X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/53a2db124c633f80bdb16336084262037d879a2c..438959cca892a7651634cc3a7aad4819ac49b23c:/include/wx/containr.h?ds=inline diff --git a/include/wx/containr.h b/include/wx/containr.h index 7dcf2a048e..24e404a7f8 100644 --- a/include/wx/containr.h +++ b/include/wx/containr.h @@ -1,12 +1,11 @@ /////////////////////////////////////////////////////////////////////////////// // Name: wx/containr.h -// Purpose: wxControlContainer class declration: a "mix-in" class which -// implements the TAB navigation between the controls +// Purpose: wxControlContainer and wxNavigationEnabled declarations // Author: Vadim Zeitlin // Modified by: // Created: 06.08.01 // RCS-ID: $Id$ -// Copyright: (c) 2001 Vadim Zeitlin +// Copyright: (c) 2001, 2011 Vadim Zeitlin // Licence: wxWindows licence /////////////////////////////////////////////////////////////////////////////// @@ -15,16 +14,20 @@ #include "wx/defs.h" +#ifndef wxHAS_NATIVE_TAB_TRAVERSAL + // We need wxEVT_XXX declarations in this case. + #include "wx/event.h" +#endif + class WXDLLIMPEXP_FWD_CORE wxWindow; class WXDLLIMPEXP_FWD_CORE wxWindowBase; /* - Implementation note: wxControlContainer is not a real mix-in but rather - a class meant to be aggregated with (and not inherited from). Although - logically it should be a mix-in, doing it like this has no advantage from - the point of view of the existing code but does have some problems (we'd - need to play tricks with event handlers which may be difficult to do - safely). The price we pay for this simplicity is the ugly macros below. + This header declares wxControlContainer class however it's not a real + container of controls but rather just a helper used to implement TAB + navigation among the window children. You should rarely need to use it + directly, derive from the documented public wxNavigationEnabled<> class to + implement TAB navigation in a custom composite window. */ // ---------------------------------------------------------------------------- @@ -39,9 +42,12 @@ public: { m_winParent = NULL; - // do accept focus initially, we'll stop doing it if/when any children - // are added - m_acceptsFocus = true; + // By default, we accept focus ourselves. + m_acceptsFocusSelf = true; + + // But we don't have any children accepting it yet. + m_acceptsFocusChildren = false; + m_inSetFocus = false; m_winLastFocused = NULL; } @@ -49,36 +55,33 @@ public: void SetContainerWindow(wxWindow *winParent) { - wxASSERT_MSG( !m_winParent, _T("shouldn't be called twice") ); + wxASSERT_MSG( !m_winParent, wxT("shouldn't be called twice") ); m_winParent = winParent; } + // This can be called by the window to indicate that it never wants to have + // the focus for itself. + void DisableSelfFocus() { m_acceptsFocusSelf = false; } + // should be called from SetFocus(), returns false if we did nothing with // the focus and the default processing should take place bool DoSetFocus(); - // should be called when we decide that we should [stop] accepting focus - void SetCanFocus(bool acceptsFocus); - // returns whether we should accept focus ourselves or not - bool AcceptsFocus() const { return m_acceptsFocus; } + bool AcceptsFocus() const { return m_acceptsFocusSelf; } - // returns whether we or one of our children accepts focus: we always do - // because if we don't have any focusable children it probably means that - // we're not being used as a container at all (think of wxGrid or generic - // wxListCtrl) and so should get focus for ourselves - bool AcceptsFocusRecursively() const { return true; } + // Returns whether we or one of our children accepts focus. + bool AcceptsFocusRecursively() const + { return m_acceptsFocusSelf || m_acceptsFocusChildren; } - // this is used to determine whether we can accept focus when Tab or - // another navigation key is pressed -- we alsways can, for the same reason - // as mentioned above for AcceptsFocusRecursively() - bool AcceptsFocusFromKeyboard() const { return true; } + // We accept focus from keyboard if we accept it at all. + bool AcceptsFocusFromKeyboard() const { return AcceptsFocusRecursively(); } // Call this when the number of children of the window changes. - // If we have any children, this panel (used just as container for - // them) shouldn't get focus for itself. - void UpdateCanFocus() { SetCanFocus(!HasAnyFocusableChildren()); } + // + // Returns true if we have any focusable children, false otherwise. + bool