docs/latex/wx/treectrl.tex

   1 \section{\class{wxTreeCtrl}}\label{wxtreectrl}
   2
   3 A tree control presents information as a hierarchy, with items that may be expanded
   4 to show further items. Items in a tree control are referenced by wxTreeItemId handles.
   5
   6 To intercept events from a tree control, use the event table macros described in \helpref{wxTreeEvent}{wxtreeevent}.
   7
   8 \wxheading{Derived from}
   9
  10 \helpref{wxControl}{wxcontrol}\\
  11 \helpref{wxWindow}{wxwindow}\\
  12 \helpref{wxEvtHandler}{wxevthandler}\\
  13 \helpref{wxObject}{wxobject}
  14
  15 \wxheading{Include files}
  16
  17 <wx/treectrl.h>
  18
  19 \wxheading{Window styles}
  20
  21 \twocolwidtha{5cm}
  22 \begin{twocollist}\itemsep=0pt
  23 \twocolitem{\windowstyle{wxTR\_HAS\_BUTTONS}}{Use this style to show + and - buttons to the
  24 left of parent items. Win32 only. }
  25 \twocolitem{\windowstyle{wxTR\_EDIT\_LABELS}}{Use this style if you wish the user to be
  26 able to edit labels in the tree control.}
  27 \twocolitem{\windowstyle{wxTR\_MULTIPLE}}{Use this style to allow the user to
  28 select more than one item in the control - by default, only one item may be
  29 selected.}
  30 \end{twocollist}
  31
  32 See also \helpref{window styles overview}{windowstyles}.
  33
  34 \wxheading{Event handling}
  35
  36 To process input from a tree control, use these event handler macros to direct input to member
  37 functions that take a \helpref{wxTreeEvent}{wxtreeevent} argument.
  38
  39 \twocolwidtha{7cm}
  40 \begin{twocollist}\itemsep=0pt
  41 \twocolitem{{\bf EVT\_TREE\_BEGIN\_DRAG(id, func)}}{Begin dragging with the left mouse button.}
  42 \twocolitem{{\bf EVT\_TREE\_BEGIN\_RDRAG(id, func)}}{Begin dragging with the right mouse button.}
  43 \twocolitem{{\bf EVT\_TREE\_BEGIN\_LABEL\_EDIT(id, func)}}{Begin editing a label. This can be prevented by calling \helpref{Veto()}{wxnotifyeventveto}.}
  44 \twocolitem{{\bf EVT\_TREE\_END\_LABEL\_EDIT(id, func)}}{Finish editing a label. This can be prevented by calling \helpref{Veto()}{wxnotifyeventveto}.}
  45 \twocolitem{{\bf EVT\_TREE\_DELETE\_ITEM(id, func)}}{Delete an item.}
  46 \twocolitem{{\bf EVT\_TREE\_GET\_INFO(id, func)}}{Request information from the application.}
  47 \twocolitem{{\bf EVT\_TREE\_SET\_INFO(id, func)}}{Information is being supplied.}
  48 \twocolitem{{\bf EVT\_TREE\_ITEM\_EXPANDED(id, func)}}{Parent has been expanded.}
  49 \twocolitem{{\bf EVT\_TREE\_ITEM\_EXPANDING(id, func)}}{Parent is being expanded. This can be prevented by calling \helpref{Veto()}{wxnotifyeventveto}.}
  50 \twocolitem{{\bf EVT\_TREE\_SEL\_CHANGED(id, func)}}{Selection has changed.}
  51 \twocolitem{{\bf EVT\_TREE\_SEL\_CHANGING(id, func)}}{Selection is changing. This can be prevented by calling \helpref{Veto()}{wxnotifyeventveto}.}
  52 \twocolitem{{\bf EVT\_TREE\_KEY\_DOWN(id, func)}}{A key has been pressed.}
  53 \end{twocollist}%
  54
  55 \wxheading{See also}
  56
  57 \helpref{wxTreeItemData}{wxtreeitemdata}, \helpref{wxTreeCtrl overview}{wxtreectrloverview}, \helpref{wxListBox}{wxlistbox}, \helpref{wxListCtrl}{wxlistctrl},\rtfsp
