interface/treectrl.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        treectrl.h
   3 // Purpose:     interface of wxTreeItemData
   4 // Author:      wxWidgets team
   5 // RCS-ID:      $Id$
   6 // Licence:     wxWindows license
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 /**
  10     @class wxTreeItemData
  11     @wxheader{treectrl.h}
  12
  13     wxTreeItemData is some (arbitrary) user class associated with some item. The
  14     main advantage of having this class is that wxTreeItemData objects are
  15     destroyed automatically by the tree and, as this class has virtual destructor,
  16     it means that the memory and any other resources associated with a tree item
  17     will be automatically freed when it is deleted. Note that we don't use wxObject
  18     as the base class for wxTreeItemData because the size of this class is
  19     critical: in many applications, each tree leaf will have wxTreeItemData
  20     associated with it and the number of leaves may be quite big.
  21
  22     Also please note that because the objects of this class are deleted by the tree
  23     using the operator @c delete, they must always be allocated on the heap
  24     using @c new.
  25
  26     @library{wxcore}
  27     @category{FIXME}
  28
  29     @see wxTreeCtrl
  30 */
  31 class wxTreeItemData : public wxClientData
  32 {
  33 public:
  34     /**
  35         Default constructor.
  36
  37         In addition, the following methods are added in wxPython for accessing
  38         the object:
  39
  40         @b GetData()
  41
  42         Returns a reference to the Python Object
  43
  44         @b SetData(obj)
  45
  46         Associates a new Python Object with the
  47         wxTreeItemData
  48     */
  49     wxTreeItemData();
  50
  51     /**
  52         Virtual destructor.
  53     */
  54     ~wxTreeItemData();
  55
  56     /**
  57         Returns the item associated with this node.
  58     */
  59     const wxTreeItemId GetId();
  60
  61     /**
  62         Sets the item associated with this node.
  63     */
  64     void SetId(const wxTreeItemId& id);
  65 };
  66
  67
  68
  69 /**
  70     @class wxTreeCtrl
  71     @wxheader{treectrl.h}
  72
  73     A tree control presents information as a hierarchy, with items that may be
  74     expanded
  75     to show further items. Items in a tree control are referenced by wxTreeItemId
  76     handles,
  77     which may be tested for validity by calling wxTreeItemId::IsOk.
  78
  79     To intercept events from a tree control, use the event table macros described
  80     in wxTreeEvent.
  81
  82     @beginStyleTable
  83     @style{wxTR_EDIT_LABELS}:
  84            Use this style if you wish the user to be able to edit labels in
  85            the tree control.
  86     @style{wxTR_NO_BUTTONS}:
  87            For convenience to document that no buttons are to be drawn.
  88     @style{wxTR_HAS_BUTTONS}:
  89            Use this style to show + and - buttons to the left of parent items.
  90     @style{wxTR_NO_LINES}:
  91            Use this style to hide vertical level connectors.
  92     @style{wxTR_FULL_ROW_HIGHLIGHT}:
  93            Use this style to have the background colour and the selection
  94            highlight extend over the entire horizontal row of the tree control
  95            window. (This flag is ignored under Windows unless you specify
  96            wxTR_NO_LINES as well.)
  97     @style{wxTR_LINES_AT_ROOT}:
  98            Use this style to show lines between root nodes. Only applicable if
  99            wxTR_HIDE_ROOT is set and wxTR_NO_LINES is not set.
 100     @style{wxTR_HIDE_ROOT}:
 101            Use this style to suppress the display of the root node,
 102            effectively causing the first-level nodes to appear as a series of
 103            root nodes.
 104     @style{wxTR_ROW_LINES}:
 105            Use this style to draw a contrasting border between displayed rows.
 106     @style{wxTR_HAS_VARIABLE_ROW_HEIGHT}:
 107            Use this style to cause row heights to be just big enough to fit
 108            the content. If not set, all rows use the largest row height. The
 109            default is that this flag is unset. Generic only.
