TagPanel.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2021 Lluis Turró Cutiller <http://www.turro.org/>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
package org.turro.tags;
 
import java.util.Set;
import java.util.stream.Collectors;
import org.zkoss.zk.ui.event.Event;
import org.zkoss.zk.ui.event.Events;
import org.zkoss.zk.ui.ext.AfterCompose;
import org.zkoss.zul.Div;
import org.zkoss.zul.Label;
import org.zkoss.zul.Separator;
 
public class TagPanel extends Div implements AfterCompose {
 
  private String entityRoot;
  private TagSet tags;
  private Div allTags;
 
  public TagPanel() {
    allTags = new Div();
    appendChild(allTags);
    appendChild(new Separator("horizontal"));
  }
 
  public String getEntityRoot() {
    return entityRoot;
  }
 
  public void setEntityRoot(String entityRoot) {
    this.entityRoot = entityRoot;
  }
 
  public Set<TagItem> getSelected() {
    return tags.getSelected();
  }
 
  public void updateTags() {
    tags = Tags.getAvailables(entityRoot);
    long maxUsage = tags.getMaxUsage();
    drawTags(maxUsage);
  }
 
  private void drawTags(long maxUsage) {
    allTags.getChildren().clear();
    for(TagItem tag : tags) {
      final Label label = new Label(tag.getTagName());
      String font = tag.isSelected() ? "bold" : "normal";
      String color = tag.isSelected() ? "#333" : "#156dc6";
      label.setStyle("cursor:pointer;font-size:" + (int) (11 +
              (5 * (double)((double)tag.getUsage() / (double)maxUsage))) + 
              "px;font-weight:" + font + ";color:" + color);
      label.setAttribute("tag", tag);
      label.addEventListener(Events.ON_CLICK, (Event event) -> {
        TagItem tag1 = (TagItem) label.getAttribute("tag");
        tag1.setSelected(!tag1.isSelected());
        Events.postEvent(new Event(Events.ON_CHANGE, TagPanel.this));
        drawTags(maxUsage);
      });
      label.setTooltiptext(Tags.getSiblings(entityRoot, 
              Set.of(tag.getTagName())).stream().map(t -> t.getTagName())
              .collect(Collectors.joining(", "))); 
      allTags.appendChild(label);
      allTags.appendChild(new Separator("vertical"));
    }
  }
 
  @Override
  public void afterCompose() {
    updateTags();
  }
 
}