web programming

Otto · Post by **Otto** » Sat Aug 03, 2019 9:19 pm

Dear Antonio,
where do we find information about "views" and structured programming applied
to HTML.
Are there rules how to format the source code.

Thank you in advance
Otto

Post by **Antonio Linares** » Sun Aug 04, 2019 7:47 am

Dear Otto,

This is the basic structure for a HTML page:

<html>
<head>
</head>
<body>
</body>
</html>

So our default.view using mod_harbour is going to be:

default.view

Code: Select all | Expand

{{View("head")}}
{{View("body")}}

As mod_harbour is able to build "nested" views, now we need to define head.view and body.view

head.view

Code: Select all | Expand

<html>
<head>
</head>

body.view

Code: Select all | Expand

<body>
</body>
</html>

From mod_harbour we do:
View( "default" )

And mod_harbour will put all the parts together. Now lets say we want to have a menu and a browse:
body.view

Code: Select all | Expand

<body>
{{View("menu")}}
{{View("browse")}}
</body>
</html>

Now we create a menu.view and a browse.view

This way all the complexity of a HTML page (lots of tags, very easy to make a mistake) is structured in small and easy to manage views

This is the beauty and the power of using mod_harbour Views engine :-)

shri_fwh · Post by **shri_fwh** » Tue Aug 06, 2019 9:20 am

Hi Antonio ,

I know little bit JSP how it works in the JSP we can AJAX to call URL and the web server execute the relevant code for the given URL.

How we can co-relate the functionality int he mod_harbour ? Could you please provide some examples ?

Thanks
Shridhar

Otto · Post by **Otto** » Tue Aug 06, 2019 11:07 am

Dear Antonio,
would you be so kind to post the source code corresponding to the description too.
I mean the folder containing the files.
Do we call this project?
Best regards
Otto

Otto · Post by **Otto** » Tue Aug 06, 2019 1:26 pm

Dear Antonio,
{{View("browse")}}
is this the same as
include('browse.view')
Best regards
Otto

Post by **Antonio Linares** » Sun Aug 11, 2019 5:47 am

Otto,

function View() is a very powerful engine to manage views "recursively". It is not the same as include.
This function will become part of mod_harbour soon... (once we decide if "/views/" should be a parameter also, and if "view" should be hardcoded or not...)

Code: Select all | Expand

function View( cName )

   local cData

   if File( hb_GetEnv( "PRGPATH" ) + "/views/" + cName + ".view" )
      cData = MemoRead( hb_GetEnv( "PRGPATH" ) + "/views/" + cName + ".view" )
      while ReplaceBlocks( @cData, "{{", "}}" )
      end
   else
      cData = "<h2>" + cName + " not found!</h2>" 
   endif    

return cData

Silvio.Falconi · Post by **Silvio.Falconi** » Fri Nov 08, 2019 8:33 am

Antonio,
could you please continue the lesson for us from this tread?

Otto · Post by **Otto** » Fri Aug 14, 2020 10:56 pm

Dear Antonio,
I see on TWeb that we can have
<%prg
return Harbour code
%>
in views.
Is this withour TView class possible.
Best regards
Otto

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