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Radio Group: Update coding of current examples to use APG coding practices #1878

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merged 14 commits into from
Sep 14, 2021
Merged

Radio Group: Update coding of current examples to use APG coding practices #1878

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6388d35
updated coding practices for current radio groups
jongund Apr 24, 2021
8b036b9
update CSS to use SVG graphics in the CSS to simplify the CSS
jongund Apr 26, 2021
287f90e
updated documentation
jongund Apr 26, 2021
93506a4
updated hover styling
jongund Apr 27, 2021
cc8c879
added pointer cursor on hover
jongund Jul 27, 2021
90b3d36
Merge branch 'main' into radio-coding-update
jongund Jul 28, 2021
45c3d0e
updated documentation
jongund Jul 28, 2021
1853783
updated documentation
jongund Jul 28, 2021
2b1997f
fixed bug in high contrast mode and updated SVG documentation on high…
jongund Aug 24, 2021
72897f2
updated documentation and code for radio button examples
jongund Aug 25, 2021
60e3dc9
adjusted strike and fill color for radio buttons
jongund Aug 25, 2021
a78816a
Editorial changes for clarity
mcking65 Aug 28, 2021
fabd891
Editorial changes to high contrast documentation for clarity and grammar
mcking65 Aug 28, 2021
151988c
Change order of items in accessibility features
mcking65 Aug 28, 2021
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72 changes: 12 additions & 60 deletions examples/radio/css/radio.css
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Original file line number Diff line number Diff line change
Expand Up @@ -9,88 +9,40 @@
}

[role="radio"] {
padding: 4px;
padding-left: 30px;
padding-right: 8px;
padding: 4px 8px 4px 8px;
border: 0 solid transparent;
border-radius: 5px;
display: inline-block;
position: relative;
cursor: default;
outline: none;
color: black;
}

[role="radio"] + [role="radio"] {
margin-left: 1em;
}

[role="radio"]::before,
[role="radio"]::after {
position: absolute;
top: 50%;
left: 11px;
transform: translate(-20%, -50%);
content: "";
}

[role="radio"]::before {
width: 14px;
height: 14px;
border: 2px solid hsl(0, 0%, 40%);
border-radius: 100%;
position: relative;
top: 1px;
content: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' height='14' width='14' style='forced-color-adjust: auto;'%3E%3Ccircle cx='7' cy='7' r='6' stroke='rgb(0,90,156)' stroke-width='2' fill-opacity='0' /%3E%3C/svg%3E");
}

[role="radio"][aria-checked="true"]::before {
border-color: hsl(216, 80%, 50%);
background: hsl(217, 95%, 68%);
background-image: linear-gradient(
to bottom,
hsl(217, 95%, 68%),
hsl(216, 80%, 57%)
);
}

[role="radio"][aria-checked="true"]::after {
display: block;
border: 4px solid #fff;
border-radius: 100%;
transform: translate(20%, -50%);
}

[role="radio"][aria-checked="true"]:active::before {
background-image: linear-gradient(
to bottom,
hsl(216, 80%, 57%),
hsl(217, 95%, 68%) 60%
);
}

[role="radio"]:hover::before {
border-color: hsl(216, 94%, 65%);
position: relative;
top: 1px;
content: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' height='14' width='14' style='forced-color-adjust: auto;'%3E%3Ccircle cx='7' cy='7' r='6' stroke='rgb(0,90,156)' stroke-width='2' fill-opacity='0' /%3E%3Ccircle cx='7' cy='7' r='3' fill='rgb(0,90,156)' stroke-opacity='0' /%3E%3C/svg%3E");
}

[role="radio"].focus {
padding: 2px;
padding-left: 28px;
padding-right: 6px;
[role="radio"].focus,
[role="radio"]:hover {
padding: 2px 6px 2px 6px;
border: 2px solid hsl(216, 94%, 73%);
background-color: hsl(216, 80%, 97%);
}

[role="radio"]:hover {
padding: 2px;
padding-left: 28px;
padding-right: 6px;
border: 2px solid hsl(216, 94%, 73%);
background-color: hsl(216, 80%, 92%);
}

