include/wx/generic/treectrl.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        treectrl.h
   3 // Purpose:     wxTreeCtrl class
   4 // Author:      Robert Roebling
   5 // Modified by:
   6 // Created:     01/02/97
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1997,1998 Robert Roebling
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _GENERIC_TREECTRL_H_
  13 #define _GENERIC_TREECTRL_H_
  14
  15 #ifdef __GNUG__
  16     #pragma interface "treectrl.h"
  17 #endif
  18
  19 #ifdef __WXMSW__
  20 WXDLLEXPORT_DATA(extern const char*) wxTreeCtrlNameStr;
  21 #else
  22 #define wxTreeCtrlNameStr "wxTreeCtrl"
  23 #endif
  24
  25 #include "wx/defs.h"
  26 #include "wx/string.h"
  27 #include "wx/object.h"
  28 #include "wx/event.h"
  29 #include "wx/scrolwin.h"
  30 #include "wx/textctrl.h"
  31 #include "wx/pen.h"
  32 #include "wx/dynarray.h"
  33
  34 #ifndef wxTR_SINGLE
  35 #define wxTR_SINGLE                 0x0000
  36 #define wxTR_MULTIPLE               0x0020
  37 #define wxTR_EXTENDED               0x0040
  38 #define wxTR_HAS_VARIABLE_ROW_HIGHT 0x0080
  39 #endif
  40
  41 // -----------------------------------------------------------------------------
  42 // constants
  43 // -----------------------------------------------------------------------------
  44
  45 // values for the `flags' parameter of wxTreeCtrl::HitTest() which determine
  46 // where exactly the specified point is situated:
  47
  48 static const int wxTREE_HITTEST_ABOVE            = 0x0001;
  49 static const int wxTREE_HITTEST_BELOW            = 0x0002;
  50 static const int wxTREE_HITTEST_NOWHERE          = 0x0004;
  51     // on the button associated with an item.
  52 static const int wxTREE_HITTEST_ONITEMBUTTON     = 0x0008;
  53     // on the bitmap associated with an item.
  54 static const int wxTREE_HITTEST_ONITEMICON       = 0x0010;
  55     // on the ident associated with an item.
  56 static const int wxTREE_HITTEST_ONITEMIDENT      = 0x0020;
  57     // on the label (string) associated with an item.
  58 static const int wxTREE_HITTEST_ONITEMLABEL      = 0x0040;
  59     // on the right of the label associated with an item.
  60 static const int wxTREE_HITTEST_ONITEMRIGHT      = 0x0080;
  61     // on the label (string) associated with an item.
  62 //static const int wxTREE_HITTEST_ONITEMSTATEICON  = 0x0100;
  63     // on the left of the wxTreeCtrl.
  64 static const int wxTREE_HITTEST_TOLEFT           = 0x0200;
  65     // on the right of the wxTreeCtrl.
  66 static const int wxTREE_HITTEST_TORIGHT          = 0x0400;
  67     // on the upper part (first half) of the item.
  68 static const int wxTREE_HITTEST_ONITEMUPPERPART  = 0x0800;
  69     // on the lower part (second half) of the item.
  70 static const int wxTREE_HITTEST_ONITEMLOWERPART  = 0x1000;
  71
  72     // anywhere on the item
  73 static const int wxTREE_HITTEST_ONITEM  = wxTREE_HITTEST_ONITEMICON |
  74                                           wxTREE_HITTEST_ONITEMLABEL;
  75
  76 // -----------------------------------------------------------------------------
  77 // forward declaration
  78 // -----------------------------------------------------------------------------
  79
  80 class wxImageList;
  81 class wxGenericTreeItem;
  82
  83 class wxTreeItemData;
  84
  85 // -----------------------------------------------------------------------------
  86 // wxTreeItemId - unique identifier of a tree element
  87 // -----------------------------------------------------------------------------
  88
  89 class WXDLLEXPORT wxTreeItemId
  90 {
  91 friend class wxTreeCtrl;
  92 friend class wxTreeEvent;
  93 public:
  94     // ctors
  95         // 0 is invalid value for HTREEITEM
  96     wxTreeItemId() { m_pItem = 0; }
  97
  98         // default copy ctor/assignment operator are ok for us
  99
 100     // accessors
 101         // is this a valid tree item?
