enh: UiSettings.mnemonic_hidden

Author: e3rd

mininterface/_lib/showcase.py

@@ -5,6 +5,8 @@
 
 from tyro.conf import Positional
 
+from ..tag.select_tag import SelectTag
+
 from ..exceptions import ValidationFail
 from ..cli import Command, SubcommandPlaceholder
 from ..tag.secret_tag import SecretTag
@@ -85,6 +87,9 @@ class Env:
     my_choice: Annotated[str, Options("one", "two", "three")] = "two"
     """ Choose between values """
 
+    my_multiple: Annotated[str, SelectTag(options=("one", "two", "three"), multiple=True)] = "two"
+    """ Choose values """
+
 
 def showcase(case: int):
     kw = {"args": []}

mininterface/_mininterface/adaptor.py

@@ -48,7 +48,10 @@ def _determine_mnemonic(self, form: TagDict, also_nones=False):
         # Determine mnemonic
         used_mnemonic = set()
         to_be_determined: list[Tag] = []
-        for tag in flatten(form):
+        tags = list(flatten(form))
+        if len(tags) <= 1:  # do not use mnemonic for single field which is focused by default
+            return
+        for tag in tags:
             if tag.mnemonic is False:
                 continue
             if isinstance(tag.mnemonic, str):

mininterface/_tk_interface/select_input.py

@@ -59,6 +59,7 @@ def __init__(self, master, tag: SelectTag, grid_info, widget: Widget, adaptor: "
         self.options: OptionsReturnType = tag._get_options()
         self.variable = Variable()
         self.widget = widget
+        self.taking_focus = widget
 
         self.frame = nested_frame = Frame(master)
         nested_frame.grid(row=grid_info['row'], column=grid_info['column'], sticky='w')
@@ -92,6 +93,8 @@ def checkboxes(self, bg):
 
         vw = self.variable_wrapper
 
+        taken = False
+
         for i, (choice_label, choice_val, tip, tupled_key) in enumerate(options):
             var = BooleanVar(value=choice_val in tag.val)
 
@@ -113,6 +116,10 @@ def on_toggle(val=choice_val, var=var):
 
             button.pack(anchor="w")
 
+            if not taken:
+                taken = True
+                self.taking_focus = button  # NOTE should be better, to the first one
+
     def radio(self, bg):
         options = self.options
         tag = self.tag
@@ -128,6 +135,8 @@ def radio(self, bg):
                              value=choice_label,
                              style="Highlight.TRadiobutton" if tip else "",
                              takefocus=is_selected)
+            if is_selected:
+                self.taking_focus = rb
             if adaptor.settings.radio_select_on_focus:
                 rb.bind("<FocusIn>",
                         lambda _, var=self.variable, val=choice_label: self.select_on_focus(var, val),

mininterface/_tk_interface/utils.py

@@ -169,6 +169,7 @@ def prevent_submit(event):
         variable = field_form.variable
         master = widget.master
         widget.pack_forget()
+        taking_focus = widget
         process_change_handler = True
         """ If False, you process _last_ui_val and launch _on_change_trigger. """
         select_tag = False
@@ -193,6 +194,7 @@ def prevent_submit(event):
                 replace_variable(variable)
                 widget.grid_forget()
                 widget = wrapper.widget
+                taking_focus = wrapper.taking_focus
                 if tag.multiple:
                     process_change_handler = False
 
@@ -270,11 +272,16 @@ def inner(tag: Tag):
         underline = -1
         if char:
             try:
-                underline = label.index(char)
+                underline = label.lower().index(char)
             except ValueError:
                 label += f" ({char})"
-                underline = label.index(char)
-            adaptor.bind_shortcut(f'<Alt-{char}>', widget)
+                underline = label.lower().index(char)
+            # NOTE in case of a radio, put here
+            adaptor.bind_shortcut(f'<Alt-{char}>', taking_focus)
+
+            if adaptor.settings.mnemonic_hidden:
+                label = tag.label
+                underline = -1
 
         # Change label name as the field name might have changed (ex. highlighted by an asterisk)
         # But we cannot change the dict key itself

mininterface/settings.py

@@ -34,6 +34,9 @@ class UiSettings:
     * `None`: All Tags with `Tag(mnemonic=char|True)` will have a mnemonic enabled.
     """
 
+    mnemonic_hidden: bool = False
+    """ If True, the field label is not underlined to mark the mnemonic. """
+
 
 @dataclass
 class GuiSettings(UiSettings):