Add an NxWM console/keyboard thread and eliminate all issues with NxConsole window serial input

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@4755 42af7a65-404d-4744-a932-0658087f49c3

11 files changed, 529 insertions, 18 deletions

diff --git a/NxWidgets/ChangeLog.txt b/NxWidgets/ChangeLog.txt
index c61d48375..9a5855252 100644
--- a/NxWidgets/ChangeLog.txt
+++ b/NxWidgets/ChangeLog.txt
@@ -124,3 +124,15 @@
 * NxWM:CNxConsole:  Configures the NxConsole window to redirectin keyboard
   input to the NxConsole; redirects standard input to the NxConsole
   device driver.
+* NxWM:CKeyboard:  Add a new class that implements a keyboard listener
+  thread.  This thread reads from /dev/console and injects the keyboard
+  input into NX.  NX will determine which window is at the top of the
+  heirarchy and re-direct the keyboard input to only that top window.
+  This solves an important problem with, for example, running multiple
+  copies of the NxConsole:  On the copy of the NxConsole at the top of
+  the heirarchy should get the keyboard input.
+* UnitTests/nxwm/main.cxx: Now starts the keyboard thread if
+  CONFIG_NXWM_KEYBOARD is defined.
+* NxWM::CTaskbar:  After drawing the task bar, need to raise the
+  application window otherwise the taskbar will be on the top and
+  keyboard input will not be received by the top application.
diff --git a/NxWidgets/TODO.txt b/NxWidgets/TODO.txt
index 6264d2f3d..e47b3cf1a 100644
--- a/NxWidgets/TODO.txt
+++ b/NxWidgets/TODO.txt
@@ -72,7 +72,9 @@ o NxConsole Issues
                NxConsoles get their input from /dev/console which is the serial
                port.  The necessary change is to create an NX input device for
                /dev/console that will get its input from NX.
-  Status:      Open
+  Status:      Closed with was fixed with the last check of 5/20/2012 (about
+               SVN version 4754).  The fixed version is available in SVN but
+               won't be in a released version until NxWidgets-1.2 is released.
   Priority:    Medium high, basically prohibits the use of multiple NSH windows.
   
   Title:       CLOSING AN NxCONSOLE
@@ -81,7 +83,9 @@ o NxConsole Issues
                you close one of the NxConsoles, then the others no longer
                received input (or no long generate output -- that cannot be
                distinguished).
-  Status:      Open
+  Status:      Closed with was fixed with the last check of 5/20/2012 (about
+               SVN version 4754).  The fixed version is available in SVN but
+               won't be in a released version until NxWidgets-1.2 is released.
   Priority:    Medium high, basically prohibits the use of multiple NSH windows.
 
   Title:       DOUBLE DISPLAY UPDATES
diff --git a/NxWidgets/UnitTests/nxwm/main.cxx b/NxWidgets/UnitTests/nxwm/main.cxx
index 86ea324d5..3cc85dc43 100644
--- a/NxWidgets/UnitTests/nxwm/main.cxx
+++ b/NxWidgets/UnitTests/nxwm/main.cxx
@@ -53,6 +53,10 @@
 #  include "ccalibration.hxx"
 #endif
 
+#ifdef CONFIG_NXWM_KEYBOARD
+#  include "ckeyboard.hxx"
+#endif
+
 /////////////////////////////////////////////////////////////////////////////
 // Pre-processor Definitions
 /////////////////////////////////////////////////////////////////////////////
@@ -408,7 +412,7 @@ static bool createTouchScreen(void)
       printf("createTouchScreen: ERROR: Failed to create CTouchscreen\n");
       return false;
     }
-  showTestCaseMemory("createTouchScreen: createTouchScreen: After creating CTouchscreen");
+  showTestCaseMemory("createTouchScreen: After creating CTouchscreen");
 
   printf("createTouchScreen: Start touchscreen listener\n");
   if (!g_nxwmtest.touchscreen->start())
@@ -424,6 +428,35 @@ static bool createTouchScreen(void)
 #endif
 
