apps/graphics/twm4nx: Add option to use touschreen instead of mouse input.

graphics/twm4nx/Kconfig

@@ -81,7 +81,7 @@ config TWM4NX_NOKEYBOARD
 		environment (it is also used if VNC is selected)
 
 config TWM4NX_NOMOUSE
-	bool "Disable mouse"
+	bool "Disable mouse/touchscreen"
 	default n
 	---help---
 		Normally you would never disable mouse input.  That would make using
@@ -89,6 +89,24 @@ config TWM4NX_NOMOUSE
 		debugging Twm4Nx bringup in a simpler environment (it is also used
 		if VNC is selected)
 
+choice
+	prompt "Position device"
+	default TWM4NX_MOUSE
+	depends on !TWM4NX_NOMOUSE
+
+config TWM4NX_MOUSE
+	bool "Mouse"
+
+config TWM4NX_TOUCHSCREEN
+	bool "Touchscreen"
+
+endchoice # Position device
+
+config TWM4NX_MOUSE_DEVPATH
+	string "Path to input device"
+	default "/dev/mouse0" if TWM4NX_MOUSE
+	default "/dev/input0" if TWM4NX_TOUCHSCREEN
+
 config TWM4NX_DEBUG
 	bool "Force debug output"
 	default n

graphics/twm4nx/src/cinput.cxx

@@ -49,6 +49,11 @@
 #include <assert.h>
 
 #include <nuttx/nx/nxglib.h>
+#ifdef CONFIG_TWM4NX_MOUSE
+#  include <nuttx/input/mouse.h>
+#else
+#  include <nuttx/input/touchscreen.h>
+#endif
 
 #include "graphics/twm4nx/twm4nx_config.hxx"
 #include "graphics/twm4nx/ctwm4nx.hxx"
@@ -235,7 +240,7 @@ int CInput::keyboardOpen(void)
 }
 
 /**
- * Open the mouse input devices.  Not very interesting for the
+ * Open the mouse/touchscreen input devices.  Not very interesting for the
  * case of standard character device but much more interesting for
  * USB mouse devices that may disappear when disconnected but later
  * reappear when reconnected.  In this case, this function will
@@ -373,11 +378,12 @@ int CInput::keyboardInput(void)
 }
 
 /**
- * Read data from the mouse device, update the cursor position, and
- * inject the mouse data into NX for proper distribution.
+ * Read data from the mouse/touchscreen device.  if the input device is a
+ * mouse, then update the cursor position.  And, in either case, inject
+ * the mouse data into NX for proper distribution.
  *
- * @return On success, then method returns a valid file descriptor.  A
- *    negated errno value is returned if an irrecoverable error occurs.
+ * @return On success, then method returns zero (OK).  A negated errno
+ *   value is returned if an irrecoverable error occurs.
  */
 
 int CInput::mouseInput(void)

include/graphics/twm4nx/cinput.hxx

@@ -112,7 +112,7 @@ namespace Twm4Nx
       inline int keyboardOpen(void);
 
      /**
-       * Open the mouse input devices.  Not very interesting for the
+       * Open the mouse/touchscreen input device.  Not very interesting for the
        * case of standard character device but much more interesting for
        * USB mouse devices that may disappear when disconnected but later
        * reappear when reconnected.  In this case, this function will
@@ -138,11 +138,12 @@ namespace Twm4Nx
       inline int keyboardInput(void);
 
       /**
-       * Read data from the mouse device, update the cursor position, and
+       * Read data from the mouse/touchscreen device.  if the input device
+       * is a mouse, then update the cursor position.  And, in either case,
        * inject the mouse data into NX for proper distribution.
        *
-       * @return On success, then method returns a valid file descriptor.  A
-       *    negated errno value is returned if an irrecoverable error occurs.
+       * @return On success, then method returns zero (OK).  A negated errno
+       *   value is returned if an irrecoverable error occurs.
        */
 
       inline int mouseInput(void);

include/graphics/twm4nx/twm4nx_config.hxx

@@ -425,6 +425,8 @@
  * Mouse device settings
  *
  * CONFIG_TWM4NX_NOMOUSE - Can be used to disable mouse input.
+ * CONFIG_TWM4NX_MOUSE - Input is from a mouse.
+ * CONFIG_TWM4NX_TOUSCREEN - Input is from a touchscreen.
  * CONFIG_TWM4NX_MOUSE_DEVPATH - The full path to the mouse device.
  *   Default: "/dev/console"
  * CONFIG_TWM4NX_MOUSE_USBHOST - Indicates the the mouse is attached via
@@ -434,11 +436,19 @@
  */
 
 #ifndef CONFIG_TWM4NX_MOUSE_DEVPATH
-#  define CONFIG_TWM4NX_MOUSE_DEVPATH "/dev/mouse0"
+#  ifdef CONFIG_TWM4NX_MOUSE
+#    define CONFIG_TWM4NX_MOUSE_DEVPATH "/dev/mouse0"
+#  else
+#    define CONFIG_TWM4NX_MOUSE_DEVPATH "/dev/input0"
+#  endif
 #endif
 
 #ifndef CONFIG_TWM4NX_MOUSE_BUFSIZE
-#  define CONFIG_TWM4NX_MOUSE_BUFSIZE sizeof(struct mouse_report_s)
+#  ifdef CONFIG_TWM4NX_MOUSE
+#    define CONFIG_TWM4NX_MOUSE_BUFSIZE sizeof(struct mouse_report_s)
+#  else
+#    define CONFIG_TWM4NX_MOUSE_BUFSIZE sizeof(SIZEOF_TOUCH_SAMPLE_S(1))
+#  endif
 #endif
 
 // Keyboard device ///////////////////////////////////////////////////////////