include/wx/msw/treectrl.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        treectrl.h
   3 // Purpose:     wxTreeCtrl class
   4 // Author:      Julian Smart
   5 // Modified by: Vadim Zeitlin to be less MSW-specific on 10/10/98
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Julian Smart and Markus Holzem
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_TREECTRL_H_
  13 #define _WX_TREECTRL_H_
  14
  15 // ----------------------------------------------------------------------------
  16 // headers
  17 // ----------------------------------------------------------------------------
  18 #ifdef __GNUG__
  19     #pragma interface "treectrl.h"
  20 #endif
  21
  22 #include "wx/control.h"
  23 #include "wx/event.h"
  24 #include "wx/textctrl.h"
  25
  26 // the type for "untyped" data
  27 typedef long wxDataType;
  28
  29 // fwd decl
  30 class  WXDLLEXPORT wxImageList;
  31 struct WXDLLEXPORT wxTreeViewItem;
  32
  33 // a callback function used for sorting tree items, it should return -1 if the
  34 // first item precedes the second, +1 if the second precedes the first or 0 if
  35 // they're equivalent
  36 class wxTreeItemData;
  37
  38 // ----------------------------------------------------------------------------
  39 // constants
  40 // ----------------------------------------------------------------------------
  41
  42 // values for the `flags' parameter of wxTreeCtrl::HitTest() which determine
  43 // where exactly the specified point is situated:
  44     // above the client area.
  45 static const int wxTREE_HITTEST_ABOVE            = 0x0001;
  46     // below the client area.
  47 static const int wxTREE_HITTEST_BELOW            = 0x0002;
  48     // in the client area but below the last item.
  49 static const int wxTREE_HITTEST_NOWHERE          = 0x0004;
  50     // on the button associated with an item.
  51 static const int wxTREE_HITTEST_ONITEMBUTTON     = 0x0010;
  52     // on the bitmap associated with an item.
  53 static const int wxTREE_HITTEST_ONITEMICON       = 0x0020;
  54     // in the indentation associated with an item.
  55 static const int wxTREE_HITTEST_ONITEMINDENT     = 0x0040;
  56     // on the label (string) associated with an item.
  57 static const int wxTREE_HITTEST_ONITEMLABEL      = 0x0080;
  58     // in the area to the right of an item.
  59 static const int wxTREE_HITTEST_ONITEMRIGHT      = 0x0100;
  60     // on the state icon for a tree view item that is in a user-defined state.
  61 static const int wxTREE_HITTEST_ONITEMSTATEICON  = 0x0200;
  62     // to the right of the client area.
  63 static const int wxTREE_HITTEST_TOLEFT           = 0x0400;
  64     // to the left of the client area.
  65 static const int wxTREE_HITTEST_TORIGHT          = 0x0800;
  66     // anywhere on the item
  67 static const int wxTREE_HITTEST_ONITEM  = wxTREE_HITTEST_ONITEMICON |
  68                                           wxTREE_HITTEST_ONITEMLABEL |
  69                                           wxTREE_HITTEST_ONITEMSTATEICON;
  70
  71 // NB: all the following flags are for compatbility only and will be removed in the
  72 //     next versions
  73
  74 // flags for deprecated `Expand(int action)'
  75 enum
  76 {
  77     wxTREE_EXPAND_EXPAND,
  78     wxTREE_EXPAND_COLLAPSE,
  79     wxTREE_EXPAND_COLLAPSE_RESET,
  80     wxTREE_EXPAND_TOGGLE
  81 };
  82
  83 // flags for deprecated InsertItem() variant
  84 #define wxTREE_INSERT_FIRST 0xFFFF0001
  85 #define wxTREE_INSERT_LAST  0xFFFF0002
  86
  87 // ----------------------------------------------------------------------------
  88 // wxTreeItemId identifies an element of the tree. In this implementation, it's
  89 // just a trivial wrapper around Win32 HTREEITEM. It's opaque for the
  90 // application.
  91 // ----------------------------------------------------------------------------
  92 class WXDLLEXPORT wxTreeItemId
  93 {
  94 public:
  95     // ctors
  96         // 0 is invalid value for HTREEITEM
  97     wxTreeItemId() { m_itemId = 0; }
  98
  99         // default copy ctor/assignment operator are ok for us
 100
 101     // accessors
 102         // is this a valid tree item?
