X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/00a399c062ce76fbfa9ea0bc2c208a9a144a7528..66c2bf7b1d9326fb650acfaae22ec50528cfbf7c:/include/wx/window.h

diff --git a/include/wx/window.h b/include/wx/window.h
index 22f7a5b0ee..199c4b7ef3 100644
--- a/include/wx/window.h
+++ b/include/wx/window.h
@@ -4,7 +4,6 @@
 // Author:      Vadim Zeitlin
 // Modified by: Ron Lee
 // Created:     01/02/97
-// RCS-ID:      $Id$
 // Copyright:   (c) Vadim Zeitlin
 // Licence:     wxWindows licence
 ///////////////////////////////////////////////////////////////////////////////
@@ -521,6 +520,11 @@ public:
         return wxSize( wxMax( client.x, best.x ), wxMax( client.y, best.y ) );
     }
 
+    // returns the magnification of the content of this window
+    // eg 2.0 for a window on a retina screen
+    virtual double GetContentScaleFactor() const
+    { return 1.0; }
+    
     // return the size of the left/right and top/bottom borders in x and y
     // components of the result respectively
     virtual wxSize GetWindowBorderSize() const;
@@ -555,6 +559,43 @@ public:
     // this is the same as SendSizeEventToParent() but using PostSizeEvent()
     void PostSizeEventToParent() { SendSizeEventToParent(wxSEND_EVENT_POST); }
 
+    // These functions should be used before repositioning the children of
+    // this window to reduce flicker or, in MSW case, even avoid display
+    // corruption in some situations (so they're more than just optimization).
+    //
+    // EndRepositioningChildren() should be called if and only if
+    // BeginRepositioningChildren() returns true. To ensure that this is always
+    // done automatically, use ChildrenRepositioningGuard class below.
+    virtual bool BeginRepositioningChildren() { return false; }
+    virtual void EndRepositioningChildren() { }
+
+    // A simple helper which ensures that EndRepositioningChildren() is called
+    // from its dtor if and only if calling BeginRepositioningChildren() from
+    // the ctor returned true.
+    class ChildrenRepositioningGuard
+    {
+    public:
+        // Notice that window can be NULL here, for convenience. In this case
+        // this class simply doesn't do anything.
+        wxEXPLICIT ChildrenRepositioningGuard(wxWindowBase* win)
+            : m_win(win),
+              m_callEnd(win && win->BeginRepositioningChildren())
+        {
+        }
+
+        ~ChildrenRepositioningGuard()
+        {
+            if ( m_callEnd )
+                m_win->EndRepositioningChildren();
+        }
+
+    private:
+        wxWindowBase* const m_win;
+        const bool m_callEnd;
+
+        wxDECLARE_NO_COPY_CLASS(ChildrenRepositioningGuard);
+    };
+
 
     // window state
     // ------------
@@ -682,8 +723,13 @@ public:
     virtual bool AcceptsFocusFromKeyboard() const { return AcceptsFocus(); }
 
 
-        // this is mostly a helper for the various functions using it below
-    bool CanBeFocused() const { return IsShown() && IsEnabled(); }
+        // Can this window be focused right now, in its current state? This
+        // shouldn't be called at all if AcceptsFocus() returns false.
+        //
+        // It is a convenient helper for the various functions using it below
+        // but also a hook allowing to override the default logic for some rare
+        // cases (currently just wxRadioBox in wxMSW) when it's inappropriate.
+    virtual bool CanBeFocused() const { return IsShown() && IsEnabled(); }
 
         // can this window itself have focus?
     bool IsFocusable() const { return AcceptsFocus() && CanBeFocused(); }
@@ -1175,11 +1221,7 @@ public:
     // ----------
 
         // can the window have the scrollbar in this orientation?
-    bool CanScroll(int orient) const
-    {
-        return (m_windowStyle &
-                (orient == wxHORIZONTAL ? wxHSCROLL : wxVSCROLL)) != 0;
-    }
+    virtual bool CanScroll(int orient) const;
 
         // does the window have the scrollbar in this orientation?
     bool HasScrollbar(int orient) const;
@@ -1784,15 +1826,6 @@ private:
     // base for dialog unit conversion, i.e. average character size
     wxSize GetDlgUnitBase() const;
 
-    // the stack of windows which have captured the mouse
-    static struct WXDLLIMPEXP_FWD_CORE wxWindowNext *ms_winCaptureNext;
-
-    // the window that currently has mouse capture
-    static wxWindow *ms_winCaptureCurrent;
-
-    // indicates if execution is inside CaptureMouse/ReleaseMouse
-    static bool ms_winCaptureChanging;
-
 
     // number of Freeze() calls minus the number of Thaw() calls: we're frozen
     // (i.e. not being updated) if it is positive