org.uberfire.ext.widgets.common.client.tables.SortableHeader Maven / Gradle / Ivy
/*
* Copyright 2015 JBoss, by Red Hat, 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 org.uberfire.ext.widgets.common.client.tables;
import com.google.gwt.cell.client.Cell;
import com.google.gwt.cell.client.ClickableTextCell;
import com.google.gwt.cell.client.ValueUpdater;
import com.google.gwt.resources.client.ImageResource;
import com.google.gwt.safehtml.shared.SafeHtmlBuilder;
import com.google.gwt.user.cellview.client.Column;
import com.google.gwt.user.cellview.client.Header;
import com.google.gwt.user.client.ui.AbstractImagePrototype;
import org.uberfire.ext.widgets.common.client.resources.CommonResources;
/**
* Based on GWT bikeshed example.
*/
public class SortableHeader extends Header {
private static final String DOWN_ARROW = makeImage(CommonResources.INSTANCE.images().downArrow());
private static final String SMALL_DOWN_ARROW = makeImage(CommonResources.INSTANCE.images().smallDownArrow());
private static final String UP_ARROW = makeImage(CommonResources.INSTANCE.images().upArrow());
private static final String SMALL_UP_ARROW = makeImage(CommonResources.INSTANCE.images().smallUpArrow());
private final SortableHeaderGroup sortableHeaderGroup;
private final Column column;
private String text;
private SortDirection sortDirection = SortDirection.NONE;
private int sortIndex = -1;
public SortableHeader(SortableHeaderGroup sortableHeaderGroup,
String text,
Column column) {
super(new ClickableTextCell());
this.sortableHeaderGroup = sortableHeaderGroup;
this.text = text;
this.column = column;
setUpdater(new ValueUpdater() {
public void update(String s) {
SortableHeader.this.sortableHeaderGroup.headerClicked(SortableHeader.this);
}
});
}
private static String makeImage(ImageResource resource) {
AbstractImagePrototype prototype = AbstractImagePrototype.create(resource);
return prototype.getHTML();
}
/**
* @return the header label
*/
public String getValue() {
return text;
}
/**
* Set the Column header
* @param text
*/
public void setValue(String text) {
this.text = text;
}
public Column getColumn() {
return column;
}
public SortDirection getSortDirection() {
return sortDirection;
}
public void setSortDirection(SortDirection sortDirection) {
this.sortDirection = sortDirection;
}
public int getSortIndex() {
return sortIndex;
}
public void setSortIndex(int sortIndex) {
this.sortIndex = sortIndex;
}
@Override
public void render(Cell.Context context,
SafeHtmlBuilder sb) {
sb.appendHtmlConstant("");
sb.appendHtmlConstant("");
sb.appendEscaped(text);
sb.appendHtmlConstant("");
// sb.appendHtmlConstant("");
switch (sortDirection) {
case NONE:
// nothing
break;
case ASCENDING:
sb.appendHtmlConstant(sortIndex == 0 ? UP_ARROW : SMALL_UP_ARROW);
break;
case DESCENDING:
sb.appendHtmlConstant(sortIndex == 0 ? DOWN_ARROW : SMALL_DOWN_ARROW);
break;
default:
throw new IllegalArgumentException("Unknown sortDirection ("
+ sortDirection
+ ").");
}
sb.appendHtmlConstant("");
// sb.appendHtmlConstant("");
// sb.appendHtmlConstant("