2.4/samples/showcase/src/com/google/gwt/sample/showcase/client/content/cell/CwDataGrid.java - gwt - Git at Google

 /*
  * Copyright 2011 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.sample.showcase.client.content.cell;

 import com.google.gwt.cell.client.CheckboxCell;
 import com.google.gwt.cell.client.EditTextCell;
 import com.google.gwt.cell.client.FieldUpdater;
 import com.google.gwt.cell.client.NumberCell;
 import com.google.gwt.cell.client.SelectionCell;
 import com.google.gwt.cell.client.TextCell;
 import com.google.gwt.core.client.GWT;
 import com.google.gwt.core.client.RunAsyncCallback;
 import com.google.gwt.dom.client.Style.Unit;
 import com.google.gwt.i18n.client.Constants;
 import com.google.gwt.safehtml.shared.SafeHtmlUtils;
 import com.google.gwt.sample.showcase.client.ContentWidget;
 import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseData;
 import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseRaw;
 import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseSource;
 import com.google.gwt.sample.showcase.client.content.cell.ContactDatabase.Category;
 import com.google.gwt.sample.showcase.client.content.cell.ContactDatabase.ContactInfo;
 import com.google.gwt.uibinder.client.UiBinder;
 import com.google.gwt.uibinder.client.UiField;
 import com.google.gwt.user.cellview.client.Column;
 import com.google.gwt.user.cellview.client.ColumnSortEvent.ListHandler;
 import com.google.gwt.user.cellview.client.DataGrid;
 import com.google.gwt.user.cellview.client.Header;
 import com.google.gwt.user.cellview.client.SafeHtmlHeader;
 import com.google.gwt.user.cellview.client.SimplePager;
 import com.google.gwt.user.cellview.client.SimplePager.TextLocation;
 import com.google.gwt.user.client.rpc.AsyncCallback;
 import com.google.gwt.user.client.ui.Label;
 import com.google.gwt.user.client.ui.Widget;
 import com.google.gwt.view.client.DefaultSelectionEventManager;
 import com.google.gwt.view.client.MultiSelectionModel;
 import com.google.gwt.view.client.SelectionModel;

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

 /**
  * Example file.
  */
 @ShowcaseRaw({"ContactDatabase.java", "CwDataGrid.ui.xml"})
 public class CwDataGrid extends ContentWidget {

   /**
    * The UiBinder interface used by this example.
    */
   @ShowcaseSource
   interface Binder extends UiBinder<Widget, CwDataGrid> {
   }

   /**
    * The constants used in this Content Widget.
    */
   @ShowcaseSource
   public static interface CwConstants extends Constants {
     String cwDataGridColumnAddress();

     String cwDataGridColumnAge();

     String cwDataGridColumnCategory();

     String cwDataGridColumnFirstName();

     String cwDataGridColumnLastName();

     String cwDataGridDescription();

     String cwDataGridEmpty();

     String cwDataGridName();
   }

   /**
    * The main DataGrid.
    */
   @ShowcaseData
   @UiField(provided = true)
   DataGrid<ContactInfo> dataGrid;

   /**
    * The pager used to change the range of data.
    */
   @ShowcaseData
   @UiField(provided = true)
   SimplePager pager;

   /**
    * An instance of the constants.
    */
   @ShowcaseData
   private final CwConstants constants;

   /**
    * Constructor.
    *
    * @param constants the constants
    */
   public CwDataGrid(CwConstants constants) {
     super(constants.cwDataGridName(), constants.cwDataGridDescription(), false,
         "ContactDatabase.java", "CwDataGrid.ui.xml");
     this.constants = constants;
   }

   @Override
   public boolean hasMargins() {
     return false;
   }

   @Override
   public boolean hasScrollableContent() {
     return false;
   }

   /**
    * Initialize this example.
    */
   @ShowcaseSource
   @Override
   public Widget onInitialize() {
     // Create a DataGrid.

