ResourceDrawHistogram.java

/* ========================================================================
 * PlantUML : a free UML diagram generator
 * ========================================================================
 *
 * (C) Copyright 2009-2024, Arnaud Roques
 *
 * Project Info:  https://plantuml.com
 * 
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 * PlantUML is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by
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 * PlantUML 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 General Public
 * License for more details.
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 * You should have received a copy of the GNU General Public
 * License along with this library; if not, write to the Free Software
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 * Original Author:  Arnaud Roques
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package net.sourceforge.plantuml.project.draw;

import net.sourceforge.plantuml.klimt.UTranslate;
import net.sourceforge.plantuml.klimt.color.HColor;
import net.sourceforge.plantuml.klimt.color.HColors;
import net.sourceforge.plantuml.klimt.creole.Display;
import net.sourceforge.plantuml.klimt.drawing.UGraphic;
import net.sourceforge.plantuml.klimt.font.FontConfiguration;
import net.sourceforge.plantuml.klimt.font.StringBounder;
import net.sourceforge.plantuml.klimt.font.UFont;
import net.sourceforge.plantuml.klimt.geom.HorizontalAlignment;
import net.sourceforge.plantuml.klimt.shape.TextBlock;
import net.sourceforge.plantuml.klimt.shape.ULine;
import net.sourceforge.plantuml.klimt.shape.URectangle;
import net.sourceforge.plantuml.klimt.sprite.SpriteContainerEmpty;
import net.sourceforge.plantuml.project.GanttDiagram;
import net.sourceforge.plantuml.project.core.Resource;
import net.sourceforge.plantuml.project.time.Day;
import net.sourceforge.plantuml.project.timescale.TimeScale;

public class ResourceDrawHistogram implements ResourceDraw {

	private final Resource res;
	private final TimeScale timeScale;
	private final double y;
	private final Day min;
	private final Day max;
	private final GanttDiagram gantt;

	public ResourceDrawHistogram(GanttDiagram gantt, Resource res, TimeScale timeScale, double y, Day min, Day max) {
		this.res = res;
		this.timeScale = timeScale;
		this.y = y;
		this.min = min;
		this.max = max;
		this.gantt = gantt;
	}

	private UGraphic withColor(UGraphic ug, HColor color) {
		return ug.apply(color).apply(color.bg());
	}

	public void drawU(UGraphic ug) {
		final StringBounder stringBounder = ug.getStringBounder();

		for (Day i = min; i.compareTo(max) <= 0; i = i.increment()) {
			final int load = gantt.getLoadForResource(res, i);
			final double startingPosition = timeScale.getStartingPosition(i);
			final double width = timeScale.getStartingPosition(i.increment()) - startingPosition;
			final double height = Math.min(30.0, load * 16.0 / 100.0);
			if (height > 0 && width > 0) {
				final URectangle rect = URectangle.build(width, height);
				final HColor color = load > 100 ? HColors.RED : HColors.GRAY;
				withColor(ug.apply(new UTranslate(startingPosition, getHeight(stringBounder) - rect.getHeight())),
						color).draw(rect);
			}
		}

		final TextBlock title = Display.getWithNewlines(gantt.getPragma(), res.getName())
				.create(getFontConfiguration(13), HorizontalAlignment.LEFT, new SpriteContainerEmpty());
		title.drawU(ug);
		final ULine line = ULine.hline(timeScale.getEndingPosition(max) - timeScale.getStartingPosition(min));
		ug.apply(HColors.BLACK).draw(line);
		ug.apply(HColors.GRAY).apply(UTranslate.dy(16)).draw(line);
		ug.apply(HColors.BLACK).apply(UTranslate.dy(getHeight(stringBounder))).draw(line);

	}

	private FontConfiguration getFontConfiguration(int size) {
		return getFontConfiguration(size, HColors.BLACK);
	}

	private FontConfiguration getFontConfiguration(int size, HColor color) {
		final UFont font = UFont.serif(size);
		return FontConfiguration.create(font, color, color, null);
	}

	@Override
	public double getHeight(StringBounder stringBounder) {
		return 16 * 2;
	}

	@Override
	public final double getY() {
		return y;
	}

}