Version: 2.9.4
Public Member Functions
wxTreeCtrl Class Reference

#include </home/zeitlin/src/wx/github/interface/wx/treectrl.h>

Inheritance diagram for wxTreeCtrl:

Detailed Description

A tree control presents information as a hierarchy, with items that may be expanded to show further items.

Items in a tree control are referenced by wxTreeItemId handles, which may be tested for validity by calling wxTreeItemId::IsOk().

A similar control with a fully native implementation for GTK+ and OS X as well is wxDataViewTreeCtrl.

To intercept events from a tree control, use the event table macros described in wxTreeEvent.

Styles

This class supports the following styles:

Events emitted by this class

The following event handler macros redirect the events to member function handlers 'func' with prototypes like:

void handlerFuncName(wxTreeEvent& event)

Event macros for events emitted by this class:

See also Window Styles.

Win32 notes:

wxTreeCtrl class uses the standard common treeview control under Win32 implemented in the system library comctl32.dll. Some versions of this library are known to have bugs with handling the tree control colours: the usual symptom is that the expanded items leave black (or otherwise incorrectly coloured) background behind them, especially for the controls using non-default background colour. The recommended solution is to upgrade the comctl32.dll to a newer version: see http://www.microsoft.com/downloads/details.aspx?familyid=cb2cf3a2-8025-4e8f-8511-9b476a8d35d2

Library:  wxCore
Category:  Controls

Appearance:
wxMSW appearancewxGTK appearancewxMac appearance
wxMSW appearancewxGTK appearancewxMac appearance
参照:
wxDataViewTreeCtrl, wxTreeEvent, wxTreeItemData, wxTreeCtrl Overview, wxListBox, wxListCtrl, wxImageList