 103     bool IsOk() const { return m_itemId != 0; }
 104
 105     // conversion to/from either real (system-dependent) tree item id or
 106     // to "long" which used to be the type for tree item ids in previous
 107     // versions of wxWindows
 108
 109     // for wxTreeCtrl usage only
 110     wxTreeItemId(WXHTREEITEM itemId) { m_itemId = (long)itemId; }
 111     operator WXHTREEITEM() const { return (WXHTREEITEM)m_itemId; }
 112
 113     void operator=(WXHTREEITEM item) { m_itemId = (long) item; }
 114
 115 protected:
 116     long m_itemId;
 117 };
 118
 119 // ----------------------------------------------------------------------------
 120 // wxTreeItemData is some (arbitrary) user class associated with some item. The
 121 // main advantage of having this class (compared to old untyped interface) is
 122 // that wxTreeItemData's are destroyed automatically by the tree and, as this
 123 // class has virtual dtor, it means that the memory will be automatically
 124 // freed. OTOH, we don't just use wxObject instead of wxTreeItemData because
 125 // the size of this class is critical: in any real application, each tree leaf
 126 // will have wxTreeItemData associated with it and number of leaves may be
 127 // quite big.
 128 //
 129 // Because the objects of this class are deleted by the tree, they should
 130 // always be allocated on the heap!
 131 // ----------------------------------------------------------------------------
 132 class WXDLLEXPORT wxTreeItemData : private wxTreeItemId
 133 {
 134 public:
 135     // default ctor/copy ctor/assignment operator are ok
 136
 137     // dtor is virtual and all the items are deleted by the tree control when
 138     // it's deleted, so you normally don't have to care about freeing memory
 139     // allocated in your wxTreeItemData-derived class
 140     virtual ~wxTreeItemData() { }
 141
 142     // accessors: set/get the item associated with this node
 143     void SetId(const wxTreeItemId& id) { m_itemId = id; }
 144 #ifdef __WATCOMC__
 145     const wxTreeItemId GetId() const { return m_itemId; }
 146 #else
 147     const wxTreeItemId& GetId() const { return (wxTreeItemId&) m_itemId; }
 148 #endif
 149 };
 150
 151 // ----------------------------------------------------------------------------
 152 // wxTreeCtrl
 153 // ----------------------------------------------------------------------------
 154 class WXDLLEXPORT wxTreeCtrl : public wxControl
 155 {
 156 public:
 157     // creation
 158     // --------
 159     wxTreeCtrl() { Init(); }
 160
 161     wxTreeCtrl(wxWindow *parent, wxWindowID id = -1,
 162                const wxPoint& pos = wxDefaultPosition,
 163                const wxSize& size = wxDefaultSize,
 164                long style = wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT,
 165                const wxValidator& validator = wxDefaultValidator,
 166                const wxString& name = "wxTreeCtrl")
 167     {
 168         Create(parent, id, pos, size, style, validator, name);
 169     }
 170
 171     virtual ~wxTreeCtrl();
 172
 173     bool Create(wxWindow *parent, wxWindowID id = -1,
 174                 const wxPoint& pos = wxDefaultPosition,
 175                 const wxSize& size = wxDefaultSize,
 176                 long style = wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT,
 177                 const wxValidator& validator = wxDefaultValidator,
 178                 const wxString& name = "wxTreeCtrl");
 179
 180     // accessors
 181     // ---------
 182
 183         // get the total number of items in the control
 184     size_t GetCount() const;
 185
 186         // indent is the number of pixels the children are indented relative to
 187         // the parents position. SetIndent() also redraws the control
 188         // immediately.
 189     unsigned int GetIndent() const;
 190     void SetIndent(unsigned int indent);
 191
 192         // spacing is the number of pixels between the start and the Text
 193         // not implemented under wxMSW
 194     unsigned int GetSpacing() const { return 18; } // return wxGTK default
 195     void SetSpacing(unsigned int ) {}
 196
 197         // image list: these functions allow to associate an image list with
 198         // the control and retrieve it. Note that the control does _not_ delete
 199         // the associated image list when it's deleted in order to allow image
 200         // lists to be shared between different controls.
