samples/dataview/dataview.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        dataview.cpp
   3 // Purpose:     wxDataViewCtrl wxWidgets sample
   4 // Author:      Robert Roebling
   5 // Modified by: Francesco Montorsi
   6 // Created:     06/01/06
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Robert Roebling
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx/wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #ifdef __BORLANDC__
  16 #pragma hdrstop
  17 #endif
  18
  19 #ifndef WX_PRECOMP
  20     #include "wx/wx.h"
  21 #endif
  22
  23 #include "wx/datetime.h"
  24 #include "wx/splitter.h"
  25 #include "wx/aboutdlg.h"
  26 #include "wx/choicdlg.h"
  27 #include "wx/numdlg.h"
  28 #include "wx/dataview.h"
  29 #include "wx/spinctrl.h"
  30
  31 #ifndef __WXMSW__
  32     #include "../sample.xpm"
  33 #endif
  34
  35 #include "null.xpm"
  36
  37
  38 #define DEFAULT_ALIGN                   wxALIGN_LEFT
  39 #define DATAVIEW_DEFAULT_STYLE          (wxDV_MULTIPLE|wxDV_HORIZ_RULES|wxDV_VERT_RULES)
  40
  41
  42
  43 // -------------------------------------
  44 // MyMusicModel
  45 // -------------------------------------
  46
  47 /*
  48 Implement this data model
  49             Title               Artist               Year
  50 -------------------------------------------------------------
  51 1: My Music:
  52     2:  Pop music
  53         3:  You are not alone   Michael Jackson      1995
  54         4:  Take a bow          Madonna              1994
  55     5:  Classical music
  56         6:  Ninth Symphony      Ludwig v. Beethoven  1824
  57         7:  German Requiem      Johannes Brahms      1868
  58 */
  59
  60
  61
  62 class MyMusicModelNode;
  63 WX_DEFINE_ARRAY_PTR( MyMusicModelNode*, MyMusicModelNodes );
  64
  65 class MyMusicModelNode
  66 {
  67 public:
  68     MyMusicModelNode( MyMusicModelNode* parent,
  69                       const wxString &title, const wxString &artist, const wxString &year )
  70     {
  71         m_parent = parent;
  72         m_title = title;
  73         m_artist = artist;
  74         m_year = year;
  75         m_isContainer = false;
  76     }
  77
  78     MyMusicModelNode( MyMusicModelNode* parent,
  79                       const wxString &branch )
  80     {
  81         m_parent = parent;
  82         m_title = branch;
  83         m_isContainer = true;
  84     }
  85
  86     ~MyMusicModelNode()
  87     {
  88         size_t count = m_children.GetCount();
  89         size_t i;
  90         for (i = 0; i < count; i++)
  91         {
  92             MyMusicModelNode *child = m_children[i];
  93             delete child;
  94         }
  95     }
  96
  97     bool IsContainer()                                    { return m_isContainer; }
  98
  99     MyMusicModelNode* GetParent()                         { return m_parent; }
 100     MyMusicModelNodes &GetChildren()                      { return m_children; }
 101     MyMusicModelNode* GetNthChild( unsigned int n )       { return m_children.Item( n ); }
 102     void Insert( MyMusicModelNode* child, unsigned int n) { m_children.Insert( child, n); }
 103     void Append( MyMusicModelNode* child )                { m_children.Add( child ); }
 104     unsigned int GetChildCount()                          { return m_children.GetCount(); }
 105
 106 public:
 107     wxString            m_title;
 108     wxString            m_artist;
 109     wxString            m_year;
 110
 111 private:
 112     MyMusicModelNode   *m_parent;
 113     MyMusicModelNodes   m_children;
 114     bool                m_isContainer;
 115 };
 116
 117
 118 class MyMusicModel: public wxDataViewModel
 119 {
 120 public:
 121
 122     // constructor
 123
 124     MyMusicModel()
 125     {
 126         m_root = new MyMusicModelNode( NULL, "My Music" );
