1Webapp.autoFill(3kaya)       Kaya module reference      Webapp.autoFill(3kaya)
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NAME

6       Webapp::autoFill - Automatically fill a HTML form
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SYNOPSIS

9       Void  autoFill(  ElementTree  form,  DataSource  mainvars, Dict<String,
10       [String]>  extravars=Dict::new() )
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ARGUMENTS

13       form The form element (or a subset of that if you only wish to automat‐
14       ically fill a part of the form.
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16       mainvars The data source to use (e.g.  DataPost )
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18       extravars  An  optional  dictionary mapping keys to lists of values, to
19       allow a form to be automatically filled from a database. You may or may
20       not need to use DataNone as your main data source in this case.
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DESCRIPTION

23       Automatically  fill  a  HTML  form based on data from a particular data
24       source. This makes it easy to construct web forms with error handling -
25       see  the  webapp tutorial ⟨http://kayalang.org/tutorial/web/webapp⟩ for
26       more information.
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29    ElementTree OnHello(Int dummy) {
30        div = anonymousBlock; // we create this temporarily.
31        fname = incomingValue("fname",DataPost);
32        lname = incomingValue("lname",DataPost);
33        if (fname != "" && lname != "") {
34            p = addParagraph(div,"Hello "+fname+" "+lname);
35            return p;
36        } else {
37            form = HelloForm();
38    // if they entered one of first and last name, make sure it's still in the
39   form
40            autoFill(form,DataPost);
41            return form;
42        }
43    }
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45    ElementTree helloForm() {
46        parent = anonymousBlock;
47        form = addLocalForm(parent);
48        f1 = addFieldset(form,"Who are you?");
49        input = addLabelledInput(f1,"Your First Name",InputText,"fname","",0);
50        input = addLabelledInput(f1,"Your Last Name",InputText,"lname","",0);
51        submit = addLocalControlInput(f1,"Say hello",OnHello,1);
52        return form;
53    }
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AUTHORS

56       Kaya   standard  library  by  Edwin  Brady,  Chris  Morris  and  others
57       (kaya@kayalang.org). For further information see http://kayalang.org/
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LICENSE

60       The Kaya standard library is free software;  you  can  redistribute  it
61       and/or  modify  it  under  the  terms  of the GNU Lesser General Public
62       License (version 2.1 or any later version) as  published  by  the  Free
63       Software Foundation.
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66       WebCommon.DataSource (3kaya)
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70Kaya                             December 2010          Webapp.autoFill(3kaya)
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