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

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    Pure Python gestures

    Pythonista
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    • stephen
      stephen @cvp last edited by stephen

      @cvp yes very much so in is what i posted. when i test i use alot of exlusive calls to insure control to eliminate inclusive bug or errors then when i achieve outcome expected i remove exclusive properties one at a time . just a metegation process i developed over the years. i should have mentioned this im sorry for the confusion. lol ☺️ the one your speaking of used to be connected to instance variables that i already removed lol kinda what i meant when i said sorry for the messy code lol

      also my goal was to creat a drag dampener. for example dragging an object from the bottom of the screen thats constrained to half screen size for travel. nd object speed slows as it aproaches max distance. similar to a vehicle comng to a stop at a trafic light..

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

        @stephen ok, understood. I'm really not a specialist of games or scene but I wonder if there are no functions for the physical aspect of the movements.
        Hoping other guys will help you. And sorry, I shouldn't have doubted 🙄

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

          @cvp

          there are animations and i beleive interpolation functions i could use and i, sure they work amazingly 🙃 but i dont learn much using premade. i like to try and understand whats going on even behind the scenes. then once i understand then ill use builtin "shortcuts". i guess i like to make things as dificult as possible lol at least thats what my ex-wife would say 😅😂😅

          thank you for checking it out tho its much appritiated. and just fyi the only diference from games and other types of programs is graphical programing mainly. and resource managment. i use scene module mainly for touch input controls and i like the way it implements the eventloop. i could just use my own loop and objc for touch input. but i am slowly replacing parts of scene with objc code cuz it has been improving performance.

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

            @stephen I can understand that. Due to my experience of (very) old guy using (very) old tools, I like to do all myself and I never have used Scene. I also prefer do animations my self in update method.
            Good luck and have fun...

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

              @stephen, the original request for ”pull to refresh” was covered earlier with one line of ”math”. What are you trying to achieve here? Spring force? Coulomb effect?

              If you like scene and like to play with forces, you could look at SpriteKit - but that would not be ”rolling your own”.

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

                @mikael its ok but yes i was trying to acheive a spring like constraint. but ill go ahead a put it to the side for now. thanks for the reply.

                1 Reply Last reply Reply Quote 0
                • Drizzel
                  Drizzel last edited by Drizzel

                  I‘m trying to double tap on a TableViewCell without actually selecting it, but it should still be selectable on a single tap. How would I go about doing this?

                  Let’s assume I have this code:

                  import ui
                  import gestures
                  
                  def double_tap(data):
                  	print('double tapped row', data.view.row)
                  def tap(data):
                  	print('tapped', data.view.row)
                  def long_press(data):
                  	print('long pressed', 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
                  	gestures.doubletap(cell, double_tap)
                  	#gestures.tap(cell, tap, number_of_touches_required = 1)
                  	#gestures.long_press(cell, long_press, minimum_press_duration = .2)
                  	
                  	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.frame = (tv.frame[0], tv.frame[1], 400, 400)
                  
                  tv.present(style = 'sheet')
                  
                  stephen mikael 3 Replies Last reply Reply Quote 0
                  • stephen
                    stephen @Drizzel last edited by stephen

                    @Drizzel said:

                    I‘m trying to double tap on a TableViewCell without actually selecting it, but it should still be selectable on a single tap. How would I go about doing this?

                    Let’s assume I have this code:

                    import ui
                    import gestures
                    
                    def double_tap(data):
                    	print('double tapped row', data.view.row)
                    def tap(data):
                    	print('tapped', data.view.row)
                    def long_press(data):
                    	print('long pressed', 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
                    	gestures.doubletap(cell, double_tap)
                    	#gestures.tap(cell, tap, number_of_touches_required = 1)
                    	#gestures.long_press(cell, long_press, minimum_press_duration = .2)
                    	
                    	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.frame = (tv.frame[0], tv.frame[1], 400, 400)
                    
                    tv.present(style = 'sheet')
                    

                    i believe you might wand def tableview_cell_for_row(tableview, section, row): as a method of class Delegate instead of a global function.

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

                      @Drizzel
                      im sure there is a much simpler way but...

                      why not have a state checker give x time to look for a second tap before executing functionality for a single tap? possibly a decorator?

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

                        @Drizzel, below works to separate the two gestures, but we lose the visual feedback for the tap selection, you would need to implement that yourself.

                        Better would be to find the built-in tap and give our doubletap preference over it, but I could not (yet...?) find it on the tableview, cell, content view, or the label.

                        import ui
                        import gestures
                        
                        def double_tap(data):
                            print('double tapped row', data.view.row)
                            
                        def tap(data):
                            print('tapped', data.view.row)
                            
                        def tableview_cell_for_row(tableview, section, row):
                            data = tableview.data_source.items[row]
                            cell = ui.TableViewCell('subtitle')
                            cell.selectable = False
                            cell.text_label.text = data
                            cell.row = row
                            doubler = gestures.doubletap(cell, double_tap)
                            tapper = gestures.tap(cell, tap)
                            doubler.before(tapper)
                            return cell
                            
                        class Delegate():
                            def tableview_did_select(self, tableview, section, row):
                                print('selected row', row)
                        
                        tv = ui.TableView(allows_selection=False)
                        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')
                        
                        1 Reply Last reply Reply Quote 3
                        • Drizzel
                          Drizzel last edited by

                          @mikael thanks, that works. I just change the cell‘s background color to lightgrey for visual feedback

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

                            @stephen True, I corrected it :) The code was a bit rushed 🤷‍♂️

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

                              awesome 😎🤓😊

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

                                @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')
                                
                                cvp 2 Replies Last reply Reply Quote 0
                                • Anxietier
                                  Anxietier last edited by

                                  hi, i found another bug, after i use 5 fingers to switch app and get back, multi-touch would be not working

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

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

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

                                        @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)
                                        
                                        cvp 1 Reply Last reply Reply Quote 2
                                        • cvp
                                          cvp @mikael last edited by cvp

                                          @mikael thanks, I'll try

                                          Édit: done, ok
                                          Re-Edit: marvelous module

                                          1 Reply Last reply Reply Quote 0
                                          • itibettravel
                                            itibettravel last edited by

                                            This post is deleted!
                                            1 Reply Last reply Reply Quote 0
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