UpdateCanFocusChildren(); protected: // set the focus to the child which had it the last time @@ -94,14 +97,179 @@ protected: wxWindow *m_winLastFocused; private: - // value returned by AcceptsFocus(), should be changed using SetCanFocus() - // only - bool m_acceptsFocus; + // Indicates whether the associated window can ever have focus itself. + // + // Usually this is the case, e.g. a wxPanel can be used either as a + // container for its children or just as a normal window which can be + // focused. But sometimes, e.g. for wxStaticBox, we can never have focus + // ourselves and can only get it if we have any focusable children. + bool m_acceptsFocusSelf; + + // Cached value remembering whether we have any children accepting focus. + bool m_acceptsFocusChildren; // a guard against infinite recursion bool m_inSetFocus; }; +#ifdef wxHAS_NATIVE_TAB_TRAVERSAL + +// ---------------------------------------------------------------------------- +// wxControlContainer for native TAB navigation +// ---------------------------------------------------------------------------- + +// this must be a real class as we forward-declare it elsewhere +class WXDLLIMPEXP_CORE wxControlContainer : public wxControlContainerBase +{ +protected: + // set the focus to the child which had it the last time + virtual bool SetFocusToChild(); +}; + +#else // !wxHAS_NATIVE_TAB_TRAVERSAL + +// ---------------------------------------------------------------------------- +// wxControlContainer for TAB navigation implemented in wx itself +// ---------------------------------------------------------------------------- + +class WXDLLIMPEXP_CORE wxControlContainer : public wxControlContainerBase +{ +public: + // default ctor, SetContainerWindow() must be called later + wxControlContainer(); + + // the methods to be called from the window event handlers + void HandleOnNavigationKey(wxNavigationKeyEvent& event); + void HandleOnFocus(wxFocusEvent& event); + void HandleOnWindowDestroy(wxWindowBase *child); + + // called from OnChildFocus() handler, i.e. when one of our (grand) + // children gets the focus + void SetLastFocus(wxWindow *win); + +protected: + + wxDECLARE_NO_COPY_CLASS(wxControlContainer); +}; + +#endif // wxHAS_NATIVE_TAB_TRAVERSAL/!wxHAS_NATIVE_TAB_TRAVERSAL + +// this function is for wxWidgets internal use only +extern WXDLLIMPEXP_CORE bool wxSetFocusToChild(wxWindow *win, wxWindow **child); + +// ---------------------------------------------------------------------------- +// wxNavigationEnabled: Derive from this class to support keyboard navigation +// among window children in a wxWindow-derived class. The details of this class +// don't matter, you just need to derive from it to make navigation work. +// ---------------------------------------------------------------------------- + +// The template parameter W must be a wxWindow-derived class. +template +class wxNavigationEnabled : public W +{ +public: + typedef W BaseWindowClass; + + wxNavigationEnabled() + { + m_container.SetContainerWindow(this); + +#ifndef wxHAS_NATIVE_TAB_TRAVERSAL + BaseWindowClass::Connect(wxEVT_NAVIGATION_KEY, + wxNavigationKeyEventHandler(wxNavigationEnabled::OnNavigationKey)); + + BaseWindowClass::Connect(wxEVT_SET_FOCUS, + wxFocusEventHandler(wxNavigationEnabled::OnFocus)); + + BaseWindowClass::Connect(wxEVT_CHILD_FOCUS, + wxChildFocusEventHandler(wxNavigationEnabled::OnChildFocus)); +#endif // !wxHAS_NATIVE_TAB_TRAVERSAL + } + + WXDLLIMPEXP_INLINE_CORE virtual bool AcceptsFocus() const + { + return m_container.AcceptsFocus(); + } + + WXDLLIMPEXP_INLINE_CORE virtual bool AcceptsFocusRecursively() const + { + return m_container.AcceptsFocusRecursively(); + } + + WXDLLIMPEXP_INLINE_CORE virtual bool AcceptsFocusFromKeyboard() const + { + return m_container.AcceptsFocusFromKeyboard(); + } + + WXDLLIMPEXP_INLINE_CORE virtual void AddChild(wxWindowBase *child) + { + BaseWindowClass::AddChild(child); + + if ( m_container.UpdateCanFocusChildren() ) + { + // Under MSW we must have wxTAB_TRAVERSAL style for TAB navigation + // to work. + if ( !BaseWindowClass::HasFlag(wxTAB_TRAVERSAL) ) + BaseWindowClass::ToggleWindowStyle(wxTAB_TRAVERSAL); + } + } + + WXDLLIMPEXP_INLINE_CORE virtual void RemoveChild(wxWindowBase *child) + { +#ifndef wxHAS_NATIVE_TAB_TRAVERSAL + m_container.HandleOnWindowDestroy(child); +#endif // !wxHAS_NATIVE_TAB_TRAVERSAL + + BaseWindowClass::RemoveChild(child); + + // We could reset wxTAB_TRAVERSAL here but it doesn't seem