CSS Archives | Page 5 of 11 | portalZINE NMN | Development meets Creativity

14. May 2016

Options to detect when a @font-face has been loaded

OPTION 1

Use the CSS font loading API. Not supported in all browsers yet (MDN, W3C). You can call document.fonts to get a FontFaceSet object.

check(fontSpec) – returns whether all fonts in the given font list have been loaded and are available. The fontSpec uses the CSS shorthand syntax for fonts.
Example: document.fonts.check('bold 16px Roboto'); // true or false
document.fonts.ready – returns a Promise indicating that font loading and layout operations are done.

alert('Roboto loaded? ' + document.fonts.check('1em Roboto'));  // false

document.fonts.ready.then(function () {
  alert('All fonts in use by visible text have loaded.');
   alert('Roboto loaded? ' + document.fonts.check('1em Roboto'));  // true
});

document.fonts.onloadingdone = function (fontFaceSetEvent) {
   alert('onloadingdone we have ' + fontFaceSetEvent.fontfaces.length + ' font faces loaded');
};

alert('Roboto loaded? ' + document.fonts.check('1em Roboto')); // false

document.fonts.ready.then(function () {

alert('All fonts in use by visible text have loaded.');

alert('Roboto loaded? ' + document.fonts.check('1em Roboto')); // true

});

document.fonts.onloadingdone = function (fontFaceSetEvent) {

alert('onloadingdone we have ' + fontFaceSetEvent.fontfaces.length + ' font faces loaded');

};

OPTION 2

Use Font Face Observer – its a small @font-face loader and monitor compatible with any web font service. It will monitor when a web font is applied to the page and notify you. It does not limit you in any way in where, when, or how you load your web fonts. Unlike the Web Font Loader Font Face Observer uses scroll events to detect font loads efficiently and with minimum overhead.

var font = new FontFaceObserver('My Family', {
  weight: 400
});

font.load().then(function () {
  console.log('Font is available');
}, function () {
  console.log('Font is not available');
});

var font = new FontFaceObserver('My Family', {

weight: 400

});

font.load().then(function () {

console.log('Font is available');

}, function () {

console.log('Font is not available');

});

GitHub

OPTION 3

Use jQuery-FontSpy.js, works by checking the change in width of a string.

fontSpy('My Icons', {
  glyphs: '\ue81a\ue82d\ue823',
  success: function() {
    //alert("My Icons loaded successfully");
  },
  failure: function() {
    //alert("My Icons failed to load");
  }
});

fontSpy('My Icons', {

glyphs: '\ue81a\ue82d\ue823',

success: function() {

//alert("My Icons loaded successfully");

failure: function() {

//alert("My Icons failed to load");

}

});

GitHub

OPTION 4

Use Webfont Loader, if loading fonts from Typekit , Fonts.com, Google, Fontdeck or custom location.

This introduces the following events:

loading – This event is triggered when all fonts have been requested.
active – This event is triggered when the fonts have rendered.
inactive – This event is triggered when the browser does not support linked fonts or if none of the fonts could be loaded.
fontloading – This event is triggered once for each font that’s loaded.
fontactive – This event is triggered once for each font that renders.
fontinactive – This event is triggered if the font can’t be loaded.

<script src="https://ajax.googleapis.com/ajax/libs/webfont/1.6.16/webfont.js"></script>
<script>
  WebFont.load({
    google: {
      families: ['Droid Sans', 'Droid Serif']
    }
  });
</script>

WebFont.load({

google: {

families: ['Droid Sans', 'Droid Serif']

}

});

</script>

GitHub

Enjoy coding …

5. May 2016

BackgroundCheck – Automatically switch to a darker or a lighter version of an element

BackgroundCheck automatically switches to a darker or a lighter version of an element depending on the brightness of images behind it.

Pretty amazing and useful, when doing long one-pagers with switching section backgrounds and navigation elements hovering above them.

p.background--light {
  color: black;
}

p.background--dark {
  color: white;
}

p.background--complex {
  color: gray;
}

p.background--light {

color: black;

}

p.background--dark {

color: white;

}

p.background--complex {

color: gray;

}

// Check all elements with a .target class against all images on a page
BackgroundCheck.init({
  targets: '.target'
});

// Specific images
BackgroundCheck.init({
  targets: '.target',
  images: '.thumbnails'
});

// Check all elements with a .target class against all images on a page

BackgroundCheck.init({

targets: '.target'

});

// Specific images

BackgroundCheck.init({

targets: '.target',

images: '.thumbnails'

});

BackgroundCheck

4. May 2016

Thumbnail, snapshot or PDF generation from an url or html page with Snappy

“Snappy is a PHP5 library allowing thumbnail, snapshot or PDF generation from a url or a html page. It uses the excellent webkit-based wkhtmltopdf and wkhtmltoimage available on OSX, Linux, Windows.”

