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 //those defines should only be done in generic/treectrl.h,
  35 //because wxMSW doesn't allow mutiple selection
  36
  37 #ifndef wxTR_SINGLE
  38 #define wxTR_SINGLE                 0x0000
  39 #define wxTR_MULTIPLE               0x0020
  40 #define wxTR_EXTENDED               0x0040
  41 #define wxTR_HAS_VARIABLE_ROW_HIGHT 0x0080
  42 #endif
  43
  44 // -----------------------------------------------------------------------------
  45 // constants
  46 // -----------------------------------------------------------------------------
  47
  48 // values for the `flags' parameter of wxTreeCtrl::HitTest() which determine
  49 // where exactly the specified point is situated:
  50
  51 static const int wxTREE_HITTEST_ABOVE            = 0x0001;
  52 static const int wxTREE_HITTEST_BELOW            = 0x0002;
  53 static const int wxTREE_HITTEST_NOWHERE          = 0x0004;
  54     // on the button associated with an item.
  55 static const int wxTREE_HITTEST_ONITEMBUTTON     = 0x0008;
  56     // on the bitmap associated with an item.
  57 static const int wxTREE_HITTEST_ONITEMICON       = 0x0010;
  58     // on the ident associated with an item.
  59 static const int wxTREE_HITTEST_ONITEMIDENT      = 0x0020;
  60     // on the label (string) associated with an item.
  61 static const int wxTREE_HITTEST_ONITEMLABEL      = 0x0040;
  62     // on the right of the label associated with an item.
  63 static const int wxTREE_HITTEST_ONITEMRIGHT      = 0x0080;
  64     // on the label (string) associated with an item.
  65 //static const int wxTREE_HITTEST_ONITEMSTATEICON  = 0x0100;
  66     // on the left of the wxTreeCtrl.
  67 static const int wxTREE_HITTEST_TOLEFT           = 0x0200;
  68     // on the right of the wxTreeCtrl.
  69 static const int wxTREE_HITTEST_TORIGHT          = 0x0400;
  70     // on the upper part (first half) of the item.
  71 static const int wxTREE_HITTEST_ONITEMUPPERPART  = 0x0800;
  72     // on the lower part (second half) of the item.
  73 static const int wxTREE_HITTEST_ONITEMLOWERPART  = 0x1000;
  74
  75     // anywhere on the item
  76 static const int wxTREE_HITTEST_ONITEM  = wxTREE_HITTEST_ONITEMICON |
  77                                           wxTREE_HITTEST_ONITEMLABEL;
  78
  79 // -----------------------------------------------------------------------------
  80 // forward declaration
  81 // -----------------------------------------------------------------------------
  82
  83 class wxImageList;
  84 class wxGenericTreeItem;
  85
  86 class wxTreeItemData;
  87
  88 // -----------------------------------------------------------------------------
  89 // wxTreeItemId - unique identifier of a tree element
  90 // -----------------------------------------------------------------------------
  91
  92 class WXDLLEXPORT wxTreeItemId
  93 {
  94 friend class wxTreeCtrl;
  95 friend class wxTreeEvent;
  96 public:
  97     // ctors
  98         // 0 is invalid value for HTREEITEM
  99     wxTreeItemId() { m_pItem = 0; }
 100
 101         // default copy ctor/assignment operator are ok for us
 102
 103     // accessors
 104         // is this a valid tree item?
 105     bool IsOk() const { return m_pItem != 0; }
 106
 107     // deprecated: only for compatibility
 108     wxTreeItemId(long itemId) { m_pItem = (wxGenericTreeItem *)itemId; }
 109     operator long() const { return (long)m_pItem; }
 110
 111 //protected: // not for gcc
 112     // for wxTreeCtrl usage only
 113     wxTreeItemId(wxGenericTreeItem *pItem) { m_pItem = pItem; }
 114
 115     wxGenericTreeItem *m_pItem;
 116 };
 117
 118 WX_DECLARE_OBJARRAY(wxTreeItemId, wxArrayTreeItemIds);
 119
 120 // ----------------------------------------------------------------------------
 121 // wxTreeItemData is some (arbitrary) user class associated with some item.
