/*
* Smart GWT (GWT for SmartClient)
* Copyright 2008 and beyond, Isomorphic Software, Inc.
*
* Smart GWT is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License version 3
* is published by the Free Software Foundation. Smart GWT is also
* available under typical commercial license terms - see
* http://smartclient.com/license
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
package com.smartgwt.sample.showcase.client.grid;
import com.google.gwt.i18n.client.NumberFormat;
import com.smartgwt.client.data.DataSource;
import com.smartgwt.client.data.Record;
import com.smartgwt.client.types.Alignment;
import com.smartgwt.client.types.GroupStartOpen;
import com.smartgwt.client.types.RecordSummaryFunctionType;
import com.smartgwt.client.types.SummaryFunctionType;
import com.smartgwt.client.widgets.Canvas;
import com.smartgwt.client.widgets.grid.*;
import com.smartgwt.sample.showcase.client.PanelFactory;
import com.smartgwt.sample.showcase.client.ShowcasePanel;
import com.smartgwt.sample.showcase.client.data.OrderItem;
import com.smartgwt.sample.showcase.client.data.OrderItemLocalDS;
import java.util.HashSet;
import java.util.Set;
public class GridSummariesInHeaderSample extends ShowcasePanel {
private static final String DESCRIPTION =
"<p>ListGrids support displaying summaries of the current data set in various ways:</p>" +
"<p>Fields from individual records can be summarized into a single field value. In this example the \"Total\" " +
"field displays a summary value calculated by multiplying the \"Quantity\" and \"Price\" fields.</p>" +
"<p>Summaries can also be displayed for multiple records. This example shows a summary row at the end of each " +
"group in the grid as well as an overall summary row with information about every record in the grid. Note that in " +
"addition to standard summary functions such as \"sum\" to generate a total, or \"count\" to generate a count of records, " +
"completely custom functions may be used. This is demonstrated in the \"Category\" field where a custom function determines " +
"how many categories exist in this dataset.</p>" +
"<p>As illustrated in this sample, by calling listGrid.setShowGroupSummaryInHeader(true) field summary values for each group are displayed directly " +
"in the group header node, rather than showing up at the bottom of each expanded group</p>";
public static class Factory implements PanelFactory {
private String id;
public Canvas create() {
GridSummariesInHeaderSample panel = new GridSummariesInHeaderSample();
id = panel.getID();
return panel;
}
public String getID() {
return id;
}
public String getDescription() {
return DESCRIPTION;
}
}
public Canvas getViewPanel() {
DataSource dataSource = OrderItemLocalDS.getInstance();
ListGridField orderIdField = new ListGridField("orderID");
orderIdField.setIncludeInRecordSummary(false);
orderIdField.setSummaryFunction(SummaryFunctionType.COUNT);
ListGridField itemDescriptionField = new ListGridField("itemDescription");
ListGridField categoryField = new ListGridField("category");
categoryField.setShowGridSummary(true);
categoryField.setSummaryFunction(new SummaryFunction() {
public Object getSummaryValue(Record[] records, ListGridField field) {
Set<String> uniqueCategories = new HashSet<String>();
for (int i = 0; i < records.length; i++) {
Record record = records[i];
uniqueCategories.add(((OrderItem) record).getCategory());
}
return uniqueCategories.size() + " Categories";
}
});
ListGridField shipDateField = new ListGridField("shipDate");
shipDateField.setShowGroupSummary(true);
shipDateField.setShowGridSummary(false);
shipDateField.setSummaryFunction(SummaryFunctionType.MAX);
ListGridField quantityField = new ListGridField("quantity");
quantityField.setShowGroupSummary(false);
quantityField.setShowGridSummary(false);
ListGridField unitPriceField = new ListGridField("unitPrice");
unitPriceField.setAlign(Alignment.RIGHT);
unitPriceField.setCellFormatter(new CellFormatter() {
public String format(Object value, ListGridRecord record, int rowNum, int colNum) {
if (value == null) return null;
try {
NumberFormat nf = NumberFormat.getFormat("#,##0.00");
return "$" + nf.format(((Number) value).doubleValue());
} catch (Exception e) {
return value.toString();
}
}
});
unitPriceField.setShowGroupSummary(false);
unitPriceField.setShowGridSummary(false);
ListGridSummaryField totalField = new ListGridSummaryField("total", "Total");
totalField.setAlign(Alignment.RIGHT);
totalField.setRecordSummaryFunction(RecordSummaryFunctionType.MULTIPLIER);
totalField.setSummaryFunction(SummaryFunctionType.SUM);
totalField.setShowGridSummary(true);
totalField.setShowGroupSummary(true);
totalField.setCellFormatter(new CellFormatter() {
public String format(Object value, ListGridRecord record, int rowNum, int colNum) {
if (value == null) return null;
try {
NumberFormat nf = NumberFormat.getFormat("#,##0.00");
return "$" + nf.format(((Number) value).doubleValue());
} catch (Exception e) {
return value.toString();
}
}
});
final ListGrid listGrid = new ListGrid();
listGrid.setWidth(600);
listGrid.setHeight(520);
listGrid.setAutoFetchData(true);
listGrid.setShowAllRecords(true);
listGrid.setDataSource(dataSource);
listGrid.setCanEdit(true);
listGrid.setGroupByField("category");
listGrid.setGroupStartOpen(GroupStartOpen.ALL);
listGrid.setShowGridSummary(true);
listGrid.setShowGroupSummary(true);
listGrid.setShowGroupSummaryInHeader(true);
listGrid.setFields(orderIdField, itemDescriptionField, categoryField, shipDateField, quantityField, unitPriceField, totalField);
return listGrid;
}
public String getIntro() {
return DESCRIPTION;
}
}