src/eu/etaxonomy/taxeditor/NavigationView.java

   1 package eu.etaxonomy.taxeditor;
   2
   3 import java.util.ArrayList;
   4
   5 import org.eclipse.jface.viewers.IStructuredContentProvider;
   6 import org.eclipse.jface.viewers.ITreeContentProvider;
   7 import org.eclipse.jface.viewers.LabelProvider;
   8 import org.eclipse.jface.viewers.TreeViewer;
   9 import org.eclipse.jface.viewers.Viewer;
  10 import org.eclipse.swt.SWT;
  11 import org.eclipse.swt.graphics.Image;
  12 import org.eclipse.swt.widgets.Composite;
  13 import org.eclipse.ui.ISharedImages;
  14 import org.eclipse.ui.PlatformUI;
  15 import org.eclipse.ui.part.ViewPart;
  16
  17 public class NavigationView extends ViewPart {
  18         public static final String ID = "eu.etaxonomy.taxeditor.navigationView";
  19         private TreeViewer viewer;
  20
  21         class TreeObject {
  22                 private String name;
  23                 private TreeParent parent;
  24
  25                 public TreeObject(String name) {
  26                         this.name = name;
  27                 }
  28                 public String getName() {
  29                         return name;
  30                 }
  31                 public void setParent(TreeParent parent) {
  32                         this.parent = parent;
  33                 }
  34                 public TreeParent getParent() {
  35                         return parent;
  36                 }
  37                 public String toString() {
  38                         return getName();
  39                 }
  40         }
  41
  42         class TreeParent extends TreeObject {
  43                 private ArrayList children;
  44                 public TreeParent(String name) {
  45                         super(name);
  46                         children = new ArrayList();
  47                 }
  48                 public void addChild(TreeObject child) {
  49                         children.add(child);
  50                         child.setParent(this);
  51                 }
  52                 public void removeChild(TreeObject child) {
  53                         children.remove(child);
  54                         child.setParent(null);
  55                 }
  56                 public TreeObject[] getChildren() {
  57                         return (TreeObject[]) children.toArray(new TreeObject[children.size()]);
  58                 }
  59                 public boolean hasChildren() {
  60                         return children.size()>0;
  61                 }
  62         }
  63
  64         class ViewContentProvider implements IStructuredContentProvider,
  65                                                                                    ITreeContentProvider {
  66
  67         public void inputChanged(Viewer v, Object oldInput, Object newInput) {
  68                 }
  69
  70                 public void dispose() {
  71                 }
  72
  73                 public Object[] getElements(Object parent) {
  74                         return getChildren(parent);
  75                 }
  76
  77                 public Object getParent(Object child) {
  78                         if (child instanceof TreeObject) {
  79                                 return ((TreeObject)child).getParent();
  80                         }
  81                         return null;
  82                 }
  83
  84                 public Object[] getChildren(Object parent) {
  85                         if (parent instanceof TreeParent) {
  86                                 return ((TreeParent)parent).getChildren();
  87                         }
  88                         return new Object[0];
  89                 }
  90
  91         public boolean hasChildren(Object parent) {
  92                         if (parent instanceof TreeParent)
  93                                 return ((TreeParent)parent).hasChildren();
  94                         return false;
  95                 }
  96         }
  97
  98         class ViewLabelProvider extends LabelProvider {
  99
 100                 public String getText(Object obj) {
 101                         return obj.toString();
 102                 }
 103                 public Image getImage(Object obj) {
 104                         String imageKey = ISharedImages.IMG_OBJ_ELEMENT;
 105                         if (obj instanceof TreeParent)
 106                            imageKey = ISharedImages.IMG_OBJ_FOLDER;
 107                         return PlatformUI.getWorkbench().getSharedImages().getImage(imageKey);
 108                 }
 109         }
 110
 111     /**
 112      * We will set up a dummy model to initialize tree heararchy. In real
 113      * code, you will connect to a real model and expose its hierarchy.
 114      */
 115     private TreeObject createDummyModel() {
 116         TreeObject to1 = new TreeObject("Inbox");
 117         TreeObject to2 = new TreeObject("Drafts");
 118         TreeObject to3 = new TreeObject("Sent");
 119         TreeParent p1 = new TreeParent("me@this.com");
 120         p1.addChild(to1);
 121         p1.addChild(to2);
 122         p1.addChild(to3);
 123
 124         TreeObject to4 = new TreeObject("Inbox");
 125         TreeParent p2 = new TreeParent("other@aol.com");
 126         p2.addChild(to4);
 127
 128         TreeParent root = new TreeParent("");
 129         root.addChild(p1);
 130         root.addChild(p2);
 131         return root;
 132     }
 133
 134         /**
 135      * This is a callback that will allow us to create the viewer and initialize
 136      * it.
 137      */
 138         public void createPartControl(Composite parent) {
 139                 viewer = new TreeViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
 140                 viewer.setContentProvider(new ViewContentProvider());
 141                 viewer.setLabelProvider(new ViewLabelProvider());
 142                 viewer.setInput(createDummyModel());
 143         }
 144
 145         /**
 146          * Passing the focus request to the viewer's control.
 147          */
 148         public void setFocus() {
 149                 viewer.getControl().setFocus();
 150         }
 151 }