 102     bool IsOk() const { return m_pItem != 0; }
 103
 104     // deprecated: only for compatibility
 105     wxTreeItemId(long itemId) { m_pItem = (wxGenericTreeItem *)itemId; }
 106     operator long() const { return (long)m_pItem; }
 107
 108 //protected: // not for gcc
 109     // for wxTreeCtrl usage only
 110     wxTreeItemId(wxGenericTreeItem *pItem) { m_pItem = pItem; }
 111
 112     wxGenericTreeItem *m_pItem;
 113 };
 114
 115 WX_DECLARE_OBJARRAY(wxTreeItemId, wxArrayTreeItemIds);
 116
 117 // ----------------------------------------------------------------------------
 118 // wxTreeItemData is some (arbitrary) user class associated with some item.
 119 //
 120 // Because the objects of this class are deleted by the tree, they should
 121 // always be allocated on the heap!
 122 // ----------------------------------------------------------------------------
 123 class WXDLLEXPORT wxTreeItemData: public wxClientData
 124 {
 125 friend class wxTreeCtrl;
 126 public:
 127     // creation/destruction
 128     // --------------------
 129         // default ctor
 130     wxTreeItemData() { }
 131
 132         // default copy ctor/assignment operator are ok
 133
 134     // accessor: get the item associated with us
 135     const wxTreeItemId& GetId() const { return m_pItem; }
 136     void SetId(const wxTreeItemId& id) { m_pItem = id; }
 137
 138 protected:
 139     wxTreeItemId m_pItem;
 140 };
 141
 142 // -----------------------------------------------------------------------------
 143 // wxTreeEvent - the event generated by the tree control
 144 // -----------------------------------------------------------------------------
 145 class WXDLLEXPORT wxTreeEvent : public wxNotifyEvent
 146 {
 147 friend class wxTreeCtrl;
 148 public:
 149     wxTreeEvent(wxEventType commandType = wxEVT_NULL, int id = 0);
 150
 151     // accessors
 152         // get the item on which the operation was performed or the newly
 153         // selected item for wxEVT_COMMAND_TREE_SEL_CHANGED/ING events
 154     wxTreeItemId GetItem() const { return m_item; }
 155
 156         // for wxEVT_COMMAND_TREE_SEL_CHANGED/ING events, get the previously
 157         // selected item
 158     wxTreeItemId GetOldItem() const { return m_itemOld; }
 159
 160         // the point where the mouse was when the drag operation started (for
 161         // wxEVT_COMMAND_TREE_BEGIN_(R)DRAG events only)
 162     wxPoint GetPoint() const { return m_pointDrag; }
 163
 164         // keyboard code (for wxEVT_COMMAND_TREE_KEY_DOWN only)
 165     int GetCode() const { return m_code; }
 166
 167     // set return code for wxEVT_COMMAND_TREE_ITEM_{EXPAND|COLLAPS}ING events
 168         // call this to forbid the change in item status
 169     void Veto() { m_code = TRUE; }
 170
 171         // for implementation usage only
 172     bool WasVetoed() const { return m_code; }
 173
 174 private:
 175     // @@ we could save some space by using union here
 176     int           m_code;
 177     wxTreeItemId  m_item,
 178                   m_itemOld;
 179     wxPoint       m_pointDrag;
 180
 181     DECLARE_DYNAMIC_CLASS(wxTreeEvent)
 182 };
 183
 184 typedef void (wxEvtHandler::*wxTreeEventFunction)(wxTreeEvent&);
 185
 186 // ----------------------------------------------------------------------------
 187 // macros for handling tree control events
 188 // ----------------------------------------------------------------------------
 189
 190 // GetItem() returns the item being dragged, GetPoint() the mouse coords
 191 #define EVT_TREE_BEGIN_DRAG(id, fn) { wxEVT_COMMAND_TREE_BEGIN_DRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 192 #define EVT_TREE_BEGIN_RDRAG(id, fn) { wxEVT_COMMAND_TREE_BEGIN_RDRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 193
 194 // GetItem() returns the itme whose label is being edited
