bundles/org.simantics.document.swt.core/src/org/simantics/document/swt/core/base/WidgetContainer.java

   1 package org.simantics.document.swt.core.base;\r
   2 \r
   3 import org.eclipse.swt.widgets.Composite;\r
   4 import org.eclipse.swt.widgets.Control;\r
   5 import org.simantics.document.server.JSONObject;\r
   6 import org.simantics.document.server.client.WidgetData;\r
   7 import org.simantics.document.swt.core.SWTDocument;\r
   8 \r
   9 public abstract class WidgetContainer<C extends Control> {\r
  10         \r
  11         C control;\r
  12         \r
  13         abstract protected Control doCreateControl(SWTDocument document, Composite parent, JSONObject object);\r
  14         abstract protected void doUpdateProperties(SWTDocument document, Control control, JSONObject object);\r
  15         \r
  16         @SuppressWarnings("unchecked")\r
  17         public void createControl(SWTDocument document, Composite parent, final JSONObject object) {\r
  18                 control = (C)doCreateControl(document, parent, object);\r
  19                 if(control == null) {\r
  20                         new Exception().printStackTrace();\r
  21                         return;\r
  22                 }\r
  23                 doUpdateProperties(document, control, object);\r
  24         }\r
  25         \r
  26         public C getControl() {\r
  27                 return (C)control;\r
  28         }\r
  29         \r
  30         @SuppressWarnings("unchecked")\r
  31         public <T> T getOrCreateControl(SWTDocument document, JSONObject object) {\r
  32                 if(control == null || control.isDisposed()) {\r
  33                         String parentId = object.getJSONField("parent");\r
  34                         WidgetData parent = document.getWidget(parentId);\r
  35                         if(parent != null) {\r
  36                                 WidgetContainer<?> parentContainer = (WidgetContainer<?>)parent.widget;\r
  37                                 Composite pc = (Composite)parentContainer.getOrCreateControl(document, parent.object);\r
  38                                 // TODO: pc may be disposed, how to handle this and why is it happening?\r
  39                                 if(pc != null && !pc.isDisposed())\r
  40                                         createControl(document, pc, object);\r
  41                         }\r
  42                 }\r
  43                 return (T)control;\r
  44         }\r
  45         \r
  46         public void updateProperties(SWTDocument document, JSONObject object) {\r
  47                 if(control != null) {\r
  48                         doUpdateProperties(document, control, object);\r
  49                 }\r
  50         }\r
  51         \r
  52 }