/**
* Copyright (C) 2015 Valkyrie RCP
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.valkyriercp.application.splash;
import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.font.FontRenderContext;
import java.awt.font.TextLayout;
import java.awt.geom.*;
/**
* Taken from a blog post by <a
* href="http://jroller.com/page/gfx?entry=wait_with_style_in_swing">Romain Guy</a>.
* <p>
* The only change is support for a background image.
*
* @author Romain Guy
*/
public class InfiniteProgressPanel extends JComponent implements MouseListener {
protected Area[] ticker = null;
protected Thread animation = null;
protected boolean started = false;
protected int alphaLevel = 0;
protected int rampDelay = 300;
protected float shield = 0.70f;
protected String text = "";
protected int barsCount = 14;
protected float fps = 15.0f;
private Image background;
protected RenderingHints hints = null;
public InfiniteProgressPanel() {
this("");
}
public InfiniteProgressPanel(String text) {
this(text, 14);
}
public InfiniteProgressPanel(String text, int barsCount) {
this(text, barsCount, 0.70f);
}
public InfiniteProgressPanel(String text, int barsCount, float shield) {
this(text, barsCount, shield, 15.0f);
}
public InfiniteProgressPanel(String text, int barsCount, float shield, float fps) {
this(text, barsCount, shield, fps, 300);
}
public InfiniteProgressPanel(String text, int barsCount, float shield, float fps, int rampDelay) {
this.text = text;
this.rampDelay = rampDelay >= 0 ? rampDelay : 0;
this.shield = shield >= 0.0f ? shield : 0.0f;
this.fps = fps > 0.0f ? fps : 15.0f;
this.barsCount = barsCount > 0 ? barsCount : 14;
this.hints = new RenderingHints(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
this.hints.put(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
this.hints.put(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON);
}
public void setText(String text) {
repaint();
this.text = text;
}
public String getText() {
return text;
}
public void start() {
addMouseListener(this);
setVisible(true);
ticker = buildTicker();
animation = new Thread(new Animator(true));
animation.start();
}
public void stop() {
if (animation != null) {
animation.interrupt();
animation = null;
animation = new Thread(new Animator(false));
animation.start();
}
}
public void interrupt() {
if (animation != null) {
animation.interrupt();
animation = null;
removeMouseListener(this);
setVisible(false);
}
}
public void paintComponent(Graphics g) {
if (started) {
int width = getWidth();
int height = getHeight();
double maxY = 0.0;
Graphics2D g2 = (Graphics2D) g;
g2.setRenderingHints(hints);
if (background != null) {
Point location = getLocationOnScreen();
g2.drawImage(background, -location.x, -location.y, null);
}
g2.setColor(new Color(255, 255, 255, (int) (alphaLevel * shield)));
g2.fillRect(0, 0, getWidth(), getHeight());
for (int i = 0; i < ticker.length; i++) {
int channel = 224 - 128 / (i + 1);
g2.setColor(new Color(channel, channel, channel, alphaLevel));
g2.fill(ticker[i]);
Rectangle2D bounds = ticker[i].getBounds2D();
if (bounds.getMaxY() > maxY)
maxY = bounds.getMaxY();
}
if (text != null && text.length() > 0) {
FontRenderContext context = g2.getFontRenderContext();
TextLayout layout = new TextLayout(text, getFont(), context);
Rectangle2D bounds = layout.getBounds();
g2.setColor(getForeground());
layout.draw(g2, (float) (width - bounds.getWidth()) / 2,
(float) (maxY + layout.getLeading() + 2 * layout.getAscent()));
}
}
}
private Area[] buildTicker() {
Area[] ticker = new Area[barsCount];
Point2D.Double center = new Point2D.Double((double) getWidth() / 2, (double) getHeight() / 2);
double fixedAngle = 2.0 * Math.PI / ((double) barsCount);
for (double i = 0.0; i < (double) barsCount; i++) {
Area primitive = buildPrimitive();
AffineTransform toCenter = AffineTransform.getTranslateInstance(center.getX(), center.getY());
AffineTransform toBorder = AffineTransform.getTranslateInstance(45.0, -6.0);
AffineTransform toCircle = AffineTransform.getRotateInstance(-i * fixedAngle, center.getX(), center.getY());
AffineTransform toWheel = new AffineTransform();
toWheel.concatenate(toCenter);
toWheel.concatenate(toBorder);
primitive.transform(toWheel);
primitive.transform(toCircle);
ticker[(int) i] = primitive;
}
return ticker;
}
private Area buildPrimitive() {
Rectangle2D.Double body = new Rectangle2D.Double(6, 0, 30, 12);
Ellipse2D.Double head = new Ellipse2D.Double(0, 0, 12, 12);
Ellipse2D.Double tail = new Ellipse2D.Double(30, 0, 12, 12);
Area tick = new Area(body);
tick.add(new Area(head));
tick.add(new Area(tail));
return tick;
}
protected class Animator implements Runnable {
private boolean rampUp = true;
protected Animator(boolean rampUp) {
this.rampUp = rampUp;
}
public void run() {
Point2D.Double center = new Point2D.Double((double) getWidth() / 2, (double) getHeight() / 2);
double fixedIncrement = 2.0 * Math.PI / ((double) barsCount);
AffineTransform toCircle = AffineTransform.getRotateInstance(fixedIncrement, center.getX(), center.getY());
long start = System.currentTimeMillis();
if (rampDelay == 0)
alphaLevel = rampUp ? 255 : 0;
started = true;
boolean inRamp = rampUp;
while (!Thread.interrupted()) {
if (!inRamp) {
for (int i = 0; i < ticker.length; i++)
ticker[i].transform(toCircle);
}
repaint();
if (rampUp) {
if (alphaLevel < 255) {
alphaLevel = (int) (255 * (System.currentTimeMillis() - start) / rampDelay);
if (alphaLevel >= 255) {
alphaLevel = 255;
inRamp = false;
}
}
}
else if (alphaLevel > 0) {
alphaLevel = (int) (255 - (255 * (System.currentTimeMillis() - start) / rampDelay));
if (alphaLevel <= 0) {
alphaLevel = 0;
break;
}
}
try {
Thread.sleep(inRamp ? 10 : (int) (1000 / fps));
}
catch (InterruptedException ie) {
break;
}
Thread.yield();
}
if (!rampUp) {
started = false;
repaint();
setVisible(false);
removeMouseListener(InfiniteProgressPanel.this);
}
}
}
public void mouseClicked(MouseEvent e) {
}
public void mousePressed(MouseEvent e) {
}
public void mouseReleased(MouseEvent e) {
}
public void mouseEntered(MouseEvent e) {
}
public void mouseExited(MouseEvent e) {
}
public void setBackground(Image background) {
this.background = background;
}
}