ACFD9 Unit 5 Slides ()

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Advanced
ColdFusion 9
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Unit 5: Developing Advanced
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1
Topics

Introducing ColdFusion AJAX functionality

Debugging ColdFusion AJAX Applications

Making Background Data Requests

Developing the User Interface

Working with Bind Expressions

Submitting Form Data Asynchronously

Using Special Text Input Fields

Working with <cfgrid>

Visualizing Data with Google Maps

Working with Video
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2
Introducing ColdFusion AJAX Functionality

ColdFusion 9 supports a number of tags and functions to help you
quickly build powerful AJAX applications.

Direct hooks for integrating with Adobe Spry and making data requests
to components

Data binding, with only minimal knowledge of JavaScript

Some of the technology was licensed from third-parties

EXT-JS 3.0 (http://www.extjs.com)

Yahoo Interface Library (http://developer.yahoo.com/yui)

FCK Editor (http://www.fckeditor.net)

Google Maps (http://code.google.com)
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3
ColdFusion 9 AJAX Features

A CFML-based tag abstration layer for creating AJAX applications

AJAX Debugger displaying background server communications and field binding activities.

Container tags that lay out or display content

Form elements that support data binding

A menu tag that creates hierarchical DHTML menus

User assistance features that provide tool tips, validation messages, and form completion

Facilities for styling AJAX compoents

Integration with Adobe Spry

Integration with Google Maps

A Flash-based media player, controllable from JavaScript, that plays multiple file formats

Background server requests through ColdFusion’s AJAX framework are
made to CFC methods with an access type of REMOTE

Data returned from remote methods can be automatically converted into
JavaScript Object Notation (JSON), XML (WDDX) or Plain text
®
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4
Debugging ColdFusion AJAX Applications

ColdFusion 9 includes a built-in debugger that monitors background
server requests, reporting any errors that are encountered and enabling
you to easily view the data returned from the server.

Use Firebug or the Microsoft IE developer toolbar to view similar
information, inspect the document object model, and dump the contents
of complex javascript data structures.
®
Copyright 2009 Adobe Systems Incorporated. All rights reserved. Adobe confidential.
5
Using the ColdFusion AJAX Logger

Since AJAX applications send data
requests to the server that are by
definition, invisible, ColdFusion 9
includes a built-in debugger that
monitors background server
requests, reporting any errors that
are encountered.

Enable the AJAX Debug log
window in the ColdFusion
Administrator

Pass the URL variable CFDEBUG
to the page running AJAX
components

The ColdFusion AJAX Logger will
appear right-justified on your page
®
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6
The ColdFusion Logging API

ColdFusion.Log.debug()

ColdFusion.Log.dump()

ColdFusion.Log.error()

ColdFusion.Log.info()
<script language=”Javascript”>
var aData = [{lastname:”drucker”,firstname:”steve”}];
ColdFusion.Log.dump(aData);
</script>
®
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7
Using Firebug

Firebug is a free, open source plug-in for Firefox

Available from http://getfirebug.com

Very powerful and intuitive

Inspect and edit HTML

Tweak CSS

Visualize CSS metrics

Monitor network activity

DOM inspection

Logging
®
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8
Using console.log()

You can output content to the Firebug console using the following
syntax:
console.log (“Hello World”);

You can pass as many arguments as you want to console.log and they
will be concatenated into a row as indicated here:
console.log(2,4,6,8,”foo”,bar);

You can pass any kind of object to console.log()

Complex data types will be displayed as hyperlinked elements,
functions, arrays, and objects

Clicking on a link inspects the data type using whichever Firebug tab is
appropriate
®
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9
Inspecting JavaScript Objects

When you return data from the
server as part of an AJAX call, its
often helpful to inspect the data.

Use console.dir() to inspect
complex data types

console.dir() logs an interactive
listing of an object’s properties

Calling console.dirxml(element)
on any HTML or XML element
displays an interactive tree-based
XML outline
®
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10
Walkthrough 1: Debugging AJAX Applications

Enable the ColdFusion AJAX Logger.

Use Firebug to inspect the contents of a JavaScript variable that
contains data returned from an AJAX request.
®
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11
Making Background Data Requests

Use <cfsprydataset> to bind a cfc method result to a JavaScript variable

Use controls that natively support binding to a CFC method such as
<cftree> and <cfgrid>

Use <cfajaxproxy> to create a client-side JavaScript proxy for a CFC
and its methods

Use the <cfajaxproxy> tag to bind fields of ColdFusion AJAX form
controls as parameters to a specific CFC function, JavaScript function,
or HTTP request, and specify JavaScript functions to handle successful
or error results

This course will not cover <cfsprydataset> or the Adobe Spry SDK
®
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12
Returning Data from Remote CFC Methods


Return data as either XML or in JavaScript Object Notation (JSON)
Use a ColdFusion function to convert your abstract data-type into either
XML or JSON inside your function and return the result as a string

serializeJSON()

deserializeJSON()

isJSON()

Use the RETURNFORMAT attribute of <cffunction> to specify the
encoding standard as Plain, WDDX, or JSON

Invoke the remote method by passing a url variable named
RETURNFORMAT with a value of Plain, WDDX, or JSON

Passing a url variable named RETURNFORMAT is preferred as it
enables the user of your service to choose whichever format is the
easiest for them to work with
®
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13
Returning JSON Data

JSON deserializes into native JavaScript data types, making it easier to
parse than XML

JSON is less verbose than XML, and therefore takes less time to
download resulting in marginally faster execution, depending on the size
of the dataset being transferred

JSON is well-supported by all the popular AJAX libraries including EXTJS, jQuery, and Spry

<cfajaxproxy>, <cfgrid>, and <cftree> automatically instruct your remote
methods to encode ColdFusion data types as JSON
®
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14
Example: Returning JSON Data
(test.cfc)
<cfcomponent>
<cffunction name="test"
access="remote" returntype="array">
<cfreturn ["A","B","C"]>
</cffunction>
</cfcomponent>
(test.cfm)
<a href=”test.cfc?method=test&returnformat=json”>
Click here to download the results as JSON
</a>
®
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15
Securing your AJAX Requests

Use the verifyclient=”yes” attribute of <cffunction> so that the service
can only be invoked via AJAX by other ColdFusion tags in your
application.

