samples/dataview/mymodels.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        mymodels.h
   3 // Purpose:     wxDataViewCtrl wxWidgets sample
   4 // Author:      Robert Roebling
   5 // Modified by: Francesco Montorsi, Bo Yang
   6 // Created:     06/01/06
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Robert Roebling
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12
  13 // ----------------------------------------------------------------------------
  14 // MyMusicTreeModelNode: a node inside MyMusicTreeModel
  15 // ----------------------------------------------------------------------------
  16
  17 class MyMusicTreeModelNode;
  18 WX_DEFINE_ARRAY_PTR( MyMusicTreeModelNode*, MyMusicTreeModelNodePtrArray );
  19
  20 class MyMusicTreeModelNode
  21 {
  22 public:
  23     MyMusicTreeModelNode( MyMusicTreeModelNode* parent,
  24                           const wxString &title, const wxString &artist,
  25                           unsigned int year )
  26     {
  27         m_parent = parent;
  28
  29         m_title = title;
  30         m_artist = artist;
  31         m_year = year;
  32         m_quality = "good";
  33
  34         m_container = false;
  35     }
  36
  37     MyMusicTreeModelNode( MyMusicTreeModelNode* parent,
  38                           const wxString &branch )
  39     {
  40         m_parent = parent;
  41
  42         m_title = branch;
  43         m_year = -1;
  44
  45         m_container = true;
  46     }
  47
  48     ~MyMusicTreeModelNode()
  49     {
  50         // free all our children nodes
  51         size_t count = m_children.GetCount();
  52         for (size_t i = 0; i < count; i++)
  53         {
  54             MyMusicTreeModelNode *child = m_children[i];
  55             delete child;
  56         }
  57     }
  58
  59     bool IsContainer() const
  60         { return m_container; }
  61
  62     MyMusicTreeModelNode* GetParent()
  63         { return m_parent; }
  64     MyMusicTreeModelNodePtrArray& GetChildren()
  65         { return m_children; }
  66     MyMusicTreeModelNode* GetNthChild( unsigned int n )
  67         { return m_children.Item( n ); }
  68     void Insert( MyMusicTreeModelNode* child, unsigned int n)
  69         { m_children.Insert( child, n); }
  70     void Append( MyMusicTreeModelNode* child )
  71         { m_children.Add( child ); }
  72     unsigned int GetChildCount() const
  73         { return m_children.GetCount(); }
  74
  75 public:     // public to avoid getters/setters
  76     wxString                m_title;
  77     wxString                m_artist;
  78     int                     m_year;
  79     wxString                m_quality;
  80
  81     // TODO/FIXME:
  82     // the GTK version of wxDVC (in particular wxDataViewCtrlInternal::ItemAdded)
  83     // needs to know in advance if a node is or _will be_ a container.
