Populates a form tree control, created with the cftree tag, with one or more elements.
<cftreeitem value = "text
" bind = "bind expression
" display = "text
" expand = "yes|no" href = "URL
" img = "filename
" imgopen = "filename
" parent = "parent name
" query = "queryname
" queryAsRoot = "yes|no" target = "URL target
"> OR <cftreeitem bind = "bind expression
"> onBindError = "JavaScript function name
"
ColdFusion 8: Added the bind and onBindError attributes.
cfapplet, cfform, cfformgroup, cfformitem, cfgrid, cfinput, cfselect, cfslider, cftextarea, cftree; "Building tree controls with the cftree tag" and "Using HTML format trees" in the ColdFusion Developer's Guide
Attribute |
Req/Opt; Format |
Default |
Description |
---|---|---|---|
value |
Required for applet, Flash, XML. value or bind is required for HTML. |
|
Value passed when the form containing the tree is submitted. When populating a tree with data from a cfquery, you can specify multiple columns to use in a delimited list; for example, value = "dept_id,emp_id". In this case, each column generates an item that is a child of the column that precedes it in the list. |
bind |
value or bind is required for HTML |
|
A bind expression specifying a CFC function, JavaScript function, or URL that dynamically gets all tree nodes. You can use this attribute only at the top level of the tree, and in this case, the tree can have only cftreeitem tag. If you use the bind attribute, the only other allowed attribute is onBindError. For details creating trees that using binding, see "Using HTML format trees" in the ColdFusion Developer's Guide |
display |
Optional; All |
value |
Tree item label. When populating a tree with data from a query, specify names in a delimited list, for example: display = "dept_name,emp_name" |
expand |
Optional; All |
yes |
|
href |
Optional; All |
|
URL to link to if the user clicks the tree item. If you use a query attribute, the href attribute can specify a query column that contains URLs. If href is not a query column, the attribute text must be a URL or list of URLs. When populating a tree with data from a query, specify the URLs in a comma-delimited list, for example: href = "http://dept_svr,http://emp_svr" |
img |
Optional; Applet, HTML, object |
folder |
Image name, filename, or file URL for tree item icon. The following values are provided:
You can also specify a custom image. To do so, include path and file extension; for example: img = "../images/page1.gif" You can also specify a path relative to the web root. Custom images are not supported for Flash format. To specify more than one image in a tree, or an image at the second or subsequent level, use commas to separate names, corresponding to level; for example: img = "folder,document" img = ",document" (example of second level) |
imgopen |
Optional; Applet, HTML, object |
|
Icon displayed with open tree item, as described for the img attribute. |
onBindError |
Optional; HTML |
see Description |
The name of a JavaScript function to execute if evaluating a bind expression results in an error. The function must take two attributes: an HTTP status code and a message. If you omit this attribute, and you specified a global error handler (by using the ColdFusion.setGlobalErrorHandler function), it displays the error message; otherwise a default error pop-up appears. |
parent |
Optional; All |
|
Value of the tree item parent. Determines the item's placement in the tree hierarchy. If omitted, the item is placed at the tree root level, or if the queryAsRoot attribute is True, directly under the query. |
query |
Optional; All |
|
Query name to use to populate the treeitem. ColdFusion generates an item for each field value in the query column list specified by the value attribute. The fields in each row are hierarchically linked to the first column. |
queryAsRoot |
Optional; All |
yes |
Applies only if you specify a query attribute. Defines the query as the root level for all items generated by this tag. This attribute lets you avoid creating a parent cftreeitem.
|
target |
Optional; All |
|
Target attribute of href URL. When populating a tree with data from a query, specify targets in a comma-delimited list, for example: target = "FRAME_BODY,_blank" |
For this tag to work properly. the browser must be JavaScript-enabled. This tag must be a child of a cftree tag.
The cftreeitem tag has three basic formats:
The following example creates a simple tree by using a single cftreeitem tag and a query:
<cfform action = "#cgi.script_name#"> <cftree name = "Employees" height = "400" width = "200"> <cftreeitem value="LastName, FirstName, Emp_ID" query="getEmployees" queryAsRoot="False"> </cftree> </cfform>
The following example creates a tree that shows the basic information about all employees in an organization, organized by department. The departments are expanded to show all employees. You click the + signs to display additional information. If you click the employee name, ColdFusion links back to the same page and displays the selected employee's ID.
<!--- Query the datasource to get employee information.---> <!--- Group the output by Department. (All fields are required in Group By clause.) ---> <cfquery name = "GetEmployees" dataSource = "cfdocexamples"> SELECT Emp_ID, FirstName, LastName, EMail, Phone, Department FROM Employees GROUP BY Department, Emp_ID, FirstName, LastName, EMail, Phone </cfquery> <html> <body> <h3>cftreeitem Example</h3> <!--- The following runs if the user clicked on a link in the tree. A complete application would use the ID for additional processing. ---> <cfif isdefined("URL.user_ID")> <cfoutput> <!--- URL.cftreeitemkey is the selected tree item's value attribute. ---> You Requested information on #URL.cftreeitemKey#; User ID #URL.user_ID# </cfoutput> <br><br> </cfif> <!--- Display the tree. The cftree tag must be in a cfform. ---> <cfform> <cftree name = "Employees" height = "400" width = "200" font = "Arial Narrow" highlighthref="No" hscroll="No"> <!--- cfoutput tag with a group attribute loops over the departments. ---> <cfoutput group="Department" query = "GetEmployees"> <cftreeitem value="#Department#" parent="Employees" expand="yes"> <!--- This cfoutput tag loops over the records for the department. The cfoutput tag does not need any attributes. ---> <cfoutput> <!--- Create an item for each employee in the department. Do not expand children. Each employee name links to this page, and sends the employee ID in the query string.---> <cftreeitem value = "#LastName#, #FirstName#" display = "#LastName#, #FirstName#" parent = "#Department#" expand="no" href="#cgi.script_name#?user_id=#emp_id#"> <!--- Each Employee entry has ID and ContactInfo children. ---> <cftreeitem value = "#Emp_ID#" display = "Employee ID: #Emp_ID#" parent = "#LastName#, #FirstName#"> <!--- Each node must be unique value, so use Emp_ID om value. ---> <cftreeitem value = "#Emp_ID#_ContactInfo" display = "Contact Information" parent = "#LastName#, #FirstName#" expand = "No"> <!--- ContactInfo has two children. ---> <cftreeitem value = "#Phone#" parent = "#Emp_ID#_ContactInfo"> <cftreeitem value = "#Email#" parent = "#Emp_ID#_ContactInfo"> </cfoutput> </cfoutput> </cftree> </cfform>