 122 //
 123 // Because the objects of this class are deleted by the tree, they should
 124 // always be allocated on the heap!
 125 // ----------------------------------------------------------------------------
 126 class WXDLLEXPORT wxTreeItemData: public wxClientData
 127 {
 128 friend class wxTreeCtrl;
 129 public:
 130     // creation/destruction
 131     // --------------------
 132         // default ctor
 133     wxTreeItemData() { }
 134
 135         // default copy ctor/assignment operator are ok
 136
 137     // accessor: get the item associated with us
 138     const wxTreeItemId& GetId() const { return m_pItem; }
 139     void SetId(const wxTreeItemId& id) { m_pItem = id; }
 140
 141 protected:
 142     wxTreeItemId m_pItem;
 143 };
 144
 145 // -----------------------------------------------------------------------------
 146 // wxTreeEvent - the event generated by the tree control
 147 // -----------------------------------------------------------------------------
 148 class WXDLLEXPORT wxTreeEvent : public wxNotifyEvent
 149 {
 150 friend class wxTreeCtrl;
 151 public:
 152     wxTreeEvent(wxEventType commandType = wxEVT_NULL, int id = 0);
 153
 154     // accessors
 155         // get the item on which the operation was performed or the newly
 156         // selected item for wxEVT_COMMAND_TREE_SEL_CHANGED/ING events
 157     wxTreeItemId GetItem() const { return m_item; }
 158
 159         // for wxEVT_COMMAND_TREE_SEL_CHANGED/ING events, get the previously
 160         // selected item
 161     wxTreeItemId GetOldItem() const { return m_itemOld; }
 162
 163         // the point where the mouse was when the drag operation started (for
 164         // wxEVT_COMMAND_TREE_BEGIN_(R)DRAG events only)
 165     wxPoint GetPoint() const { return m_pointDrag; }
 166
 167         // keyboard code (for wxEVT_COMMAND_TREE_KEY_DOWN only)
 168     int GetCode() const { return m_code; }
 169
 170     // set return code for wxEVT_COMMAND_TREE_ITEM_{EXPAND|COLLAPS}ING events
 171         // call this to forbid the change in item status
 172     void Veto() { m_code = TRUE; }
 173
 174         // for implementation usage only
 175     bool WasVetoed() const { return m_code; }
 176
 177 private:
 178     // @@ we could save some space by using union here
 179     int           m_code;
 180     wxTreeItemId  m_item,
 181                   m_itemOld;
 182     wxPoint       m_pointDrag;
 183
 184     DECLARE_DYNAMIC_CLASS(wxTreeEvent)
 185 };
 186
 187 typedef void (wxEvtHandler::*wxTreeEventFunction)(wxTreeEvent&);
 188
 189 // ----------------------------------------------------------------------------
 190 // macros for handling tree control events
 191 // ----------------------------------------------------------------------------
 192
 193 // GetItem() returns the item being dragged, GetPoint() the mouse coords
 194 #define EVT_TREE_BEGIN_DRAG(id, fn) { wxEVT_COMMAND_TREE_BEGIN_DRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 195 #define EVT_TREE_BEGIN_RDRAG(id, fn) { wxEVT_COMMAND_TREE_BEGIN_RDRAG, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 196
 197 // GetItem() returns the itme whose label is being edited
 198 #define EVT_TREE_BEGIN_LABEL_EDIT(id, fn) { wxEVT_COMMAND_TREE_BEGIN_LABEL_EDIT, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 199 #define EVT_TREE_END_LABEL_EDIT(id, fn) { wxEVT_COMMAND_TREE_END_LABEL_EDIT, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 200
 201 // provide/update information about GetItem() item
 202 #define EVT_TREE_GET_INFO(id, fn) { wxEVT_COMMAND_TREE_GET_INFO, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 203 #define EVT_TREE_SET_INFO(id, fn) { wxEVT_COMMAND_TREE_SET_INFO, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 204
 205 // GetItem() is the item being expanded/collapsed, the "ING" versions can use