 201         //
 202         // The normal image list is for the icons which correspond to the
 203         // normal tree item state (whether it is selected or not).
 204         // Additionally, the application might choose to show a state icon
 205         // which corresponds to an app-defined item state (for example,
 206         // checked/unchecked) which are taken from the state image list.
 207     wxImageList *GetImageList() const;
 208     wxImageList *GetStateImageList() const;
 209
 210     void SetImageList(wxImageList *imageList);
 211     void SetStateImageList(wxImageList *imageList);
 212
 213     // Functions to work with tree ctrl items. Unfortunately, they can _not_ be
 214     // member functions of wxTreeItem because they must know the tree the item
 215     // belongs to for Windows implementation and storing the pointer to
 216     // wxTreeCtrl in each wxTreeItem is just too much waste.
 217
 218     // accessors
 219     // ---------
 220
 221         // retrieve items label
 222     wxString GetItemText(const wxTreeItemId& item) const;
 223         // get the normal item image
 224     int GetItemImage(const wxTreeItemId& item) const;
 225         // get the selected item image
 226     int GetItemSelectedImage(const wxTreeItemId& item) const;
 227         // get the data associated with the item
 228     wxTreeItemData *GetItemData(const wxTreeItemId& item) const;
 229
 230     // modifiers
 231     // ---------
 232
 233         // set items label
 234     void SetItemText(const wxTreeItemId& item, const wxString& text);
 235         // set the normal item image
 236     void SetItemImage(const wxTreeItemId& item, int image);
 237         // set the selected item image
 238     void SetItemSelectedImage(const wxTreeItemId& item, int image);
 239         // associate some data with the item
 240     void SetItemData(const wxTreeItemId& item, wxTreeItemData *data);
 241
 242         // force appearance of [+] button near the item. This is useful to
 243         // allow the user to expand the items which don't have any children now
 244         // - but instead add them only when needed, thus minimizing memory
 245         // usage and loading time.
 246     void SetItemHasChildren(const wxTreeItemId& item, bool has = TRUE);
 247
 248         // the item will be shown in bold
 249     void SetItemBold(const wxTreeItemId& item, bool bold = TRUE);
 250
 251         // the item will be shown with a drop highlight
 252     void SetItemDropHighlight(const wxTreeItemId& item, bool highlight = TRUE);
 253
 254     // item status inquiries
 255     // ---------------------
 256
 257         // is the item visible (it might be outside the view or not expanded)?
 258     bool IsVisible(const wxTreeItemId& item) const;
 259         // does the item has any children?
 260     bool ItemHasChildren(const wxTreeItemId& item) const;
 261         // is the item expanded (only makes sense if HasChildren())?
 262     bool IsExpanded(const wxTreeItemId& item) const;
 263         // is this item currently selected (the same as has focus)?
 264     bool IsSelected(const wxTreeItemId& item) const;
 265         // is item text in bold font?
 266     bool IsBold(const wxTreeItemId& item) const;
 267
 268     // number of children
 269     // ------------------
 270
 271         // if 'recursively' is FALSE, only immediate children count, otherwise
 272         // the returned number is the number of all items in this branch
 273     size_t GetChildrenCount(const wxTreeItemId& item, bool recursively = TRUE);
 274
 275     // navigation
 276     // ----------
 277
 278     // wxTreeItemId.IsOk() will return FALSE if there is no such item
 279
 280         // get the root tree item
 281     wxTreeItemId GetRootItem() const;
 282
 283         // get the item currently selected (may return NULL if no selection)
 284     wxTreeItemId GetSelection() const;
 285
 286         // get the parent of this item (may return NULL if root)
 287     wxTreeItemId GetParent(const wxTreeItemId& item) const;
 288
 289         // for this enumeration function you must pass in a "cookie" parameter
 290         // which is opaque for the application but is necessary for the library
 291         // to make these functions reentrant (i.e. allow more than one
 292         // enumeration on one and the same object simultaneously). Of course,
 293         // the "cookie" passed to GetFirstChild() and GetNextChild() should be
 294         // the same!
