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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.
package org.optaplanner.examples.taskassigning.swingui;
import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ItemEvent;
import java.util.ArrayList;
import java.util.Comparator;
import java.util.List;
import java.util.Vector;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
import javax.swing.AbstractAction;
import javax.swing.BorderFactory;
import javax.swing.DefaultComboBoxModel;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JViewport;
import javax.swing.Scrollable;
import javax.swing.SwingConstants;
import org.optaplanner.examples.common.business.SolutionBusiness;
import org.optaplanner.examples.common.swingui.SolutionPanel;
import org.optaplanner.examples.common.swingui.components.LabeledComboBoxRenderer;
import org.optaplanner.examples.taskassigning.domain.Employee;
import org.optaplanner.examples.taskassigning.domain.Skill;
import org.optaplanner.examples.taskassigning.domain.Task;
import org.optaplanner.examples.taskassigning.domain.TaskAssigningSolution;
import org.optaplanner.swing.impl.SwingUtils;
import org.optaplanner.swing.impl.TangoColorFactory;
public class TaskOverviewPanel extends JPanel implements Scrollable {
public static final int HEADER_ROW_HEIGHT = 50;
public static final int HEADER_COLUMN_WIDTH = 150;
public static final int ROW_HEIGHT = 50;
public static final int TIME_COLUMN_WIDTH = 60;
private final TaskAssigningPanel taskAssigningPanel;
private final ImageIcon[] affinityIcons;
private final ImageIcon[] priorityIcons;
private TangoColorFactory skillColorFactory;
private int consumedDuration = 0;
public TaskOverviewPanel(TaskAssigningPanel taskAssigningPanel) {
this.taskAssigningPanel = taskAssigningPanel;
affinityIcons = new ImageIcon[] {
new ImageIcon(getClass().getResource("affinityNone.png")),
new ImageIcon(getClass().getResource("affinityLow.png")),
new ImageIcon(getClass().getResource("affinityMedium.png")),
new ImageIcon(getClass().getResource("affinityHigh.png"))
};
priorityIcons = new ImageIcon[] {
new ImageIcon(getClass().getResource("priorityMinor.png")),
new ImageIcon(getClass().getResource("priorityMajor.png")),
new ImageIcon(getClass().getResource("priorityCritical.png"))
};
setLayout(null);
setMinimumSize(new Dimension(HEADER_COLUMN_WIDTH * 2, ROW_HEIGHT * 8));
}
public void resetPanel(TaskAssigningSolution taskAssigningSolution) {
removeAll();
skillColorFactory = new TangoColorFactory();
List employeeList = taskAssigningSolution.getEmployeeList();
List unassignedTaskList = new ArrayList<>(taskAssigningSolution.getTaskList());
int rowIndex = 0;
for (Employee employee : employeeList) {
add(createEmployeeLabel(employee, rowIndex));
rowIndex++;
}
rowIndex = 0;
for (Employee employee : employeeList) {
for (Task task : employee.getTasks()) {
add(createTaskButton(task, rowIndex));
unassignedTaskList.remove(task);
}
rowIndex++;
}
for (Task task : unassignedTaskList) {
add(createTaskButton(task, rowIndex));
rowIndex++;
}
int maxUnassignedTaskDuration = unassignedTaskList.stream().mapToInt(Task::getDuration).max().orElse(0);
int maxEmployeeEndTime = employeeList.stream().mapToInt(Employee::getEndTime).max().orElse(0);
int taskTableWidth = Math.max(maxEmployeeEndTime, maxUnassignedTaskDuration + consumedDuration);
for (int timeGrain = 0; timeGrain < taskTableWidth; timeGrain += TIME_COLUMN_WIDTH) {
add(createTimeLabel(timeGrain));
}
if (taskTableWidth % TIME_COLUMN_WIDTH != 0) {
taskTableWidth += TIME_COLUMN_WIDTH - (taskTableWidth % TIME_COLUMN_WIDTH);
}
Dimension size = new Dimension(taskTableWidth + HEADER_COLUMN_WIDTH, HEADER_ROW_HEIGHT + rowIndex * ROW_HEIGHT);
setSize(size);
setPreferredSize(size);
repaint();
}
public void setConsumedDuration(int consumedDuration) {
this.consumedDuration = consumedDuration;
repaint();
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
g.setColor(TangoColorFactory.ALUMINIUM_2);
int lineX = HEADER_COLUMN_WIDTH + consumedDuration;
g.fillRect(HEADER_COLUMN_WIDTH, 0, lineX, getHeight());
