512 lines
16 KiB
Vue
512 lines
16 KiB
Vue
<template>
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<div ref="container" :class="containerClass" @click="onClick">
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<div class="p-hidden-accessible">
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<input ref="focusInput" type="text" role="combobox" :id="inputId" :class="inputClass" :style="inputStyle" readonly :disabled="disabled" :tabindex="!disabled ? tabindex : -1"
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:aria-labelledby="ariaLabelledby" :aria-label="ariaLabel" aria-haspopup="tree" :aria-expanded="overlayVisible" :aria-controls="listId"
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@focus="onFocus($event)" @blur="onBlur($event)" @keydown="onKeyDown($event)" v-bind="inputProps" />
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</div>
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<div class="p-treeselect-label-container">
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<div :class="labelClass">
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<slot name="value" :value="selectedNodes" :placeholder="placeholder">
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<template v-if="display === 'comma'">
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{{label || 'empty'}}
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</template>
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<template v-else-if="display === 'chip'">
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<div v-for="node of selectedNodes" class="p-treeselect-token" :key="node.key">
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<span class="p-treeselect-token-label">{{node.label}}</span>
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</div>
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<template v-if="emptyValue">{{placeholder || 'empty'}}</template>
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</template>
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</slot>
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</div>
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</div>
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<div class="p-treeselect-trigger" role="button" aria-haspopup="tree" :aria-expanded="overlayVisible">
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<slot name="indicator">
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<span class="p-treeselect-trigger-icon pi pi-chevron-down"></span>
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</slot>
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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" v-if="overlayVisible" @click="onOverlayClick" :class="panelStyleClass" v-bind="panelProps">
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<slot name="header" :value="modelValue" :options="options"></slot>
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<div class="p-treeselect-items-wrapper" :style="{'max-height': scrollHeight}">
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<TSTree :id="listId" :value="options" :selectionMode="selectionMode" @update:selectionKeys="onSelectionChange" :selectionKeys="modelValue"
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:expandedKeys="expandedKeys" @update:expandedKeys="onNodeToggle" :metaKeySelection="metaKeySelection"
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@node-expand="$emit('node-expand', $event)" @node-collapse="$emit('node-collapse', $event)"
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@node-select="onNodeSelect" @node-unselect="onNodeUnselect" :level="0" />
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<div v-if="emptyOptions" class="p-treeselect-empty-message">
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<slot name="empty">{{emptyMessageText}}</slot>
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</div>
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</div>
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<slot name="footer" :value="modelValue" :options="options"></slot>
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</div>
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</transition>
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</Portal>
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</div>
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</template>
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<script>
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import {ConnectedOverlayScrollHandler,DomHandler,ZIndexUtils,UniqueComponentId} from 'primevue/utils';
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import OverlayEventBus from 'primevue/overlayeventbus';
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import Tree from 'primevue/tree';
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import Ripple from 'primevue/ripple';
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import Portal from 'primevue/portal';
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export default {
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name: 'TreeSelect',
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emits: ['update:modelValue', 'before-show', 'before-hide', 'change', 'show', 'hide', 'node-select', 'node-unselect', 'node-expand', 'node-collapse', 'focus', 'blur'],
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props: {
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modelValue: null,
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options: Array,
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scrollHeight: {
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type: String,
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default: '400px'
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},
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placeholder: String,
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disabled: Boolean,
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tabindex: String,
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selectionMode: {
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type: String,
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default: 'single'
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},
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panelClass: {
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type: String,
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default: null
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},
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panelProps: null,
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appendTo: {
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type: String,
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default: 'body'
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},
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emptyMessage: {
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type: String,
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default: null
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},
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display: {
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type: String,
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default: 'comma'
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},
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metaKeySelection: {
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type: Boolean,
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default: true
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},
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inputId: String,
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inputClass: String,
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inputStyle: null,
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inputProps: null,
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'aria-labelledby': {
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type: String,
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default: null
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},
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'aria-label': {
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type: String,
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default: null
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}
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},
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watch: {
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modelValue: {
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handler: function() {
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if (!this.selfChange) {
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this.updateTreeState();
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}
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this.selfChange = false;
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},
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immediate: true
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},
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options() {
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this.updateTreeState();
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}
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},
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data() {
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return {
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focused: false,
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overlayVisible: false,
