samples/regtest/regtest.cpp

   1 ///////////////////////////////////////////////////////////////////////////////
   2 // Name:        registry.cpp
   3 // Purpose:     wxRegKey class demo
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     03.04.98
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 ///////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19 #include "wx/wxprec.h"
  20
  21 #ifdef  __BORLANDC__
  22   #pragma hdrstop
  23 #endif
  24
  25 #ifndef WX_PRECOMP
  26   #include "wx/wx.h"
  27 #endif
  28
  29 #include "wx/log.h"
  30 #include "wx/treectrl.h"
  31 #include "wx/msw/registry.h"
  32 #include "wx/msw/imaglist.h"
  33
  34 // ----------------------------------------------------------------------------
  35 // application type
  36 // ----------------------------------------------------------------------------
  37 class RegApp : public wxApp
  38 {
  39 public:
  40   bool OnInit(void);
  41 };
  42
  43 // ----------------------------------------------------------------------------
  44 // image list with registry icons
  45 // ----------------------------------------------------------------------------
  46 class RegImageList : public wxImageList
  47 {
  48 public:
  49   enum Icon
  50   {
  51     Root,
  52     ClosedKey,
  53     OpenedKey,
  54     TextValue,
  55     BinaryValue,
  56   };
  57
  58   RegImageList();
  59 };
  60
  61 // array of children of the node
  62 //class TreeNode;
  63
  64 // ----------------------------------------------------------------------------
  65 // our control
  66 // ----------------------------------------------------------------------------
  67 class RegTreeCtrl : public wxTreeCtrl
  68 {
  69 public:
  70   // ctor & dtor
  71   RegTreeCtrl(wxWindow *parent, wxWindowID id);
  72   virtual ~RegTreeCtrl();
  73
  74   // notifications
  75   void OnDeleteItem   (wxTreeEvent& event);
  76   void OnItemExpanding(wxTreeEvent& event);
  77   void OnSelChanged   (wxTreeEvent& event);
  78
  79   void OnRightClick   (wxMouseEvent& event);
  80   void OnChar         (wxKeyEvent& event);
  81
  82   // forwarded notifications (by the frame)
  83   void OnMenuTest();
  84
  85   // operations
  86   void DeleteSelected();
  87   void CreateNewKey(const wxString& strName);
  88   void CreateNewTextValue(const wxString& strName);
  89   void CreateNewBinaryValue(const wxString& strName);
  90
  91   // information
  92   bool IsKeySelected() const;
  93
  94   DECLARE_EVENT_TABLE();
  95
  96 private:
  97
  98   // structure describing a registry key/value
  99         class TreeNode : public wxTreeItemData
 100   {
 101 WX_DEFINE_ARRAY(TreeNode *, TreeChildren);
 102   public:
 103     RegTreeCtrl  *m_pTree;     // must be !NULL
 104     TreeNode     *m_pParent;    // NULL only for the root node
 105     long          m_id;         // the id of the tree control item
 106     wxString      m_strName;    // name of the key/value
 107     TreeChildren  m_aChildren;  // array of subkeys/values
 108     bool          m_bKey;       // key or value?