 /////////////////////////////////////////////////////////////////////////////
+// Name: createKeyboard
+/////////////////////////////////////////////////////////////////////////////
+
+#ifdef CONFIG_NXWM_KEYBOARD
+static bool createKeyboard(void)
+{
+  printf("createKeyboard: Creating CKeyboard\n");
+  NxWM::CKeyboard *keyboard = new NxWM::CKeyboard(g_nxwmtest.taskbar);
+  if (!keyboard)
+    {
+      printf("createKeyboard: ERROR: Failed to create CKeyboard\n");
+      return false;
+    }
+  showTestCaseMemory("createKeyboard After creating CKeyboard");
+
+  printf("createKeyboard: Start keyboard listener\n");
+  if (!keyboard->start())
+    {
+      printf("createKeyboard: ERROR: Failed start the keyboard listener\n");
+      delete keyboard;
+      return false;
+    }
+
+  showTestCaseMemory("createKeyboard: After starting the keyboard listener");
+  return true;
+}
+#endif
+
+/////////////////////////////////////////////////////////////////////////////
 // Name: createCalibration
 /////////////////////////////////////////////////////////////////////////////
 
@@ -574,6 +607,16 @@ int MAIN_NAME(int argc, char *argv[])
       testCleanUpAndExit(EXIT_FAILURE);
     }
 
+  // Create the keyboard device
+
+#ifdef CONFIG_NXWM_KEYBOARD
+  if (!createKeyboard())
+    {
+      printf(MAIN_STRING "ERROR: Failed to create the keyboard\n");
+      testCleanUpAndExit(EXIT_FAILURE);
+    }
+#endif
+
   // Create the touchscreen device
 
 #ifdef CONFIG_NXWM_TOUCHSCREEN
diff --git a/NxWidgets/libnxwidgets/include/ccallback.hxx b/NxWidgets/libnxwidgets/include/ccallback.hxx
index 8d3c13cd2..714ed1a7f 100644
--- a/NxWidgets/libnxwidgets/include/ccallback.hxx
+++ b/NxWidgets/libnxwidgets/include/ccallback.hxx
@@ -39,7 +39,7 @@
 /****************************************************************************
  * Included Files
  ****************************************************************************/
- 
+
 #include <nuttx/config.h>
 
 #include <sys/types.h>
diff --git a/NxWidgets/nxwm/Makefile b/NxWidgets/nxwm/Makefile
index b0b33c73d..01b8d4513 100644
--- a/NxWidgets/nxwm/Makefile
+++ b/NxWidgets/nxwm/Makefile
@@ -51,6 +51,10 @@ ifeq ($(CONFIG_NXWM_TOUCHSCREEN),y)
 CXXSRCS += ccalibration.cxx ctouchscreen.cxx
 endif
 
