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    Pure Python gestures

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    • 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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