 109     wxRegKey     *m_pKey;       // only may be !NULL if m_bKey == true
 110     long          m_lDummy;     // dummy subkey (to make expansion possible)
 111
 112     // ctor
 113     TreeNode() { m_lDummy = 0; }
 114
 115     // trivial accessors
 116     long      Id()     const { return m_id;              }
 117     bool      IsRoot() const { return m_pParent == NULL; }
 118     bool      IsKey()  const { return m_bKey;            }
 119     TreeNode *Parent() const { return m_pParent;         }
 120
 121     // notifications
 122     bool OnExpand();
 123     void OnCollapse();
 124
 125     // operations
 126     void Refresh() { OnCollapse(); OnExpand(); }
 127     void AddDummy();
 128     void DestroyChildren();
 129     const char *FullName() const;
 130
 131     // get the associated key: make sure the pointer is !NULL
 132     wxRegKey& Key() { if ( !m_pKey ) OnExpand(); return *m_pKey; }
 133
 134     // dtor deletes all children
 135     ~TreeNode();
 136   };
 137
 138   wxMenu      *m_pMenuPopup;
 139   TreeNode    *m_pRoot;
 140   wxImageList *m_imageList;
 141
 142   TreeNode *GetNode(const wxTreeEvent& event)
 143     { return (TreeNode *)GetItemData((WXHTREEITEM)event.GetItem()); }
 144
 145 public:
 146   // create a new node and insert it to the tree
 147   TreeNode *InsertNewTreeNode(TreeNode *pParent,
 148                               const wxString& strName,
 149                               int idImage = RegImageList::ClosedKey,
 150                               const wxString *pstrValue = NULL);
 151   // add standard registry keys
 152   void AddStdKeys();
 153 };
 154
 155 // ----------------------------------------------------------------------------
 156 // the main window of our application
 157 // ----------------------------------------------------------------------------
 158 class RegFrame : public wxFrame
 159 {
 160 public:
 161   // ctor & dtor
 162   RegFrame(wxFrame *parent, char *title, int x, int y, int w, int h);
 163   virtual ~RegFrame(void);
 164
 165   // callbacks
 166   void OnQuit (wxCommandEvent& event);
 167   void OnAbout(wxCommandEvent& event);
 168   void OnTest (wxCommandEvent& event);
 169
 170   void OnExpand  (wxCommandEvent& event);
 171   void OnCollapse(wxCommandEvent& event);
 172   void OnToggle  (wxCommandEvent& event);
 173
 174   void OnDelete   (wxCommandEvent& event);
 175   void OnNewKey   (wxCommandEvent& event);
 176   void OnNewText  (wxCommandEvent& event);
 177   void OnNewBinary(wxCommandEvent& event);
 178
 179   bool OnClose  () { return TRUE; }
 180
 181   DECLARE_EVENT_TABLE();
 182
 183 private:
 184   RegTreeCtrl *m_treeCtrl;
 185 };
 186
 187 // ----------------------------------------------------------------------------
 188 // various ids
 189 // ----------------------------------------------------------------------------
 190
 191 enum
 192 {
 193   Menu_Quit     = 100,
 194   Menu_About,
 195   Menu_Test,
 196   Menu_Expand,
 197   Menu_Collapse,
 198   Menu_Toggle,
 199   Menu_New,
 200   Menu_NewKey,
 201   Menu_NewText,
 202   Menu_NewBinary,
 203   Menu_Delete,
 204
 205   Ctrl_RegTree  = 200,
 206 };
 207
 208 // ----------------------------------------------------------------------------
 209 // event tables
 210 // ----------------------------------------------------------------------------
 211
 212 BEGIN_EVENT_TABLE(RegFrame, wxFrame)
 213   EVT_MENU(Menu_Test,     RegFrame::OnTest)
 214   EVT_MENU(Menu_About,    RegFrame::OnAbout)
 215   EVT_MENU(Menu_Quit,     RegFrame::OnQuit)
 216   EVT_MENU(Menu_Expand,   RegFrame::OnExpand)
 217   EVT_MENU(Menu_Collapse, RegFrame::OnCollapse)
 218   EVT_MENU(Menu_Toggle,   RegFrame::OnToggle)
 219   EVT_MENU(Menu_Delete,   RegFrame::OnDelete)
 220   EVT_MENU(Menu_NewKey,   RegFrame::OnNewKey)