 110     @style{wxTR_SINGLE}:
 111            For convenience to document that only one item may be selected at a
 112            time. Selecting another item causes the current selection, if any,
 113            to be deselected.  This is the default.
 114     @style{wxTR_MULTIPLE}:
 115            Use this style to allow a range of items to be selected. If a
 116            second range is selected, the current range, if any, is deselected.
 117     @style{wxTR_DEFAULT_STYLE}:
 118            The set of flags that are closest to the defaults for the native
 119            control for a particular toolkit.
 120     @endStyleTable
 121
 122     @library{wxcore}
 123     @category{ctrl}
 124     @appearance{treectrl.png}
 125
 126     @see wxTreeItemData, @ref overview_wxtreectrloverview "wxTreeCtrl overview",
 127     wxListBox, wxListCtrl, wxImageList, wxTreeEvent
 128 */
 129 class wxTreeCtrl : public wxControl
 130 {
 131 public:
 132     //@{
 133     /**
 134         Constructor, creating and showing a tree control.
 135
 136         @param parent
 137             Parent window. Must not be @NULL.
 138         @param id
 139             Window identifier. The value wxID_ANY indicates a default value.
 140         @param pos
 141             Window position.
 142         @param size
 143             Window size. If wxDefaultSize is specified then the window is
 144         sized
 145             appropriately.
 146         @param style
 147             Window style. See wxTreeCtrl.
 148         @param validator
 149             Window validator.
 150         @param name
 151             Window name.
 152
 153         @see Create(), wxValidator
 154     */
 155     wxTreeCtrl();
 156     wxTreeCtrl(wxWindow* parent, wxWindowID id,
 157                const wxPoint& pos = wxDefaultPosition,
 158                const wxSize& size = wxDefaultSize,
 159                long style = wxTR_HAS_BUTTONS,
 160                const wxValidator& validator = wxDefaultValidator,
 161                const wxString& name = "treeCtrl");
 162     //@}
 163
 164     /**
 165         Destructor, destroying the tree control.
 166     */
 167     ~wxTreeCtrl();
 168
 169     /**
 170         Adds the root node to the tree, returning the new item.
 171         The @a image and @a selImage parameters are an index within
 172         the normal image list specifying the image to use for unselected and
 173         selected items, respectively.
 174         If @a image  -1 and @a selImage is -1, the same image is used for
 175         both selected and unselected items.
 176     */
 177     wxTreeItemId AddRoot(const wxString& text, int image = -1,
 178                          int selImage = -1,
 179                          wxTreeItemData* data = NULL);
 180
 181     /**
 182         Appends an item to the end of the branch identified by @e parent, return a new
 183         item id.
 184         The @a image and @a selImage parameters are an index within
 185         the normal image list specifying the image to use for unselected and
 186         selected items, respectively.
 187         If @a image  -1 and @a selImage is -1, the same image is used for
 188         both selected and unselected items.
 189     */
 190     wxTreeItemId AppendItem(const wxTreeItemId& parent,
 191                             const wxString& text,
 192                             int image = -1,
 193                             int selImage = -1,
 194                             wxTreeItemData* data = NULL);
 195
 196     /**
 197         Sets the buttons image list. The button images assigned with this method will
 198         be automatically deleted by wxTreeCtrl as appropriate
 199         (i.e. it takes ownership of the list).
 200         Setting or assigning the button image list enables the display of image buttons.
 201         Once enabled, the only way to disable the display of button images is to set
 202         the button image list to @NULL.
 203         This function is only available in the generic version.
 204         See also SetButtonsImageList().
 205     */
 206     void AssignButtonsImageList(wxImageList* imageList);
 207
 208     /**
 209         Sets the normal image list. Image list assigned with this method will
 210         be automatically deleted by wxTreeCtrl as appropriate
 211         (i.e. it takes ownership of the list).
 212         See also SetImageList().
 213     */
 214     void AssignImageList(wxImageList* imageList);
 215
 216     /**
 217         Sets the state image list. Image list assigned with this method will
 218         be automatically deleted by wxTreeCtrl as appropriate
 219         (i.e. it takes ownership of the list).