Enable a JSON Prefix
®
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16
Using VerifyClient

Requires remote invocations of the page or calls to functions on the
page to include an encrypted security token.

Helps prevent security attacks where an unauthorized party attempts to
perform an action on the server

You must enable client management or session management in your
application for this feature to operate properly

Using this feature restricts the invocation of your CFC method to pages
that respond to client-side ColdFusion AJAX features

Client-side CF AJAX features automatically send the proper security
token

Using this feature prevents a remote function from being invoked as a
web service
®
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17
Example: Using VerifyClient
<cfcomponent>
<cffunction name="test"
access="remote"
returntype="array"
verifyclient="true">
<cfreturn ["A","B","C"]>
</cffunction>
</cfcomponent>
®
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18
Using a JSON Prefix

Helps prevent JSON hijacking whereby a rogue site attempts to access
JSON content during the period from which you have left the site, but your
login credentials have not expired.

Prefixing your JSON with invalid JSON syntax prevents the rogue site’s
script from properly interpreting the JSON

ColdFusion’s AJAX tags automatically strips the JSON prefix before
evaluating your JSON data

If you are writing custom JavaScript that invokes a remote CFC method
using the returnformat=JSON URL parameter, you will need to add code to
strip the prefix before evaluating the JSON response

There are several ways to enable the JSON prefix:

In the ColdFusion Administrator (Server Settings > Settings)

In the Application.cfc
<cfset this.secureJSON = true>
<cfset this.secureJSONPrefix = “//”>

In the <cffunction> declaration:
<cffunction secureJSON=”true”
name=”r1” access=”remote”>
®
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19
Using <cfajaxproxy>

Allows you to register and invoke CFC methods in the background from
JavaScript.

Define a success handler that will receive a native Javascript data type
returned from your component methods

Define an error handler that executes if the specified component method
fails for any reason

Basic Syntax:
<cfajaxproxy
cfc = "CFC name"
jsclassname = "JavaScript proxy class name">
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20
Example: Using <cfajaxproxy>
(test.cfm)
<cfajaxproxy cfc="test" jsclassname="cfcTest">
<script language="JavaScript">
errorHandler = function(statusCode,statusMsg) {
alert(statusCode + ': ' + statusMsg)
}
successHandler = function(result){
alert(result);
}
getdata = function() {
/* instantiate CFC */
var remoteRequestObj = new cfcTest();
/* configure responders */
remoteRequestObj.setErrorHandler(errorHandler);
remoteRequestObj.setCallbackHandler(successHandler);
/* invoke method */
remoteRequestObj.echo("this is a test");
}
</script>
<cfform>
<cfinput type="button" name="btn"
value="Click Me" onClick="getdata()">
</cfform>
®
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21
Walkthough 2: Making Background Requests with
<cfajaxproxy>

Secure a web service so that it may only be invoked by ColdFusion
code located on the same server

Use <cfajaxproxy> to build an AJAX proxy for the spell-check service
that you created in unit 3
®
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22
Developing the User Interface

Container tags, such as dialog boxes and draggable windows

Form / Input tags that allow for data binding and a rich set of interactivity

Menu tags that create a x-browser DHTML hierarchical menu

User Assistance tags that support features like autosuggest. tooltips,
and progress bars
®
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23
Using Container Tags





<cfdiv>

Defines an area of a page that can have its contents dynamically updated without the need for a page reload

By default, it outputs a <div> tag

Can be used to output any HTML tag that supports a closing component
<cfpod>

Creates an area, wrapped as a box, that includes an optional title bar

Has independent scroll bars
<cflayout>

Used to control the appearance of content nested in <cflayoutarea> tags

Content can be arranged into different formats

tabs / accordion

expanding/collapsing grid

horizontal / vertical scrolling regions

Use the fittowindow attribute to have the layout control automatically adjust to the window size

A Javascript API exists that enables you to programatically modify a layout - ColdFusion.Layout.methodname
<cflayoutarea>

Denotes virtual “pages” of information inside of a <cflayout>

Attribute usage varies depending on the type of <cflayout>
<cfwindow>

Creates a virtual “pop-up” window within the browser

A draggable, scrolling window that cannot be blocked by popup-blockers

API enables client-side creation - ColdFusion.Window.createWindow()
®
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24
Using <cfdiv> to create a redraw region

The <cfdiv> tag creates an independent re-drawable area of the screen

By default, generates an HTML <div> tag along with Javascript functions
to dynamically replace its content

Content can be generated from a variety of sources

A Javascript function

A URL on the same server

A CFC method

Data typed into form fields on the same page
®
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25
Example: Using <cfdiv>
<cfform>
Complete the sentence below:
<cfinput type="text"
name="modifier">
<cfinput type="submit"
name="btnsubmit">
</cfform>
My instructor is a
<cfdiv bind="[email protected]}" tagName="span"> person

Note: You will learn about bind expressions later in this unit
®
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26
Using <cfpod> to display web content in a dialog box

The <cfpod> tag allows you to wrap content in a box containing a title
bar

Unlike <cfwindow>, the boxes drawn by <cfpod> cannot be dragged at
runtime by the end-user

Pod content can be defined by either specifying a URL through it's
SOURCE attribute, or, alternatively by placing HTML/CFML between its
starting and ending tags

While <cfpod> does allow you to change its header and body styles, it
can only be positioned on screen through the use of the <cflayout> tag
®
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27
Working with <cfpod> syntax
<cfpod source = "path"
bodyStyle = "CSS style specification"
headerStyle = "CSS style specification"
height = "number of pixels”
name = "string"
onBindError = "JavaScript function name"
title = "string"
width = "number of pixels"/>
or
<cfpod
bodyStyle = "CSS style specification"
headerStyle = "CSS style specification"
height = "number of pixels"
name = "string"
onBindError = "JavaScript function name"
title = "string"
width = "number of pixels">
pod contents
</cfpod>
®
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28
Using <cfajaximport>

If the SOURCE attribute of <cfpod> or any other container tag points to
a ColdFusion file that itself contains other ColdFusion AJAX-aware tags,
you must place a <cfajaximport> tag on the calling page

Use <cfajaximport> to specify the path to ColdFusion’s CFFORM
scriptSrc directory, if it is located somewhere other than
/CFIDE/scripts