 221   EVT_MENU(Menu_NewText,  RegFrame::OnNewText)
 222   EVT_MENU(Menu_NewBinary,RegFrame::OnNewBinary)
 223 END_EVENT_TABLE()
 224
 225 BEGIN_EVENT_TABLE(RegTreeCtrl, wxTreeCtrl)
 226   EVT_TREE_DELETE_ITEM   (Ctrl_RegTree, RegTreeCtrl::OnDeleteItem)
 227   EVT_TREE_ITEM_EXPANDING(Ctrl_RegTree, RegTreeCtrl::OnItemExpanding)
 228   EVT_TREE_SEL_CHANGED   (Ctrl_RegTree, RegTreeCtrl::OnSelChanged)
 229
 230   EVT_CHAR      (RegTreeCtrl::OnChar)
 231   EVT_RIGHT_DOWN(RegTreeCtrl::OnRightClick)
 232 END_EVENT_TABLE()
 233
 234 // ============================================================================
 235 // implementation
 236 // ============================================================================
 237
 238 // ----------------------------------------------------------------------------
 239 // global functions
 240 // ----------------------------------------------------------------------------
 241
 242 // create the "registry operations" menu
 243 wxMenu *CreateRegistryMenu()
 244 {
 245   wxMenu *pMenuNew = new wxMenu;
 246   pMenuNew->Append(Menu_NewKey,    "&Key",          "Create a new key");
 247   pMenuNew->AppendSeparator();
 248   pMenuNew->Append(Menu_NewText,   "&Text value",   "Create a new text value");
 249   pMenuNew->Append(Menu_NewBinary, "&Binary value", "Create a new binary value");
 250
 251   wxMenu *pMenuReg = new wxMenu;
 252   pMenuReg->Append(Menu_New, "&New", pMenuNew);
 253   pMenuReg->Append(Menu_Delete,   "&Delete...", "Delete selected key/value");
 254   pMenuReg->AppendSeparator();
 255   pMenuReg->Append(Menu_Expand,   "&Expand",    "Expand current key");
 256   pMenuReg->Append(Menu_Collapse, "&Collapse",  "Collapse current key");
 257   pMenuReg->Append(Menu_Toggle,   "&Toggle",    "Toggle current key");
 258
 259   return pMenuReg;
 260 }
 261
 262 // ----------------------------------------------------------------------------
 263 // application class
 264 // ----------------------------------------------------------------------------
 265 IMPLEMENT_APP(RegApp)
 266
 267 // `Main program' equivalent, creating windows and returning main app frame
 268 bool RegApp::OnInit()
 269 {
 270   // create the main frame window and show it
 271   RegFrame *frame = new RegFrame(NULL, "wxRegKey Test", 50, 50, 600, 350);
 272   frame->Show(TRUE);
 273
 274   SetTopWindow(frame);
 275
 276   return TRUE;
 277 }
 278
 279 // ----------------------------------------------------------------------------
 280 // RegFrame
 281 // ----------------------------------------------------------------------------
 282
 283 RegFrame::RegFrame(wxFrame *parent, char *title, int x, int y, int w, int h)
 284         : wxFrame(parent, -1, title, wxPoint(x, y), wxSize(w, h))
 285 {
 286   // this reduces flicker effects
 287   SetBackgroundColour(wxColour(255, 255, 255));
 288
 289   // set the icon
 290   // ------------
 291   SetIcon(wxIcon("app_icon"));
 292
 293   // create menu
 294   // -----------
 295   wxMenu *pMenuFile = new wxMenu;
 296   pMenuFile->Append(Menu_Test, "Te&st", "Test key creation");
 297   pMenuFile->AppendSeparator();
 298   pMenuFile->Append(Menu_About, "&About...", "Show an extraordinarly beautiful dialog");
 299   pMenuFile->AppendSeparator();
 300   pMenuFile->Append(Menu_Quit,  "E&xit", "Quit this program");
 301
 302   wxMenuBar *pMenu = new wxMenuBar;
 303   pMenu->Append(pMenuFile, "&File");
 304   pMenu->Append(CreateRegistryMenu(),  "&Registry");
 305   SetMenuBar(pMenu);
 306
 307   // create child controls
 308   // ---------------------
 309   m_treeCtrl = new RegTreeCtrl(this, Ctrl_RegTree);
 310
 311   // create the status line
 312   // ----------------------
 313   int aWidths[2];
 314   aWidths[0] = 200;
 315   aWidths[1] = -1;
 316   CreateStatusBar(2);
