wxCaret now uses backing store instead of forcing window refresh each time the

caret is hidden; the non blinking carets work too


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@8403 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/caret.h

@@ -196,5 +196,31 @@ private:
     #include "wx/generic/caret.h"
 #endif // platform
 
+// ----------------------------------------------------------------------------
+// wxCaretSuspend: a simple class which hides the caret in its ctor and
+// restores it in the dtor, this should be used when drawing on the screen to
+// avoid overdrawing the caret
+// ----------------------------------------------------------------------------
+
+class WXDLLEXPORT wxCaretSuspend
+{
+public:
+    wxCaretSuspend(wxWindow *win)
+    {
+        m_caret = win->GetCaret();
+        if ( m_caret )
+            m_caret->Hide();
+    }
+
+    ~wxCaretSuspend()
+    {
+        if ( m_caret )
+            m_caret->Show();
+    }
+
+private:
+    wxCaret *m_caret;
+};
+
 #endif // _WX_CARET_H_BASE_
 

include/wx/generic/caret.h

@@ -73,6 +73,12 @@ private:
     // GTK specific initialization
     void InitGeneric();
 
+    // the bitmap holding the part of window hidden by the caret when it was
+    // at (m_xOld, m_yOld)
+    wxBitmap      m_bmpUnderCaret;
+    int           m_xOld,
+                  m_yOld;
+
     wxCaretTimer  m_timer;
     bool          m_blinkedOut,     // TRUE => caret hidden right now
                   m_hasFocus;       // TRUE => our window has focus