test whether pointer is non-NULL before using it, not after, in wxAnimation::Load...

[wxWidgets.git] / include / wx / window.h

diff --git a/include/wx/window.h b/include/wx/window.h
index 9e732457529e6ef6407d62b7aa24adb47660ebf4..2dde62f41fe18e06dd5d7fd6dcc4113be83618c0 100644 (file)
--- a/include/wx/window.h
+++ b/include/wx/window.h
@@ -571,16 +571,35 @@ public:
 
     static wxWindow *DoFindFocus() /* = 0: implement in derived classes */;
 
-        // can this window have focus?
-    virtual bool AcceptsFocus() const { return IsShown() && IsEnabled(); }
+        // can this window have focus in principle?
+        //
+        // the difference between AcceptsFocus[FromKeyboard]() and CanAcceptFocus
+        // [FromKeyboard]() is that the former functions are meant to be
+        // overridden in the derived classes to simply return false if the
+        // control can't have focus, while the latter are meant to be used by
+        // this class clients and take into account the current window state
+    virtual bool AcceptsFocus() const { return true; }
+
+        // can this window have focus right now?
+    bool CanAcceptFocus() const { return AcceptsFocus() && IsShown() && IsEnabled(); }
 
         // can this window be given focus by keyboard navigation? if not, the
         // only way to give it focus (provided it accepts it at all) is to
         // click it
     virtual bool AcceptsFocusFromKeyboard() const { return AcceptsFocus(); }
 
-        // navigates in the specified direction by sending a wxNavigationKeyEvent
-    virtual bool Navigate(int flags = wxNavigationKeyEvent::IsForward);
+        // can this window be assigned focus from keyboard right now?
+    bool CanAcceptFocusFromKeyboard() const
+        { return AcceptsFocusFromKeyboard() && CanAcceptFocus(); }
+
+        // navigates inside this window
+    bool NavigateIn(int flags = wxNavigationKeyEvent::IsForward)
+        { return DoNavigateIn(flags); }
+
+        // navigates in the specified direction from this window, this is
+        // equivalent to GetParent()->NavigateIn()
+    bool Navigate(int flags = wxNavigationKeyEvent::IsForward)
+        { return m_parent && ((wxWindowBase *)m_parent)->DoNavigateIn(flags); }
 
         // move this window just before/after the specified one in tab order
         // (the other window must be our sibling!)
@@ -1187,6 +1206,10 @@ protected:
     };
     virtual void DoMoveInTabOrder(wxWindow *win, MoveKind move);
 
+    // implementation of Navigate() and NavigateIn()
+    virtual bool DoNavigateIn(int flags);
+
+
 #if wxUSE_CONSTRAINTS
     // satisfy the constraints for the windows but don't set the window sizes
     void SatisfyConstraints();