From 463df5a58a99b0058de715451ef3039545d44438 Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Tue, 23 Sep 2014 17:44:08 +0000
Subject: [PATCH] use cairo implement rotated text

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@77854 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775
---
 src/x11/dcclient.cpp | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/src/x11/dcclient.cpp b/src/x11/dcclient.cpp
index 13effdd781..28b2edb5c4 100644
--- a/src/x11/dcclient.cpp
+++ b/src/x11/dcclient.cpp
@@ -1664,7 +1664,23 @@ void wxWindowDCImpl::DoDrawRotatedText(const wxString& WXUNUSED(text),
                                    wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
                                    double angle)
 {
-    wxFAIL_MSG( "not implemented" );
+    // use cairo to draw rotated text
+    cairo_surface_t *surface;
+    surface = cairo_xlib_surface_create((Display*) m_display, (Drawable) m_x11window,
+                    DefaultVisual((Display*) m_display, 0), x, y);
+    cairo_t *cr = cairo_create(surface);
+
+    cairo_save(cr);
+    cairo_move_to (cr, x, y);
+
+    // cairo use radians, but wxWidgets use degree
+    // so convert degrees to radians first.
+    // and wxWidgets is counter clock, so plus minus.
+    cairo_rotate(cr, -angle * (M_PI / 180));
+
+    cairo_show_text (cr, text);
+    cairo_restore(cr);
+    cairo_destroy(cr);
 }
 
 void wxWindowDCImpl::DoGetTextExtent( const wxString &string, wxCoord *width, wxCoord *height,