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The Minibrowser allows the usage of variables. The var callback returns the corresponding value for the given variable.
There are two ways to initialize a variable:
- By adding it to the URL when calling the Minibrowser page. Example: http://link_to_the_minibrowser_code.xml#var:myvar=somevalue
By checking if the variable is empty and, if yes, refresh the page via mb_nop with the variable as parameter:
<If condition="$(empty:$(var:myvar))"> <fetch mil="1">phone://mb_nop#var:myvar=somevalue</fetch> </If>
Example 1: simple variable initialization
<?xml version="1.0" encoding="UTF-8"?>
<SnomIPPhoneText id="text">
<If condition="$(empty:$(var:myvar))">
<fetch mil="1">phone://mb_nop#var:myvar=somevalue</fetch>
</If>
<Text>Variable is $(var:myvar)</Text>
</SnomIPPhoneText>
Result when the variable value was added to the Minibrowser URL (URL called: http://10.110.16.61/xml/minibrowser/tests.xml#var:myvar=whatever)
Result when the variable value was not added to the Minibrowser URL (URL called: http://10.110.16.61/xml/minibrowser/tests.xml)
Example 2: Show the variable first_page before and after a value is assigned to it. The value of the callback will only last until the minibrowser is closed.
<?xml version="1.0" encoding="UTF-8"?>
<SnomIPPhoneBatch>
<SnomIPPhoneText id="page0">
<Title>page 0</Title>
<SoftKeyItem>
<Name>*</Name>
<Url>http://link_to_this_example.xml#sub=*[@id="page1"]</Url>
</SoftKeyItem>
<Text>
var:first_page: $(var:first_page)
<br />
Press * to continue
</Text>
</SnomIPPhoneText>
<SnomIPPhoneText id="page1">
<Title>page 1</Title>
<SoftKeyItem>
<Name>*</Name>
<Url>http://link_to_this_example.xml#sub=*[@id="page2"]&var:first_page=$(urlencode:hello world)</Url>
</SoftKeyItem>
<Text>
Pressing * will set variable 'var_first_page' to value 'hello_world'
<br />
Press * to continue
</Text>
</SnomIPPhoneText>
<SnomIPPhoneText id="page2">
<Title>page 2</Title>
<SoftKeyItem>
<Name>*</Name>
<Url>http://link_to_this_example.xml#sub=*[@id="page0"]</Url>
</SoftKeyItem>
<Text>
var:first_page: $(var:first_page) <br />
Press * to continue to Page0
</Text>
</SnomIPPhoneText>
</SnomIPPhoneBatch>
Result:
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