Source Code for Module library.pyjamas.ui.DockPanel

  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.CellPanel import CellPanel 
 19  from pyjamas.ui import HasHorizontalAlignment 
 20  from pyjamas.ui import HasVerticalAlignment 
 21   
 22 -class DockPanelTmpRow: 
 23      center = 0 
 24      tr = None 
 25   
 26 -class LayoutData: 
 27 -    def __init__(self, direction): 
 28          self.direction = direction 
 29          self.hAlign = "left" 
 30          self.height = "" 
 31          self.td = None 
 32          self.vAlign = "top" 
 33          self.width = "" 
 34   
 35   
 36 -class DockPanel(CellPanel): 
 37   
 38      CENTER = "center" 
 39      EAST = "east" 
 40      NORTH = "north" 
 41      SOUTH = "south" 
 42      WEST = "west" 
 43   
 44      elem_props = [ 
 45             ("height", "Cell Height", "CellHeight", str, None), 
 46             ("width", "Cell Width", "CellWidth", str, None), 
 47             ("halign", "Cell Horizontal Alignment", 
 48                        "CellHorizontalAlignment", None, "left"), 
 49             ("valign", "Cell Vertical Alignment", 
 50                        "CellVerticalAlignment", None, "top"), 
 51                   ] 
 52   
 53 -    def _getElementProps(self): 
 54          return CellPanel._getElementProps() + self.elem_props 
 55   
 56 -    def __init__(self, **kwargs): 
 57   
 58          self.center = None 
 59          self.dock_children = [] # cannot use self.children 
 60   
 61          CellPanel.__init__(self, **kwargs) 
 62   
 63 -    def add(self, widget, direction): 
 64          if direction == self.CENTER: 
 65              if self.center is not None: 
 66                  raise Exception("Only one CENTER widget may be added") 
 67              self.center = widget 
 68   
 69          layout = LayoutData(direction) 
 70          widget.setLayoutData(layout) 
 71          self.setCellHorizontalAlignment(widget, self.horzAlign) 
 72          self.setCellVerticalAlignment(widget, self.vertAlign) 
 73   
 74          self.dock_children.append(widget) 
 75          self.realizeTable(widget) 
 76   
 77      # next three functions are part of the standard Builder API for panels 
 78 -    def addIndexedItem(self, index, item): 
 79          self.add(item, index[1]) 
 80   
 81 -    def getWidgetIndex(self, widget): 
 82          index = self.dock_children.index(widget) 
 83          direction = self.getWidgetDirection(widget) 
 84          return (index, direction) 
 85   
 86 -    def getIndexedChild(self, index): 
 87          index, direction = index 
 88          return self.dock_children[index] 
 89   
 90 -    def getWidgetDirection(self, widget): 
 91          if widget.getParent() != self: 
 92              return None 
 93          return widget.getLayoutData().direction 
 94   
 95 -    def __len__(self): 
 96          return len(self.dock_children) 
 97   
 98 -    def __iter__(self): 
 99          return self.dock_children.__iter__() 
100   
101 -    def remove(self, widget): 
102          if widget == self.center: 
103              self.center = None 
104   
105          ret = CellPanel.remove(self, widget) 
106          if ret: 
107              self.dock_children.remove(widget) 
108              self.realizeTable(None) 
109          return ret 
110   
111 -    def setCellHeight(self, widget, height): 
112          data = widget.getLayoutData() 
113          data.height = height 
114          if data.td is not None: 
115              DOM.setStyleAttribute(data.td, "height", data.height) 
116   
117 -    def setCellHorizontalAlignment(self, widget, align): 
118          data = widget.getLayoutData() 
119          data.hAlign = align 
120          if data.td is not None: 
121              DOM.setAttribute(data.td, "align", data.hAlign) 
122   
123 -    def setCellVerticalAlignment(self, widget, align): 
124          data = widget.getLayoutData() 
125          data.vAlign = align 
126          if data.td is not None: 