[role="radio"].focus::before,
[role="radio"]:hover::before {
left: 9px;
}

[role="radio"][aria-checked="true"].focus::after,
[role="radio"][aria-checked="true"]:hover::after {
transform: translate(-6%, -50%);
cursor: pointer;
}
243 changes: 120 additions & 123 deletions examples/radio/js/radio-activedescendant.js
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Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -9,155 +9,152 @@

'use strict';

var RadioGroupActiveDescendant = function (groupNode) {
this.groupNode = groupNode;
class RadioGroupActiveDescendant {
constructor(groupNode) {
this.groupNode = groupNode;

this.radioButtons = [];
this.radioButtons = [];

this.firstRadioButton = null;
this.lastRadioButton = null;
this.firstRadioButton = null;
this.lastRadioButton = null;

this.groupNode.addEventListener('keydown', this.handleKeydown.bind(this));
this.groupNode.addEventListener('focus', this.handleFocus.bind(this));
this.groupNode.addEventListener('blur', this.handleBlur.bind(this));
this.groupNode.addEventListener('keydown', this.handleKeydown.bind(this));
this.groupNode.addEventListener('focus', this.handleFocus.bind(this));
this.groupNode.addEventListener('blur', this.handleBlur.bind(this));

// initialize
if (!this.groupNode.getAttribute('role')) {
this.groupNode.setAttribute('role', 'radiogroup');
}
// initialize
if (!this.groupNode.getAttribute('role')) {
this.groupNode.setAttribute('role', 'radiogroup');
}

var rbs = this.groupNode.querySelectorAll('[role=radio]');
var rbs = this.groupNode.querySelectorAll('[role=radio]');

for (var i = 0; i < rbs.length; i++) {
var rb = rbs[i];
rb.addEventListener('click', this.handleClick.bind(this));
this.radioButtons.push(rb);
if (!this.firstRadioButton) {
this.firstRadioButton = rb;
for (var i = 0; i < rbs.length; i++) {
var rb = rbs[i];
rb.addEventListener('click', this.handleClick.bind(this));
this.radioButtons.push(rb);
if (!this.firstRadioButton) {
this.firstRadioButton = rb;
}
this.lastRadioButton = rb;
}
this.lastRadioButton = rb;
this.groupNode.tabIndex = 0;
}
this.groupNode.tabIndex = 0;
};

RadioGroupActiveDescendant.prototype.setChecked = function (currentItem) {
for (var i = 0; i < this.radioButtons.length; i++) {
var rb = this.radioButtons[i];
rb.setAttribute('aria-checked', 'false');
rb.classList.remove('focus');

setChecked(currentItem) {
for (var i = 0; i < this.radioButtons.length; i++) {
var rb = this.radioButtons[i];
rb.setAttribute('aria-checked', 'false');
rb.classList.remove('focus');
}
currentItem.setAttribute('aria-checked', 'true');
currentItem.classList.add('focus');
this.groupNode.setAttribute('aria-activedescendant', currentItem.id);
this.groupNode.focus();
}
currentItem.setAttribute('aria-checked', 'true');
currentItem.classList.add('focus');
this.groupNode.setAttribute('aria-activedescendant', currentItem.id);
this.groupNode.focus();
};

RadioGroupActiveDescendant.prototype.setCheckedToPreviousItem = function (
currentItem
) {
var index;

if (currentItem === this.firstRadioButton) {
this.setChecked(this.lastRadioButton);
} else {
index = this.radioButtons.indexOf(currentItem);
this.setChecked(this.radioButtons[index - 1]);

setCheckedToPreviousItem(currentItem) {
var index;

if (currentItem === this.firstRadioButton) {
this.setChecked(this.lastRadioButton);
} else {
index = this.radioButtons.indexOf(currentItem);
this.setChecked(this.radioButtons[index - 1]);
}
}
};

