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 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     const wxTreeItemId& GetId() const { return (wxTreeItemId&) m_itemId; }
 145 };
 146
 147 // ----------------------------------------------------------------------------
 148 // wxTreeCtrl
 149 // ----------------------------------------------------------------------------
 150 class WXDLLEXPORT wxTreeCtrl : public wxControl
 151 {
 152 public:
 153     // creation
 154     // --------
 155     wxTreeCtrl() { Init(); }
 156
 157     wxTreeCtrl(wxWindow *parent, wxWindowID id = -1,
 158                const wxPoint& pos = wxDefaultPosition,
 159                const wxSize& size = wxDefaultSize,
 160                long style = wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT,
 161                const wxValidator& validator = wxDefaultValidator,
 162                const wxString& name = "wxTreeCtrl")
 163     {
 164         Create(parent, id, pos, size, style, validator, name);
 165     }
 166
 167     virtual ~wxTreeCtrl();
 168
 169     bool Create(wxWindow *parent, wxWindowID id = -1,
 170                 const wxPoint& pos = wxDefaultPosition,
 171                 const wxSize& size = wxDefaultSize,
 172                 long style = wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT,
 173                 const wxValidator& validator = wxDefaultValidator,
 174                 const wxString& name = "wxTreeCtrl");
 175
 176     // accessors
 177     // ---------
 178
 179         // get the total number of items in the control
 180     size_t GetCount() const;
 181
 182         // indent is the number of pixels the children are indented relative to
 183         // the parents position. SetIndent() also redraws the control
 184         // immediately.
 185     unsigned int GetIndent() const;
 186     void SetIndent(unsigned int indent);
 187
 188         // image list: these functions allow to associate an image list with
 189         // the control and retrieve it. Note that the control does _not_ delete
 190         // the associated image list when it's deleted in order to allow image
 191         // lists to be shared between different controls.
 192         //
 193         // The normal image list is for the icons which correspond to the
 194         // normal tree item state (whether it is selected or not).
 195         // Additionally, the application might choose to show a state icon
 196         // which corresponds to an app-defined item state (for example,
 197         // checked/unchecked) which are taken from the state image list.
 198     wxImageList *GetImageList() const;
 199     wxImageList *GetStateImageList() const;
 200
 201     void SetImageList(wxImageList *imageList);
 202     void SetStateImageList(wxImageList *imageList);
 203
 204     // Functions to work with tree ctrl items. Unfortunately, they can _not_ be
 205     // member functions of wxTreeItem because they must know the tree the item
 206     // belongs to for Windows implementation and storing the pointer to
 207     // wxTreeCtrl in each wxTreeItem is just too much waste.
 208
 209     // accessors
 210     // ---------
 211
 212         // retrieve items label
 213     wxString GetItemText(const wxTreeItemId& item) const;
 214         // get the normal item image
 215     int GetItemImage(const wxTreeItemId& item) const;
 216         // get the selected item image
 217     int GetItemSelectedImage(const wxTreeItemId& item) const;
 218         // get the data associated with the item
 219     wxTreeItemData *GetItemData(const wxTreeItemId& item) const;
 220
 221     // modifiers
 222     // ---------
 223
 224         // set items label
 225     void SetItemText(const wxTreeItemId& item, const wxString& text);
 226         // set the normal item image
 227     void SetItemImage(const wxTreeItemId& item, int image);
 228         // set the selected item image
 229     void SetItemSelectedImage(const wxTreeItemId& item, int image);
 230         // associate some data with the item
 231     void SetItemData(const wxTreeItemId& item, wxTreeItemData *data);
 232
 233         // force appearance of [+] button near the item. This is useful to
 234         // allow the user to expand the items which don't have any children now
 235         // - but instead add them only when needed, thus minimizing memory
 236         // usage and loading time.
 237     void SetItemHasChildren(const wxTreeItemId& item, bool has = TRUE);
 238
 239         // the item will be shown in bold
 240     void SetItemBold(const wxTreeItemId& item, bool bold = TRUE);
 241
 242     // item status inquiries
 243     // ---------------------
 244
 245         // is the item visible (it might be outside the view or not expanded)?
 246     bool IsVisible(const wxTreeItemId& item) const;
 247         // does the item has any children?
 248     bool ItemHasChildren(const wxTreeItemId& item) const;
 249         // is the item expanded (only makes sense if HasChildren())?
