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 #ifdef __GNUWIN32__
  26 #  ifdef GetFirstChild
  27 #    undef GetFirstChild
  28 #  endif
  29
  30 #  ifdef GetNextSibling
  31 #    undef GetNextSibling
  32 #  endif
  33 #endif
  34
  35 // the type for "untyped" data
  36 typedef long wxDataType;
  37
  38 // fwd decl
  39 class  WXDLLEXPORT wxImageList;
  40 struct WXDLLEXPORT wxTreeViewItem;
  41
  42 // a callback function used for sorting tree items, it should return -1 if the
  43 // first item precedes the second, +1 if the second precedes the first or 0 if
  44 // they're equivalent
  45 class wxTreeItemData;
  46 typedef int (*wxTreeItemCmpFunc)(wxTreeItemData *item1, wxTreeItemData *item2);
  47
  48 // ----------------------------------------------------------------------------
  49 // constants
  50 // ----------------------------------------------------------------------------
  51
  52 // values for the `flags' parameter of wxTreeCtrl::HitTest() which determine
  53 // where exactly the specified point is situated:
  54     // above the client area.
  55 static const int wxTREE_HITTEST_ABOVE            = 0x0001;
  56     // below the client area.
  57 static const int wxTREE_HITTEST_BELOW            = 0x0002;
  58     // in the client area but below the last item.
  59 static const int wxTREE_HITTEST_NOWHERE          = 0x0004;
  60     // on the button associated with an item.
  61 static const int wxTREE_HITTEST_ONITEMBUTTON     = 0x0010;
  62     // on the bitmap associated with an item.
  63 static const int wxTREE_HITTEST_ONITEMICON       = 0x0020;
  64     // in the indentation associated with an item.
  65 static const int wxTREE_HITTEST_ONITEMINDENT     = 0x0040;
  66     // on the label (string) associated with an item.
  67 static const int wxTREE_HITTEST_ONITEMLABEL      = 0x0080;
  68     // in the area to the right of an item.
  69 static const int wxTREE_HITTEST_ONITEMRIGHT      = 0x0100;
  70     // on the state icon for a tree view item that is in a user-defined state.
  71 static const int wxTREE_HITTEST_ONITEMSTATEICON  = 0x0200;
  72     // to the right of the client area.
  73 static const int wxTREE_HITTEST_TOLEFT           = 0x0400;
  74     // to the left of the client area.
  75 static const int wxTREE_HITTEST_TORIGHT          = 0x0800;
  76     // anywhere on the item
  77 static const int wxTREE_HITTEST_ONITEM  = wxTREE_HITTEST_ONITEMICON |
  78                                           wxTREE_HITTEST_ONITEMLABEL |
  79                                           wxTREE_HITTEST_ONITEMSTATEICON;
  80
  81 // NB: all the following flags are for compatbility only and will be removed in the
  82 //     next versions
  83
  84 // flags for deprecated `Expand(int action)'
  85 enum
  86 {
  87     wxTREE_EXPAND_EXPAND,
  88     wxTREE_EXPAND_COLLAPSE,
  89     wxTREE_EXPAND_COLLAPSE_RESET,
  90     wxTREE_EXPAND_TOGGLE
  91 };
  92
  93 // flags for deprecated InsertItem() variant
  94 #define wxTREE_INSERT_FIRST 0xFFFF0001
  95 #define wxTREE_INSERT_LAST  0xFFFF0002
  96
  97 // ----------------------------------------------------------------------------
  98 // wxTreeItemId identifies an element of the tree. In this implementation, it's
  99 // just a trivial wrapper around Win32 HTREEITEM. It's opaque for the
 100 // application.
 101 // ----------------------------------------------------------------------------
 102 class WXDLLEXPORT wxTreeItemId
 103 {
 104 public:
 105     // ctors
 106         // 0 is invalid value for HTREEITEM
 107     wxTreeItemId() { m_itemId = 0; }
 108
 109         // default copy ctor/assignment operator are ok for us
 110
 111     // accessors
 112         // is this a valid tree item?
