wxAuiManager Class Reference

#include <wx/aui/framemanager.h>

Inheritance diagram for wxAuiManager:

Detailed Description

wxAuiManager is the central class of the wxAUI class framework.

wxAuiManager manages the panes associated with it for a particular wxFrame, using a pane's wxAuiPaneInfo information to determine each pane's docking and floating behaviour.

wxAuiManager uses wxWidgets' sizer mechanism to plan the layout of each frame. It uses a replaceable dock art class to do all drawing, so all drawing is localized in one area, and may be customized depending on an application's specific needs.

wxAuiManager works as follows: the programmer adds panes to the class, or makes changes to existing pane properties (dock position, floating state, show state, etc.). To apply these changes, wxAuiManager's Update() function is called. This batch processing can be used to avoid flicker, by modifying more than one pane at a time, and then "committing" all of the changes at once by calling Update().

Panes can be added quite easily:

wxTextCtrl* text1 = new wxTextCtrl(this, -1);
wxTextCtrl* text2 = new wxTextCtrl(this, -1);
m_mgr.AddPane(text1, wxLEFT, "Pane Caption");
m_mgr.AddPane(text2, wxBOTTOM, "Pane Caption");
m_mgr.Update();

Later on, the positions can be modified easily. The following will float an existing pane in a tool window:

m_mgr.GetPane(text1).Float();

Layers, Rows and Directions, Positions

Inside wxAUI, the docking layout is figured out by checking several pane parameters. Four of these are important for determining where a pane will end up:

• Direction: Each docked pane has a direction, Top, Bottom, Left, Right, or Center. This is fairly self-explanatory. The pane will be placed in the location specified by this variable.
• Position: More than one pane can be placed inside of a dock. Imagine two panes being docked on the left side of a window. One pane can be placed over another. In proportionally managed docks, the pane position indicates its sequential position, starting with zero. So, in our scenario with two panes docked on the left side, the top pane in the dock would have position 0, and the second one would occupy position 1.
• Row: A row can allow for two docks to be placed next to each other. One of the most common places for this to happen is in the toolbar. Multiple toolbar rows are allowed, the first row being row 0, and the second row 1. Rows can also be used on vertically docked panes.
• Layer: A layer is akin to an onion. Layer 0 is the very center of the managed pane. Thus, if a pane is in layer 0, it will be closest to the center window (also sometimes known as the "content window"). Increasing layers "swallow up" all layers of a lower value. This can look very similar to multiple rows, but is different because all panes in a lower level yield to panes in higher levels. The best way to understand layers is by running the wxAUI sample.

Styles

This class supports the following styles:

• wxAUI_MGR_ALLOW_FLOATING:
  Allow a pane to be undocked to take the form of a wxMiniFrame.
• wxAUI_MGR_ALLOW_ACTIVE_PANE:
  Change the color of the title bar of the pane when it is activated.
• wxAUI_MGR_TRANSPARENT_DRAG:
  Make the pane transparent during its movement.
• wxAUI_MGR_TRANSPARENT_HINT:
  The possible location for docking is indicated by a translucent area.
• wxAUI_MGR_VENETIAN_BLINDS_HINT:
  The possible location for docking is indicated by gradually appearing partially transparent hint.
• wxAUI_MGR_RECTANGLE_HINT:
  The possible location for docking is indicated by a rectangular outline.
• wxAUI_MGR_HINT_FADE:
  The translucent area where the pane could be docked appears gradually.
• wxAUI_MGR_NO_VENETIAN_BLINDS_FADE:
  Used in complement of wxAUI_MGR_VENETIAN_BLINDS_HINT to show the docking hint immediately.
• wxAUI_MGR_LIVE_RESIZE:
  When a docked pane is resized, its content is refreshed in live (instead of moving the border alone and refreshing the content at the end).
• wxAUI_MGR_DEFAULT:
  Default behavior, combines: wxAUI_MGR_ALLOW_FLOATING | wxAUI_MGR_TRANSPARENT_HINT | wxAUI_MGR_HINT_FADE | wxAUI_MGR_NO_VENETIAN_BLINDS_FADE.