 195 #define EVT_TREE_BEGIN_LABEL_EDIT(id, fn) { wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 196 #define EVT_TREE_END_LABEL_EDIT(id, fn) { wxEVT_COMMAND_TREE_END_LABEL_EDIT, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 197
 198 // provide/update information about GetItem() item
 199 #define EVT_TREE_GET_INFO(id, fn) { wxEVT_COMMAND_TREE_GET_INFO, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 200 #define EVT_TREE_SET_INFO(id, fn) { wxEVT_COMMAND_TREE_SET_INFO, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 201
 202 // GetItem() is the item being expanded/collapsed, the "ING" versions can use
 203 #define EVT_TREE_ITEM_EXPANDED(id, fn) { wxEVT_COMMAND_TREE_ITEM_EXPANDED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 204 #define EVT_TREE_ITEM_EXPANDING(id, fn) { wxEVT_COMMAND_TREE_ITEM_EXPANDING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 205 #define EVT_TREE_ITEM_COLLAPSED(id, fn) { wxEVT_COMMAND_TREE_ITEM_COLLAPSED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 206 #define EVT_TREE_ITEM_COLLAPSING(id, fn) { wxEVT_COMMAND_TREE_ITEM_COLLAPSING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 207
 208 // GetOldItem() is the item which had the selection previously, GetItem() is
 209 // the item which acquires selection
 210 #define EVT_TREE_SEL_CHANGED(id, fn) { wxEVT_COMMAND_TREE_SEL_CHANGED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 211 #define EVT_TREE_SEL_CHANGING(id, fn) { wxEVT_COMMAND_TREE_SEL_CHANGING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 212
 213 // GetCode() returns the key code
 214 // NB: this is the only message for which GetItem() is invalid (you may get the
 215 //     item from GetSelection())
 216 #define EVT_TREE_KEY_DOWN(id, fn) { wxEVT_COMMAND_TREE_KEY_DOWN, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 217
 218 // GetItem() returns the item being deleted, the associated data (if any) will
 219 // be deleted just after the return of this event handler (if any)
 220 #define EVT_TREE_DELETE_ITEM(id, fn) { wxEVT_COMMAND_TREE_DELETE_ITEM, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 221
 222 // GetItem() returns the item that was activated (double click, enter, space)
 223 #define EVT_TREE_ITEM_ACTIVATED(id, fn) { wxEVT_COMMAND_TREE_ITEM_ACTIVATED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 224
 225 // -----------------------------------------------------------------------------
 226 // wxTreeCtrl - the tree control
 227 // -----------------------------------------------------------------------------
 228
 229 class WXDLLEXPORT wxTreeCtrl : public wxScrolledWindow
 230 {
 231 public:
 232     // creation
 233     // --------
 234     wxTreeCtrl() { Init(); }
 235
 236     wxTreeCtrl(wxWindow *parent, wxWindowID id = -1,
 237                const wxPoint& pos = wxDefaultPosition,
 238                const wxSize& size = wxDefaultSize,
 239                long style = wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT,
 240                const wxValidator &validator = wxDefaultValidator,
 241                const wxString& name = wxTreeCtrlNameStr)
 242     {
 243         Create(parent, id, pos, size, style, validator, name);
 244     }
 245
 246     virtual ~wxTreeCtrl();
 247
 248     bool Create(wxWindow *parent, wxWindowID id = -1,
 249                 const wxPoint& pos = wxDefaultPosition,
 250                 const wxSize& size = wxDefaultSize,
 251                 long style = wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT,
 252                 const wxValidator &validator = wxDefaultValidator,
 253                 const wxString& name = wxTreeCtrlNameStr);
 254
 255     // accessors
 256     // ---------
 257
 258         // get the total number of items in the control
 259     size_t GetCount() const;
 260
 261         // indent is the number of pixels the children are indented relative to
 262         // the parents position. SetIndent() also redraws the control
 263         // immediately.
