org.simantics.interop/src/org/simantics/interop/utils/StringColumnComparator.java

   1 package org.simantics.interop.utils;\r
   2 \r
   3 import org.eclipse.jface.viewers.CellLabelProvider;\r
   4 import org.eclipse.jface.viewers.ContentViewer;\r
   5 import org.eclipse.jface.viewers.IBaseLabelProvider;\r
   6 import org.eclipse.jface.viewers.ILabelProvider;\r
   7 import org.eclipse.jface.viewers.ITableLabelProvider;\r
   8 import org.eclipse.jface.viewers.TableViewer;\r
   9 import org.eclipse.jface.viewers.Viewer;\r
  10 import org.eclipse.jface.viewers.ViewerComparator;\r
  11 \r
  12 public class StringColumnComparator extends ViewerComparator {\r
  13         private int propertyIndex;\r
  14         private static final int DESCENDING = 1;\r
  15         private int direction = DESCENDING;\r
  16         \r
  17         public StringColumnComparator() {\r
  18                 this.propertyIndex = 0;\r
  19                 this.direction = DESCENDING;\r
  20         }\r
  21         \r
  22         public void setColumnt(int column) {\r
  23                 if (column == this.propertyIndex) {\r
  24                         direction = 1-direction;\r
  25                 } else {\r
  26                         this.propertyIndex = column;\r
  27                         direction = DESCENDING;\r
  28                 }\r
  29         }\r
  30         \r
  31         @SuppressWarnings("unchecked")\r
  32         @Override\r
  33         public int compare(Viewer viewer, Object e1, Object e2) {\r
  34                 \r
  35                 \r
  36                 int cat1 = category(e1);\r
  37         int cat2 = category(e2);\r
  38 \r
  39         if (cat1 != cat2) {\r
  40                         return cat1 - cat2;\r
  41                 }\r
  42         \r
  43         String name1 = null;\r
  44         String name2 = null;\r
  45         \r
  46         \r
  47         \r
  48         if (viewer == null || !(viewer instanceof ContentViewer)) {\r
  49             name1 = e1.toString();\r
  50             name2 = e2.toString();\r
  51         } else {\r
  52             IBaseLabelProvider prov = ((ContentViewer) viewer).getLabelProvider();\r
  53             if (viewer instanceof TableViewer && ((TableViewer)viewer).getLabelProvider(propertyIndex) != null) {\r
  54                 CellLabelProvider clp = ((TableViewer)viewer).getLabelProvider(propertyIndex);\r
  55                 if (clp instanceof ILabelProvider) {\r
  56                         ILabelProvider ilb = (ILabelProvider)clp;\r
  57                         name1 = ilb.getText(e1);\r
  58                         name2 = ilb.getText(e2);\r
  59                 }\r
  60             }\r
  61             if (name1 == null) {\r
  62                     if (prov instanceof ITableLabelProvider) {\r
  63                         ITableLabelProvider lprov = (ITableLabelProvider) prov;\r
  64                         name1 = lprov.getColumnText(e1,propertyIndex);\r
  65                         name2 = lprov.getColumnText(e2,propertyIndex);\r
  66                     } else if (prov instanceof ILabelProvider) {\r
  67                         ILabelProvider lprov = (ILabelProvider) prov;\r
  68                         name1 = lprov.getText(e1);\r
  69                         name2 = lprov.getText(e2);\r
  70                     } else {\r
  71                         name1 = e1.toString();\r
  72                         name2 = e2.toString();\r
  73                     }\r
  74             }\r
  75         }\r
  76         if (name1 == null) {\r
  77                         name1 = "";//$NON-NLS-1$\r
  78                 }\r
  79         if (name2 == null) {\r
  80                         name2 = "";//$NON-NLS-1$\r
  81                 }\r
  82 \r
  83         // use the comparator to compare the strings\r
  84         int rc = getComparator().compare(name1, name2);\r
  85                 if (direction != DESCENDING)\r
  86                         rc = -rc;\r
  87                 return rc;\r
  88         }\r
  89         \r
  90 }\r
  91 \r