com.github.apetrelli.gwtintegration.cellview.client.widget.PagedTable Maven / Gradle / Ivy

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Additional code to ease development of Cell-based widgets.

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package com.github.apetrelli.gwtintegration.cellview.client.widget;

import java.util.List;
import java.util.Set;

import com.github.apetrelli.gwtintegration.cellview.client.builder.CellTableWithListDataBuilder;
import com.google.gwt.uibinder.client.UiConstructor;
import com.google.gwt.user.cellview.client.CellTable;
import com.google.gwt.user.cellview.client.ColumnSortList;
import com.google.gwt.user.cellview.client.SimplePager;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.view.client.ListDataProvider;
import com.google.gwt.view.client.SelectionModel;
import com.google.gwt.view.client.SetSelectionModel;

public abstract class PagedTable extends Composite {
	
	private ListDataProvider dataProvider;
	
	private Integer defaultSortColumnIndex;
	
	private CellTable dataTable;

	@UiConstructor
	public PagedTable(CellTableWithListDataBuilder tableBuilder) {
		dataProvider = tableBuilder.getDataProvider();
		dataTable = tableBuilder.construct();
		setDataTable(dataTable);
		initWidget();
		tableBuilder.setPager(getPager()).connect();
	}
	
	public void setPageSize(int pageSize) {
		getPager().setPageSize(pageSize);
	}
	
	protected abstract void initWidget();
	
	protected abstract void setDataTable(CellTable dataTable);
	
	protected abstract SimplePager getPager();

	public void setDefaultSortColumnIndex(Integer defaultSortColumnIndex) {
		this.defaultSortColumnIndex = defaultSortColumnIndex;
	}
	
	public void setItems(List persons) {
		List list = dataProvider.getList();
		list.clear();
		if (persons != null) {
			list.addAll(persons);
		}
		SetSelectionModel selectionModel = getSelectionModel();
		if (selectionModel != null) {
			selectionModel.clear();
		}
		dataProvider.flush();
		ColumnSortList sortList = dataTable.getColumnSortList();
		sortList.clear();
		if (defaultSortColumnIndex != null) {
			sortList.push(dataTable.getColumn(defaultSortColumnIndex));
		}
		
		getPager().setDisplay(dataTable);
		getPager().setPage(0);
	}
	
	@SuppressWarnings({ "rawtypes", "unchecked" })
	private SetSelectionModel getSelectionModel() {
		SelectionModel selectionModel = dataTable.getSelectionModel();
		if (selectionModel == null) {
			return null;
		}
		if (selectionModel instanceof SetSelectionModel) {
			return (SetSelectionModel) selectionModel;
		}
		throw new IllegalStateException("The selection model is not a SetSelectionModel");
	}
	
	public Set getSelectedItems() {
		SetSelectionModel selectionModel = getSelectionModel();
		return selectionModel != null ? selectionModel.getSelectedSet() : null;
	}
}