com.google.gwt.gen2.demo.scrolltable.client.option.paging.HideColumnOption.java Source code

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

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/*
 * 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.paging;

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.StudentColumnDefinition;
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.demo.scrolltable.shared.Student;
import com.google.gwt.gen2.table.client.DefaultTableDefinition;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.Widget;

/**
 * An option.
 */
public class HideColumnOption extends AbstractOption {
    @Override
    protected String getDescription() {
        return "Hide or show columns";
    }

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

        final DefaultTableDefinition<Student> tableDef = PagingScrollTableDemo.get().getTableDefinition();
        int numColumns = tableDef.getColumnDefinitionCount();
        for (int i = 0; i < numColumns; i++) {
            final StudentColumnDefinition<?> colDef = (StudentColumnDefinition<?>) tableDef.getColumnDefinition(i);
            final Button button = new Button("Hide Column");
            button.addClickHandler(new ClickHandler() {
                public void onClick(ClickEvent event) {
                    if (tableDef.isColumnVisible(colDef)) {
                        tableDef.setColumnVisible(colDef, false);
                        button.setText("Show Column");
                    } else {
                        tableDef.setColumnVisible(colDef, true);
                        button.setText("Hide Column");
                    }
                    PagingScrollTableDemo.get().getPagingScrollTable().reloadPage();
                }
            });
            form.addLabeledWidget(colDef.getHeader(0).toString(), button);
        }

        // Add the description
        return form;
    }
}