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package org.eclipse.equinox.p2.examples.rcp.prestartupdate;
import java.util.ArrayList;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.ISharedImages;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.part.ViewPart;
public class NavigationView extends ViewPart {
public static final String ID = "org.eclipse.equinox.p2.examples.rcp.prestartupdate.navigationView";
private TreeViewer viewer;
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();
}
}
class TreeParent extends TreeObject {
private ArrayList children;
public TreeParent(String name) {
super(name);
children = new ArrayList();
}
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;
}
}
class ViewContentProvider implements IStructuredContentProvider,
ITreeContentProvider {
public void inputChanged(Viewer v, Object oldInput, Object newInput) {
}
public void dispose() {
}
public Object[] getElements(Object parent) {
return getChildren(parent);
}
public Object getParent(Object child) {
if (child instanceof TreeObject) {
return ((TreeObject)child).getParent();
}
return null;
}
public Object[] getChildren(Object parent) {
if (parent instanceof TreeParent) {
return ((TreeParent)parent).getChildren();
}
return new Object[0];
}
public boolean hasChildren(Object parent) {
if (parent instanceof TreeParent)
return ((TreeParent)parent).hasChildren();
return false;
}
}
class ViewLabelProvider extends LabelProvider {
public String getText(Object obj) {
return obj.toString();
}
public Image getImage(Object obj) {
String imageKey = ISharedImages.IMG_OBJ_ELEMENT;
if (obj instanceof TreeParent)
imageKey = ISharedImages.IMG_OBJ_FOLDER;
return PlatformUI.getWorkbench().getSharedImages().getImage(imageKey);
}
}
/**
* We will set up a dummy model to initialize tree heararchy. In real
* code, you will connect to a real model and expose its hierarchy.
*/
private TreeObject createDummyModel() {
TreeObject to1 = new TreeObject("Inbox");
TreeObject to2 = new TreeObject("Drafts");
TreeObject to3 = new TreeObject("Sent");
TreeParent p1 = new TreeParent("me@this.com");
p1.addChild(to1);
p1.addChild(to2);
p1.addChild(to3);
TreeObject to4 = new TreeObject("Inbox");
TreeParent p2 = new TreeParent("other@aol.com");
p2.addChild(to4);
TreeParent root = new TreeParent("");
root.addChild(p1);
root.addChild(p2);
return root;
}
/**
* This is a callback that will allow us to create the viewer and initialize
* it.
*/
public void createPartControl(Composite parent) {
viewer = new TreeViewer(parent, SWT.MULTI | SWT.H_SCROLL | SWT.V_SCROLL | SWT.BORDER);
viewer.setContentProvider(new ViewContentProvider());
viewer.setLabelProvider(new ViewLabelProvider());
viewer.setInput(createDummyModel());
}
/**
* Passing the focus request to the viewer's control.
*/
public void setFocus() {
viewer.getControl().setFocus();
}
}
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