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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.common.swingui.timetable;
import java.awt.Component;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.LayoutManager2;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
final class TimeTableLayout implements LayoutManager2 {
public static final int FILL_COLLISIONS_FLAG = -1;
private List columns;
private List rows;
private List> cells;
private Map spanMap;
private boolean stale;
private int totalColumnWidth;
private int totalRowHeight;
public TimeTableLayout() {
reset();
}
public void reset() {
columns = new ArrayList<>();
rows = new ArrayList<>();
cells = new ArrayList<>();
spanMap = new HashMap<>();
stale = false;
totalColumnWidth = 0;
totalRowHeight = 0;
}
public int addColumn() {
return addColumn(true, 0);
}
public int addColumn(int baseWidth) {
if (baseWidth < 0) {
throw new IllegalArgumentException("Invalid baseWidth (" + baseWidth + ").");
}
return addColumn(false, baseWidth);
}
private int addColumn(boolean autoWidth, int baseWidth) {
if (rows.size() > 0) {
throw new IllegalStateException("Add all columns before adding rows");
}
stale = true;
int index = columns.size();
Column column = new Column(index, autoWidth, baseWidth);
columns.add(column);
cells.add(new ArrayList<>());
return index;
}
public int addRow() {
return addRow(true, 0);
}
public int addRow(int baseHeight) {
if (baseHeight < 0) {
throw new IllegalArgumentException("Invalid baseHeight (" + baseHeight + ").");
}
return addRow(false, baseHeight);
}
public int addRow(boolean autoHeight, int baseHeight) {
stale = true;
int index = rows.size();
Row row = new Row(index, autoHeight, baseHeight);
rows.add(row);
for (int i = 0; i < columns.size(); i++) {
Column column = columns.get(i);
cells.get(i).add(new Cell(column, row));
}
return index;
}
@Override
public void addLayoutComponent(Component component, Object o) {
TimeTableLayoutConstraints c = (TimeTableLayoutConstraints) o;
if (c.getXEnd() > columns.size()) {
throw new IllegalArgumentException("The xEnd (" + c.getXEnd()
+ ") is > columnsSize (" + columns.size() + ").");
}
if (c.getYEnd() > rows.size()) {
throw new IllegalArgumentException("The yEnd (" + c.getYEnd()
+ ") is > rowsSize (" + rows.size() + ").");
}
stale = true;
ComponentSpan span = new ComponentSpan(component);
spanMap.put(component, span);
span.topLeftCell = cells.get(c.getX()).get(c.getY());
span.bottomRightCell = cells.get(c.getXEnd() - 1).get(c.getYEnd() - 1);
Set occupiedCollisionIndexes = new HashSet<>();
for (int i = c.getX(); i < c.getXEnd(); i++) {
for (int j = c.getY(); j < c.getYEnd(); j++) {
Cell cell = cells.get(i).get(j);
cell.column.stale = true;
cell.row.stale = true;
cell.spans.add(span);
span.cells.add(cell);
occupiedCollisionIndexes.addAll(cell.occupiedCollisionIndexes);
}
}
Integer collisionIndex = 0;
while (occupiedCollisionIndexes.contains(collisionIndex)) {
collisionIndex++;
}
if (c.isFillCollisions()) {
if (collisionIndex != 0 || occupiedCollisionIndexes.contains(FILL_COLLISIONS_FLAG)) {
throw new IllegalArgumentException("There is a collision in the cell range ("
+ (c.getX() == c.getXEnd() - 1 ? c.getX() : c.getX() + "-" + (c.getXEnd() - 1))
+ ", " + (c.getY() == c.getYEnd() - 1 ? c.getY() : c.getY() + "-" + (c.getYEnd() - 1))
+ ").");
}
collisionIndex = FILL_COLLISIONS_FLAG;
}
span.collisionIndex = collisionIndex;
for (Cell cell : span.cells) {
cell.occupiedCollisionIndexes.add(collisionIndex);
}
}
@Override
public void addLayoutComponent(String name, Component component) {
// No effect
}
@Override
public void removeLayoutComponent(Component component) {
stale = true;
ComponentSpan span = spanMap.remove(component);
for (Cell cell : span.cells) {
cell.spans.remove(span);
cell.column.stale = true;
cell.row.stale = true;
cell.occupiedCollisionIndexes.remove(span.collisionIndex);
}
}
@Override
public Dimension minimumLayoutSize(Container parent) {
update();
return new Dimension(totalColumnWidth, totalRowHeight);
}
@Override
public Dimension preferredLayoutSize(Container parent) {
update();
return new Dimension(totalColumnWidth, totalRowHeight);
}
@Override
public Dimension maximumLayoutSize(Container target) {
update();
return new Dimension(totalColumnWidth, totalRowHeight);
}
@Override
public float getLayoutAlignmentX(Container target) {
return 0.5f;
}
@Override
public float getLayoutAlignmentY(Container target) {
return 0.5f;
}
@Override
public void invalidateLayout(Container target) {