Events emitted by this class

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

void handlerFuncName(wxAuiManagerEvent& event)

Event macros for events emitted by this class:

• EVT_AUI_PANE_BUTTON(func):
  Triggered when any button is pressed for any docked panes.
• EVT_AUI_PANE_CLOSE(func):
  Triggered when a docked or floating pane is closed.
• EVT_AUI_PANE_MAXIMIZE(func):
  Triggered when a pane is maximized.
• EVT_AUI_PANE_RESTORE(func):
  Triggered when a pane is restored.
• EVT_AUI_PANE_ACTIVATED(func):
  Triggered when a pane is made 'active'. This event is new since wxWidgets 2.9.4.
• EVT_AUI_RENDER(func):
  This event can be caught to override the default renderer in order to custom draw your wxAuiManager window (not recommended).

Library:  wxAui

Category:  Window Docking (wxAUI)

See also

wxAUI Overview, wxAuiNotebook, wxAuiDockArt, wxAuiPaneInfo

Public Member Functions
	wxAuiManager (wxWindow *managed_wnd=NULL, unsigned int flags=wxAUI_MGR_DEFAULT)
	Constructor. More...
virtual	~wxAuiManager ()
	Dtor. More...
bool	DetachPane (wxWindow *window)
	Tells the wxAuiManager to stop managing the pane specified by window. More...
wxAuiPaneInfoArray &	GetAllPanes ()
	Returns an array of all panes managed by the frame manager. More...
wxAuiDockArt *	GetArtProvider () const
	Returns the current art provider being used. More...
void	GetDockSizeConstraint (double *widthpct, double *heightpct) const
	Returns the current dock constraint values. More...
unsigned int	GetFlags () const
	Returns the current wxAuiManagerOption's flags. More...
wxWindow *	GetManagedWindow () const
	Returns the frame currently being managed by wxAuiManager. More...
virtual void	HideHint ()
	HideHint() hides any docking hint that may be visible. More...
bool	InsertPane (wxWindow *window, const wxAuiPaneInfo &insert_location, int insert_level=wxAUI_INSERT_PANE)
	This method is used to insert either a previously unmanaged pane window into the frame manager, or to insert a currently managed pane somewhere else. More...
void	LoadPaneInfo (wxString pane_part, wxAuiPaneInfo &pane)
	LoadPaneInfo() is similar to LoadPerspective, with the exception that it only loads information about a single pane. More...
bool	LoadPerspective (const wxString &perspective, bool update=true)
	Loads a saved perspective. More...
wxString	SavePaneInfo (wxAuiPaneInfo &pane)
	SavePaneInfo() is similar to SavePerspective, with the exception that it only saves information about a single pane. More...
wxString	SavePerspective ()
	Saves the entire user interface layout into an encoded wxString, which can then be stored by the application (probably using wxConfig). More...
void	SetArtProvider (wxAuiDockArt *art_provider)
	Instructs wxAuiManager to use art provider specified by parameter art_provider for all drawing calls. More...
void	SetDockSizeConstraint (double widthpct, double heightpct)
	When a user creates a new dock by dragging a window into a docked position, often times the large size of the window will create a dock that is unwieldly large. More...
void	SetFlags (unsigned int flags)
	This method is used to specify wxAuiManagerOption's flags. More...
void	SetManagedWindow (wxWindow *managed_wnd)
	Called to specify the frame or window which is to be managed by wxAuiManager. More...
virtual void	ShowHint (const wxRect &rect)
	This function is used by controls to explicitly show a hint window at the specified rectangle. More...
void	UnInit ()
	Uninitializes the framework and should be called before a managed frame or window is destroyed. More...
void	Update ()
	This method is called after any number of changes are made to any of the managed panes. More...
bool	AddPane (wxWindow *window, const wxAuiPaneInfo &pane_info)
	AddPane() tells the frame manager to start managing a child window. More...
bool	AddPane (wxWindow *window, int direction=wxLEFT, const wxString &caption=wxEmptyString)
	AddPane() tells the frame manager to start managing a child window. More...
bool	AddPane (wxWindow *window, const wxAuiPaneInfo &pane_info, const wxPoint &drop_pos)
	AddPane() tells the frame manager to start managing a child window. More...
wxAuiPaneInfo &	GetPane (wxWindow *window)
	GetPane() is used to lookup a wxAuiPaneInfo object either by window pointer or by pane name, which acts as a unique id for a window pane. More...
wxAuiPaneInfo &	GetPane (const wxString &name)
	GetPane() is used to lookup a wxAuiPaneInfo object either by window pointer or by pane name, which acts as a unique id for a window pane. More...
Public Member Functions inherited from wxEvtHandler
	wxEvtHandler ()
	Constructor. More...
virtual	~wxEvtHandler ()
	Destructor. More...
virtual void	QueueEvent (wxEvent *event)
	Queue event for a later processing. More...
virtual void	AddPendingEvent (const wxEvent &event)
	Post an event to be processed later. More...
template<typename T , typename T1 , ... >
void	CallAfter (void(T::*method)(T1,...), T1 x1,...)
	Asynchronously call the given method. More...
template<typename T >
void	CallAfter (const T &functor)
	Asynchronously call the given functor. More...
virtual bool	ProcessEvent (wxEvent &event)
	Processes an event, searching event tables and calling zero or more suitable event handler function(s). More...
bool	ProcessEventLocally (wxEvent &event)
	Try to process the event in this handler and all those chained to it. More...
bool	SafelyProcessEvent (wxEvent &event)
	Processes an event by calling ProcessEvent() and handles any exceptions that occur in the process. More...
void	ProcessPendingEvents ()
	Processes the pending events previously queued using QueueEvent() or AddPendingEvent(); you must call this function only if you are sure there are pending events for this handler, otherwise a wxCHECK will fail. More...
