Post on 18-Dec-2014
description
Introduction to Visualforce The Beginner’s Guide to a Custom UI
Samantha Ready, Developer Evangelist @samantha_ready Eric Wilson, Product Management Director
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Safe harbor Safe harbor statement under the Private Securities Litigation Reform Act of 1995: This presentation may contain forward-looking statements that involve risks, uncertainties, and assumptions. If any such uncertainties materialize or if any of the assumptions proves incorrect, the results of salesforce.com, inc. could differ materially from the results expressed or implied by the forward-looking statements we make. All statements other than statements of historical fact could be deemed forward-looking, including any projections of product or service availability, subscriber growth, earnings, revenues, or other financial items and any statements regarding strategies or plans of management for future operations, statements of belief, any statements concerning new, planned, or upgraded services or technology developments and customer contracts or use of our services. The risks and uncertainties referred to above include – but are not limited to – risks associated with developing and delivering new functionality for our service, new products and services, our new business model, our past operating losses, possible fluctuations in our operating results and rate of growth, interruptions or delays in our Web hosting, breach of our security measures, the outcome of intellectual property and other litigation, risks associated with possible mergers and acquisitions, the immature market in which we operate, our relatively limited operating history, our ability to expand, retain, and motivate our employees and manage our growth, new releases of our service and successful customer deployment, our limited history reselling non-salesforce.com products, and utilization and selling to larger enterprise customers. Further information on potential factors that could affect the financial results of salesforce.com, inc. is included in our annual report on Form 10-Q for the most recent fiscal quarter ended July 31, 2012. This documents and others containing important disclosures are available on the SEC Filings section of the Investor Information section of our Web site. Any unreleased services or features referenced in this or other presentations, press releases or public statements are not currently available and may not be delivered on time or at all. Customers who purchase our services should make the purchase decisions based upon features that are currently available. Salesforce.com, inc. assumes no obligation and does not intend to update these forward-looking statements.
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What can you do with Visualforce?
§ Framework to build custom user interfaces § Hosted natively on Force.com
§ Build streamlined UX
§ Create internal and public facing pages § Customize for different devices
§ Leverage other web technologies
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Model View Controller (MVC) Pattern Model Controller
View
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Model View Controller (MVC) Pattern Your Data Your Logic
Your Interface
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Model View Controller (MVC) Pattern Standard and
Custom Objects Standard
Controllers and Apex
Visualforce
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MVC Example
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Visualforce Markup
§ Visualforce tags • 80+ standard components
• Custom components
§ Works with all standard web technologies including:
• CSS
• JavaScript
• HTML
• Flash
• Any other Web-Enabled Code
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What do standard components look like?
apex: or chatter: prefix
Component name(examples: tables, repeats,
forms, etc)
Attributes to define component
Reference field (using dot notation)
Data binding to objects and class
variables
Merge field to define attribute (can also be a
string literal in some cases)
<apex:outputField value = “{!Restaurant__c.Address__c}” >
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Visualforce Controllers
§ Provides access to data § Logic for handling UI interaction
§ Standard Controllers • Same functionality as standard pages
– Save, delete, field access etc.
§ Custom Controllers • Written in Apex
• Override standard behavior
• Controller Extensions
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What does that look like in code?
Standard or custom objects
Defined at the page level
Custom controller logic
to extend standard
controllers
Inherit standard CRUD functionality.
If only using custom controllers, use controller=“controllerName”
= = <apex:page standardController “Restaurant__c” > extensions “yelpExtension, con2”
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How can I customize Visualforce?
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The Developer Console
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What can you do with Visualforce?
Custom Pages Dashboard Components
Custom Tabs Charts
Embedded Sections in Detail Pages
Implement Custom Logic
Email Templates
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What else can you do with Visualforce?
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Rich User Interfaces
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Complete Web Apps
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Mashups
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Mobile Visualforce
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BUT…
• Visualforce is NOT your first line of defense • Working knowledge of HTML, CSS, and JavaScript is
essential
• Visualforce has limits
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First Line of Defense
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Proficiency in Web Technologies
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Proficiency in Web Technologies
.button { background: #F8F8F8; background: linear-gradient(#F8F8F8, #D4DADC); background: -webkit-linear-gradient(#F8F8F8, #D4DADC); background: -moz-linear-gradient(#F8F8F8, #D4DADC); background: -o-linear-gradient(#F8F8F8, #D4DADC); background: -ms-linear-gradient(#F8F8F8, #D4DADC); filter: progid:DXImageTransform.Microsoft.gradient(...);}
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Limits
Page Size: 15MB Viewstate Size: 135KB
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If nothing else, remember this…
§ Visualforce is powerful – use it judiciously
§ If you don’t know basic HTML, CSS, and JavaScript concepts, no amount of Visualforce magic will help you
§ Pay attention to performance at all times
§ If you don’t know … ASK
http://developer.force.com | Boards | Visualforce
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Next Steps § developer.force.com
§ http://bit.ly/IntroVF-pkg § http://bit.ly/visualforce-workbook
§ Advanced Visualforce Webinar
§ “7 Habits of Highly Efficient Visualforce Pages”
§ “Building the New AppExchange Using Responsive Design”
DF Recorded Sessions
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Upcoming Events
December 5, 2012 Advanced Visualforce Webinar http://bit.ly/advvf-in
December 11, 2012 AppExchange for Developers Webinar http://bit.ly/appex-in
Check out the Developer Force calendar for upcoming local events such as meetups, workshops, and user group meetings: http://developer.force.com/Calendar
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Q&A
Samantha Ready Developer Evangelist,
@samantha_ready
Eric Wilson Product Management Director
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Thank you!
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