+ifeq ($(CONFIG_NXWM_KEYBOARD),y)
+CXXSRCS += ckeyboard.cxx
+endif
+
 # Images
 CXXSRCS += glyph_calibration.cxx glyph_cmd.cxx glyph_minimize.cxx glyph_nsh.cxx
 CXXSRCS += glyph_play.cxx glyph_start.cxx glyph_stop.cxx
diff --git a/NxWidgets/nxwm/doc/NxWM-ThreadingModel.ppt b/NxWidgets/nxwm/doc/NxWM-ThreadingModel.ppt
index acae788c2..1b7b43622 100644
--- a/NxWidgets/nxwm/doc/NxWM-ThreadingModel.ppt
+++ b/NxWidgets/nxwm/doc/NxWM-ThreadingModel.ppt
diff --git a/NxWidgets/nxwm/include/ckeyboard.hxx b/NxWidgets/nxwm/include/ckeyboard.hxx
new file mode 100644
index 000000000..8f16bd506
--- /dev/null
+++ b/NxWidgets/nxwm/include/ckeyboard.hxx
@@ -0,0 +1,133 @@
+/****************************************************************************
+ * NxWidgets/nxwm/include/keyboard.hxx
+ *
+ *   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.
+ *
+ ****************************************************************************/
+ 
+#ifndef __INCLUDE_CKEYBOARD_HXX
+#define __INCLUDE_CKEYBOARD_HXX
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/nx/nxglib.h>
+
+#include <semaphore.h>
+#include <pthread.h>
+
+#include <nuttx/input/touchscreen.h>
+
+#include "cnxserver.hxx"
+#include "ccalibration.hxx"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Implementation Classes
+ ****************************************************************************/
+
+namespace NxWM
+{
+  /**
+   * The CKeyboard class provides the the calibration window and obtains
+   * callibration data.
+   */
+
+  class CKeyboard
+  {
+  private:
+    /**
+     * The state of the listener thread.
+     */
+
+    enum EListenerState
+    {
+      LISTENER_NOTRUNNING = 0,  /**< The listener thread has not yet been started */
+      LISTENER_STARTED,         /**< The listener thread has been started, but is not yet running */
+      LISTENER_RUNNING,         /**< The listener thread is running normally */
+      LISTENER_STOPREQUESTED,   /**< The listener thread has been requested to stop */
+      LISTENER_TERMINATED,      /**< The listener thread terminated normally */
+      LISTENER_FAILED           /**< The listener thread terminated abnormally */
+    };
+
+    /**
+     * CKeyboard state data
+     */
+
+    NXWidgets::CNxServer        *m_server;  /**< The current NX server */
+    int                          m_kbdFd;   /**< File descriptor of the opened keyboard device */
+    pthread_t                    m_thread;  /**< The listener thread ID */
+    volatile enum EListenerState m_state;   /**< The state of the listener thread */
+    sem_t                        m_waitSem; /**< Used to synchronize with the listener thread */
+
+    /**
+     * The keyboard listener thread.  This is the entry point of a thread that
+     * listeners for and dispatches keyboard events to the NX server.
+     *
+     * @param arg.  The CKeyboard 'this' pointer cast to a void*.
+     * @return This function normally does not return but may return NULL on
+     *   error conditions.
+     */
+
+    static FAR void *listener(FAR void *arg);
+
+  public:
+
+    /**
+     * CKeyboard Constructor
+     *
+     * @param server. An instance of the NX server.  This will be needed for
+     *   injecting mouse data.
+     */
+
+    CKeyboard(NXWidgets::CNxServer *server);
+
+    /**
+     * CKeyboard Destructor
+     */
+
+    ~CKeyboard(void);
+
+    /**
+     * Start the keyboard listener thread.
+     *
+     * @return True if the keyboard listener thread was correctly started.
+     */
+
+    bool start(void);
+  };
+}
+
+#endif // __INCLUDE_CKEYBOARD_HXX
diff --git a/NxWidgets/nxwm/include/ctaskbar.hxx b/NxWidgets/nxwm/include/ctaskbar.hxx
index 2578a3ce9..5aab9e6bf 100644
--- a/NxWidgets/nxwm/include/ctaskbar.hxx
+++ b/NxWidgets/nxwm/include/ctaskbar.hxx
@@ -184,7 +184,15 @@ namespace NxWM
      * @return true on success
      */
 
-    bool redrawTopWindow(void);
+    bool redrawTopApplication(void);
+
+    /**
+     * Raise the top window to the top of the NXheirarchy.
+     *
+     * @return true on success
+     */
+
+    void raiseTopApplication(void);
 
     /**
      * (Re-)draw the background window.
diff --git a/NxWidgets/nxwm/include/nxwmconfig.hxx b/NxWidgets/nxwm/include/nxwmconfig.hxx
index 25a8beb66..8a7700af4 100644
--- a/NxWidgets/nxwm/include/nxwmconfig.hxx
+++ b/NxWidgets/nxwm/include/nxwmconfig.hxx
@@ -65,6 +65,7 @@
  * CONFIG_NXWM_DEFAULT_FONTID - the NxWM default font ID. Default:
  *   NXFONT_DEFAULT
  * CONFIG_NXWM_TOUCHSCREEN - Define to build in touchscreen support.
+ * CONFIG_NXWM_KEYBOARD - Define to build in touchscreen support.
  */
 
 #ifndef CONFIG_HAVE_CXX
@@ -386,7 +387,7 @@
  *
  * CONFIG_NXWM_TOUCHSCREEN_DEVNO - Touchscreen device minor number, i.e., the
  *   N in /dev/inputN.  Default: 0
- * CONFIG_NXWM_TOUCHSCREEN_DEVNO - The full path to the touchscreen device.
+ * CONFIG_NXWM_TOUCHSCREEN_DEVPATH - The full path to the touchscreen device.
  *   Default: "/dev/input0"
  * CONFIG_NXWM_TOUCHSCREEN_SIGNO - The realtime signal used to wake up the
  *   touchscreen listener thread.  Default: 5
@@ -416,6 +417,42 @@
 #  define CONFIG_NXWM_TOUCHSCREEN_LISTENERSTACK 1024
 #endif
 
