Mega Code Archive
SWT Tree Composite
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/*
SWT/JFace in Action
GUI Design with Eclipse 3.0
Matthew Scarpino, Stephen Holder, Stanford Ng, and Laurent Mihalkovic
ISBN: 1932394273
Publisher: Manning
*/
import java.util.ArrayList;
import java.util.List;
import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Composite;
public class Ch8TreeComposite extends Composite {
public Ch8TreeComposite(Composite parent) {
super(parent, SWT.NULL);
populateControl();
}
protected void populateControl() {
FillLayout compositeLayout = new FillLayout();
setLayout(compositeLayout);
int[] selectionStyle = { SWT.SINGLE, SWT.MULTI };
int[] checkStyle = { SWT.NONE, SWT.CHECK };
for (int selection = 0; selection < selectionStyle.length; selection++) {
for (int check = 0; check < checkStyle.length; check++) {
int style = selectionStyle[selection] | checkStyle[check];
createTreeViewer(style);
}
}
}
private void createTreeViewer(int style) {
TreeViewer viewer = new TreeViewer(this, style);
viewer.setContentProvider(new ITreeContentProvider() {
public Object[] getChildren(Object parentElement) {
return ((TreeNode) parentElement).getChildren().toArray();
}
public Object getParent(Object element) {
return ((TreeNode) element).getParent();
}
public boolean hasChildren(Object element) {
return ((TreeNode) element).getChildren().size() > 0;
}
public Object[] getElements(Object inputElement) {
return ((TreeNode) inputElement).getChildren().toArray();
}
public void dispose() {
}
public void inputChanged(Viewer viewer, Object oldInput,
Object newInput) {
}
});
viewer.setInput(getRootNode());
}
private TreeNode getRootNode() {
TreeNode root = new TreeNode("root");
root.addChild(new TreeNode("child 1").addChild(new TreeNode(
"subchild 1")));
root.addChild(new TreeNode("child 2").addChild(new TreeNode(
"subchild 2").addChild(new TreeNode("grandchild 1"))));
return root;
}
}
class TreeNode {
private String name;
private List children = new ArrayList();
private TreeNode parent;
public TreeNode(String n) {
name = n;
}
protected Object getParent() {
return parent;
}
public TreeNode addChild(TreeNode child) {
children.add(child);
child.parent = this;
return this;
}
public List getChildren() {
return children;
}
public String toString() {
return name;
}
}
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