<cfajaximport> also enables you to specify an alternative location for
the CSS files used in ColdFusion’s AJAX controls

The params attribute enables you to specify a Google Maps key

If you use a ColdFusion AJAX JavaScript function on a page that does
not otherwise import any AJAX JavaScript functions, use the
<cfajaximport> tag without any attributes import the base JavaScript
functions
®
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29
<cfajaximport> syntax
<cfajaximport
cssSrc = "local URL path"
params = "parameters"
scriptSrc = "local URL path"
tags = "comma-delimited list">

Example:
<html>
<head><title></title></head>
<body>
<cfajaximport tags="cflayout-tab,cfform" >
<cfpod title="Edit Article"
source="cflayout.cfm" />
</body>
</html>
®
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30
Using <cflayout> to define tabs and collapsible sections


The <cflayout> tag creates a region on screen that can be configured as
one of several different types of layouts

Border
A box with a border and up to five layout areas. Layout areas can be set to be collapsible
and closeable

HBox
A horizontal box where all child components are stacked horizontally

VBox
A vertical box where all child components are arranged vertically

Tab
A tabbed display where each child component occupies the full width/height of the defined
layout area and the user can toggle the display of each

Accordion
Similar in functionality to a tabbed panel, it enables you to compress many fields into a
compact space.
The immediate children of a <cflayout> tag must be <cflayoutarea> tags or
nondisplay tags whose bodies contain one or more <cflayoutarea> tags at
the top level
®
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31
Using <cflayout>
<cflayout
type="border|hbox|tab|vbox|accordion"
activeOnTop=”true|false”
align="center|justify|left|right”
fillHeight=”true|false”
fillWidth=”true|false”
fitToWindow=”true|false”
name="string"
padding="integer"
style="CSS style specification"
tabHeight="measurement"
tabPosition="top|bottom"
tabStrip=”true|false”
titleCollapse=”true|false”
width=”integer”
height=”integer”>
cflayoutarea tags
</cflayout>
®
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32
Using <cflayoutarea> to define virtual pages of a layout

A child tag of <cflayout>

Sets properties of semi-autonomous regions within the overall layout

Properties vary depending on layout type


Border

HBOX/VBOX

Tab

Accordion
See pages 5-19, 5-20 for attribute list
®
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33
<cflayout> example
<cfform style="padding-top:0px; margin-top:0px;">
<cflayout type="tab“ name="CrimeRecord"
tabheight="300">
<cflayoutarea
name="CrimeDetails"
title="Crime Details">
Details of crime go here
</cflayoutarea>
<cflayoutarea title="Narrative"
name="Narrative">
Wysiwyg area for Narrative goes here
</cflayoutarea>
</cflayout>
<div align="center">
<cfinput type="submit“ name="btnSubmit"
value="Save">
</div>
</cfform>
®
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34
Working with the <cflayout> JavaScript API

<cflayout> has a series of JavaScript functions that can be used to
programatically control layout areas through client-side scripting

The function names are case-sensitive
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35
<cflayout> JavaScript API Functions

ColdFusion.Layout.collapseArea()

ColdFusion.Layout.selectTab()

ColdFusion.Layout.createTab()

ColdFusion.Layout.hideTab()

ColdFusion.Layout.disableTab()

ColdFusion.Layout.showTab()

ColdFusion.Layout.enableTab()

ColdFusion.Layout.hideAccordion()

ColdFusion.Layout.getBorderLayout()

ColdFusion.Layout.showAccordion()

ColdFusion.Layout.getTabLayout()

ColdFusion.Layout.selectAccordion()

ColdFusion.Layout.expandArea()

ColdFusion.Layout.collapseAccordion()

ColdFusion.Layout.showArea()

ColdFusion.Layout.expandAccordion()

ColdFusion.Layout.hideArea()
®
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36
Example: <cflayout> JavaScript API
<script language="JavaScript">
function fnHelp() {
ColdFusion.Layout.createTab(
'CrimeRecord',
'help',
'Help',
'tabhelp.cfm',
{
inithide:false,
selected:true,
closable:true
}
)
}
</script>
<cfform style="padding-top:0px; margin-top:0px;">
<cflayout type="tab“ name="CrimeRecord” tabheight="300">
<cflayoutarea name="CrimeDetails” title="Crime Details">
Details of crime go here
</cflayoutarea>
<cflayoutarea title="Narrative" name="Narrative">
Wysiwyg area for Narrative goes here
</cflayoutarea>
</cflayout>
<div align="center">
<cfinput type="submit“ name="btnSubmit" value="Save">
<cfinput type="button" onClick="fnHelp()"
name="btnHelp" value="Help">
</div>
</cfform>
®
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37
Using <cfwindow>

The <cfwindow> tag allows you to embed a draggable window into your
web page

Similar to <cfpod>, but supports additional features


Automatic centering on a page

Draggable

Modal

Closable

Resizable

You can specify initial position

Full JavaScript API
Impervious to popup blockers
®
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38
Deploying <cfwindow>
<cfwindow
bodyStyle = "CSS style specification"
center="true|false"
closable="true|false"
draggable="true|false"
headerStyle = "CSS style specification"
height="number of pixels"
initShow="false|true"
minHeight="number of pixels"
minWidth="number of pixels"
modal="true|false"
name="string"
onBindError = "JavaScript function name"
refreshOnShow = "false|true"
resizable="true|false"
source="path"
title="string"
width="number of pixels"
x="numeric pixel coordinate"
y="numeric pixel coordinate">
window contents
</cfwindow>
®
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39
Using the <cfwindow> JavaScript API

ColdFusion.Window.show(‘name’);

ColdFusion.Window.onShow();

ColdFusion.Window.hide(‘name’);

ColdFusion.Window.onHide();

ColdFusion.Window.create();

ColdFusion.Window.getWindowObject();
®
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40
Using <cfwindow>
<cfwindow
center="yes"
width="200"
height="150"
name="mywindow"
title="My First Window"
closable="true" draggable="true"
resizable="true" initshow="true"/>
<cfform>
<cfinput
type="button"
name=”btnShow”
value="Show"
onClick="ColdFusion.Window.show('mywindow')">
<cfinput
type="button"
name=”btnHide”
value="Hide"
onClick="ColdFusion.Window.hide('mywindow')">
</cfform>
®
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41
Walkthrough 3: Using Layout Controls

