さて、これは私が望んでいたよりも少し時間がかかりました（生後10ヶ月は忍耐力がありません）
基本的な概念は、ある期間にわたってある状態から別の状態に変化する必要があるという考えを中心に展開されます。
開始時刻と現在の時刻が与えられると、アニメーションが実行されている時間を計算でき、合計のアニメーション時間が与えられると、現在の進行状況が計算されます。
これ（およびいくつかの巧妙な計算）を使用して、開始状態からターゲット状態に向かって現在の状態を計算できます。
私も動きをしたので、少しやり過ぎかもしれませんが、基本的な前提は同じです。
アニメーションプロパティクラスに変更する必要のあるノードに関するステートフル情報を配置し、を使用しjavax.swing.Timerてアニメーションをチェックします（適度に安定した速度で）。次に、必要に応じて各ノードの状態を更新し、画面を再描画します。
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Point;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.text.NumberFormat;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
import javax.management.StringValueExp;
import javax.swing.JComponent;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class AnimateNode {
public static void main(String[] args) {
new AnimateNode();
}
public AnimateNode() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new NodePane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public interface Node {
public void paint(JComponent parent, Graphics2D g2d);
public void setColor(Color color);
public Color getColor();
public Node getParent();
public Node getLeft();
public Node getRight();
public void setLeftNode(Node node);
public void setRightNode(Node node);
public Point getLocation();
public void setLocation(Point p);
}
public class DefaultNode implements Node {
private int number;
private Node parent;
private Node left;
private Node right;
private Point location;
private Color color;
public DefaultNode(int number, Node parent) {
this.parent = parent;
color = UIManager.getColor("Panel.background");
this.number = number;
}
public void setLeftNode(Node left) {
this.left = left;
}
public void setRightNode(Node right) {
this.right = right;
}
public Node getParent() {
return parent;
}
public Node getLeft() {
return left;
}
public Node getRight() {
return right;
}
@Override
public Point getLocation() {
return location;
}
@Override
public void setLocation(Point location) {
this.location = location;
}
@Override
public void paint(JComponent parent, Graphics2D g2d) {
FontMetrics fm = g2d.getFontMetrics();
int radius = fm.getHeight();
Point p = getLocation();
int x = p.x - (radius / 2);
int y = p.y - (radius / 2);
Ellipse2D node = new Ellipse2D.Float(x, y, radius, radius);
g2d.setColor(getColor());
g2d.fill(node);
g2d.setColor(Color.GRAY);
g2d.draw(node);
String text = String.valueOf(number);
x = x + ((radius - fm.stringWidth(text)) / 2);
y = y + (((radius - fm.getHeight()) / 2) + fm.getAscent());
g2d.drawString(text, x, y);
}
@Override
public void setColor(Color color) {
this.color = color;
}
@Override
public Color getColor() {
return color;
}
@Override
public String toString() {
return number + " @ " + getLocation();
}
}
public class AnimationProperties {
private Point startPoint;
private Point targetPoint;
private Color startColor;
private Color endColor;
private Node node;
public AnimationProperties(Node node) {
this.node = node;
}
public Node getNode() {
return node;
}
public void setTargetColor(Color endColor) {
this.endColor = endColor;
}
public void setStartColor(Color startColor) {
this.startColor = startColor;
}
public void setStartPoint(Point startPoint) {
this.startPoint = startPoint;
}
public void setTargetPoint(Point targetPoint) {
this.targetPoint = targetPoint;
}
public Color getTargetColor() {
return endColor;
}
public Color getStartColor() {
return startColor;
}
public Point getStartPoint() {
return startPoint;
}
public Point getTargetPoint() {
return targetPoint;
}
public Point getLocation(float progress) {
return calculateProgress(getStartPoint(), getTargetPoint(), progress);
}
public Color getColor(float progress) {
return blend(getStartColor(), getTargetColor(), 1f - progress);
}
public void update(float progress) {
node.setLocation(getLocation(progress));
node.setColor(getColor(progress));
}
}
public class NodePane extends JPanel {
private int number;
private Node root;
private Map<Node, AnimationProperties> aniProperties;
private Timer animationTimer;
private Timer startTimer;
private long startTime;
private int runTime = 1000;
public NodePane() {
aniProperties = new HashMap<>(25);
root = addLeftNode(null);
root.setColor(getBackground());
addMouseListener(new MouseAdapter() {
private Random rand;
@Override
public void mouseClicked(MouseEvent e) {
generateNextNode(root);
revalidate();
// repaint();
}
protected void generateNextNode(Node parent) {
Node child = null;
if (rand == null) {
rand = new Random(System.currentTimeMillis());
}
boolean left = rand.nextBoolean();
if (left) {
child = parent.getLeft();
} else {
child = parent.getRight();
}
