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Re: What do you think of my CropImage class

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From Eric Sosman <esosman@comcast-dot-net.invalid>
Newsgroups comp.lang.java.programmer
Subject Re: What do you think of my CropImage class
Date Thu, 21 Jul 2016 12:39:29 -0400
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On 7/21/2016 12:03 PM, Eric Douglas wrote:
> On Thursday, July 21, 2016 at 9:35:39 AM UTC-4, Eric Sosman wrote:
>>      I have not studied your code closely, but one thing jumps out:
>> You're doing Swingthings on the wrong thread.  Almost all of Swing
>> is thread-unsafe, and almost all manipulation of Swing objects
>> must occur on the Event Dispatching Thread, or EDT.  Your code
>> breaches this requirement:
>
> Displaying an image needs to be done on the EDT but can you generate the image in a background thread?  Does it come up headless?

     The image itself is not a Swing component, and has no necessary
affiliation with the EDT.  Presumably, the image will eventually be
painted onto a Graphics instance associated with a Swing component,
and that painting operation must happen on the EDT.

-- 
esosman@comcast-dot-net.invalid
"Don't be afraid of work. Make work afraid of you." -- TLM

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Thread

What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-20 09:15 +0200
  Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-20 11:12 +0200
  Re: What do you think of my CropImage class Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2016-07-20 10:02 -0700
    Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-20 21:14 +0200
      Re: What do you think of my CropImage class Eric Douglas <e.d.programmer@gmail.com> - 2016-07-20 12:50 -0700
        Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 12:11 +0200
          Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 14:19 +0200
      Re: What do you think of my CropImage class Qu0ll <qu0ll64@gmail.com> - 2016-07-21 05:53 +1000
      Re: What do you think of my CropImage class Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2016-07-20 13:46 -0700
        Re: What do you think of my CropImage class Eric Douglas <e.d.programmer@gmail.com> - 2016-07-20 13:59 -0700
          Re: What do you think of my CropImage class Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2016-07-20 15:40 -0700
          Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 12:27 +0200
            Re: What do you think of my CropImage class Eric Douglas <e.d.programmer@gmail.com> - 2016-07-21 05:17 -0700
              Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 17:43 +0200
                Re: What do you think of my CropImage class Eric Douglas <e.d.programmer@gmail.com> - 2016-07-21 08:59 -0700
                Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 19:10 +0200
                Re: What do you think of my CropImage class Arne Vajhøj <arne@vajhoej.dk> - 2016-07-23 21:47 -0400
                Re: What do you think of my CropImage class Eric Douglas <e.d.programmer@gmail.com> - 2016-07-25 04:51 -0700
                Re: What do you think of my CropImage class Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2016-07-25 15:01 -0700
                Re: What do you think of my CropImage class Arne Vajhøj <arne@vajhoej.dk> - 2016-07-25 21:06 -0400
                Re: What do you think of my CropImage class Arne Vajhøj <arne@vajhoej.dk> - 2016-07-25 21:09 -0400
            Re: What do you think of my CropImage class Nigel Wade <nmw@local.domain> - 2016-07-21 15:44 +0100
              Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 17:46 +0200
        Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 12:25 +0200
          Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 14:16 +0200
    Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 12:05 +0200
      Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 13:23 +0200
      Re: What do you think of my CropImage class Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2016-07-21 07:58 -0700
        Re: What do you think of my CropImage class Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-07-21 11:13 -0400
          Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 18:12 +0200
        Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 17:49 +0200
  Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 11:58 +0200
    Re: What do you think of my CropImage class Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-07-21 09:35 -0400
      Re: What do you think of my CropImage class Eric Douglas <e.d.programmer@gmail.com> - 2016-07-21 09:03 -0700
        Re: What do you think of my CropImage class Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-07-21 12:39 -0400
      Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 18:07 +0200
        Re: What do you think of my CropImage class Nigel Wade <nmw@local.domain> - 2016-07-21 17:23 +0100
        Re: What do you think of my CropImage class Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-07-21 12:56 -0400
      Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 19:03 +0200
        Re: What do you think of my CropImage class Eric Douglas <e.d.programmer@gmail.com> - 2016-07-21 10:25 -0700
          Re: What do you think of my CropImage class Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-07-21 14:24 -0400
            Re: What do you think of my CropImage class Eric Douglas <e.d.programmer@gmail.com> - 2016-07-21 11:54 -0700
          Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 20:25 +0200
            Re: What do you think of my CropImage class Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-07-21 15:37 -0400
              Re: What do you think of my CropImage class Martin Gregorie <martin@address-in-sig.invalid> - 2016-07-21 21:30 +0000
              Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 23:52 +0200
                Re: What do you think of my CropImage class Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-07-21 20:35 -0400
                Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-22 04:21 +0200
                Re: What do you think of my CropImage class Eric Sosman <esosman@comcast-dot-net.invalid> - 2016-07-21 22:44 -0400
                Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-22 10:27 +0200
                Re: What do you think of my CropImage class Martin Gregorie <martin@address-in-sig.invalid> - 2016-07-22 10:47 +0000
                Re: What do you think of my CropImage class Eric Douglas <e.d.programmer@gmail.com> - 2016-07-22 05:16 -0700
                Re: What do you think of my CropImage class Nigel Wade <nmw@local.domain> - 2016-07-22 15:10 +0100
                Re: What do you think of my CropImage class Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2016-07-22 07:47 -0700
                Re: What do you think of my CropImage class Eric Douglas <e.d.programmer@gmail.com> - 2016-07-22 10:21 -0700
    Re: What do you think of my CropImage class Knute Johnson <nospam@rabbitbrush.frazmtn.com> - 2016-07-21 08:30 -0700
      Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 18:19 +0200
        Re: What do you think of my CropImage class Eric Douglas <e.d.programmer@gmail.com> - 2016-07-21 10:18 -0700
          Re: What do you think of my CropImage class Cecil Westerhof <Cecil@decebal.nl> - 2016-07-21 20:12 +0200

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