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