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/*
* Copyright 2010 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.HandlerRegistration;
import com.google.gwt.event.shared.HasHandlers;
/**
* Describes an object that displays a range of rows.
*/
public interface HasRows extends HasHandlers {
/**
* Add a {@link RangeChangeEvent.Handler}.
*
* @param handler the handler
* @return a {@link HandlerRegistration} to remove the handler
*/
HandlerRegistration addRangeChangeHandler(RangeChangeEvent.Handler handler);
/**
* Add a {@link RowCountChangeEvent.Handler}.
*
* @param handler the handler
* @return a {@link HandlerRegistration} to remove the handler
*/
HandlerRegistration addRowCountChangeHandler(
RowCountChangeEvent.Handler handler);
/**
* Get the total count of all rows.
*
* @return the total row count
*
* @see #setRowCount(int)
*/
int getRowCount();
/**
* Get the range of visible rows.
*
* @return the visible range
*
* @see #setVisibleRange(Range)
* @see #setVisibleRange(int, int)
*/
Range getVisibleRange();
/**
* Check if the total row count is exact, or an estimate.
*
* @return true if exact, false if an estimate
*/
boolean isRowCountExact();
/**
* Set the exact total count of all rows. This method defers to
* {@link #setRowCount(int, boolean)}.
*
* @param count the exact total count
*
* @see #getRowCount()
*/
void setRowCount(int count);
/**
* Set the total count of all rows, specifying whether the count is exact or
* an estimate.
*
* @param count the total count
* @param isExact true if the count is exact, false if an estimate
* @see #getRowCount()
*/
void setRowCount(int count, boolean isExact);
/**
* Set the visible range or rows. This method defers to
* {@link #setVisibleRange(Range)}.
*
* @param start the start index
* @param length the length
*
* @see #getVisibleRange()
*/
// TODO(jlabanca): Should we include setPageStart/Size as shortcut methods?
void setVisibleRange(int start, int length);
/**
* Set the visible range or rows.
*
* @param range the visible range
*
* @see #getVisibleRange()
*/
void setVisibleRange(Range range);
}