omz:forum

    • Register
    • Login
    • Search
    • Recent
    • Popular

    Welcome!

    This is the community forum for my apps Pythonista and Editorial.

    For individual support questions, you can also send an email. If you have a very short question or just want to say hello — I'm @olemoritz on Twitter.


    Pure Python gestures

    Pythonista
    8
    65
    21733
    Loading More Posts
    • Oldest to Newest
    • Newest to Oldest
    • Most Votes
    Reply
    • Reply as topic
    Log in to reply
    This topic has been deleted. Only users with topic management privileges can see it.
    • Anxietier
      Anxietier @mikael last edited by

      @mikael thank you
      and if i want to bind it with gestures, what should i do
      i mean is there any conflict between gestures and touch
      what i want to make is, i can use twin fingers to zoom and move picture(imageview or subclass zoompanview, later is better i guess), and when i move picture, move space and scale would be limited, as i leave my fingers, picture's edge should be forced move to superview's edge

      1 Reply Last reply Reply Quote 0
      • Anxietier
        Anxietier @mikael last edited by

        @mikael ah, dont bother
        i didnt read doc carefully(perhaps wrong word :P), now i can bind them together, thanks for ur help, ur codes are really amazing and helpful :D

        mikael stephen 2 Replies Last reply Reply Quote 0
        • mikael
          mikael @Anxietier last edited by

          @Anxietier, little optimization of the ”feel” and code simplification.

          import ui
          import scripter
          
          v = ui.View(background_color='black')
          
          class Pulled(ui.View):
              
              trigger_distance = 30
              pull_distance = 80
              
              def touch_moved(self, t):
                  delta_y = (
                      ui.convert_point(t.location, from_view=self).y - 
                      ui.convert_point(t.prev_location, from_view=self).y)
                  diff_fraction = self.y/self.pull_distance
                  try:
                      self.reveal_func(diff_fraction)
                  except AttributeError: pass
                  self.y += delta_y * (1 - min(0.9, diff_fraction) ** 2)
                  self.y = max(0, self.y)
                  
              def touch_ended(self, t):
                  scripter.y(self, 0, ease_func=scripter.ease_out)
                  try:
                      self.reveal_func(0)
                  except AttributeError: pass
                  if self.y > self.trigger_distance:
                      self.trigger_func()
          
          label = ui.Label(text='Release to refresh',
              text_color='white',
              flex='LBR',
              alpha=0,
          )
          label.size_to_fit()
          label.center = v.bounds.center()
          label.y = 8
          v.add_subview(label)
          
          def reveal(fraction):
              label.alpha = fraction
              
          def trigger():
              scripter.hide(label)
              print('refresh')
          
          v.add_subview(Pulled(
              reveal_func=reveal,
              trigger_func=trigger,
              frame=v.bounds,
              flex='WH',
              background_color='green'))
          
          v.present('fullscreen')
          
          Anxietier 1 Reply Last reply Reply Quote 1
          • stephen
            stephen @Anxietier last edited by stephen

            !!! Removed by poster to not confuse future readers with incorrect Code Examples.. 🤓😉

            Anxietier 1 Reply Last reply Reply Quote 0
            • Anxietier
              Anxietier @mikael last edited by

              @mikael
              thanks for help, i make it
              but there's another problem showed up:
              i make a main view, then i subclass zoomPanView and add to mainView , after that i add imageView as zoomPanView's subVIew, like what zoomPanDemo did, when i overwrite on_pan method and test it, data.began and data.changed can give me right value, but data.ended not, i dont know why

              Anxietier 1 Reply Last reply Reply Quote 0
              • Anxietier
                Anxietier @stephen last edited by

                @stephen thanks for help!
                im would try to understand ur code, im not good in math though :(
                btw, i tried mikael's code, and it works fine to me :P

                1 Reply Last reply Reply Quote 0
                • Anxietier
                  Anxietier @Anxietier last edited by

                  @Anxietier said:

                  @mikael
                  thanks for help, i make it
                  but there's another problem showed up:
                  i make a main view, then i subclass zoomPanView and add to mainView , after that i add imageView as zoomPanView's subVIew, like what zoomPanDemo did, when i overwrite on_pan method and test it, data.began and data.changed can give me right value, but data.ended not, i dont know why

                  one more thing, i overwrote on_pinch too, and i printed data.ended, and got right value, maybe two gesture's ended flag conflict ?

                  mikael Anxietier 2 Replies Last reply Reply Quote 0
                  • mikael
                    mikael @Anxietier last edited by

                    @Anxietier, thanks for catching this. Pan end event was not properly handled, fixed now in the version on the repo.

