Accessibility for CascadeSelect
Tuğçe Küçükoğlu
parent
638d132c21
commit
35556009ca
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@ -1,8 +1,8 @@
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<template>
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<div ref="container" :class="containerClass" @click="onClick($event)">
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<div class="p-hidden-accessible">
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<input ref="focusInput" type="text" :id="inputId" readonly :disabled="disabled" @focus="onFocus" @blur="onBlur" @keydown="onKeyDown" :tabindex="tabindex"
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aria-haspopup="listbox" :aria-expanded="overlayVisible" :aria-labelledby="ariaLabelledBy" />
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<input ref="focusInput" role="combobox" type="text" :id="inputId" readonly :disabled="disabled" @focus="onFocus" @blur="onBlur" @keydown="onKeyDown" :tabindex="tabindex"
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aria-haspopup="listbox" :aria-expanded="overlayVisible" :aria-labelledby="ariaLabelledBy" :aria-controls="listId" v-bind="inputProps" />
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</div>
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<span :class="labelClass">
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<slot name="value" :value="modelValue" :placeholder="placeholder">
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@ -16,9 +16,9 @@
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</div>
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<Portal :appendTo="appendTo">
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<transition name="p-connected-overlay" @enter="onOverlayEnter" @leave="onOverlayLeave" @after-leave="onOverlayAfterLeave">
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<div :ref="overlayRef" :class="panelStyleClass" v-if="overlayVisible" @click="onOverlayClick">
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<div :ref="overlayRef" :class="panelStyleClass" v-if="overlayVisible" @click="onOverlayClick" role="group">
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<div class="p-cascadeselect-items-wrapper">
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<CascadeSelectSub :options="options" :selectionPath="selectionPath"
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<CascadeSelectSub :id="listId" role="tree" :options="options" :selectionPath="selectionPath"
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:optionLabel="optionLabel" :optionValue="optionValue" :level="0" :templates="$slots"
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:optionGroupLabel="optionGroupLabel" :optionGroupChildren="optionGroupChildren"
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@option-select="onOptionSelect" @optiongroup-select="onOptionGroupSelect" :dirty="dirty" :root="true" />
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@ -30,7 +30,7 @@
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</template>
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<script>
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import {ConnectedOverlayScrollHandler,ObjectUtils,DomHandler,ZIndexUtils} from 'primevue/utils';
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import {ConnectedOverlayScrollHandler,ObjectUtils,DomHandler,ZIndexUtils,UniqueComponentId} from 'primevue/utils';
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import OverlayEventBus from 'primevue/overlayeventbus';
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import CascadeSelectSub from './CascadeSelectSub.vue';
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import Portal from 'primevue/portal';
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@ -71,7 +71,8 @@ export default {
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loadingIcon: {
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type: String,
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default: 'pi pi-spinner pi-spin'
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}
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},
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inputProps: null
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},
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outsideClickListener: null,
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scrollHandler: null,
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@ -260,7 +261,12 @@ export default {
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this.overlay = el;
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},
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onKeyDown(event) {
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switch(event.key) {
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if (this.disabled || this.loading) {
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event.preventDefault();
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return;
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}
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switch(event.code) {
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case 'Down':
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case 'ArrowDown':
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if (this.overlayVisible) {
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@ -272,11 +278,14 @@ export default {
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event.preventDefault();
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break;
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case 'Escape':
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case 'Space':
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if (this.overlayVisible) {
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this.hide();
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event.preventDefault();
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}
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else {
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this.show();
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}
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event.preventDefault();
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break;
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case 'Tab':
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@ -326,6 +335,9 @@ export default {
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},
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dropdownIconClass() {
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return ['p-cascadeselect-trigger-icon', this.loading ? this.loadingIcon : 'pi pi-chevron-down'];
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},
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listId() {
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return UniqueComponentId() + '_list';
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}
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},
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components: {
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@ -1,8 +1,9 @@
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<template>
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<ul class="p-cascadeselect-panel p-cascadeselect-items" role="listbox" aria-orientation="horizontal">
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<template v-for="(option,i) of options" :key="getOptionLabelToRender(option)">
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<li :class="getItemClass(option)" role="none">
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<div class="p-cascadeselect-item-content" @click="onOptionClick($event, option)" tabindex="0" @keydown="onKeyDown($event, option, i)" v-ripple>
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<ul class="p-cascadeselect-panel p-cascadeselect-items" aria-orientation="horizontal">
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<template v-for="(option,index) of options" :key="getOptionLabelToRender(option)">
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<li :class="getItemClass(option)" role="treeitem" :aria-label="getOptionLabelToRender(option)" :aria-selected="isOptionActive(option)" :aria-expanded="isOptionActive(option)"
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:aria-setsize="options.length" :aria-posinset="index + 1" :aria-level="level + 1">
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<div class="p-cascadeselect-item-content" @click="onOptionClick($event, option)" tabindex="0" @keydown="onKeyDown($event, option, index)" v-ripple>
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<component :is="templates['option']" :option="option" v-if="templates['option']"/>
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<template v-else>
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<span class="p-cascadeselect-item-text">{{getOptionLabelToRender(option)}}</span>
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@ -11,7 +12,7 @@
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</div>
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<CascadeSelectSub v-if="isOptionGroup(option) && isOptionActive(option)" class="p-cascadeselect-sublist" :selectionPath="selectionPath" :options="getOptionGroupChildren(option)"
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:optionLabel="optionLabel" :optionValue="optionValue" :level="level + 1" @option-select="onOptionSelect" @optiongroup-select="onOptionGroupSelect"
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:optionGroupLabel="optionGroupLabel" :optionGroupChildren="optionGroupChildren" :parentActive="isOptionActive(option)" :dirty="dirty" :templates="templates"/>
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:optionGroupLabel="optionGroupLabel" :optionGroupChildren="optionGroupChildren" :parentActive="isOptionActive(option)" :dirty="dirty" :templates="templates" :aria-level="level + 2"/>
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</li>
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</template>
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</ul>
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@ -117,7 +118,7 @@ export default {
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return this.activeOption === option;