g.setColor(Color.WHITE);
g.fillRect(lineX, 0, getWidth(), getHeight());
}
private JLabel createEmployeeLabel(Employee employee, int rowIndex) {
JLabel employeeLabel = new JLabel(employee.getLabel(), new TaskOrEmployeeIcon(employee), SwingConstants.LEFT);
employeeLabel.setOpaque(true);
employeeLabel.setToolTipText(employee.getToolText());
employeeLabel.setLocation(0, HEADER_ROW_HEIGHT + rowIndex * ROW_HEIGHT);
employeeLabel.setSize(HEADER_COLUMN_WIDTH, ROW_HEIGHT);
employeeLabel.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
return employeeLabel;
}
private JButton createTaskButton(Task task, int rowIndex) {
JButton taskButton = SwingUtils.makeSmallButton(new JButton(new TaskAction(task)));
taskButton.setBackground(TangoColorFactory.ALUMINIUM_1);
taskButton.setHorizontalTextPosition(SwingConstants.CENTER);
taskButton.setVerticalTextPosition(SwingConstants.TOP);
taskButton.setSize(task.getDuration(), ROW_HEIGHT);
int x = HEADER_COLUMN_WIDTH + (task.getEmployee() == null ? task.getReadyTime() : task.getStartTime());
int y = HEADER_ROW_HEIGHT + rowIndex * ROW_HEIGHT;
taskButton.setLocation(x, y);
return taskButton;
}
private JLabel createTimeLabel(int timeGrain) {
// Use 10 hours per day
int minutesInDay = timeGrain % (10 * 60);
// Start at 8:00
int hours = 8 + (minutesInDay / 60);
int minutesInHour = minutesInDay % 60;
JLabel timeLabel = new JLabel(String.format("%02d:%02d", hours, minutesInHour));
timeLabel.setBorder(BorderFactory.createLineBorder(Color.BLACK, 1));
timeLabel.setLocation(timeGrain + HEADER_COLUMN_WIDTH, 0);
timeLabel.setSize(TIME_COLUMN_WIDTH, ROW_HEIGHT);
return timeLabel;
}
private class TaskAction extends AbstractAction {
private final Task task;
public TaskAction(Task task) {
super(task.getCode(), new TaskOrEmployeeIcon(task));
this.task = task;
// Tooltip
putValue(SHORT_DESCRIPTION, task.getToolText());
}
@Override
public void actionPerformed(ActionEvent e) {
JComboBox indexListField = new JComboBox<>();
JComboBox employeeListField = new JComboBox<>(
new Vector<>(taskAssigningPanel.getSolution().getEmployeeList()));
employeeListField.addItemListener(itemEvent -> {
if (itemEvent.getStateChange() == ItemEvent.SELECTED) {
// When en employee is selected, populate the index combo with indexes in the selected employee's task list.
indexListField.setModel(new DefaultComboBoxModel<>(availableIndexes((Employee) itemEvent.getItem())));
}
});
LabeledComboBoxRenderer.applyToComboBox(employeeListField);
selectCurrentEmployee(employeeListField);
JCheckBox unassignCheckBox = new JCheckBox("Or unassign.");
unassignCheckBox.addActionListener(checkBoxEvent -> {
employeeListField.setEnabled(!unassignCheckBox.isSelected());
indexListField.setEnabled(!unassignCheckBox.isSelected());
});
unassignCheckBox.setVisible(task.getEmployee() != null);
JPanel listFieldsPanel = new JPanel(new GridLayout(4, 1));
listFieldsPanel.add(new JLabel("Select employee and index:"));
listFieldsPanel.add(employeeListField);
listFieldsPanel.add(indexListField);
listFieldsPanel.add(unassignCheckBox);
int result = JOptionPane.showConfirmDialog(TaskOverviewPanel.this.getRootPane(),
listFieldsPanel, "Move " + task.getCode(),
JOptionPane.OK_CANCEL_OPTION);
if (result == JOptionPane.OK_OPTION) {
Employee selectedEmployee = (Employee) employeeListField.getSelectedItem();
Integer selectedIndex = (Integer) indexListField.getSelectedItem();
doProblemChange(selectedEmployee, selectedIndex, unassignCheckBox.isSelected());
taskAssigningPanel.getSolverAndPersistenceFrame().resetScreen();
}
}
private Vector availableIndexes(Employee selectedEmployee) {
int availableIndexes = selectedEmployee.getTasks().size();
if (selectedEmployee == task.getEmployee()) {
availableIndexes--;
}
return IntStream.rangeClosed(0, availableIndexes)
.boxed()
.collect(Collectors.toCollection(Vector::new));
}
private void selectCurrentEmployee(JComboBox employeeListField) {
// Without selecting null first, the next select wouldn't call the item listener if the selected employee
// is the first on the list (and the index combo wouldn't be populated).
