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7130241: [macosx] TransparentRuler demo can not run due to lacking of perpixel transparency support

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Reviewed-by: art
This commit is contained in:
Alexander Kouznetsov 2012-03-02 12:24:35 +02:00
parent cbf5f3e4de
commit e44e04a5f5
1 changed files with 59 additions and 28 deletions
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87
jdk/src/share/demo/jfc/TransparentRuler/transparentruler/Ruler.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2011, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
@ -40,12 +40,9 @@
package transparentruler;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GraphicsDevice;
import java.awt.*;
import java.awt.GraphicsDevice.WindowTranslucency;
import java.awt.GraphicsEnvironment;
import static java.awt.GraphicsDevice.WindowTranslucency.*;
import java.awt.event.ActionEvent;
import java.awt.event.ComponentAdapter;
import java.awt.event.ComponentEvent;
@ -79,16 +76,32 @@ public class Ruler extends JFrame {
private static final int F_HEIGHT = 400;
private static final int F_WIDTH = (int) (F_HEIGHT * 1.618 + 0.5);
private static void checkTranslucencyMode(WindowTranslucency arg) {
private static boolean translucencySupported;
private static boolean transparencySupported;
private static boolean checkTranslucencyMode(WindowTranslucency arg) {
GraphicsEnvironment ge =
GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice gd = ge.getDefaultScreenDevice();
if (!gd.isWindowTranslucencySupported(arg)) {
System.err.println("'" + arg
+ "' translucency mode isn't supported.");
System.exit(-1);
}
return gd.isWindowTranslucencySupported(arg);
}
public Shape buildShape() {
int h = getHeight();
int w = getWidth();
float a = (float) Math.hypot(h, w);
Float path = new java.awt.geom.Path2D.Float();
path.moveTo(0, 0);
path.lineTo(w, 0);
path.lineTo(0, h);
path.closePath();
path.moveTo(W, W);
path.lineTo(W, h - W * (a + h) / w);
path.lineTo(w - W * (a + w) / h, W);
path.closePath();
return path;
}
private final ComponentAdapter componentListener = new ComponentAdapter() {
/**
@ -97,36 +110,32 @@ public class Ruler extends JFrame {
*/
@Override
public void componentResized(ComponentEvent e) {
int h = getHeight();
int w = getWidth();
float a = (float) Math.hypot(h, w);
Float path = new java.awt.geom.Path2D.Float();
path.moveTo(0, 0);
path.lineTo(w, 0);
path.lineTo(0, h);
path.closePath();
path.moveTo(W, W);
path.lineTo(W, h - W * (a + h) / w);
path.lineTo(w - W * (a + w) / h, W);
path.closePath();
setShape(path);
// We do apply shape only if PERPIXEL_TRANSPARENT is supported
if (transparencySupported) {
setShape(buildShape());
}
}
};
private final Action exitAction = new AbstractAction("Exit") {
{
putValue(Action.MNEMONIC_KEY, KeyEvent.VK_X);
}
@Override
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
};
private final JPopupMenu jPopupMenu = new JPopupMenu();
{
jPopupMenu.add(new JMenuItem(exitAction));
}
/**
* Implements mouse-related behavior: window dragging and popup menu
* invocation
@ -157,6 +166,7 @@ public class Ruler extends JFrame {
}
}
};
/**
* Implements keyboard navigation. Arrows move by 5 pixels, Ctrl + arrows
* move by 50 pixels, Alt + arrows move by 1 pixel.
@ -201,10 +211,22 @@ public class Ruler extends JFrame {
@Override
protected void paintComponent(Graphics g) {
Graphics gg = g.create();
Graphics2D gg = (Graphics2D) g.create();
int w = getWidth();
int h = getHeight();
int hh = gg.getFontMetrics().getAscent();
// This is an approach to apply shape when PERPIXEL_TRANSPARENT
// isn't supported
if (!transparencySupported) {
gg.setBackground(new Color(0, 0, 0, 0));
gg.clearRect(0, 0, w, h);
gg.clip(buildShape());
gg.setBackground(Ruler.this.getBackground());
gg.clearRect(0, 0, w, h);
}
gg.setColor(FOREGROUND);
for (int x = 0; x < w * (h - 8) / h - 5; x += 5) {
boolean hi = x % 50 == 0;
@ -216,6 +238,7 @@ public class Ruler extends JFrame {
gg.drawString(number, x + 5 - ww / 2, 20 + hh);
}
}
gg.dispose();
}
});
@ -231,9 +254,17 @@ public class Ruler extends JFrame {
SwingUtilities.invokeAndWait(new Runnable() {
@Override
public void run() {
checkTranslucencyMode(WindowTranslucency.PERPIXEL_TRANSLUCENT);
checkTranslucencyMode(WindowTranslucency.PERPIXEL_TRANSPARENT);
translucencySupported = checkTranslucencyMode(PERPIXEL_TRANSLUCENT);
transparencySupported = checkTranslucencyMode(PERPIXEL_TRANSPARENT);
if (!translucencySupported) {
System.err.println("This application requires "
+ "'PERPIXEL_TRANSLUCENT' translucency mode to "
+ "be supported.");
System.exit(-1);
}
Ruler ruler = new Ruler();
ruler.setVisible(true);