allow EditFields to ignore specified keys

like "+" and "-", so you can use them as hotkeys in the parent view

docs/Lua API.rst

@@ -3986,6 +3986,9 @@ Attributes:
         widgets while it has focus. You can set this to ``true``, for example,
         if you don't want a ``List`` widget to react to arrow keys while the
         user is editing.
+:ignore_keys: If specified, must be a list of key names that the edit field
+              should ignore. This is useful if you have plain string characters
+              that you want to use as hotkeys (like ``+``).
 
 An ``EditField`` will only read and process text input if it has keyboard focus.
 It will automatically acquire keyboard focus when it is added as a subview to
@@ -4311,6 +4314,7 @@ supports:
 :edit_pen: If specified, used instead of ``cursor_pen`` for the edit field.
 :edit_below: If true, the edit field is placed below the list instead of above.
 :edit_key: If specified, the edit field is disabled until this key is pressed.
+:edit_ignore_keys: If specified, must be a list of key names that the filter edit field should ignore.
 :not_found_label: Specifies the text of the label shown when no items match the filter.
 
 The list choices may include the following attributes:

docs/changelog.txt

@@ -73,6 +73,8 @@ changelog.txt uses a syntax similar to RST, with a few special sequences:
 - ``tile-material``: fix the order of declarations. The ``GetTileMat`` function now returns the material as intended (always returned nil before). Also changed the license info, with permission of the original author.
 - ``widgets.EditField``: new ``onsubmit2`` callback attribute is called when the user hits Shift-Enter.
 - ``widgets.EditField``: new function: ``setCursor(position)`` sets the input cursor.
+- ``widgets.EditField``: new attribute: ``ignore_keys`` lets you ignore specified characters if you want to use them as hotkeys
+- ``widgets.FilteredList``: new attribute: ``edit_ignore_keys`` gets passed to the filter EditField as ``ignore_keys``
 - ``widgets.Label``: ``scroll`` function now interprets the keywords ``+page``, ``-page``, ``+halfpage``, and ``-halfpage`` in addition to simple positive and negative numbers.
 - ``widgets.HotkeyLabel``: clicking on the widget will now call ``on_activate()``.
 - ``widgets.CycleHotkeyLabel``: clicking on the widget will now cycle the options and trigger ``on_change()``. This also applies to the ``ToggleHotkeyLabel`` subclass.

library/lua/gui/widgets.lua

@@ -188,6 +188,7 @@ EditField.ATTRS{
     key = DEFAULT_NIL,
     key_sep = DEFAULT_NIL,
     modal = false,
+    ignore_keys = DEFAULT_NIL,
 }
 
 function EditField:preinit(init_table)
@@ -270,6 +271,12 @@ function EditField:onInput(keys)
         return self:inputToSubviews(keys)
     end
 
+    if self.ignore_keys then
+        for _,ignore_key in ipairs(self.ignore_keys) do
+            if keys[ignore_key] then return false end
+        end
+    end
+
     if self.key and keys.LEAVESCREEN then
         local old = self.text
         self:setText(self.saved_text)
@@ -1099,6 +1106,7 @@ FilteredList = defclass(FilteredList, Widget)
 FilteredList.ATTRS {
     edit_below = false,
     edit_key = DEFAULT_NIL,
+    edit_ignore_keys = DEFAULT_NIL,
 }
 
 function FilteredList:init(info)
@@ -1108,6 +1116,7 @@ function FilteredList:init(info)
         on_change = self:callback('onFilterChange'),
         on_char = self:callback('onFilterChar'),
         key = self.edit_key,
+        ignore_keys = self.edit_ignore_keys,
     }
     self.list = List{
         frame = { t = 2 },