  58 \helpref{wxImageList}{wximagelist}, \helpref{wxTreeEvent}{wxtreeevent}
  59
  60 \latexignore{\rtfignore{\wxheading{Members}}}
  61
  62 \membersection{wxTreeCtrl::wxTreeCtrl}\label{wxtreectrlconstr}
  63
  64 \func{}{wxTreeCtrl}{\void}
  65
  66 Default constructor.
  67
  68 \func{}{wxTreeCtrl}{\param{wxWindow*}{ parent}, \param{wxWindowID}{ id},\rtfsp
  69 \param{const wxPoint\&}{ pos = wxDefaultPosition}, \param{const wxSize\&}{ size = wxDefaultSize},\rtfsp
  70 \param{long}{ style = wxTR\_HAS\_BUTTONS}, \param{const wxValidator\& }{validator = wxDefaultValidator}, \param{const wxString\& }{name = ``listCtrl"}}
  71
  72 Constructor, creating and showing a tree control.
  73
  74 \wxheading{Parameters}
  75
  76 \docparam{parent}{Parent window. Must not be NULL.}
  77
  78 \docparam{id}{Window identifier. A value of -1 indicates a default value.}
  79
  80 \docparam{pos}{Window position.}
  81
  82 \docparam{size}{Window size. If the default size (-1, -1) is specified then the window is sized
  83 appropriately.}
  84
  85 \docparam{style}{Window style. See \helpref{wxTreeCtrl}{wxtreectrl}.}
  86
  87 \docparam{validator}{Window validator.}
  88
  89 \docparam{name}{Window name.}
  90
  91 \wxheading{See also}
  92
  93 \helpref{wxTreeCtrl::Create}{wxtreectrlcreate}, \helpref{wxValidator}{wxvalidator}
  94
  95 \membersection{wxTreeCtrl::\destruct{wxTreeCtrl}}
  96
  97 \func{void}{\destruct{wxTreeCtrl}}{\void}
  98
  99 Destructor, destroying the list control.
 100
 101 \membersection{wxTreeCtrl::AddRoot}\label{wxtreectrladdroot}
 102
 103 \func{wxTreeItemId}{AddRoot}{\param{const wxString\&}{ text},
 104  \param{int}{ image = -1}, \param{int}{ selImage = -1}, \param{wxTreeItemData*}{ data = NULL}}
 105
 106 Adds the root node to the tree, returning the new item.
 107
 108 If {\it image} > -1 and {\it selImage} is -1, the same image is used for
 109 both selected and unselected items.
 110
 111 \membersection{wxTreeCtrl::AppendItem}\label{wxtreectrlappenditem}
 112
 113 \func{wxTreeItemId}{AppendItem}{\param{const wxTreeItemId\& }{parent}, \param{const wxString\&}{ text},
 114  \param{int}{ image = -1}, \param{int}{ selImage = -1}, \param{wxTreeItemData*}{ data = NULL}}
 115
 116 Appends an item to the end of the branch identified by {\it parent}, return a new item id.
 117
 118 If {\it image} > -1 and {\it selImage} is -1, the same image is used for
 119 both selected and unselected items.
 120
 121 \membersection{wxTreeCtrl::Collapse}\label{wxtreectrlcollapse}
 122
 123 \func{void}{Collapse}{\param{const wxTreeItemId\&}{ item}}
 124
 125 Collapses the given item.
 126
 127 \membersection{wxTreeCtrl::CollapseAndReset}\label{wxtreectrlcollapseandreset}
 128
 129 \func{void}{CollapseAndReset}{\param{const wxTreeItemId\&}{ item}}
 130
 131 Collapses the given item and removes all children.
 132
 133 \membersection{wxTreeCtrl::Create}\label{wxtreectrlcreate}
 134
 135 \func{bool}{wxTreeCtrl}{\param{wxWindow*}{ parent}, \param{wxWindowID}{ id},\rtfsp
 136 \param{const wxPoint\&}{ pos = wxDefaultPosition}, \param{const wxSize\&}{ size = wxDefaultSize},\rtfsp
 137 \param{long}{ style = wxTR\_HAS\_BUTTONS}, \param{const wxValidator\& }{validator = wxDefaultValidator}, \param{const wxString\& }{name = ``listCtrl"}}
 138
 139 Creates the tree control. See \helpref{wxTreeCtrl::wxTreeCtrl}{wxtreectrlconstr} for further details.
 140
 141 \membersection{wxTreeCtrl::Delete}\label{wxtreectrldelete}
 142
 143 \func{void}{Delete}{\param{const wxTreeItemId\&}{ item}}
 144
 145 Deletes the specified item.
 146
 147 \membersection{wxTreeCtrl::DeleteAllItems}\label{wxtreectrldeleteallitems}
 148
 149 \func{void}{DeleteAllItems}{\void}
 150
 151 Deletes all the items in the control.
 152
 153 \membersection{wxTreeCtrl::EditLabel}\label{wxtreectrleditlabel}
 154
 155 \func{void}{EditLabel}{\param{const wxTreeItemId\&}{ item}}
 156
 157 Starts editing the label of the given item. This function generates a
 158 EVT\_TREE\_BEGIN\_LABEL\_EDIT event which can be vetoed so that no
 159 text control will appear for in-place editing.