GitHub

4. May 2016

A pure CSS tooltip library – Hint.CSS

Only CSS. No JavaScript!
Small file size. Only 1.5KB minified and gzipped!
Easy to use. No config required.
Works in all modern browsers.

GitHub

4. May 2016

Splitter / Split Pane / Docker options

SPLIT PANES / DOCKER allow you to display multiple areas, either side by side or one on top of each other. Nested layouts are often part of it. By dragging a divider that appears between the areas, the user can specify how much of the total width / height goes to each area.

I have been building a backend interface in the past weeks, that forced me to look into ways to organize the workspace more efficiently . I could code my own splitter, but is not a priority right now and makes no sense to always reinvent the wheel :)

Here some of the options out there…

Pure jQuery UI

This uses the jQuery UI draggable component and provides limited options :)

 $('.splitter').draggable({
    axis: 'x',
    containment: '#content',
    distance: 0,
    drag: function(event, ui) {
      var width = $('#content').width();
      $('#content .leftpane').css({ width: ui.position.left + 'px' });
      $('#content .rightpane').css({
        left: ui.position.left + 1 + 'px',
        width: (width - ui.position.left + 1) + 'px'
      });
    },
    refreshPositions: true,
    scroll: false
  });

$('.splitter').draggable({

axis: 'x',

containment: '#content',

distance: 0,

drag: function(event, ui) {

var width = $('#content').width();

$('#content .leftpane').css({ width: ui.position.left + 'px' });

$('#content .rightpane').css({

left: ui.position.left + 1 + 'px',

width: (width - ui.position.left + 1) + 'px'

});

refreshPositions: true,

scroll: false

});

jQuery UI

Layout, has not been updated for a long time, but still provides a huge amount of options and methods to handle almost anything. Version 2.0 was announced, but never showed up. Google Groups / GitHub / Documentation
ProPanelLayout (Commercial)

jQuery Plugins

Pure Jasvascript

Split.js (Split Pane)
Golden Layout (Docker)
Dock Spawn (Docker)

CSS only

CSS3 Splitview

Enjoy coding …

30. April 2016

Flexible JavaScript charting with Canvas using Chart.js

Visualize your data in 8 different ways; each of them animated and customizable.
Great rendering performance across all modern browsers (IE9+)
Redraws charts on window resize for perfect scale granularity.

<canvas id="myChart" width="400" height="400"></canvas>

1	<canvas id="myChart" width="400" height="400"></canvas>

// Any of the following formats may be used
var ctx = document.getElementById("myChart");
var ctx = document.getElementById("myChart").getContext("2d");
var ctx = $("#myChart");

// Any of the following formats may be used

var ctx = document.getElementById("myChart");

var ctx = document.getElementById("myChart").getContext("2d");

var ctx = $("#myChart");

<canvas id="myChart" width="400" height="400"></canvas>
<script>
var ctx = document.getElementById("myChart");
var myChart = new Chart(ctx, {
    type: 'bar',
    data: {
        labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],
        datasets: [{
            label: '# of Votes',
            data: [12, 19, 3, 5, 2, 3]
        }]
    },
    options: {
        scales: {
            yAxes: [{
                ticks: {
                    beginAtZero:true
                }
            }]
        }
    }
});
</script>

var ctx = document.getElementById("myChart");

var myChart = new Chart(ctx, {

type: 'bar',

data: {

labels: ["Red", "Blue", "Yellow", "Green", "Purple", "Orange"],

datasets: [{

label: '# of Votes',

data: [12, 19, 3, 5, 2, 3]

}]

options: {

scales: {

yAxes: [{

ticks: {

beginAtZero:true

}

}]

}

});

</script>

GitHub

18. April 2016

Be amazed by the Responsive Filemanager with Adobe Aviary integration

“Responsive FileManager is a free open-source file manager and image manager made with jQuery, CSS3, PHP and HTML5 that offers a nice and elegant way to upload and insert files, images and videos.
You can use it as external plugin for TinyMCE, CKEditor and CLEditor or as a stand-alone file manager to manage and select files.”

