-spec addRoot(This, Text, [Option]) -> integer()
                 when
                     This :: wxTreeCtrl(),
                     Text :: unicode:chardata(),
                     Option :: {image, integer()} | {selectedImage, integer()} | {data, term()}.

Adds the root node to the tree, returning the new item.

The image and selImage parameters are an index within the normal image list specifying the image to use for unselected and selected items, respectively. If image > -1 and selImage is -1, the same image is used for both selected and unselected items.

-spec appendItem(This, Parent, Text, [Option]) -> integer()
                    when
                        This :: wxTreeCtrl(),
                        Parent :: integer(),
                        Text :: unicode:chardata(),
                        Option :: {image, integer()} | {selectedImage, integer()} | {data, term()}.

Appends an item to the end of the branch identified by parent, return a new item id.

The image and selImage parameters are an index within the normal image list specifying the image to use for unselected and selected items, respectively. If image > -1 and selImage is -1, the same image is used for both selected and unselected items.

-spec assignImageList(This, ImageList) -> ok
                         when This :: wxTreeCtrl(), ImageList :: wxImageList:wxImageList().

Sets the normal image list.

The image list assigned with this method will be automatically deleted by wxTreeCtrl as appropriate (i.e. it takes ownership of the list).

See: setImageList/2

-spec assignStateImageList(This, ImageList) -> ok
                              when This :: wxTreeCtrl(), ImageList :: wxImageList:wxImageList().

Sets the state image list.

Image list assigned with this method will be automatically deleted by wxTreeCtrl as appropriate (i.e. it takes ownership of the list).

See: setStateImageList/2

-spec collapse(This, Item) -> ok when This :: wxTreeCtrl(), Item :: integer().

Collapses the given item.

-spec collapseAndReset(This, Item) -> ok when This :: wxTreeCtrl(), Item :: integer().

Collapses the given item and removes all children.

-spec create(This, Parent, [Option]) -> boolean()
                when
                    This :: wxTreeCtrl(),
                    Parent :: wxWindow:wxWindow(),
                    Option ::
                        {id, integer()} |
                        {pos, {X :: integer(), Y :: integer()}} |
                        {size, {W :: integer(), H :: integer()}} |
                        {style, integer()} |
                        {validator, wx:wx_object()}.

Creates the tree control.

See new/2 for further details.

-spec delete(This, Item) -> ok when This :: wxTreeCtrl(), Item :: integer().

Deletes the specified item.

A EVT_TREE_DELETE_ITEM event will be generated.

This function may cause a subsequent call to getNextChild/3 to fail.

-spec deleteAllItems(This) -> ok when This :: wxTreeCtrl().

Deletes all items in the control.

This function generates wxEVT_TREE_DELETE_ITEM events for each item being deleted, including the root one if it is shown, i.e. unless wxTR_HIDE_ROOT style is used.

-spec deleteChildren(This, Item) -> ok when This :: wxTreeCtrl(), Item :: integer().

Deletes all children of the given item (but not the item itself).

A wxEVT_TREE_DELETE_ITEM event will be generated for every item being deleted.

If you have called setItemHasChildren/3, you may need to call it again since deleteChildren/2 does not automatically clear the setting.

-spec destroy(This :: wxTreeCtrl()) -> ok.

Destructor, destroying the tree control.

-spec editLabel(This, Item) -> wxTextCtrl:wxTextCtrl() when This :: wxTreeCtrl(), Item :: integer().

Starts editing the label of the given item.

This function generates a EVT_TREE_BEGIN_LABEL_EDIT event which can be vetoed so that no text control will appear for in-place editing.

If the user changed the label (i.e. s/he does not press ESC or leave the text control without changes, a EVT_TREE_END_LABEL_EDIT event will be sent which can be vetoed as well.

See: EndEditLabel() (not implemented in wx), wxTreeEvent

-spec ensureVisible(This, Item) -> ok when This :: wxTreeCtrl(), Item :: integer().

Scrolls and/or expands items to ensure that the given item is visible.

This method can be used, and will work, even while the window is frozen (see wxWindow:freeze/1).

-spec expand(This, Item) -> ok when This :: wxTreeCtrl(), Item :: integer().

Expands the given item.

-spec getBoundingRect(This, Item, [Option]) -> Result
                         when
                             Result ::
                                 {Res :: boolean(),
                                  Rect ::
                                      {X :: integer(), Y :: integer(), W :: integer(), H :: integer()}},
                             This :: wxTreeCtrl(),
                             Item :: integer(),
                             Option :: {textOnly, boolean()}.

Retrieves the rectangle bounding the item.

If textOnly is true, only the rectangle around the item's label will be returned, otherwise the item's image is also taken into account.