Public Member Functions

 wxTreeCtrl ()
 Default Constructor.
 wxTreeCtrl (wxWindow *parent, wxWindowID id=wxID_ANY, const wxPoint &pos=wxDefaultPosition, const wxSize &size=wxDefaultSize, long style=wxTR_DEFAULT_STYLE, const wxValidator &validator=wxDefaultValidator, const wxString &name=wxTreeCtrlNameStr)
 Constructor, creating and showing a tree control.
virtual ~wxTreeCtrl ()
 Destructor, destroying the tree control.
virtual wxTreeItemId AddRoot (const wxString &text, int image=-1, int selImage=-1, wxTreeItemData *data=NULL)
 Adds the root node to the tree, returning the new item.
wxTreeItemId AppendItem (const wxTreeItemId &parent, const wxString &text, int image=-1, int selImage=-1, wxTreeItemData *data=NULL)
 Appends an item to the end of the branch identified by parent, return a new item id.
void AssignButtonsImageList (wxImageList *imageList)
 Sets the buttons image list.
void AssignImageList (wxImageList *imageList)
 Sets the normal image list.
void AssignStateImageList (wxImageList *imageList)
 Sets the state image list.
virtual void Collapse (const wxTreeItemId &item)
 Collapses the given item.
void CollapseAll ()
 Collapses the root item.
void CollapseAllChildren (const wxTreeItemId &item)
 Collapses this item and all of its children, recursively.
virtual void CollapseAndReset (const wxTreeItemId &item)
 Collapses the given item and removes all children.
bool Create (wxWindow *parent, wxWindowID id=wxID_ANY, const wxPoint &pos=wxDefaultPosition, const wxSize &size=wxDefaultSize, long style=wxTR_DEFAULT_STYLE, const wxValidator &validator=wxDefaultValidator, const wxString &name=wxTreeCtrlNameStr)
 Creates the tree control.
virtual void Delete (const wxTreeItemId &item)
 指定された項目を削除します。
virtual void DeleteAllItems ()
 コントロール内のすべての項目を削除します。
virtual void DeleteChildren (const wxTreeItemId &item)
 Deletes all children of the given item (but not the item itself).
virtual wxTextCtrlEditLabel (const wxTreeItemId &item, wxClassInfo *textCtrlClass=wxCLASSINFO(wxTextCtrl))
 Starts editing the label of the given item.
virtual void EndEditLabel (const wxTreeItemId &item, bool discardChanges=false)
 Ends label editing.
virtual void EnsureVisible (const wxTreeItemId &item)
 Scrolls and/or expands items to ensure that the given item is visible.
virtual void Expand (const wxTreeItemId &item)
 Expands the given item.
void ExpandAll ()
 Expands all items in the tree.
void ExpandAllChildren (const wxTreeItemId &item)
 Expands the given item and all its children recursively.
virtual bool GetBoundingRect (const wxTreeItemId &item, wxRect &rect, bool textOnly=false) const
 Retrieves the rectangle bounding the item.
wxImageListGetButtonsImageList () const
 Returns the buttons image list (from which application-defined button images are taken).
virtual size_t GetChildrenCount (const wxTreeItemId &item, bool recursively=true) const
 Returns the number of items in the branch.
virtual unsigned int GetCount () const
 Returns the number of items in the control.
virtual wxTextCtrlGetEditControl () const
 Returns the edit control being currently used to edit a label.
virtual wxTreeItemId GetFirstChild (const wxTreeItemId &item, wxTreeItemIdValue &cookie) const
 Returns the first child; call GetNextChild() for the next child.
virtual wxTreeItemId GetFirstVisibleItem () const
 Returns the first visible item.
virtual wxTreeItemId GetFocusedItem () const
 Returns the item last clicked or otherwise selected.
virtual void ClearFocusedItem ()
 Clears the currently focused item.
virtual void SetFocusedItem (const wxTreeItemId &item)
 Sets the currently focused item.
wxImageListGetImageList () const
 Returns the normal image list.
virtual unsigned int GetIndent () const
 Returns the current tree control indentation.
virtual wxColour GetItemBackgroundColour (const wxTreeItemId &item) const
 Returns the background colour of the item.
virtual wxTreeItemDataGetItemData (const wxTreeItemId &item) const
 Returns the tree item data associated with the item.
virtual wxFont GetItemFont (const wxTreeItemId &item) const
 Returns the font of the item label.
virtual int GetItemImage (const wxTreeItemId &item, wxTreeItemIcon which=wxTreeItemIcon_Normal) const
 Gets the specified item image.
virtual wxTreeItemId GetItemParent (const wxTreeItemId &item) const
 Returns the item's parent.
int GetItemState (const wxTreeItemId &item) const
 Gets the specified item state.
virtual wxString GetItemText (const wxTreeItemId &item) const
 Returns the item label.
virtual wxColour GetItemTextColour (const wxTreeItemId &item) const
 Returns the colour of the item label.
virtual wxTreeItemId GetLastChild (const wxTreeItemId &item) const
 Returns the last child of the item (or an invalid tree item if this item has no children).
virtual wxTreeItemId GetNextChild (const wxTreeItemId &item, wxTreeItemIdValue &cookie) const
 Returns the next child; call GetFirstChild() for the first child.
virtual wxTreeItemId GetNextSibling (const wxTreeItemId &item) const
 Returns the next sibling of the specified item; call GetPrevSibling() for the previous sibling.
virtual wxTreeItemId GetNextVisible (const wxTreeItemId &item) const
 Returns the next visible item or an invalid item if this item is the last visible one.
virtual wxTreeItemId GetPrevSibling (const wxTreeItemId &item) const
 Returns the previous sibling of the specified item; call GetNextSibling() for the next sibling.
