///////////////////////////////////////////////////////////////////////////////
// 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 <zeitlin@dptmaths.ens-cachan.fr>
+// Copyright: (c) 2001, 2011 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#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.
*/
// ----------------------------------------------------------------------------
{
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;
}
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
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 W>
+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() \
virtual void RemoveChild(wxWindowBase *child); \
virtual void SetFocus(); \
void SetFocusIgnoringChildren(); \
- void AcceptFocus(bool acceptFocus) \
- { \
- m_container.SetCanFocus(acceptFocus); \
- } \
\
protected: \
wxControlContainer m_container
{ \
basename::AddChild(child); \
\
- m_container.UpdateCanFocus(); \
+ m_container.UpdateCanFocusChildren(); \
} \
\
bool classname::AcceptsFocusRecursively() const \
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)
{ \
basename::RemoveChild(child); \
\
- m_container.UpdateCanFocus(); \
+ m_container.UpdateCanFocusChildren(); \
} \
\
void classname::SetFocusIgnoringChildren() \
#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:
-
- wxDECLARE_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(); \
\
basename::RemoveChild(child); \
\
- m_container.UpdateCanFocus(); \
+ m_container.UpdateCanFocusChildren(); \
} \
\
void classname::OnNavigationKey( wxNavigationKeyEvent& event ) \
#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_
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