- Texts in Forms?

From: [at]} <Wojtek>
Date: Fri, 22 Apr 2005 09:24:38 -0400 (EDT)

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Rene:

  I faced a similar problem when I wrote Gr. In my case I wanted
to display my own view in a form (a graphical display of histograms)
and I wanted the user to interact with that view. I grappled with
the design for quite a while. Folks at OuS helped me to find
a solution (many thanks to Wolfgang and Cuno). Please have a look
at Gr demo program GrDAQDemo. In particular, try a panel named
DAQ Panel Demo (execute GrDAQDemo-New DAQ panel). When you open
that panel, you will see an empty plotter in the middle. There is
a button Start DAQ. Once you press that button, the program
starts talking to the plotter. Press the button Acquire and you will
see the data displayed there.

Also try the menu item GrPlotter->New Empty Plotter. This will
open a free-floating empty plotter. The program is not talking to it.
Now execute GrDAQDemo->Connect DAQ to plotter. From this point
the DAQ demo program is talking to this plotter. (It gets disconected
from the previous one). Press the Acquire button and you will see
the spectrum growing in the new plotter.

Also, try "Read histo from disk demo". It will show you the same
technique. It will also show how to open and read an ASCII file from
disk, and display its content in the view embedded in a Form.

These demos work with a single view in a form. I also have programs
with several GrViews embedded in the same form. There is a way
to find each one. This could be a starting point for a Chat form
in which you have two text windows, an incoming and outgoing chat.

In a nutshell, the "connect" procedures show you how you can find
a view that is somewhere in the display space. You first create
a form with an empty view (a GrView in my case), save to disk, and
then later open it and connect to this view.

My examples work with GrViews where I have written some methods
to make this easier for myself. Study those methods and you will see
which BlackBox calls I am using. These calls wee suggested to me
by Cuno and Wolfgang.

Hope this will get your feet wet. Cheers,

W.


On Fri, 22 Apr 2005 rene.krywult{([at]})nowhere.xy

> I want to use the COMM Subsystem for a chat-program.
>
> The communication-part is quite easy, but there's one thing
> that poses a challenge to me:
>
> I want the users to enter their texts in a text field, and
> when they press enter, the text is sent to the recipient
> (so far so easy). I don't want the server to open a new
> TextView in a new window, but to have that textview in a
> form.
>
> So, my form consists of a textfield, a "Send"-Button,
> a "Close"-Button and a textview.
>
> How do I implement the textview in the form?
>
> I can copy a textview into a form, but I see no way to link
> it to my TextModels.Model variable. And "Properties" always
> shows the Font properties, instead of the TextView-
> Properties.
>
> Any ideas?
>
> Rene

--- BlackBox
--- send subject HELP or UNSUBSCRIBE to blackbox{([at]})nowhere.xy



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Received on Fri Apr 22 2005 - 15:24:38 UTC