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\_EDIT\_LABELS}}{Use this style
  24 if you wish the user to be able to edit labels in the tree control.}
  25 \twocolitem{\windowstyle{wxTR\_NO\_BUTTONS}}{For convenience
  26 to document that no buttons are to be drawn.}
  27 \twocolitem{\windowstyle{wxTR\_HAS\_BUTTONS}}{Use this style
  28 to show + and - buttons to the left of parent items.}
  29 \twocolitem{\windowstyle{wxTR\_TWIST\_BUTTONS}}{Use this style
  30 to show Mac-style twister buttons to the left of parent items.
  31 If both wxTR\_HAS\_BUTTONS and wxTR\_TWIST\_BUTTONS are given,
  32 twister buttons are generated.  Generic only.}
  33 \twocolitem{\windowstyle{wxTR\_NO\_LINES}}{Use this style
  34 to hide vertical level connectors.}
  35 \twocolitem{\windowstyle{wxTR\_FULL\_ROW\_HIGHLIGHT}}{Use this style to have the background
  36 colour and the selection highlight extend over the entire horizontal
  37 row of the tree control window. (This flag is ignored under Windows unless you
  38 specify wxTR\_NO\_LINES as well.) }
  39 \twocolitem{\windowstyle{wxTR\_LINES\_AT\_ROOT}}{Use this style
  40 to show lines between root nodes.
  41 Only applicable if wxTR\_HIDE\_ROOT is set and wxTR\_NO\_LINES is not set.}
  42 \twocolitem{\windowstyle{wxTR\_HIDE\_ROOT}}{Use this style
  43 to suppress the display of the root node,
  44 effectively causing the first-level nodes
  45 to appear as a series of root nodes.  Generic only.}
  46 \twocolitem{\windowstyle{wxTR\_ROW\_LINES}}{Use this style
  47 to draw a contrasting border between displayed rows.}
  48 \twocolitem{\windowstyle{wxTR\_HAS\_VARIABLE\_ROW\_HEIGHT}}{Use this style
  49 to cause row heights to be just big enough to fit the content.
  50 If not set, all rows use the largest row height.
  51 The default is that this flag is unset.
  52 Generic only.}
  53 \twocolitem{\windowstyle{wxTR\_SINGLE}}{For convenience
  54 to document that only one item may be selected at a time.
  55 Selecting another item causes the current selection, if any,
  56 to be deselected.  This is the default.}
  57 \twocolitem{\windowstyle{wxTR\_MULTIPLE}}{Use this style
  58 to allow a range of items to be selected.
  59 If a second range is selected, the current range, if any, is deselected.}
  60 \twocolitem{\windowstyle{wxTR\_EXTENDED}}{Use this style
  61 to allow disjoint items to be selected.  (Only partially implemented; may not work in all cases.)}
  62 \twocolitem{\windowstyle{wxTR\_DEFAULT\_STYLE}}{The set of flags that are
  63 closest to the defaults for the native control for a particular toolkit.}
  64 \end{twocollist}
  65
  66 See also \helpref{window styles overview}{windowstyles}.
  67
  68 \wxheading{Event handling}
  69
  70 To process input from a tree control, use these event handler macros to direct input to member
  71 functions that take a \helpref{wxTreeEvent}{wxtreeevent} argument.
  72
  73 \twocolwidtha{7cm}
  74 \begin{twocollist}\itemsep=0pt
  75 \twocolitem{{\bf EVT\_TREE\_BEGIN\_DRAG(id, func)}}{Begin dragging with the left mouse button.}
  76 \twocolitem{{\bf EVT\_TREE\_BEGIN\_RDRAG(id, func)}}{Begin dragging with the right mouse button.}
  77 \twocolitem{{\bf EVT\_TREE\_BEGIN\_LABEL\_EDIT(id, func)}}{Begin editing a label. This can be prevented by calling \helpref{Veto()}{wxnotifyeventveto}.}
  78 \twocolitem{{\bf EVT\_TREE\_END\_LABEL\_EDIT(id, func)}}{Finish editing a label. This can be prevented by calling \helpref{Veto()}{wxnotifyeventveto}.}
  79 \twocolitem{{\bf EVT\_TREE\_DELETE\_ITEM(id, func)}}{Delete an item.}
  80 \twocolitem{{\bf EVT\_TREE\_GET\_INFO(id, func)}}{Request information from the application.}
  81 \twocolitem{{\bf EVT\_TREE\_SET\_INFO(id, func)}}{Information is being supplied.}
  82 \twocolitem{{\bf EVT\_TREE\_ITEM\_ACTIVATED(id, func)}}{The item has been activated, i.e. chosen by double clicking it with mouse or from keyboard}
  83 \twocolitem{{\bf EVT\_TREE\_ITEM\_COLLAPSED(id, func)}}{The item has been collapsed.}
  84 \twocolitem{{\bf EVT\_TREE\_ITEM\_COLLAPSING(id, func)}}{The item is being collapsed. This can be prevented by calling \helpref{Veto()}{wxnotifyeventveto}.}
  85 \twocolitem{{\bf EVT\_TREE\_ITEM\_EXPANDED(id, func)}}{The item has been expanded.}
  86 \twocolitem{{\bf EVT\_TREE\_ITEM\_EXPANDING(id, func)}}{The item is being expanded. This can be prevented by calling \helpref{Veto()}{wxnotifyeventveto}.}
  87 \twocolitem{{\bf EVT\_TREE\_SEL\_CHANGED(id, func)}}{Selection has changed.}
  88 \twocolitem{{\bf EVT\_TREE\_SEL\_CHANGING(id, func)}}{Selection is changing. This can be prevented by calling \helpref{Veto()}{wxnotifyeventveto}.}
  89 \twocolitem{{\bf EVT\_TREE\_KEY\_DOWN(id, func)}}{A key has been pressed.}
  90 \end{twocollist}%
  91
  92 \wxheading{See also}
  93
  94 \helpref{wxTreeItemData}{wxtreeitemdata}, \helpref{wxTreeCtrl overview}{wxtreectrloverview}, \helpref{wxListBox}{wxlistbox}, \helpref{wxListCtrl}{wxlistctrl},\rtfsp
  95 \helpref{wxImageList}{wximagelist}, \helpref{wxTreeEvent}{wxtreeevent}
  96
  97 \wxheading{Win32 notes}
  98
  99 wxTreeCtrl class uses the standard common treeview control under Win32
 100 implemented in the system library {\tt comctl32.dll}. Some versions of this
 101 library are known to have bugs with handling the tree control colours: the
 102 usual symptom is that the expanded items leave black (or otherwise incorrectly
 103 coloured) background behind them, especially for the controls using non
 104 default background colour. The recommended solution is to upgrade the {\tt comctl32.dll}
 105 to a newer version: see
 106 \urlref{http://www.microsoft.com/msdownload/ieplatform/ie/comctrlx86.asp}{http://www.microsoft.com/msdownload/ieplatform/ie/comctrlx86.asp}.