Define a tabbed-based layout

Use the ColdFusion <cflayout>
API
®
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42
Working with Bind Expressions

Enables you to create dependencies between form elements, client-side
recordsets, ColdFusion AJAX container elements, and information
fetched from background data requests

Bindings minimize the need to develop custom JavaScript

You cannot use a bind expression to bind to controls in a dynamically
loaded region (i.e. a <cflayoutarea> tag that specifies a SOURCE
attribute or a <cfselect> that specifies a QUERY attribute)
®
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43
Working with Bind Expression Syntax

You can bind data to all AJAX-aware ColdFusion tags

The syntax varies, depending on the source of the data and the tag that
is using the expression
Type
Bind Expression Syntax
CFC Method
CFC:componentpath.functionName(params)
JavaScript function
javascript:functionName(params)
URL
url:URL?params
URL
URL?params
String / Field Concatenation
A string containing one or
more instances of a bind
parameter such as:
{firstname}.{lastname}@{domain}
®
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44
Example: Bind Expressions
(test.cfc)
<cfcomponent>
<cffunction
name="echo"
access="remote"
returntype="string"
securejson="true" >
<cfargument name="myinput" type="string">
<cfreturn myinput>
</cffunction>
</cfcomponent>
(test.cfm)
<cfdiv
bind="cfc:test.echo('This is a test')" />
®
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45
Binding Text Fields with the @modifier

Input field bindings are specified by placing the name of the field in curly
braces, i.e. a text field named myfield is represented in a bind
expression as {formname:myfield}, or simply {myfield}

Use the @keyup modifier to cause a binding to update as a user types
data into a dependent field

Use @click to cause a binding to update when a user clicks in a field

Without using the modifier, the binding updates when the cursor focus
changes to a different field

In the following example, the email field is updated as a user types into
either the firstname, lastname, or email fields:

Do not use @keyup with CFC bind expressions as it would trigger a
CFC request every time the user types a character into a bound field.
®
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46
Example: Binding Textfields with the @modifier
<cfform>
First Name:<br />
<cfinput type="text" name="firstname"><br />
Last Name:<br >
<cfinput type="text" name="lastname"><br />
Domain:<br>
<cfinput type="text" name="domain"><br />
E-Mail:<br />
<cfinput type="text"
name="email“
bind="[email protected][email protected]}@[email protected]}">
<br />
<cfinput name="btnSubmit" type="submit">
</cfform>
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47
Example: Binding to a JavaScript Function
<html>
<head>
<script language="javascript">
emailAddress = function(firstname,lastname,domain) {
return (firstname.substring(0,1) +
lastname + '@' + domain);
}
</script>
</head>
<body>
<cfform>
First Name:<br />
<cfinput type="text" name="firstname"><br />
Last Name:<br />
<cfinput type="text" name="lastname"><br />
Domain:<br />
<cfinput type="text" name="domain"><br />
E-Mail:<br />
<cfinput type="text" name="email"
bind="javascript:emailAddress([email protected]},[email protected]},[email protected]})">
<br/>
<cfinput name="btnSubmit" type="submit">
</cfform>
</body>
</html>
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48
Binding to <cfselect>

Binding to text fields requires that your bind expression return a string

By default, bind expressions in a <cfselect> are used to populate its
OPTIONS array

To populate the select box options your bind expression must return a
two-dimensional array

The first element represents the VALUE attribute of the <option> tag

The second element represents the TEXT attribute of the <option> tag

There is no built-in support for specifying the SELECTED attribute of a
bound option

One strategy for specifying the SELECTED option of a select-one box is
to arrange your array so that the selected item is at array position zero
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49
Example: Binding to <cfselect>
<script language=”JavaScript”>
getOffenses = function(offense) {
aData = new Array();
aData[0] = new Array();
/* set default option if necessary*/
if (offense == null || offense == '') {
offense = "Please Select";
}
/* set first option in array to selected item*/
aData[0][0] = offense;
aData[0][1] = offense;
/* Use <cfoutput> to cache options in browser */
<cfoutput query="qCrimeTypes">
aData[#currentrow#]=new Array();
aData[#currentrow#][0] = '#jsStringFormat(qCrimeTypes.offense)#';
aData[#currentrow#][1] = '#jsStringFormat(qCrimeTypes.offense)#';
</cfoutput>
/* remove selected item */
for (var i=1; i<aData.length; i++) {
if (aData[i][0] == offense)
aData.splice(i,1);
}
}
return aData;
}
</script>
...
<cfselect name="offense"
bind="javascript:getOffenses([email protected]})“
bindonload="true" />
®
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50
Using a Bind Expression with <cfajaxproxy>

You can configure <cfajaxproxy> to execute based on a change of form
data

This approach requires that you code less Javascript for event-driven
structures than the <cfajaxproxy> examples presented earlier in this unit

<cfajaxproxy> syntax using a bind expression uses the following syntax:
<cfajaxproxy
bind = "bind expression"
onError = "JavaScript function name"
onSuccess = "JavaScript function name">
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51
Example: <cfajaxproxy> with bind expression
<cfajaxproxy
bind="cfc:employee.getlastnamebyid({userid})"
onerror="errorHandler"
onsuccess="successHandler">
<script language="JavaScript">
errorHandler = function(statusCode,statusMsg) {
alert(statusCode + ': ' + statusMsg)
}
successHandler = function(result) {
document.forms[0].lastname.value = result;
}
</script>
<cfform>
Enter a user id:
<cfinput type="text" name="userid" value=""><br />
Last Name:
<cfinput type="text" name="lastname" value=""><br />
</cfform>
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52
Walkthrough 4: Using Bind Expressions

Modify the data entry form from the prior walkthrough to make
background data requests and populate form fields

Use <cfajaxproxy> to connect to a remote CFC method

Use bind expressions to populate different types of form fields
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53
Submitting Form Data Asynchronously

By default when a form is submitted the layout container that holds the form will be
overwritten by the result from the form's ACTION page

You can override this default behavior by using the ColdFusion 9 javascript method
ColdFusion.Ajax.submitForm()

The method sends your form data through the XMLHttpRequest() object, posting it to
whatever URL you wish

Note that you could also submit form data directly to ColdFusion CFC methods
through the <cfajaxproxy> technique discussed previously.

