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diff --git a/NxWidgets/UnitTests/CRadioButton/cradiobuttontest.cxx b/NxWidgets/UnitTests/CRadioButton/cradiobuttontest.cxx
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+++ b/NxWidgets/UnitTests/CRadioButton/cradiobuttontest.cxx
@@ -0,0 +1,305 @@
+/////////////////////////////////////////////////////////////////////////////
+// NxWidgets/UnitTests/CRadioButton/cradiobuttontest.cxx
+//
+//   Copyright (C) 2012 Gregory Nutt. All rights reserved.
+//   Author: Gregory Nutt <gnutt@nuttx.org>
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+// 1. Redistributions of source code must retain the above copyright
+//    notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+//    notice, this list of conditions and the following disclaimer in
+//    the documentation and/or other materials provided with the
+//    distribution.
+// 3. Neither the name NuttX, NxWidgets, nor the names of its contributors
+//    me be used to endorse or promote products derived from this software
+//    without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+//////////////////////////////////////////////////////////////////////////////
+
+/////////////////////////////////////////////////////////////////////////////
+// Included Files
+/////////////////////////////////////////////////////////////////////////////
+
+#include <nuttx/config.h>
+
+#include <nuttx/init.h>
+#include <cstdio>
+#include <cerrno>
+#include <debug.h>
+
+#include <nuttx/nx/nx.h>
+#include <nuttx/nx/nxfonts.h>
+
+#include "nxconfig.hxx"
+#include "cbgwindow.hxx"
+#include "cradiobuttontest.hxx"
+#include "cbitmap.hxx"
+#include "glyphs.hxx"
+
+/////////////////////////////////////////////////////////////////////////////
+// Definitions
+/////////////////////////////////////////////////////////////////////////////
+
+/////////////////////////////////////////////////////////////////////////////
+// Private Classes
+/////////////////////////////////////////////////////////////////////////////
+
+/////////////////////////////////////////////////////////////////////////////
+// Private Data
+/////////////////////////////////////////////////////////////////////////////
+
+/////////////////////////////////////////////////////////////////////////////
+// Public Data
+/////////////////////////////////////////////////////////////////////////////
+
+/////////////////////////////////////////////////////////////////////////////
+// Public Function Prototypes
+/////////////////////////////////////////////////////////////////////////////
+
+/////////////////////////////////////////////////////////////////////////////
+// CRadioButtonTest Method Implementations
+/////////////////////////////////////////////////////////////////////////////
+
+// CRadioButtonTest Constructor
+
+CRadioButtonTest::CRadioButtonTest()
+{
+  // Initialize state data
+
+  m_widgetControl = (CWidgetControl *)NULL;
+  m_bgWindow      = (CBgWindow *)NULL;
+
+  // Peek at the radio button glyph to get a good estimate of the size
+
+  m_size.w        = g_radioButtonOn.width;
+  m_size.h        = g_radioButtonOn.height;
+}
+
+// CRadioButtonTest Descriptor
+
+CRadioButtonTest::~CRadioButtonTest(void)
+{
+  disconnect();
+}
+
+// Connect to the NX server
+
+bool CRadioButtonTest::connect(void)
+{
+  // Connect to the server
+
+  bool nxConnected = CNxServer::connect();
+  if (nxConnected)
+    {
+      // Set the background color
+
+      if (!setBackgroundColor(CONFIG_CRADIOBUTTONTEST_BGCOLOR))
+        {
+          message("CRadioButtonTest::connect: setBackgroundColor failed\n");
+        }
+    }
+
+  return nxConnected;
+}
+
+// Disconnect from the NX server
+
+void CRadioButtonTest::disconnect(void)
+{
+  // Free the radiobutton group
+
+  if (m_radioButtonGroup)
+    {
+      delete m_radioButtonGroup;
+      m_radioButtonGroup = (CRadioButtonGroup *)NULL;
+    }
+
+  // Close the window
+
+  if (m_bgWindow)
+    {
+      delete m_bgWindow;
+    }
+
+  // Free the widget control instance
+
+  if (m_widgetControl)
+    {
+      delete m_widgetControl;
+    }
+
+  // And disconnect from the server
+
+  CNxServer::disconnect();
+}
+
+// Create the background window instance.  This function illustrates
+// the basic steps to instantiate any window:
+//
+// 1) Create a dumb CWigetControl instance
+// 2) Pass the dumb CWidgetControl instance to the window constructor
+//    that inherits from INxWindow.  This will "smarten" the CWidgetControl
+//    instance with some window knowlede
+// 3) Call the open() method on the window to display the window.