 160
 161 If the user changed the label (i.e. s/he does not press ESC or leave
 162 the text control without changes, a EVT\_TREE\_END\_LABEL\_EDIT event
 163 will be sent which can be vetoed as well.
 164
 165 \wxheading{See also}
 166
 167 \helpref{wxTreeCtrl::EndEditLabel}{wxtreectrlendeditlabel},
 168 \helpref{wxTreeEvent}{wxtreeevent}
 169
 170 \membersection{wxTreeCtrl::EndEditLabel}\label{wxtreectrlendeditlabel}
 171
 172 \func{void}{EndEditLabel}{\param{bool }{cancelEdit}}
 173
 174 Ends label editing. If {\it cancelEdit} is TRUE, the edit will be cancelled.
 175
 176 This function is currently supported under Windows only.
 177
 178 \wxheading{See also}
 179
 180 \helpref{wxTreeCtrl::EditLabel}{wxtreectrleditlabel}
 181
 182 \membersection{wxTreeCtrl::EnsureVisible}\label{wxtreectrlensurevisible}
 183
 184 \func{void}{EnsureVisible}{\param{const wxTreeItemId\&}{ item}}
 185
 186 Scrolls and/or expands items to ensure that the given item is visible.
 187
 188 \membersection{wxTreeCtrl::Expand}\label{wxtreectrlexpand}
 189
 190 \func{void}{Expand}{\param{const wxTreeItemId\&}{ item}}
 191
 192 Expands the given item.
 193
 194 \membersection{wxTreeCtrl::GetBoundingRect}\label{wxtreectrlgetitemrect}
 195
 196 \constfunc{bool}{GetBoundingRect}{\param{const wxTreeItemId\&}{ item}, \param{wxRect\& }{rect}, \param{bool }{textOnly = FALSE}}
 197
 198 Retrieves the rectangle bounding the {\it item}. If {\it textOnly} is TRUE,
 199 only the rectangle around the items label will be returned, otherwise the
 200 items image is also taken into account.
 201
 202 The return value is TRUE if the rectangle was successfully retrieved or FALSE
 203 if it was not (in this case {\it rect} is not changed) - for example, if the
 204 item is currently invisible.
 205
 206 \pythonnote{The wxPython version of this method requires only the
 207 \tt{item} and \tt{textOnly} parameters.  The return value is either a
 208 \tt{wxRect} object or \tt{None}.}
 209
 210 \membersection{wxTreeCtrl::GetChildrenCount}\label{wxtreectrlgetchildrencount}
 211
 212 \constfunc{size\_t}{GetChildrenCount}{\param{const wxTreeItemId\&}{ item}, \param{bool}{ recursively = TRUE}}
 213
 214 Returns the number of items in the branch. If {\it recursively} is TRUE, returns the total number
 215 of descendants, otherwise only one level of children is counted.
 216
 217 \membersection{wxTreeCtrl::GetCount}\label{wxtreectrlgetcount}
 218
 219 \constfunc{int}{GetCount}{\void}
 220
 221 Returns the number of items in the control.
 222
 223 \membersection{wxTreeCtrl::GetEditControl}\label{wxtreectrlgeteditcontrol}
 224
 225 \constfunc{wxTextCtrl\&}{GetEditControl}{\void}
 226
 227 Returns the edit control used to edit a label.
 228
 229 \membersection{wxTreeCtrl::GetFirstChild}\label{wxtreectrlgetfirstchild}
 230
 231 \constfunc{wxTreeItemId}{GetFirstChild}{\param{const wxTreeItemId\&}{ item}, \param{long\& }{cookie}}