 295
 296         // get the first child of this item
 297     wxTreeItemId GetFirstChild(const wxTreeItemId& item, long& _cookie) const;
 298         // get the next child
 299     wxTreeItemId GetNextChild(const wxTreeItemId& item, long& _cookie) const;
 300         // get the last child of this item - this method doesn't use cookies
 301     wxTreeItemId GetLastChild(const wxTreeItemId& item) const;
 302
 303         // get the next sibling of this item
 304     wxTreeItemId GetNextSibling(const wxTreeItemId& item) const;
 305         // get the previous sibling
 306     wxTreeItemId GetPrevSibling(const wxTreeItemId& item) const;
 307
 308         // get first visible item
 309     wxTreeItemId GetFirstVisibleItem() const;
 310         // get the next visible item: item must be visible itself!
 311         // see IsVisible() and wxTreeCtrl::GetFirstVisibleItem()
 312     wxTreeItemId GetNextVisible(const wxTreeItemId& item) const;
 313         // get the previous visible item: item must be visible itself!
 314     wxTreeItemId GetPrevVisible(const wxTreeItemId& item) const;
 315
 316     // operations
 317     // ----------
 318
 319         // add the root node to the tree
 320     wxTreeItemId AddRoot(const wxString& text,
 321                          int image = -1, int selectedImage = -1,
 322                          wxTreeItemData *data = NULL);
 323
 324         // insert a new item in as the first child of the parent
 325     wxTreeItemId PrependItem(const wxTreeItemId& parent,
 326                              const wxString& text,
 327                              int image = -1, int selectedImage = -1,
 328                              wxTreeItemData *data = NULL);
 329
 330         // insert a new item after a given one
 331     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 332                             const wxTreeItemId& idPrevious,
 333                             const wxString& text,
 334                             int image = -1, int selectedImage = -1,
 335                             wxTreeItemData *data = NULL);
 336
 337         // insert a new item in as the last child of the parent
 338     wxTreeItemId AppendItem(const wxTreeItemId& parent,
 339                             const wxString& text,
 340                             int image = -1, int selectedImage = -1,
 341                             wxTreeItemData *data = NULL);
 342
 343         // delete this item and associated data if any
 344     void Delete(const wxTreeItemId& item);
 345         // delete all children (but don't delete the item itself)
 346         // NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
 347     void DeleteChildren(const wxTreeItemId& item);
 348         // delete all items from the tree
 349         // NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
 350     void DeleteAllItems();
 351
 352         // expand this item
 353     void Expand(const wxTreeItemId& item);
 354         // collapse the item without removing its children
 355     void Collapse(const wxTreeItemId& item);
 356         // collapse the item and remove all children
 357     void CollapseAndReset(const wxTreeItemId& item);
 358         // toggles the current state
 359     void Toggle(const wxTreeItemId& item);
 360
 361         // remove the selection from currently selected item (if any)
 362     void Unselect();
 363         // select this item
 364     void SelectItem(const wxTreeItemId& item);
 365         // make sure this item is visible (expanding the parent item and/or
 366         // scrolling to this item if necessary)
 367     void EnsureVisible(const wxTreeItemId& item);
 368         // scroll to this item (but don't expand its parent)
 369     void ScrollTo(const wxTreeItemId& item);
 370
 371         // start editing the item label: this (temporarily) replaces the item
 372         // with a one line edit control. The item will be selected if it hadn't
 373         // been before. textCtrlClass parameter allows you to create an edit
 374         // control of arbitrary user-defined class deriving from wxTextCtrl.
 375     wxTextCtrl* EditLabel(const wxTreeItemId& item,
 376                           wxClassInfo* textCtrlClass = CLASSINFO(wxTextCtrl));
 377         // returns the same pointer as StartEdit() if the item is being edited,
 378         // NULL otherwise (it's assumed that no more than one item may be
 379         // edited simultaneously)
 380     wxTextCtrl* GetEditControl() const;
 381         // end editing and accept or discard the changes to item label
 382     void EndEditLabel(const wxTreeItemId& item, bool discardChanges = FALSE);
 383
 384     // sorting
 385         // this function is called to compare 2 items and should return -1, 0
 386         // or +1 if the first item is less than, equal to or greater than the
 387         // second one. The base class version performs alphabetic comparaison
 388         // of item labels (GetText)
 389     virtual int OnCompareItems(const wxTreeItemId& item1,
 390                                const wxTreeItemId& item2);
 391         // sort the children of this item using OnCompareItems
 392         //
 393         // NB: this function is not reentrant and not MT-safe (FIXME)!