The return value is true if the rectangle was successfully retrieved or false if it was not (in this case rect is not changed) - for example, if the item is currently invisible.

Notice that the rectangle coordinates are logical, not physical ones. So, for example, the x coordinate may be negative if the tree has a horizontal scrollbar and its position is not 0.

-spec getChildrenCount(This, Item, [Option]) -> integer()
                          when
                              This :: wxTreeCtrl(),
                              Item :: integer(),
                              Option :: {recursively, boolean()}.

Returns the number of items in the branch.

If recursively is true, returns the total number of descendants, otherwise only one level of children is counted.

-spec getCount(This) -> integer() when This :: wxTreeCtrl().

Returns the number of items in the control.

-spec getEditControl(This) -> wxTextCtrl:wxTextCtrl() when This :: wxTreeCtrl().

Returns the edit control being currently used to edit a label.

Returns NULL if no label is being edited.

Note: This is currently only implemented for wxMSW.

-spec getFirstChild(This, Item) -> Result
                       when
                           Result :: {Res :: integer(), Cookie :: integer()},
                           This :: wxTreeCtrl(),
                           Item :: integer().

Returns the first child; call getNextChild/3 for the next child.

For this enumeration function you must pass in a 'cookie' parameter which is opaque for the application but is necessary for the library to make these functions reentrant (i.e. allow more than one enumeration on one and the same object simultaneously). The cookie passed to getFirstChild/2 and getNextChild/3 should be the same variable.

Returns an invalid tree item (i.e. wxTreeItemId::IsOk() (not implemented in wx) returns false) if there are no further children.

See: getNextChild/3, getNextSibling/2

-spec getFirstVisibleItem(This) -> integer() when This :: wxTreeCtrl().

Returns the first visible item.

-spec getImageList(This) -> wxImageList:wxImageList() when This :: wxTreeCtrl().

Returns the normal image list.

-spec getIndent(This) -> integer() when This :: wxTreeCtrl().

Returns the current tree control indentation.

-spec getItemBackgroundColour(This, Item) -> wx:wx_colour4()
                                 when This :: wxTreeCtrl(), Item :: integer().

Returns the background colour of the item.

-spec getItemData(This, Item) -> term() when This :: wxTreeCtrl(), Item :: integer().

Returns the tree item data associated with the item.

See: wxTreeItemData (not implemented in wx)

-spec getItemFont(This, Item) -> wxFont:wxFont() when This :: wxTreeCtrl(), Item :: integer().

Returns the font of the item label.

If the font hadn't been explicitly set for the specified item with setItemFont/3, returns an invalid ?wxNullFont font. wxWindow:getFont/1 can be used to retrieve the global tree control font used for the items without any specific font.

-spec getItemImage(This, Item, [Option]) -> integer()
                      when This :: wxTreeCtrl(), Item :: integer(), Option :: {which, wx:wx_enum()}.

Gets the specified item image.

The value of which may be:

-spec getItemParent(This, Item) -> integer() when This :: wxTreeCtrl(), Item :: integer().

Returns the item's parent.

-spec getItemText(This, Item) -> unicode:charlist() when This :: wxTreeCtrl(), Item :: integer().

Returns the item label.

-spec getItemTextColour(This, Item) -> wx:wx_colour4() when This :: wxTreeCtrl(), Item :: integer().

Returns the colour of the item label.

-spec getLastChild(This, Item) -> integer() when This :: wxTreeCtrl(), Item :: integer().

Returns the last child of the item (or an invalid tree item if this item has no children).

See: getFirstChild/2, getNextSibling/2, getLastChild/2

-spec getNextChild(This, Item, Cookie) -> Result
                      when
                          Result :: {Res :: integer(), Cookie :: integer()},
                          This :: wxTreeCtrl(),
                          Item :: integer(),
                          Cookie :: integer().

Returns the next child; call getFirstChild/2 for the first child.

For this enumeration function you must pass in a 'cookie' parameter which is opaque for the application but is necessary for the library to make these functions reentrant (i.e. allow more than one enumeration on one and the same object simultaneously). The cookie passed to getFirstChild/2 and getNextChild/3 should be the same.

Returns an invalid tree item if there are no further children.

See: getFirstChild/2

-spec getNextSibling(This, Item) -> integer() when This :: wxTreeCtrl(), Item :: integer().

Returns the next sibling of the specified item; call getPrevSibling/2 for the previous sibling.

Returns an invalid tree item if there are no further siblings.

See: getPrevSibling/2

-spec getNextVisible(This, Item) -> integer() when This :: wxTreeCtrl(), Item :: integer().

Returns the next visible item or an invalid item if this item is the last visible one.

Note: The item itself must be visible.

