useDPadAsExtraButtons introduced

frontend/device/generic/device.lua

@@ -44,6 +44,7 @@ local Device = {
     hasPageUpDownKeys = no,
     canKeyRepeat = no,
     hasDPad = no,
+    useDPadAsExtraButtons = no,
     hasExitOptions = yes,
     hasFewKeys = no,
     hasWifiToggle = yes,
@@ -232,6 +233,10 @@ function Device:init()
         end
     end
 
+    if not Device:hasKeyboard() and Device:hasDPad() and Device:hasPageUpDownKeys() then
+        self.useDpadAsExtraButtons = yes
+    end
+
     if self:hasGSensor() then
         -- Setup our standard gyro event handler (EV_MSC:MSC_GYRO)
         if G_reader_settings:nilOrFalse("input_ignore_gsensor") then