 113     bool IsOk() const { return m_itemId != 0; }
 114
 115     // conversion to/from either real (system-dependent) tree item id or
 116     // to "long" which used to be the type for tree item ids in previous
 117     // versions of wxWindows
 118
 119     // for wxTreeCtrl usage only
 120     wxTreeItemId(WXHTREEITEM itemId) { m_itemId = (long)itemId; }
 121     operator WXHTREEITEM() const { return (WXHTREEITEM)m_itemId; }
 122
 123     void operator=(WXHTREEITEM item) { m_itemId = (long) item; }
 124
 125 protected:
 126     long m_itemId;
 127 };
 128
 129 // ----------------------------------------------------------------------------
 130 // wxTreeItemData is some (arbitrary) user class associated with some item. The
 131 // main advantage of having this class (compared to old untyped interface) is
 132 // that wxTreeItemData's are destroyed automatically by the tree and, as this
 133 // class has virtual dtor, it means that the memory will be automatically
 134 // freed. OTOH, we don't just use wxObject instead of wxTreeItemData because
 135 // the size of this class is critical: in any real application, each tree leaf
 136 // will have wxTreeItemData associated with it and number of leaves may be
 137 // quite big.
 138 //
 139 // Because the objects of this class are deleted by the tree, they should
 140 // always be allocated on the heap!
 141 // ----------------------------------------------------------------------------
 142 class WXDLLEXPORT wxTreeItemData : private wxTreeItemId
 143 {
 144 public:
 145     // default ctor/copy ctor/assignment operator are ok
 146
 147     // dtor is virtual and all the items are deleted by the tree control when
 148     // it's deleted, so you normally don't have to care about freeing memory
 149     // allocated in your wxTreeItemData-derived class
 150     virtual ~wxTreeItemData() { }
 151
 152     // accessors: set/get the item associated with this node
 153     void SetId(const wxTreeItemId& id) { m_itemId = id; }
 154     const wxTreeItemId& GetId() const { return (wxTreeItemId&) m_itemId; }
 155 };
 156
 157 // ----------------------------------------------------------------------------
 158 // wxTreeCtrl
 159 // ----------------------------------------------------------------------------
 160 class WXDLLEXPORT wxTreeCtrl : public wxControl
 161 {
 162 public:
 163     // creation
 164     // --------
 165     wxTreeCtrl() { Init(); }
 166
 167     wxTreeCtrl(wxWindow *parent, wxWindowID id = -1,
 168                const wxPoint& pos = wxDefaultPosition,
 169                const wxSize& size = wxDefaultSize,
 170                long style = wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT,
 171                const wxValidator& validator = wxDefaultValidator,
 172                const wxString& name = "wxTreeCtrl")
 173     {
 174         Create(parent, id, pos, size, style, validator, name);
 175     }
 176
 177     virtual ~wxTreeCtrl();
 178
 179     bool Create(wxWindow *parent, wxWindowID id = -1,
 180                 const wxPoint& pos = wxDefaultPosition,
 181                 const wxSize& size = wxDefaultSize,
 182                 long style = wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT,
 183                 const wxValidator& validator = wxDefaultValidator,
 184                 const wxString& name = "wxTreeCtrl");
 185
 186     // accessors
 187     // ---------
 188
 189         // get the total number of items in the control
 190     size_t GetCount() const;
 191
 192         // indent is the number of pixels the children are indented relative to
 193         // the parents position. SetIndent() also redraws the control
 194         // immediately.
 195     unsigned int GetIndent() const;
 196     void SetIndent(unsigned int indent);
 197
 198         // image list: these functions allow to associate an image list with
 199         // the control and retrieve it. Note that the control does _not_ delete
 200         // the associated image list when it's deleted in order to allow image
 201         // lists to be shared between different controls.
 202         //
 203         // The normal image list is for the icons which correspond to the
 204         // normal tree item state (whether it is selected or not).
