util: tapinput

tapinput uses 'tapboard' to receive input and 'fakeinput'
to pass it to an X application.
So it makes an on-screen keyboard.

Signed-off-by: NeilBrown <neilb@suse.de>

diff --git a/utils/tapinput.png b/utils/tapinput.png
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Binary files /dev/null and b/utils/tapinput.png differ

diff --git a/utils/tapinput.py b/utils/tapinput.py
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+++ b/utils/tapinput.py
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+#!/usr/bin/env python
+
+# Copyright (C) 2011-2012 Neil Brown <neilb@suse.de>
+#
+#    This program is free software; you can redistribute it and/or modify
+#    it under the terms of the GNU General Public License as published by
+#    the Free Software Foundation; either version 2 of the License, or
+#    (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU General Public License for more details.
+#
+#    You should have received a copy of the GNU General Public License along
+#    with this program; if not, write to the Free Software Foundation, Inc.,
+#    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+
+# Connect 'tapboard' with 'fakeinput' to make a working on-screen
+# keyboard.
+# This script uses a long press on the 'power' button to raise
+# the keyboard, and also a double-tap on the 'z' axis of the
+# accelerometer.  However that requires a kernel driver that I
+# never published, so it won't work at the moment.
+
+import time, gtk
+from fakeinput import fakeinput
+from tapboard import TapBoard
+from evdev import EvDev
+import gobject
+
+class KeyboardIcon(gtk.StatusIcon):
+    def __init__(self, activate = None):
+        gtk.StatusIcon.__init__(self)
+        self.set_from_file('/usr/local/pixmaps/tapinput.png')
+        self.set_activate(activate)
+
+    def set_activate(self, activate):
+        if activate:
+            self.connect('activate', activate)
+
+power_timer = None
+def power_pressed(cnt, type, code, value, win):
+    if type != 1:
+        # not a key press
+        return
+    if code != 116:
+        # not the power key
+        return
+    global power_timer
+    if value != 1:
+        # not a down press
+        if power_timer != None:
+            gobject.source_remove(power_timer)
+            power_timer = None
+        return
+    power_timer = gobject.timeout_add(300, power_held, win)
+
+def power_held(win):
+    global power_timer
+    power_timer = None
+    if win.visible:
+        win.hide()
+        win.visible = False
+    else:
+        win.hide()
+        win.show()
+        win.activate()
+        win.visible = True
+    return False
+
+last_tap = 0
+def tap_pressed(cnt, type, code, value, win):
+    global last_tap
+    if type != 1:
+        # not a key press
+        return
+    if code != 309:
+        # not BtnZ
+        return
+    if value != 1:
+        # only want dow, not up
+        return
+    now = time.time()
+    print now, last_tap
+    if now - last_tap < 0.2:
+        # two taps
+        if win.visible:
+            win.hide()
+            win.visible = False
+        else:
+            win.hide()
+            win.show()
+            win.activate()
+            win.visible = True
+        last_tap = 0
+    else:
+        last_tap = now
+
+ico = KeyboardIcon()
+w = gtk.Window(type=gtk.WINDOW_POPUP)
+w.visible = True
+w.connect("destroy", lambda w: gtk.main_quit())
+ti = TapBoard()
+w.add(ti)
+w.set_default_size(ti.width, ti.height)
+root = gtk.gdk.get_default_root_window()
+(x,y,width,height,depth) = root.get_geometry()
+x = int((width - ti.width)/2)
+y = int((height - ti.height)/2)
+w.move(x,y)
+def activate(ignore):
+    w.hide()
+    w.show()
+    w.visible = True
+    w.activate()
+    w.move(x,y)
+ico.set_activate(activate)
+fi = fakeinput()
+def dokey(ti, str):
+    fi.send_char(str)
+ti.connect('key', dokey)
+def domove(ti, x,y):
+    global startx, starty
+    if x == 0 and y == 0:
+        (startx, starty) = w.get_position()
+    x = 0
+    w.move(startx+x, starty+y)
+
+ti.connect('move', domove)
+def hideme(ti):
+    w.hide()
+    w.visible = False
+ti.connect('hideme', hideme)
+try:
+    pbtn = EvDev("/dev/input/power", power_pressed, w)
+    tbtn = EvDev("/dev/input/accel", tap_pressed, w)
+except:
+    pass
+ti.show()
+w.show()
+fi.new_window()
+gtk.main()
+