+// 4) After that, the fully smartened CWidgetControl instance can
+//    be used to generate additional widgets by passing it to the
+//    widget constructor
+
+bool CRadioButtonTest::createWindow(void)
+{
+  // Initialize the widget control using the default style
+
+  m_widgetControl = new CWidgetControl((CWidgetStyle *)NULL);
+
+  // Get an (uninitialized) instance of the background window as a class
+  // that derives from INxWindow.
+
+  m_bgWindow = getBgWindow(m_widgetControl);
+  if (!m_bgWindow)
+    {
+      message("CRadioButtonTest::createGraphics: Failed to create CBgWindow instance\n");
+      delete m_widgetControl;
+      return false;
+    }
+
+  // Open (and initialize) the window
+
+  bool success = m_bgWindow->open();
+  if (!success)
+    {
+      message("CRadioButtonTest::createGraphics: Failed to open background window\n");
+      delete m_bgWindow;
+      m_bgWindow = (CBgWindow*)0;
+      return false;
+    }
+
+  return true;
+}
+
+// Create a CRadioButton instance
+
+CRadioButton *CRadioButtonTest::newRadioButton(void)
+{
+  // Get the width of the display
+
+  struct nxgl_size_s windowSize;
+  if (!m_bgWindow->getSize(&windowSize))
+    {
+      message("CRadioButtonTest::newRadioButton: Failed to get window size\n");
+      return (CRadioButton *)NULL;
+    }
+
+  // Create the radio button group, if we have not already done so
+
+  if (!m_radioButtonGroup)
+    {
+      // Start the radio button group in the center of the upper, left
+      // quadrant.  The initial size is 0,0 and the default style is used.
+ 
+      nxgl_coord_t groupX = windowSize.w >> 2;
+      nxgl_coord_t groupY = windowSize.h >> 2;
+
+      m_radioButtonGroup = new CRadioButtonGroup(m_widgetControl, groupX, groupY);
+      if (!m_radioButtonGroup)
+        {
+          message("CRadioButtonTest::newRadioButton: Failed to create the radio button group\n");
+          return (CRadioButton *)NULL;
+        }
+    }
+
+  // Create the new radio button at the botton of the radio button group and
+  // with the size of the ON radio button glyph (they all need to be the same
+  // size!).  Note that coordinates are relative to the parent bounding box.
+
+  nxgl_coord_t buttonX = 0;
+  nxgl_coord_t buttonY = m_radioButtonGroup->getHeight();
+
+  return m_radioButtonGroup->newRadioButton(buttonX, buttonY, m_size.w, m_size.h);
+}
+
+// (Re-)draw the buttons.
+
+void CRadioButtonTest::showButtons(void)
+{
+  m_radioButtonGroup->enable();        // Un-necessary, the widget is enabled by default
+  m_radioButtonGroup->enableDrawing();
+  m_radioButtonGroup->redraw();
+}
+
+// Push the radio button
+
+void CRadioButtonTest::pushButton(CRadioButton *button)
+{
+  // Get the button center coordinates
+
+  nxgl_coord_t buttonX = button->getX() + (button->getWidth() >> 1);
+  nxgl_coord_t buttonY = button->getY() + (button->getHeight() >> 1);
+
+  // Then push the button by calling nx_mousein.  nx_mousein is meant to be
+  // called by mouse handling software. Here we just inject a left-button click
+  // directly in the center of the radio button.
+
+  // First, get the server handle.  Graphics software will never care
+  // about the server handle.  Here we need it to get access to the
+  // low-level mouse interface
+
+  NXHANDLE handle = getServer();
+
+  // Then inject the mouse click
+
+  (void)nx_mousein(handle, buttonX, buttonY, NX_MOUSE_LEFTBUTTON);
+
+  // Poll for mouse events
+  //
+  // Widget events are normally handled in a modal loop (by calling goModal()).
+  // However, for this case we know that we just pressed the mouse button
+  // so we don't have to poll.  We can just perform a one pass poll then
+  // then check if the mouse event was processed corredly.
+
+  m_widgetControl->pollEvents(m_radioButtonGroup);
+
+  // Then inject the mouse release
+
+  (void)nx_mousein(handle, buttonX, buttonY, 0);
+
+  // And poll for more mouse events
+
+  m_widgetControl->pollEvents(m_radioButtonGroup);
+
+  // And re-draw the buttons (the mouse click event should have automatically
+  // triggered the re-draw)
+  //
+  // showButtons();
+}
+
+// Show the state of the radio button group
+
+void CRadioButtonTest::showButtonState(void)
+{
+  int index = m_radioButtonGroup->getSelectedIndex();
+  if (index < 0)
+    {
+      message("CRadioButtonTest::showButtonState No button is pressed\n");
+    }
+  else
+    {
+      message("CRadioButtonTest::showButtonState button%d is selected\n", index+1);
+    }
+}