com.plr.hanzi.client.view.dictionnary.ZwCharBrowser.java Source code

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Here is the source code for com.plr.hanzi.client.view.dictionnary.ZwCharBrowser.java

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/*
 * Copyright 2010 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.plr.hanzi.client.view.dictionnary;

import com.google.gwt.core.client.GWT;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.user.cellview.client.CellTable;
import com.google.gwt.user.cellview.client.HasKeyboardPagingPolicy.KeyboardPagingPolicy;
import com.google.gwt.user.cellview.client.HasKeyboardSelectionPolicy.KeyboardSelectionPolicy;
import com.google.gwt.user.cellview.client.SimplePager;
import com.google.gwt.user.cellview.client.SimplePager.TextLocation;
import com.google.gwt.user.cellview.client.TextColumn;
import com.google.gwt.user.client.History;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.view.client.Range;
import com.google.gwt.view.client.RangeChangeEvent;
import com.google.gwt.view.client.SelectionChangeEvent;
import com.google.gwt.view.client.SingleSelectionModel;
import com.plr.hanzi.client.ApplicationConst;
import com.plr.hanzi.client.CardData;
import com.plr.hanzi.client.DataControler;
import com.plr.hanzi.client.ZhongWenCharacter;

/**
 * Display all the characters
 */
public class ZwCharBrowser extends Composite {

    interface Binder extends UiBinder<Widget, ZwCharBrowser> {
    }

    private static Binder uiBinder = GWT.create(Binder.class);

    /**
     * The pager used to display the current range.
     */
    @UiField(provided = true)
    SimplePager pager;

    /**
     * The CellList.
     */
    @UiField(provided = true)
    CellTable<ZhongWenCharacter> cellTable;

    private static Range lastAccessedRange = null;

    public ZwCharBrowser() {

        cellTable = new CellTable<ZhongWenCharacter>(CardData.KEY_PROVIDER);

        // Create rank column.
        TextColumn<ZhongWenCharacter> rankColumn = new TextColumn<ZhongWenCharacter>() {
            @Override
            public String getValue(ZhongWenCharacter zwChar) {
                return "" + zwChar.getId();
            }
        };

        TextColumn<ZhongWenCharacter> zhCharColumn = new TextColumn<ZhongWenCharacter>() {
            @Override
            public String getValue(ZhongWenCharacter zwChar) {
                return zwChar.getSimplifiedCharacter();
            }
        };

        cellTable.addColumn(rankColumn, "Rank");
        cellTable.addColumn(zhCharColumn, "Simplified");

        cellTable.setPageSize(getPageSize());
        cellTable.setKeyboardPagingPolicy(KeyboardPagingPolicy.CHANGE_PAGE);
        cellTable.setKeyboardSelectionPolicy(KeyboardSelectionPolicy.BOUND_TO_SELECTION);

        // // Create a Pager to control the table.
        SimplePager.Resources pagerResources = GWT.create(SimplePager.Resources.class);
        pager = new SimplePager(TextLocation.CENTER, pagerResources, false, 0, true);
        pager.setDisplay(cellTable);

        // Add a selection model so we can select cells.
        final SingleSelectionModel<ZhongWenCharacter> selectionModel = new SingleSelectionModel<ZhongWenCharacter>(
                CardData.KEY_PROVIDER);
        cellTable.setSelectionModel(selectionModel);
        selectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler() {

            @Override
            public void onSelectionChange(SelectionChangeEvent event) {
                ZhongWenCharacter zwChar = selectionModel.getSelectedObject();
                History.newItem(ApplicationConst.CHARARCTER + "/" + zwChar.getId());
            }
        });

        // Add the CellList to the data provider in the database.
        DataControler.get().addDataDisplay(cellTable);

        cellTable.addRangeChangeHandler(new RangeChangeEvent.Handler() {
            @Override
            public void onRangeChange(RangeChangeEvent event) {
                lastAccessedRange = event.getNewRange();
            }
        });

        if (lastAccessedRange != null) {
            cellTable.setVisibleRange(lastAccessedRange);
        }

        initWidget(uiBinder.createAndBindUi(this));
    }

    private int getPageSize() {
        return 15;
    }

}