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OptaPlanner solves planning problems. This lightweight, embeddable planning engine implements powerful and scalable algorithms to optimize business resource scheduling and planning. This module contains the examples which demonstrate how to use it in a normal Java application.
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package org.optaplanner.examples.common.swingui.timetable;

import java.awt.Dimension;
import java.awt.Rectangle;
import java.util.HashMap;
import java.util.Map;

import javax.swing.JComponent;
import javax.swing.JPanel;
import javax.swing.JViewport;
import javax.swing.Scrollable;

import org.optaplanner.examples.common.swingui.SolutionPanel;

public final class TimeTablePanel extends JPanel implements Scrollable {

    private final TimeTableLayout layout = new TimeTableLayout();
    private final Map xMap = new HashMap<>();
    private final Map yMap = new HashMap<>();

    public TimeTablePanel() {
        setLayout(layout);
    }

    public void reset() {
        removeAll();
        layout.reset();
        xMap.clear();
        yMap.clear();
    }

    // ************************************************************************
    // Define methods
    // ************************************************************************

    public void defineColumnHeaderByKey(HeaderColumnKey xObject) {
        int x = layout.addColumn();
        xMap.put(xObject, x);
    }

    public void defineColumnHeader(XObject xObject) {
        int x = layout.addColumn();
        xMap.put(xObject, x);
    }

    public void defineColumnHeader(XObject xObject, int width) {
        int x = layout.addColumn(width);
        xMap.put(xObject, x);
    }

    public void defineRowHeaderByKey(HeaderRowKey yObject) {
        int y = layout.addRow();
        yMap.put(yObject, y);
    }

    public void defineRowHeader(YObject yObject) {
        int y = layout.addRow();
        yMap.put(yObject, y);
    }

    public void defineRowHeader(YObject yObject, int height) {
        int y = layout.addRow(height);
        yMap.put(yObject, y);
    }

    // ************************************************************************
    // Add methods
    // ************************************************************************

    public void addCornerHeader(HeaderColumnKey xObject, HeaderRowKey yObject, JComponent component) {
        int x = xMap.get(xObject);
        int y = yMap.get(yObject);
        add(component, new TimeTableLayoutConstraints(x, y, true));
    }

    public void addColumnHeader(XObject xObject, HeaderRowKey yObject, JComponent component) {
        int x = xMap.get(xObject);
        int y = yMap.get(yObject);
        add(component, new TimeTableLayoutConstraints(x, y, true));
    }

    public void addColumnHeader(XObject xObject1, HeaderRowKey yObject1, XObject xObject2, HeaderRowKey yObject2,
            JComponent component) {
        int x1 = xMap.get(xObject1);
        int y1 = yMap.get(yObject1);
        int x2 = xMap.get(xObject2);
        int y2 = yMap.get(yObject2);
        add(component, new TimeTableLayoutConstraints(x1, y1, x2 - x1 + 1, y2 - y1 + 1, true));
    }

    public void addRowHeader(HeaderColumnKey xObject, YObject yObject, JComponent component) {
        int x = xMap.get(xObject);
        int y = yMap.get(yObject);
        add(component, new TimeTableLayoutConstraints(x, y, true));
    }

    public void addRowHeader(HeaderColumnKey xObject1, YObject yObject1, HeaderColumnKey xObject2, YObject yObject2,
            JComponent component) {
        int x1 = xMap.get(xObject1);
        int y1 = yMap.get(yObject1);
        int x2 = xMap.get(xObject2);
        int y2 = yMap.get(yObject2);
        add(component, new TimeTableLayoutConstraints(x1, y1, x2 - x1 + 1, y2 - y1 + 1, true));
    }

    public void addCell(XObject xObject, YObject yObject, JComponent component) {
        int x = xMap.get(xObject);
        int y = yMap.get(yObject);
        add(component, new TimeTableLayoutConstraints(x, y));
    }

    public void addCell(XObject xObject1, YObject yObject1, XObject xObject2, YObject yObject2, JComponent component) {
        int x1 = xMap.get(xObject1);
        int y1 = yMap.get(yObject1);
        int x2 = xMap.get(xObject2);
        int y2 = yMap.get(yObject2);
        add(component, new TimeTableLayoutConstraints(x1, y1, x2 - x1 + 1, y2 - y1 + 1));
    }

    // ************************************************************************
    // Scrollable methods
    // ************************************************************************

    @Override
    public Dimension getPreferredScrollableViewportSize() {
        return SolutionPanel.PREFERRED_SCROLLABLE_VIEWPORT_SIZE;
    }

    @Override
    public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) {
        return 20;
    }

    @Override
    public int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction) {
        return 20;
    }

    @Override
    public boolean getScrollableTracksViewportWidth() {
        if (getParent() instanceof JViewport) {
            return (getParent().getWidth() > getPreferredSize().width);
        }
        return false;
    }

    @Override
    public boolean getScrollableTracksViewportHeight() {
        if (getParent() instanceof JViewport) {
            return (getParent().getHeight() > getPreferredSize().height);
        }
        return false;
    }

    public enum HeaderColumnKey {
        HEADER_COLUMN_GROUP2,
        HEADER_COLUMN_GROUP1,
        HEADER_COLUMN,
        HEADER_COLUMN_EXTRA_PROPERTY_1,
        HEADER_COLUMN_EXTRA_PROPERTY_2,
        HEADER_COLUMN_EXTRA_PROPERTY_3,
        HEADER_COLUMN_EXTRA_PROPERTY_4,
        HEADER_COLUMN_EXTRA_PROPERTY_5,
        TRAILING_HEADER_COLUMN;
    }

    public enum HeaderRowKey {
        HEADER_ROW_GROUP2,
        HEADER_ROW_GROUP1,
        HEADER_ROW,
        TRAILING_HEADER_ROW;
    }

}