 317   SetStatusWidths(2, aWidths);
 318 }
 319
 320 RegFrame::~RegFrame(void)
 321 {
 322 }
 323
 324 void RegFrame::OnQuit(wxCommandEvent& event)
 325 {
 326   Close(TRUE);
 327 }
 328
 329 void RegFrame::OnAbout(wxCommandEvent& event)
 330 {
 331   wxMessageDialog dialog(this, "wxRegistry sample\n(c) 1998 Vadim Zeitlin",
 332                          "About wxRegistry", wxOK);
 333
 334   dialog.ShowModal();
 335 }
 336
 337 void RegFrame::OnTest(wxCommandEvent& event)
 338 {
 339   m_treeCtrl->OnMenuTest();
 340 }
 341
 342 void RegFrame::OnExpand(wxCommandEvent& event)
 343 {
 344   m_treeCtrl->ExpandItem(m_treeCtrl->GetSelection(), wxTREE_EXPAND_EXPAND);
 345 }
 346
 347 void RegFrame::OnCollapse(wxCommandEvent& event)
 348 {
 349   m_treeCtrl->ExpandItem(m_treeCtrl->GetSelection(), wxTREE_EXPAND_COLLAPSE);
 350 }
 351
 352 void RegFrame::OnToggle(wxCommandEvent& event)
 353 {
 354   m_treeCtrl->ExpandItem(m_treeCtrl->GetSelection(), wxTREE_EXPAND_TOGGLE);
 355 }
 356
 357 void RegFrame::OnDelete(wxCommandEvent& event)
 358 {
 359   m_treeCtrl->DeleteSelected();
 360 }
 361
 362 void RegFrame::OnNewKey(wxCommandEvent& event)
 363 {
 364   if ( m_treeCtrl->IsKeySelected() ) {
 365     m_treeCtrl->CreateNewKey(
 366       wxGetTextFromUser("Enter the name of the new key"));
 367   }
 368 }
 369
 370 void RegFrame::OnNewText(wxCommandEvent& event)
 371 {
 372   if ( m_treeCtrl->IsKeySelected() ) {
 373     m_treeCtrl->CreateNewTextValue(
 374       wxGetTextFromUser("Enter the name for the new text value"));
 375   }
 376 }
 377
 378 void RegFrame::OnNewBinary(wxCommandEvent& event)
 379 {
 380   if ( m_treeCtrl->IsKeySelected() ) {
 381     m_treeCtrl->CreateNewBinaryValue(
 382       wxGetTextFromUser("Enter the name for the new binary value"));
 383   }
 384 }
 385
 386 // ----------------------------------------------------------------------------
 387 // RegImageList
 388 // ----------------------------------------------------------------------------
 389 RegImageList::RegImageList() : wxImageList(16, 16, TRUE)
 390 {
 391   // should be in sync with enum RegImageList::RegIcon
 392   static const char *aszIcons[] = { "key1","key2","key3","value1","value2" };
 393   wxString str = "icon_";
 394   for ( unsigned int n = 0; n < WXSIZEOF(aszIcons); n++ ) {
 395     Add(wxIcon(str + aszIcons[n], wxBITMAP_TYPE_ICO_RESOURCE));
 396   }
 397 }
 398
 399 // ----------------------------------------------------------------------------
 400 // RegTreeCtrl
 401 // ----------------------------------------------------------------------------
 402
 403 // create a new tree item and insert it into the tree
 404 RegTreeCtrl::TreeNode *RegTreeCtrl::InsertNewTreeNode(TreeNode *pParent,
 405                                                       const wxString& strName,
 406                                                       int idImage,
 407                                                       const wxString *pstrValue)
 408 {
 409   // create new item & insert it
 410   TreeNode *pNewNode = new TreeNode;
 411   pNewNode->m_pTree  = this;
 412   pNewNode->m_pParent = pParent;
 413   pNewNode->m_strName = strName;
 414   pNewNode->m_bKey    = pstrValue == NULL;
 415   pNewNode->m_pKey    = NULL;
 416   pNewNode->m_id      = InsertItem(pParent ? pParent->m_id : 0,
 417                                    pNewNode->IsKey() ? strName : *pstrValue,
 418                                    idImage);
 419
 420   wxASSERT_MSG( pNewNode->m_id, "can't create tree control item!");
 421
 422   // save the pointer in the item
 423   SetItemData(pNewNode->m_id, pNewNode);
 424
 425   // add it to the list of parent's children
 426   if ( pParent != NULL ) {
 427     pParent->m_aChildren.Add(pNewNode);
 428   }
 429
 430   // force the [+] button (@@@ not very elegant...)
