Fuze+: add a configurable deadzone area for touchpad buttons

To stop erroneous button presses, allow users to add a deadzone between
the button via the Settings > General > System menu > Touch Dead Zone.

The configuration was chosen this way: the touchpad has the same DPI
in both direction so the setting applies the same on both the X and Y
axis. The setting ranges from 0 to 100 and is internally multiplied by 2
giving a maximum deadzone of 2*100 = 200 around each button, which
account for 400 total (once around each button), effectively reducing
each virtual button from 1000x600 to 600x200 when using the maximum value.

Change-Id: I8683c63d2950200eb32d1dda0a00bbd92d83d5be
Reviewed-on: http://gerrit.rockbox.org/677
Reviewed-by: Benjamin Brown <foolshperson@gmail.com>
Tested: Benjamin Brown <foolshperson@gmail.com>
Reviewed-by: Amaury Pouly <amaury.pouly@gmail.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/apps/menus/settings_menu.c b/apps/menus/settings_menu.c
index 0d2a7febf1..130f5be1a2 100644
--- a/apps/menus/settings_menu.c
+++ b/apps/menus/settings_menu.c
@@ -317,6 +317,10 @@ MENUITEM_SETTING(buttonlight_brightness, &global_settings.buttonlight_brightness
 MENUITEM_SETTING(touchpad_sensitivity, &global_settings.touchpad_sensitivity, NULL);
 #endif
 
+#ifdef HAVE_TOUCHPAD_DEADZONE
+MENUITEM_SETTING(touchpad_deadzone, &global_settings.touchpad_deadzone, NULL);
+#endif
+
 #ifdef HAVE_QUICKSCREEN
 MENUITEM_SETTING(shortcuts_replaces_quickscreen, &global_settings.shortcuts_replaces_qs, NULL);
 #endif
@@ -363,6 +367,9 @@ MAKE_MENU(system_menu, ID2P(LANG_SYSTEM),
 #ifdef HAVE_TOUCHPAD_SENSITIVITY_SETTING
             &touchpad_sensitivity,
 #endif
+#ifdef HAVE_TOUCHPAD_DEADZONE
+            &touchpad_deadzone,
+#endif
 #ifdef USB_ENABLE_HID
             &usb_hid,
             &usb_keypad_mode,