 206 #define EVT_TREE_ITEM_EXPANDED(id, fn) { wxEVT_COMMAND_TREE_ITEM_EXPANDED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 207 #define EVT_TREE_ITEM_EXPANDING(id, fn) { wxEVT_COMMAND_TREE_ITEM_EXPANDING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 208 #define EVT_TREE_ITEM_COLLAPSED(id, fn) { wxEVT_COMMAND_TREE_ITEM_COLLAPSED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 209 #define EVT_TREE_ITEM_COLLAPSING(id, fn) { wxEVT_COMMAND_TREE_ITEM_COLLAPSING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 210
 211 // GetOldItem() is the item which had the selection previously, GetItem() is
 212 // the item which acquires selection
 213 #define EVT_TREE_SEL_CHANGED(id, fn) { wxEVT_COMMAND_TREE_SEL_CHANGED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 214 #define EVT_TREE_SEL_CHANGING(id, fn) { wxEVT_COMMAND_TREE_SEL_CHANGING, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 215
 216 // GetCode() returns the key code
 217 // NB: this is the only message for which GetItem() is invalid (you may get the
 218 //     item from GetSelection())
 219 #define EVT_TREE_KEY_DOWN(id, fn) { wxEVT_COMMAND_TREE_KEY_DOWN, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 220
 221 // GetItem() returns the item being deleted, the associated data (if any) will
 222 // be deleted just after the return of this event handler (if any)
 223 #define EVT_TREE_DELETE_ITEM(id, fn) { wxEVT_COMMAND_TREE_DELETE_ITEM, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, (wxObject *) NULL },
 224
 225 // GetItem() returns the item that was activated (double click, enter, space)
 226 #define EVT_TREE_ITEM_ACTIVATED(id, fn) { wxEVT_COMMAND_TREE_ITEM_ACTIVATED, id, -1, (wxObjectEventFunction) (wxEventFunction) (wxTreeEventFunction) & fn, NULL },
 227
 228 // -----------------------------------------------------------------------------
 229 // wxTreeCtrl - the tree control
 230 // -----------------------------------------------------------------------------
 231
 232 class WXDLLEXPORT wxTreeCtrl : public wxScrolledWindow
 233 {
 234 public:
 235     // creation
 236     // --------
 237     wxTreeCtrl() { Init(); }
 238
 239     wxTreeCtrl(wxWindow *parent, wxWindowID id = -1,
 240                const wxPoint& pos = wxDefaultPosition,
 241                const wxSize& size = wxDefaultSize,
 242                long style = wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT,
 243                const wxValidator &validator = wxDefaultValidator,
 244                const wxString& name = wxTreeCtrlNameStr)
 245     {
 246         Create(parent, id, pos, size, style, validator, name);
 247     }
 248
 249     virtual ~wxTreeCtrl();
 250
 251     bool Create(wxWindow *parent, wxWindowID id = -1,
 252                 const wxPoint& pos = wxDefaultPosition,
 253                 const wxSize& size = wxDefaultSize,
 254                 long style = wxTR_HAS_BUTTONS | wxTR_LINES_AT_ROOT,
 255                 const wxValidator &validator = wxDefaultValidator,
 256                 const wxString& name = wxTreeCtrlNameStr);
 257
 258     // accessors
 259     // ---------
 260
 261         // get the total number of items in the control
 262     size_t GetCount() const;
 263
 264         // indent is the number of pixels the children are indented relative to
 265         // the parents position. SetIndent() also redraws the control
 266         // immediately.
 267     unsigned int GetIndent() const { return m_indent; }
 268     void SetIndent(unsigned int indent);
 269
 270         // spacing is the number of pixels between the start and the Text
 271     unsigned int GetSpacing() const { return m_spacing; }
 272     void SetSpacing(unsigned int spacing);
 273
 274         // image list: these functions allow to associate an image list with
 275         // the control and retrieve it. Note that the control does _not_ delete
 276         // the associated image list when it's deleted in order to allow image
 277         // lists to be shared between different controls.
