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Article View: borland.public.jbuilder.java.swing
Article #7804

Re: What is wrong with this code: Combo box displays incorrectly?

#7804
From: Reid
Date: Sun, 31 Dec 2000 03:49
137 lines
5179 bytes
Well I tried creating the applet using just AWT components and the 
result was the same.

Being new to Java something so simple as dropping down a combobox's 
items should go without a hitch.

It is making a beginner in this language move ahead with little faith..

If these types of things happen with something that should be so basic 
(and nobody can answer the issue) I hate to see what happens when the 
code gets complicated... ;)

Reid

Reid wrote:

> Thanks Rich for the response.
> 
> Hmmm...
> 
> I have not done much work on this applet yet so I will try to recreate 
> it without the mix.
> 
> I will post my results to the thread A.S.A.P.
> 
> Thanks again for responding..
> 
> There is not much interaction in these forums ...
> 
> 
> Reid
> 
> Rich Wilkman wrote:
> 
>> Reid:
>> 
>> The offset is probably caused by using heavyweight and lightweight
>> components together.  You don't post the containers (i.e., Applet of
>> JApplet, JComboBox, etc.).  There's a really good article on this at the
>> Sun site.  Used to be referenced in the hints_and_tips docs with
>> JBuilder back when Swing was new and folks porting over to it kept
>> running into problems.
>> 
>> -Rich
>> 
>> Reid wrote:
>> 
>>> Hello James,
>>> 
>>> Thank you for responding to my post.
>>> 
>>> You have solved half of the problem!
>>> 
>>> The trailing semi colon was the reason the combo box was not being
>>> filled with it's values.
>>> 
>>> I still have a problem in that when the drop down list containing the
>>> combo box's items are displayed, the list does not display in the
>>> correct position.  The list displays in an offsetted way to the right
>>> and down approx 100-200 pixels.  This is not the effect I am looking
>>> for.  I of course want the list to drop down underneath the control and
>>> remain the same size in width.
>>> 
>>> If the applet is launched as a viewer (via F9) the drop down list
>>> remains directly under the control but extends out to the left and 
>>> right
>>> of the applet's canvas and as a result it's width gets truncated.
>>> 
>>> I am coming primarily from a Delphi background and have never seen this
>>> type of behavior. (unless of course you are using the TCombobox as an
>>> OwnerDraw type and are drawing the control's canvas incorrectly)
>>> 
>>> Do you think it is related to the format of the underlying layout 
>>> manager?
>>> 
>>> Any more help would be greatly appreciated!
>>> 
>>> Thanks
>>> 
>>> Reid
>>> 
>>> James A. Schulz wrote:
>>> 
>>>> Just a guess, but do you really want the semicolon after "...index++)"
>>>> 
>>>> James
>>>> 
>>>> "Reid" <reidr@buzybee.com> wrote in message
>>>> news:3A4BAE85.6010902@buzybee.com...
>>>> 
>>>>> Hello,
>>>>> 
>>>>> I am new to applets and am having a bit of a problem.
>>>>> 
>>>>> I have the following code to populate a combo box box with strings..
>>>>> 
>>>>> String [] appnames = { "Corel Clipart Locator", "Data Doctor", "Event
>>>>> Organizer", "HTML Developer Database",  "Image Thumbnail Viewer",
>>>>> "iTaxSystem", "Odyssey Warranty Tracker", "SFS Database" };
>>>>> 
>>>>>  private void jbInit() throws Exception {
>>>>>  ...
>>>>>   fillAppNames();
>>>>>  }
>>>>> 
>>>>> 
>>>>> public void fillAppNames() {
>>>>>  int index;
>>>>>  for (index = 0; index<appnames.length; index++);
>>>>>   {
>>>>>    cbAppNames.addItem(appnames[index]);
>>>>> 
>>>>>   }
>>>>> 
>>>>>  }
>>>>> 
>>>>> The code above compiles but when run it appears to fill the combo box
>>>>> with empty strings.
>>>>> 
>>>>> When the box drops down it appears to have some volume but not the 
>>>>> array
>>>>> contents.  It also shows the drop down an inch or two down and to the
>>>>> right of the actual combo box control?
>>>>> 
>>>>> Can someone tell me what I am doing wrong?
>>>>> 
>>>>> 
>>>>> Any help would be greatly appreciated!
>>>>> 
>>>>> Thanks
>>>>> 
>>>>> 
>>>>> Reid Roman
>>>>> BuzyBee Software
>>>>> http://www.buzybee.com
>>>>> 
> 
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Date: Sat, 30 Dec 2000 19:49:07 -0800
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Subject: Re: What is wrong with this code:  Combo box displays incorrectly?
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