virtual wxTreeItemId GetPrevVisible (const wxTreeItemId &item) const
 Returns the previous visible item or an invalid item if this item is the first visible one.
bool GetQuickBestSize () const
 Returns true if the control will use a quick calculation for the best size, looking only at the first and last items.
virtual wxTreeItemId GetRootItem () const
 Returns the root item for the tree control.
virtual wxTreeItemId GetSelection () const
 Returns the selection, or an invalid item if there is no selection.
virtual size_t GetSelections (wxArrayTreeItemIds &selection) const
 Fills the array of tree items passed in with the currently selected items.
wxImageListGetStateImageList () const
 Returns the state image list (from which application-defined state images are taken).
wxTreeItemId HitTest (const wxPoint &point, int &flags) const
 Calculates which (if any) item is under the given point, returning the tree item id at this point plus extra information flags.
wxTreeItemId InsertItem (const wxTreeItemId &parent, const wxTreeItemId &previous, const wxString &text, int image=-1, int selImage=-1, wxTreeItemData *data=NULL)
 Inserts an item after a given one (previous).
wxTreeItemId InsertItem (const wxTreeItemId &parent, size_t before, const wxString &text, int image=-1, int selImage=-1, wxTreeItemData *data=NULL)
 Inserts an item before one identified by its position (before).
virtual bool IsBold (const wxTreeItemId &item) const
 Returns true if the given item is in bold state.
bool IsEmpty () const
 Returns true if the control is empty (i.e.
virtual bool IsExpanded (const wxTreeItemId &item) const
 Returns true if the item is expanded (only makes sense if it has children).
virtual bool IsSelected (const wxTreeItemId &item) const
 Returns true if the item is selected.
virtual bool IsVisible (const wxTreeItemId &item) const
 Returns true if the item is visible on the screen.
virtual bool ItemHasChildren (const wxTreeItemId &item) const
 Returns true if the item has children.
virtual int OnCompareItems (const wxTreeItemId &item1, const wxTreeItemId &item2)
 Override this function in the derived class to change the sort order of the items in the tree control.
wxTreeItemId PrependItem (const wxTreeItemId &parent, const wxString &text, int image=-1, int selImage=-1, wxTreeItemData *data=NULL)
 Appends an item as the first child of parent, return a new item id.
virtual void ScrollTo (const wxTreeItemId &item)
 Scrolls the specified item into view.
virtual void SelectItem (const wxTreeItemId &item, bool select=true)
 Selects the given item.
void SetButtonsImageList (wxImageList *imageList)
 Sets the buttons image list (from which application-defined button images are taken).
virtual void SetImageList (wxImageList *imageList)
 Sets the normal image list.
virtual void SetIndent (unsigned int indent)
 Sets the indentation for the tree control.
virtual void SetItemBackgroundColour (const wxTreeItemId &item, const wxColour &col)
 Sets the colour of the item's background.
virtual void SetItemBold (const wxTreeItemId &item, bool bold=true)
 Makes item appear in bold font if bold parameter is true or resets it to the normal state.
virtual void SetItemData (const wxTreeItemId &item, wxTreeItemData *data)
 Sets the item client data.
virtual void SetItemDropHighlight (const wxTreeItemId &item, bool highlight=true)
 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).
virtual void SetItemFont (const wxTreeItemId &item, const wxFont &font)
 Sets the item's font.
virtual void SetItemHasChildren (const wxTreeItemId &item, bool hasChildren=true)
 Force appearance of the button next to the item.
virtual void SetItemImage (const wxTreeItemId &item, int image, wxTreeItemIcon which=wxTreeItemIcon_Normal)
 Sets the specified item's image.
void SetItemState (const wxTreeItemId &item, int state)
 Sets the specified item state.
virtual void SetItemText (const wxTreeItemId &item, const wxString &text)
 Sets the item label.
virtual void SetItemTextColour (const wxTreeItemId &item, const wxColour &col)
 Sets the colour of the item's text.
void SetQuickBestSize (bool quickBestSize)
 If true is passed, specifies that the control will use a quick calculation for the best size, looking only at the first and last items.
virtual void SetStateImageList (wxImageList *imageList)
 Sets the state image list (from which application-defined state images are taken).
void SetWindowStyle (long styles)
 Sets the mode flags associated with the display of the tree control.
virtual void SortChildren (const wxTreeItemId &item)
 Sorts the children of the given item using OnCompareItems().
virtual void Toggle (const wxTreeItemId &item)
 Toggles the given item between collapsed and expanded states.
void ToggleItemSelection (const wxTreeItemId &item)
 Toggles the given item between selected and unselected states.
virtual void Unselect ()
 Removes the selection from the currently selected item (if any).
virtual void UnselectAll ()
 This function either behaves the same as Unselect() if the control doesn't have wxTR_MULTIPLE style, or removes the selection from all items if it does have this style.
void UnselectItem (const wxTreeItemId &item)
 Unselects the given item.
virtual void SelectChildren (const wxTreeItemId &parent)
 Select all the immediate children of the given parent.