 278         //
 279         // The normal image list is for the icons which correspond to the
 280         // normal tree item state (whether it is selected or not).
 281         // Additionally, the application might choose to show a state icon
 282         // which corresponds to an app-defined item state (for example,
 283         // checked/unchecked) which are taken from the state image list.
 284     wxImageList *GetImageList() const;
 285     wxImageList *GetStateImageList() const;
 286
 287     void SetImageList(wxImageList *imageList);
 288     void SetStateImageList(wxImageList *imageList);
 289
 290     // Functions to work with tree ctrl items.
 291
 292     // accessors
 293     // ---------
 294
 295         // retrieve items label
 296     wxString GetItemText(const wxTreeItemId& item) const;
 297         // get the normal item image
 298     int GetItemImage(const wxTreeItemId& item) const;
 299         // get the selected item image
 300     int GetItemSelectedImage(const wxTreeItemId& item) const;
 301         // get the data associated with the item
 302     wxTreeItemData *GetItemData(const wxTreeItemId& item) const;
 303
 304     // modifiers
 305     // ---------
 306
 307         // set items label
 308     void SetItemText(const wxTreeItemId& item, const wxString& text);
 309         // set the normal item image
 310     void SetItemImage(const wxTreeItemId& item, int image);
 311         // set the selected item image
 312     void SetItemSelectedImage(const wxTreeItemId& item, int image);
 313         // associate some data with the item
 314     void SetItemData(const wxTreeItemId& item, wxTreeItemData *data);
 315
 316         // force appearance of [+] button near the item. This is useful to
 317         // allow the user to expand the items which don't have any children now
 318         // - but instead add them only when needed, thus minimizing memory
 319         // usage and loading time.
 320     void SetItemHasChildren(const wxTreeItemId& item, bool has = TRUE);
 321
 322         // the item will be shown in bold
 323     void SetItemBold(const wxTreeItemId& item, bool bold = TRUE);
 324
 325     // item status inquiries
 326     // ---------------------
 327
 328         // is the item visible (it might be outside the view or not expanded)?
 329     bool IsVisible(const wxTreeItemId& item) const;
 330         // does the item has any children?
 331     bool HasChildren(const wxTreeItemId& item) const
 332       { return ItemHasChildren(item); }
 333     bool ItemHasChildren(const wxTreeItemId& item) const;
 334         // is the item expanded (only makes sense if HasChildren())?
 335     bool IsExpanded(const wxTreeItemId& item) const;
 336         // is this item currently selected (the same as has focus)?
 337     bool IsSelected(const wxTreeItemId& item) const;
 338         // is item text in bold font?
 339     bool IsBold(const wxTreeItemId& item) const;
 340
 341     // number of children
 342     // ------------------
 343
 344         // if 'recursively' is FALSE, only immediate children count, otherwise
 345         // the returned number is the number of all items in this branch
 346     size_t GetChildrenCount(const wxTreeItemId& item, bool recursively = TRUE);
 347
 348     // navigation
 349     // ----------
 350
 351     // wxTreeItemId.IsOk() will return FALSE if there is no such item
 352
 353         // get the root tree item
 354     wxTreeItemId GetRootItem() const { return m_anchor; }
 355
 356         // get the item currently selected (may return NULL if no selection)
 357     wxTreeItemId GetSelection() const { return m_current; }
 358
 359         // get the items currently selected, return the number of such item
 360     size_t GetSelections(wxArrayTreeItemIds&) const;
 361
 362         // get the parent of this item (may return NULL if root)
 363     wxTreeItemId GetParent(const wxTreeItemId& item) const;
 364
 365         // for this enumeration function you must pass in a "cookie" parameter
 366         // which is opaque for the application but is necessary for the library
 367         // to make these functions reentrant (i.e. allow more than one
 368         // enumeration on one and the same object simultaneously). Of course,
 369         // the "cookie" passed to GetFirstChild() and GetNextChild() should be
 370         // the same!