 107
 108 \latexignore{\rtfignore{\wxheading{Members}}}
 109
 110 \membersection{wxTreeCtrl::wxTreeCtrl}\label{wxtreectrlconstr}
 111
 112 \func{}{wxTreeCtrl}{\void}
 113
 114 Default constructor.
 115
 116 \func{}{wxTreeCtrl}{\param{wxWindow*}{ parent}, \param{wxWindowID}{ id},\rtfsp
 117 \param{const wxPoint\&}{ pos = wxDefaultPosition}, \param{const wxSize\&}{ size = wxDefaultSize},\rtfsp
 118 \param{long}{ style = wxTR\_HAS\_BUTTONS}, \param{const wxValidator\& }{validator = wxDefaultValidator}, \param{const wxString\& }{name = ``listCtrl"}}
 119
 120 Constructor, creating and showing a tree control.
 121
 122 \wxheading{Parameters}
 123
 124 \docparam{parent}{Parent window. Must not be NULL.}
 125
 126 \docparam{id}{Window identifier. A value of -1 indicates a default value.}
 127
 128 \docparam{pos}{Window position.}
 129
 130 \docparam{size}{Window size. If the default size (-1, -1) is specified then the window is sized
 131 appropriately.}
 132
 133 \docparam{style}{Window style. See \helpref{wxTreeCtrl}{wxtreectrl}.}
 134
 135 \docparam{validator}{Window validator.}
 136
 137 \docparam{name}{Window name.}
 138
 139 \wxheading{See also}
 140
 141 \helpref{wxTreeCtrl::Create}{wxtreectrlcreate}, \helpref{wxValidator}{wxvalidator}
 142
 143 \membersection{wxTreeCtrl::\destruct{wxTreeCtrl}}
 144
 145 \func{void}{\destruct{wxTreeCtrl}}{\void}
 146
 147 Destructor, destroying the list control.
 148
 149 \membersection{wxTreeCtrl::AddRoot}\label{wxtreectrladdroot}
 150
 151 \func{wxTreeItemId}{AddRoot}{\param{const wxString\&}{ text},
 152  \param{int}{ image = -1}, \param{int}{ selImage = -1}, \param{wxTreeItemData*}{ data = NULL}}
 153
 154 Adds the root node to the tree, returning the new item.
 155
 156 The {\it image} and {\it selImage} parameters are an index within
 157 the normal image list specifying the image to use for unselected and
 158 selected items, respectively.
 159 If {\it image} > -1 and {\it selImage} is -1, the same image is used for
 160 both selected and unselected items.
 161
 162 \membersection{wxTreeCtrl::AppendItem}\label{wxtreectrlappenditem}
 163
 164 \func{wxTreeItemId}{AppendItem}{\param{const wxTreeItemId\& }{parent}, \param{const wxString\&}{ text},
 165  \param{int}{ image = -1}, \param{int}{ selImage = -1}, \param{wxTreeItemData*}{ data = NULL}}
 166
 167 Appends an item to the end of the branch identified by {\it parent}, return a new item id.
 168
 169 The {\it image} and {\it selImage} parameters are an index within
 170 the normal image list specifying the image to use for unselected and
 171 selected items, respectively.
 172 If {\it image} > -1 and {\it selImage} is -1, the same image is used for
 173 both selected and unselected items.
 174
 175 \membersection{wxTreeCtrl::AssignButtonsImageList}\label{wxtreectrlassignbuttonsimagelist}
 176
 177 \func{void}{AssignButtonsImageList}{\param{wxImageList*}{ imageList}}
 178
 179 Sets the buttons image list. The button images assigned with this method will
 180 be automatically deleted by wxTreeCtrl as appropriate
 181 (i.e. it takes ownership of the list).
 182
 183 Setting or assigning the button image list enables the display of image buttons.
 184 Once enabled, the only way to disable the display of button images is to set
 185 the button image list to NULL.
