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
  25 // the type for "untyped" data
  26 typedef long wxDataType;
  27
  28 // fwd decl
  29 class  WXDLLEXPORT wxImageList;
  30 struct WXDLLEXPORT wxTreeViewItem;
  31
  32 // a callback function used for sorting tree items, it should return -1 if the
  33 // first item precedes the second, +1 if the second precedes the first or 0 if
  34 // they're equivalent
  35 class wxTreeItemData;
  36 typedef int (*wxTreeItemCmpFunc)(wxTreeItemData *item1, wxTreeItemData *item2);
  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 //    wxTreeItemId(long itemId) { m_itemId = itemId; }
 116
 117 protected:
 118     long m_itemId;
 119 };
 120
 121 // ----------------------------------------------------------------------------
 122 // wxTreeItemData is some (arbitrary) user class associated with some item. The
 123 // main advantage of having this class (compared to old untyped interface) is
 124 // that wxTreeItemData's are destroyed automatically by the tree and, as this
 125 // class has virtual dtor, it means that the memory will be automatically
 126 // freed. OTOH, we don't just use wxObject instead of wxTreeItemData because
 127 // the size of this class is critical: in any real application, each tree leaf
 128 // will have wxTreeItemData associated with it and number of leaves may be
 129 // quite big.
 130 //
 131 // Because the objects of this class are deleted by the tree, they should
 132 // always be allocated on the heap!
 133 // ----------------------------------------------------------------------------
 134 class WXDLLEXPORT wxTreeItemData : private wxTreeItemId
 135 {
 136 public:
 137     // default ctor/copy ctor/assignment operator are ok
 138
 139     // dtor is virtual and all the items are deleted by the tree control when
 140     // it's deleted, so you normally don't have to care about freeing memory
 141     // allocated in your wxTreeItemData-derived class
 142     virtual ~wxTreeItemData() { }
 143
 144     // accessors: set/get the item associated with this node
 145     void SetId(const wxTreeItemId& id) { m_itemId = id; }
 146     const wxTreeItemId& GetId() const { return (wxTreeItemId&) m_itemId; }
 147 };
 148
 149 // ----------------------------------------------------------------------------
 150 // wxTreeCtrl
 151 // ----------------------------------------------------------------------------
 152 class WXDLLEXPORT wxTreeCtrl : public wxControl
 153 {
 154 public:
 155     // creation
 156     // --------
 157     wxTreeCtrl() { Init(); }
 158
 159     wxTreeCtrl(wxWindow *parent, wxWindowID id = -1,
 160                const wxPoint& pos = wxDefaultPosition,
 161                const wxSize& size = wxDefaultSize,
 162                long style = wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT,
 163                const wxValidator& validator = wxDefaultValidator,
 164                const wxString& name = "wxTreeCtrl")
 165     {
 166         Create(parent, id, pos, size, style, validator, name);
 167     }
 168
 169     virtual ~wxTreeCtrl();
 170
 171     bool Create(wxWindow *parent, wxWindowID id = -1,
 172                 const wxPoint& pos = wxDefaultPosition,
 173                 const wxSize& size = wxDefaultSize,
 174                 long style = wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT,
 175                 const wxValidator& validator = wxDefaultValidator,
 176                 const wxString& name = "wxTreeCtrl");
 177
 178     // accessors
 179     // ---------
 180
 181         // get the total number of items in the control
 182     size_t GetCount() const;
 183
 184         // indent is the number of pixels the children are indented relative to
 185         // the parents position. SetIndent() also redraws the control
 186         // immediately.
 187     unsigned int GetIndent() const;
 188     void SetIndent(unsigned int indent);
 189
 190         // image list: these functions allow to associate an image list with
 191         // the control and retrieve it. Note that the control does _not_ delete
 192         // the associated image list when it's deleted in order to allow image
 193         // lists to be shared between different controls.