 205         // Additionally, the application might choose to show a state icon
 206         // which corresponds to an app-defined item state (for example,
 207         // checked/unchecked) which are taken from the state image list.
 208     wxImageList *GetImageList() const;
 209     wxImageList *GetStateImageList() const;
 210
 211     void SetImageList(wxImageList *imageList);
 212     void SetStateImageList(wxImageList *imageList);
 213
 214     // Functions to work with tree ctrl items. Unfortunately, they can _not_ be
 215     // member functions of wxTreeItem because they must know the tree the item
 216     // belongs to for Windows implementation and storing the pointer to
 217     // wxTreeCtrl in each wxTreeItem is just too much waste.
 218
 219     // accessors
 220     // ---------
 221
 222         // retrieve items label
 223     wxString GetItemText(const wxTreeItemId& item) const;
 224         // get the normal item image
 225     int GetItemImage(const wxTreeItemId& item) const;
 226         // get the selected item image
 227     int GetItemSelectedImage(const wxTreeItemId& item) const;
 228         // get the data associated with the item
 229     wxTreeItemData *GetItemData(const wxTreeItemId& item) const;
 230
 231     // modifiers
 232     // ---------
 233
 234         // set items label
 235     void SetItemText(const wxTreeItemId& item, const wxString& text);
 236         // set the normal item image
 237     void SetItemImage(const wxTreeItemId& item, int image);
 238         // set the selected item image
 239     void SetItemSelectedImage(const wxTreeItemId& item, int image);
 240         // associate some data with the item
 241     void SetItemData(const wxTreeItemId& item, wxTreeItemData *data);
 242
 243         // force appearance of [+] button near the item. This is useful to
 244         // allow the user to expand the items which don't have any children now
 245         // - but instead add them only when needed, thus minimizing memory
 246         // usage and loading time.
 247     void SetItemHasChildren(const wxTreeItemId& item, bool has = TRUE);
 248
 249         // the item will be shown in bold
 250     void SetItemBold(const wxTreeItemId& item, bool bold = TRUE);
 251
 252     // item status inquiries
 253     // ---------------------
 254
 255         // is the item visible (it might be outside the view or not expanded)?
 256     bool IsVisible(const wxTreeItemId& item) const;
 257         // does the item has any children?
 258     bool ItemHasChildren(const wxTreeItemId& item) const;
 259         // is the item expanded (only makes sense if HasChildren())?
 260     bool IsExpanded(const wxTreeItemId& item) const;
 261         // is this item currently selected (the same as has focus)?
 262     bool IsSelected(const wxTreeItemId& item) const;
 263         // is item text in bold font?
 264     bool IsBold(const wxTreeItemId& item) const;
 265
 266     // number of children
 267     // ------------------
 268
 269         // if 'recursively' is FALSE, only immediate children count, otherwise
 270         // the returned number is the number of all items in this branch
 271     size_t GetChildrenCount(const wxTreeItemId& item, bool recursively = TRUE);
 272
 273     // navigation
 274     // ----------
 275
 276     // wxTreeItemId.IsOk() will return FALSE if there is no such item
 277
 278         // get the root tree item
 279     wxTreeItemId GetRootItem() const;
 280
 281         // get the item currently selected (may return NULL if no selection)
 282     wxTreeItemId GetSelection() const;
 283
 284         // get the parent of this item (may return NULL if root)
 285     wxTreeItemId GetParent(const wxTreeItemId& item) const;
 286
 287         // for this enumeration function you must pass in a "cookie" parameter
 288         // which is opaque for the application but is necessary for the library
 289         // to make these functions reentrant (i.e. allow more than one
 290         // enumeration on one and the same object simultaneously). Of course,
 291         // the "cookie" passed to GetFirstChild() and GetNextChild() should be
 292         // the same!
