converting static widget tree to dynamic using python and .kv file -


i working on application want add n image frames in vertical boxlayout. number of n frames depend on desktop screen size. next frames filled dynamically images. able develop in static manner fixed number of frames. trying convert dynamic solution n frame widgets created depending on height of screen (in example below 7 widgets). , lost..... :(

the frames should 'sit' between top bar , bottom bar. in .kv file indicated # ilist: line.

i have following questions:

1) how add these widgets dynamically using .kv file?

2) how reference these individual frame widgets assigning images dynamically? example: frame[idx] = swid?

thanks time , shared knowledge in advance.

the python file pplay.py:

from kivy.app import app kivy.uix.widget import widget kivy.uix.boxlayout import boxlayout kivy.core.window import window kivy.properties import stringproperty  class ilistitem(widget):     sid = stringproperty('')     image = stringproperty('')     label = stringproperty('')     pass  class ilist(widget):     pass  class pplayhome(boxlayout):      def init_player(self):         global swid          self.ilayout = ilist()          idx in range (1, 7):             swid = ilistitem(                     sid = "s" + str(idx),                     image = 'empty_image.png',                     label = 'image' + str(idx)             )             self.ilayout.add_widget(swid)  class pplayapp(app):     def build(self):         window.clearcolor = (1,1,1,1)         window.borderless = true         window.size = 275, 1080         homewin = pplayhome()         homewin.init_player()         return homewin  if __name__ == "__main__":     pplayapp().run()

and kivy file pplay.kv

# file: pplay.kv  <ilist@boxlayout>     pid: self.pid     source: self.source     label: self.label     size_hint_y: none     height: "120dp"      boxlayout:         orientation: "vertical"         label:             size_hint: none, 1             text: root.label          image:             size_hint: none, 1             source: root.source  <pplayhome>:     orientation: "vertical"     actionbar:         font_size: 8         size: (275,25)         # background color in kivy acts tint , not solid color.         # set pure white background image first.         background_image: 'white-bg.png'         background_color: 0,.19,.34,1         actionview:             actionprevious:                 with_previous: false                 app_icon: 'trbutton.png'             actionoverflow:             actionbutton:                 icon: 'butt_exit.png'                 on_press: root.exit_player()  #    ilist:       boxlayout:         height: "10dp"         size_hint_y: none         pos_x: 0         canvas.before:             color:                 rgb: 0.55,0.77,0.25     # groen             rectangle:                 pos: self.pos                 size: self.size

you pretty close. here changed kv file, added colored rectangles illustration of sizes:

# file: pplay.kv  <ilistitem@widget>     source: ''     label: ''     size_hint_y: none     height: "120dp"     canvas.before:         color:             rgb: 0.55,0.77*self.idx/7,0.25     # groen         rectangle:             pos: self.pos             size: self.size     boxlayout:         orientation: "vertical"         size: root.size         pos: root.pos          label:             size_hint: none, 1             text: root.label             canvas.before:                 color:                     rgb: 0.77*root.idx/7,0.55,0.25     # groen                 rectangle:                     pos: self.pos                     size: self.size         image:             size_hint: none, 1             source: root.source  <pplayhome>:     orientation: "vertical"     actionbar:         font_size: 8         size: (275,25)         # background color in kivy acts tint , not solid color.         # set pure white background image first.         background_image: 'white-bg.png'         background_color: 0,.19,.34,1         actionview:             actionprevious:                 with_previous: false                 app_icon: 'trbutton.png'             actionoverflow:             actionbutton:                 icon: 'butt_exit.png'                 on_press: root.exit_player()      ilist:         id: ilist         orientation: 'vertical'     boxlayout:         height: "10dp"         size_hint_y: none         pos_x: 0         canvas.before:             color:                 rgb: 0.55,0.77,0.25     # groen             rectangle:                 pos: self.pos                 size: self.size

in pplay.py, essential part retrieve ilist widget using self.ids['ilist']. shows how children (the ilistitems) can retrieved via differentiating property.

from kivy.app import app kivy.uix.widget import widget kivy.uix.boxlayout import boxlayout kivy.core.window import window kivy.properties import stringproperty, numericproperty  class ilistitem(widget):     idx = numericproperty(1)     sid = stringproperty('')     image = stringproperty('')     label = stringproperty('')     pass  class ilist(boxlayout):     pass  class pplayhome(boxlayout):      def init_player(self):         #global swid          print self.ids         ilayout = self.ids['ilist']          idx in range (0, 7):             swid = ilistitem(                     sid = "s" + str(idx),                     image = 'empty_image.png',                     label = 'image' + str(idx),                     idx=idx             )             ilayout.add_widget(swid)         children_ids = [il.sid il in ilayout.children]         print children_ids         print ilayout.children[children_ids.index('s3')]  class pplayapp(app):     def build(self):         # window.clearcolor = (1,1,1,1)         window.borderless = true         window.size = 275, 1080         homewin = pplayhome()         homewin.init_player()         return homewin  if __name__ == "__main__":     pplayapp().run()

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