+/* Keyboard device **********************************************************/
+/**
+ * Keyboard device settings
+ *
+ * CONFIG_NXWM_KEYBOARD_DEVNO - The full path to the touchscreen device.
+ *   Default: "/dev/console"
+ * CONFIG_NXWM_KEYBOARD_SIGNO - The realtime signal used to wake up the
+ *   touchscreen listener thread.  Default: 6
+ * CONFIG_NXWM_KEYBOARD_BUFSIZE - The size of the keyboard read data buffer.
+ *   Default: 16
+ * CONFIG_NXWM_KEYBOARD_LISTENERPRIO - Priority of the touchscreen listener
+ *   thread.  Default: SCHED_PRIORITY_DEFAULT
+ * CONFIG_NXWM_KEYBOARD_LISTENERSTACK - Keyboard listener thread stack
+ *   size.  Default 1024
+ */
+
+#ifndef CONFIG_NXWM_KEYBOARD_DEVPATH
+#  define CONFIG_NXWM_KEYBOARD_DEVPATH "/dev/console"
+#endif
+
+#ifndef CONFIG_NXWM_KEYBOARD_SIGNO
+#  define CONFIG_NXWM_KEYBOARD_SIGNO 6
+#endif
+
+#ifndef CONFIG_NXWM_KEYBOARD_BUFSIZE
+#  define CONFIG_NXWM_KEYBOARD_BUFSIZE 6
+#endif
+
+#ifndef CONFIG_NXWM_KEYBOARD_LISTENERPRIO
+#  define CONFIG_NXWM_KEYBOARD_LISTENERPRIO SCHED_PRIORITY_DEFAULT
+#endif
+
+#ifndef CONFIG_NXWM_KEYBOARD_LISTENERSTACK
+#  define CONFIG_NXWM_KEYBOARD_LISTENERSTACK 1024
+#endif
+
 /* Calibration display ******************************************************/
 /**
  * Calibration display settings:
diff --git a/NxWidgets/nxwm/src/ckeyboard.cxx b/NxWidgets/nxwm/src/ckeyboard.cxx
new file mode 100644
index 000000000..6e9d7b818
--- /dev/null
+++ b/NxWidgets/nxwm/src/ckeyboard.cxx
@@ -0,0 +1,245 @@
+/********************************************************************************************
+ * NxWidgets/nxwm/src/ckeyboard.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> // REMOVE ME
+#define CONFIG_DEBUG 1 // REMOVE ME
+#define CONFIG_DEBUG_VERBOSE 1 // REMOVE ME
+#define CONFIG_DEBUG_GRAPHICS 1 // REMOVE ME
+#include <debug.h> // REMOVE ME
+
+#include <nuttx/config.h>
+
+#include <cunistd>
+#include <cerrno>
+#include <cfcntl>
+
+#include <sched.h>
+#include <pthread.h>
+#include <assert.h>
+#include <debug.h>
+
+#include "nxwmconfig.hxx"
+#include "ckeyboard.hxx"
+
+/********************************************************************************************
+ * Pre-Processor Definitions
+ ********************************************************************************************/
+
+/********************************************************************************************
+ * CKeyboard Method Implementations
+ ********************************************************************************************/
+
+using namespace NxWM;
+
+/**
+ * CKeyboard Constructor
+ *
+ * @param server. An instance of the NX server.  This will be needed for
+ *   injecting mouse data.
+ */
+
+CKeyboard::CKeyboard(NXWidgets::CNxServer *server)
+{
+  m_server      = server;              // Save the NX server
+  m_kbdFd     = -1;                    // Device driver is not opened
+  m_state       = LISTENER_NOTRUNNING; // The listener thread is not running yet
+
+  // Initialize the semaphore used to synchronize with the listener thread
+
+  sem_init(&m_waitSem, 0, 0);
+}
+
+/**
+ * CKeyboard Destructor
+ */
+
+CKeyboard::~CKeyboard(void)
+{
+  // Stop the listener thread
+
+  m_state = LISTENER_STOPREQUESTED;
+
+  // Wake up the listener thread so that it will use our buffer
+  // to receive data
+  // REVISIT:  Need wait here for the listener thread to terminate
+
+  (void)pthread_kill(m_thread, CONFIG_NXWM_KEYBOARD_SIGNO);
+
+  // Close the keyboard device (or should these be done when the thread exits?)
+
+  if (m_kbdFd >= 0)
+    {
+      std::close(m_kbdFd);
+    }
+}
+
+/**
+ * Start the keyboard listener thread.
+ *
+ * @return True if the keyboard listener thread was correctly started.
+ */
+
+bool CKeyboard::start(void)
+{
+  pthread_attr_t attr;
+
+  gvdbg("Starting listener\n");
+
+  // Start a separate thread to listen for keyboard events
+
+  (void)pthread_attr_init(&attr);
+
+  struct sched_param param;
+  param.sched_priority = CONFIG_NXWM_KEYBOARD_LISTENERPRIO;
+  (void)pthread_attr_setschedparam(&attr, &param);
+
+  (void)pthread_attr_setstacksize(&attr, CONFIG_NXWM_KEYBOARD_LISTENERSTACK);
+
+  m_state  = LISTENER_STARTED; // The listener thread has been started, but is not yet running
+
+  int ret = pthread_create(&m_thread, &attr, listener, (FAR void *)this);
+  if (ret != 0)
+    {
+      gdbg("CKeyboard::start: pthread_create failed: %d\n", ret);
+      return false;
+    }
+
+  // Detach from the thread
+
+  (void)pthread_detach(m_thread);
+
+  // Don't return until we are sure that the listener thread is running
+  // (or until it reports an error).
+
+  while (m_state == LISTENER_STARTED)
+    {
+      // Wait for the listener thread to wake us up when we really
+      // are connected.
+
+      (void)sem_wait(&m_waitSem);
+    }
+
+  // Then return true only if the listener thread reported successful
+  // initialization.
+
+  gvdbg("Listener m_state=%d\n", (int)m_state);
+  return m_state == LISTENER_RUNNING;
+}
+
+ /**
+ * The keyboard listener thread.  This is the entry point of a thread that
+ * listeners for and dispatches keyboard events to the NX server.
+ *
+ * @param arg.  The CKeyboard 'this' pointer cast to a void*.
+ * @return This function normally does not return but may return NULL on
+ *   error conditions.
+ */
+
+FAR void *CKeyboard::listener(FAR void *arg)
+{
+  CKeyboard *This = (CKeyboard *)arg;
+
+  gvdbg("Listener started\n");
+
+  // Open the keyboard device
+
+  This->m_kbdFd = std::open(CONFIG_NXWM_KEYBOARD_DEVPATH, O_RDONLY);
+  if (This->m_kbdFd < 0)
+    {
+      gdbg("ERROR Failed to open %s for reading: %d\n",
+           CONFIG_NXWM_KEYBOARD_DEVPATH, errno);
+      This->m_state = LISTENER_FAILED;
+      sem_post(&This->m_waitSem);
+      return (FAR void *)0;
+    }
+
+  // Indicate that we have successfully initialized
+
+  This->m_state = LISTENER_RUNNING;
+  sem_post(&This->m_waitSem);
+
+  // Now loop, reading and dispatching keyboard data
+
+  while (This->m_state == LISTENER_RUNNING)
+    {
+      // Read one keyboard sample
+
+      gvdbg("Listening for keyboard input\n");
+
+      uint8_t rxbuffer[CONFIG_NXWM_KEYBOARD_BUFSIZE];
+      ssize_t nbytes = read(This->m_kbdFd, rxbuffer, CONFIG_NXWM_KEYBOARD_BUFSIZE);
+dbg("nbytes=%d\n"); // REMOVE ME
+      // Check for errors
+
+      if (nbytes < 0)
+        {
+          // The only expect error is to be interrupt by a signal
+#ifdef CONFIG_DEBUG
+          int errval = errno;
+
+          gdbg("ERROR: read %s failed: %d\n", CONFIG_NXWM_KEYBOARD_DEVPATH, errval);
+          DEBUGASSERT(errval == EINTR);
+#endif
+        }
+
+      // Give the keyboard input to NX
+
+      else if (nbytes > 0)
+        {
+          // Looks like good keyboard input... process it.
+          // First, get the server handle
+
+          NXHANDLE handle = This->m_server->getServer();
+
+          // Then inject the keyboard input into NX
+
+          int ret = nx_kbdin(handle, (uint8_t)nbytes, rxbuffer);
+          if (ret < 0)
+            {
+              gdbg("ERROR: nx_kbdin failed\n");
+            }
+        }
+    }
+
+  // We should get here only if we were asked to terminate via
+  // m_state = LISTENER_STOPREQUESTED
+
+  gvdbg("Listener exiting\n");
+  This->m_state = LISTENER_TERMINATED;
+  return (FAR void *)0;
+}
diff --git a/NxWidgets/nxwm/src/ctaskbar.cxx b/NxWidgets/nxwm/src/ctaskbar.cxx
index 2130293c2..111d800e9 100644
--- a/NxWidgets/nxwm/src/ctaskbar.cxx
+++ b/NxWidgets/nxwm/src/ctaskbar.cxx
@@ -610,7 +610,7 @@ bool CTaskbar::minimizeApplication(IApplication *app)
 
