WML Tasks
A task specifies what action to perform when an event, like entering a card or selecting
a link, occurs.
Go Task
The <go> task represents the action of switching to a new card.
<?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN"
"http://www.wapforum.org/DTD/wml_1.1.xml">
<wml>
<card>
<p>
<anchor>
Go To Test
<go href="test.wml"/>
</anchor>
</p>
</card>
</wml>
|
Prev Task
The <prev> task represents the action of going back to the previous
card.
<?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN"
"http://www.wapforum.org/DTD/wml_1.1.xml">
<wml>
<card>
<p>
<anchor>
Previous Page
<prev/>
</anchor>
</p>
</card>
</wml>
|
Refresh Task
The <refresh> task refreshes some specified card variables. If any of
the variables are shown on the screen, this task also refreshes the screen.
|
The example below uses an <anchor> tag to add a "Refresh
this page" link to the card. When the user clicks on the link, he or
she refreshes the page and the value of the variable x will be set to 30:
<?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN"
"http://www.wapforum.org/DTD/wml_1.1.xml">
<wml>
<card>
<p>
<anchor>
Refresh this page
<go href="thispage.wml"/>
<refresh>
<setvar name="x" value="30"/>
</refresh>
</anchor>
</p>
</card>
</wml>
|
Noop Task
The <noop> task says that nothing should be done (noop stands for
"no operation"). This tag is used to override deck-level elements.
The <do> tag can be used to activate a task when the user clicks on a
word/phrase on the screen.
|
The example below uses a <do> tag to add a "Back" link
to the card. When the user clicks on the "Back" link, he or she
should be taken back to the previous card. But the <noop> tag
prevents this operation; when the user clicks on the "Back" link
nothing will happen:
<?xml version="1.0"?>
<!DOCTYPE wml PUBLIC "-//WAPFORUM//DTD WML 1.1//EN"
"http://www.wapforum.org/DTD/wml_1.1.xml">
<wml>
<card>
<p>
<do name="back" type="prev" label="Back">
<noop/>
</do>
</p>
</card>
</wml>
|
Task Elements
| Start tag |
Purpose |
WML |
| <go> |
Represents the action of switching to a new card
|
1.1 |
| <noop> |
Says that nothing should be done (noop stands for
"no operation"). Used to override deck-level elements
|
1.1 |
| <prev> |
Represents the action of going back to the previous card
|
1.1 |
| <refresh> |
Refreshes some specified card variables. If any of
the variables are shown on the screen, this task also refreshes the screen |
1.1 |
| 
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