 220         See also SetStateImageList().
 221     */
 222     void AssignStateImageList(wxImageList* imageList);
 223
 224     /**
 225         Collapses the given item.
 226     */
 227     void Collapse(const wxTreeItemId& item);
 228
 229     /**
 230         Collapses the root item.
 231
 232         @see ExpandAll()
 233     */
 234     void CollapseAll();
 235
 236     /**
 237         Collapses this item and all of its children, recursively.
 238
 239         @see ExpandAllChildren()
 240     */
 241     void CollapseAllChildren(const wxTreeItemId& item);
 242
 243     /**
 244         Collapses the given item and removes all children.
 245     */
 246     void CollapseAndReset(const wxTreeItemId& item);
 247
 248     /**
 249         Creates the tree control. See wxTreeCtrl() for further details.
 250     */
 251     bool wxTreeCtrl(wxWindow* parent, wxWindowID id,
 252                     const wxPoint& pos = wxDefaultPosition,
 253                     const wxSize& size = wxDefaultSize,
 254                     long style = wxTR_HAS_BUTTONS,
 255                     const wxValidator& validator = wxDefaultValidator,
 256                     const wxString& name = "treeCtrl");
 257
 258     /**
 259         Deletes the specified item. A @c EVT_TREE_DELETE_ITEM event will be
 260         generated.
 261         This function may cause a subsequent call to GetNextChild to fail.
 262     */
 263     void Delete(const wxTreeItemId& item);
 264
 265     /**
 266         Deletes all items in the control. Note that this may not generate
 267         @c EVT_TREE_DELETE_ITEM events under some Windows versions although
 268         normally such event is generated for each removed item.
 269     */
 270     void DeleteAllItems();
 271
 272     /**
 273         Deletes all children of the given item (but not the item itself). Note that
 274         this will @b not generate any events unlike
 275         Delete() method.
 276         If you have called SetItemHasChildren(), you
 277         may need to call it again since @e DeleteChildren does not automatically
 278         clear the setting.
 279     */
 280     void DeleteChildren(const wxTreeItemId& item);
 281
 282     /**
 283         Starts editing the label of the given item. This function generates a
 284         EVT_TREE_BEGIN_LABEL_EDIT event which can be vetoed so that no
 285         text control will appear for in-place editing.
 286         If the user changed the label (i.e. s/he does not press ESC or leave
 287         the text control without changes, a EVT_TREE_END_LABEL_EDIT event
 288         will be sent which can be vetoed as well.
 289
 290         @see EndEditLabel(), wxTreeEvent
 291     */
 292     void EditLabel(const wxTreeItemId& item);
 293
 294     /**
 295         Ends label editing. If @a cancelEdit is @true, the edit will be cancelled.
 296         This function is currently supported under Windows only.
 297
 298         @see EditLabel()
 299     */
 300     void EndEditLabel(bool cancelEdit);
 301
 302     /**
 303         Scrolls and/or expands items to ensure that the given item is visible.
 304     */
 305     void EnsureVisible(const wxTreeItemId& item);
 306
 307     /**
 308         Expands the given item.
 309     */
 310     void Expand(const wxTreeItemId& item);
 311
 312     /**
 313         Expands all items in the tree.
 314     */
 315     void ExpandAll();
 316
 317     /**
 318         Expands the given item and all its children recursively.
 319     */
 320     void ExpandAllChildren(const wxTreeItemId& item);
 321
 322     /**
 323         Retrieves the rectangle bounding the @e item. If @a textOnly is @true,
 324         only the rectangle around the item's label will be returned, otherwise the
 325         item's image is also taken into account.
 326         The return value is @true if the rectangle was successfully retrieved or @c
 327         @false
 328         if it was not (in this case @a rect is not changed) -- for example, if the
 329         item is currently invisible.
 330         Notice that the rectangle coordinates are logical, not physical ones. So, for
 331         example, the x coordinate may be negative if the tree has a horizontal
 332         scrollbar and its position is not 0.
