281 lines
14 KiB
C++
281 lines
14 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: wx/containr.h
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// Purpose: wxControlContainer class declration: a "mix-in" class which
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// implements the TAB navigation between the controls
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// Author: Vadim Zeitlin
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// Modified by:
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// Created: 06.08.01
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// RCS-ID: $Id: containr.h 61508 2009-07-23 20:30:22Z VZ $
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// Copyright: (c) 2001 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_CONTAINR_H_
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#define _WX_CONTAINR_H_
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#include "wx/defs.h"
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class WXDLLIMPEXP_FWD_CORE wxWindow;
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class WXDLLIMPEXP_FWD_CORE wxWindowBase;
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/*
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Implementation note: wxControlContainer is not a real mix-in but rather
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a class meant to be aggregated with (and not inherited from). Although
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logically it should be a mix-in, doing it like this has no advantage from
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the point of view of the existing code but does have some problems (we'd
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need to play tricks with event handlers which may be difficult to do
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safely). The price we pay for this simplicity is the ugly macros below.
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*/
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// ----------------------------------------------------------------------------
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// wxControlContainerBase: common part used in both native and generic cases
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxControlContainerBase
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{
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public:
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// default ctor, SetContainerWindow() must be called later
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wxControlContainerBase()
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{
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m_winParent = NULL;
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// do accept focus initially, we'll stop doing it if/when any children
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// are added
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m_acceptsFocus = true;
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m_inSetFocus = false;
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m_winLastFocused = NULL;
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}
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virtual ~wxControlContainerBase() {}
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void SetContainerWindow(wxWindow *winParent)
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{
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wxASSERT_MSG( !m_winParent, wxT("shouldn't be called twice") );
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m_winParent = winParent;
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}
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// should be called from SetFocus(), returns false if we did nothing with
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// the focus and the default processing should take place
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bool DoSetFocus();
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// should be called when we decide that we should [stop] accepting focus
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void SetCanFocus(bool acceptsFocus);
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// returns whether we should accept focus ourselves or not
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bool AcceptsFocus() const { return m_acceptsFocus; }
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// returns whether we or one of our children accepts focus: we always do
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// because if we don't have any focusable children it probably means that
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// we're not being used as a container at all (think of wxGrid or generic
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// wxListCtrl) and so should get focus for ourselves
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bool AcceptsFocusRecursively() const { return true; }
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// this is used to determine whether we can accept focus when Tab or
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// another navigation key is pressed -- we alsways can, for the same reason
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// as mentioned above for AcceptsFocusRecursively()
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bool AcceptsFocusFromKeyboard() const { return true; }
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// Call this when the number of children of the window changes.
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// If we have any children, this panel (used just as container for
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// them) shouldn't get focus for itself.
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void UpdateCanFocus() { SetCanFocus(!HasAnyFocusableChildren()); }
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protected:
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// set the focus to the child which had it the last time
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virtual bool SetFocusToChild();
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// return true if we have any children accepting focus
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bool HasAnyFocusableChildren() const;
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// the parent window we manage the children for
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wxWindow *m_winParent;
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// the child which had the focus last time this panel was activated
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wxWindow *m_winLastFocused;
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private:
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// value returned by AcceptsFocus(), should be changed using SetCanFocus()
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// only
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bool m_acceptsFocus;
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// a guard against infinite recursion
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bool m_inSetFocus;
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};
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// common part of WX_DECLARE_CONTROL_CONTAINER in the native and generic cases,
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// it should be used in the wxWindow-derived class declaration
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#define WX_DECLARE_CONTROL_CONTAINER_BASE() \
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public: \
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virtual bool AcceptsFocus() const; \
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virtual bool AcceptsFocusRecursively() const; \
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virtual bool AcceptsFocusFromKeyboard() const; \
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virtual void AddChild(wxWindowBase *child); \
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virtual void RemoveChild(wxWindowBase *child); \
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virtual void SetFocus(); \
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void SetFocusIgnoringChildren(); \
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void AcceptFocus(bool acceptFocus) \
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{ \
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m_container.SetCanFocus(acceptFocus); \
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} \
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\
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protected: \
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wxControlContainer m_container
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// this macro must be used in the derived class ctor
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#define WX_INIT_CONTROL_CONTAINER() \
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m_container.SetContainerWindow(this)
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// common part of WX_DELEGATE_TO_CONTROL_CONTAINER in the native and generic
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// cases, must be used in the wxWindow-derived class implementation
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#define WX_DELEGATE_TO_CONTROL_CONTAINER_BASE(classname, basename) \
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void classname::AddChild(wxWindowBase *child) \
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{ \
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basename::AddChild(child); \
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\
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m_container.UpdateCanFocus(); \
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} \
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\
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bool classname::AcceptsFocusRecursively() const \
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{ \