-spec getPrevSibling(This, Item) -> integer() when This :: wxTreeCtrl(), Item :: integer().

Returns the previous sibling of the specified item; call getNextSibling/2 for the next sibling.

Returns an invalid tree item if there are no further children.

See: getNextSibling/2

-spec getPrevVisible(This, Item) -> integer() when This :: wxTreeCtrl(), Item :: integer().

Returns the previous visible item or an invalid item if this item is the first visible one.

Note: The item itself must be visible.

-spec getRootItem(This) -> integer() when This :: wxTreeCtrl().

Returns the root item for the tree control.

-spec getSelection(This) -> integer() when This :: wxTreeCtrl().

Returns the selection, or an invalid item if there is no selection.

This function only works with the controls without wxTR_MULTIPLE style, use getSelections/1 for the controls which do have this style or, if a single item is wanted, use GetFocusedItem() (not implemented in wx).

-spec getSelections(This) -> Result
                       when Result :: {Res :: integer(), Selection :: [integer()]}, This :: wxTreeCtrl().

Fills the array of tree items passed in with the currently selected items.

This function can be called only if the control has the wxTR_MULTIPLE style.

Returns the number of selected items.

-spec getStateImageList(This) -> wxImageList:wxImageList() when This :: wxTreeCtrl().

Returns the state image list (from which application-defined state images are taken).

-spec hitTest(This, Point) -> Result
                 when
                     Result :: {Res :: integer(), Flags :: integer()},
                     This :: wxTreeCtrl(),
                     Point :: {X :: integer(), Y :: integer()}.

Calculates which (if any) item is under the given point, returning the tree item id at this point plus extra information flags.

flags is a bitlist of the following:

-spec insertItem(This, Parent, Previous, Text, [Option]) -> integer()
                    when
                        This :: wxTreeCtrl(),
                        Parent :: integer(),
                        Previous :: integer(),
                        Text :: unicode:chardata(),
                        Option :: {image, integer()} | {selImage, integer()} | {data, term()}.

Inserts an item after a given one (previous).

The image and selImage parameters are an index within the normal image list specifying the image to use for unselected and selected items, respectively. If image > -1 and selImage is -1, the same image is used for both selected and unselected items.

-spec isBold(This, Item) -> boolean() when This :: wxTreeCtrl(), Item :: integer().

Returns true if the given item is in bold state.

See: setItemBold/3

-spec isExpanded(This, Item) -> boolean() when This :: wxTreeCtrl(), Item :: integer().

Returns true if the item is expanded (only makes sense if it has children).

-spec isSelected(This, Item) -> boolean() when This :: wxTreeCtrl(), Item :: integer().

Returns true if the item is selected.

-spec isTreeItemIdOk(Item) -> boolean() when Item :: integer().

Returns true if the item is valid.

-spec isVisible(This, Item) -> boolean() when This :: wxTreeCtrl(), Item :: integer().

Returns true if the item is visible on the screen.

-spec itemHasChildren(This, Item) -> boolean() when This :: wxTreeCtrl(), Item :: integer().

Returns true if the item has children.

-spec new() -> wxTreeCtrl().

Default Constructor.

-spec new(Parent, [Option]) -> wxTreeCtrl()
             when
                 Parent :: wxWindow:wxWindow(),
                 Option ::
                     {id, integer()} |
                     {pos, {X :: integer(), Y :: integer()}} |
                     {size, {W :: integer(), H :: integer()}} |
                     {style, integer()} |
                     {validator, wx:wx_object()}.

Constructor, creating and showing a tree control.

See: create/3, wxValidator (not implemented in wx)

-spec prependItem(This, Parent, Text, [Option]) -> integer()
                     when
                         This :: wxTreeCtrl(),
                         Parent :: integer(),
                         Text :: unicode:chardata(),
                         Option :: {image, integer()} | {selectedImage, integer()} | {data, term()}.

Appends an item as the first child of parent, return a new item id.

The image and selImage parameters are an index within the normal image list specifying the image to use for unselected and selected items, respectively. If image > -1 and selImage is -1, the same image is used for both selected and unselected items.

-spec scrollTo(This, Item) -> ok when This :: wxTreeCtrl(), Item :: integer().

Scrolls the specified item into view.

Note that this method doesn't work while the window is frozen (See wxWindow:freeze/1), at least under MSW.

See: ensureVisible/2

-spec selectItem(This, Item, [Option]) -> ok
                    when This :: wxTreeCtrl(), Item :: integer(), Option :: {select, boolean()}.

Selects the given item.

In multiple selection controls, can be also used to deselect a currently selected item if the value of select is false.

Notice that calling this method will generate wxEVT_TREE_SEL_CHANGING and wxEVT_TREE_SEL_CHANGED events and that the change could be vetoed by the former event handler.