 333     */
 334     bool GetBoundingRect(const wxTreeItemId& item, wxRect& rect,
 335                          bool textOnly = false) const;
 336
 337     /**
 338         Returns the buttons image list (from which application-defined button images
 339         are taken).
 340         This function is only available in the generic version.
 341     */
 342     wxImageList* GetButtonsImageList() const;
 343
 344     /**
 345         Returns the number of items in the branch. If @a recursively is @true,
 346         returns the total number
 347         of descendants, otherwise only one level of children is counted.
 348     */
 349     unsigned int GetChildrenCount(const wxTreeItemId& item,
 350                                   bool recursively = true) const;
 351
 352     /**
 353         Returns the number of items in the control.
 354     */
 355     unsigned int GetCount() const;
 356
 357     /**
 358         Returns the edit control being currently used to edit a label. Returns @NULL
 359         if no label is being edited.
 360         @note It is currently only implemented for wxMSW.
 361     */
 362     wxTextCtrl* GetEditControl() const;
 363
 364     /**
 365         Returns the first child; call GetNextChild() for the next child.
 366         For this enumeration function you must pass in a 'cookie' parameter
 367         which is opaque for the application but is necessary for the library
 368         to make these functions reentrant (i.e. allow more than one
 369         enumeration on one and the same object simultaneously). The cookie passed to
 370         GetFirstChild and GetNextChild should be the same variable.
 371         Returns an invalid tree item (i.e. IsOk() returns @false) if there are no
 372         further children.
 373
 374         @see GetNextChild(), GetNextSibling()
 375     */
 376     wxTreeItemId GetFirstChild(const wxTreeItemId& item,
 377                                wxTreeItemIdValue& cookie) const;
 378
 379     /**
 380         Returns the first visible item.
 381     */
 382     wxTreeItemId GetFirstVisibleItem() const;
 383
 384     /**
 385         Returns the normal image list.
 386     */
 387     wxImageList* GetImageList() const;
 388
 389     /**
 390         Returns the current tree control indentation.
 391     */
 392     int GetIndent() const;
 393
 394     /**
 395         Returns the background colour of the item.
 396     */
 397     wxColour GetItemBackgroundColour(const wxTreeItemId& item) const;
 398
 399     //@{
 400     /**
 401         Returns the font of the item label.
 402
 403         @see wxTreeItemData
 404
 405         @beginWxPythonOnly
 406         wxPython provides the following shortcut method:
 407         @li GetPyData(item): Returns the Python Object associated with the
 408             wxTreeItemData for the given item Id.
 409         @endWxPythonOnly
 410     */
 411     wxTreeItemData* GetItemData(const wxTreeItemId& item) const;
 412     wxFont  GetItemFont(const wxTreeItemId& item) const;
 413     //@}
 414
 415     /**
 416         Gets the specified item image. The value of @a which may be:
 417         wxTreeItemIcon_Normal to get the normal item image
 418         wxTreeItemIcon_Selected to get the selected item image (i.e. the image
 419         which is shown when the item is currently selected)
 420         wxTreeItemIcon_Expanded to get the expanded image (this only
 421         makes sense for items which have children - then this image is shown when the
 422         item is expanded and the normal image is shown when it is collapsed)
 423         wxTreeItemIcon_SelectedExpanded to get the selected expanded image
 424         (which is shown when an expanded item is currently selected)
 425     */
 426     int GetItemImage(const wxTreeItemId& item,
 427                      wxTreeItemIcon which = wxTreeItemIcon_Normal) const;
 428
 429     /**
 430         Returns the item's parent.
 431     */
 432     wxTreeItemId GetItemParent(const wxTreeItemId& item) const;
 433
 434     /**
 435         Gets the selected item image (this function is obsolete, use
 436         @c GetItemImage(item, wxTreeItemIcon_Selected) instead).
 437     */
 438     int GetItemSelectedImage(const wxTreeItemId& item) const;
 439
 440     /**
 441         Returns the item label.
 442     */
 443     wxString GetItemText(const wxTreeItemId& item) const;
 444
 445     /**
 446         Returns the colour of the item label.
 447     */
 448     wxColour GetItemTextColour(const wxTreeItemId& item) const;
 449
 450     /**
 451         Returns the last child of the item (or an invalid tree item if this item has no
 452         children).