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return m_container.AcceptsFocusRecursively(); \
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} \
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\
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void classname::SetFocus() \
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{ \
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if ( !m_container.DoSetFocus() ) \
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basename::SetFocus(); \
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} \
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\
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bool classname::AcceptsFocus() const \
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{ \
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return m_container.AcceptsFocus(); \
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} \
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\
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bool classname::AcceptsFocusFromKeyboard() const \
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{ \
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return m_container.AcceptsFocusFromKeyboard(); \
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}
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#ifdef wxHAS_NATIVE_TAB_TRAVERSAL
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// ----------------------------------------------------------------------------
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// wxControlContainer for native TAB navigation
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// ----------------------------------------------------------------------------
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// this must be a real class as we forward-declare it elsewhere
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class WXDLLIMPEXP_CORE wxControlContainer : public wxControlContainerBase
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{
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protected:
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// set the focus to the child which had it the last time
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virtual bool SetFocusToChild();
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};
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#define WX_EVENT_TABLE_CONTROL_CONTAINER(classname)
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#define WX_DECLARE_CONTROL_CONTAINER WX_DECLARE_CONTROL_CONTAINER_BASE
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#define WX_DELEGATE_TO_CONTROL_CONTAINER(classname, basename) \
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WX_DELEGATE_TO_CONTROL_CONTAINER_BASE(classname, basename) \
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\
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void classname::RemoveChild(wxWindowBase *child) \
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{ \
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basename::RemoveChild(child); \
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\
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m_container.UpdateCanFocus(); \
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} \
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\
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void classname::SetFocusIgnoringChildren() \
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{ \
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basename::SetFocus(); \
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}
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#else // !wxHAS_NATIVE_TAB_TRAVERSAL
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class WXDLLIMPEXP_FWD_CORE wxFocusEvent;
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class WXDLLIMPEXP_FWD_CORE wxNavigationKeyEvent;
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// ----------------------------------------------------------------------------
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// wxControlContainer for TAB navigation implemented in wx itself
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_CORE wxControlContainer : public wxControlContainerBase
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{
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public:
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// default ctor, SetContainerWindow() must be called later
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wxControlContainer();
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// the methods to be called from the window event handlers
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void HandleOnNavigationKey(wxNavigationKeyEvent& event);
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void HandleOnFocus(wxFocusEvent& event);
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void HandleOnWindowDestroy(wxWindowBase *child);
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// called from OnChildFocus() handler, i.e. when one of our (grand)
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// children gets the focus
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void SetLastFocus(wxWindow *win);
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protected:
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wxDECLARE_NO_COPY_CLASS(wxControlContainer);
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};
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// ----------------------------------------------------------------------------
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// macros which may be used by the classes wishing to implement TAB navigation
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// among their children
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// ----------------------------------------------------------------------------
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// declare the methods to be forwarded
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#define WX_DECLARE_CONTROL_CONTAINER() \
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WX_DECLARE_CONTROL_CONTAINER_BASE(); \
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\
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public: \
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void OnNavigationKey(wxNavigationKeyEvent& event); \
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void OnFocus(wxFocusEvent& event); \
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virtual void OnChildFocus(wxChildFocusEvent& event)
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// implement the event table entries for wxControlContainer
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#define WX_EVENT_TABLE_CONTROL_CONTAINER(classname) \
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EVT_SET_FOCUS(classname::OnFocus) \
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EVT_CHILD_FOCUS(classname::OnChildFocus) \
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EVT_NAVIGATION_KEY(classname::OnNavigationKey)
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// implement the methods forwarding to the wxControlContainer
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#define WX_DELEGATE_TO_CONTROL_CONTAINER(classname, basename) \
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WX_DELEGATE_TO_CONTROL_CONTAINER_BASE(classname, basename) \
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\
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void classname::RemoveChild(wxWindowBase *child) \
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{ \
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m_container.HandleOnWindowDestroy(child); \
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\
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basename::RemoveChild(child); \
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\
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m_container.UpdateCanFocus(); \
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} \
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\
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void classname::OnNavigationKey( wxNavigationKeyEvent& event ) \
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{ \
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m_container.HandleOnNavigationKey(event); \
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} \
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\
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void classname::SetFocusIgnoringChildren() \
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{ \
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basename::SetFocus(); \
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} \
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\
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void classname::OnChildFocus(wxChildFocusEvent& event) \
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{ \
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m_container.SetLastFocus(event.GetWindow()); \
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event.Skip(); \
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} \
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\
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void classname::OnFocus(wxFocusEvent& event) \
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{ \
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m_container.HandleOnFocus(event); \
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}
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#endif // wxHAS_NATIVE_TAB_TRAVERSAL/!wxHAS_NATIVE_TAB_TRAVERSAL
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// this function is for wxWidgets internal use only
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extern bool wxSetFocusToChild(wxWindow *win, wxWindow **child);
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#endif // _WX_CONTAINR_H_
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