Java example source code file (SmoothWheel.java)
The SmoothWheel.java Java example source code/*
* Copyright (c) 2007, 2008, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
@test %W% %E% %I%, %G%
@bug 6524352
@summary support for high-resolution mouse wheel
@author dmitry cherepanov: area=awt.event
@run main/manual SmoothWheel
*/
/**
* SmoothWheel.java
*
* summary:
*/
import java.awt.*;
import java.awt.event.*;
public class SmoothWheel
{
//*** test-writer defined static variables go here ***
private static void init()
{
String[] instructions =
{
"1. the test is for high-resolution mouse wheel only, ",
" refer to the cr# 6524352 for more info about such devices, ",
"2. you'll see a frame, the frame contains a checkbox, ",
"3. initially, the state of the checkbox is off, ",
" use mouse wheel over the frame, ",
" and the frame will change its size gradually, ",
"4. turn on the checkbox, ",
" use mouse wheel again over the frame, ",
" now the frame will change its size smoothly, ",
"5. if the frame has always the same size or",
" if the frame changes its size equally in 3,4 cases, ",
" then the test failed. Otherwise, it passed."
};
Sysout.createDialog( );
Sysout.printInstructions( instructions );
final Frame frame = new Frame();
final Checkbox checkbox = new Checkbox("smooth wheel?");
checkbox.setState(false);
frame.setLayout (new FlowLayout());
frame.add(checkbox);
frame.addMouseWheelListener(new MouseWheelListener() {
public void mouseWheelMoved(MouseWheelEvent e) {
Sysout.println(e.toString());
double wheelRotation = 0;
if (checkbox.getState()) {
wheelRotation = e.getPreciseWheelRotation();
} else {
wheelRotation = e.getWheelRotation();
}
Dimension size = frame.getSize();
size.width += 10 * wheelRotation;
size.height += 10 * wheelRotation;
frame.setSize(size);
}
});
frame.setBounds(200, 200, 200, 200);
frame.setVisible(true);
}//End init()
/*****************************************************
* Standard Test Machinery Section
* DO NOT modify anything in this section -- it's a
* standard chunk of code which has all of the
* synchronisation necessary for the test harness.
* By keeping it the same in all tests, it is easier
* to read and understand someone else's test, as
* well as insuring that all tests behave correctly
* with the test harness.
* There is a section following this for test-defined
* classes
******************************************************/
private static boolean theTestPassed = false;
private static boolean testGeneratedInterrupt = false;
private static String failureMessage = "";
private static Thread mainThread = null;
private static int sleepTime = 300000;
public static void main( String args[] ) throws InterruptedException
{
mainThread = Thread.currentThread();
try
{
init();
}
catch( TestPassedException e )
{
//The test passed, so just return from main and harness will
// interepret this return as a pass
return;
}
//At this point, neither test passed nor test failed has been
// called -- either would have thrown an exception and ended the
// test, so we know we have multiple threads.
//Test involves other threads, so sleep and wait for them to
// called pass() or fail()
try
{
Thread.sleep( sleepTime );
//Timed out, so fail the test
throw new RuntimeException( "Timed out after " + sleepTime/1000 + " seconds" );
}
catch (InterruptedException e)
{
if( ! testGeneratedInterrupt ) throw e;
//reset flag in case hit this code more than once for some reason (just safety)
testGeneratedInterrupt = false;
if ( theTestPassed == false )
{
throw new RuntimeException( failureMessage );
}
}
}//main
public static synchronized void setTimeoutTo( int seconds )
{
sleepTime = seconds * 1000;
}
public static synchronized void pass()
{
Sysout.println( "The test passed." );
Sysout.println( "The test is over, hit Ctl-C to stop Java VM" );
//first check if this is executing in main thread
if ( mainThread == Thread.currentThread() )
{
//Still in the main thread, so set the flag just for kicks,
// and throw a test passed exception which will be caught
// and end the test.
theTestPassed = true;
throw new TestPassedException();
}
//pass was called from a different thread, so set the flag and interrupt
// the main thead.
theTestPassed = true;
testGeneratedInterrupt = true;
if (mainThread != null){
mainThread.interrupt();
}
}//pass()
public static synchronized void fail()
{
//test writer didn't specify why test failed, so give generic
fail( "it just plain failed! :-)" );
}
public static synchronized void fail( String whyFailed )
{
Sysout.println( "The test failed: " + whyFailed );
Sysout.println( "The test is over, hit Ctl-C to stop Java VM" );
//check if this called from main thread
if ( mainThread == Thread.currentThread() )
{
//If main thread, fail now 'cause not sleeping
throw new RuntimeException( whyFailed );
}
theTestPassed = false;
testGeneratedInterrupt = true;
failureMessage = whyFailed;
mainThread.interrupt();
}//fail()
}// class ManualMainTest
//This exception is used to exit from any level of call nesting
// when it's determined that the test has passed, and immediately
// end the test.
