bundles/org.simantics.views.swt.client/src/org/simantics/views/swt/client/impl/SWTCombo.java

   1 package org.simantics.views.swt.client.impl;
   2
   3 import java.util.List;
   4
   5 import org.eclipse.swt.events.ModifyEvent;
   6 import org.eclipse.swt.events.ModifyListener;
   7 import org.eclipse.swt.widgets.Combo;
   8 import org.eclipse.swt.widgets.Composite;
   9 import org.simantics.scl.runtime.tuple.Tuple;
  10
  11 public class SWTCombo extends SWTComboBase<Combo> {
  12
  13         private static final long serialVersionUID = 3355806440902480450L;
  14
  15         private final ModifyListener listener = new ModifyListener() {
  16
  17                 @Override
  18                 public void modifyText(ModifyEvent e) {
  19
  20                         int selectionIndex = control.getSelectionIndex();
  21                         if (selectionIndex == -1)
  22                             return;
  23
  24                         String[] items = control.getItems();
  25
  26                         String key = items[selectionIndex];
  27
  28                         if(modifier != null)
  29                                 modifier.apply(key);
  30
  31                         selected = key;
  32
  33                 }
  34
  35         };
  36
  37         @Override
  38         public void createControls(Composite parent) {
  39
  40                 control = new Combo(parent, style);
  41                 // Must initially add modifylistener before invoking setProperties
  42                 // since setProperties will invoke synchronize*-methods, which do
  43                 // removeModifyListener + addModifyListener. Otherwise modify listener
  44                 // would get added twice to the control.
  45                 control.addModifyListener(listener);
  46
  47                 setProperties();
  48
  49         }
  50
  51         public void synchronizeAvailable(List<Tuple> available) {
  52
  53                 if(available != null) {
  54
  55                 control.removeModifyListener(listener);
  56                 control.setData(available);
  57                 control.clearSelection();
  58                 try {
  59                         control.removeAll();
  60                 } catch (Throwable t) {
  61                     t.printStackTrace();
  62                 }
  63                 if (available != null) {
  64                     int index = 0;
  65                     for(Tuple key : available) {
  66                         control.add((String)key.get(0));
  67                         control.setData((String)key.get(0), index++);
  68                     }
  69                     String selectionKey = (String)control.getData("_SelectionKey");
  70                     if(selectionKey != null) {
  71                         Integer selectionIndex = (Integer)control.getData(selectionKey);
  72                         if(selectionIndex != null) control.select(selectionIndex);
  73                     }
  74                 }
  75                 control.addModifyListener(listener);
  76
  77 //                      // This seems to be necessary for correct size computations
  78 //                      widget.getControl().getParent().layout(true);
  79                 }
  80         }
  81
  82         public void synchronizeSelected(String selected) {
  83
  84                 if(selected != null) {
  85
  86                 control.removeModifyListener(listener);
  87                 control.setData("_SelectionKey", selected);
  88                 Integer selectionIndex = (Integer)control.getData(selected);
  89                 if(selectionIndex != null) control.select(selectionIndex);
  90                 control.addModifyListener(listener);
  91
  92                 }
  93
  94         }
  95
  96 }