// No effect
}
@Override
public void layoutContainer(Container parent) {
update();
synchronized (parent.getTreeLock()) {
for (ComponentSpan span : spanMap.values()) {
int x1 = span.topLeftCell.column.boundX;
int collisionIndexStart = (span.collisionIndex == FILL_COLLISIONS_FLAG)
? 0
: span.collisionIndex;
int y1 = span.topLeftCell.row.boundY + (collisionIndexStart * span.topLeftCell.row.baseHeight);
int x2 = span.bottomRightCell.column.boundX + span.bottomRightCell.column.baseWidth;
int collisionIndexEnd = (span.collisionIndex == FILL_COLLISIONS_FLAG)
? span.bottomRightCell.row.collisionCount
: span.collisionIndex + 1;
int y2 = span.bottomRightCell.row.boundY + (collisionIndexEnd * span.bottomRightCell.row.baseHeight);
span.component.setBounds(x1, y1, x2 - x1, y2 - y1);
}
}
}
public void update() {
if (!stale) {
return;
}
refreshColumns();
refreshRows();
stale = false;
}
private void refreshColumns() {
for (Column column : columns) {
if (column.stale) {
if (column.autoWidth) {
column.baseWidth = getMaxCellWidth(column);
}
column.stale = false;
}
}
refreshColumnsBoundX();
}
private int getMaxCellWidth(Column column) {
int maxCellWidth = 0;
for (int i = 0; i < rows.size(); i++) {
Cell cell = cells.get(column.index).get(i);
for (ComponentSpan span : cell.spans) {
int width = span.getPreferredWidthPerCell();
if (width > maxCellWidth) {
maxCellWidth = width;
}
}
}
return maxCellWidth;
}
private void refreshColumnsBoundX() {
int nextColumnBoundX = 0;
for (Column column : columns) {
column.boundX = nextColumnBoundX;
nextColumnBoundX += column.baseWidth;
}
totalColumnWidth = nextColumnBoundX;
}
private void refreshRows() {
for (Row row : rows) {
if (row.stale) {
if (row.autoHeight) {
row.baseHeight = getMaxCellHeight(row);
}
row.collisionCount = getMaxCollisionCount(row);
}
row.stale = false;
}
freshRowsBoundY();
}
private int getMaxCellHeight(Row row) {
int maxCellHeight = 0;
for (int i = 0; i < columns.size(); i++) {
Cell cell = cells.get(i).get(row.index);
for (ComponentSpan span : cell.spans) {
int height = span.getPreferredHeightPerCell();
if (height > maxCellHeight) {
maxCellHeight = height;
}
}
}
return maxCellHeight;
}
private int getMaxCollisionCount(Row row) {
int maxCollisionCount = 1;
for (int i = 0; i < columns.size(); i++) {
Cell cell = cells.get(i).get(row.index);
if (cell.occupiedCollisionIndexes.size() > maxCollisionCount) {
maxCollisionCount = cell.occupiedCollisionIndexes.size();
}
}
return maxCollisionCount;
}
private void freshRowsBoundY() {
int nextRowBoundY = 0;
for (Row row : rows) {
row.boundY = nextRowBoundY;
nextRowBoundY += row.baseHeight * row.collisionCount;
}
totalRowHeight = nextRowBoundY;
}
private static final class Column {
private final int index;
private final boolean autoWidth;
private boolean stale;
private int baseWidth;
private int boundX = -1;
private Column(int index, boolean autoWidth, int baseWidth) {
this.index = index;
this.autoWidth = autoWidth;
stale = true;
this.baseWidth = baseWidth;
}
}
private static final class Row {
private final int index;
private final boolean autoHeight;
private boolean stale;
private int baseHeight;
private int collisionCount = 1;
private int boundY = -1;
private Row(int index, boolean autoHeight, int baseHeight) {
this.index = index;
this.autoHeight = autoHeight;
stale = true;
this.baseHeight = baseHeight;
}
}
private static final class Cell {
private final Column column;
private final Row row;
private final Set spans = new HashSet<>();
private final Set occupiedCollisionIndexes = new HashSet<>();
private Cell(Column column, Row row) {
this.column = column;
this.row = row;
}
}
private static final class ComponentSpan {
private final Component component;
private final Set| cells = new HashSet<>();
private Cell topLeftCell;
private Cell bottomRightCell;
private Integer collisionIndex;
private ComponentSpan(Component component) {
this.component = component;
}
public int getPreferredWidthPerCell() {
int width = component.getPreferredSize().width;
int horizontalCellSize = bottomRightCell.column.index - topLeftCell.column.index + 1;
return (width + (horizontalCellSize - 1)) / horizontalCellSize; // Ceil rounding
}
public int getPreferredHeightPerCell() {
int height = component.getPreferredSize().height;
int verticalCellSize = bottomRightCell.row.index - topLeftCell.row.index + 1;
return (height + (verticalCellSize - 1)) / verticalCellSize; // Ceil rounding
}
}
}
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