Thread View: borland.public.jbuilder.java.swing
8 messages
8 total messages
Started by Alexei A. Akimov
Thu, 29 Jul 2004 12:10
JTextArea problem
Author: Alexei A. Akimov
Date: Thu, 29 Jul 2004 12:10
Date: Thu, 29 Jul 2004 12:10
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Dear expert, I have a problem with JTextArea component. Suppose it is placed on a JScrollPane and contains 20 or 30 lines of text. If I positin the caret at the beginning of text and move it (using keyboard) down holding the Shift button down then I make some selection in the text. The problem is that the operation is very slow (program waits while the selection is being repainted). If I seelct the same fragment using mouse it is not slow. I use the default setting for the JTextArea component except LineWrap property is set true. Any ideas? Best regards, Alexei Akimov
Re: JTextArea problem
Author: Tad Frysinger
Date: Fri, 06 Aug 2004 15:15
Date: Fri, 06 Aug 2004 15:15
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Alexei A. Akimov wrote: > Dear expert, > > I have a problem with JTextArea component. Suppose it is placed on a > JScrollPane and contains 20 or 30 lines of text. If I positin the caret > at the beginning of text and move it (using keyboard) down holding the > Shift button down then I make some selection in the text. The problem is > that the operation is very slow (program waits while the selection is > being repainted). If I seelct the same fragment using mouse it is not > slow. I use the default setting for the JTextArea component except > LineWrap property is set true. Any ideas? > > Best regards, > Alexei Akimov > Which JDK are you using? I can create a JTextArea in a JSCrollPane using the 1.4.2_01-b06 JDK and I created 50 lines of text and did various keyboard based selections. Seemed pretty snappy to me... Tad Frysinger (TeamB)
Re: JTextArea problem
Author: Alexei A. Akimov
Date: Mon, 09 Aug 2004 11:16
Date: Mon, 09 Aug 2004 11:16
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Tad Frysinger ?????: > Alexei A. Akimov wrote: > >> Dear expert, >> >> I have a problem with JTextArea component. Suppose it is placed on a >> JScrollPane and contains 20 or 30 lines of text. If I positin the >> caret at the beginning of text and move it (using keyboard) down >> holding the Shift button down then I make some selection in the text. >> The problem is that the operation is very slow (program waits while >> the selection is being repainted). If I seelct the same fragment using >> mouse it is not slow. I use the default setting for the JTextArea >> component except LineWrap property is set true. Any ideas? >> >> Best regards, >> Alexei Akimov >> > Which JDK are you using? I can create a JTextArea in a JSCrollPane using > the 1.4.2_01-b06 JDK and I created 50 lines of text and did various > keyboard based selections. Seemed pretty snappy to me... > > Tad Frysinger (TeamB) Thank You, I use JDK 1.4.1_02=b06 for Linux, JBuilder 9. Yes I use the teaxt area insiade the JScrollPane. No special tunning of the components was performed. All the properties have their default values. May be some setting should be made? Best regards, Alexei Akimov.
Re: JTextArea problem
Author: Tad Frysinger
Date: Tue, 10 Aug 2004 20:49
Date: Tue, 10 Aug 2004 20:49
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Alexei A. Akimov wrote: > Tad Frysinger ?????: > >> Alexei A. Akimov wrote: >> >>> Dear expert, >>> >>> I have a problem with JTextArea component. Suppose it is placed on a >>> JScrollPane and contains 20 or 30 lines of text. If I positin the >>> caret at the beginning of text and move it (using keyboard) down >>> holding the Shift button down then I make some selection in the text. >>> The problem is that the operation is very slow (program waits while >>> the selection is being repainted). If I seelct the same fragment >>> using mouse it is not slow. I use the default setting for the >>> JTextArea component except LineWrap property is set true. Any ideas? >>> >>> Best regards, >>> Alexei Akimov >>> >> Which JDK are you using? I can create a JTextArea in a JSCrollPane >> using the 1.4.2_01-b06 JDK and I created 50 lines of text and did >> various keyboard based selections. Seemed pretty snappy to me... >> >> Tad Frysinger (TeamB) > > Thank You, > > I use JDK 1.4.1_02=b06 for Linux, JBuilder 9. Yes I use the teaxt area > insiade the JScrollPane. No special tunning of the components was > performed. All the properties have their default values. May be some > setting should be made? > > Best regards, > Alexei Akimov. > Is your 20-30 lines of text actually all one line that is wrapped? There are known problems with performance on longer single lines (although usually these are in the hundreds, or at least dozens of lines). Tad Frysinger (TeamB)
