Remember which button opened the modal

Panel
1

Hi,
I want to a panel app like this but I don’t found how to do the precise action I mentioned in my comment there :

import panel as pn

NUMBER_OF_ROWS = 8

rows = pn.Column()
ui = pn.template.VanillaTemplate()
apply_button = pn.widgets.Button(name='apply', button_type='success')
ui.modal.append(
    pn.Column(
    pn.widgets.IntInput(), 
    apply_button))

def close_modal(_):
    # I want that the action of closing the modal also put the value
    # of the IntInput inside the str pane that is at the left of the
    # button I clicked first to open the modal
    ui.close_modal()

apply_button.param.watch(close_modal, "value")

def button_callback(_):
    ui.open_modal()

for i in range(NUMBER_OF_ROWS):
    button = pn.widgets.Button(name="click me")
    rows.append(pn.Row(pn.pane.Str("default"), button))
    button.param.watch(button_callback, "value")

ui.main.append(rows)

ui.show()

I wanted the “click me” buttons to be all the same, so I can’t use the “name” attribute of the button to know which button I clicked. I also know I could do an easier app with just a lot of IntInputs but in my final app using the modal like this would be important because I have to include other widgets in this “control” modal.

2

What if you print event? There should be event.obj.name I think.

def close_modal(event):
    # I want that the action of closing the modal also put the value
    # of the IntInput inside the str pane that is at the left of the
    # button I clicked first to open the modal
    ui.close_modal()
3

Yes I can print the event.obj.name but since I want all my buttons to have the same name it doesn’t help me to know which one of them triggered the modal. Is it possible to add to my button a “home made” attribute ? I could use it to store an id shared by both button and str pane of the same row in order to find which str pane I should modify when I only know the triggered button.

4

I finally found a way !
I got it using a lambda function that introduces a new parameter. Here’s my code if it can help someone :
(I additionnally added various str panes and buttons per row because I want my final app to look like this)

import panel as pn

NUMBER_OF_ROWS = 8

rows = pn.Column()
ui = pn.template.VanillaTemplate()
apply_button = pn.widgets.Button(name='apply', button_type='success')
int_input = pn.widgets.IntInput()
ui.modal.append(pn.Column(int_input, apply_button))


def close_modal(_):
    ui.close_modal()

apply_button.param.watch(close_modal, "value")

def button_callback(index):
    print(index)
    ui.open_modal()

for i in range(NUMBER_OF_ROWS):
    button1 = pn.widgets.Button(name="click me")
    button2 = pn.widgets.Button(name="click me")
    button1.param.watch(lambda event, index=(i,1): button_callback(index), "clicks", onlychanged=True)
    button2.param.watch(lambda event, index=(i,2): button_callback(index), "clicks", onlychanged=True)
    rows.append(pn.Row(pn.pane.Str("default"), button1, pn.pane.Str("default"), button2))

ui.main.append(rows)

ui.show()