to do any + // harm to keep it. + m_container.UpdateCanFocusChildren(); + } + + WXDLLIMPEXP_INLINE_CORE virtual void SetFocus() + { + if ( !m_container.DoSetFocus() ) + BaseWindowClass::SetFocus(); + } + + void SetFocusIgnoringChildren() + { + BaseWindowClass::SetFocus(); + } + +protected: +#ifndef wxHAS_NATIVE_TAB_TRAVERSAL + void OnNavigationKey(wxNavigationKeyEvent& event) + { + m_container.HandleOnNavigationKey(event); + } + + void OnFocus(wxFocusEvent& event) + { + m_container.HandleOnFocus(event); + } + + void OnChildFocus(wxChildFocusEvent& event) + { + m_container.SetLastFocus(event.GetWindow()); + event.Skip(); + } +#endif // !wxHAS_NATIVE_TAB_TRAVERSAL + + wxControlContainer m_container; + + + wxDECLARE_NO_COPY_TEMPLATE_CLASS(wxNavigationEnabled, W); +}; + +// ---------------------------------------------------------------------------- +// Compatibility macros from now on, do NOT use them and preferably do not even +// look at them. +// ---------------------------------------------------------------------------- + +#if WXWIN_COMPATIBILITY_2_8 + // common part of WX_DECLARE_CONTROL_CONTAINER in the native and generic cases, // it should be used in the wxWindow-derived class declaration #define WX_DECLARE_CONTROL_CONTAINER_BASE() \ @@ -113,10 +281,6 @@ public: \ virtual void RemoveChild(wxWindowBase *child); \ virtual void SetFocus(); \ void SetFocusIgnoringChildren(); \ - void AcceptFocus(bool acceptFocus) \ - { \ - m_container.SetCanFocus(acceptFocus); \ - } \ \ protected: \ wxControlContainer m_container @@ -132,7 +296,7 @@ protected: \ { \ basename::AddChild(child); \ \ - m_container.UpdateCanFocus(); \ + m_container.UpdateCanFocusChildren(); \ } \ \ bool classname::AcceptsFocusRecursively() const \ @@ -156,19 +320,8 @@ protected: \ return m_container.AcceptsFocusFromKeyboard(); \ } -#ifdef wxHAS_NATIVE_TAB_TRAVERSAL - -// ---------------------------------------------------------------------------- -// wxControlContainer for native TAB navigation -// ---------------------------------------------------------------------------- -// this must be a real class as we forward-declare it elsewhere -class WXDLLIMPEXP_CORE wxControlContainer : public wxControlContainerBase -{ -protected: - // set the focus to the child which had it the last time - virtual bool SetFocusToChild(); -}; +#ifdef wxHAS_NATIVE_TAB_TRAVERSAL #define WX_EVENT_TABLE_CONTROL_CONTAINER(classname) @@ -181,7 +334,7 @@ protected: { \ basename::RemoveChild(child); \ \ - m_container.UpdateCanFocus(); \ + m_container.UpdateCanFocusChildren(); \ } \ \ void classname::SetFocusIgnoringChildren() \ @@ -191,38 +344,6 @@ protected: #else // !wxHAS_NATIVE_TAB_TRAVERSAL -class WXDLLIMPEXP_FWD_CORE wxFocusEvent; -class WXDLLIMPEXP_FWD_CORE wxNavigationKeyEvent; - -// ---------------------------------------------------------------------------- -// wxControlContainer for TAB navigation implemented in wx itself -// ---------------------------------------------------------------------------- - -class WXDLLIMPEXP_CORE wxControlContainer : public wxControlContainerBase -{ -public: - // default ctor, SetContainerWindow() must be called later - wxControlContainer(); - - // the methods to be called from the window event handlers - void HandleOnNavigationKey(wxNavigationKeyEvent& event); - void HandleOnFocus(wxFocusEvent& event); - void HandleOnWindowDestroy(wxWindowBase *child); - - // called from OnChildFocus() handler, i.e. when one of our (grand) - // children gets the focus - void SetLastFocus(wxWindow *win); - -protected: - - DECLARE_NO_COPY_CLASS(wxControlContainer) -}; - -// ---------------------------------------------------------------------------- -// macros which may be used by the classes wishing to implement TAB navigation -// among their children -// ---------------------------------------------------------------------------- - // declare the methods to be forwarded #define WX_DECLARE_CONTROL_CONTAINER() \ WX_DECLARE_CONTROL_CONTAINER_BASE(); \ @@ -248,7 +369,7 @@ public: \ \ basename::RemoveChild(child); \ \ - m_container.UpdateCanFocus(); \ + m_container.UpdateCanFocusChildren(); \ } \ \ void classname::OnNavigationKey( wxNavigationKeyEvent& event ) \ @@ -274,7 +395,6 @@ public: \ #endif // wxHAS_NATIVE_TAB_TRAVERSAL/!wxHAS_NATIVE_TAB_TRAVERSAL -// this function is for wxWidgets internal use only -extern bool wxSetFocusToChild(wxWindow *win, wxWindow **child); +#endif // WXWIN_COMPATIBILITY_2_8 #endif // _WX_CONTAINR_H_