Forum Archive

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()

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

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

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

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()