utils/ogl/samples/ogledit/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 _OGLSAMPLE_DOC_H_
  13 #define _OGLSAMPLE_DOC_H_
  14
  15 #ifdef __GNUG__
  16 // #pragma interface
  17 #endif
  18
  19 #include <wx/docview.h>
  20 #include <wx/string.h>
  21 #include <wx/wxexpr.h>
  22
  23 #include "ogl.h"
  24
  25 /*
  26  * Override a few members for this application
  27  */
  28
  29 class MyDiagram: public wxDiagram
  30 {
  31  public:
  32   MyDiagram(void) {}
  33   bool OnShapeSave(wxExprDatabase& db, wxShape& shape, wxExpr& expr);
  34   bool OnShapeLoad(wxExprDatabase& db, wxShape& shape, wxExpr& expr);
  35 };
  36
  37 /*
  38  * A few new shape classes so we have a 1:1 mapping
  39  * between palette symbol and unique class
  40  */
  41
  42 class wxRoundedRectangleShape: public wxRectangleShape
  43 {
  44   DECLARE_DYNAMIC_CLASS(wxRoundedRectangleShape)
  45  private:
  46  public:
  47   wxRoundedRectangleShape(double w = 0.0, double h = 0.0);
  48 };
  49
  50 class wxDiamondShape: public wxPolygonShape
  51 {
  52   DECLARE_DYNAMIC_CLASS(wxDiamondShape)
  53  private:
  54  public:
  55   wxDiamondShape(double w = 0.0, double h = 0.0);
  56 };
  57
  58 /*
  59  * All shape event behaviour is routed through this handler, so we don't
  60  * have to derive from each shape class. We plug this in to each shape.
  61  */
  62
  63 class MyEvtHandler: public wxShapeEvtHandler
  64 {
  65  public:
  66   wxString label;
  67   MyEvtHandler(wxShapeEvtHandler *prev = NULL, wxShape *shape = NULL, const wxString& lab = ""):wxShapeEvtHandler(prev, shape)
  68   {
  69     label = lab;
  70   }
  71   ~MyEvtHandler(void)
  72   {
  73   }
  74   void OnLeftClick(double x, double y, int keys = 0, int attachment = 0);
  75   void OnBeginDragRight(double x, double y, int keys = 0, int attachment = 0);
  76   void OnDragRight(bool draw, double x, double y, int keys = 0, int attachment = 0);
  77   void OnEndDragRight(double x, double y, int keys = 0, int attachment = 0);
  78   void OnEndSize(double x, double y);
  79 };
  80
  81 /*
  82  * A diagram document, which contains a diagram.
  83  */
  84
  85 class DiagramDocument: public wxDocument
  86 {
  87   DECLARE_DYNAMIC_CLASS(DiagramDocument)
  88  private:
  89  public:
  90   MyDiagram diagram;
  91
  92   DiagramDocument(void);
  93   ~DiagramDocument(void);
  94
  95   ostream& SaveObject(ostream& stream);
  96   istream& LoadObject(istream& stream);
  97
  98   inline wxDiagram *GetDiagram() { return &diagram; }
  99
 100   bool OnCloseDocument(void);
 101 };
 102
 103 /*
 104  * Most user interface commands are routed through this, to give us the
 105  * Undo/Redo mechanism. If you add more commands, such as changing the shape colour,
 106  * you will need to add members to 'remember' what the user applied (for 'Do') and what the
 107  * previous state was (for 'Undo').
 108  * You can have one member for each property to be changed. Assume we also have
 109  * a pointer member wxShape *shape, which is set to the shape being changed.
 110  * Let's assume we're changing the shape colour. Our member for this is shapeColour.
 111  *
 112  * - In 'Do':
 113  *   o Set a temporary variable 'temp' to the current colour for 'shape'.
 114  *   o Change the colour to the new colour.
 115  *   o Set shapeColour to the _old_ colour, 'temp'.
 116  * - In 'Undo':
 117  *   o Set a temporary variable 'temp' to the current colour for 'shape'.
 118  *   o Change the colour to shapeColour (the old colour).
 119  *   o Set shapeColour to 'temp'.
 120  *
 121  * So, as long as we have a pointer to the shape being changed,
 122  * we only need one member variable for each property.
 123  *
 124  * PROBLEM: when an Add shape command is redone, the 'shape' pointer changes.
 125  * Assume, as here, that we keep a pointer to the old shape so we reuse it
 126  * when we recreate.
 127  */
 128
 129 class DiagramCommand: public wxCommand
 130 {
 131  protected:
 132   DiagramDocument *doc;
 133   int cmd;
 134   wxShape *shape; // Pointer to the shape we're acting on
 135   wxShape *fromShape;
 136   wxShape *toShape;
 137   wxClassInfo *shapeInfo;
 138   double x;
 139   double y;
 140   bool selected;
 141   bool deleteShape;
 142
 143   // Storage for property commands
 144   wxBrush *shapeBrush;
 145   wxPen *shapePen;
 146   wxString shapeLabel;
 147  public:
 148   // Multi-purpose constructor for creating, deleting shapes
 149   DiagramCommand(char *name, int cmd, DiagramDocument *ddoc, wxClassInfo *shapeInfo = NULL,
 150      double x = 0.0, double y = 0.0, bool sel = FALSE, wxShape *theShape = NULL, wxShape *fs = NULL, wxShape *ts = NULL);
 151
 152   // Property-changing command constructors
 153   DiagramCommand(char *name, int cmd, DiagramDocument *ddoc, wxBrush *backgroundColour, wxShape *theShape);
 154   DiagramCommand(char *name, int cmd, DiagramDocument *ddoc, const wxString& lab, wxShape *theShape);
 155
 156   ~DiagramCommand(void);
 157
 158   bool Do(void);
 159   bool Undo(void);
 160
 161   inline void SetShape(wxShape *s) { shape = s; }
 162   inline wxShape *GetShape(void) { return shape; }
 163   inline wxShape *GetFromShape(void) { return fromShape; }
 164   inline wxShape *GetToShape(void) { return toShape; }
 165   inline wxClassInfo *GetShapeInfo(void) { return shapeInfo; }
 166   inline bool GetSelected(void) { return selected; }
 167
 168   void RemoveLines(wxShape *shape);
 169 };
 170
 171 #endif
 172   // _OGLSAMPLE_DOC_H_