class TestPassedException extends RuntimeException
{
}
//*********** End Standard Test Machinery Section **********
//************ Begin classes defined for the test ****************
// make listeners in a class defined here, and instantiate them in init()
/* Example of a class which may be written as part of a test
class NewClass implements anInterface
{
static int newVar = 0;
public void eventDispatched(AWTEvent e)
{
//Counting events to see if we get enough
eventCount++;
if( eventCount == 20 )
{
//got enough events, so pass
ManualMainTest.pass();
}
else if( tries == 20 )
{
//tried too many times without getting enough events so fail
ManualMainTest.fail();
}
}// eventDispatched()
}// NewClass class
*/
//************** End classes defined for the test *******************
/****************************************************
Standard Test Machinery
DO NOT modify anything below -- it's a standard
chunk of code whose purpose is to make user
interaction uniform, and thereby make it simpler
to read and understand someone else's test.
****************************************************/
/**
This is part of the standard test machinery.
It creates a dialog (with the instructions), and is the interface
for sending text messages to the user.
To print the instructions, send an array of strings to Sysout.createDialog
WithInstructions method. Put one line of instructions per array entry.
To display a message for the tester to see, simply call Sysout.println
with the string to be displayed.
This mimics System.out.println but works within the test harness as well
as standalone.
*/
class Sysout
{
private static TestDialog dialog;
private static boolean numbering = false;
private static int messageNumber = 0;
public static void createDialogWithInstructions( String[] instructions )
{
dialog = new TestDialog( new Frame(), "Instructions" );
dialog.printInstructions( instructions );
dialog.setVisible(true);
println( "Any messages for the tester will display here." );
}
public static void createDialog( )
{
dialog = new TestDialog( new Frame(), "Instructions" );
String[] defInstr = { "Instructions will appear here. ", "" } ;
dialog.printInstructions( defInstr );
dialog.setVisible(true);
println( "Any messages for the tester will display here." );
}
/* Enables message counting for the tester. */
public static void enableNumbering(boolean enable){
numbering = enable;
}
public static void printInstructions( String[] instructions )
{
dialog.printInstructions( instructions );
}
public static void println( String messageIn )
{
if (numbering) {
messageIn = "" + messageNumber + " " + messageIn;
messageNumber++;
}
dialog.displayMessage( messageIn );
}
}// Sysout class
/**
This is part of the standard test machinery. It provides a place for the
test instructions to be displayed, and a place for interactive messages
to the user to be displayed.
To have the test instructions displayed, see Sysout.
To have a message to the user be displayed, see Sysout.
Do not call anything in this dialog directly.
*/
class TestDialog extends Dialog implements ActionListener
{
TextArea instructionsText;
TextArea messageText;
int maxStringLength = 80;
Panel buttonP = new Panel();
Button passB = new Button( "pass" );
Button failB = new Button( "fail" );
//DO NOT call this directly, go through Sysout
public TestDialog( Frame frame, String name )
{
super( frame, name );
int scrollBoth = TextArea.SCROLLBARS_BOTH;
instructionsText = new TextArea( "", 15, maxStringLength, scrollBoth );
add( "North", instructionsText );
messageText = new TextArea( "", 5, maxStringLength, scrollBoth );
add("Center", messageText);
passB = new Button( "pass" );
passB.setActionCommand( "pass" );
passB.addActionListener( this );
buttonP.add( "East", passB );
failB = new Button( "fail" );
failB.setActionCommand( "fail" );
failB.addActionListener( this );
buttonP.add( "West", failB );
add( "South", buttonP );
pack();
setVisible(true);
}// TestDialog()
//DO NOT call this directly, go through Sysout
public void printInstructions( String[] instructions )
{
//Clear out any current instructions
instructionsText.setText( "" );
//Go down array of instruction strings
String printStr, remainingStr;
for( int i=0; i < instructions.length; i++ )
{
//chop up each into pieces maxSringLength long
remainingStr = instructions[ i ];
while( remainingStr.length() > 0 )
{
//if longer than max then chop off first max chars to print
if( remainingStr.length() >= maxStringLength )
{
//Try to chop on a word boundary
int posOfSpace = remainingStr.
lastIndexOf( ' ', maxStringLength - 1 );
if( posOfSpace <= 0 ) posOfSpace = maxStringLength - 1;
printStr = remainingStr.substring( 0, posOfSpace + 1 );
remainingStr = remainingStr.substring( posOfSpace + 1 );
}
//else just print
else
{
printStr = remainingStr;
remainingStr = "";
}
instructionsText.append( printStr + "\n" );
}// while
}// for
}//printInstructions()
//DO NOT call this directly, go through Sysout
public void displayMessage( String messageIn )
{
messageText.append( messageIn + "\n" );
System.out.println(messageIn);
}
//catch presses of the passed and failed buttons.
//simply call the standard pass() or fail() static methods of
//ManualMainTest
public void actionPerformed( ActionEvent e )
{
if( e.getActionCommand() == "pass" )
{
SmoothWheel.pass();
}
else
{
SmoothWheel.fail();
}
}
}// TestDialog class
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