com.google.gwt.widgetideas.table.client.PreloadedTable.java Source code

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Here is the source code for com.google.gwt.widgetideas.table.client.PreloadedTable.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.widgetideas.table.client;

import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.widgetideas.table.client.overrides.FlexTable;

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

/**
 * A {@link PreloadedTable} allow users to configure a table with HTML cell data
 * before rendering the table. This can lead to faster performance for large
 * tables.
 * 
 * @deprecated Replaced by
 *             {@link com.google.gwt.gen2.table.client.PreloadedTable}
 */
@Deprecated
public class PreloadedTable extends FlexTable {
    List<List<Object>> rows = new ArrayList<List<Object>>();
    boolean isFilledIn = false;

    /*
     * As often users manipulate a single row at a time, caching the current row
     * and index for speed;
     */
    List<Object> curRow;

    int curIndex = -1;

    @Override
    public void setHTML(int row, int column, String html) {
        ensureLoaded();
        super.setHTML(row, column, html);
    }

    /**
     * Sets cells HTML that will be included in the table upon initialization.
     * 
     * @param row row
     * @param column column
     * @param html html to set
     */
    public void setPendingHTML(int row, int column, String html) {
        if (isFilledIn) {
            throw new UnsupportedOperationException(
                    "Cannot call setPendingHTML after either setWidget/setText/setHTML has been called or the table has been attached to the DOM");
        }
        List<Object> l = ensureRow(row);
        ensureCell(l, column, html);
    }

    @Override
    public void setText(int row, int column, String text) {
        ensureLoaded();
        super.setText(row, column, text);
    }

    @Override
    public void setWidget(int row, int column, Widget widget) {
        ensureLoaded();
        super.setWidget(row, column, widget);
    }

    @Override
    protected void onLoad() {
        ensureLoaded();
    }

    private void ensureCell(List<Object> row, int column, String value) {
        if (column == row.size()) {
            row.add(value);
        } else {
            for (int i = row.size(); i < column + 1; i++) {
                row.add("");
            }
            row.set(column, value);
        }
    }

    private void ensureLoaded() {
        if (!isFilledIn) {
            isFilledIn = true;
            new FlexTableBulkRenderer(this).renderRows(rows, null);
        }
    }

    private List<Object> ensureRow(int row) {
        if (row == curIndex) {
            return curRow;
        }
        for (int i = rows.size(); i < row + 1; i++) {
            curRow = new ArrayList<Object>();
            curRow.add("");
            rows.add(curRow);
        }
        curRow = rows.get(row);
        curIndex = row;
        return rows.get(row);
    }
}