Support using GetTextExtent() with empty string to get descent in wxOSX.

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

diff --git a/include/wx/window.h b/include/wx/window.h
index c4442b21414c9153e745871ca4b3e9e0fa0f86db..52c7a4c466bacd097afd74c1044deffc79efad59 100644 (file)
--- a/include/wx/window.h
+++ b/include/wx/window.h
@@ -379,6 +379,13 @@ public:
             *h = s.y;
     }
 
             *h = s.y;
     }
 

+        // Determine the best size in the other direction if one of them is
+        // fixed. This is used with windows that can wrap their contents and
+        // returns input-independent best size for the others.
+    int GetBestHeight(int width) const;
+    int GetBestWidth(int height) const;
+
+

     void SetScrollHelper( wxScrollHelper *sh )   { m_scrollHelper = sh; }
     wxScrollHelper *GetScrollHelper()            { return m_scrollHelper; }
 
     void SetScrollHelper( wxScrollHelper *sh )   { m_scrollHelper = sh; }
     wxScrollHelper *GetScrollHelper()            { return m_scrollHelper; }
 


@@ -514,6 +521,11 @@ public:
         return wxSize( wxMax( client.x, best.x ), wxMax( client.y, best.y ) );
     }
 
         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;
     // return the size of the left/right and top/bottom borders in x and y
     // components of the result respectively
     virtual wxSize GetWindowBorderSize() const;


@@ -548,6 +560,43 @@ public:
     // this is the same as SendSizeEventToParent() but using PostSizeEvent()
     void PostSizeEventToParent() { SendSizeEventToParent(wxSEND_EVENT_POST); }
 
     // 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
     // ------------
 
     // window state
     // ------------


@@ -623,9 +672,10 @@ public:
 
     bool HasExtraStyle(int exFlag) const { return (m_exStyle & exFlag) != 0; }
 
 
     bool HasExtraStyle(int exFlag) const { return (m_exStyle & exFlag) != 0; }
 

+#if WXWIN_COMPATIBILITY_2_8

         // make the window modal (all other windows unresponsive)
         // make the window modal (all other windows unresponsive)

-    virtual void MakeModal(bool modal = true);
-
+    wxDEPRECATED( virtual void MakeModal(bool modal = true) );
+#endif

 
     // (primitive) theming support
     // ---------------------------
 
     // (primitive) theming support
     // ---------------------------


@@ -739,8 +789,12 @@ public:
         // is this window a top level one?
     virtual bool IsTopLevel() const;
 
         // is this window a top level one?
     virtual bool IsTopLevel() const;
 

+        // is this window a child or grand child of this one (inside the same
+        // TLW)?
+    bool IsDescendant(wxWindowBase* win) const;
+

         // it doesn't really change parent, use Reparent() instead
         // it doesn't really change parent, use Reparent() instead

-    void SetParent( wxWindowBase *parent ) { m_parent = (wxWindow *)parent; }
+    void SetParent( wxWindowBase *parent );

         // change the real parent of this window, return true if the parent
         // was changed, false otherwise (error or newParent == oldParent)
     virtual bool Reparent( wxWindowBase *newParent );
         // change the real parent of this window, return true if the parent
         // was changed, false otherwise (error or newParent == oldParent)
     virtual bool Reparent( wxWindowBase *newParent );


@@ -1499,11 +1553,6 @@ protected:
     // widgets state are necessary
     virtual void DoEnable(bool WXUNUSED(enable)) { }
 
     // widgets state are necessary
     virtual void DoEnable(bool WXUNUSED(enable)) { }
 

-    // called when the on-screen widget state changes and provides an
-    // an opportunity for the widget to update its visual state (colours,
-    // fonts, anything else) as necessary
-    virtual void OnEnabled(bool WXUNUSED(enabled)) { }
-

 
     // the window id - a number which uniquely identifies a window among
     // its siblings unless it is wxID_ANY
 
     // the window id - a number which uniquely identifies a window among
     // its siblings unless it is wxID_ANY


@@ -1682,6 +1731,14 @@ protected:
     // (GetBorderSize() will be used to add them)
     virtual wxSize DoGetBestClientSize() const { return wxDefaultSize; }
 
     // (GetBorderSize() will be used to add them)
     virtual wxSize DoGetBestClientSize() const { return wxDefaultSize; }
 

+    // These two methods can be overridden to implement intelligent
+    // width-for-height and/or height-for-width best size determination for the
+    // window. By default the fixed best size is used.
+    virtual int DoGetBestClientHeight(int WXUNUSED(width)) const
+        { return wxDefaultCoord; }
+    virtual int DoGetBestClientWidth(int WXUNUSED(height)) const
+        { return wxDefaultCoord; }
+

     // this is the virtual function to be overridden in any derived class which
     // wants to change how SetSize() or Move() works - it is called by all
     // versions of these functions in the base class
     // this is the virtual function to be overridden in any derived class which
     // wants to change how SetSize() or Move() works - it is called by all
     // versions of these functions in the base class


@@ -1748,7 +1805,7 @@ protected:
     static void NotifyCaptureLost();
 
 private:
     static void NotifyCaptureLost();
 
 private:

-    // recursively call our own and our children OnEnabled() when the
+    // recursively call our own and our children DoEnable() when the

     // enabled/disabled status changed because a parent window had been
     // enabled/disabled
     void NotifyWindowOnEnableChange(bool enabled);
     // enabled/disabled status changed because a parent window had been
     // enabled/disabled
     void NotifyWindowOnEnableChange(bool enabled);