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/*
* Copyright 2000-2022 Vaadin Ltd.
*
* 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.vaadin.v7.client.widget.grid;
import com.google.gwt.dom.client.TableCellElement;
import com.vaadin.v7.client.widget.escalator.Cell;
import com.vaadin.v7.client.widgets.Grid;
import com.vaadin.v7.client.widgets.Grid.Column;
import com.vaadin.v7.shared.ui.grid.GridConstants.Section;
/**
* A data class which contains information which identifies a cell being the
* target of an event from {@link Grid}.
* <p>
* Since this class follows the <code>Flyweight</code>-pattern any instance of
* this object is subject to change without the user knowing it and so should
* not be stored anywhere outside of the method providing these instances.
*
* @since 7.4
* @author Vaadin Ltd
*/
public class EventCellReference<T> extends CellReference<T> {
private Section section;
private TableCellElement element;
public EventCellReference(Grid<T> grid) {
super(new RowReference<T>(grid));
}
/**
* Sets the RowReference and CellReference to point to given Cell.
*
* @param targetCell
* cell to point to
*/
public void set(Cell targetCell, Section section) {
Grid<T> grid = getGrid();
int columnIndexDOM = targetCell.getColumn();
Column<?, T> column = null;
if (columnIndexDOM >= 0
&& columnIndexDOM < grid.getVisibleColumns().size()) {
column = grid.getVisibleColumns().get(columnIndexDOM);
}
int row = targetCell.getRow();
// Row objects only make sense for body section of Grid.
T rowObject;
if (section == Section.BODY && row >= 0
&& row < grid.getDataSource().size()) {
rowObject = grid.getDataSource().getRow(row);
} else {
rowObject = null;
}
// At least for now we don't need to have the actual TableRowElement
// available.
getRowReference().set(row, rowObject, null);
int columnIndex = grid.getColumns().indexOf(column);
set(columnIndexDOM, columnIndex, column);
this.element = targetCell.getElement();
this.section = section;
}
@Override
public TableCellElement getElement() {
return element;
}
/**
* Is the cell reference for a cell in the header of the Grid.
*
* @since 7.5
* @return <code>true</code> if referenced cell is in the header,
* <code>false</code> if not
*/
public boolean isHeader() {
return section == Section.HEADER;
}
/**
* Is the cell reference for a cell in the body of the Grid.
*
* @since 7.5
* @return <code>true</code> if referenced cell is in the body,
* <code>false</code> if not
*/
public boolean isBody() {
return section == Section.BODY;
}
/**
* Is the cell reference for a cell in the footer of the Grid.
*
* @since 7.5
* @return <code>true</code> if referenced cell is in the footer,
* <code>false</code> if not
*/
public boolean isFooter() {
return section == Section.FOOTER;
}
/**
* Gets the Grid section where the referenced cell is.
*
* @since 7.5
* @return grid section
*/
public Section getSection() {
return section;
}
}
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