Source Code for Module library.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  # Copyright (C) 2011 goffi <goffi@goffi.org> 
  6  # 
  7  # Licensed under the LGPL 2.1 
  8  # 
  9  # TODO: textarea autocomplete 
 10  # http://gwt.components.googlepages.com/auto-completiontextbox 
 11   
 12  from pyjamas.ui.TextBox import TextBox 
 13  from pyjamas import Factory 
 14  from pyjamas.ui.PopupPanel import PopupPanel 
 15  from pyjamas.ui.ListBox import ListBox 
 16  from pyjamas.ui import KeyboardListener 
 17  from pyjamas.ui.RootPanel import RootPanel 
 18   
 19 -class AutoCompleteTextBox(TextBox): 
 20 -    def __init__(self, **kwargs): 
 21          self.choicesPopup = PopupPanel(True, False) 
 22          self.choices = ListBox() 
 23          self.items = SimpleAutoCompletionItems() 
 24          self.popupAdded = False 
 25          self.visible = False 
 26   
 27          self.choices.addClickListener(self) 
 28          self.choices.addChangeListener(self) 
 29   
 30          self.choicesPopup.add(self.choices) 
 31          self.choicesPopup.addStyleName("AutoCompleteChoices") 
 32   
 33          self.choices.setStyleName("list") 
 34   
 35          if not kwargs.has_key('StyleName'): kwargs['StyleName']="gwt-AutoCompleteTextBox" 
 36   
 37          TextBox.__init__(self, **kwargs) 
 38          self.addKeyboardListener(self) 
 39   
 40 -    def setCompletionItems(self, items): 
 41          if not hasattr(items, 'getCompletionItems'): 
 42              items = SimpleAutoCompletionItems(items) 
 43   
 44          self.items = items 
 45   
 46 -    def getCompletionItems(self): 
 47          return self.items 
 48   
 49 -    def onKeyDown(self, arg0, arg1, arg2): 
 50          pass 
 51   
 52 -    def onKeyPress(self, arg0, arg1, arg2): 
 53          pass 
 54   
 55 -    def onKeyUp(self, arg0, arg1, arg2): 
 56          if arg1 == KeyboardListener.KEY_DOWN: 
 57              selectedIndex = self.choices.getSelectedIndex() 
 58              selectedIndex += 1 
 59              if selectedIndex >= self.choices.getItemCount(): 
 60                  selectedIndex = 0 
 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() - 1 
 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          self.visible = False 
126   
127  Factory.registerClass('pyjamas.ui.AutoComplete', 'AutoCompleteTextBox', AutoCompleteTextBox) 
128   
129   
130 -class SimpleAutoCompletionItems: 
131 -    def __init__(self, items = None): 
132          if items is None: 
133              items = [] 
134          self.completions = items 
135   
136 -    def getCompletionItems(self, match): 
137          matches = [] 
138          match = match.lower() 
139   
140          for i in range(len(self.completions)): 
141              lower = self.completions[i].lower() 
142              if lower.startswith(match): 
143                  matches.append(self.completions[i]) 
144   
145          return matches 
146