Article View: borland.public.jbuilder.java.swing
Article #7812Re: What is wrong with this code: Combo box displays incorrectly?
From: Reid
Date: Mon, 01 Jan 2001 05:40
Date: Mon, 01 Jan 2001 05:40
178 lines
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6786 bytes
I just D/L'd the new Java-Plugin v1.3.0.1 (j2re-1_3_0_01-win.exe)
The new version of the plug-in enhances debugging greatly. It provides
a visual error dialog with the error description. It also allows
greater interaction with the debugging console.
As a result of this fruitful upgrade when the applet I am having
problems with is launched outside the JBuilder IDE in an external
browser, it now displays an error dialog with the following error:
The dialog is entitled : "Java Plugin Exception Dialog"
with an error message of ....
"java.lang.NoClassDefFoundError: com/borland/jbcl/layout/VerticalFlowLayout"
I did try changing the layout type for every component in the project to
NULL. When I load the applet in Netscape's browser externally it does
not display the error. The combobox's drop down also displays in the
correct position!!!
Being new to Java I do not know how to resolve this.
I am using the JBuilder Enterprise version. Can someone please offer me
some insight?
Any help would be greatly appreciated.
Thanks
Reid Roman
Rich Wilkman wrote:
> Reid:
>
> Beginners should not start with Applets... What components, what
> browser (which version of the browser), etc.
>
> -Rich
>
> Reid wrote:
>
>> 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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