 453
 454         @see GetFirstChild(), GetNextSibling(),
 455              GetLastChild()
 456     */
 457     wxTreeItemId GetLastChild(const wxTreeItemId& item) const;
 458
 459     /**
 460         Returns the next child; call GetFirstChild() for the first child.
 461         For this enumeration function you must pass in a 'cookie' parameter
 462         which is opaque for the application but is necessary for the library
 463         to make these functions reentrant (i.e. allow more than one
 464         enumeration on one and the same object simultaneously). The cookie passed to
 465         GetFirstChild and GetNextChild should be the same.
 466         Returns an invalid tree item if there are no further children.
 467
 468         @see GetFirstChild()
 469     */
 470     wxTreeItemId GetNextChild(const wxTreeItemId& item,
 471                               wxTreeItemIdValue& cookie) const;
 472
 473     /**
 474         Returns the next sibling of the specified item; call GetPrevSibling() for the
 475         previous sibling.
 476         Returns an invalid tree item if there are no further siblings.
 477
 478         @see GetPrevSibling()
 479     */
 480     wxTreeItemId GetNextSibling(const wxTreeItemId& item) const;
 481
 482     /**
 483         Returns the next visible item or an invalid item if this item is the last
 484         visible one.
 485         Notice that the @a item itself must be visible.
 486     */
 487     wxTreeItemId GetNextVisible(const wxTreeItemId& item) const;
 488
 489     /**
 490         Returns the previous sibling of the specified item; call GetNextSibling() for
 491         the next sibling.
 492         Returns an invalid tree item if there are no further children.
 493
 494         @see GetNextSibling()
 495     */
 496     wxTreeItemId GetPrevSibling(const wxTreeItemId& item) const;
 497
 498     /**
 499         Returns the previous visible item or an invalid item if this item is the first
 500         visible one.
 501         Notice that the @a item itself must be visible.
 502     */
 503     wxTreeItemId GetPrevVisible(const wxTreeItemId& item) const;
 504
 505     /**
 506         Returns @true if the control will use a quick calculation for the best size,
 507         looking only at the first and last items. The default is @false.
 508
 509         @see SetQuickBestSize()
 510     */
 511     bool GetQuickBestSize() const;
 512
 513     /**
 514         Returns the root item for the tree control.
 515     */
 516     wxTreeItemId GetRootItem() const;
 517
 518     /**
 519         Returns the selection, or an invalid item if there is no selection.
 520         This function only works with the controls without wxTR_MULTIPLE style, use
 521         GetSelections() for the controls which do have
 522         this style.
 523     */
 524     wxTreeItemId GetSelection() const;
 525
 526     /**
 527         Fills the array of tree items passed in with the currently selected items. This
 528         function can be called only if the control has the wxTR_MULTIPLE style.
 529         Returns the number of selected items.
 530     */
 531     unsigned int GetSelections(wxArrayTreeItemIds& selection) const;
 532
 533     /**
 534         Returns the state image list (from which application-defined state images are
 535         taken).
 536     */
 537     wxImageList* GetStateImageList() const;
 538
 539     /**
 540         Calculates which (if any) item is under the given point, returning the tree item
 541         id at this point plus extra information @e flags. @a flags is a bitlist of the
 542         following:
 543
 544         wxTREE_HITTEST_ABOVE
 545
 546         Above the client area.
 547
 548         wxTREE_HITTEST_BELOW
 549
 550         Below the client area.
 551
 552         wxTREE_HITTEST_NOWHERE
 553
 554         In the client area but below the last item.
 555
 556         wxTREE_HITTEST_ONITEMBUTTON
 557
 558         On the button associated with an item.
 559
 560         wxTREE_HITTEST_ONITEMICON
 561
 562         On the bitmap associated with an item.
 563
 564         wxTREE_HITTEST_ONITEMINDENT
 565
 566         In the indentation associated with an item.
 567
 568         wxTREE_HITTEST_ONITEMLABEL
 569
 570         On the label (string) associated with an item.
 571
 572         wxTREE_HITTEST_ONITEMRIGHT
 573
 574         In the area to the right of an item.
 575
 576         wxTREE_HITTEST_ONITEMSTATEICON
 577
 578         On the state icon for a tree view item that is in a user-defined state.
 579
 580         wxTREE_HITTEST_TOLEFT
 581
 582         To the right of the client area.
 583
 584         wxTREE_HITTEST_TORIGHT
 585
 586         To the left of the client area.
 587     */
 588     wxTreeItemId HitTest(const wxPoint& point, int& flags) const;
 589
 590     //@{
 591     /**
 592         Inserts an item after a given one (@e previous) or before one identified by its
 593         position (@e before).
 594         @a before must be less than the number of children.
 595         The @a image and @a selImage parameters are an index within
 596         the normal image list specifying the image to use for unselected and
 597         selected items, respectively.
 598         If @a image  -1 and @a selImage is -1, the same image is used for
 599         both selected and unselected items.
 600     */
 601     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 602                             const wxTreeItemId& previous,
 603                             const wxString& text,
 604                             int image = -1,
 605                             int selImage = -1,
 606                             wxTreeItemData* data = NULL);
 607     wxTreeItemId InsertItem(const wxTreeItemId& parent,
 608                             size_t before,
 609                             const wxString& text,
 610                             int image = -1,
 611                             int selImage = -1,
 612                             wxTreeItemData* data = NULL);
 613     //@}
 614
 615     /**
 616         Returns @true if the given item is in bold state.
 617         See also: SetItemBold()
 618     */
 619     bool IsBold(const wxTreeItemId& item) const;
 620
 621     /**
 622         Returns @true if the control is empty (i.e. has no items, even no root one).
 623     */
 624     bool IsEmpty() const;
 625
 626     /**
 627         Returns @true if the item is expanded (only makes sense if it has children).
 628     */
 629     bool IsExpanded(const wxTreeItemId& item) const;
 630
 631     /**
 632         Returns @true if the item is selected.
 633     */
 634     bool IsSelected(const wxTreeItemId& item) const;
 635
 636     /**
 637         Returns @true if the item is visible on the screen.
 638     */
 639     bool IsVisible(const wxTreeItemId& item) const;
 640
 641     /**
 642         Returns @true if the item has children.
 643     */
 644     bool ItemHasChildren(const wxTreeItemId& item) const;
 645
 646     /**
 647         Override this function in the derived class to change the sort order of the
 648         items in the tree control. The function should return a negative, zero or
 649         positive value if the first item is less than, equal to or greater than the
 650         second one.
 651         Please note that you @b must use wxRTTI macros
 652         DECLARE_DYNAMIC_CLASS() and
 653         IMPLEMENT_DYNAMIC_CLASS() if you override this
 654         function because otherwise the base class considers that it is not overridden
 655         and uses the default comparison, i.e. sorts the items alphabetically, which
 656         allows it optimize away the calls to the virtual function completely.
 657         See also: SortChildren()
 658     */
 659     int OnCompareItems(const wxTreeItemId& item1,
 660                        const wxTreeItemId& item2);
 661
 662     /**
 663         Appends an item as the first child of @e parent, return a new item id.
 664         The @a image and @a selImage parameters are an index within
 665         the normal image list specifying the image to use for unselected and
 666         selected items, respectively.
 667         If @a image  -1 and @a selImage is -1, the same image is used for
 668         both selected and unselected items.
 669     */
 670     wxTreeItemId PrependItem(const wxTreeItemId& parent,
 671                              const wxString& text,
 672                              int image = -1,
 673                              int selImage = -1,
 674                              wxTreeItemData* data = NULL);
 675
 676     /**
 677         Scrolls the specified item into view.
 678     */
 679     void ScrollTo(const wxTreeItemId& item);
 680
 681     /**
 682         Selects the given item. In multiple selection controls, can be also used to
 683         deselect a currently selected item if the value of @a select is @false.
