python - Kivy buttons not working as intended -


i've started making first kivy app few days ago , went fine till 1 point.

i have label has gridlayout inside , 256 buttons (palettecolorbutton) supposed represent palette. created on_touch_down method class , try click on of buttons, execute what's inside of on_touch_down.

here's important part of code:

class palettelabel(toolbarlabel):     def make_palette(self, layout):         in range(0, 256):             palette_color_button = palettecolorbutton()             palette_color_button.canvas:                 color(i/255, i/255, i/255, 1)             layout.add_widget(palette_color_button)   class palettecolorbutton(button):      def on_touch_down(self, touch):         if touch.is_double_tap:             print(self.pos)   class bameditor(app):     config.set('kivy', 'window_icon', r'.\static\program_icon\bameditor-icon.png')     def build(self):         main_label = mainlabel()         main_label.ids['palettelabel'].make_palette(main_label.ids['palettelayout'])         return main_label

and here's data .kv file:

<palettelabel>:     height: 160     width: 640   <palettecolorbutton>:     size:(20,20)     canvas.after:         rectangle:             pos: self.x + 1 , self.y + 1             size: self.width - 2, self.height - 2 <mainlabel>:     palettelabel:         id: palettelabel         pos: (self.parent.x + 120, self.parent.y + 20)          gridlayout:             id: palettelayout             cols: 32             rows: 8              pos: self.parent.x , self.parent.y             size: self.parent.width, self.parent.height

i want have clicked button's pos printed, instead positions of 256 buttons, know how achieve that? ofc, can use on_press instead , works, i'd buttons have different behavior when tapped once , different when tapped twice. thank help.

from kivy programming guide:

by default, touch events dispatched displayed widgets. means widgets receive touch event whether occurs within physical area or not.

[…]

in order provide maximum flexibility, kivy dispatches events widgets , lets them decide how react them. if want respond touch events inside widget, check:

def on_touch_down(self, touch):     if self.collide_point(*touch.pos):         # touch has occurred inside widgets area. stuff!         pass

https://kivy.org/docs/guide/inputs.html#touch-events

when don't want manage touch in button, (so when collision test fails), should let event dispatch rest of widget tree

    return super(widgetclass, self).on_touch_down(touch)

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