-spec setImageList(This, ImageList) -> ok
                      when This :: wxTreeCtrl(), ImageList :: wxImageList:wxImageList().

Sets the normal image list.

The image list assigned with this method will not be deleted by wxTreeCtrl's destructor, you must delete it yourself.

See: assignImageList/2

-spec setIndent(This, Indent) -> ok when This :: wxTreeCtrl(), Indent :: integer().

Sets the indentation for the tree control.

-spec setItemBackgroundColour(This, Item, Col) -> ok
                                 when This :: wxTreeCtrl(), Item :: integer(), Col :: wx:wx_colour().

Sets the colour of the item's background.

-spec setItemBold(This, Item, [Option]) -> ok
                     when This :: wxTreeCtrl(), Item :: integer(), Option :: {bold, boolean()}.

Makes item appear in bold font if bold parameter is true or resets it to the normal state.

See: isBold/2

-spec setItemData(This, Item, Data) -> ok when This :: wxTreeCtrl(), Item :: integer(), Data :: term().

Sets the item client data.

Notice that the client data previously associated with the item (if any) is not freed by this function and so calling this function multiple times for the same item will result in memory leaks unless you delete the old item data pointer yourself.

-spec setItemDropHighlight(This, Item, [Option]) -> ok
                              when
                                  This :: wxTreeCtrl(),
                                  Item :: integer(),
                                  Option :: {highlight, boolean()}.

Gives the item the visual feedback for Drag'n'Drop actions, which is useful if something is dragged from the outside onto the tree control (as opposed to a DnD operation within the tree control, which already is implemented internally).

-spec setItemFont(This, Item, Font) -> ok
                     when This :: wxTreeCtrl(), Item :: integer(), Font :: wxFont:wxFont().

Sets the item's font.

All items in the tree should have the same height to avoid text clipping, so the fonts height should be the same for all of them, although font attributes may vary.

See: setItemBold/3

-spec setItemHasChildren(This, Item, [Option]) -> ok
                            when This :: wxTreeCtrl(), Item :: integer(), Option :: {has, boolean()}.

Force appearance of the button next to the item.

This is useful to allow the user to expand the items which don't have any children now, but instead adding them only when needed, thus minimizing memory usage and loading time.

-spec setItemImage(This, Item, Image, [Option]) -> ok
                      when
                          This :: wxTreeCtrl(),
                          Item :: integer(),
                          Image :: integer(),
                          Option :: {which, wx:wx_enum()}.

Sets the specified item's image.

See getItemImage/3 for the description of the which parameter.

-spec setItemText(This, Item, Text) -> ok
                     when This :: wxTreeCtrl(), Item :: integer(), Text :: unicode:chardata().

Sets the item label.

-spec setItemTextColour(This, Item, Col) -> ok
                           when This :: wxTreeCtrl(), Item :: integer(), Col :: wx:wx_colour().

Sets the colour of the item's text.

-spec setStateImageList(This, ImageList) -> ok
                           when This :: wxTreeCtrl(), ImageList :: wxImageList:wxImageList().

Sets the state image list (from which application-defined state images are taken).

Image list assigned with this method will not be deleted by wxTreeCtrl's destructor, you must delete it yourself.

See: assignStateImageList/2

-spec setWindowStyle(This, Styles) -> ok when This :: wxTreeCtrl(), Styles :: integer().

Sets the mode flags associated with the display of the tree control.

The new mode takes effect immediately.

Note: Generic only; MSW ignores changes.

-spec sortChildren(This, Item) -> ok when This :: wxTreeCtrl(), Item :: integer().

Sorts the children of the given item using OnCompareItems() (not implemented in wx).

You should override that method to change the sort order (the default is ascending case-sensitive alphabetical order).

See: wxTreeItemData (not implemented in wx), OnCompareItems() (not implemented in wx)

-spec toggle(This, Item) -> ok when This :: wxTreeCtrl(), Item :: integer().

Toggles the given item between collapsed and expanded states.

-spec toggleItemSelection(This, Item) -> ok when This :: wxTreeCtrl(), Item :: integer().

Toggles the given item between selected and unselected states.

For multiselection controls only.

-spec unselect(This) -> ok when This :: wxTreeCtrl().

Removes the selection from the currently selected item (if any).

-spec unselectAll(This) -> ok when This :: wxTreeCtrl().

This function either behaves the same as unselect/1 if the control doesn't have wxTR_MULTIPLE style, or removes the selection from all items if it does have this style.

-spec unselectItem(This, Item) -> ok when This :: wxTreeCtrl(), Item :: integer().

Unselects the given item.

This works in multiselection controls only.