com.google.gwt.gen2.demo.scrolltable.client.option.highlight.RowSelectionPolicyOption.java Source code

Introduction

Here is the source code for com.google.gwt.gen2.demo.scrolltable.client.option.highlight.RowSelectionPolicyOption.java

Source

/*
 * Copyright 2008 Google Inc.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package com.google.gwt.gen2.demo.scrolltable.client.option.highlight;

import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.gen2.demo.scrolltable.client.PagingScrollTableDemo;
import com.google.gwt.gen2.demo.scrolltable.client.ScrollTableDemo;
import com.google.gwt.gen2.demo.scrolltable.client.option.AbstractOption;
import com.google.gwt.gen2.demo.scrolltable.client.option.CustomForm;
import com.google.gwt.gen2.table.client.SelectionGrid;
import com.google.gwt.gen2.table.client.SelectionGrid.SelectionPolicy;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Label;
import com.google.gwt.user.client.ui.ListBox;
import com.google.gwt.user.client.ui.Widget;

/**
 * An option.
 */
public class RowSelectionPolicyOption extends AbstractOption {
    private static final String DESC_SELECTION = "Row selection allows the user "
            + "to select one or more rows from the table "
            + "using mouse clicks.  Use the ctrl button to add to the selected rows, "
            + "and use the shift button to select multiple rows in a range.";

    /**
     * The list box used to select the selection policy.
     */
    private ListBox policyBox = null;

    /**
     * The label used to display selection status.
     */
    private Label statusLabel = null;

    @Override
    protected String getDescription() {
        return DESC_SELECTION;
    }

    @Override
    protected Widget onInitialize() {
        CustomForm form = new CustomForm();

        // Add the current status
        statusLabel = new Label();
        form.addLabeledWidget("Selection Status:", statusLabel);

        // Add the current policy
        policyBox = new ListBox();
        policyBox.addItem("Multi Row");
        policyBox.addItem("Single Row");
        policyBox.addItem("Checkboxes");
        policyBox.addItem("Radio Buttons");
        form.addLabeledWidget("Selection Policy:", policyBox);

        // Add button to change policy
        {
            Button button = new Button("Set Selection Policy", new ClickHandler() {
                public void onClick(ClickEvent event) {
                    SelectionGrid grid = ScrollTableDemo.get().getDataTable();
                    switch (policyBox.getSelectedIndex()) {
                    case 0:
                        grid.setSelectionPolicy(SelectionPolicy.MULTI_ROW);
                        break;
                    case 1:
                        grid.setSelectionPolicy(SelectionPolicy.ONE_ROW);
                        break;
                    case 2:
                        grid.setSelectionPolicy(SelectionPolicy.CHECKBOX);
                        break;
                    case 3:
                        grid.setSelectionPolicy(SelectionPolicy.RADIO);
                        break;
                    }
                    PagingScrollTableDemo.get().getPagingScrollTable().reloadPage();
                }
            });
            form.addButton(button);
        }

        // Add button to change status
        {
            Button button = new Button("Toggle Status", new ClickHandler() {
                public void onClick(ClickEvent event) {
                    SelectionGrid grid = ScrollTableDemo.get().getDataTable();
                    grid.setSelectionEnabled(!grid.isSelectionEnabled());
                    refreshPolicy();
                }
            });
            form.addButton(button);
        }

        // Refresh policy and return
        refreshPolicy();
        return form;
    }

    /**
     * Refresh the policy.
     */
    private void refreshPolicy() {
        SelectionGrid grid = ScrollTableDemo.get().getDataTable();

        // Refresh the status
        if (grid.isSelectionEnabled()) {
            statusLabel.setText("enabled");
        } else {
            statusLabel.setText("disabled");
        }

        // Refresh the policy
        SelectionPolicy policy = grid.getSelectionPolicy();
        if (policy == SelectionPolicy.MULTI_ROW) {
            policyBox.setSelectedIndex(0);
        } else if (policy == SelectionPolicy.ONE_ROW) {
            policyBox.setSelectedIndex(1);
        } else if (policy == SelectionPolicy.CHECKBOX) {
            policyBox.setSelectedIndex(2);
        } else if (policy == SelectionPolicy.RADIO) {
            policyBox.setSelectedIndex(3);
        }
    }
}