if (child == null) {
if (left) {
addLeftNode(parent);
} else {
addRightNode(parent);
}
} else {
generateNextNode(child);
}
}
});
startTimer = new Timer(250, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
stopAnimation();
startTime = -1;
animationTimer.start();
}
});
startTimer.setRepeats(false);
animationTimer = new Timer(40, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
if (startTime < 0) {
startTime = System.currentTimeMillis();
}
float progress = 1f;
long duration = System.currentTimeMillis() - startTime;
if (duration >= runTime) {
((Timer) e.getSource()).stop();
} else {
progress = (float) duration / (float) runTime;
}
for (AnimationProperties ap : aniProperties.values()) {
ap.update(progress);
}
repaint();
if (progress == 1f) {
aniProperties.clear();
}
}
});
animationTimer.setRepeats(true);
animationTimer.setCoalesce(true);
}
protected void stopAnimation() {
if (animationTimer.isRunning()) {
animationTimer.stop();
for (AnimationProperties ap : aniProperties.values()) {
Node node = ap.getNode();
ap.setStartColor(node.getColor());
ap.setStartPoint(node.getLocation());
}
}
}
public Point getStartPoint(Node node) {
Point startPoint = node.getLocation();
while (startPoint == null) {
node = node.getParent();
startPoint = node.getLocation();
}
return startPoint;
}
protected void layoutNode(Node node, int x, int y) {
if (node != null) {
FontMetrics fm = getFontMetrics(getFont());
int nodeHeight = fm.getHeight();
if (node.getParent() != null) {
Point p = new Point(x, y);
Point sp = getStartPoint(node);
if (node.getLocation() == null) {
System.out.println("new node " + node);
}
if (node.getLocation() == null || !p.equals(node.getLocation())) {
AnimationProperties ap = new AnimationProperties(node);
ap.setStartColor(node.getColor());
ap.setTargetColor(getBackground());
ap.setStartPoint(sp);
ap.setTargetPoint(new Point(x, y));
node.setLocation(sp);
aniProperties.put(node, ap);
System.out.println("New Node to " + node);
} else {
aniProperties.remove(node);
}
} else {
nodeHeight *= 2;
}
layoutNode(node.getLeft(), x - nodeHeight, y + nodeHeight);
layoutNode(node.getRight(), x + nodeHeight, y + nodeHeight);
}
}
@Override
public void doLayout() {
System.out.println("DoLayout");
stopAnimation();
FontMetrics fm = getFontMetrics(getFont());
int nodeHeight = fm.getHeight();
int x = getWidth() / 2;
int y = nodeHeight;
if (root != null) {
root.setLocation(new Point(x, y));
layoutNode(root, x, y);
// Node node = root.getLeft();
// while (node != null) {
// x -= nodeHeight;
// y += nodeHeight;
// layout(node, x, y);
// node = node.getLeft();
// }
// node = root.getRight();
// x = getWidth() / 2;
// y = nodeHeight;
// while (node != null) {
// x += nodeHeight;
// y += nodeHeight;
// layout(node, x, y);
// node = node.getRight();
// }
}
startTimer.restart();
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
protected Node createNode(Node parent) {
DefaultNode child = new DefaultNode(++number, parent);
child.setColor(Color.GREEN);
System.out.println("Create new node " + child);
return child;
}
protected Node addLeftNode(Node parent) {
Node node = createNode(parent);
if (parent != null) {
System.out.println("Add " + node + " to left of " + parent);
parent.setLeftNode(node);
}
return node;
}
protected Node addRightNode(Node parent) {
Node node = createNode(parent);
if (parent != null) {
System.out.println("Add " + node + " to right of " + parent);
parent.setRightNode(node);
}
return node;
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
if (root != null) {
Graphics2D g2d = (Graphics2D) g.create();
paintConnectors(root, g2d);
paintNode(root, g2d);
g2d.dispose();
}
}
protected void paintNode(Node node, Graphics2D g2d) {
if (node != null && node.getLocation() != null) {
node.paint(this, g2d);
paintNode(node.getLeft(), g2d);
paintNode(node.getRight(), g2d);
}
}
protected void paintConnectors(Node node, Graphics2D g2d) {
if (node != null && node.getLocation() != null) {
Node parent = node.getParent();
if (parent != null) {
g2d.setColor(Color.GRAY);
if (parent.getLocation() != null && node.getLocation() != null) {
g2d.draw(new Line2D.Float(parent.getLocation(), node.getLocation()));
}
}
paintConnectors(node.getLeft(), g2d);
paintConnectors(node.getRight(), g2d);
}
}
}
public static Point calculateProgress(Point startPoint, Point targetPoint, double progress) {
Point point = new Point();
if (startPoint != null && targetPoint != null) {
point.x = calculateProgress(startPoint.x, targetPoint.x, progress);
point.y = calculateProgress(startPoint.y, targetPoint.y, progress);
}
return point;
}
