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         @Override\r
  32         public int compare(Viewer viewer, Object e1, Object e2) {\r
  33                 \r
  34                 int rc = 0;\r
  35                 \r
  36                 int cat1 = category(e1);\r
  37         int cat2 = category(e2);\r
  38 \r
  39         if (cat1 != cat2) {\r
  40                         rc =  cat1 - cat2;\r
  41                 } else {\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                 rc = getComparator().compare(name1, name2);\r
  85                 }\r
  86                 if (direction != DESCENDING)\r
  87                         rc = -rc;\r
  88                 return rc;\r
  89         }\r
  90         \r
  91 }\r
  92 \r