 250     bool IsExpanded(const wxTreeItemId& item) const;
 251         // is this item currently selected (the same as has focus)?
 252     bool IsSelected(const wxTreeItemId& item) const;
 253         // is item text in bold font?
 254     bool IsBold(const wxTreeItemId& item) const;
 255
 256     // number of children
 257     // ------------------
 258
 259         // if 'recursively' is FALSE, only immediate children count, otherwise
 260         // the returned number is the number of all items in this branch
 261     size_t GetChildrenCount(const wxTreeItemId& item, bool recursively = TRUE);
 262
 263     // navigation
 264     // ----------
 265
 266     // wxTreeItemId.IsOk() will return FALSE if there is no such item
 267
 268         // get the root tree item
 269     wxTreeItemId GetRootItem() const;
 270
 271         // get the item currently selected (may return NULL if no selection)
 272     wxTreeItemId GetSelection() const;
 273
 274         // get the parent of this item (may return NULL if root)
 275     wxTreeItemId GetParent(const wxTreeItemId& item) const;
 276
 277         // for this enumeration function you must pass in a "cookie" parameter
 278         // which is opaque for the application but is necessary for the library
 279         // to make these functions reentrant (i.e. allow more than one
 280         // enumeration on one and the same object simultaneously). Of course,
 281         // the "cookie" passed to GetFirstChild() and GetNextChild() should be
 282         // the same!
 283
 284         // get the first child of this item
 285     wxTreeItemId GetFirstChild(const wxTreeItemId& item, long& _cookie) const;
 286         // get the next child
 287     wxTreeItemId GetNextChild(const wxTreeItemId& item, long& _cookie) const;
 288
 289         // get the next sibling of this item
 290     wxTreeItemId GetNextSibling(const wxTreeItemId& item) const;
 291         // get the previous sibling
 292     wxTreeItemId GetPrevSibling(const wxTreeItemId& item) const;
 293
 294         // get first visible item
 295     wxTreeItemId GetFirstVisibleItem() const;
 296         // get the next visible item: item must be visible itself!
 297         // see IsVisible() and wxTreeCtrl::GetFirstVisibleItem()
 298     wxTreeItemId GetNextVisible(const wxTreeItemId& item) const;
 299         // get the previous visible item: item must be visible itself!
 300     wxTreeItemId GetPrevVisible(const wxTreeItemId& item) const;
 301
 302     // operations
 303     // ----------
 304
 305         // add the root node to the tree
 306     wxTreeItemId AddRoot(const wxString& text,
 307                          int image = -1, int selectedImage = -1,
 308                          wxTreeItemData *data = NULL);
 309
 310         // insert a new item in as the first child of the parent
 311     wxTreeItemId PrependItem(const wxTreeItemId& parent,
 312                              const wxString& text,
 313                              int image = -1, int selectedImage = -1,
 314                              wxTreeItemData *data = NULL);
 315
 316         // insert a new item after a given one
 317     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 318                             const wxTreeItemId& idPrevious,
 319                             const wxString& text,
 320                             int image = -1, int selectedImage = -1,
 321                             wxTreeItemData *data = NULL);
 322
 323         // insert a new item in as the last child of the parent
 324     wxTreeItemId AppendItem(const wxTreeItemId& parent,
 325                             const wxString& text,
 326                             int image = -1, int selectedImage = -1,
 327                             wxTreeItemData *data = NULL);
 328
 329         // delete this item and associated data if any
 330     void Delete(const wxTreeItemId& item);
 331         // delete all items from the tree
 332     void DeleteAllItems();
 333
 334         // expand this item
 335     void Expand(const wxTreeItemId& item);
 336         // collapse the item without removing its children
 337     void Collapse(const wxTreeItemId& item);
 338         // collapse the item and remove all children
 339     void CollapseAndReset(const wxTreeItemId& item);
 340         // toggles the current state
 341     void Toggle(const wxTreeItemId& item);
 342
 343         // remove the selection from currently selected item (if any)
 344     void Unselect();
 345         // select this item
 346     void SelectItem(const wxTreeItemId& item);
 347         // make sure this item is visible (expanding the parent item and/or
 348         // scrolling to this item if necessary)
 349     void EnsureVisible(const wxTreeItemId& item);
 350         // scroll to this item (but don't expand its parent)
 351     void ScrollTo(const wxTreeItemId& item);
 352
 353         // start editing the item label: this (temporarily) replaces the item
 354         // with a one line edit control. The item will be selected if it hadn't
 355         // been before. textCtrlClass parameter allows you to create an edit
 356         // control of arbitrary user-defined class deriving from wxTextCtrl.
