Source Code for Module pyjamas.ui.StackPanel

  1  # Copyright 2006 James Tauber and contributors 
  2  # Copyright (C) 2009, 2010 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   
 16  from pyjamas import DOM 
 17  from pyjamas import Factory 
 18   
 19  from pyjamas.ui.CellPanel import CellPanel 
 20  from pyjamas.ui import Event 
 21   
 22 -class StackPanel(CellPanel): 
 23   
 24 -    def __init__(self, **kwargs): 
 25          self.visibleStack = -1 
 26          self.indices = {} 
 27          self.stackListeners = [] 
 28   
 29          kwargs['StyleName'] = kwargs.get('StyleName', "gwt-StackPanel") 
 30   
 31          CellPanel.__init__(self, **kwargs) 
 32          DOM.sinkEvents(self.getElement(), Event.ONCLICK) 
 33   
 34 -    def addStackChangeListener(self, listener): 
 35          self.stackListeners.append(listener) 
 36   
 37 -    def add(self, widget, stackText="", asHTML=False): 
 38          widget.removeFromParent() 
 39          index = self.getWidgetCount() 
 40   
 41          tr = DOM.createTR() 
 42          td = DOM.createTD() 
 43          DOM.appendChild(self.body, tr) 
 44          DOM.appendChild(tr, td) 
 45          self.setStyleName(td, "gwt-StackPanelItem", True) 
 46          self._setIndex(td, index) 
 47          DOM.setAttribute(td, "height", "1px") 
 48   
 49          tr = DOM.createTR() 
 50          td = DOM.createTD() 
 51          DOM.appendChild(self.body, tr) 
 52          DOM.appendChild(tr, td) 
 53          DOM.setAttribute(td, "height", "100%") 
 54          DOM.setAttribute(td, "vAlign", "top") 
 55   
 56          CellPanel.add(self, widget, td) 
 57   
 58          self.setStackVisible(index, False) 
 59          if self.visibleStack == -1: 
 60              self.showStack(0) 
 61   
 62          if stackText != "": 
 63              self.setStackText(self.getWidgetCount() - 1, stackText, asHTML) 
 64   
 65 -    def onBrowserEvent(self, event): 
 66          if DOM.eventGetType(event) == "click": 
 67              index = self.getDividerIndex(DOM.eventGetTarget(event)) 
 68              if index != -1: 
 69                  self.showStack(index) 
 70   
 71      # also callable as remove(child) and remove(index) 
 72 -    def remove(self, child, index=None): 
 73          if index is None: 
 74              if isinstance(child, int): 
 75                  index = child 
 76                  child = self.getWidget(child) 
 77              else: 
 78                  index = self.getWidgetIndex(child) 
 79   
 80          if child.getParent() != self: 
 81              return False 
 82   
 83          if self.visibleStack == index: 
 84              self.visibleStack = -1 
 85          elif self.visibleStack > index: 
 86              self.visibleStack -= 1 
 87   
 88          rowIndex = 2 * index 
 89          tr = DOM.getChild(self.body, rowIndex) 
 90          DOM.removeChild(self.body, tr) 
 91          tr = DOM.getChild(self.body, rowIndex) 
 92          DOM.removeChild(self.body, tr) 
 93          CellPanel.remove(self, child) 
 94          rows = self.getWidgetCount() * 2 
 95   
 96          #for (int i = rowIndex; i < rows; i = i + 2) { 
 97          for i in range(rowIndex, rows, 2): 
 98              childTR = DOM.getChild(self.body, i) 
 99              td = DOM.getFirstChild(childTR) 
100              curIndex = self._getIndex(td) 
101              self._setIndex(td, index) 
102              index += 1 
103   
104          return True 
105   
106 -    def _setIndex(self, td, index): 
107          self.indices[td] = index 
108   
109 -    def _getIndex(self, td): 
110          return self.indices.get(td) 
111   
112 -    def setStackText(self, index, text, asHTML=False): 
113          if index >= self.getWidgetCount(): 
114              return 
115   
116          td = DOM.getChild(DOM.getChild(self.body, index * 2), 0) 
117          if asHTML: 
118              DOM.setInnerHTML(td, text) 
119          else: 
120              DOM.setInnerText(td, text) 
121   
122 -    def showStack(self, index): 
123          if (index >= self.getWidgetCount()) or (index == self.visibleStack): 
124              return 
125   
126          if self.visibleStack >= 0: 
127              self.setStackVisible(self.visibleStack, False) 
128   
129          self.visibleStack = index 
130          self.setStackVisible(self.visibleStack, True) 
131          for listener in self.stackListeners: 
132              listener.onStackChanged(self, index) 
133   
134 -    def getDividerIndex(self, elem): 
135          while (elem is not None) and not DOM.compare(elem, self.getElement()): 
136              expando = self._getIndex(elem) 
137              if expando is not None: 
138                  return int(expando) 
139   
140              elem = DOM.getParent(elem) 
141   
142          return -1 
143   
144 -    def setStackVisible(self, index, visible): 
145          tr = DOM.getChild(self.body, (index * 2)) 
146          if tr is None: 
147              return 
148   
149          td = DOM.getFirstChild(tr) 
150          self.setStyleName(td, "gwt-StackPanelItem-selected", visible) 
151   
152          tr = DOM.getChild(self.body, (index * 2) + 1) 
153          self.setVisible(tr, visible) 
154          self.getWidget(index).setVisible(visible) 
155   
156 -    def getSelectedIndex(self): 
157          return self.visibleStack 
158   
159  Factory.registerClass('pyjamas.ui.StackPanel', 'StackPanel', StackPanel) 
160