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Advanced http://picklebums.com/wp-content/uploads/2010/06/crayon-drawing.jpg

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Who is this guy? Nick Cooley Principal Front-End Architect, TandemSeven: http://www.tandemseven.com @nickcooley http://www.github.com/nickcooley

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Who is this guy? Nick Cooley Principal Front-End Architect, TandemSeven: http://www.tandemseven.com @nickcooley http://www.github.com/nickcooley

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What we’ll talk about in this session...• Recap of Sass/Compass• Advanced Sass • Control Structures • Color Functions• Advanced Compass • Geometric functions and constants• Application to Sencha Touch• DEMOS!

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What this Presentation ISN’T • Sass vs LESS vs Stylus • Why using a CSS Preprocessor is better than not using one • A conversation about how Preprocessors can bloat your CSSMany great articles arguing the merits/gotchas of using apre-processor. Here’s one I really agree with:http://bit.ly/SassisntbadMy personal opinion: “Like everything in technology,preprocessors are a tool in your arsenal. You shouldunderstand the fundamentals of CSS before relying on them.”

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What this Presentation ISN’T • Sass vs LESS vs Stylus • Why using a CSS Preprocessor is better than not using one • A conversation about how Preprocessors can bloat your CSSMany great articles arguing the merits/gotchas of using apre-processor. Here’s one I really agree with:http://bit.ly/SassisntbadMy personal opinion: “Like everything in technology,preprocessors are a tool in your arsenal. You shouldunderstand the fundamentals of CSS before relying on them.”

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What this Presentation ISN’T • How to code/structure CSSThe hope is that you have *some* CSSknowledge and are aware of best practices. Ifnot, here’s a great article for you: kiano.sh/Inxxym • How to build apps with Sencha TouchWhile we will go over examples that includedemo Sencha Touch apps, the focus really is onthe Sass/Compass and resulting CSS

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Let’s Recap:

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What is Sass?• Stands for “Syntactically Awesome StyleSheets”• “Sass both provides a simpler, more elegant syntax for CSS and implements various features that are useful for creating manageable stylesheets.”• The foundation for style implementations in ExtJS and Sencha Touch

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What is Sass?• Stands for “Syntactically Awesome StyleSheets”• “Sass both provides a simpler, more elegant syntax for CSS and implements various features that are useful for creating manageable stylesheets.”• The foundation for style implementations in ExtJS and Sencha Touch

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SassMost Popular Features:• Nesting• Variables• Mixins• Functions• @extend

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SassMost Popular Features:• Nesting• Variables• Mixins• Functions• @extend

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Sass: Nesting•Sass: Allows you to nest selectors within a parent selector.•This provides an approach that’s clean, concise, unique and DRY

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Sass: Nesting•Sass: Allows you to nest selectors within a parent selector.•This provides an approach that’s clean, concise, unique and DRY div { &.content { .element { h1 {...} } } } //outputs div.content .element h1 {...}

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Sass: Variables• Allow you to quickly parameterize your CSS• Create diverse variations in seconds!• Helps you create design standards for your CSS.• Using a main color in a number of

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Sass: Variables• Allow you to quickly parameterize your CSS• Create diverse variations in seconds!• Helps you create design standards for your CSS.• Using a main color in a number of $color: #fff; $pxHeight: 10px;

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Sass: Mixins• Mixins:Sass :: Functions:Javascript• Allow you to define patterns for reuse• Mixins can be imported across projects, helping you to create your own framework

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Sass: Mixins • Mixins:Sass :: Functions:Javascript • Allow you to define patterns for reuse • Mixins can be imported across projects, helping you to create your@mixin own framework pictos-iconmask($name) { .x-button .x-button-icon.x-icon-mask.#{$name} { -webkit-mask-image: theme_image($theme-name, "pictos/" +$name + ".png"); }}

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Compass• Collection of Sass mixins and variables• X-Browser CSS3 mixins • Rounded Corners • Box Shadow • Gradients • Text Shadow• Common CSS development Patterns • Reset.css • Sprites • Clearfix • Web Fonts • CSS3 Pie • More!

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Let’s turn it up to 11 http://4.bp.blogspot.com/_8lK2el5pnbU/S-dDjMziqsI/AAAAAAAAGMc/YkZMHVA2-5k/s1600/SpinalTap_.jpg

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Control Directives in SassVery similar to a number of controldirectives in languages like javascript,ruby, PHP -- Sass provides somerudimentary functionality:• if/else if/else• for• while

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@ifWorks like every “if” directive you’veever used (if, else if, else)• create exceptional cases determined by CSS controlled attribute OR• Sass also contains an “if” function which works as: if($condition, $if-

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@if examples• Example of default @if method implementation• Example of if() function method

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@if examples• Example of default @if method implementation@if $type == bevel {...}@else if $type == matte {...}@else {...}• Example of if() function method

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@if examples• Example of default @if method implementation@if $type == bevel {...}@else if $type == matte {...}@else {...}• Example of if() function methodborder: if($i%2==0, 1px solid #000, 4px solid #333);

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@forIs different from the “for” directive inmost programming languages• two types: “to” and “through”• cannot count down• can only iterate by one

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@for examples• Example of “to”• Example of “through”