 186
 187 This function is only available in the generic version.
 188
 189 See also \helpref{SetButtonsImageList}{wxtreectrlsetbuttonsimagelist}.
 190
 191 \membersection{wxTreeCtrl::AssignImageList}\label{wxtreectrlassignimagelist}
 192
 193 \func{void}{AssignImageList}{\param{wxImageList*}{ imageList}}
 194
 195 Sets the normal image list. Image list assigned with this method will
 196 be automatically deleted by wxTreeCtrl as appropriate
 197 (i.e. it takes ownership of the list).
 198
 199 See also \helpref{SetImageList}{wxtreectrlsetimagelist}.
 200
 201 \membersection{wxTreeCtrl::AssignStateImageList}\label{wxtreectrlassignstateimagelist}
 202
 203 \func{void}{AssignStateImageList}{\param{wxImageList*}{ imageList}}
 204
 205 Sets the state image list. Image list assigned with this method will
 206 be automatically deleted by wxTreeCtrl as appropriate
 207 (i.e. it takes ownership of the list).
 208
 209 See also \helpref{SetStateImageList}{wxtreectrlsetstateimagelist}.
 210
 211
 212 \membersection{wxTreeCtrl::Collapse}\label{wxtreectrlcollapse}
 213
 214 \func{void}{Collapse}{\param{const wxTreeItemId\&}{ item}}
 215
 216 Collapses the given item.
 217
 218 \membersection{wxTreeCtrl::CollapseAndReset}\label{wxtreectrlcollapseandreset}
 219
 220 \func{void}{CollapseAndReset}{\param{const wxTreeItemId\&}{ item}}
 221
 222 Collapses the given item and removes all children.
 223
 224 \membersection{wxTreeCtrl::Create}\label{wxtreectrlcreate}
 225
 226 \func{bool}{wxTreeCtrl}{\param{wxWindow*}{ parent}, \param{wxWindowID}{ id},\rtfsp
 227 \param{const wxPoint\&}{ pos = wxDefaultPosition}, \param{const wxSize\&}{ size = wxDefaultSize},\rtfsp
 228 \param{long}{ style = wxTR\_HAS\_BUTTONS}, \param{const wxValidator\& }{validator = wxDefaultValidator}, \param{const wxString\& }{name = ``listCtrl"}}
 229
 230 Creates the tree control. See \helpref{wxTreeCtrl::wxTreeCtrl}{wxtreectrlconstr} for further details.
 231
 232 \membersection{wxTreeCtrl::Delete}\label{wxtreectrldelete}
 233
 234 \func{void}{Delete}{\param{const wxTreeItemId\&}{ item}}
 235
 236 Deletes the specified item.
 237
 238 \membersection{wxTreeCtrl::DeleteAllItems}\label{wxtreectrldeleteallitems}
 239
 240 \func{void}{DeleteAllItems}{\void}
 241
 242 Deletes all the items in the control.
 243
 244 \membersection{wxTreeCtrl::EditLabel}\label{wxtreectrleditlabel}
 245
 246 \func{void}{EditLabel}{\param{const wxTreeItemId\&}{ item}}
 247
 248 Starts editing the label of the given item. This function generates a
 249 EVT\_TREE\_BEGIN\_LABEL\_EDIT event which can be vetoed so that no
 250 text control will appear for in-place editing.
 251
 252 If the user changed the label (i.e. s/he does not press ESC or leave
 253 the text control without changes, a EVT\_TREE\_END\_LABEL\_EDIT event
 254 will be sent which can be vetoed as well.
 255
 256 \wxheading{See also}
 257
 258 \helpref{wxTreeCtrl::EndEditLabel}{wxtreectrlendeditlabel},
 259 \helpref{wxTreeEvent}{wxtreeevent}
 260
 261 \membersection{wxTreeCtrl::EndEditLabel}\label{wxtreectrlendeditlabel}
 262
 263 \func{void}{EndEditLabel}{\param{bool }{cancelEdit}}
 264
 265 Ends label editing. If {\it cancelEdit} is TRUE, the edit will be cancelled.
 266
 267 This function is currently supported under Windows only.
 268
 269 \wxheading{See also}
 270
 271 \helpref{wxTreeCtrl::EditLabel}{wxtreectrleditlabel}
 272
 273 \membersection{wxTreeCtrl::EnsureVisible}\label{wxtreectrlensurevisible}
 274
 275 \func{void}{EnsureVisible}{\param{const wxTreeItemId\&}{ item}}
 276
 277 Scrolls and/or expands items to ensure that the given item is visible.
 278
 279 \membersection{wxTreeCtrl::Expand}\label{wxtreectrlexpand}
 280
 281 \func{void}{Expand}{\param{const wxTreeItemId\&}{ item}}
 282
 283 Expands the given item.
 284
 285 \membersection{wxTreeCtrl::GetBoundingRect}\label{wxtreectrlgetitemrect}
 286
 287 \constfunc{bool}{GetBoundingRect}{\param{const wxTreeItemId\&}{ item}, \param{wxRect\& }{rect}, \param{bool }{textOnly = FALSE}}
 288
 289 Retrieves the rectangle bounding the {\it item}. If {\it textOnly} is TRUE,
 290 only the rectangle around the item's label will be returned, otherwise the
 291 item's image is also taken into account.