Use ColdFusion.Ajax.submitForm() to quickly AJAX-enable pre-existing forms

Due to a limitation in the underlying XMLHttpRequest() object, you are not be able
to post <input type="file"> fields

The content generated by the action page is returned to the callback handler function
-- so be sure to trim extraneous whitespace from your output

You will need to explicitly invoke CFFORM validation and/or code your own clientside validation routines
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54
Using ColdFusion.Ajax.submitForm()
<script language="JavaScript">
ColdFusion.Ajax.submitForm(
formId,
URL
[
,callbackhandler
,errorhandler
,httpMethod
,asynch]
);
</script>
®
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55
Explicitly invoking CFFORM Validation

CFFORM validation is invoked by applying REQUIRED and VALIDATE
attributes to your <CFINPUT> tags.

ColdFusion.Ajax.submitForm() does not invoke the generated client-side
javascript validation functions

The name of the controller function is _CF_checkformname where
formname is the value of the name attribute assigned to your form

The validation function returns true if all fields comply with their
validation rules

You should pass the entire form as a Javascript object to the generated
form validation function as indicated here:
if (_CF_checkmyform(document.myform)) {
/* your form data passed! Now submit it! */
}
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56
Retrieving Object/Attribute Values

Use the ColdFusion JavaScript API method
ColdFusion.getElementValue() in order to get the value of an attribute of
a bindable ColdFusion control

Supports most CF input widgets

cfgrid

cfinput (checkbox, datefield, file, hidden, radio, text)

cfselect

cftextarea

cftree
if (ColdFusion.getElementValue('offense') ==
{
alert("You must select an offense");
return;
}
'Please Select')
®
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57
Building the Action Page

Whatevever content is output on the action page is returned to the
ColdFusion.Ajax.submitForm() success method

Submit your form variables for processing to a CFC method

Disable CF debugging output on the action page using
<cfsetting showdebugoutput=”false”>

Tightly control whitespace generation using
<cfsetting enablecfoutputonly=”true”>

The following example illustrates a typical action page which pases form
data to a CFC method and tightly controls the text output that is
transmitted to the ColdFusion.Ajax.submitForm() success handler:
®
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58
Example: AJAX Action Page
<cfsetting showdebugoutput="no">
<cfsetting enablecfoutputonly="true">
<!--- write to db --->
<cfset cfcCrimeService =
createObject("#application.settings.cfcpath#crime").init(
application.googleMapKey,
form.id,
form.blocksiteaddress,
"Washington",
"DC",
0.1)>
<cfset cfcCrimeService.update(
form.offense,
'',
form.narrative,
form.reportdatetime
)>
<cfoutput>Record #form.id# Saved</cfoutput>
®
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59
Deploying ColdFusion.Ajax.submitForm()

See example, pages 5-41, 5-42
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60
Walkthrough 5: Asynchronously Submitting Forms

Programatically trigger ColdFusion’s client-side form validation routines

Inspect the value of a <cfselect> box

Submit form data to an action page asynchrously using
ColdFusion.Ajax.submitForm()
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61
Using Special Text Input Fields


ColdFusion 9 has a series of rich form controls that extend the native
functionality of a standard text field and textarea. These include the
following:

Autosuggest

Graphical Date Chooser

WYSIWYG Editor
The AJAX form controls are derived from the EXT-JS 3.0 framework
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62
Using Autosuggest Text Fields

A variant on the standard <cfinput type="text"> field

The goal is to limit the number of characters a user must type in order to
select an item

As a user types into the field, a box with suggestions appears beneath it

The data that populates the selection list can be either statically
declared, or can be read dynamically from a ColdFusion component
method

Use the AUTOSUGGESTMINLENGTH attribute to reduce the number of
requests to the server and the amount of data that will be returned

The basic syntax for implementing an autosuggest box is the following:
<cfinput name="userName"
type="text"
autosuggest="Dave, Steve, Sue">
®
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63
Using Autosuggest with a limited data set

You can hardcode values into the AUTOSUGGEST attribute of <cfinput
type="text"> as indicated below

This method is best used when the data set is limited to fewer than one
hundred entries
<cfquery name="qs”
cachedwithin="#createtimespan(365,0,0,0)#">
select statename from state order by statename
</cfquery>
<cfform>
<div style="float: left“>Enter the State:</div>
<cfinput
name="statename"
type="text"
autosuggest="#valuelist(qs.statename)#">
<br /><br />
</cfform>
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64
Using Autosuggest with large data sets

There may be scenarios where, due to data volume, it is not practical to
specify the autosuggest data set as a comma delimited string

Use a bind expression whereby a user's input is passed in the
background to a ColdFusion component method

The CFC method must be defined with ACCESS="REMOTE"

The CFC method must return an array of strings

The typed text can be passed into the CFC method using the {cfautosuggestvalue}
bind parameter
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65
Example: Using Autosuggest with large data sets
<!--- (cfc method) --->
<cffunction name="getCrimeIDs” access="remote“ returntype="array“
output="false">
<cfargument name="searchstring" type="String">
<cfset local.q = "">
<cfquery name="q" >
select id
from crime
where convert(id,char(10)) like
<cfqueryparam
cfsqltype="cf_sql_varchar"
value="#arguments.searchstring#%">
limit 0,10
</cfquery>
<cfreturn listToArray(valuelist(q.id))>
</cffunction>
<!--- front-end GUI --->
<cfinput
type="text”
name="id"
validate="numeric"
autosuggest="cfc:#application.settings.cfcpath#crimeservice.getCrimeIDs(
{cfautosuggestvalue})">
®
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66
Customizing Autosuggest Behavior

autosuggestBindDelay

autosuggestMinLength

delimiter

matchContains

maxResultsDisplayed

onBindError

showAutosuggestLoadingIcon

typeahead
®
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67
Working with the DateField Selector

Like the autosuggest feature, the graphical date chooser is implemented
through the <cfinput> tag

Gives the user a date entry field with an expanding calendar from which
users select the date or dates

The user has the option to type in a date instead of using the gui
selector

You can customize the appearance of the calendar

Use the dayNames attribute to specify acomma-delimited list that sets the names of
the weekdays displayed in the calendar

The monthNames attribute controls the names of the months that appear in the
calendar. Specify as a comma delimited list.