 264     unsigned int GetIndent() const { return m_indent; }
 265     void SetIndent(unsigned int indent);
 266
 267         // spacing is the number of pixels between the start and the Text
 268     unsigned int GetSpacing() const { return m_spacing; }
 269     void SetSpacing(unsigned int spacing);
 270
 271         // image list: these functions allow to associate an image list with
 272         // the control and retrieve it. Note that the control does _not_ delete
 273         // the associated image list when it's deleted in order to allow image
 274         // lists to be shared between different controls.
 275         //
 276         // The normal image list is for the icons which correspond to the
 277         // normal tree item state (whether it is selected or not).
 278         // Additionally, the application might choose to show a state icon
 279         // which corresponds to an app-defined item state (for example,
 280         // checked/unchecked) which are taken from the state image list.
 281     wxImageList *GetImageList() const;
 282     wxImageList *GetStateImageList() const;
 283
 284     void SetImageList(wxImageList *imageList);
 285     void SetStateImageList(wxImageList *imageList);
 286
 287     // Functions to work with tree ctrl items.
 288
 289     // accessors
 290     // ---------
 291
 292         // retrieve items label
 293     wxString GetItemText(const wxTreeItemId& item) const;
 294         // get the normal item image
 295     int GetItemImage(const wxTreeItemId& item) const;
 296         // get the selected item image
 297     int GetItemSelectedImage(const wxTreeItemId& item) const;
 298         // get the data associated with the item
 299     wxTreeItemData *GetItemData(const wxTreeItemId& item) const;
 300
 301     // modifiers
 302     // ---------
 303
 304         // set items label
 305     void SetItemText(const wxTreeItemId& item, const wxString& text);
 306         // set the normal item image
 307     void SetItemImage(const wxTreeItemId& item, int image);
 308         // set the selected item image
 309     void SetItemSelectedImage(const wxTreeItemId& item, int image);
 310         // associate some data with the item
 311     void SetItemData(const wxTreeItemId& item, wxTreeItemData *data);
 312
 313         // force appearance of [+] button near the item. This is useful to
 314         // allow the user to expand the items which don't have any children now
 315         // - but instead add them only when needed, thus minimizing memory
 316         // usage and loading time.
 317     void SetItemHasChildren(const wxTreeItemId& item, bool has = TRUE);
 318
 319         // the item will be shown in bold
 320     void SetItemBold(const wxTreeItemId& item, bool bold = TRUE);
 321
 322     // item status inquiries
 323     // ---------------------
 324
 325         // is the item visible (it might be outside the view or not expanded)?
 326     bool IsVisible(const wxTreeItemId& item) const;
 327         // does the item has any children?
 328     bool HasChildren(const wxTreeItemId& item) const
 329       { return ItemHasChildren(item); }
 330     bool ItemHasChildren(const wxTreeItemId& item) const;
 331         // is the item expanded (only makes sense if HasChildren())?
 332     bool IsExpanded(const wxTreeItemId& item) const;
 333         // is this item currently selected (the same as has focus)?
 334     bool IsSelected(const wxTreeItemId& item) const;
 335         // is item text in bold font?
 336     bool IsBold(const wxTreeItemId& item) const;
 337
 338     // number of children
 339     // ------------------
 340
 341         // if 'recursively' is FALSE, only immediate children count, otherwise
 342         // the returned number is the number of all items in this branch
 343     size_t GetChildrenCount(const wxTreeItemId& item, bool recursively = TRUE);
 344
 345     // navigation
 346     // ----------
 347
 348     // wxTreeItemId.IsOk() will return FALSE if there is no such item
 349
 350         // get the root tree item
 351     wxTreeItemId GetRootItem() const { return m_anchor; }
 352
 353         // get the item currently selected (may return NULL if no selection)
 354     wxTreeItemId GetSelection() const { return m_current; }
 355
 356         // get the items currently selected, return the number of such item
 357     size_t GetSelections(wxArrayTreeItemIds&) const;
 358
 359         // get the parent of this item (may return NULL if root)
 360     wxTreeItemId GetParent(const wxTreeItemId& item) const;
 361
 362         // for this enumeration function you must pass in a "cookie" parameter
 363         // which is opaque for the application but is necessary for the library
 364         // to make these functions reentrant (i.e. allow more than one
 365         // enumeration on one and the same object simultaneously). Of course,
 366         // the "cookie" passed to GetFirstChild() and GetNextChild() should be
 367         // the same!