     // Set a key provider that provides a unique key for each contact. If key is
     // used to identify contacts when fields (such as the name and address)
     // change.
     dataGrid = new DataGrid<ContactInfo>(ContactDatabase.ContactInfo.KEY_PROVIDER);
     dataGrid.setWidth("100%");

     // Set the message to display when the table is empty.
     dataGrid.setEmptyTableWidget(new Label(constants.cwDataGridEmpty()));

     // Attach a column sort handler to the ListDataProvider to sort the list.
     ListHandler<ContactInfo> sortHandler =
         new ListHandler<ContactInfo>(ContactDatabase.get().getDataProvider().getList());
     dataGrid.addColumnSortHandler(sortHandler);

     // 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(dataGrid);

     // Add a selection model so we can select cells.
     final SelectionModel<ContactInfo> selectionModel =
         new MultiSelectionModel<ContactInfo>(ContactDatabase.ContactInfo.KEY_PROVIDER);
     dataGrid.setSelectionModel(selectionModel, DefaultSelectionEventManager
         .<ContactInfo> createCheckboxManager());

     // Initialize the columns.
     initTableColumns(selectionModel, sortHandler);

     // Add the CellList to the adapter in the database.
     ContactDatabase.get().addDataDisplay(dataGrid);

     // Create the UiBinder.
     Binder uiBinder = GWT.create(Binder.class);
     return uiBinder.createAndBindUi(this);
   }

   @Override
   protected void asyncOnInitialize(final AsyncCallback<Widget> callback) {
     GWT.runAsync(CwDataGrid.class, new RunAsyncCallback() {

       public void onFailure(Throwable caught) {
         callback.onFailure(caught);
       }

       public void onSuccess() {
         callback.onSuccess(onInitialize());
       }
     });
   }

   /**
    * Add the columns to the table.
    */
   @ShowcaseSource
   private void initTableColumns(final SelectionModel<ContactInfo> selectionModel,
       ListHandler<ContactInfo> sortHandler) {
     // Checkbox column. This table will uses a checkbox column for selection.
     // Alternatively, you can call dataGrid.setSelectionEnabled(true) to enable
     // mouse selection.
     Column<ContactInfo, Boolean> checkColumn =
         new Column<ContactInfo, Boolean>(new CheckboxCell(true, false)) {
           @Override
           public Boolean getValue(ContactInfo object) {
             // Get the value from the selection model.
             return selectionModel.isSelected(object);
           }
         };
     dataGrid.addColumn(checkColumn, SafeHtmlUtils.fromSafeConstant("<br/>"));
     dataGrid.setColumnWidth(checkColumn, 40, Unit.PX);

     // First name.
     Column<ContactInfo, String> firstNameColumn =
         new Column<ContactInfo, String>(new EditTextCell()) {
           @Override
           public String getValue(ContactInfo object) {
             return object.getFirstName();
           }
         };
     firstNameColumn.setSortable(true);
     sortHandler.setComparator(firstNameColumn, new Comparator<ContactInfo>() {
       public int compare(ContactInfo o1, ContactInfo o2) {
         return o1.getFirstName().compareTo(o2.getFirstName());
       }
     });
     dataGrid.addColumn(firstNameColumn, constants.cwDataGridColumnFirstName());
     firstNameColumn.setFieldUpdater(new FieldUpdater<ContactInfo, String>() {
       public void update(int index, ContactInfo object, String value) {
         // Called when the user changes the value.
         object.setFirstName(value);
         ContactDatabase.get().refreshDisplays();
       }
     });
     dataGrid.setColumnWidth(firstNameColumn, 20, Unit.PCT);

     // Last name.
     Column<ContactInfo, String> lastNameColumn =
         new Column<ContactInfo, String>(new EditTextCell()) {
           @Override
           public String getValue(ContactInfo object) {
             return object.getLastName();
           }
         };
     lastNameColumn.setSortable(true);
     sortHandler.setComparator(lastNameColumn, new Comparator<ContactInfo>() {
       public int compare(ContactInfo o1, ContactInfo o2) {
         return o1.getLastName().compareTo(o2.getLastName());
       }
     });
     dataGrid.addColumn(lastNameColumn, constants.cwDataGridColumnLastName());
     lastNameColumn.setFieldUpdater(new FieldUpdater<ContactInfo, String>() {
       public void update(int index, ContactInfo object, String value) {
         // Called when the user changes the value.
         object.setLastName(value);
         ContactDatabase.get().refreshDisplays();
       }
     });
     dataGrid.setColumnWidth(lastNameColumn, 20, Unit.PCT);

