Re: [Tm4j-tmnav-dev] running tmnav on applet

[Rinalldo Y. <ry...@cs...>]

Hi Christoph, thank you for your reply

Its just returning the TMNavMainFrame which is inside the TMNav.

a simple method...

in TMNav.java:

public TMNavMainFrame getFrame(){
   return frame;
}

thanks heaps in advance

On Sun, 17 Oct 2004, Christoph Froehlich wrote:

> Hi Rinalldo
>
> could you send me your implementation of TMnav.getFrame()?
> Thanks
> c
>
>
> Am So, den 17.10.2004 schrieb Rinalldo Yasahardja um 11:40:
>> Hi Christoph, thank you for your reply
>>
>> This is also the first time for me to convert a stand alone application
>> into applet, so I am still working out the solution.
>>
>> In my previous experience in using applet, basically all you have to do is
>> have a frame or anything that you want to display gets constructed
>> properly in the applet class. Then make the applet class "show" that
>> frame. Since tmNav has a frame called TMNavMainFrame in which every panels
>> and menus are included (based on my understanding of the source code), I
>> assume all I have to do is create a TMNavMainFrame class variable in the
>> applet class and constructs it exactly like the TMNavMainFrame is
>> constructed in the tmNav.
>>
>> I assumed that all I had to do was to set the TMNavMainFrame in TMNav not
>> to show anything and show TMNavMainFrame which is inside the applet
>> class instead, however I kept getting NullPointerException.
>>
>> Even after I put additional method in TMNav class called getFrame() which
>> returns TMNavMainFrame inside TMNav class, it still wouldnt work. So I
>> have the following:
>>
>> class myApplet extends Applet{
>>    TMNavMainFrame test = null;
>>    TMNav application = null; // must have this
>>
>>    //init must be overridden
>>    void init(){
>>      //basically contains what is inside of the main function in TMNav
>>      //most important are:
>>      // application.getInstance().makeInstance();
>>
>>      // application.getInstance().show();
>>      // if the show function is called, then TMNav runs on separate window
>>      // since i want the frame to be displayed in the applet, it was turned
>>      // off
>>
>>      test = application.getInstance().getFrame();
>>      test.show();
>>    }
>> }
>>
>> with this way, the getFrame() method is somehow returning null and hence I
>> got the NullPointerException (it is supposed to return TMNavMainFrame
>> inside TMNav) and since I called it after everything was constructed
>> properly (that is, after the show() function is normally called in the
>> main function), that I have no idea why it is returning null.
>>
>> any comments ?
>>
>> On Sun, 17 Oct 2004, Christoph Froehlich wrote:
>>
>>> Hi Rinalldo,
>>>
>>> I've never developed an applet  so I'm just guessing, but I think that
>>> you are on the right track. TMNav creates on startup a JFrame that is
>>> used as its base container.
>>>
>>> I just had a look at the code and I think it shouldn't be too difficult
>>> to make TMnav use a given java.awt.Container to use at its base
>>> container. If it turns out to be fruitful, I would do a refactoring, to
>>> enable the use of TMNav as an applet.
>>>
>>> Nevertheless, some questions come to my mind:
>>>
>>> When developing an applet, are you creating the basic container by your
>>> own, or is it provided by the enviroment (browser, appletviewer)?
>>>
>>> What is about Menubars in applets. Are they supported?
>>>
>>> TMnav sometimes opens new frames for some features. (TologQuery, several
>>> dialogs). How do you deal with the concepts of opening dialogs in
>>> applets. I think you are not allowed to open a window from an applet, or
>>> are you?
>>>
>>>
>>> Hmm. I'm not really decided, whether it is possible to refactor TMNav
>>> without extravagant expenses. What do you think?
>>>
>>> bye
>>> c
>>>
>>>
>>> PS: If your sole target is to get xtm displayed as a graph in an applet,
>>> you may have a look a Jens Kaschniks Hypergraph-Project (for kings &
>>> queens: http://hypergraph.sourceforge.net/examples_tm_kaq.html)
>>>
>>>
>>>
>>> Am So, den 17.10.2004 schrieb Rinalldo Yasahardja um 9:20:
>>>> Hi, I am planning to make tmnav running on applet so I can share work on
>>>> the server, that is, so my teammates can directly look at xtm files on the
>>>> server using tmnav. The catch is, now tmnav runs on separate window. So
>>>> when I viewed the applet using apppletviewer, the applet window said
>>>> "Applet loaded" but tmnav is on its own window (which makes sense since it
>>>> was a stand alone application anyway). Hence there are 2 windows opened.
>>>>
>>>> However, when i tested it with html page, the applet did not show anything
>>>> on the webpage. Is it possible because of the fact that tmnav runs on its
>>>> own window and NOT on the applet window ?
>>>>
>>>> anyone know how to fix this ?
>>>>
>>>> thanks heaps in advance
>>>>
>>>>
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>>> --
>>> Christoph Froehlich <cf...@fo...>
>>>
>>
>>
>> -------------------------------------------------------
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> -- 
> Christoph Froehlich <cf...@fo...>
>