 431   if ( pNewNode->IsKey() )
 432     pNewNode->AddDummy();
 433
 434   return pNewNode;
 435 }
 436
 437 RegTreeCtrl::RegTreeCtrl(wxWindow *parent, wxWindowID id)
 438            : wxTreeCtrl(parent, id, wxDefaultPosition, wxDefaultSize,
 439                         wxTR_HAS_BUTTONS | wxSUNKEN_BORDER)
 440 {
 441   // create the image list
 442   // ---------------------
 443   m_imageList = new RegImageList;
 444   SetImageList(m_imageList, wxIMAGE_LIST_NORMAL);
 445
 446   // create root keys
 447   // ----------------
 448   m_pRoot = InsertNewTreeNode(NULL, "Registry Root", RegImageList::Root);
 449
 450   // create popup menu
 451   // -----------------
 452   m_pMenuPopup = CreateRegistryMenu();
 453 }
 454
 455 RegTreeCtrl::~RegTreeCtrl()
 456 {
 457   delete m_pMenuPopup;
 458   delete m_pRoot;
 459   delete m_imageList;
 460 }
 461
 462 void RegTreeCtrl::AddStdKeys()
 463 {
 464   for ( unsigned int ui = 0; ui < wxRegKey::nStdKeys; ui++ ) {
 465     InsertNewTreeNode(m_pRoot, wxRegKey::GetStdKeyName(ui));
 466   }
 467 }
 468
 469 // ----------------------------------------------------------------------------
 470 // notifications
 471 // ----------------------------------------------------------------------------
 472
 473 void RegTreeCtrl::OnRightClick(wxMouseEvent& event)
 474 {
 475   int iFlags;
 476   long lId = HitTest(wxPoint(event.GetX(), event.GetY()), iFlags);
 477   if ( iFlags & wxTREE_HITTEST_ONITEMLABEL ) {
 478     // popup menu only if an item was clicked
 479     wxASSERT( lId != 0 );
 480     SelectItem(lId);
 481     PopupMenu(m_pMenuPopup, event.GetX(), event.GetY());
 482   }
 483 }
 484
 485
 486 void RegTreeCtrl::OnDeleteItem(wxTreeEvent& event)
 487 {
 488 }
 489
 490 // test the key creation functions
 491 void RegTreeCtrl::OnMenuTest()
 492 {
 493   long lId = GetSelection();
 494   TreeNode *pNode = (TreeNode *)GetItemData(lId);
 495
 496   wxCHECK_RET( pNode != NULL, "tree item without data?" );
 497
 498   if ( pNode->IsRoot() ) {
 499     wxLogError("Can't create a subkey under the root key.");
 500     return;
 501   }
 502   if ( !pNode->IsKey() ) {
 503     wxLogError("Can't create a subkey under a value!");
 504     return;
 505   }
 506
 507   wxRegKey key1(pNode->Key(), "key1");
 508   if ( key1.Create() ) {
 509     wxRegKey key2a(key1, "key2a"), key2b(key1, "key2b");
 510     if ( key2a.Create() && key2b.Create() ) {
 511       // put some values under the newly created keys
 512       key1.SetValue("first_term", "10");
 513       key1.SetValue("second_term", "7");
 514       key2a = "this is the unnamed value";
 515       key2b.SetValue("sum", 17);
 516
 517       // refresh tree
 518       pNode->Refresh();
 519       wxLogStatus("Test keys successfully added.");
 520       return;
 521     }
 522   }
 523
 524   wxLogError("Creation of test keys failed.");
 525 }
 526
 527 void RegTreeCtrl::OnChar(wxKeyEvent& event)
 528 {
 529   if ( event.KeyCode() == WXK_DELETE )
 530     DeleteSelected();
 531   else
 532     event.Skip();
 533 }
 534
 535 void RegTreeCtrl::OnSelChanged(wxTreeEvent& event)
 536 {
 537   wxFrame *pFrame = (wxFrame *)(wxWindow::GetParent());
 538   pFrame->SetStatusText(GetNode(event)->FullName(), 1);
 539 }
 540
 541 void RegTreeCtrl::OnItemExpanding(wxTreeEvent& event)
 542 {
 543   TreeNode *pNode = GetNode(event);
 544   bool bExpanding = event.GetCode() == wxTREE_EXPAND_EXPAND;
 545
 546   // expansion might take some time
 547   wxSetCursor(*wxHOURGLASS_CURSOR);
 548   wxLogStatus("Working...");
 549   wxYield();  // to give the status line a chance to refresh itself
 550
 551   if ( pNode->IsKey() ) {
 552     if ( bExpanding ) {
 553       // expanding: add subkeys/values
 554       if ( !pNode->OnExpand() )
 555         return;
 556     }
 557     else {
 558       // collapsing: clean up
 559       pNode->OnCollapse();
 560     }
 561
 562     // change icon for non root key
 563     if ( !pNode->IsRoot() ) {