List of all members.


Constructor & Destructor Documentation

wxTreeCtrl::wxTreeCtrl ( )

Default Constructor.

wxTreeCtrl::wxTreeCtrl ( wxWindow parent,
wxWindowID  id = wxID_ANY,
const wxPoint pos = wxDefaultPosition,
const wxSize size = wxDefaultSize,
long  style = wxTR_DEFAULT_STYLE,
const wxValidator validator = wxDefaultValidator,
const wxString name = wxTreeCtrlNameStr 
)

Constructor, creating and showing a tree control.

Parameters:
parentParent window. Must not be NULL.
idWindow identifier. The value wxID_ANY indicates a default value.
posWindow position. If wxDefaultPosition is specified then a default position is chosen.
sizeWindow size. If wxDefaultSize is specified then the window is sized appropriately.
styleWindow style. See wxTreeCtrl.
validatorWindow validator.
nameWindow name.
参照:
Create(), wxValidator
virtual wxTreeCtrl::~wxTreeCtrl ( ) [virtual]

Destructor, destroying the tree control.


Member Function Documentation

virtual wxTreeItemId wxTreeCtrl::AddRoot ( const wxString text,
int  image = -1,
int  selImage = -1,
wxTreeItemData data = NULL 
) [virtual]

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.

wxTreeItemId wxTreeCtrl::AppendItem ( const wxTreeItemId parent,
const wxString text,
int  image = -1,
int  selImage = -1,
wxTreeItemData data = NULL 
)

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.

void wxTreeCtrl::AssignButtonsImageList ( wxImageList imageList)

Sets the buttons image list.

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

Setting or assigning the button image list enables the display of image buttons. Once enabled, the only way to disable the display of button images is to set the button image list to NULL.

This function is only available in the generic version.

参照:
SetButtonsImageList().
void wxTreeCtrl::AssignImageList ( wxImageList imageList)

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).

参照:
SetImageList().
void wxTreeCtrl::AssignStateImageList ( wxImageList imageList)

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).

参照:
SetStateImageList().
virtual void wxTreeCtrl::ClearFocusedItem ( ) [virtual]

Clears the currently focused item.

Since:
2.9.1
virtual void wxTreeCtrl::Collapse ( const wxTreeItemId item) [virtual]

Collapses the given item.

void wxTreeCtrl::CollapseAll ( )

Collapses the root item.

参照:
ExpandAll()
void wxTreeCtrl::CollapseAllChildren ( const wxTreeItemId item)

Collapses this item and all of its children, recursively.

参照:
ExpandAllChildren()
virtual void wxTreeCtrl::CollapseAndReset ( const wxTreeItemId item) [virtual]

Collapses the given item and removes all children.

bool wxTreeCtrl::Create ( wxWindow parent,
wxWindowID  id = wxID_ANY,
const wxPoint pos = wxDefaultPosition,
const wxSize size = wxDefaultSize,
long  style = wxTR_DEFAULT_STYLE,
const wxValidator validator = wxDefaultValidator,
const wxString name = wxTreeCtrlNameStr 
)

Creates the tree control.

See wxTreeCtrl::wxTreeCtrl() for further details.

Reimplemented from wxControl.

virtual void wxTreeCtrl::Delete ( const wxTreeItemId item) [virtual]

指定された項目を削除します。

A EVT_TREE_DELETE_ITEM event will be generated.

