workspace-explorer/src/main/java/org/gcube/portlets/widgets/wsexplorer/client/view/grid/ItemsTable.java

/**
 * 
 */
package org.gcube.portlets.widgets.wsexplorer.client.view.grid;

import java.util.Arrays;
import java.util.Comparator;
import java.util.HashSet;
import java.util.List;
import java.util.Set;

import org.gcube.portlets.widgets.wsexplorer.client.Util;
import org.gcube.portlets.widgets.wsexplorer.client.view.SelectionItem;
import org.gcube.portlets.widgets.wsexplorer.shared.Item;

import com.github.gwtbootstrap.client.ui.Pagination;
import com.google.gwt.cell.client.ButtonCell;
import com.google.gwt.cell.client.Cell.Context;
import com.google.gwt.cell.client.ImageResourceCell;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.resources.client.ImageResource;
import com.google.gwt.safehtml.shared.SafeHtml;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.safehtml.shared.SafeHtmlUtils;
import com.google.gwt.user.cellview.client.AbstractCellTable;
import com.google.gwt.user.cellview.client.Column;
import com.google.gwt.user.cellview.client.ColumnSortEvent.ListHandler;
import com.google.gwt.user.cellview.client.SimplePager;
import com.google.gwt.user.cellview.client.TextColumn;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.Label;
/**
 * The Class PackagesTable.
 *
 * @author Francesco Mangiacrapa francesco.mangiacrapa@isti.cnr.it
 * Feb 19, 2015
 */
public class ItemsTable extends AbstractItemsCellTable implements SelectionItem{
	
	private Column<Item, ImageResource> icon;
	private TextColumn<Item> name;
	private TextColumn<Item> owner;
	private Item selectedItem = null;
	public static enum DISPLAY_FIELD{ICON, NAME, OWNER};
	private List<DISPLAY_FIELD> displayFields;

	/**
	 * Instantiates a new items table.
	 */
	public ItemsTable(boolean showMoreInfo, DISPLAY_FIELD[] fields) {
		super(showMoreInfo);
		setDisplayFields(fields);
		initTable(cellTable, null, null);
	}

	/* (non-Javadoc)
	 * @see org.gcube.portlets.admin.gcubereleases.client.view.AbstractPackageTable#addPackages(java.util.List)
	 */
	public void addItems(List<Item> packages) {
		dataProvider.getList().clear();

		for (Item pckg : packages)
			addItem(pckg);

		cellTable.setPageSize(packages.size()+1);
		cellTable.redraw();
	}

	/**
	 * Adds the package.
	 *
	 * @param pckg the pckg
	 */
	private void addItem(Item pckg) {
		dataProvider.getList().add(pckg);
		dataProvider.flush();
		dataProvider.refresh();
	}

	/* (non-Javadoc)
	 * @see org.gcube.portlets.admin.gcubereleases.client.view.AbstractPackageTable#initTable(com.google.gwt.user.cellview.client.AbstractCellTable, com.google.gwt.user.cellview.client.SimplePager, com.github.gwtbootstrap.client.ui.Pagination)
	 */
	@Override
	public void initTable(final AbstractCellTable<Item> packageTable, final SimplePager pager, final Pagination pagination) {
		packageTable.setEmptyTableWidget(new Label("No data."));

		//ICONS
	    ImageResourceCell iconResourceCell = new ImageResourceCell() {
	        public Set<String> getConsumedEvents() {
	            HashSet<String> events = new HashSet<String>();
	            events.add("click");
	            return events;
	        }
	    };

	    if(this.displayFields.contains(DISPLAY_FIELD.ICON)){
		    icon = new Column<Item, ImageResource>(iconResourceCell) {
		        @Override
		        public ImageResource getValue(Item dataObj) {
		        	return Util.getImage(dataObj);
		        }
		        /* (non-Javadoc)
		         * @see com.google.gwt.user.cellview.client.Column#render(com.google.gwt.cell.client.Cell.Context, java.lang.Object, com.google.gwt.safehtml.shared.SafeHtmlBuilder)
		         */
		        @Override
		        public void render(Context context, Item object, SafeHtmlBuilder sb) {
		        	super.render(context, object, sb);
		        	
		        }
		    };
		    icon.setSortable(false);
			packageTable.addColumn(icon, "");
		    packageTable.setColumnWidth(icon, 10.0, Unit.PCT);
	    }
	    
	    if(this.displayFields.contains(DISPLAY_FIELD.NAME)){
			//ARTIFACT ID
			name = new TextColumn<Item>() {
				@Override
				public String getValue(Item object) {
					return object.getName();
				}
			};
			name.setSortable(true);

			packageTable.addColumn(name, "Name");
			
			double width = displayFields.size()>1?50:90;
			packageTable.setColumnWidth(name, width, Unit.PCT);
			
			ListHandler<Item> nameColumnHandler = new ListHandler<Item>(dataProvider.getList());
			nameColumnHandler.setComparator(name, new Comparator<Item>() {
				@Override
				public int compare(Item o1, Item o2) {
					return o1.getName().compareTo(o2.getName());
				}
			});
			
			packageTable.addColumnSortHandler(nameColumnHandler);
		
	    }
		
	    if(this.displayFields.contains(DISPLAY_FIELD.OWNER)){
	    	
			owner = new TextColumn<Item>() {
				@Override
				public String getValue(Item object) {
					return object.getOwner() != null ? object.getOwner() : "";
				}
			};
			
			owner.setSortable(true);
			packageTable.addColumn(owner, "Owner");
			double width = (displayFields.size()==2) ?90:40;
			packageTable.setColumnWidth(owner, width, Unit.PCT);
			
			ListHandler<Item> ownerColumnHandler = new ListHandler<Item>(dataProvider.getList());
			ownerColumnHandler.setComparator(owner, new Comparator<Item>() {
				@Override
				public int compare(Item o1, Item o2) {
					return o1.getOwner().compareTo(o2.getOwner());
				}
			});
			packageTable.addColumnSortHandler(ownerColumnHandler);
		
	    }
		
		/*final SingleSelectionModel<Item> selectionModel = new SingleSelectionModel<Item>();
		selectionModel.addSelectionChangeHandler(new Handler() {
			@Override
			public void onSelectionChange(SelectionChangeEvent event) {
			}
		});*/
	}
	
	/**
	 * @param displayFields the dispalyFields to set
	 */
	public void setDisplayFields(DISPLAY_FIELD[] fields) {
		this.displayFields = (fields!=null && fields.length>0)?Arrays.asList(fields):Arrays.asList(DISPLAY_FIELD.values());
	}

	/**
	 * @return the displayFields
	 */
	public List<DISPLAY_FIELD> getDisplayFields() {
		return displayFields;
	}
	
	public class ButtonImageCell extends ButtonCell{

	    @Override
	    public void render(com.google.gwt.cell.client.Cell.Context context, 
	            String value, SafeHtmlBuilder sb) {
	        SafeHtml html = SafeHtmlUtils.fromTrustedString(new Image(value).toString());
	        sb.append(html);
	    }
	}

	/* (non-Javadoc)
	 * @see org.gcube.portlets.widgets.wsexplorer.client.notification.SelectionItemHandler#getSelectionItem()
	 */
	@Override
	public Item getSelectedItem() {
		return ssm.getSelectedObject();
	}
}