 194         //
 195         // The normal image list is for the icons which correspond to the
 196         // normal tree item state (whether it is selected or not).
 197         // Additionally, the application might choose to show a state icon
 198         // which corresponds to an app-defined item state (for example,
 199         // checked/unchecked) which are taken from the state image list.
 200     wxImageList *GetImageList() const;
 201     wxImageList *GetStateImageList() const;
 202
 203     void SetImageList(wxImageList *imageList);
 204     void SetStateImageList(wxImageList *imageList);
 205
 206     // Functions to work with tree ctrl items. Unfortunately, they can _not_ be
 207     // member functions of wxTreeItem because they must know the tree the item
 208     // belongs to for Windows implementation and storing the pointer to
 209     // wxTreeCtrl in each wxTreeItem is just too much waste.
 210
 211     // accessors
 212     // ---------
 213
 214         // retrieve items label
 215     wxString GetItemText(const wxTreeItemId& item) const;
 216         // get the normal item image
 217     int GetItemImage(const wxTreeItemId& item) const;
 218         // get the selected item image
 219     int GetItemSelectedImage(const wxTreeItemId& item) const;
 220         // get the data associated with the item
 221     wxTreeItemData *GetItemData(const wxTreeItemId& item) const;
 222
 223     // modifiers
 224     // ---------
 225
 226         // set items label
 227     void SetItemText(const wxTreeItemId& item, const wxString& text);
 228         // set the normal item image
 229     void SetItemImage(const wxTreeItemId& item, int image);
 230         // set the selected item image
 231     void SetItemSelectedImage(const wxTreeItemId& item, int image);
 232         // associate some data with the item
 233     void SetItemData(const wxTreeItemId& item, wxTreeItemData *data);
 234
 235         // force appearance of [+] button near the item. This is useful to
 236         // allow the user to expand the items which don't have any children now
 237         // - but instead add them only when needed, thus minimizing memory
 238         // usage and loading time.
 239     void SetItemHasChildren(const wxTreeItemId& item, bool has = TRUE);
 240
 241     // item status inquiries
 242     // ---------------------
 243
 244         // is the item visible (it might be outside the view or not expanded)?
 245     bool IsVisible(const wxTreeItemId& item) const;
 246         // does the item has any children?
 247     bool ItemHasChildren(const wxTreeItemId& item) const;
 248         // is the item expanded (only makes sense if HasChildren())?
 249     bool IsExpanded(const wxTreeItemId& item) const;
 250         // is this item currently selected (the same as has focus)?
 251     bool IsSelected(const wxTreeItemId& item) const;
 252
 253     // number of children
 254     // ------------------
 255
 256         // if 'recursively' is FALSE, only immediate children count, otherwise
 257         // the returned number is the number of all items in this branch
 258     size_t GetChildrenCount(const wxTreeItemId& item, bool recursively = TRUE);
 259
 260     // navigation
 261     // ----------
 262
 263     // wxTreeItemId.IsOk() will return FALSE if there is no such item
 264
 265         // get the root tree item
 266     wxTreeItemId GetRootItem() const;
 267
 268         // get the item currently selected (may return NULL if no selection)
 269     wxTreeItemId GetSelection() const;
 270
 271         // get the parent of this item (may return NULL if root)
 272     wxTreeItemId GetParent(const wxTreeItemId& item) const;
 273
 274         // for this enumeration function you must pass in a "cookie" parameter
 275         // which is opaque for the application but is necessary for the library
 276         // to make these functions reentrant (i.e. allow more than one
 277         // enumeration on one and the same object simultaneously). Of course,
 278         // the "cookie" passed to GetFirstChild() and GetNextChild() should be
 279         // the same!
