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Friday, July 2, 2010

Content and Label Provider

Create the following label and content provider for your JFace viewers.

   
package de.vogella.dnd.jface.viewers;

import java.util.List;

import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.Viewer;

import de.vogella.dnd.jface.model.Todo;

public class TableContentProvider implements IStructuredContentProvider {

@Override
public Object[] getElements(Object inputElement) {
List list = (List) inputElement;
return list.toArray();
}

@Override
public void dispose() {

}

@Override
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
}

}

   
package de.vogella.dnd.jface.viewers;

import java.util.List;

import org.eclipse.jface.viewers.ITreeContentProvider;
import org.eclipse.jface.viewers.Viewer;

public class TreeContentProvider implements ITreeContentProvider {

@Override
public Object[] getChildren(Object parentElement) {
return null;
}

@Override
public Object getParent(Object element) {
return null;
}

@Override
public boolean hasChildren(Object element) {
return false;
}

@Override
public Object[] getElements(Object inputElement) {
List list = (List) inputElement;
return list.toArray();
}

@Override
public void dispose() {

}

@Override
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
}

}

   
package de.vogella.dnd.jface.viewers;

import org.eclipse.jface.viewers.BaseLabelProvider;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.swt.graphics.Image;

import de.vogella.dnd.jface.model.Todo;

public class TableLabelProvider extends BaseLabelProvider implements
ITableLabelProvider {

@Override
public Image getColumnImage(Object element, int columnIndex) {
return null;
}

@Override
public String getColumnText(Object element, int columnIndex) {
Todo todo = (Todo) element;
switch (columnIndex) {
case 0:
return todo.getShortDescription();
case 1:
return todo.getLongDescription();
}
return "Not supported";
}

}

   
package de.vogella.dnd.jface.viewers;

import org.eclipse.jface.viewers.LabelProvider;


public class TreeLabelProvider extends LabelProvider {
@Override
public String getText(Object element) {
String s = (String) element;
return s;
}

}

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