archive/net.sourceforge.phpeclipse.quantum.sql/src/com/quantum/view/widget/ComboViewer.java

   1 package com.quantum.view.widget;
   2
   3 import org.eclipse.jface.viewers.ContentViewer;
   4 import org.eclipse.jface.viewers.ILabelProvider;
   5 import org.eclipse.jface.viewers.ISelection;
   6 import org.eclipse.jface.viewers.IStructuredContentProvider;
   7 import org.eclipse.jface.viewers.IStructuredSelection;
   8 import org.eclipse.jface.viewers.SelectionChangedEvent;
   9 import org.eclipse.jface.viewers.StructuredSelection;
  10 import org.eclipse.swt.SWT;
  11 import org.eclipse.swt.events.SelectionAdapter;
  12 import org.eclipse.swt.events.SelectionEvent;
  13 import org.eclipse.swt.widgets.Combo;
  14 import org.eclipse.swt.widgets.Composite;
  15 import org.eclipse.swt.widgets.Control;
  16
  17 /**
  18  * <p>A Combo viewer.
  19  *
  20  * <p>In Eclipse version 3.0, a standard JFace ComboViewer class exists.
  21  *
  22  * @author BC Holmes
  23  */
  24 public class ComboViewer extends ContentViewer {
  25
  26         private Combo combo;
  27
  28         private Object[] objects = new Object[0];
  29
  30         public ComboViewer(Composite parent) {
  31                 this.combo = new Combo(parent, SWT.SIMPLE | SWT.DROP_DOWN | SWT.READ_ONLY);
  32                 this.combo.addSelectionListener(new SelectionAdapter() {
  33                         public void widgetSelected(SelectionEvent event) {
  34                                 ComboViewer.this.fireSelectionChanged(new SelectionChangedEvent(
  35                                                 ComboViewer.this, getSelection()) );
  36                         }
  37                 });
  38         }
  39
  40         public Control getControl() {
  41                 return this.combo;
  42         }
  43
  44         public ISelection getSelection() {
  45                 int index = this.combo.getSelectionIndex();
  46
  47                 return (this.objects == null || index >= this.objects.length || index < 0)
  48                                 ? new StructuredSelection()
  49                                 : new StructuredSelection(this.objects[index]);
  50         }
  51
  52         protected void inputChanged(Object input, Object oldInput) {
  53                 super.inputChanged(input, oldInput);
  54
  55                 if (input == null) {
  56                         this.objects = new Object[0];
  57                 } else {
  58                         this.objects = ((IStructuredContentProvider) getContentProvider()).getElements(input);
  59                         for (int i = 0, length = this.objects == null ? 0 : this.objects.length; i < length; i++) {
  60                                 String label = ((ILabelProvider) getLabelProvider()).getText(this.objects[i]);
  61                                 this.combo.add(label);
  62                         }
  63                 }
  64         }
  65         public void refresh() {
  66         }
  67
  68         public void setSelection(ISelection selection, boolean reveal) {
  69                 if (selection != null && selection instanceof IStructuredSelection) {
  70                         Object object = ((IStructuredSelection) selection).getFirstElement();
  71                         for (int i = 0, length = this.objects == null ? 0 : this.objects.length;
  72                                         object != null && i < length; i++) {
  73                                 if (this.objects[i].equals(object)) {
  74                                         this.combo.select(i);
  75                                 }
  76                         }
  77                 }
  78         }
  79 }