 293
 294         // get the first child of this item
 295     wxTreeItemId GetFirstChild(const wxTreeItemId& item, long& _cookie) const;
 296         // get the next child
 297     wxTreeItemId GetNextChild(const wxTreeItemId& item, long& _cookie) const;
 298
 299         // get the next sibling of this item
 300     wxTreeItemId GetNextSibling(const wxTreeItemId& item) const;
 301         // get the previous sibling
 302     wxTreeItemId GetPrevSibling(const wxTreeItemId& item) const;
 303
 304         // get first visible item
 305     wxTreeItemId GetFirstVisibleItem() const;
 306         // get the next visible item: item must be visible itself!
 307         // see IsVisible() and wxTreeCtrl::GetFirstVisibleItem()
 308     wxTreeItemId GetNextVisible(const wxTreeItemId& item) const;
 309         // get the previous visible item: item must be visible itself!
 310     wxTreeItemId GetPrevVisible(const wxTreeItemId& item) const;
 311
 312     // operations
 313     // ----------
 314
 315         // add the root node to the tree
 316     wxTreeItemId AddRoot(const wxString& text,
 317                          int image = -1, int selectedImage = -1,
 318                          wxTreeItemData *data = NULL);
 319
 320         // insert a new item in as the first child of the parent
 321     wxTreeItemId PrependItem(const wxTreeItemId& parent,
 322                              const wxString& text,
 323                              int image = -1, int selectedImage = -1,
 324                              wxTreeItemData *data = NULL);
 325
 326         // insert a new item after a given one
 327     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 328                             const wxTreeItemId& idPrevious,
 329                             const wxString& text,
 330                             int image = -1, int selectedImage = -1,
 331                             wxTreeItemData *data = NULL);
 332
 333         // insert a new item in as the last child of the parent
 334     wxTreeItemId AppendItem(const wxTreeItemId& parent,
 335                             const wxString& text,
 336                             int image = -1, int selectedImage = -1,
 337                             wxTreeItemData *data = NULL);
 338
 339         // delete this item and associated data if any
 340     void Delete(const wxTreeItemId& item);
 341         // delete all items from the tree
 342     void DeleteAllItems();
 343
 344         // expand this item
 345     void Expand(const wxTreeItemId& item);
 346         // collapse the item without removing its children
 347     void Collapse(const wxTreeItemId& item);
 348         // collapse the item and remove all children
 349     void CollapseAndReset(const wxTreeItemId& item);
 350         // toggles the current state
 351     void Toggle(const wxTreeItemId& item);
 352
 353         // remove the selection from currently selected item (if any)
 354     void Unselect();
 355         // select this item
 356     void SelectItem(const wxTreeItemId& item);
 357         // make sure this item is visible (expanding the parent item and/or
 358         // scrolling to this item if necessary)
 359     void EnsureVisible(const wxTreeItemId& item);
 360         // scroll to this item (but don't expand its parent)
 361     void ScrollTo(const wxTreeItemId& item);
 362
 363         // start editing the item label: this (temporarily) replaces the item
 364         // with a one line edit control. The item will be selected if it hadn't
 365         // been before. textCtrlClass parameter allows you to create an edit
 366         // control of arbitrary user-defined class deriving from wxTextCtrl.
 367     wxTextCtrl* EditLabel(const wxTreeItemId& item,
 368                           wxClassInfo* textCtrlClass = CLASSINFO(wxTextCtrl));
 369         // returns the same pointer as StartEdit() if the item is being edited,
 370         // NULL otherwise (it's assumed that no more than one item may be
 371         // edited simultaneously)
 372     wxTextCtrl* GetEditControl() const;
 373         // end editing and accept or discard the changes to item label
 374     void EndEditLabel(const wxTreeItemId& item, bool discardChanges = FALSE);
 375
 376         // sort the children of this item using the specified callback function
 377         // (it should return -1, 0 or +1 as usual), if it's not specified
 378         // alphabetical comparaison is performed.
 379         //
 380         // NB: this function is not reentrant!
