Suppose I have the following application which creates an editor for some
XML data:
<?xml version="1.0" encoding="UTF-8" ?>
<canvas height="100%" width="100%" bgcolor="#EEEEEE" debug="true">
<dataset name="data">
<items>
<item name="first">
<categories/>
</item>
</items>
</dataset>
<dataset name="categories">
<categories>
<category name="All"/>
<category name="Cat 1"/>
<category name="Cat 2"/>
</categories>
</dataset>
<simplelayout axis="y"/>
<view id="itemDisplay" datapath="data:/items/item">
<simplelayout axis="y" spacing="3"/>
<view name="nameEditor">
<simplelayout axis="x" spacing="3"/>
<text width="200">Name</text>
<edittext datapath="@name"/>
</view>
<view>
<simplelayout axis="x" spacing="3"/>
<text width="200">Categories</text>
<view id="checkboxes">
<simplelayout axis="y" spacing="2"/>
<view name="category"
datapath="categories:/categories/*">
<checkbox text="$path{'@name'}"
name="$path{'@name'}"/>
</view>
</view>
</view>
</view>
<button>Save...
<method event="onclick">
itemDisplay.datapath.updateData();
Debug.write("Data: " +
itemDisplay.datapath.dupePointer().serialize());
</method>
</button>
</canvas>
When run, this program will display an editext associated with the name
attribute for the <item> element in the 'data' dataset. It will also
display a series of checkboxes whose names come a second XML dataset. I
want the user to be able to select one or more checkboxes, and when the
Save button is hit, I want the XML associated with the 'data' dataset to
be updated to reflect the selected categories. As given above, suppose
the user entered 'first-edited' in the edittext box and selected three of
the checkboxes. Upon completion of the Save operation, I would want the
XML to look like this:
<items>
<item name="first - edited">
<categories>
<category name="All"/>
<category name="Cat 1"/>
<category name="Cat 2"/>
</categories>
</item
</items>
As written, I can get the newly edited name value, but I don't know how to
go about replacing the <categories> element of the original dataset with a
new one based on the selected values in the 'checkboxes' view. Using
LzDataElement, I can create a proper <categories> tag with appropriate
children, but I don't know how to update the 'data' dataset. Can someone
help me out on this?
Thanks!
--
James Howe
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