Play and pause

[yas]

The pause button is not working

import ui

class view():
	def __init__(self):
		self.flag = True
		content = ui.TableViewCell()
		play = ui.Button(frame = (259,0,50,content.height))
		pause = ui.Button(frame = play.frame)
		
		play.image = ui.Image('iob:ios7_play_256')
		pause.image = ui.Image('iob:pause_256')
		pause.hidden = True
		play.action = self.Play
		pause.action = self.Pause
		label = ui.Label(frame =(0,0,0,content.height))
		label.touch_enabled = False
		
		label.background_color = 'blue'
		

		self.play = play
		self.pause = pause
		self.label = label
		self.flag = False
		content.content_view.add_subview(play)
		content.content_view.add_subview(pause)
		content.content_view.add_subview(label)
		self.content = content
	def table(self):
		return self.content
	
	@ui.in_background
	def Play(self,sender):
		sender.hidden = True
		self.pause.hidden = False
		import time
		for a in range(320):
			self.label.width = a
			time.sleep(0.1)
			if self.flag:
				self.flag = False
				return 
	
	@ui.in_background
	def Pause(self,sender):
		sender.hidden = True
		self.play.hidden = False
		self.flag = True
		
class Llist():
	def tableview_number_of_rows(self,t,s):
		return 40
	def tableview_cell_for_row(self,t,s,r):
		return view().table()
		
a=ui.TableView()
a.data_source = Llist()
a.allows_selection = False
a.present()

[mikael]

@yas, try using ui.delay instead of time.sleep.

[JonB]

the confusing thing about @ui.in_background is that it is not actually on its own background thread -- it is on a shared thread that runs the main script, and any other in_background calls.

Since both play and pause are in_background'd, pause does not run until play is done.

In your case, pause does not need to be in_background, since it is just setting a flag and returns immediately.

An alternative would be to either use a ui.delay inside zplay, or implement a custom decorator that kicks off a Thread. You could also use a custom view, and the update method to do some action repeatedly.

Here is a thread that covera many of these topics.
https://forum.omz-software.com/topic/2285/timer-with-ui/8

[mikael]

... or, once again, use Scripter to make these kinds of things really easy, with specific support for pausing animation.

[yas]

Thanks everyone,
@JonB You cleared my doubt on @ui.in_background, Now I'm using threading instead of ui.in_background

import ui,threading as thr

class view():
	def __init__(self):
		self.flag = True
		content = ui.TableViewCell()
		play = ui.Button(frame = (259,0,50,content.height))
		pause = ui.Button(frame = play.frame)
		
		play.image = ui.Image('iob:ios7_play_256')
		pause.image = ui.Image('iob:pause_256')
		pause.hidden = True
		play.action = self.Play
		pause.action = self.Pause
		label = ui.Label(frame =(0,0,0,content.height))
		label.touch_enabled = False
		
		label.background_color = 'blue'
		

		self.play = play
		self.pause = pause
		self.label = label
		self.flag = False
		content.content_view.add_subview(play)
		content.content_view.add_subview(pause)
		content.content_view.add_subview(label)
		self.content = content
	def table(self):
		return self.content
		
	def Play(self,sender):
		t = thr.Thread(target=self.Playy,args=(sender,))
		t.daemon = True
		t.start()
	def Pause(self,sender):
		t = thr.Thread(target=self.Pausee,args=(sender,))
		t.daemon = True
		t.start()
	def Playy(self,sender):
		sender.hidden = True
		self.pause.hidden = False
		import time
		for a in range(320):
			self.label.width = a
			time.sleep(0.1)
			if self.flag:
				self.flag = False
				return 
	

	def Pausee(self,sender):
		sender.hidden = True
		self.play.hidden = False
		self.flag = True
		
class Llist():
	def tableview_number_of_rows(self,t,s):
		return 40
	def tableview_cell_for_row(self,t,s,r):
		return view().table()
		
a=ui.TableView()
a.data_source = Llist()
a.allows_selection = False
a.present()