 232
 233 Returns the first child; call \helpref{wxTreeCtrl::GetNextChild}{wxtreectrlgetnextchild} for the next child.
 234
 235 For this enumeration function you must pass in a `cookie' parameter
 236 which is opaque for the application but is necessary for the library
 237 to make these functions reentrant (i.e. allow more than one
 238 enumeration on one and the same object simultaneously). The cookie passed to
 239 GetFirstChild and GetNextChild should be the same.
 240
 241 Returns an invalid tree item if there are no further children.
 242
 243 \wxheading{See also}
 244
 245 \helpref{wxTreeCtrl::GetNextChild}{wxtreectrlgetnextchild}
 246
 247 \pythonnote{In wxPython the returned wxTreeItemId and the new cookie
 248 value are both returned as a tuple containing the two values.}
 249
 250 \membersection{wxTreeCtrl::GetFirstVisibleItem}\label{wxtreectrlgetfirstvisibleitem}
 251
 252 \constfunc{wxTreeItemId}{GetFirstVisibleItem}{\void}
 253
 254 Returns the first visible item.
 255
 256 \membersection{wxTreeCtrl::GetImageList}\label{wxtreectrlgetimagelist}
 257
 258 \constfunc{wxImageList*}{GetImageList}{\void}
 259
 260 Returns the normal image list.
 261
 262 \membersection{wxTreeCtrl::GetIndent}\label{wxtreectrlgetindent}
 263
 264 \constfunc{int}{GetIndent}{\void}
 265
 266 Returns the current tree control indentation.
 267
 268 \membersection{wxTreeCtrl::GetItemData}\label{wxtreectrlgetitemdata}
 269
 270 \constfunc{wxTreeItemData*}{GetItemData}{\param{const wxTreeItemId\&}{ item}}
 271
 272 Returns the tree item data associated with the item.
 273
 274 \wxheading{See also}
 275
 276 \helpref{wxTreeItemData}{wxtreeitemdata}
 277
 278 \pythonnote{wxPython provides the following shortcut method:\par
 279 \indented{2cm}{\begin{twocollist}
 280 \twocolitem{\bf{GetPyData(item)}}{Returns the Python Object
 281 associated with the wxTreeItemData for the given item Id.}
 282 \end{twocollist}}
 283 }
 284
 285 \membersection{wxTreeCtrl::GetItemImage}\label{wxtreectrlgetitemimage}
 286
 287 \constfunc{int}{GetItemImage}{\param{const wxTreeItemId\& }{item},
 288 \param{wxTreeItemIcon }{which = wxTreeItemIcon\_Normal}}
 289
 290 Gets the specified item image. The value of {\it which} may be:
 291 \begin{itemize}\itemsep=0pt
 292 \item{wxTreeItemIcon\_Normal} to get the normal item image
 293 \item{wxTreeItemIcon\_Selected} to get the selected item image (i.e. the image
 294 which is shown when the item is currently selected)
 295 \item{wxTreeItemIcon\_Expanded} to get the expanded image (this only
 296 makes sense for items which have children - then this image is shown when the
 297 item is expanded and the normal image is shown when it is collapsed)
 298 \item{wxTreeItemIcon\_SelectedExpanded} to get the selected expanded image
 299 (which is shown when an expanded item is currently selected)
 300 \end{itemize}
 301
 302 \membersection{wxTreeCtrl::GetItemText}\label{wxtreectrlgetitemtext}
 303
 304 \constfunc{wxString}{GetItemText}{\param{const wxTreeItemId\&}{ item}}
 305
 306 Returns the item label.
 307
 308 \membersection{wxTreeCtrl::GetLastChild}\label{wxtreectrlgetlastchild}
 309
 310 \constfunc{wxTreeItemId}{GetLastChild}{\param{const wxTreeItemId\&}{ item}}
 311
 312 Returns the last child of the item (or an invalid tree item if this item has no children).
 313
 314 \wxheading{See also}
 315
 316 \helpref{GetFirstChild}{wxtreectrlgetfirstchild},
 317 \helpref{GetLastChild}{wxtreectrlgetlastchild}
 318
 319 \membersection{wxTreeCtrl::GetNextChild}\label{wxtreectrlgetnextchild}
 320
 321 \constfunc{wxTreeItemId}{GetNextChild}{\param{const wxTreeItemId\&}{ item}, \param{long\& }{cookie}}
 322
 323 Returns the next child; call \helpref{wxTreeCtrl::GetFirstChild}{wxtreectrlgetfirstchild} for the first child.
 324
 325 For this enumeration function you must pass in a `cookie' parameter
 326 which is opaque for the application but is necessary for the library
 327 to make these functions reentrant (i.e. allow more than one
 328 enumeration on one and the same object simultaneously). The cookie passed to
 329 GetFirstChild and GetNextChild should be the same.
 330
 331 Returns an invalid tree item if there are no further children.
 332
 333 \wxheading{See also}
 334
 335 \helpref{wxTreeCtrl::GetFirstChild}{wxtreectrlgetfirstchild}
 336
 337 \pythonnote{In wxPython the returned wxTreeItemId and the new cookie
 338 value are both returned as a tuple containing the two values.}
 339
 340 \membersection{wxTreeCtrl::GetNextSibling}\label{wxtreectrlgetnextsibling}
 341
 342 \constfunc{wxTreeItemId}{GetNextSibling}{\param{const wxTreeItemId\&}{ item}}
 343
 344 Returns the next sibling of the specified item; call \helpref{wxTreeCtrl::GetPrevSibling}{wxtreectrlgetprevsibling} for the previous sibling.
 345
 346 Returns an invalid tree item if there are no further siblings.
 347
 348 \wxheading{See also}
 349
 350 \helpref{wxTreeCtrl::GetPrevSibling}{wxtreectrlgetprevsibling}
 351
 352 \membersection{wxTreeCtrl::GetNextVisible}\label{wxtreectrlgetnextvisible}
 353
 354 \constfunc{wxTreeItemId}{GetNextVisible}{\param{const wxTreeItemId\&}{ item}}
 355
 356 Returns the next visible item.
 357
 358 \membersection{wxTreeCtrl::GetParent}\label{wxtreectrlgetparent}
 359
 360 \constfunc{wxTreeItemId}{GetParent}{\param{const wxTreeItemId\&}{ item}}
 361
 362 Returns the item's parent.
 363
 364 \membersection{wxTreeCtrl::GetPrevSibling}\label{wxtreectrlgetprevsibling}
 365
 366 \constfunc{wxTreeItemId}{GetPrevSibling}{\param{const wxTreeItemId\&}{ item}}
 367
 368 Returns the previous sibling of the specified item; call \helpref{wxTreeCtrl::GetNextSibling}{wxtreectrlgetnextsibling} for the next sibling.
 369
 370 Returns an invalid tree item if there are no further children.
 371
 372 \wxheading{See also}
 373
 374 \helpref{wxTreeCtrl::GetNextSibling}{wxtreectrlgetnextsibling}
 375
 376 \membersection{wxTreeCtrl::GetPrevVisible}\label{wxtreectrlgetprevvisible}
 377
 378 \constfunc{wxTreeItemId}{GetPrevVisible}{\param{const wxTreeItemId\&}{ item}}
 379
 380 Returns the previous visible item.
 381
 382 \membersection{wxTreeCtrl::GetRootItem}\label{wxtreectrlgetrootitem}
 383
 384 \constfunc{wxTreeItemId}{GetRootItem}{\void}
 385
 386 Returns the root item for the tree control.
 387
 388 \membersection{wxTreeCtrl::GetItemSelectedImage}\label{wxtreectrlgetitemselectedimage}
 389
 390 \constfunc{int}{GetItemSelectedImage}{\param{const wxTreeItemId\& }{item}}
 391
 392 Gets the selected item image (this function is obsolete, use
 393 {\tt GetItemImage(item, wxTreeItemIcon\_Selected} instead).
 394
 395 \membersection{wxTreeCtrl::GetSelection}\label{wxtreectrlgetselection}
 396
 397 \constfunc{wxTreeItemId}{GetSelection}{\void}
 398
 399 Returns the selection, or an invalid item if there is no selection.
 400 This function only works with the controls without wxTR\_MULTIPLE style, use
 401 \helpref{GetSelections}{wxtreectrlgetselections} for the controls which do have
 402 this style.
 403
 404 \membersection{wxTreeCtrl::GetSelections}\label{wxtreectrlgetselections}
 405
 406 \constfunc{size\_t}{GetSelections}{\param{wxArrayTreeItemIds\& }{selection}}
 407
 408 Fills the array of tree items passed in with the currently selected items. This
 409 function can be called only if the control has the wxTR\_MULTIPLE style.