 292
 293 The return value is TRUE if the rectangle was successfully retrieved or FALSE
 294 if it was not (in this case {\it rect} is not changed) - for example, if the
 295 item is currently invisible.
 296
 297 \pythonnote{The wxPython version of this method requires only the
 298 {\tt item} and {\tt textOnly} parameters.  The return value is either a
 299 {\tt wxRect} object or {\tt None}.}
 300
 301 \perlnote{In wxPerl this method only takes the parameters {\tt item} and
 302   {\tt textOnly}, and returns a Wx::Rect ( or undef ).}
 303
 304 \membersection{wxTreeCtrl::GetButtonsImageList}\label{wxtreectrlgetbuttonsimagelist}
 305
 306 \constfunc{wxImageList*}{GetButtonsImageList}{\void}
 307
 308 Returns the buttons image list (from which application-defined button images are taken).
 309
 310 This function is only available in the generic version.
 311
 312 \membersection{wxTreeCtrl::GetChildrenCount}\label{wxtreectrlgetchildrencount}
 313
 314 \constfunc{size\_t}{GetChildrenCount}{\param{const wxTreeItemId\&}{ item}, \param{bool}{ recursively = TRUE}}
 315
 316 Returns the number of items in the branch. If {\it recursively} is TRUE, returns the total number
 317 of descendants, otherwise only one level of children is counted.
 318
 319 \membersection{wxTreeCtrl::GetCount}\label{wxtreectrlgetcount}
 320
 321 \constfunc{int}{GetCount}{\void}
 322
 323 Returns the number of items in the control.
 324
 325 \membersection{wxTreeCtrl::GetEditControl}\label{wxtreectrlgeteditcontrol}
 326
 327 \constfunc{wxTextCtrl\&}{GetEditControl}{\void}
 328
 329 Returns the edit control used to edit a label.
 330
 331 \membersection{wxTreeCtrl::GetFirstChild}\label{wxtreectrlgetfirstchild}
 332
 333 \constfunc{wxTreeItemId}{GetFirstChild}{\param{const wxTreeItemId\&}{ item}, \param{long\& }{cookie}}
 334
 335 Returns the first child; call \helpref{wxTreeCtrl::GetNextChild}{wxtreectrlgetnextchild} for the next child.
 336
 337 For this enumeration function you must pass in a `cookie' parameter
 338 which is opaque for the application but is necessary for the library
 339 to make these functions reentrant (i.e. allow more than one
 340 enumeration on one and the same object simultaneously). The cookie passed to
 341 GetFirstChild and GetNextChild should be the same.
 342
 343 Returns an invalid tree item if there are no further children.
 344
 345 \wxheading{See also}
 346
 347 \helpref{wxTreeCtrl::GetNextChild}{wxtreectrlgetnextchild}
 348
 349 \pythonnote{In wxPython the returned wxTreeItemId and the new cookie
 350 value are both returned as a tuple containing the two values.}
 351
 352 \perlnote{In wxPerl this method only takes the {\tt item} parameter, and
 353   returns a 2-element list ( item, cookie ).}
 354
 355 \membersection{wxTreeCtrl::GetFirstVisibleItem}\label{wxtreectrlgetfirstvisibleitem}
 356
 357 \constfunc{wxTreeItemId}{GetFirstVisibleItem}{\void}
 358
 359 Returns the first visible item.
 360
 361 \membersection{wxTreeCtrl::GetImageList}\label{wxtreectrlgetimagelist}
 362
 363 \constfunc{wxImageList*}{GetImageList}{\void}
 364
 365 Returns the normal image list.
 366
 367 \membersection{wxTreeCtrl::GetIndent}\label{wxtreectrlgetindent}
 368
 369 \constfunc{int}{GetIndent}{\void}
 370
 371 Returns the current tree control indentation.
 372
 373 \membersection{wxTreeCtrl::GetItemData}\label{wxtreectrlgetitemdata}
 374
 375 \constfunc{wxTreeItemData*}{GetItemData}{\param{const wxTreeItemId\&}{ item}}
 376
 377 Returns the tree item data associated with the item.
 378
 379 \wxheading{See also}
 380
 381 \helpref{wxTreeItemData}{wxtreeitemdata}
 382
 383 \pythonnote{wxPython provides the following shortcut method:
 384
 385 \indented{2cm}{\begin{twocollist}\itemsep=0pt
 386 \twocolitem{{\bf GetPyData(item)}}{Returns the Python Object
 387 associated with the wxTreeItemData for the given item Id.}
 388 \end{twocollist}}
 389 }
 390
 391 \perlnote{wxPerl provides the following shortcut method:
 392 \indented{2cm}{
 393 \begin{twocollist}\itemsep=0pt
 394 \twocolitem{{\bf GetPlData( item )}}{Returns the Perl data
 395 associated with the Wx::TreeItemData ( it is just the same as
 396 tree->GetItemData( item )->GetData(); ).}
 397 \end{twocollist}}
 398 }
 399
 400 \membersection{wxTreeCtrl::GetItemImage}\label{wxtreectrlgetitemimage}
 401
 402 \constfunc{int}{GetItemImage}{\param{const wxTreeItemId\& }{item},
 403  \param{wxTreeItemIcon }{which = wxTreeItemIcon\_Normal}}
 404
 405 Gets the specified item image. The value of {\it which} may be:
 406
 407 \begin{itemize}\itemsep=0pt
 408 \item{wxTreeItemIcon\_Normal} to get the normal item image
 409 \item{wxTreeItemIcon\_Selected} to get the selected item image (i.e. the image
 410 which is shown when the item is currently selected)
 411 \item{wxTreeItemIcon\_Expanded} to get the expanded image (this only
 412 makes sense for items which have children - then this image is shown when the
 413 item is expanded and the normal image is shown when it is collapsed)
 414 \item{wxTreeItemIcon\_SelectedExpanded} to get the selected expanded image
 415 (which is shown when an expanded item is currently selected)
