Welcome!

You will be redirected in 30 seconds or close now.

ColdFusion Authors: Yakov Fain, Jeremy Geelan, Maureen O'Gara, Nancy Y. Nee, Tad Anderson

Related Topics: ColdFusion

ColdFusion: Article

Constructing an Application with Flash Forms from the Ground Up

You can do much more with them than with simple forms

panelBorderStyle: 'roundCorners';
The upper corners of a panel are always round by default. The bottom corners aren't, so we use this property to make them round like the top corners.

You may be wondering why we need to use double # when specifying the colors. That's necessary because otherwise ColdFusion will interpret them as variables and throw a compile error. It's similar to the character escaping required when outputting html with inline font colors inside <cfoutput> tags

The other two panels have similar properties with different color values. In addition, the small panel at the bottom has no header, given by the style "headerHeight:0."

Step 7 - More User Interactivity
So far we have some functionality like populating the Preview and Edit panels on user selection of a contact in the contact list. We'll add some more interactivity by showing or hiding panels and changing the label of the buttons depending on the current activity.

When we first load the application, we see the list of contacts on the left, the Preview panel on the right, and a small panel with a checkbox at the bottom. We don't see the Edit panel. Why? Because it's hidden, we are in "view" mode. (See Figure 5.) Also note that the checkbox at the bottom "Show Edit Window" is unchecked.

<cfinput type="checkbox" name="editShow" checked="false" label="Show Edit Window" />

If we want to edit the selected contact, we can click the checkbox and the bottom panel will appear and the top panel will shrink (). We achieve that effect by binding two attributes of the panel, the visibility and height, to the state of the checkbox:

<cfformgroup type="panel" label="Edit"
visible="{editShow.selected}" height="{editShow.selected ? 332 : 0 }">

We can access the checked state of checkboxes by reading the "selected" property. In this case, if the checkbox is selected, it will set the visible property of the panel as true and the height of the panel will be set as 332 pixels, effectively making it bigger and shrinking the upper panel. On the other hand, if the checkbox isn't checked, the height of the panel will be 0 pixels and its visible property will be false.

But that's not the only way we can show the bottom panel. If we want to add a new contact, we need the Edit panel to be visible and all its fields empty ready for new data (see Figure 6). If you remember, there was a button at the bottom of the contact list labeled "Add contact." If the button is clicked, we want to show a clean Edit panel:

<cfinput type="button" name="addContact" value="Add Contact"
onClick="contactList.selectedIndex = undefined; resetForm();
editShow.selected = true;" />

As you can see, the ActionScript code of the onClick attribute has three statements:

contactList.selectedIndex = undefined
which removes any current selection in the contact list,

resetForm()
a built-in function that cleans all the data in the form fields, and

editShow.selected = true
which simply checks the editShow checkbox but, as we know, that triggers a couple of events because the Edit panel properties are bound to the checkbox state.

That's not all though. In "new" mode, there's only one submit button in the bottom panel "Add New," whereas in Edit mode, there are two, "Delete" and "Apply Changes." How do we make that button appear and disappear? By now we're sure you may be guessing that we can use binding in the visible attribute of the delete button.

<cfinput type="submit" name="deleteContact"
visible="{contactList.selectedItem != undefined}" value="Delete" />

The two submit buttons "Delete" and "Add New/Apply changes" simply submit the form. What we get on the server are the values of the fields just like an html form. We're sure you're familiar with html forms so we won't go over the server-side functionality. The beauty is that if you already have a regular html form, you can easily convert it into a flash form because once the form is submitted, everything looks the same, be it a flash form or an html form.

Conclusion
We've gone a long way towards making our application interface more user-friendly. And we've done that only with flash forms! We hope you'll start exploring this new feature; you'll find there's a lot more you can do with it. .

More Stories By Nahuel Foronda

Nahuel Foronda is one of the founders of Blue Instant (http://www.blueinstant.com), a web development firm specializing in Rich Internet Applications where he has been creating award-winning applications and offering training for the last five years. He also maintains a blog, called AS Fusion (http://www.asfusion.com), where he writes about Flash, ColdFusion and other web technologies.

More Stories By Laura Arguello

Laura Arguello is one of the founders of Blue Instant (http://www.blueinstant.com), a web development firm specializing in Rich Internet Applications where she has been creating award-winning applications and offering training for the last five years. She also maintains a blog, called AS Fusion (http://www.asfusion.com), where she writes about Flash, ColdFusion and other web technologies.

Comments (11) View Comments

Share your thoughts on this story.

Add your comment
You must be signed in to add a comment. Sign-in | Register

In accordance with our Comment Policy, we encourage comments that are on topic, relevant and to-the-point. We will remove comments that include profanity, personal attacks, racial slurs, threats of violence, or other inappropriate material that violates our Terms and Conditions, and will block users who make repeated violations. We ask all readers to expect diversity of opinion and to treat one another with dignity and respect.


Most Recent Comments
RockDad 11/06/08 01:39:48 PM EST

How would one modify this app to only allow employees to edit their own information assuming there is a cookie identifier already setup?

RockDad 11/03/08 02:08:32 PM EST

GREAT tutorial but how does one bind a cfselect object with the grid? Tried it and it doesn't work. Any ideas?

Mike 01/23/08 12:19:45 PM EST

where can I get the source code for this article - "Constructing an Application with Flash Forms from the Ground Up"

wholesale ipod 10/30/07 01:18:03 AM EDT

I think so!

Garfield 07/24/05 07:47:15 PM EDT

Great article by great developers. I have just starting using CF7 and thanks to many writers out there, I have developed some impressive forms. Please visit the www.asfusion.com site for more helpful info.

Michael, visit http://www.cfform.com/flashforms/invoke.cfm?objectid=0204C17F-4E22-1671-... for a tutorial on binding grids to selects. Be mindful that when binding to a grid, the bind is both case and type sensitive to the DB columns.

Michael White 07/17/05 07:39:37 PM EDT

Your article was a good introduction to flash forms with multiple panels. I have a question on the Edit panel... what if some of your fields are CFSELECT dropdowns or date fields... having trouble finding working syntax for binding them to the grid.

Andrew 07/06/05 11:40:46 PM EDT

Loved the article! It has taught me alot. Maybe I am at fault here but I am not able to get any of this to save or edit in a db anyone else having same problem

Laura Arguello 06/27/05 08:30:39 PM EDT

Thank you for the comments.
While the link gets fixed, you can download the source code from http://www.asfusion.com/blog/files/cfforms/cfdj_source.zip

Anthony 06/25/05 05:40:50 PM EDT

How do I download the source files for this article?

[email protected]

Stiles 06/25/05 11:53:31 AM EDT

I'm having a similar problem with getting the source code for this article. The printed version states that the source code can be downloaded at www.cfdj.com. This URL is invalid and not a site maintained by Sys-Con. Any chance the link can be updated so we can view the source code?

Much appreciative.

André 06/24/05 09:48:25 AM EDT

Hi,

Thank you for the article, I found it very informative, well written and helpfull. I am having difficulties with the save content section. How could one download the source code ?Could it be possible to modify the link to open on the file rather to to another site that does not seem to be CF Dev. Journal ?

Again that you for sharing.

@ThingsExpo Stories
22nd International Cloud Expo, taking place June 5-7, 2018, at the Javits Center in New York City, NY, and co-located with the 1st DXWorld Expo will feature technical sessions from a rock star conference faculty and the leading industry players in the world. Cloud computing is now being embraced by a majority of enterprises of all sizes. Yesterday's debate about public vs. private has transformed into the reality of hybrid cloud: a recent survey shows that 74% of enterprises have a hybrid cloud ...
In his keynote at 19th Cloud Expo, Sheng Liang, co-founder and CEO of Rancher Labs, discussed the technological advances and new business opportunities created by the rapid adoption of containers. With the success of Amazon Web Services (AWS) and various open source technologies used to build private clouds, cloud computing has become an essential component of IT strategy. However, users continue to face challenges in implementing clouds, as older technologies evolve and newer ones like Docker c...
DXWorldEXPO LLC announced today that ICC-USA, a computer systems integrator and server manufacturing company focused on developing products and product appliances, will exhibit at the 22nd International CloudEXPO | DXWorldEXPO. DXWordEXPO New York 2018, colocated with CloudEXPO New York 2018 will be held November 11-13, 2018, in New York City. ICC is a computer systems integrator and server manufacturing company focused on developing products and product appliances to meet a wide range of ...
Business professionals no longer wonder if they'll migrate to the cloud; it's now a matter of when. The cloud environment has proved to be a major force in transitioning to an agile business model that enables quick decisions and fast implementation that solidify customer relationships. And when the cloud is combined with the power of cognitive computing, it drives innovation and transformation that achieves astounding competitive advantage.
Cloud-enabled transformation has evolved from cost saving measure to business innovation strategy -- one that combines the cloud with cognitive capabilities to drive market disruption. Learn how you can achieve the insight and agility you need to gain a competitive advantage. Industry-acclaimed CTO and cloud expert, Shankar Kalyana presents. Only the most exceptional IBMers are appointed with the rare distinction of IBM Fellow, the highest technical honor in the company. Shankar has also receive...
Michael Maximilien, better known as max or Dr. Max, is a computer scientist with IBM. At IBM Research Triangle Park, he was a principal engineer for the worldwide industry point-of-sale standard: JavaPOS. At IBM Research, some highlights include pioneering research on semantic Web services, mashups, and cloud computing, and platform-as-a-service. He joined the IBM Cloud Labs in 2014 and works closely with Pivotal Inc., to help make the Cloud Found the best PaaS.
In his Opening Keynote at 21st Cloud Expo, John Considine, General Manager of IBM Cloud Infrastructure, led attendees through the exciting evolution of the cloud. He looked at this major disruption from the perspective of technology, business models, and what this means for enterprises of all sizes. John Considine is General Manager of Cloud Infrastructure Services at IBM. In that role he is responsible for leading IBM’s public cloud infrastructure including strategy, development, and offering m...
DXWorldEXPO LLC announced today that All in Mobile, a mobile app development company from Poland, will exhibit at the 22nd International CloudEXPO | DXWorldEXPO. All In Mobile is a mobile app development company from Poland. Since 2014, they maintain passion for developing mobile applications for enterprises and startups worldwide.
Headquartered in Plainsboro, NJ, Synametrics Technologies has provided IT professionals and computer systems developers since 1997. Based on the success of their initial product offerings (WinSQL and DeltaCopy), the company continues to create and hone innovative products that help its customers get more from their computer applications, databases and infrastructure. To date, over one million users around the world have chosen Synametrics solutions to help power their accelerated business or per...
We are seeing a major migration of enterprises applications to the cloud. As cloud and business use of real time applications accelerate, legacy networks are no longer able to architecturally support cloud adoption and deliver the performance and security required by highly distributed enterprises. These outdated solutions have become more costly and complicated to implement, install, manage, and maintain.SD-WAN offers unlimited capabilities for accessing the benefits of the cloud and Internet. ...
Founded in 2000, Chetu Inc. is a global provider of customized software development solutions and IT staff augmentation services for software technology providers. By providing clients with unparalleled niche technology expertise and industry experience, Chetu has become the premiere long-term, back-end software development partner for start-ups, SMBs, and Fortune 500 companies. Chetu is headquartered in Plantation, Florida, with thirteen offices throughout the U.S. and abroad.
Dion Hinchcliffe is an internationally recognized digital expert, bestselling book author, frequent keynote speaker, analyst, futurist, and transformation expert based in Washington, DC. He is currently Chief Strategy Officer at the industry-leading digital strategy and online community solutions firm, 7Summits.
Bill Schmarzo, author of "Big Data: Understanding How Data Powers Big Business" and "Big Data MBA: Driving Business Strategies with Data Science," is responsible for setting the strategy and defining the Big Data service offerings and capabilities for EMC Global Services Big Data Practice. As the CTO for the Big Data Practice, he is responsible for working with organizations to help them identify where and how to start their big data journeys. He's written several white papers, is an avid blogge...
I think DevOps is now a rambunctious teenager - it's starting to get a mind of its own, wanting to get its own things but it still needs some adult supervision," explained Thomas Hooker, VP of marketing at CollabNet, in this SYS-CON.tv interview at DevOps Summit at 20th Cloud Expo, held June 6-8, 2017, at the Javits Center in New York City, NY.
"MobiDev is a software development company and we do complex, custom software development for everybody from entrepreneurs to large enterprises," explained Alan Winters, U.S. Head of Business Development at MobiDev, in this SYS-CON.tv interview at 21st Cloud Expo, held Oct 31 – Nov 2, 2017, at the Santa Clara Convention Center in Santa Clara, CA.
Major trends and emerging technologies – from virtual reality and IoT, to Big Data and algorithms – are helping organizations innovate in the digital era. However, to create real business value, IT must think beyond the ‘what’ of digital transformation to the ‘how’ to harness emerging trends, innovation and disruption. Architecture is the key that underpins and ties all these efforts together. In the digital age, it’s important to invest in architecture, extend the enterprise footprint to the cl...
Data is the fuel that drives the machine learning algorithmic engines and ultimately provides the business value. In his session at Cloud Expo, Ed Featherston, a director and senior enterprise architect at Collaborative Consulting, discussed the key considerations around quality, volume, timeliness, and pedigree that must be dealt with in order to properly fuel that engine.
Two weeks ago (November 3-5), I attended the Cloud Expo Silicon Valley as a speaker, where I presented on the security and privacy due diligence requirements for cloud solutions. Cloud security is a topical issue for every CIO, CISO, and technology buyer. Decision-makers are always looking for insights on how to mitigate the security risks of implementing and using cloud solutions. Based on the presentation topics covered at the conference, as well as the general discussions heard between sessio...
IoT is rapidly becoming mainstream as more and more investments are made into the platforms and technology. As this movement continues to expand and gain momentum it creates a massive wall of noise that can be difficult to sift through. Unfortunately, this inevitably makes IoT less approachable for people to get started with and can hamper efforts to integrate this key technology into your own portfolio. There are so many connected products already in place today with many hundreds more on the h...
No hype cycles or predictions of zillions of things here. IoT is big. You get it. You know your business and have great ideas for a business transformation strategy. What comes next? Time to make it happen. In his session at @ThingsExpo, Jay Mason, Associate Partner at M&S Consulting, presented a step-by-step plan to develop your technology implementation strategy. He discussed the evaluation of communication standards and IoT messaging protocols, data analytics considerations, edge-to-cloud tec...