001/*
002 * #%L
003 * GwtMaterial
004 * %%
005 * Copyright (C) 2015 - 2017 GwtMaterialDesign
006 * %%
007 * Licensed under the Apache License, Version 2.0 (the "License");
008 * you may not use this file except in compliance with the License.
009 * You may obtain a copy of the License at
010 * 
011 *      http://www.apache.org/licenses/LICENSE-2.0
012 * 
013 * Unless required by applicable law or agreed to in writing, software
014 * distributed under the License is distributed on an "AS IS" BASIS,
015 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
016 * See the License for the specific language governing permissions and
017 * limitations under the License.
018 * #L%
019 */
020package gwt.material.design.client.data;
021
022import gwt.material.design.client.base.constants.TableCssName;
023import gwt.material.design.client.ui.MaterialIcon;
024import gwt.material.design.client.ui.table.TableHeader;
025import gwt.material.design.client.ui.table.cell.Column;
026
027/**
028 * @author Ben Dol
029 */
030public class SortContext<T> {
031    private TableHeader tableHeader;
032    protected Column<T, ?> sortColumn;
033    protected SortDir sortDir = SortDir.ASC;
034    protected boolean sorted;
035
036    protected SortContext(SortContext<T> sortContext) {
037        if(sortContext != null) {
038            tableHeader = sortContext.tableHeader;
039            sortColumn = sortContext.sortColumn;
040            sortDir = sortContext.sortDir;
041            sorted = sortContext.sorted;
042        }
043    }
044
045    protected SortContext(Column<T, ?> sortColumn, TableHeader tableHeader) {
046        this.sortColumn = sortColumn;
047        if(!this.sortColumn.isDefaultSortAscending()) {
048            sortDir = SortDir.DESC;
049        }
050        setTableHeader(tableHeader);
051    }
052
053    public Column<T, ?> getSortColumn() {
054        return sortColumn;
055    }
056
057    public void setSortDir(SortDir sortDir) {
058        this.sortDir = sortDir;
059    }
060
061    public SortDir getSortDir() {
062        return sortDir;
063    }
064
065    protected void setSortColumn(Column<T, ?> sortColumn) {
066        reset();
067        this.sortColumn = sortColumn;
068
069        if(sortColumn != null && !sortColumn.isDefaultSortAscending()) {
070            sortDir = SortDir.DESC;
071        } else {
072            sortDir = SortDir.ASC;
073        }
074    }
075
076    protected void setTableHeader(TableHeader tableHeader) {
077        if(tableHeader.getSortIcon() == null) {
078            tableHeader.setSortIcon(new MaterialIcon());
079        }
080        this.tableHeader = tableHeader;
081    }
082
083    public TableHeader getTableHeader() {
084        return tableHeader;
085    }
086
087    protected void reverse() {
088        sortDir = sortDir.reverse();
089    }
090
091    protected void reset() {
092        tableHeader.removeSortIcon();
093        tableHeader.removeStyleName(TableCssName.SELECTED);
094        sortDir = SortDir.ASC;
095        sortColumn = null;
096    }
097
098    public boolean isSorted() {
099        return sorted;
100    }
101
102    public void setSorted(boolean sorted) {
103        this.sorted = sorted;
104    }
105}