 684     */
 685     void SelectItem(const wxTreeItemId& item, bool select = true);
 686
 687     /**
 688         Sets the buttons image list (from which application-defined button images are
 689         taken).
 690         The button images assigned with this method will
 691         @b not be deleted by wxTreeCtrl's destructor, you must delete it yourself.
 692         Setting or assigning the button image list enables the display of image buttons.
 693         Once enabled, the only way to disable the display of button images is to set
 694         the button image list to @NULL.
 695         This function is only available in the generic version.
 696         See also AssignButtonsImageList().
 697     */
 698     void SetButtonsImageList(wxImageList* imageList);
 699
 700     /**
 701         Sets the normal image list. Image list assigned with this method will
 702         @b not be deleted by wxTreeCtrl's destructor, you must delete it yourself.
 703         See also AssignImageList().
 704     */
 705     void SetImageList(wxImageList* imageList);
 706
 707     /**
 708         Sets the indentation for the tree control.
 709     */
 710     void SetIndent(int indent);
 711
 712     /**
 713         Sets the colour of the item's background.
 714     */
 715     void SetItemBackgroundColour(const wxTreeItemId& item,
 716                                  const wxColour& col);
 717
 718     /**
 719         Makes item appear in bold font if @a bold parameter is @true or resets it to
 720         the normal state.
 721         See also: IsBold()
 722     */
 723     void SetItemBold(const wxTreeItemId& item, bool bold = true);
 724
 725     //@{
 726     /**
 727         Gives the item the visual feedback for Drag'n'Drop actions, which is
 728         useful if something is dragged from the outside onto the tree control
 729         (as opposed to a DnD operation within the tree control, which already
 730         is implemented internally).
 731     */
 732     void SetItemData(const wxTreeItemId& item, wxTreeItemData* data);
 733 wxPython note:
 734     SetPyData(item, obj)
 735
 736
 737
 738
 739     Associate the given Python
 740     Object with the wxTreeItemData for the given item Id.
 741
 742
 743
 744
 745
 746
 747
 748     void SetItemDropHighlight(const wxTreeItemId& item,
 749                               bool highlight = true);
 750     //@}
 751
 752     /**
 753         Sets the item's font. All items in the tree should have the same height to avoid
 754         text clipping, so the fonts height should be the same for all of them,
 755         although font attributes may vary.
 756
 757         @see SetItemBold()
 758     */
 759     void SetItemFont(const wxTreeItemId& item, const wxFont& font);
 760
 761     /**
 762         Force appearance of the button next to the item. This is useful to
 763         allow the user to expand the items which don't have any children now,
 764         but instead adding them only when needed, thus minimizing memory
 765         usage and loading time.
 766     */
 767     void SetItemHasChildren(const wxTreeItemId& item,
 768                             bool hasChildren = true);
 769
 770     /**
 771         Sets the specified item image. See GetItemImage()
 772         for the description of the @a which parameter.
 773     */
 774     void SetItemImage(const wxTreeItemId& item, int image,
 775                       wxTreeItemIcon which = wxTreeItemIcon_Normal);
 776
 777     /**
 778         Sets the selected item image (this function is obsolete, use
 779         @c SetItemImage(item, wxTreeItemIcon_Selected) instead).
 780     */
 781     void SetItemSelectedImage(const wxTreeItemId& item, int selImage);
 782
 783     /**
 784         Sets the item label.
 785     */
 786     void SetItemText(const wxTreeItemId& item, const wxString& text);
 787
 788     /**
 789         Sets the colour of the item's text.
 790     */
 791     void SetItemTextColour(const wxTreeItemId& item,
 792                            const wxColour& col);
 793
 794     /**
 795         If @true is passed, specifies that the control will use a quick calculation for
 796         the best size,
 797         looking only at the first and last items. Otherwise, it will look at all items.