void	DeletePendingEvents ()
	Deletes all events queued on this event handler using QueueEvent() or AddPendingEvent(). More...
virtual bool	SearchEventTable (wxEventTable &table, wxEvent &event)
	Searches the event table, executing an event handler function if an appropriate one is found. More...
void	Connect (int id, int lastId, wxEventType eventType, wxObjectEventFunction function, wxObject *userData=NULL, wxEvtHandler *eventSink=NULL)
	Connects the given function dynamically with the event handler, id and event type. More...
void	Connect (int id, wxEventType eventType, wxObjectEventFunction function, wxObject *userData=NULL, wxEvtHandler *eventSink=NULL)
	See the Connect(int, int, wxEventType, wxObjectEventFunction, wxObject*, wxEvtHandler*) overload for more info. More...
void	Connect (wxEventType eventType, wxObjectEventFunction function, wxObject *userData=NULL, wxEvtHandler *eventSink=NULL)
	See the Connect(int, int, wxEventType, wxObjectEventFunction, wxObject*, wxEvtHandler*) overload for more info. More...
bool	Disconnect (wxEventType eventType, wxObjectEventFunction function, wxObject *userData=NULL, wxEvtHandler *eventSink=NULL)
	Disconnects the given function dynamically from the event handler, using the specified parameters as search criteria and returning true if a matching function has been found and removed. More...
bool	Disconnect (int id=wxID_ANY, wxEventType eventType=wxEVT_NULL, wxObjectEventFunction function=NULL, wxObject *userData=NULL, wxEvtHandler *eventSink=NULL)
	See the Disconnect(wxEventType, wxObjectEventFunction, wxObject*, wxEvtHandler*) overload for more info. More...
bool	Disconnect (int id, int lastId, wxEventType eventType, wxObjectEventFunction function=NULL, wxObject *userData=NULL, wxEvtHandler *eventSink=NULL)
	See the Disconnect(wxEventType, wxObjectEventFunction, wxObject*, wxEvtHandler*) overload for more info. More...
template<typename EventTag , typename Functor >
void	Bind (const EventTag &eventType, Functor functor, int id=wxID_ANY, int lastId=wxID_ANY, wxObject *userData=NULL)
	Binds the given function, functor or method dynamically with the event. More...
template<typename EventTag , typename Class , typename EventArg , typename EventHandler >
void	Bind (const EventTag &eventType, void(Class::*method)(EventArg &), EventHandler *handler, int id=wxID_ANY, int lastId=wxID_ANY, wxObject *userData=NULL)
	See the Bind<>(const EventTag&, Functor, int, int, wxObject*) overload for more info. More...
template<typename EventTag , typename Functor >
bool	Unbind (const EventTag &eventType, Functor functor, int id=wxID_ANY, int lastId=wxID_ANY, wxObject *userData=NULL)
	Unbinds the given function, functor or method dynamically from the event handler, using the specified parameters as search criteria and returning true if a matching function has been found and removed. More...
template<typename EventTag , typename Class , typename EventArg , typename EventHandler >
bool	Unbind (const EventTag &eventType, void(Class::*method)(EventArg &), EventHandler *handler, int id=wxID_ANY, int lastId=wxID_ANY, wxObject *userData=NULL)
	See the Unbind<>(const EventTag&, Functor, int, int, wxObject*) overload for more info. More...
void *	GetClientData () const
	Returns user-supplied client data. More...
wxClientData *	GetClientObject () const
	Returns a pointer to the user-supplied client data object. More...
void	SetClientData (void *data)
	Sets user-supplied client data. More...
void	SetClientObject (wxClientData *data)
	Set the client data object. More...
bool	GetEvtHandlerEnabled () const
	Returns true if the event handler is enabled, false otherwise. More...
wxEvtHandler *	GetNextHandler () const
	Returns the pointer to the next handler in the chain. More...
wxEvtHandler *	GetPreviousHandler () const
	Returns the pointer to the previous handler in the chain. More...
void	SetEvtHandlerEnabled (bool enabled)
	Enables or disables the event handler. More...
virtual void	SetNextHandler (wxEvtHandler *handler)
	Sets the pointer to the next handler. More...
virtual void	SetPreviousHandler (wxEvtHandler *handler)
	Sets the pointer to the previous handler. More...
void	Unlink ()
	Unlinks this event handler from the chain it's part of (if any); then links the "previous" event handler to the "next" one (so that the chain won't be interrupted). More...
bool	IsUnlinked () const
	Returns true if the next and the previous handler pointers of this event handler instance are NULL. More...
Public Member Functions inherited from wxObject
	wxObject ()
	Default ctor; initializes to NULL the internal reference data. More...
	wxObject (const wxObject &other)
	Copy ctor. More...
virtual	~wxObject ()
	Destructor. More...
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). More...
wxObjectRefData *	GetRefData () const
	Returns the wxObject::m_refData pointer, i.e. the data referenced by this object. More...
bool	IsKindOf (const wxClassInfo *info) const
	Determines whether this class is a subclass of (or the same class as) the given class. More...
bool	IsSameAs (const wxObject &obj) const
	Returns true if this object has the same data pointer as obj. More...
void	Ref (const wxObject &clone)
	Makes this object refer to the data in clone. More...
void	SetRefData (wxObjectRefData *data)
	Sets the wxObject::m_refData pointer. More...
void	UnRef ()
	Decrements the reference count in the associated data, and if it is zero, deletes the data. More...
void	UnShare ()
	This is the same of AllocExclusive() but this method is public. More...
void	operator delete (void *buf)
	The delete operator is defined for debugging versions of the library only, when the identifier WXDEBUG is defined. More...
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. More...

