MultipleColumnsSample.java

package com.smartgwt.sample.showcase.client.tree.appearance;

import com.google.gwt.i18n.client.NumberFormat;
import com.smartgwt.client.widgets.Canvas;
import com.smartgwt.client.widgets.grid.CellFormatter;
import com.smartgwt.client.widgets.grid.ListGridRecord;
import com.smartgwt.client.widgets.tree.TreeGrid;
import com.smartgwt.client.widgets.tree.TreeGridField;
import com.smartgwt.sample.showcase.client.PanelFactory;
import com.smartgwt.sample.showcase.client.ShowcasePanel;
import com.smartgwt.sample.showcase.client.data.EmployeeXmlDS;

public class MultipleColumnsSample extends ShowcasePanel {
    private static final String DESCRIPTION = "<p>Trees can show multiple columns of data for each node. Each column has the styling, formatting, and data " +
            "type awareness features of columns in a normal grid.</p><p>Try drag reordering columns, or sorting by the Salary field.</p>";

    public static class Factory implements PanelFactory {
        private String id;

        public Canvas create() {
            MultipleColumnsSample panel = new MultipleColumnsSample();
            id = panel.getID();
            return panel;
        }

        public String getID() {
            return id;
        }

        public String getDescription() {
            return DESCRIPTION;
        }
    }

    public Canvas getViewPanel() {

        EmployeeXmlDS employeesDS = EmployeeXmlDS.getInstance();

        TreeGrid treeGrid = new TreeGrid();
        treeGrid.setCanEdit(true);
        treeGrid.setLoadDataOnDemand(false);
        treeGrid.setWidth(500);
        treeGrid.setHeight(400);
        treeGrid.setDataSource(employeesDS);
        treeGrid.setNodeIcon("icons/16/person.png");
        treeGrid.setFolderIcon("icons/16/person.png");
        treeGrid.setShowOpenIcons(false);
        treeGrid.setShowDropIcons(false);
        treeGrid.setClosedIconSuffix("");
        treeGrid.setAutoFetchData(true);

        TreeGridField nameField = new TreeGridField("Name");
        TreeGridField jobField = new TreeGridField("Job");
        TreeGridField salaryField = new TreeGridField("Salary");
        salaryField.setCellFormatter(new CellFormatter() {
            public String format(Object value, ListGridRecord record, int rowNum, int colNum) {
                if(value != null) {
                    NumberFormat nf = NumberFormat.getFormat("#,##0");
                    try {
                        return "$" + nf.format(((Number)value).longValue());
                    } catch (Exception e) {
                        return value.toString();
                    }
                } else {
                    return null;
                }
            }
        });

        treeGrid.setFields(nameField, jobField, salaryField);
        return treeGrid;
    }

    public String getIntro() {
        return DESCRIPTION;
    }
}