 381     void SortChildren(const wxTreeItemId& item,
 382                       wxTreeItemCmpFunc *cmpFunction = NULL);
 383
 384     // helpers
 385     // -------
 386
 387         // determine to which item (if any) belongs the given point (the
 388         // coordinates specified are relative to the client area of tree ctrl)
 389         // and fill the flags parameter with a bitmask of wxTREE_HITTEST_xxx
 390         // constants.
 391         //
 392         // The first function is more portable (because easier to implement
 393         // on other platforms), but the second one returns some extra info.
 394     wxTreeItemId HitTest(const wxPoint& point)
 395         { int dummy; return HitTest(point, dummy); }
 396     wxTreeItemId HitTest(const wxPoint& point, int& flags);
 397
 398         // get the bounding rectangle of the item (or of its label only)
 399         // @@@ do we really need to expose this functions to the application?
 400     void GetBoundingRect(const wxTreeItemId& item,
 401                          wxRect& rect,
 402                          bool textOnly = FALSE) const;
 403
 404     // deprecated
 405     // ----------
 406
 407     // these methods are deprecated and will be removed in future versions of
 408     // wxWindows, they're here for compatibility only, don't use them in new
 409     // code (the comments indicate why these methods are now useless and how to
 410     // replace them)
 411
 412         // use Expand, Collapse, CollapseAndReset or Toggle
 413     void ExpandItem(const wxTreeItemId& item, int action);
 414
 415         // use AddRoot, PrependItem or AppendItem
 416     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 417                             const wxString& text,
 418                             int image = -1, int selImage = -1,
 419                             long insertAfter = wxTREE_INSERT_LAST);
 420
 421         // use Set/GetImageList and Set/GetStateImageList
 422     wxImageList *GetImageList(int) const
 423         { return GetImageList(); }
 424     void SetImageList(wxImageList *imageList, int)
 425         { SetImageList(imageList); }
 426
 427     // implementation
 428     // --------------
 429     void Command(wxCommandEvent& event) { ProcessCommand(event); };
 430     virtual bool MSWCommand(WXUINT param, WXWORD id);
 431     virtual bool MSWNotify(WXWPARAM wParam, WXLPARAM lParam, WXLPARAM *result);
 432
 433 protected:
 434     // SetImageList helper
 435     void SetAnyImageList(wxImageList *imageList, int which);
 436
 437     wxTextCtrl*  m_textCtrl;        // used while editing the item label
 438     wxImageList *m_imageListNormal, // images for tree elements
 439                 *m_imageListState;  // special images for app defined states
 440
 441 private:
 442     // the common part of all ctors
 443     void Init();
 444
 445     // helper functions
 446     inline bool DoGetItem(wxTreeViewItem *tvItem) const;
 447     inline void DoSetItem(wxTreeViewItem *tvItem);
 448
 449     inline void DoExpand(const wxTreeItemId& item, int flag);
 450
 451     wxTreeItemId DoInsertItem(const wxTreeItemId& parent,
 452                               wxTreeItemId hInsertAfter,
 453                               const wxString& text,
 454                               int image, int selectedImage,
 455                               wxTreeItemData *data);
 456
 457     void DeleteTextCtrl();
 458
 459     DECLARE_DYNAMIC_CLASS(wxTreeCtrl)
 460 };
 461
 462 // ----------------------------------------------------------------------------
 463 // wxTreeEvent is a special class for all events associated with tree controls
 464 //
 465 // NB: note that not all accessors make sense for all events, see the event
 466 //     descriptions below
 467 // ----------------------------------------------------------------------------
 468 class WXDLLEXPORT wxTreeEvent : public wxNotifyEvent
 469 {
 470 friend wxTreeCtrl;
