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Where to add event function in theide [message #21449]

Thu, 21 May 2009 09:41

samsam598
Messages: 4
Registered: May 2009

Junior Member

Sorry for the silly question since I can't find the answer after tried quite a while:

I was wondering where to add event function to a widget,say a button in theide when using the from designer?

Thanks for your help.
Regards,
Sam

[Updated on: Thu, 21 May 2009 09:46]

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Re: Where to add event function in theide [message #21459 is a reply to message #21449]

Thu, 21 May 2009 16:40

mirek
Messages: 14255
Registered: November 2005

Ultimate Member

Layout designer creates only the layout, it knows nothing about the final class.

There is a helper for adding THISBACKs (which is I guess rough equivalent to 'even function') in theide - just press Alt+T. Anyway, I am a little bit afraid not many use it now (I do not), maybe it would need some refinement, maybe adding handlers normally (with Assist and Alt+C) is good enough...

Mirek

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Re: Where to add event function in theide [message #21473 is a reply to message #21459]

Fri, 22 May 2009 03:22

samsam598
Messages: 4
Registered: May 2009

Junior Member

Thanks so much for your help.I mean,for example,when one clicks a button named btnOK,something happens:

void btnOK_Click()
{
PromptOK("Button btnOK is clicked.");
}

In the ide,when I create a form with a button,I can not find out where to add the above code.

ALT+T or Assist(ALT+C) all tried but it does not help.

Regards,
Sam

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Re: Where to add event function in theide [message #21478 is a reply to message #21473]

Fri, 22 May 2009 10:26

mirek
Messages: 14255
Registered: November 2005

Ultimate Member

samsam598 wrote on Thu, 21 May 2009 21:22

I see.

First of all, do you already have dialog class?

http://www.ultimatepp.org/reference$Layout.html

(beware, above example shows how to create your dialog class, not your case).

Anyway, as long as you have such class, simply put

myOKbutton = callback(btnOK_Click);

into constructor.

Note that in 99.99% cases, you will rather want to call a method of dialog, not global level function. That is what Alt+T is designed for. Also, as soon as you type THISBACK(, Assist++ will offer a list of methods...

Another relevant example:

http://www.ultimatepp.org/examples$Button.html

Just in this case, no layout is used. Anyway, using designed layout has very similar effect to adding "button" member variable and "Add(button.VCenterPos(20).HCenterPos(200));"...

Mirek

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Re: Where to add event function in theide [message #21485 is a reply to message #21478]

Fri, 22 May 2009 14:54

samsam598
Messages: 4
Registered: May 2009

Junior Member

Sorry,sorry,so sorry to keep asking...

In both case you've described,I fully understood the poit.My problem is that in the designer I create a button ,and I gave it a name (in column "variable/id?") *btnOK*.Then I change to head file and cpp file where there is no such a variable named btnOK inside the entire file,no only any classes,so how can I call

btnOK=callback(btnOKClick);//where is variable *btnOK*?

This is the problem I met.
Thanks a million.

Regards,
Sam

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Re: Where to add event function in theide [message #21486 is a reply to message #21485]

Fri, 22 May 2009 15:29

cbpporter
Messages: 1427
Registered: September 2007

Ultimate Contributor

By using the Layout editor you create just a template, a recipe if you will, for creating a window or a widget that will have that layout and those fields. It is a definition, speaking in C terms. You need a declaration.

Let�s say you named your template TestLayout. Now you can create a concrete layout by appending "With" to the name of the template:

class testWindows: WithTestLayout<TopWindow>

Now you have a class with that layout and it will contain your "btnOK". Yet you can search in the code and you won�t find that explicit declaration anywhere.

In one of your methods from the class, usually the constructor, you can say:

btnOK=callback(btnOKClick);

Or if you want to use a less OOP approach, you can do:

WithTestLayout<StaticRect> b;
b.btnOk=callback...

Notice this time I used StaticRect. You can apply the layout to anything you want, including Buttons, EditFields and every existing widget, including your own if you have written any custom widgets.

PS: Don't forget to call CtrlLayout. Without it you layout will appear null.
I hope you�ll have more success with layouts in the future. Very powerful once you get used to them.

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Re: Where to add event function in theide [message #21487 is a reply to message #21486]

Fri, 22 May 2009 15:54

samsam598
Messages: 4
Registered: May 2009

Junior Member

Ah~

Got it and will experence later.Thanks so much for your prompt response!

Btw,may I ask is the GUI native feel and look to the platform like wxWidgtes or just self-drawing like the one Qt does?Furthermore,for a begenner of U++,where should I start,the tutorial or the examples or something else?

Thanks.

Regards,
Sam

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Re: Where to add event function in theide [message #21488 is a reply to message #21449]

Fri, 22 May 2009 16:10

mr_ped
Messages: 826
Registered: November 2005
Location: Czech Republic - Praha

Experienced Contributor

While editing layout file, you can press Ctrl+T to see the actual C++ definition of edited layout.
(although it consist of powerful macros, so it may be somewhat confusing to decode it)

Also you can use preprocess (Alt+F7) on the file where the layout is included and used to see final generated C++ code and get better idea how the layout editor works in U++.

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Re: Where to add event function in theide [message #21491 is a reply to message #21487]

Fri, 22 May 2009 18:34

mirek
Messages: 14255
Registered: November 2005

Ultimate Member

samsam598 wrote on Fri, 22 May 2009 09:54

Ah~

Got it and will experence later.Thanks so much for your prompt response!

Btw,may I ask is the GUI native feel and look to the platform like wxWidgtes or just self-drawing like the one Qt does?

It is self-drawing. It has flexible skin system and on start, it skins itself to look and feel native (at least as close as possible).

Quote:

Furthermore,for a begenner of U++,where should I start,the tutorial or the examples or something else?

I think you should first go through

Getting Started With Ultimate++

of

http://www.ultimatepp.org/www$uppweb$documentation$en-us.htm l

then play with examples and reference examples.

(the difference is that "examples" example tries to demoU++ in relatively complex apps, while "reference" example focuses on single aspect)

Mirek

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