This function may cause a subsequent call to GetNextChild() to fail.

virtual void wxTreeCtrl::DeleteAllItems ( ) [virtual]

コントロール内のすべての項目を削除します。

Note that this may not generate EVT_TREE_DELETE_ITEM events under some Windows versions although normally such event is generated for each removed item.

virtual void wxTreeCtrl::DeleteChildren ( const wxTreeItemId item) [virtual]

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

Note that this will not generate any events unlike Delete() method.

If you have called SetItemHasChildren(), you may need to call it again since DeleteChildren() does not automatically clear the setting.

virtual wxTextCtrl* wxTreeCtrl::EditLabel ( const wxTreeItemId item,
wxClassInfo textCtrlClass = wxCLASSINFO(wxTextCtrl) 
) [virtual]

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.

参照:
EndEditLabel(), wxTreeEvent
virtual void wxTreeCtrl::EndEditLabel ( const wxTreeItemId item,
bool  discardChanges = false 
) [virtual]

Ends label editing.

If cancelEdit is true, the edit will be cancelled.

注:
This function is currently supported under Windows only.
参照:
EditLabel()
virtual void wxTreeCtrl::EnsureVisible ( const wxTreeItemId item) [virtual]

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

virtual void wxTreeCtrl::Expand ( const wxTreeItemId item) [virtual]

Expands the given item.

void wxTreeCtrl::ExpandAll ( )

Expands all items in the tree.

void wxTreeCtrl::ExpandAllChildren ( const wxTreeItemId item)

Expands the given item and all its children recursively.

virtual bool wxTreeCtrl::GetBoundingRect ( const wxTreeItemId item,
wxRect rect,
bool  textOnly = false 
) const [virtual]

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.

wxPerl Note: In wxPerl this method only takes the item and textOnly parameters and returns a Wx::Rect (or undef).

wxImageList* wxTreeCtrl::GetButtonsImageList ( ) const

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

This function is only available in the generic version.

virtual size_t wxTreeCtrl::GetChildrenCount ( const wxTreeItemId item,
bool  recursively = true 
) const [virtual]

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.

virtual unsigned int wxTreeCtrl::GetCount ( ) const [virtual]

Returns the number of items in the control.

virtual wxTextCtrl* wxTreeCtrl::GetEditControl ( ) const [virtual]

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

Returns NULL if no label is being edited.

注:
This is currently only implemented for wxMSW.
virtual wxTreeItemId wxTreeCtrl::GetFirstChild ( const wxTreeItemId item,
wxTreeItemIdValue &  cookie 
) const [virtual]

Returns the first child; call GetNextChild() 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() and GetNextChild() should be the same variable.

Returns an invalid tree item (i.e. wxTreeItemId::IsOk() returns false) if there are no further children.

wxPerl Note: In wxPerl this method only takes the item parameter, and returns a 2-element list (item, cookie).

参照:
GetNextChild(), GetNextSibling()
virtual wxTreeItemId wxTreeCtrl::GetFirstVisibleItem ( ) const [virtual]

Returns the first visible item.

virtual wxTreeItemId wxTreeCtrl::GetFocusedItem ( ) const [virtual]

Returns the item last clicked or otherwise selected.

Unlike GetSelection(), it can be used whether or not the control has the wxTR_MULTIPLE style.

Since:
2.9.1
wxImageList* wxTreeCtrl::GetImageList ( ) const

Returns the normal image list.

virtual unsigned int wxTreeCtrl::GetIndent ( ) const [virtual]

Returns the current tree control indentation.

virtual wxColour wxTreeCtrl::GetItemBackgroundColour ( const wxTreeItemId item) const [virtual]

Returns the background colour of the item.

virtual wxTreeItemData* wxTreeCtrl::GetItemData ( const wxTreeItemId item) const [virtual]

Returns the tree item data associated with the item.

