Upgrade WX to r74856, mainly to support @2x.

Externals/wxWidgets3/include/wx/msw/private/textmeasure.h

@@ -0,0 +1,63 @@
+///////////////////////////////////////////////////////////////////////////////
+// Name:        wx/msw/private/textmeasure.h
+// Purpose:     wxMSW-specific declaration of wxTextMeasure class
+// Author:      Manuel Martin
+// Created:     2012-10-05
+// Copyright:   (c) 1997-2012 wxWidgets team
+// Licence:     wxWindows licence
+///////////////////////////////////////////////////////////////////////////////
+
+#ifndef _WX_MSW_PRIVATE_TEXTMEASURE_H_
+#define _WX_MSW_PRIVATE_TEXTMEASURE_H_
+
+#include "wx/msw/wrapwin.h"
+
+// ----------------------------------------------------------------------------
+// wxTextMeasure for MSW.
+// ----------------------------------------------------------------------------
+
+class wxTextMeasure : public wxTextMeasureBase
+{
+public:
+    wxEXPLICIT wxTextMeasure(const wxDC *dc, const wxFont *font = NULL)
+        : wxTextMeasureBase(dc, font)
+    {
+        Init();
+    }
+
+    wxEXPLICIT wxTextMeasure(const wxWindow *win, const wxFont *font = NULL)
+        : wxTextMeasureBase(win, font)
+    {
+        Init();
+    }
+
+protected:
+    void Init();
+
+    virtual void BeginMeasuring();
+    virtual void EndMeasuring();
+
+    virtual void DoGetTextExtent(const wxString& string,
+                               wxCoord *width,
+                               wxCoord *height,
+                               wxCoord *descent = NULL,
+                               wxCoord *externalLeading = NULL);
+
+    virtual bool DoGetPartialTextExtents(const wxString& text,
+                                         wxArrayInt& widths,
+                                         double scaleX);
+
+
+
+    // We use either the HDC of the provided wxDC or an HDC created for our
+    // window.
+    HDC m_hdc;
+
+    // If we change the font in BeginMeasuring(), we restore it to the old one
+    // in EndMeasuring().
+    HFONT m_hfontOld;
+
+    wxDECLARE_NO_COPY_CLASS(wxTextMeasure);
+};
+
+#endif // _WX_MSW_PRIVATE_TEXTMEASURE_H_