127              DOM.setStyleAttribute(data.td, "verticalAlign", data.vAlign) 
128   
129 -    def setCellWidth(self, widget, width): 
130          data = widget.getLayoutData() 
131          data.width = width 
132          if data.td is not None: 
133              DOM.setStyleAttribute(data.td, "width", data.width) 
134   
135 -    def realizeTable(self, beingAdded): 
136          bodyElement = self.getBody() 
137   
138          while DOM.getChildCount(bodyElement) > 0: 
139              DOM.removeChild(bodyElement, DOM.getChild(bodyElement, 0)) 
140   
141          rowCount = 1 
142          colCount = 1 
143          for child in self.dock_children: 
144              dir = child.getLayoutData().direction 
145              if dir == self.NORTH or dir == self.SOUTH: 
146                  rowCount += 1 
147              elif dir == self.EAST or dir == self.WEST: 
148                  colCount += 1 
149   
150          rows = [] 
151          for i in range(rowCount): 
152              rows.append(DockPanelTmpRow()) 
153              rows[i].tr = DOM.createTR() 
154              DOM.appendChild(bodyElement, rows[i].tr) 
155   
156          westCol = 0 
157          eastCol = colCount - 1 
158          northRow = 0 
159          southRow = rowCount - 1 
160          centerTd = None 
161   
162          for child in self.dock_children: 
163              layout = child.getLayoutData() 
164   
165              td = DOM.createTD() 
166              layout.td = td 
167              DOM.setAttribute(layout.td, "align", layout.hAlign) 
168              DOM.setStyleAttribute(layout.td, "verticalAlign", layout.vAlign) 
169              DOM.setAttribute(layout.td, "width", layout.width) 
170              DOM.setAttribute(layout.td, "height", layout.height) 
171   
172              if layout.direction == self.NORTH: 
173                  DOM.insertChild(rows[northRow].tr, td, rows[northRow].center) 
174                  self.appendAndMaybeAdopt(td, child.getElement(), beingAdded) 
175                  DOM.setIntAttribute(td, "colSpan", eastCol - westCol + 1) 
176                  northRow += 1 
177              elif layout.direction == self.SOUTH: 
178                  DOM.insertChild(rows[southRow].tr, td, rows[southRow].center) 
179                  self.appendAndMaybeAdopt(td, child.getElement(), beingAdded) 
180                  DOM.setIntAttribute(td, "colSpan", eastCol - westCol + 1) 
181                  southRow -= 1 
182              elif layout.direction == self.WEST: 
183                  row = rows[northRow] 
184                  DOM.insertChild(row.tr, td, row.center) 
185                  row.center += 1 
186                  self.appendAndMaybeAdopt(td, child.getElement(), beingAdded) 
187                  DOM.setIntAttribute(td, "rowSpan", southRow - northRow + 1) 
188                  westCol += 1 
189              elif layout.direction == self.EAST: 
190                  row = rows[northRow] 
191                  DOM.insertChild(row.tr, td, row.center) 
192                  self.appendAndMaybeAdopt(td, child.getElement(), beingAdded) 
193                  DOM.setIntAttribute(td, "rowSpan", southRow - northRow + 1) 
194                  eastCol -= 1 
195              elif layout.direction == self.CENTER: 
196                  centerTd = td 
197   
198          if self.center is not None: 
199              row = rows[northRow] 
200              DOM.insertChild(row.tr, centerTd, row.center) 
201              self.appendAndMaybeAdopt(centerTd, self.center.getElement(), beingAdded) 
202   
203 -    def appendAndMaybeAdopt(self, parent, child, beingAdded): 
204          if beingAdded is not None: 
205              if DOM.compare(child, beingAdded.getElement()): 
206                  CellPanel.add(self, beingAdded, parent) 
207                  return 
208          DOM.appendChild(parent, child) 
209   
210  Factory.registerClass('pyjamas.ui.DockPanel', 'DockPanel', DockPanel) 
211