Add support for physical button for page crop (#6091)

See: #2003
In page crop:
physical press button = OK
physical back button = Cancel

frontend/apps/reader/modules/readercropping.lua

@@ -13,10 +13,11 @@ local RightContainer = require("ui/widget/container/rightcontainer")
 local UIManager = require("ui/uimanager")
 local VerticalGroup = require("ui/widget/verticalgroup")
 local Screen = require("device").screen
+local _ = require("gettext")
 
 local PageCropDialog = VerticalGroup:new{
-    ok_text = "OK",
-    cancel_text = "Cancel",
+    ok_text = _("OK"),
+    cancel_text = _("Cancel"),
     ok_callback = function() end,
     cancel_callback = function() end,
     button_width = math.floor(Screen:scaleBySize(70)),
@@ -73,7 +74,6 @@ function PageCropDialog:onShow()
     return true
 end
 
-
 local ReaderCropping = InputContainer:new{}
 
 function ReaderCropping:onPageCrop(mode)

frontend/ui/widget/bboxwidget.lua

@@ -49,6 +49,10 @@ function BBoxWidget:init()
             }
         }
     end
+    if Device:hasKeys() then
+        self.key_events.Close = { {"Back"}, doc = "close windows" }
+        self.key_events.Select = { {"Press"}, doc = "confirm adjust" }
+    end
 end
 
 function BBoxWidget:getSize()
@@ -222,4 +226,13 @@ function BBoxWidget:onConfirmAdjust(arg, ges)
     return true
 end
 
+function BBoxWidget:onClose()
+    self.ui:handleEvent(Event:new("CancelPageCrop"))
+end
+
+function BBoxWidget:onSelect()
+    self.ui:handleEvent(Event:new("ConfirmPageCrop"))
+end
+
+
 return BBoxWidget