 280
 281         // get the first child of this item
 282     wxTreeItemId GetFirstChild(const wxTreeItemId& item, long& _cookie) const;
 283         // get the next child
 284     wxTreeItemId GetNextChild(const wxTreeItemId& item, long& _cookie) const;
 285
 286         // get the next sibling of this item
 287     wxTreeItemId GetNextSibling(const wxTreeItemId& item) const;
 288         // get the previous sibling
 289     wxTreeItemId GetPrevSibling(const wxTreeItemId& item) const;
 290
 291         // get first visible item
 292     wxTreeItemId GetFirstVisibleItem() const;
 293         // get the next visible item: item must be visible itself!
 294         // see IsVisible() and wxTreeCtrl::GetFirstVisibleItem()
 295     wxTreeItemId GetNextVisible(const wxTreeItemId& item) const;
 296         // get the previous visible item: item must be visible itself!
 297     wxTreeItemId GetPrevVisible(const wxTreeItemId& item) const;
 298
 299     // operations
 300     // ----------
 301
 302         // add the root node to the tree
 303     wxTreeItemId AddRoot(const wxString& text,
 304                          int image = -1, int selectedImage = -1,
 305                          wxTreeItemData *data = NULL);
 306
 307         // insert a new item in as the first child of the parent
 308     wxTreeItemId PrependItem(const wxTreeItemId& parent,
 309                              const wxString& text,
 310                              int image = -1, int selectedImage = -1,
 311                              wxTreeItemData *data = NULL);
 312
 313         // insert a new item after a given one
 314     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 315                             const wxTreeItemId& idPrevious,
 316                             const wxString& text,
 317                             int image = -1, int selectedImage = -1,
 318                             wxTreeItemData *data = NULL);
 319
 320         // insert a new item in as the last child of the parent
 321     wxTreeItemId AppendItem(const wxTreeItemId& parent,
 322                             const wxString& text,
 323                             int image = -1, int selectedImage = -1,
 324                             wxTreeItemData *data = NULL);
 325
 326         // delete this item and associated data if any
 327     void Delete(const wxTreeItemId& item);
 328         // delete all items from the tree
 329     void DeleteAllItems();
 330
 331         // expand this item
 332     void Expand(const wxTreeItemId& item);
 333         // collapse the item without removing its children
 334     void Collapse(const wxTreeItemId& item);
 335         // collapse the item and remove all children
 336     void CollapseAndReset(const wxTreeItemId& item);
 337         // toggles the current state
 338     void Toggle(const wxTreeItemId& item);
 339
 340         // remove the selection from currently selected item (if any)
 341     void Unselect();
 342         // select this item
 343     void SelectItem(const wxTreeItemId& item);
 344         // make sure this item is visible (expanding the parent item and/or
 345         // scrolling to this item if necessary)
 346     void EnsureVisible(const wxTreeItemId& item);
 347         // scroll to this item (but don't expand its parent)
 348     void ScrollTo(const wxTreeItemId& item);
 349
 350         // start editing the item label: this (temporarily) replaces the item
 351         // with a one line edit control. The item will be selected if it hadn't
 352         // been before. textCtrlClass parameter allows you to create an edit
 353         // control of arbitrary user-defined class deriving from wxTextCtrl.
 354     wxTextCtrl* EditLabel(const wxTreeItemId& item,
 355                           wxClassInfo* textCtrlClass = CLASSINFO(wxTextCtrl));
 356         // returns the same pointer as StartEdit() if the item is being edited,
 357         // NULL otherwise (it's assumed that no more than one item may be
 358         // edited simultaneously)
 359     wxTextCtrl* GetEditControl() const;
 360         // end editing and accept or discard the changes to item label
 361     void EndEditLabel(const wxTreeItemId& item, bool discardChanges = FALSE);
 362
 363         // sort the children of this item using the specified callback function
 364         // (it should return -1, 0 or +1 as usual), if it's not specified
 365         // alphabetical comparaison is performed.
 366         //
 367         // NB: this function is not reentrant!