The firstDayOfWeek attribute is an integer in the range 0-6 that specifies the first day
of the week in the calendar: 0 indicates Sunday; 6 indicates Saturday.
®
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68
Example: Using the DateField Selector
<label for="reportdatetime">
Report Date:
</label>
<cfinput
type="datefield"
name="reportdatetime"
bind="[email protected]}"
required="yes"
validate="date" />
<br />
®
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69
Using the WYSIWYG Editor

Implemented through the <cftextarea richtext=”yes”> tag

An abstraction layer for the CK Editor (www.ckeditor.com)

Highly configurable allowing you to potentially restrict functionality to
specific groups of users


Develop custom toolbars

Specify allowable styles

Enable its built-in spell checker
You cannot use the WYSIWYG editor if your ColdFusion server is
configured to process htm files
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<cftextarea> attributes

Width

Height

fontFormats

fontSizes

MaxLength

BasePath

Skin

sourceForTooltip

Toolbar
®
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71
Customizing the Editor Toolbar

You can define custom toolbars for the editor by modifying the
FCKConfig.Toolbarsets variable located in
/CFIDE/scripts/ajax/FCKEditor/fckconfig.js file as indicated below

Adding to the variable makes additional options available via the
TOOLBAR attribute of <cftextarea>

You will need to customize the editor in order to support uploading
media, including images and Flash

Additional developer documentation is available at
http://docs.cksource.com
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Example: Customizing the Editor Toolbar
FCKConfig.ToolbarSets["MyCustomToolbar"] = [
['Bold',
'Italic',
'-',
'OrderedList',
'UnorderedList',
'-',
'Link',
'Unlink',
'-'
],
[
'Cut',
'Copy',
'Paste',
'-',
'Image',
'Flash',
'About'
]
];
®
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73
Specifying Allowed WYSIWYG Styles

You can configure specific styles to be supported by the editor

Styles are defined using XML

Default styles are defined in /CFIDE/scripts/ajax/FCKEditor/fckstyles.xml

Create additional style definitions using the following syntax and link
them to <cftextarea> using the STYLESXML attribute
®
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Example: Adding WYSIWYG Styles
<Styles>
<Style name="Image on Left" element="img">
<Attribute name="style"
value="padding: 5px; margin-right: 5px" />
<Attribute name="border" value="2" />
<Attribute name="align" value="left" />
</Style>
<Style name="Image on Right" element="img">
<Attribute name="style"
value="padding: 5px; margin-left: 5px" />
<Attribute name="border" value="2" />
<Attribute name="align" value="right" />
</Style>
<Style name="Custom Bold" element="span">
<Attribute name="style"
value="font-weight: bold;" />
</Style>
<Style name="Custom Italic" element="em" />
<Style name="Title" element="span">
<Attribute name="class" value="Title" />
</Style>
<Style name="Code" element="span">
<Attribute name="class" value="Code" />
</Style>
<Style name="Title H3" element="h3" />
<Style name="Custom Ruler" element="hr">
<Attribute name="size" value="1" />
<Attribute name="color" value="#ff0000" />
</Style>
</Styles>
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75
Using the <cftextarea richtext=”yes”> javascript API

You can programatically get and set the data in a <cftextarea> using the
following JavaScript methods:

ColdFusion.RichText.getEditorObject(editorID).GetHTML()
Retrieves the html contained by the WYSIWYG editor

ColdFusion.RichText.setValue(editorID, replacementHTML)
Replaces the contents of the WYSIWYG editor with the specified html
function fnReplace(formID,WYSWYGID,searchFor,replaceTerm)
{
var msgbox = document.forms['myform'][WYSIWYGID].id;
var html =
ColdFusion.RichText.getEditorObject(msgbox).GetHTML();
ColdFusion.RichText.setValue(msgbox,
html.replace(searchFor, replaceTerm));
}
®
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76
Extending the WYSIWYG editor

Review the following lins that detail how to unlock hidden features of
<cftextarea>

Implementing Spell Checking and File Uploads in the WYSIWYG editor
http://www.rakshith.net/blog/?p=58

The CKEditor Documentation
http://docs.cksource.com/
®
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77
Walkthrough 6: Implementing Rich Text Controls

Define and configure an autosuggest field as well as its associated
bindings

Define and configure a datefield control

Use <cftextarea> to invoke a CKEditor control
®
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78
Working with <cfgrid>

<cfgrid type=”html”> is AJAX-enabled and can load data incrementally
from the server

Allows for client-side sorting of rows

Supports boolean column values (rendered as checkboxes)

Supports drop-down lists in columns (combobox)

Allows the user to choose from a datepicker from within date columns

Allows for row grouping

Supports a grid title

Expand/collapse functionality

Text fields can bind to grid data using bind=”{gridname.columnname}”
®
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Deploying <cfgrid type=”html”> for use with large datasets

Working with <cfgrid> and large datasets involves incrementally fetching
“pages” of records from a ColdFusion component through a bind
expression.

Pagination Attributes:

bind

BindOnLoad

PageSize

PreservePageOnSort

StripeRowColor

StripeRows
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80
Defining the Bind Expression


Pass four variables to the CFC method responsible for returning dynamic
data

{cfgridpage}

{cfgridpagesize}

{cfgridsortcolumn}

{cfgridsortdirection}
Example:
<cfgrid format="html"
name="incidentGrid"
collapsible="yes"
title="Crime Incidents"
bind="cfc:crimeservice.getForGrid({cfgridpage},{cfgridpagesize},{cfgridsortcolumn},{cfgridsortdirection})"
striperows="yes”
striperowcolor="cccccc"
width="450"
height="200"
pagesize="5"
autowidth="true"
colheaderbold="true">
<cfgridcolumn name="reportdatetime" type="date" width="50" header="Date">
<cfgridcolumn name="offense" type="combobox" header="Offense" width="50">
<cfgridcolumn name="blocksiteaddress" type="string_noCase" header="Address" width="220">
</cfgrid>
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81
Returning Query Data for a Grid

The CFC method access must equal REMOTE

The CFC method must return a STRUCT

The query data returned from the CFC must be returned through the
ColdFusion function QueryConvertForGrid()

QueryConvertForGrid() accepts the following arguments:

The query to be converted

The grid page number

The number of rows per page
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Example: Returning Data for a Grid
<cffunction name="getforgrid" access="remote" returntype="struct" output="false">
<cfargument name="page">
<cfargument name="pageSize">
<cfargument name="gridsortcolumn">
<cfargument name="gridsortdirection">
<cfset local.q = "">
<cfif arguments.gridsortcolumn is "">
<cfset arguments.gridsortcolumn = "reportdatetime">
</cfif>
<cfif arguments.gridsortdirection is "">
<cfset arguments.gridsortdirection = "asc">
</cfif>
<cfquery name="q">
select blocksiteaddress,id, offense, narrative,
DATE_FORMAT(reportdatetime,'%m/%d/%Y') as reportdatetime
from crime
order by
<cfqueryparam cfsqltype="cf_sql_varchar" value="#arguments.gridsortcolumn#”>
<cfqueryparam cfsqltype="cf_sql_varchar" value="#arguments.gridsortdirection#">
</cfquery>
<cfreturn queryConvertForGrid (q,arguments.page,arguments.pagesize)>
</cffunction>
®
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83
Making a Grid Editable

<cfgrid> attributes:

Use the selectmode=”edit” attribute to render a grid editable

Use the delete=”yes” attribute to allow the users to delete rows

Use insert=”yes” to allow users to insert rows

Pass data from the grid to a ColdFusion component method by specifying a bind
expression in the onchange attribute of the grid

Date values must be in a supported format (i.e. mm/dd/yyyy)

Specify <cfgridcolumn> types

Boolean

Date

Combobox

Numeric

String_nocase
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84
Example: Making a Grid Editable
<cfgrid
selectmode=”edit”
name=”crimegrid” ... >
<cfgridcolumn type="date"
name="reportdatetime"
width="50" header="Date">
<cfgridcolumn type="combobox"
values="#valuelist(qoffenses.offense)#"
name="offense"
header="Offense"
width="50" >
<cfgridcolumn
type="string_noCase"
name="blocksiteaddress"
header="Address“
width="220“>
</cfgrid>
®
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85
Example: Making a Grid Editable
®
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86
Using <cfgrid selectmode=”edit”> Bind Parameters

The onchange bind expression should pass the following information to
the CFC method

{cfgridaction}

{cfgridrow}

{cfgridchanged}
<cfgrid
selectmode=”edit”
onChange="cfc:#application.settings.cfcpath#.crimeservice.setFromGrid(
{cfgridaction},
{cfgridrow},
{cfgridchanged})"
....
</cfgrid>
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87
Saving Data from a Grid
<cffunction
<cfargument
<cfargument
<cfargument
name="setFromGrid" access="remote" returntype="boolean" verifyclient="yes">
name="cfgridaction" required="yes" type="string" Hint="I, U or D">
name="cfgridrow" required="yes" type="struct">
name="cfgridchanged" required="yes" type="struct">
<cfswitch expression="#arguments.cfgridaction#">
<cfcase value="D">
<cfquery>
delete from crime where id =
<cfqueryparam cfsqltype="cf_sql_numeric" value="#arguments.cfgridrow.id#">
</cfquery>
</cfcase>
....
</cfswitch>
<cfreturn true>
</cffunction>
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88
Controlling a Grid using the JavaScript API

Use ColdFusion.Grid.getGridObject() to access the underlying Ext JS
library methods

ColdFusion.Grid.refresh() forces the grid to reload and redisplay data

ColdFusion.Grid.sort() programmatically sorts the grid

There is not a native method for updating a grid’s contents

The following method allows you to programmatically change the
contents of a grid control:
function gridSetElementValue(gridname,row,column,thevalue)
{
var objGrid = ColdFusion.Grid.getGridObject(gridname);
objRow = objGrid.store.data.items[row];
objRow.set(column,thevalue);
objGrid.view.refreshRow(row);
}
®
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89
Determining the active row

The function must be declared within the <head> section of the page

You must use ColdFusion’s ajaxOnLoad() function to invoke the event
listener definition
<script language="Javascript">
var selectedRow = 0;
initGrid = function()
{
var grid = ColdFusion.Grid.getGridObject("incidentGrid");
grid.addListener("rowclick", function(objGrid, rowNumber, e){
selectedRow = rowNumber;
});
}
</script>
<cfset ajaxOnload("initGrid")>
®
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90
Walkthrough 7: Using <cfgrid>

Define an editable <cfgrid> control

Bind a grid to a ColdFusion remote method

Bind form fields to grid data

Transmit grid updates to ColdFusion for processing

Push data from form fields into a grid
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Visualizing Data with Google Maps

Currently, ColdFusion supports
only embedding of Google maps

To generate a map, you must
provide a valid Google map API
key

You must specify a map center
position as either a
latitude/longitude or a valid street
address

End-users must be able to access
subdomains of google.com from
their web browsers and Javascript
must be enabled

You can attach custom events to
map markers
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Acquiring a Google Maps Key

You must create a Google account in order to work with most of Google's API's

If you already have a GMail account, then you're ready to proceed

Sign up for a Google account at www.google.com/accounts/NewAccount

License keys are tied to both your Google account and the domain name where your
application will be hosted

Get a free license key at http://code.google.com/apis/maps/signup.html

Google Maps has specific licensing terms

There is no limit on the number of page views you may generate per day using the Maps API

There is a limit on the number of geocode requests per day

The Maps API does not include advertising

Your service must be freely accessible to end users

You may not alter or obscure the logos or attribution on the map

Maps should not be used to display illegal activity (such as locations to procure illicit drugs) or
reveal personal information

If your service is not freely accessible, you will need to contact Google to discuss paid-license
terms
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Acquiring a Google Maps Key
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Registering your Google Maps Key with ColdFusion

In the ColdFusion Administrator (Server Settings > Settings)

Set this.googlemapkey in the Application.cfc file

Use the <cfajaximport> tag
<cfajaximport params="#{googlemapkey='Map API Key'}#">
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Using <cfmap> and <cfmapitem>