 471 public:
 472     wxTreeEvent(wxEventType commandType = wxEVT_NULL, int id = 0);
 473
 474     // accessors
 475         // get the item on which the operation was performed or the newly
 476         // selected item for wxEVT_COMMAND_TREE_SEL_CHANGED/ING events
 477     wxTreeItemId GetItem() const { return m_item; }
 478
 479         // for wxEVT_COMMAND_TREE_SEL_CHANGED/ING events, get the previously
 480         // selected item
 481     wxTreeItemId GetOldItem() const { return m_itemOld; }
 482
 483         // the point where the mouse was when the drag operation started (for
 484         // wxEVT_COMMAND_TREE_BEGIN_(R)DRAG events only)
 485     wxPoint GetPoint() const { return m_pointDrag; }
 486
 487         // keyboard code (for wxEVT_COMMAND_TREE_KEY_DOWN only)
 488     int GetCode() const { return m_code; }
 489
 490 private:
 491     // @@ we could save some space by using union here
 492     int           m_code;
 493     wxTreeItemId  m_item,
 494                   m_itemOld;
 495     wxPoint       m_pointDrag;
 496
 497     DECLARE_DYNAMIC_CLASS(wxTreeEvent)
 498 };
 499
 500 typedef void (wxEvtHandler::*wxTreeEventFunction)(wxTreeEvent&);
 501
 502 // ----------------------------------------------------------------------------
 503 // macros for handling tree control events
 504 // ----------------------------------------------------------------------------
 505
 506 // GetItem() returns the item being dragged, GetPoint() the mouse coords
 507 #define EVT_TREE_BEGIN_DRAG(id, fn) { wxEVT_COMMAND_TREE_BEGIN_DRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 508 #define EVT_TREE_BEGIN_RDRAG(id, fn) { wxEVT_COMMAND_TREE_BEGIN_RDRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 509
 510 // GetItem() returns the itme whose label is being edited
 511 #define EVT_TREE_BEGIN_LABEL_EDIT(id, fn) { wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 512 #define EVT_TREE_END_LABEL_EDIT(id, fn) { wxEVT_COMMAND_TREE_END_LABEL_EDIT, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 513
 514 // provide/update information about GetItem() item
 515 #define EVT_TREE_GET_INFO(id, fn) { wxEVT_COMMAND_TREE_GET_INFO, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 516 #define EVT_TREE_SET_INFO(id, fn) { wxEVT_COMMAND_TREE_SET_INFO, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 517
 518 // GetItem() is the item being expanded/collapsed, the "ING" versions can use
 519 #define EVT_TREE_ITEM_EXPANDED(id, fn) { wxEVT_COMMAND_TREE_ITEM_EXPANDED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 520 #define EVT_TREE_ITEM_EXPANDING(id, fn) { wxEVT_COMMAND_TREE_ITEM_EXPANDING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 521 #define EVT_TREE_ITEM_COLLAPSED(id, fn) { wxEVT_COMMAND_TREE_ITEM_COLLAPSED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 522 #define EVT_TREE_ITEM_COLLAPSING(id, fn) { wxEVT_COMMAND_TREE_ITEM_COLLAPSING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 523
 524 // GetOldItem() is the item which had the selection previously, GetItem() is
 525 // the item which acquires selection
 526 #define EVT_TREE_SEL_CHANGED(id, fn) { wxEVT_COMMAND_TREE_SEL_CHANGED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 527 #define EVT_TREE_SEL_CHANGING(id, fn) { wxEVT_COMMAND_TREE_SEL_CHANGING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 528
 529 // GetCode() returns the key code
 530 // NB: this is the only message for which GetItem() is invalid (you may get the
 531 //     item from GetSelection())
 532 #define EVT_TREE_KEY_DOWN(id, fn) { wxEVT_COMMAND_TREE_KEY_DOWN, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 533
 534 // GetItem() returns the item being deleted, the associated data (if any) will
 535 // be deleted just after the return of this event handler (if any)
 536 #define EVT_TREE_DELETE_ITEM(id, fn) { wxEVT_COMMAND_TREE_DELETE_ITEM, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 537
 538 #endif
 539     // _WX_TREECTRL_H_