     // Age.
     Column<ContactInfo, Number> ageColumn = new Column<ContactInfo, Number>(new NumberCell()) {
       @Override
       public Number getValue(ContactInfo object) {
         return object.getAge();
       }
     };
     lastNameColumn.setSortable(true);
     sortHandler.setComparator(ageColumn, new Comparator<ContactInfo>() {
       public int compare(ContactInfo o1, ContactInfo o2) {
         return o1.getBirthday().compareTo(o2.getBirthday());
       }
     });
     Header<String> ageFooter = new Header<String>(new TextCell()) {
       @Override
       public String getValue() {
         List<ContactInfo> items = dataGrid.getVisibleItems();
         if (items.size() == 0) {
           return "";
         } else {
           int totalAge = 0;
           for (ContactInfo item : items) {
             totalAge += item.getAge();
           }
           return "Avg: " + totalAge / items.size();
         }
       }
     };
     dataGrid.addColumn(ageColumn, new SafeHtmlHeader(SafeHtmlUtils.fromSafeConstant(constants
         .cwDataGridColumnAge())), ageFooter);
     dataGrid.setColumnWidth(ageColumn, 7, Unit.EM);

     // Category.
     final Category[] categories = ContactDatabase.get().queryCategories();
     List<String> categoryNames = new ArrayList<String>();
     for (Category category : categories) {
       categoryNames.add(category.getDisplayName());
     }
     SelectionCell categoryCell = new SelectionCell(categoryNames);
     Column<ContactInfo, String> categoryColumn = new Column<ContactInfo, String>(categoryCell) {
       @Override
       public String getValue(ContactInfo object) {
         return object.getCategory().getDisplayName();
       }
     };
     dataGrid.addColumn(categoryColumn, constants.cwDataGridColumnCategory());
     categoryColumn.setFieldUpdater(new FieldUpdater<ContactInfo, String>() {
       public void update(int index, ContactInfo object, String value) {
         for (Category category : categories) {
           if (category.getDisplayName().equals(value)) {
             object.setCategory(category);
           }
         }
         ContactDatabase.get().refreshDisplays();
       }
     });
     dataGrid.setColumnWidth(categoryColumn, 130, Unit.PX);

     // Address.
     Column<ContactInfo, String> addressColumn = new Column<ContactInfo, String>(new TextCell()) {
       @Override
       public String getValue(ContactInfo object) {
         return object.getAddress();
       }
     };
     addressColumn.setSortable(true);
     sortHandler.setComparator(addressColumn, new Comparator<ContactInfo>() {
       public int compare(ContactInfo o1, ContactInfo o2) {
         return o1.getAddress().compareTo(o2.getAddress());
       }
     });
     dataGrid.addColumn(addressColumn, constants.cwDataGridColumnAddress());
     dataGrid.setColumnWidth(addressColumn, 60, Unit.PCT);
   }
 }
	/*
	* Copyright 2011 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.sample.showcase.client.content.cell;

	import com.google.gwt.cell.client.CheckboxCell;
	import com.google.gwt.cell.client.EditTextCell;
	import com.google.gwt.cell.client.FieldUpdater;
	import com.google.gwt.cell.client.NumberCell;
	import com.google.gwt.cell.client.SelectionCell;
	import com.google.gwt.cell.client.TextCell;
	import com.google.gwt.core.client.GWT;
	import com.google.gwt.core.client.RunAsyncCallback;
	import com.google.gwt.dom.client.Style.Unit;
	import com.google.gwt.i18n.client.Constants;
	import com.google.gwt.safehtml.shared.SafeHtmlUtils;
	import com.google.gwt.sample.showcase.client.ContentWidget;
	import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseData;
	import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseRaw;
	import com.google.gwt.sample.showcase.client.ShowcaseAnnotations.ShowcaseSource;
	import com.google.gwt.sample.showcase.client.content.cell.ContactDatabase.Category;
	import com.google.gwt.sample.showcase.client.content.cell.ContactDatabase.ContactInfo;
	import com.google.gwt.uibinder.client.UiBinder;
	import com.google.gwt.uibinder.client.UiField;
	import com.google.gwt.user.cellview.client.Column;
	import com.google.gwt.user.cellview.client.ColumnSortEvent.ListHandler;
	import com.google.gwt.user.cellview.client.DataGrid;
	import com.google.gwt.user.cellview.client.Header;
	import com.google.gwt.user.cellview.client.SafeHtmlHeader;
	import com.google.gwt.user.cellview.client.SimplePager;
	import com.google.gwt.user.cellview.client.SimplePager.TextLocation;
	import com.google.gwt.user.client.rpc.AsyncCallback;
	import com.google.gwt.user.client.ui.Label;
	import com.google.gwt.user.client.ui.Widget;
	import com.google.gwt.view.client.DefaultSelectionEventManager;
	import com.google.gwt.view.client.MultiSelectionModel;
	import com.google.gwt.view.client.SelectionModel;

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

	/**
	* Example file.
	*/
	@ShowcaseRaw({"ContactDatabase.java", "CwDataGrid.ui.xml"})
	public class CwDataGrid extends ContentWidget {