 368
 369         // get the first child of this item
 370     wxTreeItemId GetFirstChild(const wxTreeItemId& item, long& cookie) const;
 371         // get the next child
 372     wxTreeItemId GetNextChild(const wxTreeItemId& item, long& cookie) const;
 373         // get the last child of this item - this method doesn't use cookies
 374     wxTreeItemId GetLastChild(const wxTreeItemId& item) const;
 375
 376         // get the next sibling of this item
 377     wxTreeItemId GetNextSibling(const wxTreeItemId& item) const;
 378         // get the previous sibling
 379     wxTreeItemId GetPrevSibling(const wxTreeItemId& item) const;
 380
 381         // get first visible item
 382     wxTreeItemId GetFirstVisibleItem() const;
 383         // get the next visible item: item must be visible itself!
 384         // see IsVisible() and wxTreeCtrl::GetFirstVisibleItem()
 385     wxTreeItemId GetNextVisible(const wxTreeItemId& item) const;
 386         // get the previous visible item: item must be visible itself!
 387     wxTreeItemId GetPrevVisible(const wxTreeItemId& item) const;
 388
 389     // operations
 390     // ----------
 391
 392         // add the root node to the tree
 393     wxTreeItemId AddRoot(const wxString& text,
 394                          int image = -1, int selectedImage = -1,
 395                          wxTreeItemData *data = NULL);
 396
 397         // insert a new item in as the first child of the parent
 398     wxTreeItemId PrependItem(const wxTreeItemId& parent,
 399                              const wxString& text,
 400                              int image = -1, int selectedImage = -1,
 401                              wxTreeItemData *data = NULL);
 402
 403         // insert a new item after a given one
 404     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 405                             const wxTreeItemId& idPrevious,
 406                             const wxString& text,
 407                             int image = -1, int selectedImage = -1,
 408                             wxTreeItemData *data = NULL);
 409
 410         // insert a new item in as the last child of the parent
 411     wxTreeItemId AppendItem(const wxTreeItemId& parent,
 412                             const wxString& text,
 413                             int image = -1, int selectedImage = -1,
 414                             wxTreeItemData *data = NULL);
 415
 416         // delete this item and associated data if any
 417     void Delete(const wxTreeItemId& item);
 418         // delete all children (but don't delete the item itself)
 419         // NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
 420     void DeleteChildren(const wxTreeItemId& item);
 421         // delete all items from the tree
 422         // NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
 423     void DeleteAllItems();
 424
 425         // expand this item
 426     void Expand(const wxTreeItemId& item);
 427         // collapse the item without removing its children
 428     void Collapse(const wxTreeItemId& item);
 429         // collapse the item and remove all children
 430     void CollapseAndReset(const wxTreeItemId& item);
 431         // toggles the current state
 432     void Toggle(const wxTreeItemId& item);
 433
 434         // remove the selection from currently selected item (if any)
 435     void Unselect();
 436     void UnselectAll();
 437         // select this item
 438     void SelectItem(const wxTreeItemId& item, bool unselect_others=TRUE, bool extended_select=FALSE);
 439         // make sure this item is visible (expanding the parent item and/or
 440         // scrolling to this item if necessary)
 441     void EnsureVisible(const wxTreeItemId& item);
 442         // scroll to this item (but don't expand its parent)
 443     void ScrollTo(const wxTreeItemId& item);
 444
 445         // The first function is more portable (because easier to implement
 446         // on other platforms), but the second one returns some extra info.
 447     wxTreeItemId HitTest(const wxPoint& point)
 448         { int dummy; return HitTest(point, dummy); }
 449     wxTreeItemId HitTest(const wxPoint& point, int& flags);
 450
 451         // start editing the item label: this (temporarily) replaces the item
 452         // with a one line edit control. The item will be selected if it hadn't
 453         // been before. textCtrlClass parameter allows you to create an edit
 454         // control of arbitrary user-defined class deriving from wxTextCtrl.