Re: JTextArea problem
Author: Alexei A. Akimov
Date: Wed, 11 Aug 2004 08:37
Date: Wed, 11 Aug 2004 08:37
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Tad Frysinger ?????: > Alexei A. Akimov wrote: > >> Tad Frysinger ?????: >> >>> Alexei A. Akimov wrote: >>> >>>> Dear expert, >>>> >>>> I have a problem with JTextArea component. Suppose it is placed on a >>>> JScrollPane and contains 20 or 30 lines of text. If I positin the >>>> caret at the beginning of text and move it (using keyboard) down >>>> holding the Shift button down then I make some selection in the >>>> text. The problem is that the operation is very slow (program waits >>>> while the selection is being repainted). If I seelct the same >>>> fragment using mouse it is not slow. I use the default setting for >>>> the JTextArea component except LineWrap property is set true. Any >>>> ideas? >>>> >>>> Best regards, >>>> Alexei Akimov >>>> >>> Which JDK are you using? I can create a JTextArea in a JSCrollPane >>> using the 1.4.2_01-b06 JDK and I created 50 lines of text and did >>> various keyboard based selections. Seemed pretty snappy to me... >>> >>> Tad Frysinger (TeamB) >> >> >> Thank You, >> >> I use JDK 1.4.1_02=b06 for Linux, JBuilder 9. Yes I use the teaxt area >> insiade the JScrollPane. No special tunning of the components was >> performed. All the properties have their default values. May be some >> setting should be made? >> >> Best regards, >> Alexei Akimov. >> > Is your 20-30 lines of text actually all one line that is wrapped? There > are known problems with performance on longer single lines (although > usually these are in the hundreds, or at least dozens of lines). > > Tad Frysinger (TeamB) Thank You, You are right again, it is a long wrapped line of text. You wrote it is know problem, would You please give me some links. Best regards, Alexei Akimov.
Re: JTextArea problem
Author: Tad Frysinger
Date: Wed, 11 Aug 2004 12:26
Date: Wed, 11 Aug 2004 12:26
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Alexei A. Akimov wrote: > Tad Frysinger ?????: > >> Alexei A. Akimov wrote: >> >>> Tad Frysinger ?????: >>> >>>> Alexei A. Akimov wrote: >>>> >>>>> Dear expert, >>>>> >>>>> I have a problem with JTextArea component. Suppose it is placed on >>>>> a JScrollPane and contains 20 or 30 lines of text. If I positin the >>>>> caret at the beginning of text and move it (using keyboard) down >>>>> holding the Shift button down then I make some selection in the >>>>> text. The problem is that the operation is very slow (program waits >>>>> while the selection is being repainted). If I seelct the same >>>>> fragment using mouse it is not slow. I use the default setting for >>>>> the JTextArea component except LineWrap property is set true. Any >>>>> ideas? >>>>> >>>>> Best regards, >>>>> Alexei Akimov >>>>> >>>> Which JDK are you using? I can create a JTextArea in a JSCrollPane >>>> using the 1.4.2_01-b06 JDK and I created 50 lines of text and did >>>> various keyboard based selections. Seemed pretty snappy to me... >>>> >>>> Tad Frysinger (TeamB) >>> >>> >>> >>> Thank You, >>> >>> I use JDK 1.4.1_02=b06 for Linux, JBuilder 9. Yes I use the teaxt >>> area insiade the JScrollPane. No special tunning of the components >>> was performed. All the properties have their default values. May be >>> some setting should be made? >>> >>> Best regards, >>> Alexei Akimov. >>> >> Is your 20-30 lines of text actually all one line that is wrapped? >> There are known problems with performance on longer single lines >> (although usually these are in the hundreds, or at least dozens of >> lines). >> >> Tad Frysinger (TeamB) > > Thank You, > > You are right again, it is a long wrapped line of text. You wrote it is > know problem, would You please give me some links. > > Best regards, > Alexei Akimov. > http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4202291 Tad Frysinger (TeamB)
Re: JTextArea problem
Author: Alexei A. Akimov
Date: Wed, 11 Aug 2004 18:30
Date: Wed, 11 Aug 2004 18:30
