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                 int rc = 0;\r
  36                 \r
  37                 int cat1 = category(e1);\r
  38         int cat2 = category(e2);\r
  39 \r
  40         if (cat1 != cat2) {\r
  41                         rc =  cat1 - cat2;\r
  42                 } else {\r
  43         \r
  44                 String name1 = null;\r
  45                 String name2 = null;\r
  46                 \r
  47                 \r
  48                 \r
  49                 if (viewer == null || !(viewer instanceof ContentViewer)) {\r
  50                     name1 = e1.toString();\r
  51                     name2 = e2.toString();\r
  52                 } else {\r
  53                     IBaseLabelProvider prov = ((ContentViewer) viewer).getLabelProvider();\r
  54                     if (viewer instanceof TableViewer && ((TableViewer)viewer).getLabelProvider(propertyIndex) != null) {\r
  55                         CellLabelProvider clp = ((TableViewer)viewer).getLabelProvider(propertyIndex);\r
  56                         if (clp instanceof ILabelProvider) {\r
  57                                 ILabelProvider ilb = (ILabelProvider)clp;\r
  58                                 name1 = ilb.getText(e1);\r
  59                                 name2 = ilb.getText(e2);\r
  60                         }\r
  61                     }\r
  62                     if (name1 == null) {\r
  63                             if (prov instanceof ITableLabelProvider) {\r
  64                                 ITableLabelProvider lprov = (ITableLabelProvider) prov;\r
  65                                 name1 = lprov.getColumnText(e1,propertyIndex);\r
  66                                 name2 = lprov.getColumnText(e2,propertyIndex);\r
  67                             } else if (prov instanceof ILabelProvider) {\r
  68                                 ILabelProvider lprov = (ILabelProvider) prov;\r
  69                                 name1 = lprov.getText(e1);\r
  70                                 name2 = lprov.getText(e2);\r
  71                             } else {\r
  72                                 name1 = e1.toString();\r
  73                                 name2 = e2.toString();\r
  74                             }\r
  75                     }\r
  76                 }\r
  77                 if (name1 == null) {\r
  78                                 name1 = "";//$NON-NLS-1$\r
  79                         }\r
  80                 if (name2 == null) {\r
  81                                 name2 = "";//$NON-NLS-1$\r
  82                         }\r
  83         \r
  84                 // use the comparator to compare the strings\r
  85                 rc = getComparator().compare(name1, name2);\r
  86                 }\r
  87                 if (direction != DESCENDING)\r
  88                         rc = -rc;\r
  89                 return rc;\r
  90         }\r
  91         \r
  92 }\r
  93 \r