Gestures() tracking rotate+4 swipe
I am using the Gestures library from mikaelho (github)
I am trying to get the gesture recogizer to work to simulate turning a dial, but i can't seem to figure out how.
You can see my attempts including commented:
def tempo_knob(gest_data): #print(dir(gest_data)) print(gest_data.recognizer) #print(gest_data.rotation) print('yeeep') # [Gestures.UP, Gestures.DOWN, Gestures.LEFT, Gestures.RIGHT] Gestures().add_swipe(knob1, tempo_knob, ) g = Gestures() #g.recognize_simultaneously = lambda gr, other_gr: gr == Gestures.SWIPE and other_gr == Gestures.ROTATE #g.add_swipe(knob1, tempo_knob, [Gestures.UP, Gestures.DOWN, Gestures.LEFT, Gestures.RIGHT])
Can anyone help how I may:
Capture both swiping in any direction (and knowing what direction it was swiped), as well as rotating.
I was able to get rotation when it was only g.add_rotate()
Any help would be greatly appreciated
are you thinking of a two finger gesture? standard rotate is a two finger gesture.
for a circular knob, I think you just want regular drag type gesture, where you record the delta-angle (relative to center of knob), and add that to the current rotation value.
Plese find below a very straight-forward translation of my understanding of what you are after.
#coding: utf-8 from ui import * from gestures import * v = View(background_color='white') v.present('sheet') b = Label(background_color='grey', text_color='white', alignment= ALIGN_CENTER, center=(v.center, v.bounds/2-v.y)) v.add_subview(b) current_rotation = 0 def rotation_handler(data): global current_rotation if data.state == Gestures.CHANGED: b.transform = Transform.rotation(current_rotation + data.rotation) if data.state == Gestures.ENDED: current_rotation += data.rotation def swipe_handler_up(data): b.text = 'UP' def swipe_handler_right(data): b.text = 'RIGHT' g = Gestures() g.add_rotation(v, rotation_handler) g.add_swipe(v, swipe_handler_up, Gestures.UP) g.add_swipe(v, swipe_handler_right, Gestures.RIGHT) # Etc. for down, left
You are definitely right about the standard drag gesture, in the app I am making I wanted to make it optional with that I am fully aware of the rotation gesture being two fingers.
I am helping a friend if mine learn Python, and with that Pythonista.
He decided to take on a difficult project for a beginner - a metronome, that being said the drag is easier to deal with as an end user but then an accidental touch may cause an unwanted change in tempo, for instance.
I am setting up the more advanced ui elements for him as he isn't ready for it yet, and using it as an excuse to learn gestures in general, never had a need before.
Yes that is exactly what I was looking for! Thank you!
I assume if I wanted to implement the suggestion from @JonB - which I do now, I assume I would use the pan gesture? I am assuming this since I am able to read the velocity and calculate the direction, at least I think based on the data it reports.
Ill try to work it out on my own either way but if I am on the wrong track it may save me some time :)
Thank you again, this example REALLY helps clarify your lib.
@reticulated, yes, pan is your friend for dragging things.