com.google.gwt.sample.showcase.client.content.tables.CwFlexTable.java Source code

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Here is the source code for com.google.gwt.sample.showcase.client.content.tables.CwFlexTable.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.sample.showcase.client.content.tables;

import com.google.gwt.core.client.GWT;
import com.google.gwt.core.client.RunAsyncCallback;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.i18n.client.Constants;
import com.google.gwt.sample.showcase.client.ContentWidget;
import com.google.gwt.sample.showcase.client.Showcase;
import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseData;
import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseSource;
import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseStyle;
import com.google.gwt.user.client.rpc.AsyncCallback;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.FlexTable;
import com.google.gwt.user.client.ui.HasHorizontalAlignment;
import com.google.gwt.user.client.ui.HasVerticalAlignment;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.VerticalPanel;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.user.client.ui.FlexTable.FlexCellFormatter;

/**
 * Example file.
 */
@ShowcaseStyle(".cw-FlexTable")
public class CwFlexTable extends ContentWidget {
    /**
     * The constants used in this Content Widget.
     */
    @ShowcaseSource
    public static interface CwConstants extends Constants {
        String cwFlexTableAddRow();

        String cwFlexTableDescription();

        String cwFlexTableDetails();

        String cwFlexTableName();

        String cwFlexTableRemoveRow();
    }

    /**
     * An instance of the constants.
     */
    @ShowcaseData
    private final CwConstants constants;

    /**
     * Constructor.
     *
     * @param constants the constants
     */
    public CwFlexTable(CwConstants constants) {
        super(constants.cwFlexTableName(), constants.cwFlexTableDescription(), true);
        this.constants = constants;
    }

    /**
     * Initialize this example.
     */
    @ShowcaseSource
    @Override
    public Widget onInitialize() {
        // Create a Flex Table
        final FlexTable flexTable = new FlexTable();
        FlexCellFormatter cellFormatter = flexTable.getFlexCellFormatter();
        flexTable.addStyleName("cw-FlexTable");
        flexTable.setWidth("32em");
        flexTable.setCellSpacing(5);
        flexTable.setCellPadding(3);

        // Add some text
        cellFormatter.setHorizontalAlignment(0, 1, HasHorizontalAlignment.ALIGN_LEFT);
        flexTable.setHTML(0, 0, constants.cwFlexTableDetails());
        cellFormatter.setColSpan(0, 0, 2);

        // Add a button that will add more rows to the table
        Button addRowButton = new Button(constants.cwFlexTableAddRow(), new ClickHandler() {
            public void onClick(ClickEvent event) {
                addRow(flexTable);
            }
        });
        addRowButton.addStyleName("sc-FixedWidthButton");

        Button removeRowButton = new Button(constants.cwFlexTableRemoveRow(), new ClickHandler() {
            public void onClick(ClickEvent event) {
                removeRow(flexTable);
            }
        });
        removeRowButton.addStyleName("sc-FixedWidthButton");
        VerticalPanel buttonPanel = new VerticalPanel();
        buttonPanel.setStyleName("cw-FlexTable-buttonPanel");
        buttonPanel.add(addRowButton);
        buttonPanel.add(removeRowButton);
        flexTable.setWidget(0, 1, buttonPanel);
        cellFormatter.setVerticalAlignment(0, 1, HasVerticalAlignment.ALIGN_TOP);

        // Add two rows to start
        addRow(flexTable);
        addRow(flexTable);

        // Return the panel
        flexTable.ensureDebugId("cwFlexTable");
        return flexTable;
    }

    @Override
    protected void asyncOnInitialize(final AsyncCallback<Widget> callback) {
        GWT.runAsync(CwFlexTable.class, new RunAsyncCallback() {

            public void onFailure(Throwable caught) {
                callback.onFailure(caught);
            }

            public void onSuccess() {
                callback.onSuccess(onInitialize());
            }
        });
    }

    /**
     * Add a row to the flex table.
     */
    @ShowcaseSource
    private void addRow(FlexTable flexTable) {
        int numRows = flexTable.getRowCount();
        flexTable.setWidget(numRows, 0, new Image(Showcase.images.gwtLogo()));
        flexTable.setWidget(numRows, 1, new Image(Showcase.images.gwtLogo()));
        flexTable.getFlexCellFormatter().setRowSpan(0, 1, numRows + 1);
    }

    /**
     * Remove a row from the flex table.
     */
    @ShowcaseSource
    private void removeRow(FlexTable flexTable) {
        int numRows = flexTable.getRowCount();
        if (numRows > 1) {
            flexTable.removeRow(numRows - 1);
            flexTable.getFlexCellFormatter().setRowSpan(0, 1, numRows - 1);
        }
    }
}