| /* |
| * Copyright 2008 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.view.client; |
| |
| import com.google.gwt.event.shared.EventHandler; |
| import com.google.gwt.event.shared.GwtEvent; |
| |
| /** |
| * Represents a row count change event. |
| */ |
| public class RowCountChangeEvent extends GwtEvent<RowCountChangeEvent.Handler> { |
| |
| /** |
| * Handler type. |
| */ |
| private static Type<Handler> TYPE; |
| |
| /** |
| * Handler interface for {@link RowCountChangeEvent} events. |
| */ |
| public static interface Handler extends EventHandler { |
| |
| /** |
| * Called when a {@link RowCountChangeEvent} is fired. |
| * |
| * @param event the {@link RowCountChangeEvent} that was fired |
| */ |
| void onRowCountChange(RowCountChangeEvent event); |
| } |
| |
| /** |
| * Fires a {@link RowCountChangeEvent} on all registered handlers in the |
| * handler manager. If no such handlers exist, this method will do nothing. |
| * |
| * @param source the source of the handlers |
| * @param rowCount the new rowCount |
| * @param isExact true if rowCount is an exact count |
| */ |
| public static void fire(HasRows source, int rowCount, boolean isExact) { |
| if (TYPE != null) { |
| RowCountChangeEvent event = new RowCountChangeEvent(rowCount, isExact); |
| source.fireEvent(event); |
| } |
| } |
| |
| /** |
| * Gets the type associated with this event. |
| * |
| * @return returns the handler type |
| */ |
| public static Type<Handler> getType() { |
| if (TYPE == null) { |
| TYPE = new Type<Handler>(); |
| } |
| return TYPE; |
| } |
| |
| private final int rowCount; |
| private final boolean isExact; |
| |
| /** |
| * Creates a {@link RowCountChangeEvent}. |
| * |
| * @param rowCount the new row count |
| * @param isExact true if the row count is exact |
| */ |
| protected RowCountChangeEvent(int rowCount, boolean isExact) { |
| this.rowCount = rowCount; |
| this.isExact = isExact; |
| } |
| |
| @Override |
| public final Type<Handler> getAssociatedType() { |
| return TYPE; |
| } |
| |
| /** |
| * Gets the new row count. |
| * |
| * @return the new row count |
| */ |
| public int getNewRowCount() { |
| return rowCount; |
| } |
| |
| /** |
| * Check if the new row count is exact. |
| * |
| * @return true if the new row count is exact, false if not |
| */ |
| public boolean isNewRowCountExact() { |
| return isExact; |
| } |
| |
| @Override |
| public String toDebugString() { |
| return super.toDebugString() + getNewRowCount(); |
| } |
| |
| @Override |
| protected void dispatch(Handler handler) { |
| handler.onRowCountChange(this); |
| } |
| } |