Static Public Member Functions
static wxAuiManager *	GetManager (wxWindow *window)
	Calling this method will return the wxAuiManager for a given window. More...
Static Public Member Functions inherited from wxEvtHandler
static void	AddFilter (wxEventFilter *filter)
	Add an event filter whose FilterEvent() method will be called for each and every event processed by wxWidgets. More...
static void	RemoveFilter (wxEventFilter *filter)
	Remove a filter previously installed with AddFilter(). More...

Protected Member Functions
virtual bool	ProcessDockResult (wxAuiPaneInfo &target, const wxAuiPaneInfo &new_pos)
	ProcessDockResult() is a protected member of the wxAUI layout manager. More...
Protected Member Functions inherited from wxEvtHandler
virtual bool	TryBefore (wxEvent &event)
	Method called by ProcessEvent() before examining this object event tables. More...
virtual bool	TryAfter (wxEvent &event)
	Method called by ProcessEvent() as last resort. More...
Protected Member Functions inherited from wxObject
void	AllocExclusive ()
	Ensure that this object's data is not shared with any other object. More...
virtual wxObjectRefData *	CreateRefData () const
	Creates a new instance of the wxObjectRefData-derived class specific to this object and returns it. More...
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. More...

Additional Inherited Members
Protected Attributes inherited from wxObject
wxObjectRefData *	m_refData
	Pointer to an object which is the object's reference-counted data. More...