 371
 372         // get the first child of this item
 373     wxTreeItemId GetFirstChild(const wxTreeItemId& item, long& cookie) const;
 374         // get the next child
 375     wxTreeItemId GetNextChild(const wxTreeItemId& item, long& cookie) const;
 376         // get the last child of this item - this method doesn't use cookies
 377     wxTreeItemId GetLastChild(const wxTreeItemId& item) const;
 378
 379         // get the next sibling of this item
 380     wxTreeItemId GetNextSibling(const wxTreeItemId& item) const;
 381         // get the previous sibling
 382     wxTreeItemId GetPrevSibling(const wxTreeItemId& item) const;
 383
 384         // get first visible item
 385     wxTreeItemId GetFirstVisibleItem() const;
 386         // get the next visible item: item must be visible itself!
 387         // see IsVisible() and wxTreeCtrl::GetFirstVisibleItem()
 388     wxTreeItemId GetNextVisible(const wxTreeItemId& item) const;
 389         // get the previous visible item: item must be visible itself!
 390     wxTreeItemId GetPrevVisible(const wxTreeItemId& item) const;
 391
 392     // operations
 393     // ----------
 394
 395         // add the root node to the tree
 396     wxTreeItemId AddRoot(const wxString& text,
 397                          int image = -1, int selectedImage = -1,
 398                          wxTreeItemData *data = NULL);
 399
 400         // insert a new item in as the first child of the parent
 401     wxTreeItemId PrependItem(const wxTreeItemId& parent,
 402                              const wxString& text,
 403                              int image = -1, int selectedImage = -1,
 404                              wxTreeItemData *data = NULL);
 405
 406         // insert a new item after a given one
 407     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 408                             const wxTreeItemId& idPrevious,
 409                             const wxString& text,
 410                             int image = -1, int selectedImage = -1,
 411                             wxTreeItemData *data = NULL);
 412
 413         // insert a new item in as the last child of the parent
 414     wxTreeItemId AppendItem(const wxTreeItemId& parent,
 415                             const wxString& text,
 416                             int image = -1, int selectedImage = -1,
 417                             wxTreeItemData *data = NULL);
 418
 419         // delete this item and associated data if any
 420     void Delete(const wxTreeItemId& item);
 421         // delete all children (but don't delete the item itself)
 422         // NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
 423     void DeleteChildren(const wxTreeItemId& item);
 424         // delete all items from the tree
 425         // NB: this won't send wxEVT_COMMAND_TREE_ITEM_DELETED events
 426     void DeleteAllItems();
 427
 428         // expand this item
 429     void Expand(const wxTreeItemId& item);
 430         // collapse the item without removing its children
 431     void Collapse(const wxTreeItemId& item);
 432         // collapse the item and remove all children
 433     void CollapseAndReset(const wxTreeItemId& item);
 434         // toggles the current state
 435     void Toggle(const wxTreeItemId& item);
 436
 437         // remove the selection from currently selected item (if any)
 438     void Unselect();
 439     void UnselectAll();
 440         // select this item
 441     void SelectItem(const wxTreeItemId& item, bool unselect_others=TRUE, bool extended_select=FALSE);
 442         // make sure this item is visible (expanding the parent item and/or
 443         // scrolling to this item if necessary)
 444     void EnsureVisible(const wxTreeItemId& item);
 445         // scroll to this item (but don't expand its parent)
 446     void ScrollTo(const wxTreeItemId& item);
 447
 448         // The first function is more portable (because easier to implement
 449         // on other platforms), but the second one returns some extra info.
 450     wxTreeItemId HitTest(const wxPoint& point)
 451         { int dummy; return HitTest(point, dummy); }
 452     wxTreeItemId HitTest(const wxPoint& point, int& flags);
 453
 454         // start editing the item label: this (temporarily) replaces the item
 455         // with a one line edit control. The item will be selected if it hadn't
 456         // been before. textCtrlClass parameter allows you to create an edit
 457         // control of arbitrary user-defined class deriving from wxTextCtrl.