 127         m_pop = new MyMusicModelNode( m_root, "Pop music" );
 128         m_root->Append( m_pop );
 129         m_pop->Append( new MyMusicModelNode( m_pop,
 130             "You are not alone", "Michael Jackson", "1995" ) );
 131         m_pop->Append( new MyMusicModelNode( m_pop,
 132             "Take a bow", "Madonna", "1994" ) );
 133         m_classical = new MyMusicModelNode( m_root, "Classical music" );
 134         m_root->Append( m_classical );
 135         m_classical->Append( new MyMusicModelNode( m_classical,
 136             "Ninth symphony", "Ludwig van Beethoven", "1824" ) );
 137         m_classical->Append( new MyMusicModelNode( m_classical,
 138             "German Requiem", "Johannes Brahms", "1868" ) );
 139         m_classicalMusicIsKnownToControl = false;
 140     }
 141
 142     // helper methods to change the model
 143
 144     void AddToClassical( const wxString &title, const wxString &artist, const wxString &year )
 145     {
 146         // add to data
 147         MyMusicModelNode *child_node =
 148             new MyMusicModelNode( m_classical, title, artist, year );
 149         m_classical->Append( child_node );
 150
 151         if (m_classicalMusicIsKnownToControl)
 152         {
 153             // notify control
 154             wxDataViewItem child( (void*) child_node );
 155             wxDataViewItem parent( (void*) m_classical );
 156             ItemAdded( parent, child );
 157         }
 158     }
 159
 160     void Delete( const wxDataViewItem &item )
 161     {
 162         MyMusicModelNode *node = (MyMusicModelNode*) item.GetID();
 163         node->GetParent()->GetChildren().Remove( node );
 164         delete node;
 165
 166         // notify control
 167         ItemDeleted( item );
 168     }
 169
 170     // override sorting to always sort branches ascendingly
 171
 172     int Compare( const wxDataViewItem &item1, const wxDataViewItem &item2 )
 173     {
 174         if (IsContainer(item1) && IsContainer(item2))
 175         {
 176             wxVariant value1,value2;
 177             GetValue( value1, item1, 0 );
 178             GetValue( value2, item2, 0 );
 179
 180             wxString str1 = value1.GetString();
 181             wxString str2 = value2.GetString();
 182             int res = str1.Cmp( str2 );
 183             if (res) return res;
 184
 185             // items must be different
 186             unsigned long litem1 = (unsigned long) item1.GetID();
 187             unsigned long litem2 = (unsigned long) item2.GetID();
 188
 189             return litem1-litem2;
 190         }
 191
 192         return wxDataViewModel::Compare( item1, item2 );
 193     }
 194
 195     // implementation of base class virtuals to define model
 196
 197     virtual unsigned int GetColumnCount() const
 198     {
 199         return 3;
 200     }
 201
 202     virtual wxString GetColumnType( unsigned int col ) const
 203     {
 204         return "string";
 205     }
 206
 207     virtual void GetValue( wxVariant &variant,
 208                            const wxDataViewItem &item, unsigned int col ) const
 209     {
 210         MyMusicModelNode *node = (MyMusicModelNode*) item.GetID();
 211         switch (col)
 212         {
 213             case 0: variant = node->m_title; break;
 214             case 1: variant = node->m_artist; break;
 215             case 2: variant = node->m_year; break;
 216             default: wxLogError( "MyMusicModel::GetValue: wrong column" );
 217         }
 218     }
 219
 220     virtual bool SetValue( const wxVariant &variant,
 221                            const wxDataViewItem &item, unsigned int col )
 222     {
 223         MyMusicModelNode *node = (MyMusicModelNode*) item.GetID();
 224         switch (col)
 225         {