 416 \end{itemize}
 417
 418 \membersection{wxTreeCtrl::GetItemText}\label{wxtreectrlgetitemtext}
 419
 420 \constfunc{wxString}{GetItemText}{\param{const wxTreeItemId\&}{ item}}
 421
 422 Returns the item label.
 423
 424 \membersection{wxTreeCtrl::GetLastChild}\label{wxtreectrlgetlastchild}
 425
 426 \constfunc{wxTreeItemId}{GetLastChild}{\param{const wxTreeItemId\&}{ item}}
 427
 428 Returns the last child of the item (or an invalid tree item if this item has no children).
 429
 430 \wxheading{See also}
 431
 432 \helpref{GetFirstChild}{wxtreectrlgetfirstchild},
 433 \helpref{GetLastChild}{wxtreectrlgetlastchild}
 434
 435 \membersection{wxTreeCtrl::GetNextChild}\label{wxtreectrlgetnextchild}
 436
 437 \constfunc{wxTreeItemId}{GetNextChild}{\param{const wxTreeItemId\&}{ item}, \param{long\& }{cookie}}
 438
 439 Returns the next child; call \helpref{wxTreeCtrl::GetFirstChild}{wxtreectrlgetfirstchild} for the first child.
 440
 441 For this enumeration function you must pass in a `cookie' parameter
 442 which is opaque for the application but is necessary for the library
 443 to make these functions reentrant (i.e. allow more than one
 444 enumeration on one and the same object simultaneously). The cookie passed to
 445 GetFirstChild and GetNextChild should be the same.
 446
 447 Returns an invalid tree item if there are no further children.
 448
 449 \wxheading{See also}
 450
 451 \helpref{wxTreeCtrl::GetFirstChild}{wxtreectrlgetfirstchild}
 452
 453 \pythonnote{In wxPython the returned wxTreeItemId and the new cookie
 454 value are both returned as a tuple containing the two values.}
 455
 456 \perlnote{In wxPerl this method returns a 2-element list
 457   ( item, cookie ), instead of modifying its parameters.}
 458
 459 \membersection{wxTreeCtrl::GetNextSibling}\label{wxtreectrlgetnextsibling}
 460
 461 \constfunc{wxTreeItemId}{GetNextSibling}{\param{const wxTreeItemId\&}{ item}}
 462
 463 Returns the next sibling of the specified item; call \helpref{wxTreeCtrl::GetPrevSibling}{wxtreectrlgetprevsibling} for the previous sibling.
 464
 465 Returns an invalid tree item if there are no further siblings.
 466
 467 \wxheading{See also}
 468
 469 \helpref{wxTreeCtrl::GetPrevSibling}{wxtreectrlgetprevsibling}
 470
 471 \membersection{wxTreeCtrl::GetNextVisible}\label{wxtreectrlgetnextvisible}
 472
 473 \constfunc{wxTreeItemId}{GetNextVisible}{\param{const wxTreeItemId\&}{ item}}
 474
 475 Returns the next visible item.
 476
 477 \membersection{wxTreeCtrl::GetParent}\label{wxtreectrlgetparent}
 478
 479 \constfunc{wxTreeItemId}{GetParent}{\param{const wxTreeItemId\&}{ item}}
 480
 481 Returns the item's parent.
 482
 483 \pythonnote{This method is named {\tt GetItemParent} to avoid a name
 484 clash with wxWindow::GetParent.}
 485
 486 \membersection{wxTreeCtrl::GetPrevSibling}\label{wxtreectrlgetprevsibling}
 487
 488 \constfunc{wxTreeItemId}{GetPrevSibling}{\param{const wxTreeItemId\&}{ item}}
 489
 490 Returns the previous sibling of the specified item; call \helpref{wxTreeCtrl::GetNextSibling}{wxtreectrlgetnextsibling} for the next sibling.
 491
 492 Returns an invalid tree item if there are no further children.
 493
 494 \wxheading{See also}
 495
 496 \helpref{wxTreeCtrl::GetNextSibling}{wxtreectrlgetnextsibling}
 497
 498 \membersection{wxTreeCtrl::GetPrevVisible}\label{wxtreectrlgetprevvisible}
 499
 500 \constfunc{wxTreeItemId}{GetPrevVisible}{\param{const wxTreeItemId\&}{ item}}
 501
 502 Returns the previous visible item.
 503
 504 \membersection{wxTreeCtrl::GetRootItem}\label{wxtreectrlgetrootitem}
 505
 506 \constfunc{wxTreeItemId}{GetRootItem}{\void}
 507
 508 Returns the root item for the tree control.
 509
 510 \membersection{wxTreeCtrl::GetItemSelectedImage}\label{wxtreectrlgetitemselectedimage}
 511
 512 \constfunc{int}{GetItemSelectedImage}{\param{const wxTreeItemId\& }{item}}
 513
 514 Gets the selected item image (this function is obsolete, use
 515 {\tt GetItemImage(item, wxTreeItemIcon\_Selected}) instead).