 564       int idIcon = bExpanding ? RegImageList::OpenedKey
 565                               : RegImageList::ClosedKey;
 566       SetItemImage(pNode->Id(), idIcon);
 567     }
 568   }
 569
 570   wxLogStatus("Ok");
 571   wxSetCursor(*wxSTANDARD_CURSOR);
 572 }
 573
 574 // ----------------------------------------------------------------------------
 575 // TreeNode implementation
 576 // ----------------------------------------------------------------------------
 577 bool RegTreeCtrl::TreeNode::OnExpand()
 578 {
 579   // remove dummy item
 580   if ( m_lDummy != 0 ) {
 581     m_pTree->Delete(m_lDummy);
 582     m_lDummy = 0;
 583   }
 584   else {
 585     // we've been already expanded
 586     return TRUE;
 587   }
 588
 589   if ( IsRoot() ) {
 590     // we're the root key
 591     m_pTree->AddStdKeys();
 592     return TRUE;
 593   }
 594
 595   if ( Parent()->IsRoot() ) {
 596     // we're a standard key
 597     m_pKey = new wxRegKey(m_strName);
 598   }
 599   else {
 600     // we're a normal key
 601     m_pKey = new wxRegKey(*(Parent()->m_pKey), m_strName);
 602   }
 603
 604   if ( !m_pKey->Open() ) {
 605     wxLogError("The key '%s' can't be opened.", FullName());
 606     return FALSE;
 607   }
 608
 609   // enumeration variables
 610   long l;
 611   wxString str;
 612   bool bCont;
 613
 614   // enumerate all subkeys
 615   bCont = m_pKey->GetFirstKey(str, l);
 616   while ( bCont ) {
 617     m_pTree->InsertNewTreeNode(this, str, RegImageList::ClosedKey);
 618     bCont = m_pKey->GetNextKey(str, l);
 619   }
 620
 621   // enumerate all values
 622   bCont = m_pKey->GetFirstValue(str, l);
 623   while ( bCont ) {
 624     wxString strItem;
 625     if (str.IsEmpty())
 626         strItem = "<default>";
 627     else
 628         strItem = str;
 629     strItem += " = ";
 630
 631     // determine the appropriate icon
 632     RegImageList::Icon icon;
 633     switch ( m_pKey->GetValueType(str) ) {
 634       case wxRegKey::Type_String:
 635       case wxRegKey::Type_Expand_String:
 636       case wxRegKey::Type_Multi_String:
 637         {
 638           wxString strValue;
 639           icon = RegImageList::TextValue;
 640           m_pKey->QueryValue(str, strValue);
 641           strItem += strValue;
 642         }
 643         break;
 644
 645       case wxRegKey::Type_None:
 646         // @@ handle the error...
 647         icon = RegImageList::BinaryValue;
 648         break;
 649
 650       case wxRegKey::Type_Dword:
 651         {
 652           char szBuf[128];
 653           long l;
 654           m_pKey->QueryValue(str, &l);
 655           sprintf(szBuf, "%lx", l);
 656           strItem += szBuf;
 657         }
 658
 659         // fall through
 660
 661       default:
 662         icon = RegImageList::BinaryValue;
 663     }
 664
 665     m_pTree->InsertNewTreeNode(this, str, icon, &strItem);
 666     bCont = m_pKey->GetNextValue(str, l);
 667   }
 668
 669   return TRUE;
 670 }
 671
 672 void RegTreeCtrl::TreeNode::OnCollapse()
 673 {
 674   bool bHasChildren = !m_aChildren.IsEmpty();
 675   DestroyChildren();
 676   if ( bHasChildren )
 677     AddDummy();
 678   else
 679     m_lDummy = 0;
 680
 681   delete m_pKey;
 682   m_pKey = NULL;
 683 }
 684
 685 void RegTreeCtrl::TreeNode::AddDummy()
 686 {
 687   // insert dummy item forcing appearance of [+] button
 688   m_lDummy = m_pTree->InsertItem(Id(), "");
 689 }
 690
 691 void RegTreeCtrl::TreeNode::DestroyChildren()
 692 {
 693   // destroy all children
 694   unsigned int nCount = m_aChildren.Count();
 695   for ( unsigned int n = 0; n < nCount; n++ ) {
 696           long lId = m_aChildren[n]->Id();
 697     delete m_aChildren[n];
 698     m_pTree->Delete(lId);
 699   }
 700
 701   m_aChildren.Empty();
 702 }
 703
 704 RegTreeCtrl::TreeNode::~TreeNode()
 705 {
 706   DestroyChildren();
 707
 708   delete m_pKey;
 709 }
 710
 711 const char *RegTreeCtrl::TreeNode::FullName() const