 798         The default is @false.
 799
 800         @see GetQuickBestSize()
 801     */
 802     void SetQuickBestSize(bool quickBestSize);
 803
 804     /**
 805         Sets the state image list (from which application-defined state images are
 806         taken).
 807         Image list assigned with this method will
 808         @b not be deleted by wxTreeCtrl's destructor, you must delete it yourself.
 809         See also AssignStateImageList().
 810     */
 811     void SetStateImageList(wxImageList* imageList);
 812
 813     /**
 814         Sets the mode flags associated with the display of the tree control.
 815         The new mode takes effect immediately.
 816         (Generic only; MSW ignores changes.)
 817     */
 818     void SetWindowStyle(long styles);
 819
 820     /**
 821         Sorts the children of the given item using
 822         OnCompareItems() method of wxTreeCtrl. You
 823         should override that method to change the sort order (the default is ascending
 824         case-sensitive alphabetical order).
 825
 826         @see wxTreeItemData, OnCompareItems()
 827     */
 828     void SortChildren(const wxTreeItemId& item);
 829
 830     /**
 831         Toggles the given item between collapsed and expanded states.
 832     */
 833     void Toggle(const wxTreeItemId& item);
 834
 835     /**
 836         Toggles the given item between selected and unselected states. For
 837         multiselection controls only.
 838     */
 839     void ToggleItemSelection(const wxTreeItemId& item);
 840
 841     /**
 842         Removes the selection from the currently selected item (if any).
 843     */
 844     void Unselect();
 845
 846     /**
 847         This function either behaves the same as Unselect()
 848         if the control doesn't have wxTR_MULTIPLE style, or removes the selection from
 849         all items if it does have this style.
 850     */
 851     void UnselectAll();
 852
 853     /**
 854         Unselects the given item. This works in multiselection controls only.
 855     */
 856     void UnselectItem(const wxTreeItemId& item);
 857 };
 858
 859
 860
 861 /**
 862     @class wxTreeEvent
 863     @wxheader{treectrl.h}
 864
 865     A tree event holds information about events associated with wxTreeCtrl objects.
 866
 867     @library{wxbase}
 868     @category{events}
 869
 870     @see wxTreeCtrl
 871 */
 872 class wxTreeEvent : public wxNotifyEvent
 873 {
 874 public:
 875     /**
 876         )
 877         Constructor, used by wxWidgets itself only.
 878     */
 879     wxTreeEvent(wxEventType commandType, wxTreeCtrl* tree);
 880
 881     /**
 882         Returns the item (valid for all events).
 883     */
 884     wxTreeItemId GetItem() const;
 885
 886     /**
 887         Returns the key code if the event is a key event. Use
 888         GetKeyEvent() to get the values of the
 889         modifier keys for this event (i.e. Shift or Ctrl).
 890     */
 891     int GetKeyCode() const;
 892
 893     /**
 894         Returns the key event for @c EVT_TREE_KEY_DOWN events.
 895     */
 896     const wxKeyEvent GetKeyEvent() const;
 897
 898     /**
 899         Returns the label if the event is a begin or end edit label event.
 900     */
 901     const wxString GetLabel() const;
 902
 903     /**
 904         Returns the old item index (valid for EVT_TREE_ITEM_CHANGING and CHANGED events)
 905     */
 906     wxTreeItemId GetOldItem() const;
 907
 908     /**
 909         Returns the position of the mouse pointer if the event is a drag or
 910         menu-context event.
 911         In both cases the position is in client coordinates - i.e. relative to the
 912         wxTreeCtrl
 913         window (so that you can pass it directly to e.g. wxWindow::PopupMenu).
 914     */
 915     wxPoint GetPoint() const;
 916
 917     /**
 918         Returns @true if the label edit was cancelled. This should be
 919         called from within an EVT_TREE_END_LABEL_EDIT handler.
 920     */
 921     bool IsEditCancelled() const;
 922
 923     /**
 924         Set the tooltip for the item (valid for EVT_TREE_ITEM_GETTOOLTIP events).
 925         Windows only.
 926     */
 927     void SetToolTip(const wxString& tooltip);
 928 };
 929