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

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    Pure Python gestures

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    • 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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