.send_to_back()

[Phuket2]

I hope someone can shed some light on this issue for me. So if I have a valid reference to an ui element such as (ui.Button). So btn = ui.button(title='button1'). If I do btn.send_to_back() , it works as expected. But it seems when I have added btn as a sub_view() to another .View in a class, the send_to_back() method is ignored. I would have thought given I have the object reference, regardless where it lives in the z order, or View.sub_views(), it would work the same. The syntax does not fail, just no effect when btn added to a view using add_subview() . It's driving me crazy!
Btw, other attributes /methods working ok when accessed by obj.method/attribute

[JonB]

Those functions works to order components within a view. I.e, if you have a hierarchy like

Root
  +........viewA
   |       +---------button1
   |.      +---------button2
   |
   +-------viewB
           +--------button3

Then calling send to back on button1 changes z order within ViewA, but if you want to move ViewA behind ViewB, you'd have to call it on viewA

[Phuket2]

Thanks @JonB. I will look at it. Your diagram/explanation is the behaviour I expected. However, I am creating a lot of objects from dicts , **kwargs etc... Possible I went wrong. I was sure I was within the same subview. Maybe I wasn't. Thanks

[JonB]

I'll also point out that when you call add_subview, the added view gets added on top of everything else. So add things from back to front, and only use send_to_back when you need to change z order dynamically .

[Phuket2]

Yeah, @JonB, maybe I am missing something here. Just trying to create an enclosing class/View and then add the ui elements to the enclosing class. So all my subsequent attribute settings for ui GUI elements are relative to the enclosing class (view) for most part is working as expected, but the send_to_back() method does not seem to behave correctly. I am trying to rework my code in a simpler fashion, to be sure I am not doing the wrong thing. When I simplify my code I will post it. Again thanks

[JonB]

If your vie is not doing anything special, a regular old View works fine as a panel type class.

[Phuket2]

@JonB, yeah, I jumped the gun again. I can see now with a simple implementation it works (.send_to_back()) . Where it all went wrong for me I think is the mis-understanding of the coordinate system. (frame, bounds, left, right, x,y etc...) but my so called panel, is just a ui.View. Again thanks for your help.

import ui

class panel(ui.View):
	def __init__(self, parent_view):
		parent_view.add_subview(self)
		self.frame = parent_view.frame
		self.height = 100
		self.background_color = 'navy'
		self.panel_objects = []
	def add_button(self, title):
		btn = ui.Button(title=title)
		btn.x ,btn.y = 5,5
		btn.height , btn.width = 32,100
		btn.background_color = 'white'
		btn.action = self.send_to_back
	
		self.add_subview(btn)
		self.panel_objects.append(btn)
	
	def send_to_back(self, sender):
		sender.send_to_back()
	
if __name__ == '__main__':
	v = ui.View(name ='main', frame=(0,0,540,576))
	p = panel(v)
	p.add_button('ok')
	p.add_button('cancel')
	v.present('sheet')