 410
 411 Returns the number of selected items.
 412
 413 \pythonnote{The wxPython version of this method accepts no parameters
 414 and returns a Python list of \tt{wxTreeItemId}'s.}
 415
 416 \membersection{wxTreeCtrl::GetStateImageList}\label{wxtreectrlgetstateimagelist}
 417
 418 \constfunc{wxImageList*}{GetStateImageList}{\void}
 419
 420 Returns the state image list (from which application-defined state images are taken).
 421
 422 \membersection{wxTreeCtrl::HitTest}\label{wxtreectrlhittest}
 423
 424 \func{long}{HitTest}{\param{const wxPoint\& }{point}, \param{int\& }{flags}}
 425
 426 Calculates which (if any) item is under the given point, returning extra information
 427 in {\it flags}. {\it flags} is a bitlist of the following:
 428
 429 \twocolwidtha{5cm}
 430 \begin{twocollist}\itemsep=0pt
 431 \twocolitem{wxTREE\_HITTEST\_ABOVE}{Above the client area.}
 432 \twocolitem{wxTREE\_HITTEST\_BELOW}{Below the client area.}
 433 \twocolitem{wxTREE\_HITTEST\_NOWHERE}{In the client area but below the last item.}
 434 \twocolitem{wxTREE\_HITTEST\_ONITEMBUTTON}{On the button associated with an item.}
 435 \twocolitem{wxTREE\_HITTEST\_ONITEMICON}{On the bitmap associated with an item.}
 436 \twocolitem{wxTREE\_HITTEST\_ONITEMINDENT}{In the indentation associated with an item.}
 437 \twocolitem{wxTREE\_HITTEST\_ONITEMLABEL}{On the label (string) associated with an item.}
 438 \twocolitem{wxTREE\_HITTEST\_ONITEMRIGHT}{In the area to the right of an item.}
 439 \twocolitem{wxTREE\_HITTEST\_ONITEMSTATEICON}{On the state icon for a tree view item that is in a user-defined state.}
 440 \twocolitem{wxTREE\_HITTEST\_TOLEFT}{To the right of the client area.}
 441 \twocolitem{wxTREE\_HITTEST\_TORIGHT}{To the left of the client area.}
 442 \end{twocollist}
 443
 444 \membersection{wxTreeCtrl::InsertItem}\label{wxtreectrlinsertitem}
 445
 446 \func{wxTreeItemId}{InsertItem}{\param{const wxTreeItemId\& }{parent}, \param{const wxTreeItemId\& }{previous}, \param{const wxString\&}{ text},
 447  \param{int}{ image = -1}, \param{int}{ selImage = -1}, \param{wxTreeItemData*}{ data = NULL}}
 448
 449 Inserts an item after a given one.
 450
 451 If {\it image} > -1 and {\it selImage} is -1, the same image is used for
 452 both selected and unselected items.
 453
 454 \membersection{wxTreeCtrl::IsBold}\label{wxtreectrlisbold}
 455
 456 \constfunc{bool}{IsBold}{\param{const wxTreeItemId\& }{item}}
 457
 458 Returns TRUE if the given item is in bold state.
 459
 460 See also: \helpref{SetItemBold}{wxtreectrlsetitembold}
 461
 462 \membersection{wxTreeCtrl::IsExpanded}\label{wxtreectrlisexpanded}
 463
 464 \constfunc{bool}{IsExpanded}{\param{const wxTreeItemId\&}{ item}}
 465
 466 Returns TRUE if the item is expanded (only makes sense if it has children).
 467
 468 \membersection{wxTreeCtrl::IsSelected}\label{wxtreectrlisselected}
 469
 470 \constfunc{bool}{IsSelected}{\param{const wxTreeItemId\&}{ item}}
 471
 472 Returns TRUE if the item is selected.
 473
 474 \membersection{wxTreeCtrl::IsVisible}\label{wxtreectrlisvisible}
 475
 476 \constfunc{bool}{IsVisible}{\param{const wxTreeItemId\&}{ item}}
 477
 478 Returns TRUE if the item is visible (it might be outside the view, or not expanded).
 479
 480 \membersection{wxTreeCtrl::ItemHasChildren}\label{wxtreectrlitemhaschildren}
 481
 482 \constfunc{bool}{ItemHasChildren}{\param{const wxTreeItemId\&}{ item}}
 483
 484 Returns TRUE if the item has children.
 485
 486 \membersection{wxTreeCtrl::OnCompareItems}\label{wxtreectrloncompareitems}
 487
 488 \func{int}{OnCompareItems}{\param{const wxTreeItemId\& }{item1}, \param{const wxTreeItemId\& }{item2}}
 489
 490 Override this function in the derived class to change the sort order of the
 491 items in the tree control. The function should return a negative, zero or
 492 positive value if the first item is less than, equal to or greater than the
 493 second one.
 494
 495 The base class version compares items alphabetically.
 496
 497 See also: \helpref{SortChildren}{wxtreectrlsortchildren}
 498
 499 \membersection{wxTreeCtrl::PrependItem}\label{wxtreectrlprependitem}
 500
 501 \func{wxTreeItemId}{PrependItem}{\param{const wxTreeItemId\& }{parent}, \param{const wxString\&}{ text},
 502  \param{int}{ image = -1}, \param{int}{ selImage = -1}, \param{wxTreeItemData*}{ data = NULL}}
 503
 504 Appends an item as the first child of {\it parent}, return a new item id.
 505
 506 If {\it image} > -1 and {\it selImage} is -1, the same image is used for
 507 both selected and unselected items.
 508
 509 \membersection{wxTreeCtrl::ScrollTo}\label{wxtreectrlscrollto}
 510
 511 \func{void}{ScrollTo}{\param{const wxTreeItemId\&}{ item}}
 512
 513 Scrolls the specified item into view.
 514
 515 \membersection{wxTreeCtrl::SelectItem}\label{wxtreectrlselectitem}
 516
 517 \func{bool}{SelectItem}{\param{const wxTreeItemId\&}{ item}}
 518
 519 Selects the given item.
 520
 521 \membersection{wxTreeCtrl::SetIndent}\label{wxtreectrlsetindent}
 522
 523 \func{void}{SetIndent}{\param{int }{indent}}
 524
 525 Sets the indentation for the tree control.
 526
 527 \membersection{wxTreeCtrl::SetImageList}\label{wxtreectrlsetimagelist}
 528
 529 \func{void}{SetImageList}{\param{wxImageList*}{ imageList}}
 530
 531 Sets the normal image list.
 532
 533 \membersection{wxTreeCtrl::SetItemBold}\label{wxtreectrlsetitembold}
 534
 535 \func{void}{SetItemBold}{\param{const wxTreeItemId\& }{item}, \param{bool}{ bold = TRUE}}
 536
 537 Makes item appear in bold font if {\it bold} parameter is TRUE or resets it to
 538 the normal state.
 539
 540 See also: \helpref{IsBold}{wxtreectrlisbold}
 541
 542 \membersection{wxTreeCtrl::SetItemData}\label{wxtreectrlsetitemdata}
 543
 544 \func{void}{SetItemData}{\param{const wxTreeItemId\&}{ item}, \param{wxTreeItemData* }{data}}
 545
 546 Sets the item client data.
 547
 548 \pythonnote{wxPython provides the following shortcut method:\par
 549 \indented{2cm}{\begin{twocollist}
 550 \twocolitem{\bf{SetPyData(item, obj)}}{Associate the given Python
 551 Object with the wxTreeItemData for the given item Id.}
 552 \end{twocollist}}
 553 }
 554
 555 \membersection{wxTreeCtrl::SetItemHasChildren}\label{wxtreectrlsetitemhaschildren}
 556
 557 \func{void}{SetItemHasChildren}{\param{const wxTreeItemId\&}{ item}, \param{bool }{hasChildren = TRUE}}
 558
 559 Force appearance of the button next to the item. This is useful to
 560 allow the user to expand the items which don't have any children now,
 561 but instead adding them only when needed, thus minimizing memory
 562 usage and loading time.
 563
 564 \membersection{wxTreeCtrl::SetItemImage}\label{wxtreectrlsetitemimage}
 565
 566 \func{void}{SetItemImage}{\param{const wxTreeItemId\&}{ item},
 567 \param{int }{image},
 568 \param{wxTreeItemIcon }{which = wxTreeItemIcon\_Normal}}
 569
 570 Sets the specified item image. See \helpref{GetItemImage}{wxtreectrlgetitemimage}
 571 for the description of {\it which} parameter.
 572
 573 \membersection{wxTreeCtrl::SetItemSelectedImage}\label{wxtreectrlsetitemselectedimage}
 574
 575 \func{void}{SetItemSelectedImage}{\param{const wxTreeItemId\&}{ item}, \param{int }{selImage}}
 576
 577 Sets the selected item image (this function is obsolete, use
 578 {\tt SetItemImage(item, wxTreeItemIcon\_Selected} instead).
