ReorderingGridExample.java

package com.extjs.gxt.samples.client.examples.dnd;

import java.util.ArrayList;
import java.util.List;

import com.extjs.gxt.samples.resources.client.Resources;
import com.extjs.gxt.samples.resources.client.TestData;
import com.extjs.gxt.samples.resources.client.model.Stock;
import com.extjs.gxt.ui.client.Style.HorizontalAlignment;
import com.extjs.gxt.ui.client.dnd.GridDragSource;
import com.extjs.gxt.ui.client.dnd.GridDropTarget;
import com.extjs.gxt.ui.client.dnd.DND.Feedback;
import com.extjs.gxt.ui.client.store.ListStore;
import com.extjs.gxt.ui.client.util.Util;
import com.extjs.gxt.ui.client.widget.ContentPanel;
import com.extjs.gxt.ui.client.widget.LayoutContainer;
import com.extjs.gxt.ui.client.widget.grid.ColumnConfig;
import com.extjs.gxt.ui.client.widget.grid.ColumnData;
import com.extjs.gxt.ui.client.widget.grid.ColumnModel;
import com.extjs.gxt.ui.client.widget.grid.Grid;
import com.extjs.gxt.ui.client.widget.grid.GridCellRenderer;
import com.extjs.gxt.ui.client.widget.layout.FitLayout;
import com.extjs.gxt.ui.client.widget.layout.FlowLayout;
import com.extjs.gxt.ui.client.widget.table.NumberCellRenderer;
import com.google.gwt.i18n.client.DateTimeFormat;
import com.google.gwt.i18n.client.NumberFormat;
import com.google.gwt.user.client.Element;

public class ReorderingGridExample extends LayoutContainer {

  @SuppressWarnings("unchecked")
  @Override
  protected void onRender(Element parent, int index) {
    super.onRender(parent, index);
    
    setLayout(new FlowLayout(10));

    final NumberFormat currency = NumberFormat.getCurrencyFormat();
    final NumberFormat number = NumberFormat.getFormat("0.00");
    final NumberCellRenderer<Grid<Stock>> numberRenderer = new NumberCellRenderer<Grid<Stock>>(
        currency);

    GridCellRenderer<Stock> change = new GridCellRenderer<Stock>() {
      public String render(Stock model, String property, ColumnData config, int rowIndex,
          int colIndex, ListStore<Stock> store, Grid<Stock> grid) {
        double val = (Double) model.get(property);
        String style = val < 0 ? "red" : "green";
        return "<span style='color:" + style + "'>" + number.format(val) + "</span>";
      }
    };

    GridCellRenderer<Stock> gridNumber = new GridCellRenderer<Stock>() {
      public String render(Stock model, String property, ColumnData config, int rowIndex,
          int colIndex, ListStore<Stock> store, Grid<Stock> grid) {
        return numberRenderer.render(null, property, model.get(property));
      }
    };

    List<ColumnConfig> configs = new ArrayList<ColumnConfig>();

    ColumnConfig column = new ColumnConfig();
    column.setId("name");
    column.setSortable(false);
    column.setHeader("Company");
    column.setWidth(200);
    configs.add(column);

    column = new ColumnConfig();
    column.setId("symbol");
    column.setHeader("Symbol");
    column.setWidth(100);
    configs.add(column);

    column = new ColumnConfig();
    column.setId("last");
    column.setHeader("Last");
    column.setAlignment(HorizontalAlignment.END);
    column.setWidth(75);
    column.setRenderer(gridNumber);
    configs.add(column);

    column = new ColumnConfig("change", "Change", 100);
    column.setAlignment(HorizontalAlignment.END);
    column.setRenderer(change);
    configs.add(column);

    column = new ColumnConfig("date", "Last Updated", 100);
    column.setAlignment(HorizontalAlignment.END);
    column.setDateTimeFormat(DateTimeFormat.getShortDateFormat());
    configs.add(column);

    ListStore<Stock> store = new ListStore<Stock>();
    store.add(Util.subList(TestData.getStocks(), 0, 12));

    ColumnModel cm = new ColumnModel(configs);

    ContentPanel cp = new ContentPanel();
    cp.setBodyBorder(false);
    cp.setIcon(Resources.ICONS.table());
    cp.setHeading("Reordering Grid");
    cp.setButtonAlign(HorizontalAlignment.CENTER);
    cp.setLayout(new FitLayout());
    cp.setSize(600, 304);

    Grid<Stock> grid = new Grid<Stock>(store, cm);
    grid.setStyleAttribute("borderTop", "none");
    grid.setAutoExpandColumn("name");
    grid.setBorders(true);
    grid.setStripeRows(true);
    cp.add(grid);
    
    new GridDragSource(grid);
    
    GridDropTarget target = new GridDropTarget(grid);
    target.setAllowSelfAsSource(true);
    target.setFeedback(Feedback.INSERT);
    

    add(cp);
  }
}