 394     void SortChildren(const wxTreeItemId& item);
 395
 396     // helpers
 397     // -------
 398
 399         // determine to which item (if any) belongs the given point (the
 400         // coordinates specified are relative to the client area of tree ctrl)
 401         // and fill the flags parameter with a bitmask of wxTREE_HITTEST_xxx
 402         // constants.
 403         //
 404         // The first function is more portable (because easier to implement
 405         // on other platforms), but the second one returns some extra info.
 406     wxTreeItemId HitTest(const wxPoint& point)
 407         { int dummy; return HitTest(point, dummy); }
 408     wxTreeItemId HitTest(const wxPoint& point, int& flags);
 409
 410         // get the bounding rectangle of the item (or of its label only)
 411     bool GetBoundingRect(const wxTreeItemId& item,
 412                          wxRect& rect,
 413                          bool textOnly = FALSE) const;
 414
 415     // deprecated
 416     // ----------
 417
 418     // these methods are deprecated and will be removed in future versions of
 419     // wxWindows, they're here for compatibility only, don't use them in new
 420     // code (the comments indicate why these methods are now useless and how to
 421     // replace them)
 422
 423         // use Expand, Collapse, CollapseAndReset or Toggle
 424     void ExpandItem(const wxTreeItemId& item, int action);
 425
 426         // use AddRoot, PrependItem or AppendItem
 427     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 428                             const wxString& text,
 429                             int image = -1, int selImage = -1,
 430                             long insertAfter = wxTREE_INSERT_LAST);
 431
 432         // use Set/GetImageList and Set/GetStateImageList
 433     wxImageList *GetImageList(int) const
 434         { return GetImageList(); }
 435     void SetImageList(wxImageList *imageList, int)
 436         { SetImageList(imageList); }
 437
 438     // implementation
 439     // --------------
 440     virtual bool MSWCommand(WXUINT param, WXWORD id);
 441     virtual bool MSWOnNotify(int idCtrl, WXLPARAM lParam, WXLPARAM *result);
 442
 443 protected:
 444     // SetImageList helper
 445     void SetAnyImageList(wxImageList *imageList, int which);
 446
 447     wxTextCtrl*  m_textCtrl;        // used while editing the item label
 448     wxImageList *m_imageListNormal, // images for tree elements
 449                 *m_imageListState;  // special images for app defined states
 450
 451 private:
 452     // the common part of all ctors
 453     void Init();
 454
 455     // helper functions
 456     inline bool DoGetItem(wxTreeViewItem *tvItem) const;
 457     inline void DoSetItem(wxTreeViewItem *tvItem);
 458
 459     inline void DoExpand(const wxTreeItemId& item, int flag);
 460
 461     wxTreeItemId DoInsertItem(const wxTreeItemId& parent,
 462                               wxTreeItemId hInsertAfter,
 463                               const wxString& text,
 464                               int image, int selectedImage,
 465                               wxTreeItemData *data);
 466
 467     void DeleteTextCtrl();
 468
 469     DECLARE_DYNAMIC_CLASS(wxTreeCtrl)
 470 };
 471
 472 // ----------------------------------------------------------------------------
 473 // wxTreeEvent is a special class for all events associated with tree controls
 474 //
 475 // NB: note that not all accessors make sense for all events, see the event
 476 //     descriptions below
 477 // ----------------------------------------------------------------------------
 478 class WXDLLEXPORT wxTreeEvent : public wxNotifyEvent
 479 {
 480 friend wxTreeCtrl;
 481 public:
 482     wxTreeEvent(wxEventType commandType = wxEVT_NULL, int id = 0);
 483
 484     // accessors
 485         // get the item on which the operation was performed or the newly
