Source Code for Module pyjamas.ui.AutoComplete

  1  # Autocomplete component for Pyjamas 
  2  # Ported by Willie Gollino from Autocomplete component for GWT - 
  3  # Originally by Oliver Albers http://gwt.components.googlepages.com/ 
  4  # Copyright (C) 2009 Luke Kenneth Casson Leighton <lkcl@lkcl.net> 
  5  # 
  6  # Licensed under the LGPL 2.1 
  7  # 
  8  # TODO: textarea autocomplete 
  9  # http://gwt.components.googlepages.com/auto-completiontextbox 
 10   
 11  from TextBox import TextBox 
 12  from pyjamas import Factory 
 13  from PopupPanel import PopupPanel 
 14  from ListBox import ListBox 
 15  from pyjamas.ui import KeyboardListener 
 16  from RootPanel import RootPanel 
 17   
 18 -class AutoCompleteTextBox(TextBox): 
 19 -    def __init__(self, **kwargs): 
 20          self.choicesPopup = PopupPanel(True, False) 
 21          self.choices = ListBox() 
 22          self.items = SimpleAutoCompletionItems() 
 23          self.popupAdded = False 
 24          self.visible = False 
 25   
 26          self.choices.addClickListener(self) 
 27          self.choices.addChangeListener(self) 
 28   
 29          self.choicesPopup.add(self.choices) 
 30          self.choicesPopup.addStyleName("AutoCompleteChoices") 
 31               
 32          self.choices.setStyleName("list") 
 33   
 34          if not kwargs.has_key('StyleName'): kwargs['StyleName']="gwt-AutoCompleteTextBox" 
 35   
 36          TextBox.__init__(self, **kwargs) 
 37          self.addKeyboardListener(self) 
 38   
 39 -    def setCompletionItems(self, items): 
 40          if not hasattr(items, 'getCompletionItems'): 
 41              items = SimpleAutoCompletionItems(items) 
 42           
 43          self.items = items 
 44   
 45 -    def getCompletionItems(self): 
 46          return self.items 
 47   
 48 -    def onKeyDown(self, arg0, arg1, arg2): 
 49          pass 
 50   
 51 -    def onKeyPress(self, arg0, arg1, arg2): 
 52          pass 
 53   
 54 -    def onKeyUp(self, arg0, arg1, arg2): 
 55          if arg1 == KeyboardListener.KEY_DOWN: 
 56              selectedIndex = self.choices.getSelectedIndex() 
 57              selectedIndex += 1 
 58              if selectedIndex > self.choices.getItemCount(): 
 59                  selectedIndex = 0 
 60           
 61              self.choices.setSelectedIndex(selectedIndex)            
 62              return 
 63   
 64          if arg1 == KeyboardListener.KEY_UP: 
 65              selectedIndex = self.choices.getSelectedIndex() 
 66              selectedIndex -= 1 
 67              if selectedIndex < 0: 
 68                  selectedIndex = self.choices.getItemCount() 
 69              self.choices.setSelectedIndex(selectedIndex) 
 70              return 
 71   
 72          if arg1 == KeyboardListener.KEY_ENTER: 
 73              if self.visible: 
 74                  self.complete()       
 75              return 
 76   
 77          if arg1 == KeyboardListener.KEY_ESCAPE: 
 78              self.choices.clear() 
 79              self.choicesPopup.hide() 
 80              self.visible = False 
 81              return 
 82   
 83          text = self.getText() 
 84          matches = [] 
 85          if len(text) > 0: 
 86              matches = self.items.getCompletionItems(text) 
 87   
 88          if len(matches) > 0: 
 89              self.choices.clear() 
 90   
 91              for i in range(len(matches)): 
 92                  self.choices.addItem(matches[i]) 
 93                   
 94              if len(matches) == 1 and matches[0] == text: 
 95                  self.choicesPopup.hide() 
 96              else: 
 97                  self.choices.setSelectedIndex(0) 
 98                  self.choices.setVisibleItemCount(len(matches) + 1) 
 99                       
100                  if not self.popupAdded: 
101                      RootPanel().add(self.choicesPopup) 
102                      self.popupAdded = True 
103   
104                  self.choicesPopup.show() 
105                  self.visible = True 
106                  self.choicesPopup.setPopupPosition(self.getAbsoluteLeft(), self.getAbsoluteTop() + self.getOffsetHeight()) 
107                  self.choices.setWidth("%dpx" % self.getOffsetWidth()) 
108          else: 
109              self.visible = False 
110              self.choicesPopup.hide() 
111   
112 -    def onChange(self, arg0): 
113          self.complete() 
114   
115 -    def onClick(self, arg0): 
116          self.complete() 
117   
118 -    def complete(self): 
119          if self.choices.getItemCount() > 0: 
120              self.setText(self.choices.getItemText(self.choices.getSelectedIndex())) 
121               
122          self.choices.clear() 
123          self.choicesPopup.hide() 
124          self.setFocus(True) 
125   
126  Factory.registerClass('pyjamas.ui.AutoCompleteTextBox', AutoCompleteTextBox) 
127   
128   
129 -class SimpleAutoCompletionItems: 
130 -    def __init__(self, items = None): 
131          if items is None: 
132              items = [] 
133          self.completions = items 
134   
135 -    def getCompletionItems(self, match): 
136          matches = [] 
137          match = match.lower() 
138           
139          for i in range(len(self.completions)): 
140              lower = self.completions[i].lower() 
141              if lower.startswith(match): 
142                  matches.append(self.completions[i]) 
143           
144          return matches 
145