	/**
	* The UiBinder interface used by this example.
	*/
	@ShowcaseSource
	interface Binder extends UiBinder<Widget, CwDataGrid> {
	}

	/**
	* The constants used in this Content Widget.
	*/
	@ShowcaseSource
	public static interface CwConstants extends Constants {
	String cwDataGridColumnAddress();

	String cwDataGridColumnAge();

	String cwDataGridColumnCategory();

	String cwDataGridColumnFirstName();

	String cwDataGridColumnLastName();

	String cwDataGridDescription();

	String cwDataGridEmpty();

	String cwDataGridName();
	}

	/**
	* The main DataGrid.
	*/
	@ShowcaseData
	@UiField(provided = true)
	DataGrid<ContactInfo> dataGrid;

	/**
	* The pager used to change the range of data.
	*/
	@ShowcaseData
	@UiField(provided = true)
	SimplePager pager;

	/**
	* An instance of the constants.
	*/
	@ShowcaseData
	private final CwConstants constants;

	/**
	* Constructor.
	*
	* @param constants the constants
	*/
	public CwDataGrid(CwConstants constants) {
	super(constants.cwDataGridName(), constants.cwDataGridDescription(), false,
	"ContactDatabase.java", "CwDataGrid.ui.xml");
	this.constants = constants;
	}

	@Override
	public boolean hasMargins() {
	return false;
	}

	@Override
	public boolean hasScrollableContent() {
	return false;
	}

	/**
	* Initialize this example.
	*/
	@ShowcaseSource
	@Override
	public Widget onInitialize() {
	// Create a DataGrid.

	// Set a key provider that provides a unique key for each contact. If key is
	// used to identify contacts when fields (such as the name and address)
	// change.
	dataGrid = new DataGrid<ContactInfo>(ContactDatabase.ContactInfo.KEY_PROVIDER);
	dataGrid.setWidth("100%");

	// Set the message to display when the table is empty.
	dataGrid.setEmptyTableWidget(new Label(constants.cwDataGridEmpty()));

	// Attach a column sort handler to the ListDataProvider to sort the list.
	ListHandler<ContactInfo> sortHandler =
	new ListHandler<ContactInfo>(ContactDatabase.get().getDataProvider().getList());
	dataGrid.addColumnSortHandler(sortHandler);

	// 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(dataGrid);

	// Add a selection model so we can select cells.
	final SelectionModel<ContactInfo> selectionModel =
	new MultiSelectionModel<ContactInfo>(ContactDatabase.ContactInfo.KEY_PROVIDER);
	dataGrid.setSelectionModel(selectionModel, DefaultSelectionEventManager
	.<ContactInfo> createCheckboxManager());

	// Initialize the columns.
	initTableColumns(selectionModel, sortHandler);

	// Add the CellList to the adapter in the database.
	ContactDatabase.get().addDataDisplay(dataGrid);

	// Create the UiBinder.
	Binder uiBinder = GWT.create(Binder.class);
	return uiBinder.createAndBindUi(this);
	}

	@Override
	protected void asyncOnInitialize(final AsyncCallback<Widget> callback) {
	GWT.runAsync(CwDataGrid.class, new RunAsyncCallback() {

	public void onFailure(Throwable caught) {
	callback.onFailure(caught);
	}

	public void onSuccess() {
	callback.onSuccess(onInitialize());
	}
	});
	}

	/**
	* Add the columns to the table.
	*/
	@ShowcaseSource
	private void initTableColumns(final SelectionModel<ContactInfo> selectionModel,
	ListHandler<ContactInfo> sortHandler) {
	// Checkbox column. This table will uses a checkbox column for selection.
	// Alternatively, you can call dataGrid.setSelectionEnabled(true) to enable
	// mouse selection.
	Column<ContactInfo, Boolean> checkColumn =
	new Column<ContactInfo, Boolean>(new CheckboxCell(true, false)) {
	@Override
	public Boolean getValue(ContactInfo object) {
	// Get the value from the selection model.
	return selectionModel.isSelected(object);
	}
	};
	dataGrid.addColumn(checkColumn, SafeHtmlUtils.fromSafeConstant("<br/>"));
	dataGrid.setColumnWidth(checkColumn, 40, Unit.PX);