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Tad Frysinger ?????: > Alexei A. Akimov wrote: > >> Tad Frysinger ?????: >> >>> Alexei A. Akimov wrote: >>> >>>> Tad Frysinger ?????: >>>> >>>>> Alexei A. Akimov wrote: >>>>> >>>>>> Dear expert, >>>>>> >>>>>> I have a problem with JTextArea component. Suppose it is placed on >>>>>> a JScrollPane and contains 20 or 30 lines of text. If I positin >>>>>> the caret at the beginning of text and move it (using keyboard) >>>>>> down holding the Shift button down then I make some selection in >>>>>> the text. The problem is that the operation is very slow (program >>>>>> waits while the selection is being repainted). If I seelct the >>>>>> same fragment using mouse it is not slow. I use the default >>>>>> setting for the JTextArea component except LineWrap property is >>>>>> set true. Any ideas? >>>>>> >>>>>> Best regards, >>>>>> Alexei Akimov >>>>>> >>>>> Which JDK are you using? I can create a JTextArea in a JSCrollPane >>>>> using the 1.4.2_01-b06 JDK and I created 50 lines of text and did >>>>> various keyboard based selections. Seemed pretty snappy to me... >>>>> >>>>> Tad Frysinger (TeamB) >>>> >>>> >>>> >>>> >>>> Thank You, >>>> >>>> I use JDK 1.4.1_02=b06 for Linux, JBuilder 9. Yes I use the teaxt >>>> area insiade the JScrollPane. No special tunning of the components >>>> was performed. All the properties have their default values. May be >>>> some setting should be made? >>>> >>>> Best regards, >>>> Alexei Akimov. >>>> >>> Is your 20-30 lines of text actually all one line that is wrapped? >>> There are known problems with performance on longer single lines >>> (although usually these are in the hundreds, or at least dozens of >>> lines). >>> >>> Tad Frysinger (TeamB) >> >> >> Thank You, >> >> You are right again, it is a long wrapped line of text. You wrote it >> is know problem, would You please give me some links. >> >> Best regards, >> Alexei Akimov. >> > http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4202291 > > Tad Frysinger (TeamB) Thank You.
Re: JTextArea problem
Author: Daniel
Date: Sun, 15 Aug 2004 04:46
Date: Sun, 15 Aug 2004 04:46
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Hi, usually a very long paragraph will be really slow in Swing, regardless of the version of the jdk used. I mean, a 2 k paragraph will be really slow, while 1000 short paragraphs put in the same control will be very fast. There's nothing to be done: are you sure you really nead paragraphs THAT long? Regards, Daniel "Alexei A. Akimov" <a.a.akimov@mail.ru> wrote in message news:4119da83@newsgroups.borland.com... > Tad Frysinger ?????: > > Alexei A. Akimov wrote: > > > >> Tad Frysinger ?????: > >> > >>> Alexei A. Akimov wrote > >>> > >>>> Dear expert, > >>>> > >>>> I have a problem with JTextArea component. Suppose it is placed on a > >>>> JScrollPane and contains 20 or 30 lines of text. If I positin the > >>>> caret at the beginning of text and move it (using keyboard) down > >>>> holding the Shift button down then I make some selection in the > >>>> text. The problem is that the operation is very slow (program waits > >>>> while the selection is being repainted). If I seelct the same > >>>> fragment using mouse it is not slow. I use the default setting for > >>>> the JTextArea component except LineWrap property is set true. Any > >>>> ideas? > >>>> > >>>> Best regards, > >>>> Alexei Akimov > >>>> > >>> Which JDK are you using? I can create a JTextArea in a JSCrollPane > >>> using the 1.4.2_01-b06 JDK and I created 50 lines of text and did > >>> various keyboard based selections. Seemed pretty snappy to me... > >>> > >>> Tad Frysinger (TeamB) > >> > >> > >> Thank You, > >> > >> I use JDK 1.4.1_02=b06 for Linux, JBuilder 9. Yes I use the teaxt area > >> insiade the JScrollPane. No special tunning of the components was > >> performed. All the properties have their default values. May be some > >> setting should be made? > >> > >> Best regards, > >> Alexei Akimov. > >> > > Is your 20-30 lines of text actually all one line that is wrapped? There > > are known problems with performance on longer single lines (although > > usually these are in the hundreds, or at least dozens of lines). > > > > Tad Frysinger (TeamB) > Thank You, > > You are right again, it is a long wrapped line of text. You wrote it is > know problem, would You please give me some links. > > Best regards, > Alexei Akimov. >
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