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List:       kde-devel
Subject:    Re: Easy to use components
From:       weis () stud ! uni-frankfurt ! de
Date:       1999-07-02 12:57:43
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Hi,

Just a remark: Linking libraries is not always a solution.
Libraries can produce name clashes or can apply for limited
resources like the alaram timer, use another library in a
differnet version etc. etc.

That is the reason why KOM components run in separate processes.

What does MS do? does the IE run in its own process, too, or
is it just a DLL with some ActiveX wrapper ?

Bye
Torben


On Fri, 2 Jul 1999, Simon Hausmann wrote:

> On Fri, 2 Jul 1999, Lars Knoll wrote:
> 
> > On Thu, 01 Jul 1999, Kurt Granroth wrote:
> > >I used an ActiveX component for the first time yesterday (<excuse>I had to
> > >get the product working in under and hour and it had to be a Windows app (in
> > >the project-requirements)</excuse>).  I almost hate to say it, but I was
> > >impressed!
> > >
> > >What I needed to do was embedd a web browser into my app.  Mind you, an HTML
> > >widget would *not* have worked as the browser needed to take care of such
> > >things as the proxy and downloading the pages as well as displaying them.
> > >I used the MS Internet Explorer ActiveX component to do this.  Here are
> > >all the steps I took to do so in VC++5:
> > >
> > >1) Click on Project->Add Components.  Select WebBrowser control from HUGE list
> > >   of components (all with descriptions).  Decide on name for the wrapper
> > >   class (CWebBrowser)
> > >
> > >2) Go to the dialog editor (my app was dialog based).  I see a cute icon on my
> > >   tools bar for the browser component.  I select it and do a click-n-drag
> > >   to put it on my dialog in the size that I want.
> > >
> > >3) I go to the class-wizard and associate a member variable for that component
> > >   (CWebBrowser m_browser)
> > >
> > >Mind you, I have not written one *single* line of code, yet.
> > >
> > >4) I go into my dialog class (CGpsDemoDlg) and add this to the init function
> > >   m_browser.Navigate("http://www.pobox.com/~kurt_granroth", ..).
> > >
> > >5) I compile and run.  Voila!  I see my home page displayed in my app.
> > >
> > >Wow!  One line of code to have an entire embedded web browser!  Of course,
> > >there are tons more options that you can set (and I did, later), but the fact
> > >that you can do sooo much with so little effort is incredible.
> > >
> > >Just some food for thought when we think about using KOM/OP.  Can we get it to
> > >be that easy?
> > 
> > I think, we can get it almost that easy even without using KOM/OP. I once had a
> > thought about implementing a browser class in khtml, which does almost
> > everything for the user. But for that khtml will need to link against libkio.
> > Then one could perhaps do something like:
> > 
> > 	KHTMLBrowser m_browser;
> > 	m_browser.load(my_url);
> > 	m_browser.show();
> > 
> > to get a HTML window in you app. The question is then, howmuch should it do by
> > itself? Should it follow links if a user clicks onto it, etc...
> > 
> > Another possibility is to use konqueror for showing your page, but you probably
> > wanted to embed it into some widget...
> 
> I think Torben's KBrowser class in Konqueror is what you're looking for.
> 
> But: Why not use the full-fledged HTMLView component from Konqueror
> directly? IMHO this is what components are for, and embedding a
> remote KonqHTMLView can be done in about 10 LOC.
> 
> Advantages are:
> - Use all features from Konqy, including Plugins (see tool-issue thread on
>   kfm-devel)
> - KonqHTMLView has nice features, just like "save document as..." for
>   example . Either call the method directly or use the GUI (next point)
> - Just send the HTMLView a special event with a reference to a
>   OpenPartsUI::Menu and it fills it with it's menu entries.
> 
> I think this is the 100% equivalent thing to the ActiveX component
> or IE.
> 
> Bye,
>  Simon
> 
> 

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