Pure Python gestures
Python gesture implementation on Github for those situations where you cannot or do not want to use the ObjC gestures.
Simple usage example:
import pygestures class MyTouchableView(pygestures.GestureView): def on_swipe(self, data): if data.direction in (data.UP, data.DOWN): print('I was swiped vertically')
Run the file as-is to play around with the gestures. (Green circles track your touches, crosshairs show the centroid, red circle reflects pan, pinch and rotation.)
In your subclass, implement any or all the methods below to handle gestures. All methods get an information object with attributes including:
state- one of BEGAN, CHANGED, ENDED
location- location of the touch, or the centroid of all touches, as a scene.Point
no_of_touches- use this if you want to filter for e.g. only taps with 2 fingers
on_swipe- data includes
direction, one of UP, DOWN, LEFT, RIGHT
on_pan- data includes
translation, the distance from the start of the gesture, as a scene.Point. For most purposes this is better than
location, as it does not jump around if you add more fingers.
on_pinch- data includes
on_rotate- data includes
rotationin degrees, negative for counterclockwise rotation
There are also
prev_rotation, if you need them.
If it is more convenient to you, you can inherit GestureMixin together with ui.View or some other custom view class. In that case, if you want to use e.g. rotate, you need to make sure you have set
multitouch_enabled = True.
@mikael thanks, that works. I just change the cell‘s background color to lightgrey for visual feedback
@stephen True, I corrected it :) The code was a bit rushed 🤷♂️
@Drizzel, here’s a version that supports both the doubletap and regular row selection.
import ui import gestures def double_tap(data): print('double tapped row', data.view.row) def tableview_cell_for_row(tableview, section, row): data = tableview.data_source.items[row] cell = ui.TableViewCell('subtitle') cell.text_label.text = data cell.row = row doubler = gestures.doubletap(cell, double_tap) doubler.recognizer.delaysTouchesBegan = True return cell class Delegate(): def tableview_did_select(self, tableview, section, row): print('selected row', row) tv = ui.TableView() tv.delegate = Delegate() tv.data_source = ui.ListDataSource([str(x) for x in range(5)]) tv.data_source.delete_enabled = False tv.data_source.tableview_cell_for_row = tableview_cell_for_row tv.present('fullscreen')
hi, i found another bug, after i use 5 fingers to switch app and get back, multi-touch would be not working
@mikael Do you think it would be possible to use you gestures module on an objectiveC object?
I want to add gestures on a SceneView object, but functions like tap require their view parameter as an object having objc_instance property (see UIGestureRecognizerDelegate init).
@mikael I solved it with
def scene_view_tap(self,sender): location = self.recognizer.locationInView_(self.scene_view) node = self.scene_view.hitTest_options_(location,None) print(node) . . . self.gesture_recognizer_target = ui.Button() self.gesture_recognizer_target.action = self.scene_view_tap UITapGestureRecognizer = ObjCClass('UITapGestureRecognizer') self.recognizer = UITapGestureRecognizer.alloc().initWithTarget_action_(self.gesture_recognizer_target, sel('invokeAction:')).autorelease() scene_view.addGestureRecognizer_(self.recognizer) self.scene_view = scene_view
@cvp, forgot to advertise earlier that the latest version of gestures in the ui3 module accepts ObjC views in addition to ui module views.
from ui3.gestures import * tap(objc_view, handler)
@mikael thanks, I'll try
Édit: done, ok
Re-Edit: marvelous module