USAGE WITH TINYMCE

tinymce.init({
    selector: "textarea",theme: "modern",width: 680,height: 300,
    plugins: [
         "advlist autolink link image lists charmap print preview hr anchor pagebreak",
         "searchreplace wordcount visualblocks visualchars insertdatetime media nonbreaking",
         "table contextmenu directionality emoticons paste textcolor responsivefilemanager code"
   ],
   toolbar1: "undo redo | bold italic underline | alignleft aligncenter alignright alignjustify | bullist numlist outdent indent | styleselect",
   toolbar2: "| responsivefilemanager | link unlink anchor | image media | forecolor backcolor  | print preview code ",
   image_advtab: true ,
   
   external_filemanager_path:"/filemanager/",
   filemanager_title:"Responsive Filemanager" ,
   external_plugins: { "filemanager" : "/filemanager/plugin.min.js"}
 });

tinymce.init({

selector: "textarea",theme: "modern",width: 680,height: 300,

plugins: [

"advlist autolink link image lists charmap print preview hr anchor pagebreak",

"searchreplace wordcount visualblocks visualchars insertdatetime media nonbreaking",

"table contextmenu directionality emoticons paste textcolor responsivefilemanager code"

toolbar1: "undo redo | bold italic underline | alignleft aligncenter alignright alignjustify | bullist numlist outdent indent | styleselect",

image_advtab: true ,

external_filemanager_path:"/filemanager/",

filemanager_title:"Responsive Filemanager" ,

external_plugins: { "filemanager" : "/filemanager/plugin.min.js"}

});

Responsive filemanager / GitHub

16. April 2016

Docker layouts with GoldenLayout

GoldenLayout is a web based docker layout engine that aids in creating flexible user interfaces by enabling panels to be docked on the screen.

Native popup windows
Completely themeable
Comprehensive API
Powerful persistence
Works in IE8+, Firefox, Chrome

GitHub & Demo

10. April 2016

Take a screenshot of a DOM container and use it as a background image

I am currently developing a drag and drop interface for a course builder. Courses are split into lessons and lessons into slides. While switching between slides, I wanted to have a small thumbnail representing the current slide content.

One option would have been to use something like PhantomJS / CasperJS. A headless browser , to take a screenshot of the slide. I have done that in the past and it works perfectly.

This time, I decided to go with another solution, that allows me to convert html to a canvas element.

The project is called html2canvas (GitHub).

“This script allows you to take screenshots of webpages or parts of it, directly on the users browser. The screenshot is based on the DOM and as such may not be 100% accurate to the real representation as it does not make an actual screenshot, but builds the screenshot based on the information available on the page.”

EXAMPLE

html2canvas(document.body, {
  onrendered: function(canvas) {
    document.body.appendChild(canvas);
  }
});

html2canvas(document.body, {

onrendered: function(canvas) {

document.body.appendChild(canvas);

}

});

CANVAS TO BACKGROUND IMAGE

I have a slide container (#slideContainer), that holds the active slide for editing and a thumb navigation to switch between slides (.slide.thumb).

var current = $(".slide.thumb.active");

html2canvas($("#slideContainer").get(0), {
  onrendered: function(canvas) {
	  
   var dataURL = canvas.toDataURL();
   current.css({"background" :"url("+dataURL+")", 
                "background-size":"contain", 
                "background-position": "center",
                "background-repeat":"no-repeat"});
  }
});

var current = $(".slide.thumb.active");

html2canvas($("#slideContainer").get(0), {

onrendered: function(canvas) {

var dataURL = canvas.toDataURL();

current.css({"background" :"url("+dataURL+")",

"background-size":"contain",

"background-position": "center",

"background-repeat":"no-repeat"});

}

});

When switching between slides, I am doing a snapshot of the current slideContainer and add it as a new background image to the thumb navigation item for that slide. This is done with canvas.toDataURL() and by embedding the resulting image using a data: url.

Works perfectly. html2canvas has no full css support, so the output will not always match 100%, but its close enough to get a glimpse of what is stored per slide ;)

html2canvas
PhantomJS
CasperJS

Enjoy coding …

24. March 2016

Code snippet manager for GitHub Gists –

“Gisto is a code snippet manager that runs on GitHub Gists and adds additional features such as searching, tagging and sharing gists while including a rich code editor. All your data is stored on GitHub and you can access it from GitHub Gists at any time with changes carrying over to Gisto.”

The application is multi-platform.

Gisto