Source Code for Module library.pyjamas.ui.Panel

  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 Factory 
 16  from pyjamas import DOM 
 17   
 18  from pyjamas.ui.Widget import Widget 
 19   
 20 -class PanelBase(object): 
 21   
 22 -    def clear(self): 
 23          """ use this method, due to list changing as it's being iterated. 
 24              also, it's possible to use this method even 
 25          """ 
 26          children = [] 
 27          for child in self.__iter__(): 
 28              children.append(child) 
 29   
 30          for child in children: 
 31              self.remove(child) 
 32   
 33 -    def doAttachChildren(self): 
 34          for child in self: 
 35              child.onAttach() 
 36   
 37 -    def doDetachChildren(self): 
 38          for child in self: 
 39              child.onDetach() 
 40   
 41 -    def getWidgetCount(self): 
 42          return len(self.getChildren()) 
 43   
 44 -    def getWidget(self, index): 
 45          return self.getChildren()[index] 
 46   
 47 -    def getIndexedChild(self, index): 
 48          return self.getWidget(index) 
 49   
 50 -    def addIndexedItem(self, index, child): 
 51          self.add(child) 
 52   
 53 -    def getWidgetIndex(self, child): 
 54          return self.getChildren().index(child) 
 55   
 56 -    def getChildren(self): 
 57          return self.children # assumes self.children: override if needed. 
 58   
 59 -    def setWidget(self, index, widget): 
 60          """ Insert (or optionally replace) the widget at the given index 
 61              with a new one 
 62          """ 
 63          existing = self.getWidget(index) 
 64          if existing is not None: 
 65              self.remove(existing) 
 66          self.insert(widget, index) 
 67   
 68 -    def append(self, widget): 
 69          return self.add(widget) 
 70   
 71 -    def __setitem__(self, index, widget): 
 72          return self.setWidget(index, widget) 
 73   
 74 -    def __getitem__(self, index): 
 75          return self.getWidget(index) 
 76   
 77 -    def __len__(self): 
 78          return len(self.getChildren()) 
 79   
 80 -    def __nonzero__(self): 
 81          return self is not None 
 82   
 83 -    def __iter__(self): 
 84          return self.getChildren().__iter__() 
 85   
 86   
 87 -class Panel(PanelBase, Widget): 
 88 -    def __init__(self, **kwargs): 
 89          self.children = [] 
 90          PanelBase.__init__(self) 
 91          Widget.__init__(self, **kwargs) 
 92   
 93 -    def disown(self, widget): 
 94          if widget.getParent() is not self: 
 95              raise Exception("widget %s is not a child of this panel %s" % \ 
 96                               (str(widget), str(self))) 
 97          element = widget.getElement() 
 98          widget.setParent(None) 
 99          parentElement = DOM.getParent(element) 
100          if parentElement is not None: 
101              DOM.removeChild(parentElement, element) 
102   
103 -    def adopt(self, widget, container): 
104          if container is not None: 
105              widget.removeFromParent() 
106              DOM.appendChild(container, widget.getElement()) 
107          widget.setParent(self) 
108   
109   
110  Factory.registerClass('pyjamas.ui.Panel', 'Panel', Panel) 
111