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Stopwatch

Kind of class:	public class
Package:	org.casalib.time
Inherits from:	none
Implements:	IResumable
Known subclasses:	FrameTimeStopwatch
Version:	10/25/08
Author:	Aaron Clinger, Mike Creighton
Classpath:	org.casalib.time.Stopwatch
File last modified:	Monday, 01 December 2008, 11:16:36

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/*
    CASA Lib for ActionScript 3.0
    Copyright (c) 2008, Aaron Clinger & Contributors of CASA Lib
    All rights reserved.
    
    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions are met:
    
    - Redistributions of source code must retain the above copyright notice,
      this list of conditions and the following disclaimer.
    
    - Redistributions in binary form must reproduce the above copyright notice,
      this list of conditions and the following disclaimer in the documentation
      and/or other materials provided with the distribution.
    
    - Neither the name of the CASA Lib nor the names of its contributors
      may be used to endorse or promote products derived from this software
      without specific prior written permission.
    
    THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
    AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
    LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
    CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
    SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
    INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
    CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
    POSSIBILITY OF SUCH DAMAGE.
*/
package org.casalib.time {
    import flash.utils.getTimer;
    import org.casalib.control.IResumable;
    
    /**
        Simple stopwatch class that records elapsed time in milliseconds.
        
        @author Aaron Clinger
        @author Mike Creighton
        @version 10/25/08
        @example
            <code>
                package {
                    import flash.display.MovieClip;
                    import org.casalib.time.Stopwatch;
                    
                    
                    public class MyExample extends MovieClip {
                        
                        public function MyExample() {
                            super();
                            
                            var stopwatch:Stopwatch = new Stopwatch();
                            stopwatch.start();
                            
                            var l:uint = 1000000;
                            while (l--) {
                                doSomething();
                            }
                            
                            trace(stopwatch.time);
                        }
                        
                        public function doSomething():void {
                            
                        }
                    }
                }
            </code>
    */
    public class Stopwatch implements IResumable {
        protected var _elapsedTime:int;
        protected var _startTime:int;
        protected var _stopped:Boolean;
        
        
        /**
            Creates a new Stopwatch.
        */
        public function Stopwatch() {
            super();
        }
        
        /**
            Starts stopwatch and resets previous elapsed time.
        */
        public function start():void {
            this._elapsedTime = 0;
            this._startTime   = this._timer;
            this._stopped     = false;
        }
            
        /**
            Stops stopwatch.
        */
        public function stop():void {
            this._elapsedTime = this.time;
            this._startTime   = 0;
            this._stopped     = true;
        }
        
        /**
            Resumes stopwatch from {@link Stopwatch#stop}.
        */
        public function resume():void {
            if (this._stopped)
                this._startTime = this._timer;
        }
        
        /**
            Gets the time elapsed since {@link Stopwatch#start} or until {@link Stopwatch#stop} was called.
            
            @return Returns the elapsed time in milliseconds.
            @usageNote Can be called before or after calling {@link Stopwatch#stop}.
        */
        public function get time():int {
            return (this._startTime != 0) ? this._timer - this._startTime + this._elapsedTime : this._elapsedTime;
        }
        
        protected function get _timer():int {
            return getTimer();
        }
    }
}

Simple stopwatch class that records elapsed time in milliseconds.

Example:

package {
    import flash.display.MovieClip;
    import org.casalib.time.Stopwatch;


    public class MyExample extends MovieClip {

        public function MyExample() {
            super();

            var stopwatch:Stopwatch = new Stopwatch();
            stopwatch.start();

            var l:uint = 1000000;
            while (l--) {
                doSomething();
            }

            trace(stopwatch.time);
        }

        public function doSomething():void {

        }
    }
}

Summary

Constructor

Stopwatch

Instance properties

time : int
- Gets the time elapsed since start or until stop was called.

Instance methods

start : void
- Starts stopwatch and resets previous elapsed time.
stop : void
- Stops stopwatch.
resume : void
- Resumes stopwatch from stop.

Constructor

Stopwatch

public function Stopwatch (

)

Creates a new Stopwatch.

Instance properties

time

public time:int

(read)

Gets the time elapsed since start or until stop was called.

Returns:

Returns the elapsed time in milliseconds.

Usage note:

Can be called before or after calling stop.

Instance methods

resume

public function resume (

) : void

Resumes stopwatch from stop.

Specified by:

IResumable.resume

start

public function start (

) : void

Starts stopwatch and resets previous elapsed time.

Specified by:

IRunnable.start

stop

public function stop (

) : void

Stops stopwatch.

Specified by:

IRunnable.stop