Failing to create a combo box with kivy
Tatenda Mukandi
Elliot Garbus
Just to be clear, you want to combine a textInput with a dropdown.
The TextInput has a button next to it that will open the drop down, or the user can just type in the TextInput.
Is this correct?
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Elliot Garbus
I went ahead and created a ComboBox. There are a number of things you could do to make this more configurable, this this is a good start.
# Example Combo box
# combination of a drop-down list or list box and a single-line editable textbox,
# allowing the user to either type a value directly or select a value from the list.
from kivy.app import App
from kivy.lang import Builder
from kivy.uix.dropdown import DropDown
from kivy.uix.label import Label
from kivy.uix.behaviors import ButtonBehavior
from kivy.uix.relativelayout import RelativeLayout
from kivy.properties import ListProperty
kv = """
<ComboButton>:
size_hint_y: None
height: 30
color: 'black'
on_release: print(self.text)
canvas.before:
Color:
rgb: 1, 1, 1
Rectangle:
pos: self.pos
size: self.size
<ComboBox>:
values: [f'Value {i}' for i in range(10)]
BoxLayout:
id: box
size_hint_y: None
height: 30
TextInput:
id: ti
Button:
size_hint_x: None
width: 24
border: 0, 0, 0, 0
font_name: 'arial'
text: '\u02C5'
on_release: root.open_drop(box)
FloatLayout:
ComboBox:
pos_hint: {'center_x': 0.5, 'y': 0.5}
size_hint_x: None
width: 200
"""
class ComboButton(ButtonBehavior, Label):
pass
class ComboBox(RelativeLayout):
values = ListProperty()
def __init__(self, **kwargs):
super().__init__(**kwargs)
self.dropdown = DropDown() # Create the dropdown once and keep a reference to it
self.dropdown.bind(on_select=lambda instance, x: self.set_text(x))
def on_kv_post(self, base_widget):
for v in self.values:
cb = ComboButton(text=v)
cb.bind(on_release=lambda btn: self.dropdown.select(btn.text))
self.dropdown.add_widget(cb)
def set_text(self, v):
self.ids.ti.text = v
def open_drop(self, w):
self.dropdown.open(w)
class ComboBoxTestApp(App):
def build(self):
return Builder.load_string(kv)
ComboBoxTestApp().run()
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