 455     wxTextCtrl* EditLabel(const wxTreeItemId& item,
 456                           wxClassInfo* textCtrlClass = CLASSINFO(wxTextCtrl));
 457         // returns the same pointer as StartEdit() if the item is being edited,
 458         // NULL otherwise (it's assumed that no more than one item may be
 459         // edited simultaneously)
 460     wxTextCtrl* GetEditControl() const;
 461         // end editing and accept or discard the changes to item label
 462     void EndEditLabel(const wxTreeItemId& item, bool discardChanges = FALSE);
 463
 464     // sorting
 465         // this function is called to compare 2 items and should return -1, 0
 466         // or +1 if the first item is less than, equal to or greater than the
 467         // second one. The base class version performs alphabetic comparaison
 468         // of item labels (GetText)
 469     virtual int OnCompareItems(const wxTreeItemId& item1,
 470                                const wxTreeItemId& item2);
 471         // sort the children of this item using OnCompareItems
 472         //
 473         // NB: this function is not reentrant and not MT-safe (FIXME)!
 474     void SortChildren(const wxTreeItemId& item);
 475
 476     // callbacks
 477     void OnPaint( wxPaintEvent &event );
 478     void OnSetFocus( wxFocusEvent &event );
 479     void OnKillFocus( wxFocusEvent &event );
 480     void OnChar( wxKeyEvent &event );
 481     void OnMouse( wxMouseEvent &event );
 482     void OnIdle( wxIdleEvent &event );
 483
 484     // implementation
 485     void SendDeleteEvent(wxGenericTreeItem *itemBeingDeleted);
 486
 487     // Draw Special Information
 488     void DrawBorder(wxTreeItemId& item);
 489     void DrawLine(wxTreeItemId& item, bool below);
 490
 491 protected:
 492     friend class wxGenericTreeItem;
 493
 494     wxGenericTreeItem   *m_anchor;
 495     wxGenericTreeItem   *m_current, *m_key_current;
 496     bool                 m_hasFocus;
 497     bool                 m_dirty;
 498     int                  m_xScroll,m_yScroll;
 499     unsigned int         m_indent;
 500     unsigned int         m_spacing;
 501     int                  m_lineHeight;
 502     wxPen                m_dottedPen;
 503     wxBrush             *m_hilightBrush;
 504     wxImageList         *m_imageListNormal,
 505                         *m_imageListState;
 506     int                  m_dragCount;
 507
 508     // the common part of all ctors
 509     void Init();
 510
 511     // misc helpers
 512     wxTreeItemId DoInsertItem(const wxTreeItemId& parent,
 513                               size_t previous,
 514                               const wxString& text,
 515                               int image, int selectedImage,
 516                               wxTreeItemData *data);
 517
 518     void AdjustMyScrollbars();
 519     int  GetLineHeight(wxGenericTreeItem *item) const;
 520     void PaintLevel( wxGenericTreeItem *item, wxDC& dc, int level, int &y );
 521     void PaintItem( wxGenericTreeItem *item, wxDC& dc);
 522
 523     void CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y );
 524     void CalculatePositions();
 525     void CalculateSize( wxGenericTreeItem *item, wxDC &dc );
 526
 527     void RefreshSubtree( wxGenericTreeItem *item );
 528     void RefreshLine( wxGenericTreeItem *item );
 529
 530     void FillArray(wxGenericTreeItem*, wxArrayTreeItemIds&) const;
 531     void SelectItemRange( wxGenericTreeItem *item1, wxGenericTreeItem *item2 );
 532     bool TagAllChildrenUntilLast(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select);
 533     bool TagNextChildren(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select);
 534     void UnselectAllChildren( wxGenericTreeItem *item );
 535
 536 private:
 537     DECLARE_EVENT_TABLE()
 538     DECLARE_DYNAMIC_CLASS(wxTreeCtrl)
 539 };
 540
 541 #endif // _GENERIC_TREECTRL_H_
 542