 357     wxTextCtrl* EditLabel(const wxTreeItemId& item,
 358                           wxClassInfo* textCtrlClass = CLASSINFO(wxTextCtrl));
 359         // returns the same pointer as StartEdit() if the item is being edited,
 360         // NULL otherwise (it's assumed that no more than one item may be
 361         // edited simultaneously)
 362     wxTextCtrl* GetEditControl() const;
 363         // end editing and accept or discard the changes to item label
 364     void EndEditLabel(const wxTreeItemId& item, bool discardChanges = FALSE);
 365
 366         // sort the children of this item using the specified callback function
 367         // (it should return -1, 0 or +1 as usual), if it's not specified
 368         // alphabetical comparaison is performed.
 369         //
 370         // NB: this function is not reentrant!
 371     void SortChildren(const wxTreeItemId& item,
 372                       wxTreeItemCmpFunc *cmpFunction = NULL);
 373
 374     // helpers
 375     // -------
 376
 377         // determine to which item (if any) belongs the given point (the
 378         // coordinates specified are relative to the client area of tree ctrl)
 379         // and fill the flags parameter with a bitmask of wxTREE_HITTEST_xxx
 380         // constants.
 381         //
 382         // The first function is more portable (because easier to implement
 383         // on other platforms), but the second one returns some extra info.
 384     wxTreeItemId HitTest(const wxPoint& point)
 385         { int dummy; return HitTest(point, dummy); }
 386     wxTreeItemId HitTest(const wxPoint& point, int& flags);
 387
 388         // get the bounding rectangle of the item (or of its label only)
 389         // @@@ do we really need to expose this functions to the application?
 390     void GetBoundingRect(const wxTreeItemId& item,
 391                          wxRectangle& rect,
 392                          bool textOnly = FALSE) const;
 393
 394     // deprecated
 395     // ----------
 396
 397     // these methods are deprecated and will be removed in future versions of
 398     // wxWindows, they're here for compatibility only, don't use them in new
 399     // code (the comments indicate why these methods are now useless and how to
 400     // replace them)
 401
 402         // use Expand, Collapse, CollapseAndReset or Toggle
 403     void ExpandItem(const wxTreeItemId& item, int action);
 404
 405         // use AddRoot, PrependItem or AppendItem
 406     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 407                             const wxString& text,
 408                             int image = -1, int selImage = -1,
 409                             long insertAfter = wxTREE_INSERT_LAST);
 410
 411         // use Set/GetImageList and Set/GetStateImageList
 412     wxImageList *GetImageList(int) const
 413         { return GetImageList(); }
 414     void SetImageList(wxImageList *imageList, int)
 415         { SetImageList(imageList); }
 416
 417     // implementation
 418     // --------------
 419     void Command(wxCommandEvent& event) { ProcessCommand(event); };
 420     virtual bool MSWCommand(WXUINT param, WXWORD id);
 421     virtual bool MSWNotify(WXWPARAM wParam, WXLPARAM lParam, WXLPARAM *result);
 422
 423 protected:
 424     // SetImageList helper
 425     void SetAnyImageList(wxImageList *imageList, int which);
 426
 427     wxTextCtrl*  m_textCtrl;        // used while editing the item label
 428     wxImageList *m_imageListNormal, // images for tree elements
 429                 *m_imageListState;  // special images for app defined states
 430
 431 private:
 432     // the common part of all ctors
 433     void Init();
 434
 435     // helper functions
 436     inline bool DoGetItem(wxTreeViewItem *tvItem) const;
 437     inline void DoSetItem(wxTreeViewItem *tvItem);
 438
 439     inline void DoExpand(const wxTreeItemId& item, int flag);
 440
 441     wxTreeItemId DoInsertItem(const wxTreeItemId& parent,
 442                               wxTreeItemId hInsertAfter,
 443                               const wxString& text,
 444                               int image, int selectedImage,
 445                               wxTreeItemData *data);
 446
 447     void DeleteTextCtrl();
 448
 449     DECLARE_DYNAMIC_CLASS(wxTreeCtrl)
 450 };
 451
 452 // ----------------------------------------------------------------------------
