MACROMEDIA COLDFUSION 5-DEVELOPING, Руководство по разработке

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150 Chapter 9 Building Dynamic Forms
Structuring Tree Controls
Tree controls built with
cftree
can be very complex. Knowing how to specify the
relationship between multiple cftreeitem entries will help you handle even the
most complex of
cftree
constructs.
Example: one-level tree control
This example consists of a single root and a number of individual items:
<cfquery name="deptquery" datasource="CompanyInfo">
SELECT Dept_ID, Fir ’ ’ + LastName
AS FullName
FROM Employee
ORDER BY Dept_ID
</cfquery>
<cfform name="form1" action="submit.cfm">
<cftree name="tree1">
<cftreeitem value="FullName"
query="deptquery"
queryasroot="Department">
</cftree>
<br>
<input type="submit" value="Submit">
</cfform>
Example: multilevel tree control
When populating a
cftree
, you manipulate the structure of the tree by specifying a
cftreeitem
parent. In this example, every cf
treeitem
, except the top level, specifies
a parent. The
parent
attribute allows your
cftree
to show the relationships between
elements in the tree control. (This example populates the tree directly, not with a
query.)
<cfform name="form2" action="cfform_submit.cfm"
method="Post">
<cftree name="tree1" hscroll="No" vscroll="No"
border="No">
<cftreeitem value="Divisions">
<cftreeitem value="Development"
parent="Divisions" img="folder">
<cftreeitem value="Product One"
parent="Development">
<cftreeitem value="Product Two"
parent="Development">
<cftreeitem value="GUI"
parent="Product Two" img="document">
<cftreeitem value="Kernel"
parent="Product Two" img="document">
<cftreeitem value="Product Three"
parent="Development">
<cftreeitem value="QA"