Constructor & Destructor Documentation

wxAuiManager::wxAuiManager	(	wxWindow *	managed_wnd = NULL,
		unsigned int	flags = wxAUI_MGR_DEFAULT
	)

Constructor.

Parameters

managed_wnd	Specifies the wxFrame which should be managed.
flags	Specifies the frame management behaviour and visual effects with the wxAuiManagerOption's style flags.

virtual wxAuiManager::~wxAuiManager ( )

virtual

Dtor.

Member Function Documentation

bool wxAuiManager::AddPane	(	wxWindow *	window,
		const wxAuiPaneInfo &	pane_info
	)

AddPane() tells the frame manager to start managing a child window.

There are several versions of this function. The first version allows the full spectrum of pane parameter possibilities. The second version is used for simpler user interfaces which do not require as much configuration. The last version allows a drop position to be specified, which will determine where the pane will be added.

bool wxAuiManager::AddPane	(	wxWindow *	window,
		int	direction = wxLEFT,
		const wxString &	caption = wxEmptyString
	)

AddPane() tells the frame manager to start managing a child window.

There are several versions of this function. The first version allows the full spectrum of pane parameter possibilities. The second version is used for simpler user interfaces which do not require as much configuration. The last version allows a drop position to be specified, which will determine where the pane will be added.

bool wxAuiManager::AddPane	(	wxWindow *	window,
		const wxAuiPaneInfo &	pane_info,
		const wxPoint &	drop_pos
	)

AddPane() tells the frame manager to start managing a child window.

There are several versions of this function. The first version allows the full spectrum of pane parameter possibilities. The second version is used for simpler user interfaces which do not require as much configuration. The last version allows a drop position to be specified, which will determine where the pane will be added.

bool wxAuiManager::DetachPane

(

wxWindow *

window

)

Tells the wxAuiManager to stop managing the pane specified by window.

The window, if in a floated frame, is reparented to the frame managed by wxAuiManager.

wxAuiPaneInfoArray& wxAuiManager::GetAllPanes

(

)

Returns an array of all panes managed by the frame manager.

wxAuiDockArt* wxAuiManager::GetArtProvider

(

)

const

Returns the current art provider being used.

See also

wxAuiDockArt.

void wxAuiManager::GetDockSizeConstraint	(	double *	widthpct,
		double *	heightpct
	)		const

Returns the current dock constraint values.

See SetDockSizeConstraint() for more information.

unsigned int wxAuiManager::GetFlags

(

)

const

Returns the current wxAuiManagerOption's flags.

wxWindow* wxAuiManager::GetManagedWindow

(

)

const

Returns the frame currently being managed by wxAuiManager.

static wxAuiManager* wxAuiManager::GetManager ( wxWindow *  window )

static

Calling this method will return the wxAuiManager for a given window.

The window parameter should specify any child window or sub-child window of the frame or window managed by wxAuiManager.

The window parameter need not be managed by the manager itself, nor does it even need to be a child or sub-child of a managed window. It must however be inside the window hierarchy underneath the managed window.

wxAuiPaneInfo& wxAuiManager::GetPane

(

wxWindow *

window

)

GetPane() is used to lookup a wxAuiPaneInfo object either by window pointer or by pane name, which acts as a unique id for a window pane.

The returned wxAuiPaneInfo object may then be modified to change a pane's look, state or position. After one or more modifications to wxAuiPaneInfo, wxAuiManager::Update() should be called to commit the changes to the user interface. If the lookup failed (meaning the pane could not be found in the manager), a call to the returned wxAuiPaneInfo's IsOk() method will return false.

wxAuiPaneInfo& wxAuiManager::GetPane

(

const wxString &

name

)

GetPane() is used to lookup a wxAuiPaneInfo object either by window pointer or by pane name, which acts as a unique id for a window pane.

The returned wxAuiPaneInfo object may then be modified to change a pane's look, state or position. After one or more modifications to wxAuiPaneInfo, wxAuiManager::Update() should be called to commit the changes to the user interface. If the lookup failed (meaning the pane could not be found in the manager), a call to the returned wxAuiPaneInfo's IsOk() method will return false.

virtual void wxAuiManager::HideHint ( )

virtual

HideHint() hides any docking hint that may be visible.

bool wxAuiManager::InsertPane	(	wxWindow *	window,
		const wxAuiPaneInfo &	insert_location,
		int	insert_level = wxAUI_INSERT_PANE
	)

This method is used to insert either a previously unmanaged pane window into the frame manager, or to insert a currently managed pane somewhere else.