 453 // wxTreeEvent is a special class for all events associated with tree controls
 454 //
 455 // NB: note that not all accessors make sense for all events, see the event
 456 //     descriptions below
 457 // ----------------------------------------------------------------------------
 458 class WXDLLEXPORT wxTreeEvent : public wxNotifyEvent
 459 {
 460 friend wxTreeCtrl;
 461 public:
 462     wxTreeEvent(wxEventType commandType = wxEVT_NULL, int id = 0);
 463
 464     // accessors
 465         // get the item on which the operation was performed or the newly
 466         // selected item for wxEVT_COMMAND_TREE_SEL_CHANGED/ING events
 467     wxTreeItemId GetItem() const { return m_item; }
 468
 469         // for wxEVT_COMMAND_TREE_SEL_CHANGED/ING events, get the previously
 470         // selected item
 471     wxTreeItemId GetOldItem() const { return m_itemOld; }
 472
 473         // the point where the mouse was when the drag operation started (for
 474         // wxEVT_COMMAND_TREE_BEGIN_(R)DRAG events only)
 475     wxPoint GetPoint() const { return m_pointDrag; }
 476
 477         // keyboard code (for wxEVT_COMMAND_TREE_KEY_DOWN only)
 478     int GetCode() const { return m_code; }
 479
 480 private:
 481     // @@ we could save some space by using union here
 482     int           m_code;
 483     wxTreeItemId  m_item,
 484                   m_itemOld;
 485     wxPoint       m_pointDrag;
 486
 487     DECLARE_DYNAMIC_CLASS(wxTreeEvent)
 488 };
 489
 490 typedef void (wxEvtHandler::*wxTreeEventFunction)(wxTreeEvent&);
 491
 492 // ----------------------------------------------------------------------------
 493 // macros for handling tree control events
 494 // ----------------------------------------------------------------------------
 495
 496 // GetItem() returns the item being dragged, GetPoint() the mouse coords
 497 #define EVT_TREE_BEGIN_DRAG(id, fn) { wxEVT_COMMAND_TREE_BEGIN_DRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 498 #define EVT_TREE_BEGIN_RDRAG(id, fn) { wxEVT_COMMAND_TREE_BEGIN_RDRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 499
 500 // GetItem() returns the itme whose label is being edited
 501 #define EVT_TREE_BEGIN_LABEL_EDIT(id, fn) { wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 502 #define EVT_TREE_END_LABEL_EDIT(id, fn) { wxEVT_COMMAND_TREE_END_LABEL_EDIT, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 503
 504 // provide/update information about GetItem() item
 505 #define EVT_TREE_GET_INFO(id, fn) { wxEVT_COMMAND_TREE_GET_INFO, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 506 #define EVT_TREE_SET_INFO(id, fn) { wxEVT_COMMAND_TREE_SET_INFO, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 507
 508 // GetItem() is the item being expanded/collapsed, the "ING" versions can use
 509 #define EVT_TREE_ITEM_EXPANDED(id, fn) { wxEVT_COMMAND_TREE_ITEM_EXPANDED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 510 #define EVT_TREE_ITEM_EXPANDING(id, fn) { wxEVT_COMMAND_TREE_ITEM_EXPANDING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 511 #define EVT_TREE_ITEM_COLLAPSED(id, fn) { wxEVT_COMMAND_TREE_ITEM_COLLAPSED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 512 #define EVT_TREE_ITEM_COLLAPSING(id, fn) { wxEVT_COMMAND_TREE_ITEM_COLLAPSING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 513
 514 // GetOldItem() is the item which had the selection previously, GetItem() is
 515 // the item which acquires selection
 516 #define EVT_TREE_SEL_CHANGED(id, fn) { wxEVT_COMMAND_TREE_SEL_CHANGED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 517 #define EVT_TREE_SEL_CHANGING(id, fn) { wxEVT_COMMAND_TREE_SEL_CHANGING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 518
 519 // GetCode() returns the key code
 520 // NB: this is the only message for which GetItem() is invalid (you may get the
 521 //     item from GetSelection())
 522 #define EVT_TREE_KEY_DOWN(id, fn) { wxEVT_COMMAND_TREE_KEY_DOWN, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 523
 524 // GetItem() returns the item being deleted, the associated data (if any) will
 525 // be deleted just after the return of this event handler (if any)
 526 #define EVT_TREE_DELETE_ITEM(id, fn) { wxEVT_COMMAND_TREE_DELETE_ITEM, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 527
 528 #endif
 529     // _WX_TREECTRL_H_