 516
 517 \membersection{wxTreeCtrl::GetSelection}\label{wxtreectrlgetselection}
 518
 519 \constfunc{wxTreeItemId}{GetSelection}{\void}
 520
 521 Returns the selection, or an invalid item if there is no selection.
 522 This function only works with the controls without wxTR\_MULTIPLE style, use
 523 \helpref{GetSelections}{wxtreectrlgetselections} for the controls which do have
 524 this style.
 525
 526 \membersection{wxTreeCtrl::GetSelections}\label{wxtreectrlgetselections}
 527
 528 \constfunc{size\_t}{GetSelections}{\param{wxArrayTreeItemIds\& }{selection}}
 529
 530 Fills the array of tree items passed in with the currently selected items. This
 531 function can be called only if the control has the wxTR\_MULTIPLE style.
 532
 533 Returns the number of selected items.
 534
 535 \pythonnote{The wxPython version of this method accepts no parameters
 536 and returns a Python list of {\tt wxTreeItemId}s.}
 537
 538 \perlnote{In wxPerl this method takes no parameters and returns a list of
 539  {\tt Wx::TreeItemId}s.}
 540
 541 \membersection{wxTreeCtrl::GetStateImageList}\label{wxtreectrlgetstateimagelist}
 542
 543 \constfunc{wxImageList*}{GetStateImageList}{\void}
 544
 545 Returns the state image list (from which application-defined state images are taken).
 546
 547 \membersection{wxTreeCtrl::HitTest}\label{wxtreectrlhittest}
 548
 549 \func{wxTreeItemId}{HitTest}{\param{const wxPoint\& }{point}, \param{int\& }{flags}}
 550
 551 Calculates which (if any) item is under the given point, returning the tree item
 552 id at this point plus extra information {\it flags}. {\it flags} is a bitlist of the following:
 553
 554 \twocolwidtha{5cm}
 555 \begin{twocollist}\itemsep=0pt
 556 \twocolitem{wxTREE\_HITTEST\_ABOVE}{Above the client area.}
 557 \twocolitem{wxTREE\_HITTEST\_BELOW}{Below the client area.}
 558 \twocolitem{wxTREE\_HITTEST\_NOWHERE}{In the client area but below the last item.}
 559 \twocolitem{wxTREE\_HITTEST\_ONITEMBUTTON}{On the button associated with an item.}
 560 \twocolitem{wxTREE\_HITTEST\_ONITEMICON}{On the bitmap associated with an item.}
 561 \twocolitem{wxTREE\_HITTEST\_ONITEMINDENT}{In the indentation associated with an item.}
 562 \twocolitem{wxTREE\_HITTEST\_ONITEMLABEL}{On the label (string) associated with an item.}
 563 \twocolitem{wxTREE\_HITTEST\_ONITEMRIGHT}{In the area to the right of an item.}
 564 \twocolitem{wxTREE\_HITTEST\_ONITEMSTATEICON}{On the state icon for a tree view item that is in a user-defined state.}
 565 \twocolitem{wxTREE\_HITTEST\_TOLEFT}{To the right of the client area.}
 566 \twocolitem{wxTREE\_HITTEST\_TORIGHT}{To the left of the client area.}
 567 \end{twocollist}
 568
 569 \pythonnote{in wxPython both the wxTreeItemId and the flags are
 570 returned as a tuple.}
 571
 572 \perlnote{In wxPerl this method only takes the {\tt point} parameter
 573   and returns a 2-element list ( item, flags ).}
 574
 575 \membersection{wxTreeCtrl::InsertItem}\label{wxtreectrlinsertitem}
 576
 577 \func{wxTreeItemId}{InsertItem}{\param{const wxTreeItemId\& }{parent}, \param{const wxTreeItemId\& }{previous}, \param{const wxString\&}{ text},
 578  \param{int}{ image = -1}, \param{int}{ selImage = -1}, \param{wxTreeItemData*}{ data = NULL}}
 579
 580 \func{wxTreeItemId}{InsertItem}{\param{const wxTreeItemId\& }{parent}, \param{size\_t}{ before}, \param{const wxString\&}{ text},
 581  \param{int}{ image = -1}, \param{int}{ selImage = -1}, \param{wxTreeItemData*}{ data = NULL}}
 582
 583 Inserts an item after a given one ({\it previous}) or before one identified by its position ({\it before}).
 584
 585 The {\it image} and {\it selImage} parameters are an index within
 586 the normal image list specifying the image to use for unselected and
 587 selected items, respectively.
 588 If {\it image} > -1 and {\it selImage} is -1, the same image is used for
 589 both selected and unselected items.
