Source Code for Module pyjamas.ui.TextBoxBase

  1  # Copyright 2006 James Tauber and contributors 
  2  # Copyright (C) 2009 Luke Kenneth Casson Leighton <lkcl@lkcl.net> 
  3  # 
  4  # Licensed under the Apache License, Version 2.0 (the "License"); 
  5  # you may not use this file except in compliance with the License. 
  6  # You may obtain a copy of the License at 
  7  # 
  8  #     http://www.apache.org/licenses/LICENSE-2.0 
  9  # 
 10  # Unless required by applicable law or agreed to in writing, software 
 11  # distributed under the License is distributed on an "AS IS" BASIS, 
 12  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
 13  # See the License for the specific language governing permissions and 
 14  # limitations under the License. 
 15  from pyjamas import DOM 
 16  from pyjamas import Factory 
 17  from __pyjamas__ import console, JS 
 18  from FocusWidget import FocusWidget 
 19  from pyjamas.ui import Event 
 20   
 21 -class TextBoxBase(FocusWidget): 
 22      ALIGN_CENTER = "center" 
 23      ALIGN_JUSTIFY = "justify" 
 24      ALIGN_LEFT = "left" 
 25      ALIGN_RIGHT = "right" 
 26   
 27 -    def __init__(self, element, **kwargs): 
 28          self.changeListeners = [] 
 29          self.currentEvent = None 
 30   
 31          FocusWidget.__init__(self, element, **kwargs) 
 32          self.sinkEvents(Event.ONCHANGE) 
 33   
 34 -    def addChangeListener(self, listener): 
 35          self.changeListeners.append(listener) 
 36   
 37 -    def cancelKey(self): 
 38          if self.currentEvent is not None: 
 39              DOM.eventPreventDefault(self.currentEvent) 
 40   
 41 -    def getCursorPos(self): 
 42          element = self.getElement() 
 43          try: 
 44              return element.selectionStart 
 45          except: 
 46              return 0 
 47   
 48 -    def getName(self): 
 49          return DOM.getAttribute(self.getElement(), "name") 
 50   
 51 -    def getSelectedText(self): 
 52          start = self.getCursorPos() 
 53          length = self.getSelectionLength() 
 54          text = self.getText() 
 55          return text[start:start + length] 
 56   
 57 -    def getSelectionLength(self): 
 58          element = self.getElement() 
 59          try: 
 60              return element.selectionEnd - element.selectionStart 
 61          except: 
 62              return 0 
 63   
 64      # have to override Focus here for TextBoxBase 
 65      # because FocusWidget (actually FocusMixin) assumes that 
 66      # CreateFocusable has been used to create the element. 
 67      # in "input box" type scenarios, it hasn't: it's created 
 68      # by TextBox class etc. 
 69 -    def setFocus(self, focused): 
 70          if (focused): 
 71              self.getElement().focus() 
 72          else: 
 73              self.getElement().blur() 
 74   
 75 -    def getText(self): 
 76          return DOM.getAttribute(self.getElement(), "value") 
 77   
 78 -    def onBrowserEvent(self, event): 
 79          FocusWidget.onBrowserEvent(self, event) 
 80   
 81          type = DOM.eventGetType(event) 
 82          if type == "change": 
 83              for listener in self.changeListeners: 
 84                  if hasattr(listener, 'onChange'): listener.onChange(self) 
 85                  else: listener(self) 
 86   
 87 -    def removeChangeListener(self, listener): 
 88          self.changeListeners.remove(listener) 
 89   
 90 -    def selectAll(self): 
 91          length = len(self.getText()) 
 92          if length > 0: 
 93              self.setSelectionRange(0, length) 
 94   
 95 -    def setCursorPos(self, pos): 
 96          self.setSelectionRange(pos, 0) 
 97   
 98 -    def setKey(self, key): 
 99          if self.currentEvent is not None: 
100              DOM.eventSetKeyCode(self.currentEvent, key) 
101   
102 -    def setName(self, name): 
103          DOM.setAttribute(self.getElement(), "name", name) 
104   
105 -    def setSelectionRange(self, pos, length): 
106          if length < 0: 
107              # throw new IndexOutOfBoundsException("Length must be a positive integer. Length: " + length); 
108              console.error("Length must be a positive integer. Length: " + length) 
109   
110          if (pos < 0) or (length + pos > len(self.getText())): 
111              #throw new IndexOutOfBoundsException("From Index: " + pos + "  To Index: " + (pos + length) + "  Text Length: " + getText().length()); 
112              console.error("From Index: %d " % pos + "  To Index: %d " % (pos + length) + "  Text Length: %d " % len(self.getText())) 
113   
114          element = self.getElement() 
115          element.setSelectionRange(pos, pos + length) 
116   
117 -    def setText(self, text): 
118          DOM.setAttribute(self.getElement(), "value", str(text)) 
119   
120 -    def setTextAlignment(self, align): 
121          DOM.setStyleAttribute(self.getElement(), "textAlign", align) 
122   
123  # TODO: work out if TextBoxBase is appropriate to create in Factory. 
124  # Factory.registerClass('pyjamas.ui.TextBoxBase', TextBoxBase) 
125