Created
November 9, 2012 16:25
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| package org.lazan.t5components.components; | |
| import java.util.ArrayList; | |
| import java.util.Iterator; | |
| import java.util.List; | |
| import org.apache.tapestry5.Block; | |
| import org.apache.tapestry5.annotations.InjectComponent; | |
| import org.apache.tapestry5.annotations.OnEvent; | |
| import org.apache.tapestry5.annotations.Parameter; | |
| import org.apache.tapestry5.annotations.Property; | |
| import org.apache.tapestry5.annotations.SetupRender; | |
| import org.apache.tapestry5.corelib.components.Zone; | |
| import org.lazan.t5components.model.GalleryDataModel; | |
| public class Gallery<T> { | |
| @Parameter(required=true) | |
| @Property | |
| private GalleryDataModel<T> source; | |
| @Parameter(required=true) | |
| private int columnCount; | |
| @Parameter("prop:source.size()") | |
| private Integer pageSize; | |
| @Parameter("block:defaultValueBlock") | |
| @Property | |
| private Block valueBlock; | |
| @Property | |
| private int currentPage; | |
| @Property | |
| private List<T> row; | |
| @Parameter | |
| @Property | |
| private T value; | |
| @InjectComponent | |
| private Zone galleryZone; | |
| @SetupRender | |
| void setupRender() { | |
| currentPage = 0; | |
| } | |
| public List<List<T>> getRows() { | |
| int startIndex = currentPage * pageSize; | |
| Iterator<T> iterator = source.getItems(startIndex, pageSize).iterator(); | |
| List<List<T>> rows = new ArrayList<List<T>>(); | |
| while (iterator.hasNext()) { | |
| List<T> row = new ArrayList<T>(columnCount); | |
| for (int i = 0; i < columnCount; ++ i) { | |
| if (iterator.hasNext()) { | |
| row.add(iterator.next()); | |
| } else { | |
| break; | |
| } | |
| } | |
| rows.add(row); | |
| } | |
| return rows; | |
| } | |
| public int getNextPage() { | |
| return currentPage + 1; | |
| } | |
| public int getPrevPage() { | |
| return currentPage - 1; | |
| } | |
| public boolean isShowNext() { | |
| int nextIndex = (currentPage + 1) * pageSize; | |
| return nextIndex < source.size(); | |
| } | |
| public boolean isShowPrev() { | |
| return currentPage > 0; | |
| } | |
| @OnEvent("changePage") | |
| public Block onChangePage(int page) { | |
| currentPage = page; | |
| return galleryZone.getBody(); | |
| } | |
| } |
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| <t:zone t:id="galleryZone" xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd"> | |
| <t:block t:id="defaultValueBlock"> | |
| ${value} | |
| </t:block> | |
| <table> | |
| <tbody> | |
| <tr t:type="loop" source="rows" value="row"> | |
| <td t:type="loop" source="row" value="value"> | |
| <t:delegate to="valueBlock" /> | |
| </td> | |
| </tr> | |
| </tbody> | |
| </table> | |
| <div class="galleryControls"> | |
| <t:if test="showPrev"> | |
| <t:eventlink event="changePage" context="prevPage" zone="^"><button>${message:prevPage}</button></t:eventlink> | |
| </t:if> | |
| <t:if test="showNext"> | |
| <t:eventlink event="changePage" context="nextPage" zone="^"><button>${message:nextPage}</button></t:eventlink> | |
| </t:if> | |
| </div> | |
| </t:zone> |
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| package org.lazan.t5components.model; | |
| import java.util.List; | |
| public interface GalleryDataModel<T> { | |
| int size(); | |
| List<T> getItems(int startIndex, int maxItems); | |
| } |
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| package org.lazan.t5components.demo.pages; | |
| import java.util.ArrayList; | |
| import java.util.List; | |
| import org.apache.tapestry5.Asset; | |
| import org.apache.tapestry5.annotations.Property; | |
| import org.apache.tapestry5.ioc.annotations.Inject; | |
| import org.apache.tapestry5.services.AssetSource; | |
| import org.lazan.t5components.model.GalleryDataModel; | |
| public class GalleryDemo { | |
| @Inject | |
| private AssetSource assetSource; | |
| @Property | |
| private Asset image; | |
| public GalleryDataModel<Asset> getImages() { | |
| return new GalleryDataModel<Asset>() { | |
| public int size() { | |
| return 15; | |
| } | |
| public List<Asset> getItems(int startIndex, int maxItems) { | |
| List<Asset> assets = new ArrayList<Asset>(); | |
| int itemCount = Math.min(size() - startIndex, maxItems); | |
| for (int i = 0; i < itemCount; ++ i) { | |
| String path = String.format("images/%s.jpg", i + startIndex); | |
| assets.add(assetSource.getContextAsset(path, null)); | |
| } | |
| return assets; | |
| } | |
| }; | |
| } | |
| } |
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| <html xmlns:t="http://tapestry.apache.org/schema/tapestry_5_0_0.xsd" xmlns:p="tapestry:parameter"> | |
| <t:lazan.gallery source="images" columnCount="literal:3" pageSize="literal:6" value="image"> | |
| <p:valueBlock> | |
| <img src="${image}" /> | |
| </p:valueBlock> | |
| </t:lazan.gallery> | |
| </html> |
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