com.google.gwt.view.client.HasData Maven / Gradle / Ivy
/*
* 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 java.util.List;
/**
* A view that can display a range of data.
*
* @param the data type of each row
*/
public interface HasData extends HasRows, HasCellPreviewHandlers {
/**
* Get the {@link SelectionModel} used by this {@link HasData}.
*
* @return the {@link SelectionModel}
*
* @see #setSelectionModel(SelectionModel)
*/
SelectionModel getSelectionModel();
/**
* Get the row value at the specified visible index. Index 0 corresponds to
* the first item on the page.
*
* @param indexOnPage the index on the page
* @return the row value
*/
T getVisibleItem(int indexOnPage);
/**
* Get the number of visible items being displayed. Note that this value might
* be less than the page size if there is not enough data to fill the page.
*
* @return the number of visible items on the page
*/
int getVisibleItemCount();
/**
* Get an {@link Iterable} composed of all of the visible items.
*
* @return an {@link Iterable} instance
*/
Iterable getVisibleItems();
/**
*
* Set a values associated with the rows in the visible range.
*
*
* This method does not replace all rows in the display; it replaces
* the row values starting at the specified start index through the length of
* the specified values. You must call {@link #setRowCount(int)} to set
* the total number of rows in the display. You should also use
* {@link #setRowCount(int)} to remove rows when the total number of rows
* decreases.
*
*
* @param start the start index of the data
* @param values the values within the range
*/
void setRowData(int start, List values);
/**
* Set the {@link SelectionModel} used by this {@link HasData}.
*
* @param selectionModel the {@link SelectionModel}
*
* @see #getSelectionModel()
*/
void setSelectionModel(SelectionModel selectionModel);
/**
*
* Set the visible range and clear the current visible data.
*
*
* If the second argument forceRangeChangeEvent is true, a
* {@link RangeChangeEvent} will be fired even if the range does not change.
* If false, a {@link RangeChangeEvent} will only be fired if the range
* changes.
*
*
* @param range the new {@link Range}
* @param forceRangeChangeEvent true to fire a {@link RangeChangeEvent} even
* if the {@link Range} doesn't change
*/
void setVisibleRangeAndClearData(Range range, boolean forceRangeChangeEvent);
}