wxTreeEvent Class Reference

#include <wx/treectrl.h>

Inheritance diagram for wxTreeEvent:

Detailed Description

A tree event holds information about events associated with wxTreeCtrl objects.

To process input from a tree control, use these event handler macros to direct input to member functions that take a wxTreeEvent argument.

Events using this class

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

void handlerFuncName(wxTreeEvent& event)

Event macros:

• EVT_TREE_BEGIN_DRAG(id, func):
  Begin dragging with the left mouse button. If you want to enable left-dragging you need to intercept this event and explicitly call wxTreeEvent::Allow(), as it's vetoed by default. Also notice that the control must have an associated image list (see SetImageList()) to drag its items under MSW.
• EVT_TREE_BEGIN_RDRAG(id, func):
  Begin dragging with the right mouse button. If you want to enable right-dragging you need to intercept this event and explicitly call wxTreeEvent::Allow(), as it's vetoed by default.
• EVT_TREE_END_DRAG(id, func):
  End dragging with the left or right mouse button.
• EVT_TREE_BEGIN_LABEL_EDIT(id, func):
  Begin editing a label. This can be prevented by calling Veto().
• EVT_TREE_END_LABEL_EDIT(id, func):
  Finish editing a label. This can be prevented by calling Veto().
• EVT_TREE_DELETE_ITEM(id, func):
  Delete an item.
• EVT_TREE_GET_INFO(id, func):
  Request information from the application.
• EVT_TREE_SET_INFO(id, func):
  Information is being supplied.
• EVT_TREE_ITEM_ACTIVATED(id, func):
  The item has been activated, i.e. chosen by double clicking it with mouse or from keyboard.
• EVT_TREE_ITEM_COLLAPSED(id, func):
  The item has been collapsed.
• EVT_TREE_ITEM_COLLAPSING(id, func):
  The item is being collapsed. This can be prevented by calling Veto().
• EVT_TREE_ITEM_EXPANDED(id, func):
  The item has been expanded.
• EVT_TREE_ITEM_EXPANDING(id, func):
  The item is being expanded. This can be prevented by calling Veto().
• EVT_TREE_ITEM_RIGHT_CLICK(id, func):
  The user has clicked the item with the right mouse button.
• EVT_TREE_ITEM_MIDDLE_CLICK(id, func):
  The user has clicked the item with the middle mouse button.
• EVT_TREE_SEL_CHANGED(id, func):
  Selection has changed.
• EVT_TREE_SEL_CHANGING(id, func):
  Selection is changing. This can be prevented by calling Veto().
• EVT_TREE_KEY_DOWN(id, func):
  A key has been pressed.
• EVT_TREE_ITEM_GETTOOLTIP(id, func):
  The opportunity to set the item tooltip is being given to the application (call SetToolTip()). Windows only.
• EVT_TREE_ITEM_MENU(id, func):
  The context menu for the selected item has been requested, either by a right click or by using the menu key.
• EVT_TREE_STATE_IMAGE_CLICK(id, func):
  The state image has been clicked.