	// First name.
	Column<ContactInfo, String> firstNameColumn =
	new Column<ContactInfo, String>(new EditTextCell()) {
	@Override
	public String getValue(ContactInfo object) {
	return object.getFirstName();
	}
	};
	firstNameColumn.setSortable(true);
	sortHandler.setComparator(firstNameColumn, new Comparator<ContactInfo>() {
	public int compare(ContactInfo o1, ContactInfo o2) {
	return o1.getFirstName().compareTo(o2.getFirstName());
	}
	});
	dataGrid.addColumn(firstNameColumn, constants.cwDataGridColumnFirstName());
	firstNameColumn.setFieldUpdater(new FieldUpdater<ContactInfo, String>() {
	public void update(int index, ContactInfo object, String value) {
	// Called when the user changes the value.
	object.setFirstName(value);
	ContactDatabase.get().refreshDisplays();
	}
	});
	dataGrid.setColumnWidth(firstNameColumn, 20, Unit.PCT);

	// Last name.
	Column<ContactInfo, String> lastNameColumn =
	new Column<ContactInfo, String>(new EditTextCell()) {
	@Override
	public String getValue(ContactInfo object) {
	return object.getLastName();
	}
	};
	lastNameColumn.setSortable(true);
	sortHandler.setComparator(lastNameColumn, new Comparator<ContactInfo>() {
	public int compare(ContactInfo o1, ContactInfo o2) {
	return o1.getLastName().compareTo(o2.getLastName());
	}
	});
	dataGrid.addColumn(lastNameColumn, constants.cwDataGridColumnLastName());
	lastNameColumn.setFieldUpdater(new FieldUpdater<ContactInfo, String>() {
	public void update(int index, ContactInfo object, String value) {
	// Called when the user changes the value.
	object.setLastName(value);
	ContactDatabase.get().refreshDisplays();
	}
	});
	dataGrid.setColumnWidth(lastNameColumn, 20, Unit.PCT);

	// Age.
	Column<ContactInfo, Number> ageColumn = new Column<ContactInfo, Number>(new NumberCell()) {
	@Override
	public Number getValue(ContactInfo object) {
	return object.getAge();
	}
	};
	lastNameColumn.setSortable(true);
	sortHandler.setComparator(ageColumn, new Comparator<ContactInfo>() {
	public int compare(ContactInfo o1, ContactInfo o2) {
	return o1.getBirthday().compareTo(o2.getBirthday());
	}
	});
	Header<String> ageFooter = new Header<String>(new TextCell()) {
	@Override
	public String getValue() {
	List<ContactInfo> items = dataGrid.getVisibleItems();
	if (items.size() == 0) {
	return "";
	} else {
	int totalAge = 0;
	for (ContactInfo item : items) {
	totalAge += item.getAge();
	}
	return "Avg: " + totalAge / items.size();
	}
	}
	};
	dataGrid.addColumn(ageColumn, new SafeHtmlHeader(SafeHtmlUtils.fromSafeConstant(constants
	.cwDataGridColumnAge())), ageFooter);
	dataGrid.setColumnWidth(ageColumn, 7, Unit.EM);

	// Category.
	final Category[] categories = ContactDatabase.get().queryCategories();
	List<String> categoryNames = new ArrayList<String>();
	for (Category category : categories) {
	categoryNames.add(category.getDisplayName());
	}
	SelectionCell categoryCell = new SelectionCell(categoryNames);
	Column<ContactInfo, String> categoryColumn = new Column<ContactInfo, String>(categoryCell) {
	@Override
	public String getValue(ContactInfo object) {
	return object.getCategory().getDisplayName();
	}
	};
	dataGrid.addColumn(categoryColumn, constants.cwDataGridColumnCategory());
	categoryColumn.setFieldUpdater(new FieldUpdater<ContactInfo, String>() {
	public void update(int index, ContactInfo object, String value) {
	for (Category category : categories) {
	if (category.getDisplayName().equals(value)) {
	object.setCategory(category);
	}
	}
	ContactDatabase.get().refreshDisplays();
	}
	});
	dataGrid.setColumnWidth(categoryColumn, 130, Unit.PX);

	// Address.
	Column<ContactInfo, String> addressColumn = new Column<ContactInfo, String>(new TextCell()) {
	@Override
	public String getValue(ContactInfo object) {
	return object.getAddress();
	}
	};
	addressColumn.setSortable(true);
	sortHandler.setComparator(addressColumn, new Comparator<ContactInfo>() {
	public int compare(ContactInfo o1, ContactInfo o2) {
	return o1.getAddress().compareTo(o2.getAddress());
	}
	});
	dataGrid.addColumn(addressColumn, constants.cwDataGridColumnAddress());
	dataGrid.setColumnWidth(addressColumn, 60, Unit.PCT);
	}
	}