 712 {
 713   static wxString s_strName;
 714
 715   if ( IsRoot() ) {
 716     return "Registry Root";
 717   }
 718   else {
 719     // our own registry key might not (yet) exist or we might be a value,
 720     // so just use the parent's and concatenate
 721     s_strName = Parent()->FullName();
 722     s_strName << '\\' << m_strName;
 723
 724     return s_strName;
 725   }
 726 }
 727
 728 // ----------------------------------------------------------------------------
 729 // operations on RegTreeCtrl
 730 // ----------------------------------------------------------------------------
 731
 732 void RegTreeCtrl::DeleteSelected()
 733 {
 734   long lCurrent = GetSelection(),
 735        lParent  = GetParent(lCurrent);
 736
 737   if ( lParent == 0 ) {
 738     wxLogError("Can't delete root key.");
 739     return;
 740   }
 741
 742   TreeNode *pCurrent = (TreeNode *)GetItemData(lCurrent),
 743            *pParent  = (TreeNode *)GetItemData(lParent);
 744
 745   wxCHECK_RET( pCurrent && pParent, "either node or parent without data?" );
 746
 747   if ( pParent->IsRoot() ) {
 748     wxLogError("Can't delete standard key.");
 749     return;
 750   }
 751
 752   if ( pCurrent->IsKey() ) {
 753     if ( wxMessageBox("Do you really want to delete this key?",
 754                       "Confirmation",
 755                       wxICON_QUESTION | wxYES_NO | wxCANCEL, this) != wxYES ) {
 756       return;
 757     }
 758
 759     // must close key before deleting it
 760     pCurrent->OnCollapse();
 761
 762     if ( pParent->Key().DeleteKey(pCurrent->m_strName) )
 763       pParent->Refresh();
 764   }
 765   else {
 766     if ( wxMessageBox("Do you really want to delete this value?",
 767                       "Confirmation",
 768                       wxICON_QUESTION | wxYES_NO | wxCANCEL, this) != wxYES ) {
 769       return;
 770     }
 771
 772     if ( pParent->Key().DeleteValue(pCurrent->m_strName) )
 773       pParent->Refresh();
 774   }
 775 }
 776
 777 void RegTreeCtrl::CreateNewKey(const wxString& strName)
 778 {
 779   long lCurrent = GetSelection();
 780   TreeNode *pCurrent = (TreeNode *)GetItemData(lCurrent);
 781
 782   wxCHECK_RET( pCurrent != NULL, "node without data?" );
 783
 784   wxASSERT( pCurrent->IsKey() );  // check must have been done before
 785
 786   if ( pCurrent->IsRoot() ) {
 787     wxLogError("Can't create a new key under the root key.");
 788     return;
 789   }
 790
 791   wxRegKey key(pCurrent->Key(), strName);
 792   if ( key.Create() )
 793     pCurrent->Refresh();
 794 }
 795
 796 void RegTreeCtrl::CreateNewTextValue(const wxString& strName)
 797 {
 798   long lCurrent = GetSelection();
 799   TreeNode *pCurrent = (TreeNode *)GetItemData(lCurrent);
 800
 801   wxCHECK_RET( pCurrent != NULL, "node without data?" );
 802
 803   wxASSERT( pCurrent->IsKey() );  // check must have been done before
 804
 805   if ( pCurrent->IsRoot() ) {
 806     wxLogError("Can't create a new value under the root key.");
 807     return;
 808   }
 809
 810   if ( pCurrent->Key().SetValue(strName, "") )
 811     pCurrent->Refresh();
 812 }
 813
 814 void RegTreeCtrl::CreateNewBinaryValue(const wxString& strName)
 815 {
 816   long lCurrent = GetSelection();
 817   TreeNode *pCurrent = (TreeNode *)GetItemData(lCurrent);
 818
 819   wxCHECK_RET( pCurrent != NULL, "node without data?" );
 820
 821   wxASSERT( pCurrent->IsKey() );  // check must have been done before
 822
 823   if ( pCurrent->IsRoot() ) {
 824     wxLogError("Can't create a new value under the root key.");
 825     return;
 826   }
 827
 828   if ( pCurrent->Key().SetValue(strName, 0) )
 829     pCurrent->Refresh();
 830 }
 831
 832 bool RegTreeCtrl::IsKeySelected() const
 833 {
 834   long lCurrent = GetSelection();
 835   TreeNode *pCurrent = (TreeNode *)GetItemData(lCurrent);
 836
 837   wxCHECK( pCurrent != NULL, FALSE );
 838
 839   return pCurrent->IsKey();
 840 }