 368     void SortChildren(const wxTreeItemId& item,
 369                       wxTreeItemCmpFunc *cmpFunction = NULL);
 370
 371     // helpers
 372     // -------
 373
 374     // @@@ do we really need to expose these functions to the application?
 375
 376         // get the bounding rectangle of the item (or of its label only)
 377     void GetBoundingRect(const wxTreeItemId& item,
 378                          wxRectangle& rect,
 379                          bool textOnly = FALSE) const;
 380
 381         // determine to which item (if any) belongs the given point (the
 382         // coordinates specified are relative to the client area of tree ctrl)
 383         // and fill the flags parameter with a bitmask of wxTREE_HITTEST_xxx
 384         // constants
 385     wxTreeItemId HitTest(const wxPoint& point, int& flags);
 386
 387     // deprecated
 388     // ----------
 389
 390     // these methods are deprecated and will be removed in future versions of
 391     // wxWindows, they're here for compatibility only, don't use them in new
 392     // code (the comments indicate why these methods are now useless and how to
 393     // replace them)
 394
 395         // use Expand, Collapse, CollapseAndReset or Toggle
 396     void ExpandItem(const wxTreeItemId& item, int action);
 397
 398         // use AddRoot, PrependItem or AppendItem
 399     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 400                             const wxString& text,
 401                             int image = -1, int selImage = -1,
 402                             long insertAfter = wxTREE_INSERT_LAST);
 403
 404         // use Set/GetImageList and Set/GetStateImageList
 405     wxImageList *GetImageList(int) const
 406         { return GetImageList(); }
 407     void SetImageList(wxImageList *imageList, int)
 408         { SetImageList(imageList); }
 409
 410     // implementation
 411     // --------------
 412     void Command(wxCommandEvent& event) { ProcessCommand(event); };
 413     bool MSWCommand(WXUINT param, WXWORD id);
 414     bool MSWNotify(WXWPARAM wParam, WXLPARAM lParam);
 415
 416 protected:
 417     // SetImageList helper
 418     void SetAnyImageList(wxImageList *imageList, int which);
 419
 420     wxTextCtrl*  m_textCtrl;        // used while editing the item label
 421     wxImageList *m_imageListNormal, // images for tree elements
 422                 *m_imageListState;  // special images for app defined states
 423
 424 private:
 425     // the common part of all ctors
 426     void Init();
 427
 428     // helper functions
 429     inline bool DoGetItem(wxTreeViewItem *tvItem) const;
 430     inline void DoSetItem(wxTreeViewItem *tvItem);
 431
 432     inline void DoExpand(const wxTreeItemId& item, int flag);
 433
 434     wxTreeItemId DoInsertItem(const wxTreeItemId& parent,
 435                               wxTreeItemId hInsertAfter,
 436                               const wxString& text,
 437                               int image, int selectedImage,
 438                               wxTreeItemData *data);
 439
 440     void DeleteTextCtrl();
 441
 442     DECLARE_DYNAMIC_CLASS(wxTreeCtrl)
 443 };
 444
 445 // ----------------------------------------------------------------------------
 446 // wxTreeEvent is a special class for all events associated with tree controls
 447 //
 448 // NB: note that not all accessors make sense for all events, see the event
 449 //     descriptions below
 450 // ----------------------------------------------------------------------------
 451 class WXDLLEXPORT wxTreeEvent : public wxCommandEvent
 452 {
 453 friend wxTreeCtrl;
 454 public:
 455     wxTreeEvent(wxEventType commandType = wxEVT_NULL, int id = 0);
 456
 457     // accessors
 458         // get the item on which the operation was performed or the newly
 459         // selected item for wxEVT_COMMAND_TREE_SEL_CHANGED/ING events