Library:  wxCore

Category:  Events

See Also

wxTreeCtrl

Public Member Functions
	wxTreeEvent (wxEventType commandType, wxTreeCtrl *tree, const wxTreeItemId &item=wxTreeItemId())
	Constructor, used by wxWidgets itself only.
wxTreeItemId	GetItem () const
	Returns the item (valid for all events).
int	GetKeyCode () const
	Returns the key code if the event is a key event.
const wxKeyEvent &	GetKeyEvent () const
	Returns the key event for EVT_TREE_KEY_DOWN events.
const wxString &	GetLabel () const
	Returns the label if the event is a begin or end edit label event.
wxTreeItemId	GetOldItem () const
	Returns the old item index (valid for EVT_TREE_ITEM_CHANGING and EVT_TREE_ITEM_CHANGED events).
wxPoint	GetPoint () const
	Returns the position of the mouse pointer if the event is a drag or menu-context event.
bool	IsEditCancelled () const
	Returns true if the label edit was cancelled.
void	SetToolTip (const wxString &tooltip)
	Set the tooltip for the item (valid for EVT_TREE_ITEM_GETTOOLTIP events).
Public Member Functions inherited from wxNotifyEvent
	wxNotifyEvent (wxEventType eventType=wxEVT_NULL, int id=0)
	Constructor (used internally by wxWidgets only).
void	Allow ()
	This is the opposite of Veto(): it explicitly allows the event to be processed.
bool	IsAllowed () const
	Returns true if the change is allowed (Veto() hasn't been called) or false otherwise (if it was).
void	Veto ()
	Prevents the change announced by this event from happening.
Public Member Functions inherited from wxCommandEvent
	wxCommandEvent (wxEventType commandEventType=wxEVT_NULL, int id=0)
	Constructor.
void *	GetClientData () const
	Returns client data pointer for a listbox or choice selection event (not valid for a deselection).
wxClientData *	GetClientObject () const
	Returns client object pointer for a listbox or choice selection event (not valid for a deselection).
long	GetExtraLong () const
	Returns extra information dependent on the event objects type.
int	GetInt () const
	Returns the integer identifier corresponding to a listbox, choice or radiobox selection (only if the event was a selection, not a deselection), or a boolean value representing the value of a checkbox.
int	GetSelection () const
	Returns item index for a listbox or choice selection event (not valid for a deselection).
wxString	GetString () const
	Returns item string for a listbox or choice selection event.
bool	IsChecked () const
	This method can be used with checkbox and menu events: for the checkboxes, the method returns true for a selection event and false for a deselection one.
bool	IsSelection () const
	For a listbox or similar event, returns true if it is a selection, false if it is a deselection.
void	SetClientData (void *clientData)
	Sets the client data for this event.
void	SetClientObject (wxClientData *clientObject)
	Sets the client object for this event.
void	SetExtraLong (long extraLong)
	Sets the m_extraLong member.
void	SetInt (int intCommand)
	Sets the m_commandInt member.
void	SetString (const wxString &string)
	Sets the m_commandString member.
Public Member Functions inherited from wxEvent
	wxEvent (int id=0, wxEventType eventType=wxEVT_NULL)
	Constructor.
virtual wxEvent *	Clone () const =0
	Returns a copy of the event.
wxObject *	GetEventObject () const
	Returns the object (usually a window) associated with the event, if any.
wxEventType	GetEventType () const
	Returns the identifier of the given event type, such as wxEVT_BUTTON.
virtual wxEventCategory	GetEventCategory () const
	Returns a generic category for this event.
int	GetId () const
	Returns the identifier associated with this event, such as a button command id.
wxObject *	GetEventUserData () const
	Return the user data associated with a dynamically connected event handler.
bool	GetSkipped () const
	Returns true if the event handler should be skipped, false otherwise.
long	GetTimestamp () const
	Gets the timestamp for the event.
bool	IsCommandEvent () const
	Returns true if the event is or is derived from wxCommandEvent else it returns false.
void	ResumePropagation (int propagationLevel)
	Sets the propagation level to the given value (for example returned from an earlier call to wxEvent::StopPropagation).
void	SetEventObject (wxObject *object)
	Sets the originating object.
void	SetEventType (wxEventType type)
	Sets the event type.
void	SetId (int id)
	Sets the identifier associated with this event, such as a button command id.
void	SetTimestamp (long timeStamp=0)
	Sets the timestamp for the event.
bool	ShouldPropagate () const
	Test if this event should be propagated or not, i.e. if the propagation level is currently greater than 0.
void	Skip (bool skip=true)
	This method can be used inside an event handler to control whether further event handlers bound to this event will be called after the current one returns.
int	StopPropagation ()
	Stop the event from propagating to its parent window.
Public Member Functions inherited from wxObject
	wxObject ()
	Default ctor; initializes to NULL the internal reference data.
	wxObject (const wxObject &other)
	Copy ctor.
virtual	~wxObject ()
	Destructor.
virtual wxClassInfo *	GetClassInfo () const
	This virtual function is redefined for every class that requires run-time type information, when using the wxDECLARE_CLASS macro (or similar).
wxObjectRefData *	GetRefData () const
	Returns the wxObject::m_refData pointer, i.e. the data referenced by this object.
bool	IsKindOf (const wxClassInfo *info) const
	Determines whether this class is a subclass of (or the same class as) the given class.
bool	IsSameAs (const wxObject &obj) const
	Returns true if this object has the same data pointer as obj.
void	Ref (const wxObject &clone)
	Makes this object refer to the data in clone.
void	SetRefData (wxObjectRefData *data)
	Sets the wxObject::m_refData pointer.
void	UnRef ()
	Decrements the reference count in the associated data, and if it is zero, deletes the data.
void	UnShare ()
	This is the same of AllocExclusive() but this method is public.
void	operator delete (void *buf)
	The delete operator is defined for debugging versions of the library only, when the identifier WXDEBUG is defined.
void *	operator new (size_t size, const wxString &filename=NULL, int lineNum=0)
	The new operator is defined for debugging versions of the library only, when the identifier WXDEBUG is defined.

Additional Inherited Members
Protected Member Functions inherited from wxObject
void	AllocExclusive ()
	Ensure that this object's data is not shared with any other object.
virtual wxObjectRefData *	CreateRefData () const
	Creates a new instance of the wxObjectRefData-derived class specific to this object and returns it.
virtual wxObjectRefData *	CloneRefData (const wxObjectRefData *data) const
	Creates a new instance of the wxObjectRefData-derived class specific to this object and initializes it copying data.
Protected Attributes inherited from wxEvent
int	m_propagationLevel
	Indicates how many levels the event can propagate.

Constructor & Destructor Documentation

wxTreeEvent::wxTreeEvent	(	wxEventType	commandType,
		wxTreeCtrl *	tree,
		const wxTreeItemId &	item = wxTreeItemId()
	)

Constructor, used by wxWidgets itself only.

Member Function Documentation

wxTreeItemId wxTreeEvent::GetItem

(

)

const

Returns the item (valid for all events).

int wxTreeEvent::GetKeyCode

(

)

const

Returns the key code if the event is a key event.

Use GetKeyEvent() to get the values of the modifier keys for this event (i.e. Shift or Ctrl).

const wxKeyEvent& wxTreeEvent::GetKeyEvent

(

)

const

Returns the key event for EVT_TREE_KEY_DOWN events.

const wxString& wxTreeEvent::GetLabel

(

)

const

Returns the label if the event is a begin or end edit label event.

wxTreeItemId wxTreeEvent::GetOldItem

(

)

const

Returns the old item index (valid for EVT_TREE_ITEM_CHANGING and EVT_TREE_ITEM_CHANGED events).

wxPoint wxTreeEvent::GetPoint

(

)

const

Returns the position of the mouse pointer if the event is a drag or menu-context event.

In both cases the position is in client coordinates - i.e. relative to the wxTreeCtrl window (so that you can pass it directly to e.g. wxWindow::PopupMenu()).

bool wxTreeEvent::IsEditCancelled

(

)

const

Returns true if the label edit was cancelled.

This should be called from within an EVT_TREE_END_LABEL_EDIT handler.

void wxTreeEvent::SetToolTip

(

const wxString &

tooltip

)

Set the tooltip for the item (valid for EVT_TREE_ITEM_GETTOOLTIP events).

Windows only.