InsertPane() will push all panes, rows, or docks aside and insert the window into the position specified by insert_location.

Because insert_location can specify either a pane, dock row, or dock layer, the insert_level parameter is used to disambiguate this. The parameter insert_level can take a value of wxAUI_INSERT_PANE, wxAUI_INSERT_ROW or wxAUI_INSERT_DOCK.

void wxAuiManager::LoadPaneInfo	(	wxString	pane_part,
		wxAuiPaneInfo &	pane
	)

LoadPaneInfo() is similar to LoadPerspective, with the exception that it only loads information about a single pane.

It is used in combination with SavePaneInfo().

bool wxAuiManager::LoadPerspective	(	const wxString &	perspective,
		bool	update = true
	)

Loads a saved perspective.

If update is true, wxAuiManager::Update() is automatically invoked, thus realizing the saved perspective on screen.

virtual bool wxAuiManager::ProcessDockResult ( wxAuiPaneInfo &  target, const wxAuiPaneInfo &  new_pos  )

protectedvirtual

ProcessDockResult() is a protected member of the wxAUI layout manager.

It can be overridden by derived classes to provide custom docking calculations.

wxString wxAuiManager::SavePaneInfo

(

wxAuiPaneInfo &

pane

)

SavePaneInfo() is similar to SavePerspective, with the exception that it only saves information about a single pane.

It is used in combination with LoadPaneInfo().

wxString wxAuiManager::SavePerspective

(

)

Saves the entire user interface layout into an encoded wxString, which can then be stored by the application (probably using wxConfig).

When a perspective is restored using LoadPerspective(), the entire user interface will return to the state it was when the perspective was saved.

void wxAuiManager::SetArtProvider

(

wxAuiDockArt *

art_provider

)

Instructs wxAuiManager to use art provider specified by parameter art_provider for all drawing calls.

This allows plugable look-and-feel features. The previous art provider object, if any, will be deleted by wxAuiManager.

See also

wxAuiDockArt.

void wxAuiManager::SetDockSizeConstraint	(	double	widthpct,
		double	heightpct
	)

When a user creates a new dock by dragging a window into a docked position, often times the large size of the window will create a dock that is unwieldly large.

wxAuiManager by default limits the size of any new dock to 1/3 of the window size. For horizontal docks, this would be 1/3 of the window height. For vertical docks, 1/3 of the width.

Calling this function will adjust this constraint value. The numbers must be between 0.0 and 1.0. For instance, calling SetDockSizeContraint with 0.5, 0.5 will cause new docks to be limited to half of the size of the entire managed window.

void wxAuiManager::SetFlags

(

unsigned int

flags

)

This method is used to specify wxAuiManagerOption's flags.

flags specifies options which allow the frame management behaviour to be modified.

void wxAuiManager::SetManagedWindow

(

wxWindow *

managed_wnd

)

Called to specify the frame or window which is to be managed by wxAuiManager.

Frame management is not restricted to just frames. Child windows or custom controls are also allowed.

virtual void wxAuiManager::ShowHint ( const wxRect &  rect )

virtual

This function is used by controls to explicitly show a hint window at the specified rectangle.

It is rarely called, and is mostly used by controls implementing custom pane drag/drop behaviour. The specified rectangle should be in screen coordinates.

void wxAuiManager::UnInit

(

)

Uninitializes the framework and should be called before a managed frame or window is destroyed.

UnInit() is usually called in the managed wxFrame's destructor. It is necessary to call this function before the managed frame or window is destroyed, otherwise the manager cannot remove its custom event handlers from a window.

void wxAuiManager::Update

(

)

This method is called after any number of changes are made to any of the managed panes.

Update() must be invoked after AddPane() or InsertPane() are called in order to "realize" or "commit" the changes. In addition, any number of changes may be made to wxAuiPaneInfo structures (retrieved with wxAuiManager::GetPane), but to realize the changes, Update() must be called. This construction allows pane flicker to be avoided by updating the whole layout at one time.