  84     // Thus implementing:
  85     //   bool IsContainer() const
  86     //    { return m_children.GetCount()>0; }
  87     // doesn't work with wxGTK when MyMusicTreeModel::AddToClassical is called
  88     // AND the classical node was removed (a new node temporary without children
  89     // would be added to the control)
  90     bool m_container;
  91
  92 private:
  93     MyMusicTreeModelNode          *m_parent;
  94     MyMusicTreeModelNodePtrArray   m_children;
  95 };
  96
  97
  98 // ----------------------------------------------------------------------------
  99 // MyMusicTreeModel
 100 // ----------------------------------------------------------------------------
 101
 102 /*
 103 Implement this data model
 104             Title               Artist               Year        Judgement
 105 --------------------------------------------------------------------------
 106 1: My Music:
 107     2:  Pop music
 108         3:  You are not alone   Michael Jackson      1995        good
 109         4:  Take a bow          Madonna              1994        good
 110     5:  Classical music
 111         6:  Ninth Symphony      Ludwig v. Beethoven  1824        good
 112         7:  German Requiem      Johannes Brahms      1868        good
 113 */
 114
 115 class MyMusicTreeModel: public wxDataViewModel
 116 {
 117 public:
 118     MyMusicTreeModel();
 119     ~MyMusicTreeModel()
 120     {
 121         delete m_root;
 122     }
 123
 124     // helper method for wxLog
 125
 126     wxString GetTitle( const wxDataViewItem &item ) const;
 127     wxString GetArtist( const wxDataViewItem &item ) const;
 128     int GetYear( const wxDataViewItem &item ) const;
 129
 130     // helper methods to change the model
 131
 132     void AddToClassical( const wxString &title, const wxString &artist,
 133                          unsigned int year );
 134     void Delete( const wxDataViewItem &item );
 135
 136     wxDataViewItem GetNinthItem() const
 137     {
 138        return wxDataViewItem( m_ninth );
 139     }
 140
 141     // override sorting to always sort branches ascendingly
 142
 143     int Compare( const wxDataViewItem &item1, const wxDataViewItem &item2,
 144                  unsigned int column, bool ascending ) const;
 145
 146     // implementation of base class virtuals to define model
 147
 148     virtual unsigned int GetColumnCount() const
 149     {
 150         return 6;
 151     }
 152
 153     virtual wxString GetColumnType( unsigned int col ) const
 154     {
 155         if (col == 2)
 156             return wxT("long");
 157
 158         return wxT("string");
 159     }
 160
 161     virtual void GetValue( wxVariant &variant,
 162                            const wxDataViewItem &item, unsigned int col ) const;
 163     virtual bool SetValue( const wxVariant &variant,
 164                            const wxDataViewItem &item, unsigned int col );
 165
 166     virtual wxDataViewItem GetParent( const wxDataViewItem &item ) const;
 167     virtual bool IsContainer( const wxDataViewItem &item ) const;
 168     virtual unsigned int GetChildren( const wxDataViewItem &parent,
 169                                       wxDataViewItemArray &array ) const;
 170
 171 private:
 172     MyMusicTreeModelNode*   m_root;
 173
 174     // pointers to some "special" nodes of the tree:
 175     MyMusicTreeModelNode*   m_pop;
 176     MyMusicTreeModelNode*   m_classical;
 177     MyMusicTreeModelNode*   m_ninth;
 178
 179     // ??
 180     bool                    m_classicalMusicIsKnownToControl;
 181 };
 182
 183
 184 // ----------------------------------------------------------------------------
 185 // MyListModel
 186 // ----------------------------------------------------------------------------
 187
 188 class MyListModel: public wxDataViewVirtualListModel
 189 {
 190 public:
 191     MyListModel();
 192
 193     // helper methods to change the model
 194
 195     void Prepend( const wxString &text );
 196     void DeleteItem( const wxDataViewItem &item );
 197     void DeleteItems( const wxDataViewItemArray &items );
 198     void AddMany();
 199
 200
 201     // implementation of base class virtuals to define model
 202
 203     virtual unsigned int GetColumnCount() const
 204     {
 205         return 3;
 206     }
 207
 208     virtual wxString GetColumnType( unsigned int col ) const
 209     {
 210         if (col == 1)
 211             return wxT("wxDataViewIconText");
 212
 213         return wxT("string");
 214     }
 215
 216     virtual unsigned int GetRowCount()
 217     {
 218         return m_array.GetCount();
 219     }
 220
 221     virtual void GetValueByRow( wxVariant &variant,
 222                                 unsigned int row, unsigned int col ) const;
 223     virtual bool GetAttrByRow( unsigned int row, unsigned int col, wxDataViewItemAttr &attr );
 224     virtual bool SetValueByRow( const wxVariant &variant,
 225                                 unsigned int row, unsigned int col );
 226
 227 private:
 228     wxArrayString    m_array;
 229     wxIcon           m_icon[2];
 230     int              m_virtualItems;
 231 };
 232