shapeOnCanvas;    // The actual shape on the canvas
 126     csDiagramDocument*      m_doc;
 127     int                     m_cmd;
 128
 129     // These store the line ordering for the shapes at either end,
 130     // so an un-cut line can restore the ordering properly. Otherwise
 131     // it just adds the line at an arbitrary position.
 132     int                     m_linePositionFrom;
 133     int                     m_linePositionTo;
 134 };
 135
 136 #endif
 137   // _STUDIO_DOC_H_