employeeListField.setSelectedItem(null);
if (task.getEmployee() == null) {
employeeListField.setSelectedIndex(0);
} else {
employeeListField.setSelectedItem(task.getEmployee());
}
}
private void doProblemChange(Employee selectedEmployee, Integer selectedIndex, boolean unassignTask) {
SolutionBusiness solutionBusiness = taskAssigningPanel.getSolutionBusiness();
if (unassignTask) {
solutionBusiness.doProblemChange(
(workingSolution, problemChangeDirector) -> problemChangeDirector.changeVariable(selectedEmployee,
"tasks",
e -> e.getTasks().remove((int) selectedIndex)));
} else {
if (task.getEmployee() == null) {
solutionBusiness.doProblemChange(
(workingSolution, problemChangeDirector) -> problemChangeDirector.changeVariable(selectedEmployee,
"tasks",
e -> e.getTasks().add(selectedIndex, task)));
} else {
solutionBusiness.doProblemChange((workingSolution, problemChangeDirector) -> {
Task workingTask = problemChangeDirector.lookUpWorkingObjectOrFail(task);
problemChangeDirector.changeVariable(task.getEmployee(), "tasks",
e -> e.getTasks().remove(workingTask));
problemChangeDirector.changeVariable(selectedEmployee, "tasks",
e -> e.getTasks().add(selectedIndex, workingTask));
});
}
}
}
}
@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;
}
private class TaskOrEmployeeIcon implements Icon {
private static final int SKILL_ICON_WIDTH = 8;
private static final int SKILL_ICON_HEIGHT = 16;
private final ImageIcon priorityIcon;
private final List skillColorList;
private final ImageIcon affinityIcon;
private TaskOrEmployeeIcon(Task task) {
priorityIcon = priorityIcons[task.getPriority().ordinal()];
skillColorList = task.getTaskType().getRequiredSkillList().stream()
.map(skillColorFactory::pickColor)
.collect(Collectors.toList());
affinityIcon = affinityIcons[task.getAffinity().ordinal()];
}
private TaskOrEmployeeIcon(Employee employee) {
priorityIcon = null;
skillColorList = employee.getSkillSet().stream()
.sorted(Comparator.comparing(Skill::getName))
.map(skillColorFactory::pickColor)
.collect(Collectors.toList());
affinityIcon = null;
}
@Override
public int getIconWidth() {
int width = 0;
if (priorityIcon != null) {
width += priorityIcon.getIconWidth();
}
width += skillColorList.size() * SKILL_ICON_WIDTH;
if (affinityIcon != null) {
width += affinityIcon.getIconWidth();
}
return width;
}
@Override
public int getIconHeight() {
int height = SKILL_ICON_HEIGHT;
if (priorityIcon != null && priorityIcon.getIconHeight() > height) {
height = priorityIcon.getIconHeight();
}
if (affinityIcon != null && affinityIcon.getIconHeight() > height) {
height = affinityIcon.getIconHeight();
}
return height;
}
@Override
public void paintIcon(Component c, Graphics g, int x, int y) {
int innerX = x;
if (priorityIcon != null) {
priorityIcon.paintIcon(c, g, innerX, y);
innerX += priorityIcon.getIconWidth();
}
for (Color skillColor : skillColorList) {
g.setColor(skillColor);
g.fillRect(innerX + 1, y + 1, SKILL_ICON_WIDTH - 2, SKILL_ICON_HEIGHT - 2);
g.setColor(TangoColorFactory.ALUMINIUM_5);
g.drawRect(innerX + 1, y + 1, SKILL_ICON_WIDTH - 2, SKILL_ICON_HEIGHT - 2);
innerX += SKILL_ICON_WIDTH;
}
if (affinityIcon != null) {
affinityIcon.paintIcon(c, g, innerX, y);
innerX += affinityIcon.getIconWidth();
}
}
}
}