 486         // selected item for wxEVT_COMMAND_TREE_SEL_CHANGED/ING events
 487     wxTreeItemId GetItem() const { return m_item; }
 488
 489         // for wxEVT_COMMAND_TREE_SEL_CHANGED/ING events, get the previously
 490         // selected item
 491     wxTreeItemId GetOldItem() const { return m_itemOld; }
 492
 493         // the point where the mouse was when the drag operation started (for
 494         // wxEVT_COMMAND_TREE_BEGIN_(R)DRAG events only)
 495     wxPoint GetPoint() const { return m_pointDrag; }
 496
 497         // keyboard code (for wxEVT_COMMAND_TREE_KEY_DOWN only)
 498     int GetCode() const { return m_code; }
 499
 500 private:
 501     // @@ we could save some space by using union here
 502     int           m_code;
 503     wxTreeItemId  m_item,
 504                   m_itemOld;
 505     wxPoint       m_pointDrag;
 506
 507     DECLARE_DYNAMIC_CLASS(wxTreeEvent)
 508 };
 509
 510 typedef void (wxEvtHandler::*wxTreeEventFunction)(wxTreeEvent&);
 511
 512 // ----------------------------------------------------------------------------
 513 // macros for handling tree control events
 514 // ----------------------------------------------------------------------------
 515
 516 // GetItem() returns the item being dragged, GetPoint() the mouse coords
 517 #define EVT_TREE_BEGIN_DRAG(id, fn) { wxEVT_COMMAND_TREE_BEGIN_DRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 518 #define EVT_TREE_BEGIN_RDRAG(id, fn) { wxEVT_COMMAND_TREE_BEGIN_RDRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 519
 520 // GetItem() returns the itme whose label is being edited
 521 #define EVT_TREE_BEGIN_LABEL_EDIT(id, fn) { wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 522 #define EVT_TREE_END_LABEL_EDIT(id, fn) { wxEVT_COMMAND_TREE_END_LABEL_EDIT, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 523
 524 // provide/update information about GetItem() item
 525 #define EVT_TREE_GET_INFO(id, fn) { wxEVT_COMMAND_TREE_GET_INFO, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 526 #define EVT_TREE_SET_INFO(id, fn) { wxEVT_COMMAND_TREE_SET_INFO, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 527
 528 // GetItem() is the item being expanded/collapsed, the "ING" versions can use
 529 #define EVT_TREE_ITEM_EXPANDED(id, fn) { wxEVT_COMMAND_TREE_ITEM_EXPANDED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 530 #define EVT_TREE_ITEM_EXPANDING(id, fn) { wxEVT_COMMAND_TREE_ITEM_EXPANDING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 531 #define EVT_TREE_ITEM_COLLAPSED(id, fn) { wxEVT_COMMAND_TREE_ITEM_COLLAPSED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 532 #define EVT_TREE_ITEM_COLLAPSING(id, fn) { wxEVT_COMMAND_TREE_ITEM_COLLAPSING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 533
 534 // GetOldItem() is the item which had the selection previously, GetItem() is
 535 // the item which acquires selection
 536 #define EVT_TREE_SEL_CHANGED(id, fn) { wxEVT_COMMAND_TREE_SEL_CHANGED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 537 #define EVT_TREE_SEL_CHANGING(id, fn) { wxEVT_COMMAND_TREE_SEL_CHANGING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 538
 539 // GetCode() returns the key code
 540 // NB: this is the only message for which GetItem() is invalid (you may get the
 541 //     item from GetSelection())
 542 #define EVT_TREE_KEY_DOWN(id, fn) { wxEVT_COMMAND_TREE_KEY_DOWN, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 543
 544 // GetItem() returns the item being deleted, the associated data (if any) will
 545 // be deleted just after the return of this event handler (if any)
 546 #define EVT_TREE_DELETE_ITEM(id, fn) { wxEVT_COMMAND_TREE_DELETE_ITEM, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 547
 548 // GetItem() returns the item that was activated (double click, enter, space)
 549 #define EVT_TREE_ITEM_ACTIVATED(id, fn) { wxEVT_COMMAND_TREE_ITEM_ACTIVATED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 550
 551 #endif
 552     // _WX_TREECTRL_H_