 458     wxTextCtrl* EditLabel(const wxTreeItemId& item,
 459                           wxClassInfo* textCtrlClass = CLASSINFO(wxTextCtrl));
 460         // returns the same pointer as StartEdit() if the item is being edited,
 461         // NULL otherwise (it's assumed that no more than one item may be
 462         // edited simultaneously)
 463     wxTextCtrl* GetEditControl() const;
 464         // end editing and accept or discard the changes to item label
 465     void EndEditLabel(const wxTreeItemId& item, bool discardChanges = FALSE);
 466
 467     // sorting
 468         // this function is called to compare 2 items and should return -1, 0
 469         // or +1 if the first item is less than, equal to or greater than the
 470         // second one. The base class version performs alphabetic comparaison
 471         // of item labels (GetText)
 472     virtual int OnCompareItems(const wxTreeItemId& item1,
 473                                const wxTreeItemId& item2);
 474         // sort the children of this item using OnCompareItems
 475         //
 476         // NB: this function is not reentrant and not MT-safe (FIXME)!
 477     void SortChildren(const wxTreeItemId& item);
 478
 479     // callbacks
 480     void OnPaint( wxPaintEvent &event );
 481     void OnSetFocus( wxFocusEvent &event );
 482     void OnKillFocus( wxFocusEvent &event );
 483     void OnChar( wxKeyEvent &event );
 484     void OnMouse( wxMouseEvent &event );
 485     void OnIdle( wxIdleEvent &event );
 486
 487     // implementation
 488     void SendDeleteEvent(wxGenericTreeItem *itemBeingDeleted);
 489
 490     // Draw Special Information
 491     void DrawBorder(wxTreeItemId& item);
 492     void DrawLine(wxTreeItemId& item, bool below);
 493
 494 protected:
 495     friend class wxGenericTreeItem;
 496
 497     wxGenericTreeItem   *m_anchor;
 498     wxGenericTreeItem   *m_current, *m_key_current;
 499     bool                 m_hasFocus;
 500     bool                 m_dirty;
 501     int                  m_xScroll,m_yScroll;
 502     unsigned int         m_indent;
 503     unsigned int         m_spacing;
 504     int                  m_lineHeight;
 505     wxPen                m_dottedPen;
 506     wxBrush             *m_hilightBrush;
 507     wxImageList         *m_imageListNormal,
 508                         *m_imageListState;
 509     int                  m_dragCount;
 510
 511     // the common part of all ctors
 512     void Init();
 513
 514     // misc helpers
 515     wxTreeItemId DoInsertItem(const wxTreeItemId& parent,
 516                               size_t previous,
 517                               const wxString& text,
 518                               int image, int selectedImage,
 519                               wxTreeItemData *data);
 520
 521     void AdjustMyScrollbars();
 522     int  GetLineHeight(wxGenericTreeItem *item) const;
 523     void PaintLevel( wxGenericTreeItem *item, wxDC& dc, int level, int &y );
 524     void PaintItem( wxGenericTreeItem *item, wxDC& dc);
 525
 526     void CalculateLevel( wxGenericTreeItem *item, wxDC &dc, int level, int &y );
 527     void CalculatePositions();
 528     void CalculateSize( wxGenericTreeItem *item, wxDC &dc );
 529
 530     void RefreshSubtree( wxGenericTreeItem *item );
 531     void RefreshLine( wxGenericTreeItem *item );
 532
 533     void FillArray(wxGenericTreeItem*, wxArrayTreeItemIds&) const;
 534     void SelectItemRange( wxGenericTreeItem *item1, wxGenericTreeItem *item2 );
 535     bool TagAllChildrenUntilLast(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select);
 536     bool TagNextChildren(wxGenericTreeItem *crt_item, wxGenericTreeItem *last_item, bool select);
 537     void UnselectAllChildren( wxGenericTreeItem *item );
 538
 539 private:
 540     DECLARE_EVENT_TABLE()
 541     DECLARE_DYNAMIC_CLASS(wxTreeCtrl)
 542 };
 543
 544 #endif // _GENERIC_TREECTRL_H_
 545