RadioGroupActiveDescendant.prototype.setCheckedToNextItem = function (
currentItem
) {
var index;

if (currentItem === this.lastRadioButton) {
this.setChecked(this.firstRadioButton);
} else {
index = this.radioButtons.indexOf(currentItem);
this.setChecked(this.radioButtons[index + 1]);

setCheckedToNextItem(currentItem) {
var index;

if (currentItem === this.lastRadioButton) {
this.setChecked(this.firstRadioButton);
} else {
index = this.radioButtons.indexOf(currentItem);
this.setChecked(this.radioButtons[index + 1]);
}
}
};

RadioGroupActiveDescendant.prototype.getCurrentRadioButton = function () {
var id = this.groupNode.getAttribute('aria-activedescendant');
if (!id) {
getCurrentRadioButton() {
var id = this.groupNode.getAttribute('aria-activedescendant');
if (!id) {
this.groupNode.setAttribute(
'aria-activedescendant',
this.firstRadioButton.id
);
return this.firstRadioButton;
}
for (var i = 0; i < this.radioButtons.length; i++) {
var rb = this.radioButtons[i];
if (rb.id === id) {
return rb;
}
}
this.groupNode.setAttribute(
'aria-activedescendant',
this.firstRadioButton.id
);
return this.firstRadioButton;
}
for (var i = 0; i < this.radioButtons.length; i++) {
var rb = this.radioButtons[i];
if (rb.id === id) {
return rb;

// Event Handlers

handleKeydown(event) {
var flag = false;

var currentItem = this.getCurrentRadioButton();
switch (event.key) {
case ' ':
case 'Enter':
this.setChecked(currentItem);
flag = true;
break;

case 'Up':
case 'ArrowUp':
case 'Left':
case 'ArrowLeft':
this.setCheckedToPreviousItem(currentItem);
flag = true;
break;

case 'Down':
case 'ArrowDown':
case 'Right':
case 'ArrowRight':
this.setCheckedToNextItem(currentItem);
flag = true;
break;

default:
break;
}
}
this.groupNode.setAttribute(
'aria-activedescendant',
this.firstRadioButton.id
);
return this.firstRadioButton;
};

// Event Handlers

RadioGroupActiveDescendant.prototype.handleKeydown = function (event) {
var flag = false;

var currentItem = this.getCurrentRadioButton();
switch (event.key) {
case ' ':
case 'Enter':
this.setChecked(currentItem);
flag = true;
break;

case 'Up':
case 'ArrowUp':
case 'Left':
case 'ArrowLeft':
this.setCheckedToPreviousItem(currentItem);
flag = true;
break;

case 'Down':
case 'ArrowDown':
case 'Right':
case 'ArrowRight':
this.setCheckedToNextItem(currentItem);
flag = true;
break;

default:
break;
}

if (flag) {
event.stopPropagation();
event.preventDefault();
if (flag) {
event.stopPropagation();
event.preventDefault();
}
}
};

RadioGroupActiveDescendant.prototype.handleClick = function (event) {
this.setChecked(event.currentTarget);
};
handleClick(event) {
this.setChecked(event.currentTarget);
}

RadioGroupActiveDescendant.prototype.handleFocus = function () {
var currentItem = this.getCurrentRadioButton();
currentItem.classList.add('focus');
};
handleFocus() {
var currentItem = this.getCurrentRadioButton();
currentItem.classList.add('focus');
}

RadioGroupActiveDescendant.prototype.handleBlur = function () {
var currentItem = this.getCurrentRadioButton();
currentItem.classList.remove('focus');
};
handleBlur() {
var currentItem = this.getCurrentRadioButton();
currentItem.classList.remove('focus');
}
}

// Initialize radio button group using aria-activedescendant

window.addEventListener('load', function () {
var rgs = document.querySelectorAll('.radiogroup-activedescendant');
for (var i = 0; i < rgs.length; i++) {
new RadioGroupActiveDescendant(rgs[i]);
var radios = document.querySelectorAll('.radiogroup-activedescendant');
for (var i = 0; i < radios.length; i++) {
new RadioGroupActiveDescendant(radios[i]);
}
});