参照:
wxTreeItemData

wxPerl Note: wxPerl provides the following shortcut method:

  • GetPlData(item): returns the Perl data associated with the Wx::TreeItemData. It is just the same as tree->GetItemData(item)->GetData().
virtual wxFont wxTreeCtrl::GetItemFont ( const wxTreeItemId item) const [virtual]

Returns the font of the item label.

virtual int wxTreeCtrl::GetItemImage ( const wxTreeItemId item,
wxTreeItemIcon  which = wxTreeItemIcon_Normal 
) const [virtual]

Gets the specified item image.

The value of which may be:

  • wxTreeItemIcon_Normal: to get the normal item image.
  • wxTreeItemIcon_Selected: to get the selected item image (i.e. the image which is shown when the item is currently selected).
  • wxTreeItemIcon_Expanded: to get the expanded image (this only makes sense for items which have children - then this image is shown when the item is expanded and the normal image is shown when it is collapsed).
  • wxTreeItemIcon_SelectedExpanded: to get the selected expanded image (which is shown when an expanded item is currently selected).
virtual wxTreeItemId wxTreeCtrl::GetItemParent ( const wxTreeItemId item) const [virtual]

Returns the item's parent.

int wxTreeCtrl::GetItemState ( const wxTreeItemId item) const

Gets the specified item state.

virtual wxString wxTreeCtrl::GetItemText ( const wxTreeItemId item) const [virtual]

Returns the item label.

virtual wxColour wxTreeCtrl::GetItemTextColour ( const wxTreeItemId item) const [virtual]

Returns the colour of the item label.

virtual wxTreeItemId wxTreeCtrl::GetLastChild ( const wxTreeItemId item) const [virtual]

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

参照:
GetFirstChild(), GetNextSibling(), GetLastChild()
virtual wxTreeItemId wxTreeCtrl::GetNextChild ( const wxTreeItemId item,
wxTreeItemIdValue &  cookie 
) const [virtual]

Returns the next child; call GetFirstChild() 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() and GetNextChild() should be the same.

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

wxPerl Note: In wxPerl this method returns a 2-element list (item, cookie) instead of modifying its parameters.

参照:
GetFirstChild()
virtual wxTreeItemId wxTreeCtrl::GetNextSibling ( const wxTreeItemId item) const [virtual]

Returns the next sibling of the specified item; call GetPrevSibling() for the previous sibling.

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

参照:
GetPrevSibling()
virtual wxTreeItemId wxTreeCtrl::GetNextVisible ( const wxTreeItemId item) const [virtual]

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

注:
The item itself must be visible.
virtual wxTreeItemId wxTreeCtrl::GetPrevSibling ( const wxTreeItemId item) const [virtual]

Returns the previous sibling of the specified item; call GetNextSibling() for the next sibling.

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

参照:
GetNextSibling()
virtual wxTreeItemId wxTreeCtrl::GetPrevVisible ( const wxTreeItemId item) const [virtual]

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

注:
The item itself must be visible.
bool wxTreeCtrl::GetQuickBestSize ( ) const

Returns true if the control will use a quick calculation for the best size, looking only at the first and last items.

The default is false.

参照:
SetQuickBestSize()
virtual wxTreeItemId wxTreeCtrl::GetRootItem ( ) const [virtual]

Returns the root item for the tree control.

virtual wxTreeItemId wxTreeCtrl::GetSelection ( ) const [virtual]

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() for the controls which do have this style or, if a single item is wanted, use GetFocusedItem().

virtual size_t wxTreeCtrl::GetSelections ( wxArrayTreeItemIds &  selection) const [virtual]

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.

wxPerl Note: In wxPerl this method takes no parameters and returns a list of Wx::TreeItemId.

wxImageList* wxTreeCtrl::GetStateImageList ( ) const

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

wxTreeItemId wxTreeCtrl::HitTest ( const wxPoint point,
int &  flags 
) const

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:

  • wxTREE_HITTEST_ABOVE: Above the client area.
  • wxTREE_HITTEST_BELOW: Below the client area.
  • wxTREE_HITTEST_NOWHERE: In the client area but below the last item.
  • wxTREE_HITTEST_ONITEMBUTTON: On the button associated with an item.
  • wxTREE_HITTEST_ONITEMICON: On the bitmap associated with an item.
  • wxTREE_HITTEST_ONITEMINDENT: In the indentation associated with an item.
  • wxTREE_HITTEST_ONITEMLABEL: On the label (string) associated with an item.
  • wxTREE_HITTEST_ONITEMRIGHT: In the area to the right of an item.
  • wxTREE_HITTEST_ONITEMSTATEICON: On the state icon for a tree view item that is in a user-defined state.
  • wxTREE_HITTEST_TOLEFT: To the right of the client area.
  • wxTREE_HITTEST_TORIGHT: To the left of the client area.

wxPerl Note: In wxPerl this method only takes the point parameter and returns a 2-element list (item, flags).

wxTreeItemId wxTreeCtrl::InsertItem ( const wxTreeItemId parent,
const wxTreeItemId previous,
const wxString text,
int  image = -1,
int  selImage = -1,
wxTreeItemData data = NULL 
)

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.

wxTreeItemId wxTreeCtrl::InsertItem ( const wxTreeItemId parent,
size_t  before,
const wxString text,
int  image = -1,
int  selImage = -1,
wxTreeItemData data = NULL 
)

Inserts an item before one identified by its position (before).

before must be less than the number of children.

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.

virtual bool wxTreeCtrl::IsBold ( const wxTreeItemId item) const [virtual]

Returns true if the given item is in bold state.

参照:
SetItemBold()
bool wxTreeCtrl::IsEmpty ( ) const

Returns true if the control is empty (i.e.

has no items, even no root one).

virtual bool wxTreeCtrl::IsExpanded ( const wxTreeItemId item) const [virtual]

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

virtual bool wxTreeCtrl::IsSelected ( const wxTreeItemId item) const [virtual]

Returns true if the item is selected.

virtual bool wxTreeCtrl::IsVisible ( const wxTreeItemId item) const [virtual]

Returns true if the item is visible on the screen.

virtual bool wxTreeCtrl::ItemHasChildren ( const wxTreeItemId item) const [virtual]

Returns true if the item has children.

virtual int wxTreeCtrl::OnCompareItems ( const wxTreeItemId item1,
const wxTreeItemId item2 
) [virtual]

Override this function in the derived class to change the sort order of the items in the tree control.

The function should return a negative, zero or positive value if the first item is less than, equal to or greater than the second one.

Please note that you must use wxRTTI macros wxDECLARE_DYNAMIC_CLASS() and wxIMPLEMENT_DYNAMIC_CLASS() if you override this function because otherwise the base class considers that it is not overridden and uses the default comparison, i.e. sorts the items alphabetically, which allows it optimize away the calls to the virtual function completely.

参照:
SortChildren()
wxTreeItemId wxTreeCtrl::PrependItem ( const wxTreeItemId parent,
const wxString text,
int  image = -1,
int  selImage = -1,
wxTreeItemData data = NULL 
)

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.

virtual void wxTreeCtrl::ScrollTo ( const wxTreeItemId item) [virtual]

Scrolls the specified item into view.

virtual void wxTreeCtrl::SelectChildren ( const wxTreeItemId parent) [virtual]

Select all the immediate children of the given parent.

This function can be used with multiselection controls only.

Since:
2.9.1
virtual void wxTreeCtrl::SelectItem ( const wxTreeItemId item,
bool  select = true 
) [virtual]

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_COMMAND_TREE_SEL_CHANGING and wxEVT_COMMAND_TREE_SEL_CHANGED events and that the change could be vetoed by the former event handler.

void wxTreeCtrl::SetButtonsImageList ( wxImageList imageList)

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

The button images assigned with this method will not be deleted by wxTreeCtrl's destructor, you must delete it yourself. Setting or assigning the button image list enables the display of image buttons. Once enabled, the only way to disable the display of button images is to set the button image list to NULL.

