Scrollview with double tap on lines, always returns the last item in the list no matter what. Can you guys help me figureout the issue?

[julc...@gmail.com]

Hi,

My app is essentially

App -> Screen Manager -> Screen1 -> ScrollView

                                         Screen2

                                          .

                                          .

                                          .

Currently prototyping in Ubuntu/python2 and latest kivy version

Every line in the scrollview is a MyLines instance where I catch  double tap on a line to trigger the following action.

No matter what line I double  tap, only the last item in the scroll list is selected. I just can't figure out why.

<MyLines>:
       
    orientation: "horizontal"
    size_hint_y : None
   
    Label:
        id : contenido
       
    Label:
        id : fcompra
   
    Label:
        id : caduca

    Image:
        id : thumbnail
        center_x: self.parent.center_x
        center_y: self.parent.center_y

Everytime an update is required ths function is triggered

    def load_grid(self,sel=None):
 
        g=self.ids.idgrid
        g.clear_widgets()
       
        for d in get_items(sel,self.consumido): #get_items list(dic())
            g.add_widget(MyLines(data=d))
        g.bind(minimum_height=g.setter('height'))

MyLines Class catchs the double tap to trigger a change of screen

    def on_touch_down(self,touch):
        if touch.is_double_tap:
            print(self.data)  # always print the last item in the scrollview list
           
        return True

[julc...@gmail.com]

BTW MyLines is a boxlayout

[Elliot Garbus]

Test if self.collide_point(*touch.pos) is True.  Each widget receives all of the  touch events.  In the touch event handler you need to see if this widget was touched with collide_point().

https://kivy.org/doc/stable/api-kivy.uix.widget.html?highlight=collision#kivy.uix.widget.Widget.collide_point

[julc...@gmail.com]

Thank you. Yes collide_point do3es the trick.

I was utterly confused because I have used several times in the past scrollview. But in the past, my scroll view was composed of buttons and I was testing for on_press or on_state.

Never before I had been using a scrollview composed of layouts with multiple widgets. Hence, the need for a complete different event checking.

Cheers.

JC

On Tuesday, 25 December 2018 09:06:58 UTC+1, julc...@gmail.com wrote: