1///////////////////////////////////////////////////////////////////////////// 2// Name: contrib/samples/ogl/studio/doc.h 3// Purpose: Document classes 4// Author: Julian Smart 5// Modified by: 6// Created: 12/07/98 7// RCS-ID: $Id: doc.h 37440 2006-02-10 11:59:52Z ABX $ 8// Copyright: (c) Julian Smart 9// Licence: wxWindows licence 10///////////////////////////////////////////////////////////////////////////// 11 12#ifndef _STUDIO_DOC_H_ 13#define _STUDIO_DOC_H_ 14 15#include "wx/docview.h" 16#include "wx/cmdproc.h" 17#include "wx/string.h" 18 19#include "wx/ogl/ogl.h" // base header of OGL, includes and adjusts wx/deprecated/setup.h 20 21#include "shapes.h" 22 23/* 24 * A diagram document, which contains a diagram. 25 */ 26 27class csDiagramDocument: public wxDocument 28{ 29 DECLARE_DYNAMIC_CLASS(csDiagramDocument) 30public: 31 csDiagramDocument(); 32 ~csDiagramDocument(); 33 34#if wxUSE_PROLOGIO 35 bool OnSaveDocument(const wxString& file); 36 bool OnOpenDocument(const wxString& file); 37#endif // wxUSE_PROLOGIO 38 39 inline wxDiagram *GetDiagram() { return &m_diagram; } 40 41 bool OnCloseDocument(); 42 43protected: 44 csDiagram m_diagram; 45}; 46 47/* 48 Do/Undo 30/7/98 49 50 1) We have a csCommandState, and in csDiagramCommand you have a list of 51 these. This allows undo to work with several shapes at once. 52 53 2) Instead of storing info about each operation, e.g. separate pens, colours, 54 etc., we simply use a copy of the shape. 55 In csCommandState, we have a pointer to the actual shape in the canvas, m_currentShape. 56 We also have wxShape* m_shapeState which stores the requested or previous state 57 (depending on whether it's before the Do or after the Do. 58 59 - In Do: save a temp copy of the old m_currentShape (i.e. the state just before it's changed). 60 Change the data pointed to by m_currentShape to the new attributes stored in m_shapeState. 61 Now assign the temp copy to m_shapeState, for use in Undo. 62 63 wxShape* temp = m_currentShape->Copy(); // Take a copy of the current state 64 m_currentShape->Set(m_shapeState); // Apply the new state (e.g. moving, changing colour etc.) 65 delete m_shapeState; // Delete the previous 'old state'. 66 m_shapeState = temp; // Remember the new 'old state'. 67 68 */ 69 70 71class csCommandState; 72class csDiagramCommand: public wxCommand 73{ 74 friend class csCommandState; 75 public: 76 // Multi-purpose constructor for creating, deleting shapes 77 csDiagramCommand(const wxString& name, csDiagramDocument *doc, 78 csCommandState* onlyState = NULL); // Allow for the common case of just one state to change 79 80 ~csDiagramCommand(); 81 82 bool Do(); 83 bool Undo(); 84 85 // Add a state to the end of the list 86 void AddState(csCommandState* state); 87 88 // Insert a state at the beginning of the list 89 void InsertState(csCommandState* state); 90 91 // Schedule all lines connected to the states to be cut. 92 void RemoveLines(); 93 94 // Find the state that refers to this shape 95 csCommandState* FindStateByShape(wxShape* shape); 96 97 wxList& GetStates() const { return (wxList&) m_states; } 98 99 protected: 100 csDiagramDocument* m_doc; 101 wxList m_states; 102}; 103 104class csCommandState: public wxObject 105{ 106 friend class csDiagramCommand; 107public: 108 csCommandState(int cmd, wxShape* savedState, wxShape* shapeOnCanvas); 109 ~csCommandState(); 110 111 bool Do(); 112 bool Undo(); 113 114 inline void SetSavedState(wxShape *s) { m_savedState = s; } 115 inline wxShape *GetSavedState() const { return m_savedState; } 116 117 inline void SetShapeOnCanvas(wxShape *s) { m_shapeOnCanvas = s; } 118 inline wxShape *GetShapeOnCanvas() const { return m_shapeOnCanvas; } 119protected: 120 wxShape* m_savedState; // Previous state, for restoring on Undo 121 wxShape* m_shapeOnCanvas; // The actual shape on the canvas 122 csDiagramDocument* m_doc; 123 int m_cmd; 124 125 // These store the line ordering for the shapes at either end, 126 // so an un-cut line can restore the ordering properly. Otherwise 127 // it just adds the line at an arbitrary position. 128 int m_linePositionFrom; 129 int m_linePositionTo; 130}; 131 132#endif 133 // _STUDIO_DOC_H_ 134