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@for examples• Example of “to” @for $i from 1 to 3 { .item-#{$i} { width: 2em * $i; } } //outputs .item-1 {width: 2em; } .item-2 {width: 4em; }• Example of “through”

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@for examples• Example of “to” @for $i from 1 to 3 { .item-#{$i} { width: 2em * $i; } } //outputs .item-1 {width: 2em; } .item-2 {width: 4em; }• Example of “through” @for $i from 1 through 3 { .item-#{$i} { width: 2em * $i; } } //outputs .item-1 {width: 2em; } .item-2 {width: 4em; } .item-3 {width: 6em; }

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@whileIterates across a range of values usinga statement evaluation until it results infalse• can evaluate to < > ==• WARNING: you must adjust the evaluation variable manually

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@whileIterates across a range of values usinga statement evaluation until it results infalse• can evaluate to < > ==• WARNING: you must adjust the $i: 8; @while $i > 0 { evaluation variable manually .box#{$i} { $factor: 100px - ($i * 10); height:$factor !important; width:$factor !important; background: #333; $i: $i - 1; } }

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@eachIterates through a list of itemsindividually• Can include list as parameter or variable

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@eachIterates through a list of itemsindividually• Can include list as parameter or variable$list: (bob, steve, rob);@each $person in $list { .#{$person}{background-image: url($person);} }// CSS output.bob {background-image:url(bob); }.steve {background-image:url(steve); }.rob {background-image:url(rob); }

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Colors in SassOne of the least discussed features inSass are color features• Create themes/schemes/palettes based on harmonious color relationships• Mix colors using color relationships• Sass has operations for RGB and HSL

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Color Functions• complement• adjust-hue• lighten/darken• color math• AND MANY MORE!

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The Boxes• A really basic demo which shows various color functions/control directives

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Advance processing in CompassCompass may be a framework, but itprovides a number of helpful functionswhich can make interesting results:• Geometry functions: • sin(), cos(), tan(), pi()• Additional math functions: • e(), log(), sqrt()

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The benefits of advanced functionsWith these functions, you can:• Offload some of the processing for things you might do in javascript for faster performance• Be able to calculate in one place and not worry about it.• Do things like: • calculate coordinates on a circle • plot points on a graph • create some interesting designs using math!

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Demos

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HSL.clrpick.me• Starting off with a base color, generate related color-sets based on hsl relationships.• This can help you determine what colors might go with your initial color.• Color relationships are based on Sass color functions

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HSL.clrpick.me• Starting off with a base color, generate related color-sets based on hsl relationships.• This can help you determine what colors might go with your initial color.• Color relationships are based on Sass color functions

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So let’s put it all togetherHSL clrpick.me uses Sass/Compass for• Iterators• Positioning color swatches in 360 using Compass geometry• Adjusts color using pre-defined relationships

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So let’s put it all togetherHSL clrpick.me uses Sass/Compass for• Iterators• Positioning color swatches in 360 using Compass geometry• Adjusts color using pre-defined relationships

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First, an example

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First, an example

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The Color Wheel

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The Color Wheel

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The Color Wheel

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The Color Wheel@include circlefy(200, $deg);@mixin circlefy($radius, $deg){ $rad: angleToRadians($deg); @include radiansToCartesian($rad, $radius);}@function angleToRadians($a){ $pi: pi(); $angle: ($a) / 180; $radians: $pi * $angle; @return $radians;}@mixin radiansToCartesian($r, $radius){ $x: round($radius * cos($r)); $y: round($radius * sin($r)); top: #{$y}px; left:#{$x}px;}

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The S & L Bars

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The S & L Bars

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The S and L bars

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The S and L bars$light : lightness($colorwheel1);@for $i from 0 through 10 { &:nth-child(#{$i + 1}){ $startBackground: lighten($colorwheel1, 100); $val: $i * 10; background: darken($startBackground, $val ); span {margin-left:0; right:55px;} span:after {content: "lightness: #{$val} color:#{darken($startBackground, $val )}";} }}

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But hey, you said “Sencha Touch”Sencha Touch is a javascript frameworkwhich relies on Sass/Compass for itslook/feel.• Sencha has put together a really solid set of mixins: buttons, pictomasks, toolbars• There’s really no limit to what you can add using Sass/Compass specific

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But hey, you said “Sencha Touch”Sencha Touch is a javascript frameworkwhich relies on Sass/Compass for itslook/feel.• Sencha has put together a really solid set of mixins: buttons, pictomasks, toolbars• There’s really no limit to what you can add using Sass/Compass specific

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Sencha Touch DocsThroughout the Sencha Touchdocumentation, you’ll find predefinedmixins which you can use out-of-the-box

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ST2 DemoJust to show you that modifying Sass/Compass for Sencha Touch is just aseasy as it is for anything else....

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Links• Sass Site: sass-lang.com• Compass Site: compass-style.org• Compass.app Site: compass.handlino.com• HSL Color Picker: hsl.clrpick.me or github.com/nickcooley/clrpick.me• Manning Sass Book : manning.com/netherland/• LiveReload : livereload.com• FireSass : addons.mozilla.org/en-US/firefox/addon/firesass-for-firebug/