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how to embed a D/COM control in my U++ GUI ? [message #616]

Fri, 20 January 2006 20:07

razvan
Messages: 2
Registered: January 2006

Junior Member

Hi,

I'm trying to embed a COM control, (in my case the WebBrowser) in an application.
I saw the OLE/CTRL classes, but I can't figure out how to use them.
If you can give me a short example or some tips, it will be very helpful.

Thank you,
Razvan

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Re: how to embed a D/COM control in my U++ GUI ? [message #636 is a reply to message #616]

Mon, 23 January 2006 10:25

rylek
Messages: 79
Registered: November 2005

Member

Hello!

Unfortunately, this is not very simple. To be honest, the lack of an OLE container object is one of the big omissions in the current version of U++. Of course we would love to have one but, as we have always financed U++ development by our commercial projects, we haven't met the demand for it yet (on the other hand, it is already possible to develop ActiveX controls as such using the U++ library). As usual, all volunteers are welcome to help us on this, however I'm afraid that at least some cooperation from me or Mirek will be needed in any case as it is quite likely to have some fallout on the control core module and the window management system.

Regards

Tomas

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Re: how to embed a D/COM control in my U++ GUI ? [message #644 is a reply to message #636]

Mon, 23 January 2006 15:08

ucanca
Messages: 9
Registered: January 2006
Location: London, UK

Promising Member

Hi - I'm in the same situation as Razvan.

Specifically, regarding a webbrowser, how easy would it be to use HTMLayout (http://www.terrainformatica.com/htmlayout/)?

Apparently, it also can be used through the good ol' Win32 API but this means handling the Win32 messages and I don't know how to this either... Could someone provide me with some pointers, please?

Thanks!

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Re: how to embed a D/COM control in my U++ GUI ? [message #653 is a reply to message #644]

Mon, 23 January 2006 22:04

ucanca
Messages: 9
Registered: January 2006
Location: London, UK

Promising Member

Hi - again.
Back from work and I had a look at U++'s internals.

Am I right in saying that to answer my own question above (how to handle Win32 messages), I need to:

1. Derive MyControl from Ctrl

2. Add the following code to MyControl.ccp
LRESULT MyControl::WindowProc(UINT message, WPARAM wParam, LPARAM lParam)
{
HWND hWnd = GetHWND();
switch(message) {
case WM_MessageIWantToHandle:
MyHandler(hWnd);
return 0;
}

return Ctrl::WindowProc(message, wParam, lParam);
}

void MyControl::MyHandler(HWND hWnd) { ... }

Is that all it takes or have I missed some key step?

Thanks!

[Updated on: Mon, 23 January 2006 22:12]

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Re: how to embed a D/COM control in my U++ GUI ? [message #657 is a reply to message #653]

Mon, 23 January 2006 23:25

mirek
Messages: 14271
Registered: November 2005

Ultimate Member

Correct.

There is however one thing you should know: Normal "child" Ctrls do not have associated HWND (just top-level Ctrls have one).

However, there is special Ctrl derived "DHCtrl" class that is basicaly child Ctrl with HWND.

Mirek

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Re: how to embed a D/COM control in my U++ GUI ? [message #659 is a reply to message #657]

Tue, 24 January 2006 00:34

ucanca
Messages: 9
Registered: January 2006
Location: London, UK

Promising Member

That's the bit I couldn't work out! Many thanks, luzr.

I'm still pretty new to U++ but I'm absolutely amazed by what you guys have achieved - this framework deserves to be far more widely known!!

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Re: how to embed a D/COM control in my U++ GUI ? [message #904 is a reply to message #644]

Tue, 07 February 2006 17:15

hojtsy
Messages: 241
Registered: January 2006
Location: Budapest, Hungary

Experienced Member

ucanca wrote on Mon, 23 January 2006 09:08

Specifically, regarding a webbrowser, how easy would it be to use HTMLayout (http://www.terrainformatica.com/htmlayout/)?

Apparently, it also can be used through the good ol' Win32 API but this means handling the Win32 messages and I don't know how to this either... Could someone provide me with some pointers, please?

The license of HTMLayout is more restrictive than of U++. If you release non-free apps with HTMLayout, you have to pay $350. Seems like a big obstacle for me...

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Re: how to embed a D/COM control in my U++ GUI ? [message #905 is a reply to message #904]

Tue, 07 February 2006 20:13

mirek
Messages: 14271
Registered: November 2005

Ultimate Member

BTW, depends what you consider "HTML viewer". "Basic" HTML, without JavaScript, DHTML etc.. should not be that hard to implement - most likely as HTML -> RichText convertor.

Mirek

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Re: how to embed a D/COM control in my U++ GUI ? [message #925 is a reply to message #905]

Thu, 09 February 2006 12:31

hojtsy
Messages: 241
Registered: January 2006
Location: Budapest, Hungary

Experienced Member

As an exercise I created the most simple HTML->Qtf converter. Currently it can only handle <b><i><u><s> and <br>. Feel free to improve and extend.
You can also use the example app to experience with the Qtf format in real-time.

Attachment: HtmlDemo.zip
(Size: 1.75KB, Downloaded 1735 times)

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Re: how to embed a D/COM control in my U++ GUI ? [message #958 is a reply to message #925]

Fri, 10 February 2006 01:27

ucanca
Messages: 9
Registered: January 2006
Location: London, UK

Promising Member

Thanks, hojtsy - I'll have a go this weekend!

Re: Htmlayout's license, you're right, it is not really an option for a commercial application. FYI and for rendering only, QHTM (http://www.gipsysoft.com/qhtm/) looks like a much cheaper alternative. (it is actually the solution I had gone for...)

Ideally, embedding IE or the ActiveX version of the Mozilla browser would be a far better solution (apologies to the non-Windows developers Wink

) but this would require U++ to support COM/ActiveX objects... (definitely above my current U++ skills for the time being Sad

)

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Re: how to embed a D/COM control in my U++ GUI ? [message #1585 is a reply to message #905]

Thu, 09 March 2006 07:17

c-smile
Messages: 1
Registered: March 2006
Location: Canada

Junior Member

luzr wrote on Tue, 07 February 2006 11:13

BTW, depends what you consider "HTML viewer". "Basic" HTML, without JavaScript, DHTML etc.. should not be that hard to implement - most likely as HTML -> RichText convertor.
Mirek

Propbably this would be interesting somehow:

http://www.terrainformatica.com/wiki/pmwiki.php/Harmonia
It is a GUI library for D programming language / digitalmars.com. It is functional analog of U++ as far as I can see, but in D.

Harmonia has simple HTML alike engine used for Declarative UI purposes - layout of dialogs, forms, help, etc.

So probably it makes sense to port it in U++.

And regarding HTMLayout and for information: I also have windowless version which can be integrated better in U++.

Andrew.

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