public static int calculateProgress(int startValue, int endValue, double fraction) {
int value = 0;
int distance = endValue - startValue;
value = (int) Math.round((double) distance * fraction);
value += startValue;
return value;
}
public static Color calculateProgress(Color start, Color target, double progress) {
return blend(start, target, progress);
}
public static Color blend(Color color1, Color color2, double ratio) {
float r = (float) ratio;
float ir = (float) 1.0 - r;
float rgb1[] = new float[3];
float rgb2[] = new float[3];
color1.getColorComponents(rgb1);
color2.getColorComponents(rgb2);
float red = rgb1[0] * r + rgb2[0] * ir;
float green = rgb1[1] * r + rgb2[1] * ir;
float blue = rgb1[2] * r + rgb2[2] * ir;
if (red < 0) {
red = 0;
} else if (red > 255) {
red = 255;
}
if (green < 0) {
green = 0;
} else if (green > 255) {
green = 255;
}
if (blue < 0) {
blue = 0;
} else if (blue > 255) {
blue = 255;
}
Color color = null;
try {
color = new Color(red, green, blue);
} catch (IllegalArgumentException exp) {
NumberFormat nf = NumberFormat.getNumberInstance();
System.err.println(nf.format(red) + "; " + nf.format(green) + "; " + nf.format(blue));
}
return color;
}
}
簡単な例で更新;）
さて、これは簡単な例です。基本的には、ノードを点滅させるだけです...
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.geom.Ellipse2D;
import java.text.NumberFormat;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.Timer;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class BlinkNode {
public static void main(String[] args) {
new BlinkNode();
}
public BlinkNode() {
EventQueue.invokeLater(new Runnable() {
@Override
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
}
JFrame frame = new JFrame("Testing");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.setLayout(new BorderLayout());
frame.add(new TestPane());
frame.pack();
frame.setLocationRelativeTo(null);
frame.setVisible(true);
}
});
}
public class TestPane extends JPanel {
// Animation stuff
private Timer aniTimer;
// The amount of time that each animation cycle plays for
// in millis
private int aniRunTime = 1000;
// The time the animation was started
private long startTime = -1;
// Our color ranges, where to start and where
// we want to get to and the current state...
private Color startColor;
private Color targetColor;
private Color color;
public TestPane() {
// Initial state
startColor = getBackground();
targetColor = Color.GREEN;
color = startColor;
aniTimer = new Timer(40, new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
// Set the start time it hasn't already
if (startTime < 0) {
startTime = System.currentTimeMillis();
}
// We're always finished if we run over time...
float progress = 1f;
// Calculate the duration of play
long duration = System.currentTimeMillis() - startTime;
// Have we reached the end yet??
if (duration >= aniRunTime) {
// Reset the start time, this allows the
// animation to cycle. Normally you would stop
// the timer, see the previous example
startTime = -1;
// Swap the start and target colors...
Color tmp = startColor;
startColor = targetColor;
targetColor = tmp;
color = startColor;
} else {
// Calculate the progress
progress = (float) duration / (float) aniRunTime;
// Blend the colors
color = blend(startColor, targetColor, 1f - progress);
}
// update the ui
repaint();
}
});
aniTimer.setRepeats(true);
aniTimer.setCoalesce(true);
aniTimer.start();
}
@Override
public Dimension getPreferredSize() {
return new Dimension(200, 200);
}
@Override
protected void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2d = (Graphics2D) g.create();
int x = (getWidth() - 20) / 2;
int y = (getHeight() - 20) / 2;
g2d.setColor(color);
Ellipse2D node = new Ellipse2D.Float(x, y, 20, 20);
g2d.fill(node);
g2d.setColor(Color.GRAY);
g2d.draw(node);
g2d.dispose();
}
}
public static Color blend(Color color1, Color color2, double ratio) {
float r = (float) ratio;
float ir = (float) 1.0 - r;
float rgb1[] = new float[3];
float rgb2[] = new float[3];
color1.getColorComponents(rgb1);
color2.getColorComponents(rgb2);
float red = rgb1[0] * r + rgb2[0] * ir;
float green = rgb1[1] * r + rgb2[1] * ir;
float blue = rgb1[2] * r + rgb2[2] * ir;
if (red < 0) {
red = 0;
} else if (red > 255) {
red = 255;
}
if (green < 0) {
green = 0;
} else if (green > 255) {
green = 255;
}
if (blue < 0) {
blue = 0;
} else if (blue > 255) {
blue = 255;
}
Color color = null;
try {
color = new Color(red, green, blue);
} catch (IllegalArgumentException exp) {
NumberFormat nf = NumberFormat.getNumberInstance();
System.err.println(nf.format(red) + "; " + nf.format(green) + "; " + nf.format(blue));
}
return color;
}
}