                    Anxietier 1 Reply Last reply Reply Quote 0
                    • Anxietier
                      Anxietier @Anxietier last edited by

                      @Anxietier said:

                      @Anxietier said:

                      @mikael
                      thanks for help, i make it
                      but there's another problem showed up:
                      i make a main view, then i subclass zoomPanView and add to mainView , after that i add imageView as zoomPanView's subVIew, like what zoomPanDemo did, when i overwrite on_pan method and test it, data.began and data.changed can give me right value, but data.ended not, i dont know why

                      one more thing, i overwrote on_pinch too, and i printed data.ended, and got right value, maybe two gesture's ended flag conflict ?

                      i resolved this issue
                      i subclass both view and GestureMixin as new ZoomPanView, then i overwrite touch_ended, so that when i subclass new ZoomPanView i can edit touch_ended,
                      high encapsulation not always convenient XD

                      1 Reply Last reply Reply Quote 0
                      • Anxietier
                        Anxietier @mikael last edited by

                        @mikael said:

                        @Anxietier, thanks for catching this. Pan end event was not properly handled, fixed now in the version on the repo.

                        expecting for new version (👍 ͡❛ ͜ʖ ͡❛)👍

                        mikael 1 Reply Last reply Reply Quote 0
                        • mikael
                          mikael @Anxietier last edited by

                          @Anxietier, is there a specific reason why you are using the Python version instead of the native iOS gestures? Just curious, because I no longer remember why I wrote pygestures. 😁 ... Probably just because I wanted to see if I could do it.

                          Anxietier 1 Reply Last reply Reply Quote 1
                          • Anxietier
                            Anxietier @mikael last edited by

                            @mikael
                            well, im not good at math, i tried use touch_began\move\ended, and surely i can make simple function, but as it became complex, my brain be in chaos, XD

                            mikael 1 Reply Last reply Reply Quote 0
                            • mikael
                              mikael @Anxietier last edited by

                              @Anxietier, I meant choosing between gestures.py (wrapper around iOS native gestures) and pygestures.py (pure Python gestures built on top of the ui.View.touch_x method ”primitives”.

                              Your answer leads me to guess you might not have been aware of the first option.

                              Anxietier 1 Reply Last reply Reply Quote 0
                              • Anxietier
                                Anxietier @mikael last edited by

                                @mikael oh, i did try gesture.py, got some problems, and you suggested me subclass ZoomPanView instead for my need, then i did and i find it's interesting, so ~~ :))

                                @mikael said:

                                @Anxietier, can you subclass ZoomPanView instead?

                                If you run pygestures.py and swipe from the right, you get the demo picture that you can pan and zoom, and that seems to work ok.

                                The code for it is at the end of the file.

                                mikael stephen 2 Replies Last reply Reply Quote 0
                                • mikael
                                  mikael @Anxietier last edited by

                                  @Anxietier, oh, and I thought you were already using the python version, given the title of this discussion thread... 😄

                                  Anxietier 1 Reply Last reply Reply Quote 1
                                  • stephen
                                    stephen @Anxietier last edited by

                                    @Anxietier

                                    do you still need help with drag/friction algorithm ?

                                    Anxietier 1 Reply Last reply Reply Quote 0
                                    • Anxietier
                                      Anxietier @stephen last edited by

                                      @stephen
                                      thank you, maybe not, i did solve this problem (probably not yet)
                                      thanks for your help :)

                                      stephen 1 Reply Last reply Reply Quote 0
                                      • Anxietier
                                        Anxietier @mikael last edited by

                                        @mikael
                                        haha, I was trying to make a zoom demo, but the effect is not good, so I googled key words "pythonista 2 finger zoom", then luckily found this XD

                                        1 Reply Last reply Reply Quote 0
                                        • stephen
                                          stephen @Anxietier last edited by

                                          @Anxietier

                                          Awesome!

                                          ok well il still working on it because parts of the process are in my todo fo mainproject. ill post finished codebwith coments here when finished

                                          Anxietier 1 Reply Last reply Reply Quote 0
                                          • Anxietier
                                            Anxietier @stephen last edited by

                                            @stephen
                                            good luck ! (っ^▿^)۶🍸🌟🍺٩(˘◡˘ )

                                            stephen 1 Reply Last reply Reply Quote 1
                                            • First post
                                              Last post
                                            Powered by NodeBB Forums | Contributors