 226             case 0: node->m_title = variant.GetString(); break;
 227             case 1: node->m_artist  = variant.GetString(); break;
 228             case 2: node->m_year  = variant.GetString(); break;
 229             default: wxLogError( "MyMusicModel::SetValue: wrong column" );
 230         }
 231     }
 232
 233     virtual wxDataViewItem GetParent( const wxDataViewItem &item ) const
 234     {
 235         // the invisble root node has no parent
 236         if (!item.IsOk())
 237             return wxDataViewItem(0);
 238
 239         MyMusicModelNode *node = (MyMusicModelNode*) item.GetID();
 240
 241         // "MyMusic" also has no parent
 242         if (node == m_root)
 243             return wxDataViewItem(0);
 244
 245         return wxDataViewItem( (void*) node->GetParent() );
 246     }
 247
 248     virtual bool IsContainer( const wxDataViewItem &item ) const
 249     {
 250         // the invisble root node can have children (in
 251         // our model always "MyMusic")
 252         if (!item.IsOk())
 253             return true;
 254
 255         MyMusicModelNode *node = (MyMusicModelNode*) item.GetID();
 256         return node->IsContainer();
 257     }
 258
 259     virtual wxDataViewItem GetFirstChild( const wxDataViewItem &parent ) const
 260     {
 261         MyMusicModelNode *node = (MyMusicModelNode*) parent.GetID();
 262         if (!node)
 263             return wxDataViewItem( (void*) m_root );
 264
 265         if (node->GetChildCount() == 0)
 266             return wxDataViewItem( 0 );
 267
 268         if (node == m_classical)
 269         {
 270             MyMusicModel *model = (MyMusicModel*)(const MyMusicModel*) this;
 271             model->m_classicalMusicIsKnownToControl = true;
 272         }
 273
 274         MyMusicModelNode *first_child = node->GetChildren().Item( 0 );
 275         return wxDataViewItem( (void*) first_child );
 276     }
 277
 278     virtual wxDataViewItem GetNextSibling( const wxDataViewItem &item ) const
 279     {
 280         MyMusicModelNode *node = (MyMusicModelNode*) item.GetID();
 281
 282         // "MyMusic" has no siblings in our model
 283         if (node == m_root)
 284             return wxDataViewItem(0);
 285
 286         MyMusicModelNode *parent = node->GetParent();
 287         int pos = parent->GetChildren().Index( node );
 288
 289         // Something went wrong
 290         if (pos == wxNOT_FOUND)
 291             return wxDataViewItem(0);
 292
 293         // No more children
 294         if (pos == parent->GetChildCount()-1)
 295             return wxDataViewItem(0);
 296
 297         node = parent->GetChildren().Item( pos+1 );
 298         return wxDataViewItem( (void*) node );
 299     }
 300
 301 private:
 302     MyMusicModelNode*   m_root;
 303     MyMusicModelNode*   m_pop;
 304     MyMusicModelNode*   m_classical;
 305     bool                m_classicalMusicIsKnownToControl;
 306 };
 307
 308 // -------------------------------------
 309 // MyApp
 310 // -------------------------------------
 311
 312 class MyApp: public wxApp
 313 {
 314 public:
 315     bool OnInit(void);
 316     int OnExit();
 317 };
 318
 319 // -------------------------------------
 320 // MyFrame
 321 // -------------------------------------
 322
 323 class MyFrame : public wxFrame
 324 {
 325 public:
 326     MyFrame(wxFrame *frame, wxChar *title, int x, int y, int w, int h);
 327
 328 public:
 329     void OnQuit(wxCommandEvent& event);
 330     void OnAbout(wxCommandEvent& event);
 331     void OnAdd(wxCommandEvent& event);
 332     void OnDelete(wxCommandEvent& event);
 333
 334 private:
 335     wxDataViewCtrl* m_dataview;
 336     wxTextCtrl    * m_log;
 337     wxObjectDataPtr<MyMusicModel> m_model;
 338
 339 private:
 340     DECLARE_EVENT_TABLE()
 341 };
 342
 343 // -------------------------------------
 344 // MyApp
 345 // -------------------------------------
 346
 347 IMPLEMENT_APP(MyApp)
 348
 349 bool MyApp::OnInit(void)
 350 {
 351     if ( !wxApp::OnInit() )
 352         return false;
 353
 354     // build the first frame
 355     MyFrame *frame =
 356         new MyFrame(NULL, wxT("wxDataViewCtrl feature test"), 10, 10, 700, 440);
 357     frame->Show(true);
 358
 359     SetTopWindow(frame);
 360     return true;
 361 }
 362
 363 int MyApp::OnExit()
 364 {
 365     return 0;
 366 }
 367
 368
 369 // -------------------------------------
 370 // MyFrame
 371 // -------------------------------------
 372
 373 enum
 374 {
 375     // file menu
 376     ID_ABOUT = wxID_ABOUT,
 377     ID_EXIT = wxID_EXIT,
 378
 379     ID_ADD = 100,
 380     ID_DELETE = 101,
 381 };
 382
 383 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 384     EVT_MENU( ID_ABOUT, MyFrame::OnAbout )
 385     EVT_MENU( ID_EXIT, MyFrame::OnQuit )
 386     EVT_BUTTON( ID_ADD, MyFrame::OnAdd )
 387     EVT_BUTTON( ID_DELETE, MyFrame::OnDelete )
 388 END_EVENT_TABLE()
 389
 390 MyFrame::MyFrame(wxFrame *frame, wxChar *title, int x, int y, int w, int h):
 391   wxFrame(frame, wxID_ANY, title, wxPoint(x, y), wxSize(w, h))
 392 {
 393     SetIcon(wxICON(sample));
 394
 395     // build the menus:
 396
 397     wxMenu *file_menu = new wxMenu;
 398     file_menu->Append(ID_ABOUT, "&About");
 399     file_menu->AppendSeparator();
 400     file_menu->Append(ID_EXIT, "E&xit");
 401
 402     wxMenuBar *menu_bar = new wxMenuBar;
 403     menu_bar->Append(file_menu, "&File");
 404
 405     SetMenuBar(menu_bar);
 406     CreateStatusBar();
 407
 408     wxBoxSizer *main_sizer = new wxBoxSizer( wxVERTICAL );
 409
 410     m_dataview = new wxDataViewCtrl( this, wxID_ANY, wxDefaultPosition,
 411                                      wxDefaultSize );
 412
 413     m_model = new MyMusicModel;
 414     m_dataview->AssociateModel( m_model.get() );
 415
 416     m_dataview->AppendTextColumn( "Title", 0, wxDATAVIEW_CELL_INERT, 200,
 417                                      DEFAULT_ALIGN, wxDATAVIEW_COL_SORTABLE );
 418     m_dataview->AppendTextColumn( "Artist", 1, wxDATAVIEW_CELL_EDITABLE, 200,
 419                                      DEFAULT_ALIGN, wxDATAVIEW_COL_SORTABLE );
 420     m_dataview->AppendTextColumn( "Year", 2, wxDATAVIEW_CELL_INERT, 50,
 421                                      DEFAULT_ALIGN );
 422
 423     main_sizer->Add( m_dataview, 2, wxGROW );
 424
 425     wxBoxSizer *button_sizer = new wxBoxSizer( wxHORIZONTAL );
 426
 427     button_sizer->Add( new wxButton( this, ID_ADD, "Add Mozart"), 0, wxALL, 10 );
 428     button_sizer->Add( new wxButton( this, ID_DELETE, "Delete selected"), 0, wxALL, 10 );
 429
 430     main_sizer->Add( button_sizer, 0, 0, 0 );
 431
 432     m_log = new wxTextCtrl( this, -1, "", wxDefaultPosition, wxDefaultSize, wxTE_MULTILINE );
 433
 434     main_sizer->Add( m_log, 1, wxGROW );
 435
 436     SetSizer( main_sizer );
 437 }
 438
 439 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event) )
 440 {
 441     Close(true);
 442 }
 443
 444 void MyFrame::OnDelete(wxCommandEvent& WXUNUSED(event) )
 445 {
 446     wxDataViewItem item = m_dataview->GetSelection();
 447     if (item.IsOk())
 448         m_model->Delete( item );
 449 }
 450
 451 void MyFrame::OnAdd(wxCommandEvent& WXUNUSED(event) )
 452 {
 453     m_model->AddToClassical( "Kleine Nachtmusik", "Wolfgang Mozart", "1787" );
 454 }
 455
 456 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event) )
 457 {
 458     wxAboutDialogInfo info;
 459     info.SetName(_("DataView sample"));
 460     info.SetDescription(_("This sample demonstrates the dataview control handling"));
 461     info.SetCopyright(_T("(C) 2007 Robert Roebling"));
 462
 463     wxAboutBox(info);
 464 }
 465