Gantt.java

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/*
 * Turró i Cutiller Foundation. License notice.
 * Copyright (C) 2011 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.zkoss.svg;
 
import org.turro.string.Strings;
import org.turro.i18n.I_;
 
public class Gantt extends Svg {
  
  static final private int 
          RULE_SPAN = 40, 
          RULE_HEIGHT = 10,
          ITEM_INIT = 40,
          ITEM_HEIGHT = 20,
          ITEM_SPAN = 30;
  
  private GanttData data;
  private int taskPanelWidth = 300, hoursPanelWidth;
  private GanttMeasure measure;
  
  public GanttData getData() {
    return data;
  }
 
  public void setData(GanttData data) {
    this.data = data;
  }
  
  public void rule(int units) {
    String nunit = I_.byKey(measure.toString());
    setForceStyle("font-size:10px");
    text(nunit, taskPanelWidth - (nunit.length() * GanttData.CHAR_PIXELS) - 5, RULE_HEIGHT + 6); 
    line(taskPanelWidth, 15, taskPanelWidth + (units * RULE_SPAN), 15, "#000", "1px");
    for(int i = 0; i <= units; i++) {
      line(taskPanelWidth + (i * RULE_SPAN), 15, taskPanelWidth + (i * RULE_SPAN), 20, "#000", "1px");
      setForceStyle("font-size:10px");
      text("" + i, taskPanelWidth + (i * RULE_SPAN) - 5, RULE_HEIGHT);
    }
  }
  
  @Override
  public void startComposing(String onUserEvent, String width, String height, double scale) {
    measure = GanttMeasure.chooseMeasure(data.getMaxHoursLenght());
    taskPanelWidth = data.getMaxNameLenght() * GanttData.CHAR_PIXELS;
    int maxUnits = (int) Math.ceil(measure.convert(data.getMaxHoursLenght()));
    hoursPanelWidth = maxUnits * RULE_SPAN;
    
    if(width == null) {
      width = "" + ((taskPanelWidth + (maxUnits * RULE_SPAN) + 20) * scale);
    }
    if(height == null) {
      height = "" + (((data.size() * ITEM_SPAN) + RULE_HEIGHT + 20) * scale);
    }
    super.startComposing(onUserEvent, width, height, scale);
 
    startTag("n:g", new String[] {
      "style='stroke:none'",
      "font-size='13px'",
      "font-style='normal'",
      "font-family='Ubuntu'"
    });
 
    rule(maxUnits);
    
    int count = 0;
    for(GanttItem gi : data) {
      count++;
      gi.setPosition(count);
      int x1 = (int) (taskPanelWidth + (measure.convert(gi.getStart()) * RULE_SPAN));
      int dx2a = (int) (RULE_SPAN * measure.convert(gi.getHours()));
      int dx2b = (int) (RULE_SPAN * measure.convert(gi.getDone()));
      int y1 = (ITEM_SPAN * (gi.getPosition() - 1)) + ITEM_INIT;
      int dy2 = ITEM_HEIGHT;
      if(!Strings.isBlank(gi.getUniqueId())) {
        setForceStyle("cursor:pointer;");
        setClickElementData(gi.getUniqueId());
        text(Strings.truncateAndWarn(gi.getName(), GanttData.MAX_NAME_LENGTH), 15, y1 + 15, gi.getName());
        setForceStyle("cursor:pointer;");
        setClickElementData(gi.getUniqueId());
        if(gi.isFinished()) {
          shadowedRoundRectangle(x1, y1, dx2a, dy2, "#55ff55", 1, gi.getName());
        } else {
          shadowedRoundRectangle(x1, y1, dx2a, dy2, "#5555ff", 1, gi.getName());
        }
        setForceStyle("cursor:pointer;");
        setClickElementData(gi.getUniqueId());
        shadowedRoundRectangle(x1, y1 + 5, dx2b, dy2 - 10, "#ff5555", 1, gi.getName());
        if(gi.isMilestone()) {
          int x = (int) Math.max(x1 + dx2a, x1 + dx2b) +5;
          int y = (ITEM_SPAN * (count - 1)) + ITEM_INIT + 5;
          int square = (int) (ITEM_HEIGHT * 0.6);
          setForceTransform("rotate(45," + (x + square/2) + "," + (y + square/2) + ")");
          shadowedRectangle(
                  x, 
                  y, 
                  square, 
                  square, "#000000", 1);
        }
      } else {
        setForceStyle("fill:#888899");
        text(Strings.truncateAndWarn(gi.getName(), GanttData.MAX_NAME_LENGTH), 5, (ITEM_SPAN * count) - 14 + ITEM_INIT, gi.getName());
        shadowedRoundSpan(x1 - 5, y1, dx2a + 10, dy2 - 10, "#aaaabb", 1);
      }
      line(5, y1 + ITEM_HEIGHT + ((ITEM_SPAN - ITEM_HEIGHT) / 2), 
              5 + taskPanelWidth + hoursPanelWidth, y1 + ITEM_HEIGHT + ((ITEM_SPAN - ITEM_HEIGHT) / 2),
              "#aca", "1px");
    }
    for(GanttItem gi : data) {
      int x1 = (int) (taskPanelWidth + (measure.convert(gi.getStart()) * RULE_SPAN));
      int y1 = (ITEM_SPAN * (gi.getPosition() - 1)) + ITEM_INIT;
      for(GanttPredecessor gp : gi.getPredecessors()) {
        GanttItem predecessor = data.getItem(gp.getIndex());
        int px1 = (int) (taskPanelWidth + (measure.convert(predecessor.getStart()) * RULE_SPAN));
        int pdx2 = (int) (RULE_SPAN * measure.convert(predecessor.getMaxHours()));
        int py1 = (ITEM_SPAN * (predecessor.getPosition() - 1)) + ITEM_INIT;
        String lineColor= gp.isSameSpace() ? "#333" : "#F33";
        if(gp.getMode() == GanttPredecessor.GANTT_START_TO_START) {
          circle(x1, y1 + ITEM_HEIGHT / 2, 4, lineColor, "1px", lineColor, 1);
          //line(x1 - 1, y1 + ITEM_HEIGHT / 2, x1 + 3, y1 + ITEM_HEIGHT / 2, "#333", "2px");
          line(x1, y1 + ITEM_HEIGHT / 2, px1, py1 + ITEM_HEIGHT / 2, lineColor, "2px");
          line(px1 - 1, py1 + ITEM_HEIGHT / 2, px1 + 3, py1 + ITEM_HEIGHT / 2, lineColor, "2px");
        } else {
          circle(x1, y1 + ITEM_HEIGHT / 2, 4, lineColor, "1px", lineColor, 1);
          line(x1, y1 + ITEM_HEIGHT / 2, px1 + pdx2, py1 + ITEM_HEIGHT / 2, lineColor, "2px");          
          line(px1 + pdx2 + 1, py1 + ITEM_HEIGHT / 2, px1 + pdx2 - 3, py1 + ITEM_HEIGHT / 2, lineColor, "2px");
        }
      }
    }
  }
}