 590
 591 \pythonnote{The second form of this method is called
 592 \tt{InsertItemBefore} in wxPython.}
 593
 594 \membersection{wxTreeCtrl::IsBold}\label{wxtreectrlisbold}
 595
 596 \constfunc{bool}{IsBold}{\param{const wxTreeItemId\& }{item}}
 597
 598 Returns TRUE if the given item is in bold state.
 599
 600 See also: \helpref{SetItemBold}{wxtreectrlsetitembold}
 601
 602 \membersection{wxTreeCtrl::IsExpanded}\label{wxtreectrlisexpanded}
 603
 604 \constfunc{bool}{IsExpanded}{\param{const wxTreeItemId\&}{ item}}
 605
 606 Returns TRUE if the item is expanded (only makes sense if it has children).
 607
 608 \membersection{wxTreeCtrl::IsSelected}\label{wxtreectrlisselected}
 609
 610 \constfunc{bool}{IsSelected}{\param{const wxTreeItemId\&}{ item}}
 611
 612 Returns TRUE if the item is selected.
 613
 614 \membersection{wxTreeCtrl::IsVisible}\label{wxtreectrlisvisible}
 615
 616 \constfunc{bool}{IsVisible}{\param{const wxTreeItemId\&}{ item}}
 617
 618 Returns TRUE if the item is visible (it might be outside the view, or not expanded).
 619
 620 \membersection{wxTreeCtrl::ItemHasChildren}\label{wxtreectrlitemhaschildren}
 621
 622 \constfunc{bool}{ItemHasChildren}{\param{const wxTreeItemId\&}{ item}}
 623
 624 Returns TRUE if the item has children.
 625
 626 \membersection{wxTreeCtrl::OnCompareItems}\label{wxtreectrloncompareitems}
 627
 628 \func{int}{OnCompareItems}{\param{const wxTreeItemId\& }{item1}, \param{const wxTreeItemId\& }{item2}}
 629
 630 Override this function in the derived class to change the sort order of the
 631 items in the tree control. The function should return a negative, zero or
 632 positive value if the first item is less than, equal to or greater than the
 633 second one.
 634
 635 The base class version compares items alphabetically.
 636
 637 See also: \helpref{SortChildren}{wxtreectrlsortchildren}
 638
 639 \membersection{wxTreeCtrl::PrependItem}\label{wxtreectrlprependitem}
 640
 641 \func{wxTreeItemId}{PrependItem}{\param{const wxTreeItemId\& }{parent}, \param{const wxString\&}{ text},
 642  \param{int}{ image = -1}, \param{int}{ selImage = -1}, \param{wxTreeItemData*}{ data = NULL}}
 643
 644 Appends an item as the first child of {\it parent}, return a new item id.
 645
 646 The {\it image} and {\it selImage} parameters are an index within
 647 the normal image list specifying the image to use for unselected and
 648 selected items, respectively.
 649 If {\it image} > -1 and {\it selImage} is -1, the same image is used for
 650 both selected and unselected items.
 651
 652 \membersection{wxTreeCtrl::ScrollTo}\label{wxtreectrlscrollto}
 653
 654 \func{void}{ScrollTo}{\param{const wxTreeItemId\&}{ item}}
 655
 656 Scrolls the specified item into view.
 657
 658 \membersection{wxTreeCtrl::SelectItem}\label{wxtreectrlselectitem}
 659
 660 \func{bool}{SelectItem}{\param{const wxTreeItemId\&}{ item}}
 661
 662 Selects the given item.
 663
 664 \membersection{wxTreeCtrl::SetButtonsImageList}\label{wxtreectrlsetbuttonsimagelist}
 665
 666 \func{void}{SetButtonsImageList}{\param{wxImageList*}{ imageList}}
 667
 668 Sets the buttons image list (from which application-defined button images are taken).
 669 The button images assigned with this method will
 670 {\bf not} be deleted by wxTreeCtrl's destructor, you must delete it yourself.
 671
 672 Setting or assigning the button image list enables the display of image buttons.
 673 Once enabled, the only way to disable the display of button images is to set
 674 the button image list to NULL.
 675
 676 This function is only available in the generic version.
 677
 678 See also \helpref{AssignButtonsImageList}{wxtreectrlassignbuttonsimagelist}.
 679
 680 \membersection{wxTreeCtrl::SetIndent}\label{wxtreectrlsetindent}
 681
 682 \func{void}{SetIndent}{\param{int }{indent}}
 683
 684 Sets the indentation for the tree control.
 685
 686 \membersection{wxTreeCtrl::SetImageList}\label{wxtreectrlsetimagelist}
 687
 688 \func{void}{SetImageList}{\param{wxImageList*}{ imageList}}
 689
 690 Sets the normal image list. Image list assigned with this method will
 691 {\bf not} be deleted by wxTreeCtrl's destructor, you must delete it yourself.
 692
 693 See also \helpref{AssignImageList}{wxtreectrlassignimagelist}.
 694
 695
 696 \membersection{wxTreeCtrl::SetItemBackgroundColour}\label{wxtreectrlsetitembackgroundcolour}
 697
 698 \func{void}{SetItemBackgroundColour}{\param{const wxTreeItemId\&}{ item}, \param{const wxColour\& }{col}}
 699
 700 Sets the colour of the item's background.
 701
 702 \membersection{wxTreeCtrl::SetItemBold}\label{wxtreectrlsetitembold}
 703
 704 \func{void}{SetItemBold}{\param{const wxTreeItemId\& }{item}, \param{bool}{ bold = TRUE}}
 705
 706 Makes item appear in bold font if {\it bold} parameter is TRUE or resets it to
 707 the normal state.
