added and documented wx_const/static_cast<>

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

diff --git a/include/wx/vscroll.h b/include/wx/vscroll.h
index a48faef6e3f52d8f7fac5962514efc634ec93e5a..d04ba462d446297fa01840155d2b20e5bf997d03 100644 (file)
--- a/include/wx/vscroll.h
+++ b/include/wx/vscroll.h
@@ -12,6 +12,10 @@
 #ifndef _WX_VSCROLL_H_
 #define _WX_VSCROLL_H_
 
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
+#pragma interface "vscroll.h"
+#endif
+
 #include "wx/panel.h"           // base class
 
 // ----------------------------------------------------------------------------
@@ -142,7 +146,18 @@ protected:
     //
     // finally note that lineMin is inclusive, while lineMax is exclusive, as
     // usual
-    virtual void OnGetLinesHint(size_t lineMin, size_t lineMax) const { }
+    virtual void OnGetLinesHint(size_t WXUNUSED(lineMin),
+                                size_t WXUNUSED(lineMax)) const { }
+
+    // when the number of lines changes, we try to estimate the total height
+    // of all lines which is a rather expensive operation in terms of lines
+    // access, so if the user code may estimate the average height
+    // better/faster than we do, it should override this function to implement
+    // its own logic
+    //
+    // this function should return the best guess for the total height it may
+    // make
+    virtual wxCoord EstimateTotalHeight() const;
 
 
     // the event handlers
@@ -180,6 +195,8 @@ private:
 
 
     DECLARE_EVENT_TABLE()
+    DECLARE_NO_COPY_CLASS(wxVScrolledWindow)
+    DECLARE_ABSTRACT_CLASS(wxVScrolledWindow)
 };
 
 #endif // _WX_VSCROLL_H_