 460     wxTreeItemId GetItem() const { return m_item; }
 461
 462         // for wxEVT_COMMAND_TREE_SEL_CHANGED/ING events, get the previously
 463         // selected item
 464     wxTreeItemId GetOldItem() const { return m_itemOld; }
 465
 466         // the point where the mouse was when the drag operation started (for
 467         // wxEVT_COMMAND_TREE_BEGIN_(R)DRAG events only)
 468     wxPoint GetPoint() const { return m_pointDrag; }
 469
 470         // keyboard code (for wxEVT_COMMAND_TREE_KEY_DOWN only)
 471     int GetCode() const { return m_code; }
 472
 473     // set return code for wxEVT_COMMAND_TREE_ITEM_{EXPAND|COLLAPS}ING events
 474         // call this to forbid the change in item status
 475     void Veto() { m_code = TRUE; }
 476
 477 private:
 478     // @@ we could save some space by using union here
 479     int           m_code;
 480     wxTreeItemId  m_item,
 481                   m_itemOld;
 482     wxPoint       m_pointDrag;
 483
 484     DECLARE_DYNAMIC_CLASS(wxTreeEvent)
 485 };
 486
 487 typedef void (wxEvtHandler::*wxTreeEventFunction)(wxTreeEvent&);
 488
 489 // ----------------------------------------------------------------------------
 490 // macros for handling tree control events
 491 // ----------------------------------------------------------------------------
 492
 493 // GetItem() returns the item being dragged, GetPoint() the mouse coords
 494 #define EVT_TREE_BEGIN_DRAG(id, fn) { wxEVT_COMMAND_TREE_BEGIN_DRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 495 #define EVT_TREE_BEGIN_RDRAG(id, fn) { wxEVT_COMMAND_TREE_BEGIN_RDRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 496
 497 // GetItem() returns the itme whose label is being edited
 498 #define EVT_TREE_BEGIN_LABEL_EDIT(id, fn) { wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 499 #define EVT_TREE_END_LABEL_EDIT(id, fn) { wxEVT_COMMAND_TREE_END_LABEL_EDIT, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 500
 501 // provide/update information about GetItem() item
 502 #define EVT_TREE_GET_INFO(id, fn) { wxEVT_COMMAND_TREE_GET_INFO, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 503 #define EVT_TREE_SET_INFO(id, fn) { wxEVT_COMMAND_TREE_SET_INFO, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 504
 505 // GetItem() is the item being expanded/collapsed, the "ING" versions can use
 506 #define EVT_TREE_ITEM_EXPANDED(id, fn) { wxEVT_COMMAND_TREE_ITEM_EXPANDED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 507 #define EVT_TREE_ITEM_EXPANDING(id, fn) { wxEVT_COMMAND_TREE_ITEM_EXPANDING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 508 #define EVT_TREE_ITEM_COLLAPSED(id, fn) { wxEVT_COMMAND_TREE_ITEM_COLLAPSED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 509 #define EVT_TREE_ITEM_COLLAPSING(id, fn) { wxEVT_COMMAND_TREE_ITEM_COLLAPSING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 510
 511 // GetOldItem() is the item which had the selection previously, GetItem() is
 512 // the item which acquires selection
 513 #define EVT_TREE_SEL_CHANGED(id, fn) { wxEVT_COMMAND_TREE_SEL_CHANGED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 514 #define EVT_TREE_SEL_CHANGING(id, fn) { wxEVT_COMMAND_TREE_SEL_CHANGING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 515
 516 // GetCode() returns the key code
 517 // NB: this is the only message for which GetItem() is invalid (you may get the
 518 //     item from GetSelection())
 519 #define EVT_TREE_KEY_DOWN(id, fn) { wxEVT_COMMAND_TREE_KEY_DOWN, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 520
 521 // GetItem() returns the item being deleted, the associated data (if any) will
 522 // be deleted just after the return of this event handler (if any)
 523 #define EVT_TREE_DELETE_ITEM(id, fn) { wxEVT_COMMAND_TREE_DELETE_ITEM, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 524
 525 #endif
 526     // _WX_TREECTRL_H_