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},
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onKeyDown(event, option, index) {
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switch (event.key) {
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switch (event.code) {
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case 'Down':
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case 'ArrowDown':
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var nextItem = this.$el.children[index + 1];
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@ -157,6 +158,7 @@ export default {
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break;
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case 'Enter':
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case 'Space':
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this.onOptionClick(event, option);
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break;
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}
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@ -3,7 +3,7 @@
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<div class="content-section introduction">
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<div class="feature-intro">
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<h1>CascadeSelect</h1>
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<p>CascadeSelect displays a nested structure of options.</p>
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<p>CascadeSelect is a form component to select a value from a nested structure of options.</p>
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</div>
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<AppDemoActions />
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</div>
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@ -25,7 +25,6 @@ import CascadeSelect from 'primevue/cascadeselect';
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</code></pre>
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<pre v-code.script><code>
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data() {
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data() {
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return {
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selectedCity: null,
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@ -106,7 +105,6 @@ data() {
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}
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]
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}
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}
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}
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</code></pre>
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@ -360,6 +358,101 @@ data() {
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</table>
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</div>
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<h5>Accessibility</h5>
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<DevelopmentSection>
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<h6>Screen Reader</h6>
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<p>Value to describe the component can either be provided with <i>aria-labelledby</i> or <i>aria-label</i> props. The cascadeselect element has a <i>combobox</i> role
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in addition to <i>aria-haspopup</i> and <i>aria-expanded</i> attributes. The relation between the combobox and the popup is created with <i>aria-controls</i> that refers to the id of the popup.</p>
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<p>The popup list has an id that refers to the <i>aria-controls</i> attribute of the <i>combobox</i> element and uses <i>tree</i> as the role. Each list item has a <i>treeitem</i> role along with <i>aria-label</i>, <i>aria-selected</i> and <i>aria-expanded</i> attributes. The container
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element of a treenode has the <i>group</i> role. The <i>aria-setsize</i>, <i>aria-posinset</i> and <i>aria-level</i> attributes are calculated implicitly and added to each treeitem.</p>
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<p>If filtering is enabled, <i>filterInputProps</i> can be defined to give <i>aria-*</i> props to the filter input element.</p>
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<pre v-code><code>
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<span id="dd1">Options</span>
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<CascadeSelect aria-labelledby="dd1" />
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<CascadeSelect aria-label="Options" />
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</code></pre>
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<h6>Closed State Keyboard Support</h6>
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<div class="doc-tablewrapper">
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<table class="doc-table">
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<thead>
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<tr>
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<th>Key</th>
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<th>Function</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><i>tab</i></td>
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<td>Moves focus to the cascadeselect element.</td>
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</tr>
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<tr>
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<td><i>space</i></td>
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<td>Opens the popup and moves visual focus to the selected option, if there is none then first option receives the focus.</td>
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</tr>
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<tr>
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<td><i>down arrow</i></td>
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<td>Opens the popup and moves visual focus to the selected option, if there is none then first option receives the focus.</td>
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</tr>
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</tbody>
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</table>
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</div>
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<h6>Popup Keyboard Support</h6>
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<div class="doc-tablewrapper">
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<table class="doc-table">
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<thead>
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<tr>
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<th>Key</th>
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<th>Function</th>
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</tr>
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</thead>
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<tbody>
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<tr>
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<td><i>tab</i></td>
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<td>Hides the popup and moves focus to the next tabbable element.</td>
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</tr>
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<tr>
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<td><i>tab</i></td>
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<td>Hides the popup and moves focus to the previous tabbable element.</td>
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</tr>
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<tr>
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<td><i>enter</i></td>
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<td>Selects the focused option and closes the popup.</td>
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</tr>
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<tr>
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<td><i>space</i></td>
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<td>Selects the focused option and closes the popup.</td>
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</tr>
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<tr>
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<td><i>escape</i></td>
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<td>Closes the popup, moves focus to the cascadeselect element.</td>
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</tr>
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<tr>
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<td><i>down arrow</i></td>
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<td>Moves focus to the next option.</td>
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</tr>
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<tr>
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<td><i>up arrow</i></td>
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<td>Moves focus to the previous option.</td>
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</tr>
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<tr>
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<td><i>right arrow</i></td>
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<td>If option is closed, opens the option otherwise moves focus to the first child option.</td>
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</tr>
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<tr>
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<td><i>left arrow</i></td>
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<td>If option is open, closes the option otherwise moves focus to the parent option.</td>
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</tr>
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</tbody>
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</table>
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</div>
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</DevelopmentSection>
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<h5>Dependencies</h5>
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<p>None.</p>
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</AppDoc>
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