注:
This function is only available in the generic version.
参照:
AssignButtonsImageList().
virtual void wxTreeCtrl::SetFocusedItem ( const wxTreeItemId item) [virtual]

Sets the currently focused item.

Parameters:
itemThe item to make the current one. It must be valid.
Since:
2.9.1
virtual void wxTreeCtrl::SetImageList ( wxImageList imageList) [virtual]

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.

参照:
AssignImageList().
virtual void wxTreeCtrl::SetIndent ( unsigned int  indent) [virtual]

Sets the indentation for the tree control.

virtual void wxTreeCtrl::SetItemBackgroundColour ( const wxTreeItemId item,
const wxColour col 
) [virtual]

Sets the colour of the item's background.

virtual void wxTreeCtrl::SetItemBold ( const wxTreeItemId item,
bool  bold = true 
) [virtual]

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

参照:
IsBold()
virtual void wxTreeCtrl::SetItemData ( const wxTreeItemId item,
wxTreeItemData data 
) [virtual]

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.

wxPerl Note: wxPerl provides the following shortcut method:

  • SetPlData(item, data): sets the Perl data associated with the Wx::TreeItemData. It is just the same as tree->GetItemData(item)->SetData(data).
virtual void wxTreeCtrl::SetItemDropHighlight ( const wxTreeItemId item,
bool  highlight = true 
) [virtual]

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).

virtual void wxTreeCtrl::SetItemFont ( const wxTreeItemId item,
const wxFont font 
) [virtual]

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.

参照:
SetItemBold()
virtual void wxTreeCtrl::SetItemHasChildren ( const wxTreeItemId item,
bool  hasChildren = true 
) [virtual]

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.

virtual void wxTreeCtrl::SetItemImage ( const wxTreeItemId item,
int  image,
wxTreeItemIcon  which = wxTreeItemIcon_Normal 
) [virtual]

Sets the specified item's image.

See GetItemImage() for the description of the which parameter.

void wxTreeCtrl::SetItemState ( const wxTreeItemId item,
int  state 
)

Sets the specified item state.

The value of state may be:

  • wxTREE_ITEMSTATE_NONE: to disable the item state (the state image will be not displayed).
  • wxTREE_ITEMSTATE_NEXT: to set the next item state.
  • wxTREE_ITEMSTATE_PREV: to set the previous item state.
virtual void wxTreeCtrl::SetItemText ( const wxTreeItemId item,
const wxString text 
) [virtual]

Sets the item label.

virtual void wxTreeCtrl::SetItemTextColour ( const wxTreeItemId item,
const wxColour col 
) [virtual]

Sets the colour of the item's text.

void wxTreeCtrl::SetQuickBestSize ( bool  quickBestSize)

If true is passed, specifies that the control will use a quick calculation for the best size, looking only at the first and last items.

Otherwise, it will look at all items. The default is false.

参照:
GetQuickBestSize()
virtual void wxTreeCtrl::SetStateImageList ( wxImageList imageList) [virtual]

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.

参照:
AssignStateImageList().
void wxTreeCtrl::SetWindowStyle ( long  styles)

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

The new mode takes effect immediately.

注:
Generic only; MSW ignores changes.

Reimplemented from wxWindow.

virtual void wxTreeCtrl::SortChildren ( const wxTreeItemId item) [virtual]

Sorts the children of the given item using OnCompareItems().

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

参照:
wxTreeItemData, OnCompareItems()
virtual void wxTreeCtrl::Toggle ( const wxTreeItemId item) [virtual]

Toggles the given item between collapsed and expanded states.

void wxTreeCtrl::ToggleItemSelection ( const wxTreeItemId item)

Toggles the given item between selected and unselected states.

For multiselection controls only.

virtual void wxTreeCtrl::Unselect ( ) [virtual]

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

virtual void wxTreeCtrl::UnselectAll ( ) [virtual]

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

void wxTreeCtrl::UnselectItem ( const wxTreeItemId item)

Unselects the given item.

This works in multiselection controls only.

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