 708
 709 See also: \helpref{IsBold}{wxtreectrlisbold}
 710
 711 \membersection{wxTreeCtrl::SetItemData}\label{wxtreectrlsetitemdata}
 712
 713 \func{void}{SetItemData}{\param{const wxTreeItemId\&}{ item}, \param{wxTreeItemData* }{data}}
 714
 715 Sets the item client data.
 716
 717 \pythonnote{wxPython provides the following shortcut method:\par
 718 \indented{2cm}{\begin{twocollist}\itemsep=0pt
 719 \twocolitem{{\bf SetPyData(item, obj)}}{Associate the given Python
 720 Object with the wxTreeItemData for the given item Id.}
 721 \end{twocollist}}
 722 }
 723
 724 \perlnote{wxPerl provides the following shortcut method:
 725 \indented{2cm}{
 726 \begin{twocollist}\itemsep=0pt
 727 \twocolitem{{\bf SetPlData( item, data )}}{Sets the Perl data
 728 associated with the Wx::TreeItemData ( it is just the same as
 729 tree->GetItemData( item )->SetData( data ); ).}
 730 \end{twocollist}}
 731 }
 732
 733 \membersection{wxTreeCtrl::SetItemFont}\label{wxtreectrlsetitemfont}
 734
 735 \func{void}{SetItemFont}{\param{const wxTreeItemId\&}{ item}, \param{const wxFont\& }{font}}
 736
 737 Sets the item's font. All items in the tree should have the same height to avoid
 738 text clipping, so the fonts height should be the same for all of them,
 739 although font attributes may vary.
 740
 741 \wxheading{See also}
 742
 743 \helpref{SetItemBold}{wxtreectrlsetitembold}
 744
 745 \membersection{wxTreeCtrl::SetItemHasChildren}\label{wxtreectrlsetitemhaschildren}
 746
 747 \func{void}{SetItemHasChildren}{\param{const wxTreeItemId\&}{ item}, \param{bool }{hasChildren = TRUE}}
 748
 749 Force appearance of the button next to the item. This is useful to
 750 allow the user to expand the items which don't have any children now,
 751 but instead adding them only when needed, thus minimizing memory
 752 usage and loading time.
 753
 754 \membersection{wxTreeCtrl::SetItemImage}\label{wxtreectrlsetitemimage}
 755
 756 \func{void}{SetItemImage}{\param{const wxTreeItemId\&}{ item},
 757  \param{int }{image}, \param{wxTreeItemIcon }{which = wxTreeItemIcon\_Normal}}
 758
 759 Sets the specified item image. See \helpref{GetItemImage}{wxtreectrlgetitemimage}
 760 for the description of the {\it which} parameter.
 761
 762 \membersection{wxTreeCtrl::SetItemSelectedImage}\label{wxtreectrlsetitemselectedimage}
 763
 764 \func{void}{SetItemSelectedImage}{\param{const wxTreeItemId\&}{ item}, \param{int }{selImage}}
 765
 766 Sets the selected item image (this function is obsolete, use {\tt SetItemImage(item, wxTreeItemIcon\_Selected}) instead).
 767
 768 \membersection{wxTreeCtrl::SetItemText}\label{wxtreectrlsetitemtext}
 769
 770 \func{void}{SetItemText}{\param{const wxTreeItemId\&}{ item}, \param{const wxString\& }{text}}
 771
 772 Sets the item label.
 773
 774 \membersection{wxTreeCtrl::SetItemTextColour}\label{wxtreectrlsetitemtextcolour}
 775
 776 \func{void}{SetItemTextColour}{\param{const wxTreeItemId\&}{ item}, \param{const wxColour\& }{col}}
 777
 778 Sets the colour of the item's text.
 779
 780 \membersection{wxTreeCtrl::SetStateImageList}\label{wxtreectrlsetstateimagelist}
 781
 782 \func{void}{SetStateImageList}{\param{wxImageList*}{ imageList}}
 783
 784 Sets the state image list (from which application-defined state images are taken).
 785 Image list assigned with this method will
 786 {\bf not} be deleted by wxTreeCtrl's destructor, you must delete it yourself.
 787
 788 See also \helpref{AssignStateImageList}{wxtreectrlassignstateimagelist}.
 789
 790 \func{void}{SetWindowStyle}{\param{long}{styles}}
 791
 792 Sets the mode flags associated with the display of the tree control.
 793 The new mode takes effect immediately.
 794 (Generic only; MSW ignores changes.)
 795
 796 \membersection{wxTreeCtrl::SortChildren}\label{wxtreectrlsortchildren}
 797
 798 \func{void}{SortChildren}{\param{const wxTreeItemId\&}{ item}}
 799
 800 Sorts the children of the given item using
 801 \helpref{OnCompareItems}{wxtreectrloncompareitems} method of wxTreeCtrl. You
 802 should override that method to change the sort order (the default is ascending
 803 alphabetical order).
 804
 805 \wxheading{See also}
 806
 807 \helpref{wxTreeItemData}{wxtreeitemdata}, \helpref{OnCompareItems}{wxtreectrloncompareitems}
 808
 809 \membersection{wxTreeCtrl::Toggle}\label{wxtreectrltoggle}
 810
 811 \func{void}{Toggle}{\param{const wxTreeItemId\&}{ item}}
 812
 813 Toggles the given item between collapsed and expanded states.
 814
 815 \membersection{wxTreeCtrl::Unselect}\label{wxtreectrlunselect}
 816
 817 \func{void}{Unselect}{\void}
 818
 819 Removes the selection from the currently selected item (if any).
 820
 821 \membersection{wxTreeCtrl::UnselectAll}\label{wxtreectrlunselectall}
 822
 823 \func{void}{UnselectAll}{\void}
 824
 825 This function either behaves the same as \helpref{Unselect}{wxtreectrlunselect}
 826 if the control doesn't have wxTR\_MULTIPLE style, or removes the selection from
 827 all items if it does have this style.
 828