       // Re-draw the new top, non-minimized application
 
-      return redrawTopWindow();
+      return redrawTopApplication();
     }
 
   return false;
@@ -672,7 +672,7 @@ bool CTaskbar::stopApplication(IApplication *app)
 
   // Re-draw the new top, non-minimized application
 
-  bool ret = redrawTopWindow();
+  bool ret = redrawTopApplication();
   if (ret)
     {
       // And redraw the task bar (without the icon for this task)
@@ -1184,6 +1184,11 @@ bool CTaskbar::redrawTaskbarWindow(void)
             }
 #endif
         }
+
+      // If there is a top application then we must now raise it above the task
+      // bar so that itwill get the keyboard input.
+
+      raiseTopApplication();
     }
 
   // Return success (it is not a failure if the window manager is not started
@@ -1198,7 +1203,7 @@ bool CTaskbar::redrawTaskbarWindow(void)
  * @return true on success
  */
 
-bool CTaskbar::redrawTopWindow(void)
+bool CTaskbar::redrawTopApplication(void)
 {
   // Check if there is already a top application
 
@@ -1237,6 +1242,30 @@ bool CTaskbar::redrawTopWindow(void)
 }
 
 /**
+ * Raise the top window to the top of the NXheirarchy.
+ *
+ * @return true on success
+ */
+
+void CTaskbar::raiseTopApplication(void)
+{
+  if (m_topApp)
+    {
+      // Every application provides a method to obtain its application window
+
+      IApplicationWindow *appWindow = m_topApp->getWindow();
+
+      // Each application window provides a method to get the underlying NX window
+
+      NXWidgets::INxWindow *window = appWindow->getWindow();
+
+      // Raise the application window to the top of the hierarchy
+
+      window->raise();
+    }
+}
+
+/**
  * (Re-)draw the background window.
  *
  * @return true on success
@@ -1301,17 +1330,13 @@ bool CTaskbar::redrawApplicationWindow(IApplication *app)
 
   m_backImage->disableDrawing();
 
-  // Every application provides a method to obtain its application window
+  // Raise to top application to the top of the NX window heirarchy
 
-  IApplicationWindow *appWindow = app->getWindow();
-
-  // Each application window provides a method to get the underlying NX window
-
-  NXWidgets::INxWindow *window = appWindow->getWindow();
+  raiseTopApplication();
 
-  // Raise the application window to the top of the hierarchy
+  // Every application provides a method to obtain its application window
 
-  window->raise();
+  IApplicationWindow *appWindow = app->getWindow();
 
   // Re-draw the application window toolbar
 
@@ -1333,7 +1358,7 @@ bool CTaskbar::redrawApplicationWindow(IApplication *app)
 void CTaskbar::hideApplicationWindow(IApplication *app)
 {
   // The hidden window is certainly not the top application any longer
-  // If it was before then redrawTopWindow() will pick a new one (rather
+  // If it was before then redrawTopApplication() will pick a new one (rather
   // arbitrarily).
 
   if (app->isTopApplication())