TreeViewer with checkbox

Question

I am currently creatin a TreeView where leaf elements should be checkable.

I created the sampleTreeView from the eclipse plugin that comes with a predefined Tree structure.

public class TreeObject {
    private String name;
    private TreeParent parent;

    public TreeObject(String name) {
       this.name = name;
     }
     public String getName() {
        return name;
     }
     public void setParent(TreeParent parent) {
         this.parent = parent;
     }
     public TreeParent getParent() {
        return parent;
     }
     public String toString() {
        return getName();
     }
     public Object getAdapter(Class<?> key) {
    return null;
    }
}


public class TreeParent  extends TreeObject{
     private ArrayList<TreeObject> children;
     public TreeParent(String name) {
        super(name);
         children = new ArrayList<TreeObject>();
     }
     public void addChild(TreeObject child) {
         children.add(child);
         child.setParent(this);
     }
     public void removeChild(TreeObject child) {
         children.remove(child);
         child.setParent(null);
   }
     public TreeObject [] getChildren() {
         return (TreeObject [])children.toArray(new TreeObject[children.size()]);
   }
      public boolean hasChildren() {
         return children.size()>0;
   }
}

I then found the following tutorial. He is using the TreeItem Object where it is easy to attach a Image. Can I somehow Copy this function or do I have to use the TreeItem object as my data structure?

possible duplicate of [JTree with checkboxes](http://stackoverflow.com/questions/1223188/jtree-with-checkboxes) — nashuald, Nov 19 '13 at 11:45
@nashuald This question is about jface class TreeViewer, while you are pointing to JTree which is from swing. — Basilevs, Jan 27 '14 at 17:32

greg-449 · Answer 1 · 2013-11-19T12:47:47.057

0

The tutorial says at the beginning of part 2 that you should use a ContentProvider and LabelProvider for the TreeViewer rather than use TreeItem, and that is what you should do.

The getImage method of the label provider would return the checked / unchecked /null image.

When you need to change an image call TreeViewer.update or TreeViewer.refresh if the children of the object also need refreshing. This will call the label provider again.

edited Nov 19 '13 at 12:47

answered Nov 19 '13 at 11:44

greg-449

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But how do I call the LabelProvider once it set the inital images? – Ogofo Nov 19 '13 at 12:30
Or rather call [fireLabelProviderChanged](http://help.eclipse.org/indigo/nftopic/org.eclipse.platform.doc.isv/reference/api/org/eclipse/jface/viewers/BaseLabelProvider.html#fireLabelProviderChanged%28org.eclipse.jface.viewers.LabelProviderChangedEvent%29) – Basilevs Jan 27 '14 at 17:34

TreeViewer with checkbox

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