<cfmap> dictactes the overall look and feel of the map

<cfmapitem> places map markers on the map

You can the center position by using either the centeraddress attribute
or the centerlatitude and centerlongitude attributes.
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<cfmap> syntax
<cfmap
centeraddress="address"
centerlatitude="latitude in degrees"
centerlongitude="longitude in degrees"
collapsible="true|false"
continuouszoom="true|false"
doubleclickzoom="true|false"
height="integer"
hideborder=""
markerbind="bind expression"
markercolor="marker color"
markericon="icon path
"
markerwindowcontent="content"
name="name"
onerror="JavaScript function name"
onload="JavaScript function name"
overview="true|false"
scrollwheelzoom="true|false"
showallmarkers="true|false"
showcentermarker="true|false"
showmarkerwinodw=""true|false"
showscale="true|false"
tip="center property marker tips"
title="string"
type="map|satellite|hybrid|earth|terrain"
typecontrol="none|basic|advanced"
width="integer"
zoomcontrol="none|small|large|small3d|large3d"
zoomlevel="integer"
<!--- zero or more <cfmapitem> tags --->
<cfmapitem
address="address"
latitude="latitude in degrees"
longitude="longitude in degrees"
markercolor="marker color"
markericon="icon path
"
markerwindowcontent="content"
name="name of the map"
showmarkerwinodw=""true|false"
tip="marker tip" />
</cfmap>
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Example: Using <cfmap>
<cfmap centeraddress="#form.address# Washington, DC"
type="map"
width="400"
height="200"
typecontrol="basic"
zoomcontrol="small3d"
showcentermarker="true"
showmarkerwindow="true"
zoomlevel="17"
name="crimemap"
onload="resizeMap">
<cfloop query="qincidents">
<cfmapitem
latitude = "#qincidents.lat#"
longitude= "#qincidents.lng#"
markercolor="FF3030"
markerwindowcontent="<span class='map'>#qincidents.offense#<br
/>#qincidents.narrative#<br />#qincidents.reportdatetime#</span>">
</cfloop>
</cfmap>
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Controlling a <cfmap> with JavaScript

ColdFusion.Map.addEvent()

ColdFusion.Map.addMarker()

ColdFusion.Map.getLatitudeLongitude()

ColdFusion.Map.getMapObject()

ColdFusion.Map.setCenter()

ColdFusion.Map.setZoomLevel()
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Example: Adding a Map Event Listener
ColdFusion.Map.addEvent("crimemap","click",function(overlay)
{
if (overlay != null)
{
var myPano =
new
GStreetviewPanorama(document.getElementById("streetview"),
{latlng:overlay.getLatLng()});
}
});
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Walkthrough 8: Using <cfmap>

Use <cfmap> to instantiate a map

Plot data points on a map

Link the map to Google Street View
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Working with Video

<cfmediaplayer>

Supports multiple formats


FLV

MP3

MP4
Progressive downloads and streamed content from a Flash Media
Server via RTMP
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<cfmediaplayer> syntax
<cfmediaplayer
align="alignment option"
autoplay="true|false"
bgcolor="hexadecimal value"
hideborder="true|false"
hidetitle="true|false"
controlbar="true|false"
fullScreenControl="yes|no"
name="name"
onComplete="JavaScript function name"
onLoad="JavaScript function name"
onStart="JavaScript function name"
quality="low|high|medium"
source="source name"
style=="style specification"
height="integer"
width="integer"
wmode="window|opaque|transparent">
</cfmediaplayer>
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103
Styling the Media Player

Use the style attribute
<cfmediaplayer
name="myplayer"
style="bgcolor:EDC393; titletextcolor:C0C0C0;
titlebgcolor:EDC393; controlbarbgcolor:EDC393;
controlscolor:FFFFFF; progressbgcolor:DDDDDD;
progresscolor:A0B1D5; borderleft:20; borderright:20;
bordertop:10; borderbottom:13"
hideborder="false"
hideTitle=false
controlbar="true"
source="myfile.flv">
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Using the <cfmediaplayer> JavaScript API

ColdFusion.Mediaplayer.resize()

ColdFusion.Mediaplayer.setMute()

ColdFusion.Mediaplayer.setSource()

ColdFusion.Mediaplayer.setVolume()

ColdFusion.Mediaplayer.startPlay()

ColdFusion.Mediaplayer.stopPlay()
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Example: Using the <cfmediaplayer> JavaScript API
<script language=”JavaScript”>
function playVideo(url)
{
ColdFusion.Mediaplayer.setSource(‘mediaplayer’,url);
ColdFusion.Mediaplayer.startPlay(‘mediaplayer’);
}
</script>
<select
name="videourl“
onChange="playVideo(this.options[this.selectedIndex].value)”>
<option value="/acfd9/assets/video/sample1.flv">Camera 1</option>
<option value="/acfd9/assets/video/sample2.flv">Camera 2</option>
</select>
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106
Walkthrough 9: Using <cfmediaplayer>

Use the <cfmediaplayer> tag to instantiate a media player

Use the <cfmediaplayer> JavaScript API to play selected videos
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107
Summary

Use the ?debug url variable to help you troubleshoot ColdFusion-AJAX applications

ColdFusion supports four layout tags - <cfwindow>, <cfpod>, <cflayout>, and <cfdiv>

ColdFusion has a JavaScript API to programmatically manipulate layout controls on the client

Use the BIND attribute to link form fields with data from CFC methods, URL's, and JavaScript

Use the ColdFusion.Ajax.submitForm() method to post form data asynchronously

ColdFusion 9 supports several "rich form" controls

Message Box

Progress Bar

AutoSuggest

WYSIWYG

Grid

Tree

Datefield

Use <cfmap> to plot locations on a Google Map

You can extend the built-in functionality of AJAX controls by getting access to their underlying
JavaScript objects

Use <cfmediaplayer> to progressively download a video or stream one from a Flash Media Server
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108
Unit Review

How do you enable debugging of a CF-AJAX application?

Describe the differences between <cfpod> and <cfwindow>

What kind of data structure must be returned from a cfc method bound to an autosuggest element?.

How can you create custom toolbars for the WYSIWYG editor?

How do you incrementally populate an HTML grid with data from a CFC method?

What information is required in order to plot a point on a Google Map?

You cannot attach special click handlers to a Google Map (true/false)?

Which video formats are supported by <cfmediaplayer>?
®
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109
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