 579
 580 \membersection{wxTreeCtrl::SetItemText}\label{wxtreectrlsetitemtext}
 581
 582 \func{void}{SetItemText}{\param{const wxTreeItemId\&}{ item}, \param{const wxString\& }{text}}
 583
 584 Sets the item label.
 585
 586 \membersection{wxTreeCtrl::SetStateImageList}\label{wxtreectrlsetstateimagelist}
 587
 588 \func{void}{SetStateImageList}{\param{wxImageList*}{ imageList}}
 589
 590 Sets the state image list (from which application-defined state images are taken).
 591
 592 \membersection{wxTreeCtrl::SortChildren}\label{wxtreectrlsortchildren}
 593
 594 \func{void}{SortChildren}{\param{const wxTreeItemId\&}{ item}}
 595
 596 Sorts the children of the given item using
 597 \helpref{OnCompareItems}{wxtreectrloncompareitems} method of wxTreeCtrl. You
 598 should override that method to change the sort order (default is ascending
 599 alphabetical order).
 600
 601 \wxheading{See also}
 602
 603 \helpref{wxTreeItemData}{wxtreeitemdata}, \helpref{OnCompareItems}{wxtreectrloncompareitems}
 604
 605 \membersection{wxTreeCtrl::Toggle}\label{wxtreectrltoggle}
 606
 607 \func{void}{Toggle}{\param{const wxTreeItemId\&}{ item}}
 608
 609 Toggles the given item between collapsed and expanded states.
 610
 611 \membersection{wxTreeCtrl::Unselect}\label{wxtreectrlunselect}
 612
 613 \func{void}{Unselect}{\void}
 614
 615 Removes the selection from the currently selected item (if any).
 616
 617 \membersection{wxTreeCtrl::UnselectAll}\label{wxtreectrlunselectall}
 618
 619 \func{void}{UnselectAll}{\void}
 620
 621 This function either behaves the same as \helpref{Unselect}{wxtreectrlunselect}
 622 if the control doesn't have wxTR\_MULTIPLE style, or removes the selection from
 623 all items if it does have this style.
 624
 625 \section{\class{wxTreeItemData}}\label{wxtreeitemdata}
 626
 627 wxTreeItemData is some (arbitrary) user class associated with some item. The
 628 main advantage of having this class (compared to the old untyped interface) is
 629 that wxTreeItemData's are destroyed automatically by the tree and, as this
 630 class has virtual dtor, it means that the memory will be automatically
 631 freed. We don't just use wxObject instead of wxTreeItemData because
 632 the size of this class is critical: in any real application, each tree leaf
 633 will have wxTreeItemData associated with it and number of leaves may be
 634 quite big.
 635
 636 Because the objects of this class are deleted by the tree, they should
 637 always be allocated on the heap.
 638
 639 \wxheading{Derived from}
 640
 641 wxTreeItemId
 642
 643 \wxheading{Include files}
 644
 645 <wx/treectrl.h>
 646
 647 \wxheading{See also}
 648
 649 \helpref{wxTreeCtrl}{wxtreectrl}
 650
 651 \latexignore{\rtfignore{\wxheading{Members}}}
 652
 653 \membersection{wxTreeItemData::wxTreeItemData}\label{wxtreeitemdataconstr}
 654
 655 \func{}{wxTreeItemData}{\void}
 656
 657 Default constructor.
 658
 659 \pythonnote{The wxPython version of this constructor optionally
 660 accepts any Python object as a parameter.  This object is then
 661 associated with the tree item using the wxTreeItemData as a
 662 container.
 663
 664 In addition, the following methods are added in wxPython for accessing
 665 the object:\par
 666 \indented{2cm}{\begin{twocollist}
 667 \twocolitem{\bf{GetData()}}{Returns a reference to the Python Object}
 668 \twocolitem{\bf{SetData(obj)}}{Associates a new Python Object with the
 669 wxTreeItemData}
 670 \end{twocollist}}
 671 }
 672
 673
 674 \membersection{wxTreeItemData::\destruct{wxTreeItemData}}
 675
 676 \func{void}{\destruct{wxTreeItemData}}{\void}
 677
 678 Virtual destructor.
 679
 680 \membersection{wxTreeItemData::GetId}\label{wxtreeitemdatagetid}
 681
 682 \func{const wxTreeItem\&}{GetId}{\void}
 683
 684 Returns the item associated with this node.
 685
 686 \membersection{wxTreeItemData::SetId}\label{wxtreeitemdatasetid}
 687
 688 \func{void}{SetId}{\param{const wxTreeItemId\&}{ id}}
 689
 690 Sets the item associated with this node.
 691