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expandedKeys: {}
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};
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},
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outsideClickListener: null,
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resizeListener: null,
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scrollHandler: null,
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overlay: null,
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selfChange: false,
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beforeUnmount() {
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this.unbindOutsideClickListener();
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this.unbindResizeListener();
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if (this.scrollHandler) {
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this.scrollHandler.destroy();
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this.scrollHandler = null;
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}
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if (this.overlay) {
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ZIndexUtils.clear(this.overlay);
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this.overlay = null;
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}
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},
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mounted() {
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this.updateTreeState();
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},
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methods: {
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show() {
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this.$emit('before-show');
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this.overlayVisible = true;
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},
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hide() {
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this.$emit('before-hide');
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this.overlayVisible = false;
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this.$refs.focusInput.focus();
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},
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onFocus(event) {
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this.focused = true;
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this.$emit('focus', event);
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},
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onBlur(event) {
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this.focused = false;
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this.$emit('blur', event);
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},
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onClick(event) {
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if (!this.disabled && (!this.overlay || !this.overlay.contains(event.target)) && !DomHandler.hasClass(event.target, 'p-treeselect-close')) {
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if (this.overlayVisible)
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this.hide();
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else
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this.show();
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this.$refs.focusInput.focus();
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}
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},
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onSelectionChange(keys) {
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this.selfChange = true;
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this.$emit('update:modelValue', keys);
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this.$emit('change', keys);
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},
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onNodeSelect(node) {
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this.$emit('node-select', node);
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if (this.selectionMode === 'single') {
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this.hide();
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}
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},
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onNodeUnselect(node) {
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this.$emit('node-unselect', node);
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},
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onNodeToggle(keys) {
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this.expandedKeys = keys;
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},
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onKeyDown(event) {
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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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if (DomHandler.findSingle(this.overlay, '.p-highlight')) {
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DomHandler.findSingle(this.overlay, '.p-highlight').focus();
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}
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else DomHandler.findSingle(this.overlay, '.p-treenode').children[0].focus();
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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 'Space':
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case 'Enter':
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if (this.overlayVisible) {
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this.hide();
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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 'Escape':
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case 'Tab':
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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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break;
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default:
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break;
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}
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},
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onOverlayEnter(el) {
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ZIndexUtils.set('overlay', el, this.$primevue.config.zIndex.overlay);
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this.alignOverlay();
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this.bindOutsideClickListener();
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this.bindScrollListener();
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this.bindResizeListener();
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this.scrollValueInView();
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this.$emit('show');
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},
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onOverlayLeave() {
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this.unbindOutsideClickListener();
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this.unbindScrollListener();
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this.unbindResizeListener();
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this.$emit('hide');
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this.overlay = null;
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},
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onOverlayAfterLeave(el) {
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ZIndexUtils.clear(el);
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},
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alignOverlay() {
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if (this.appendTo === 'self') {
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DomHandler.relativePosition(this.overlay, this.$el);
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}
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else {
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this.overlay.style.minWidth = DomHandler.getOuterWidth(this.$el) + 'px';
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DomHandler.absolutePosition(this.overlay, this.$el);
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}
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},
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bindOutsideClickListener() {
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if (!this.outsideClickListener) {
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this.outsideClickListener = (event) => {
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if (this.overlayVisible && this.isOutsideClicked(event)) {
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this.hide();
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}
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};
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document.addEventListener('click', this.outsideClickListener);
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}
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},
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unbindOutsideClickListener() {
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if (this.outsideClickListener) {
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document.removeEventListener('click', this.outsideClickListener);
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this.outsideClickListener = null;
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}
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},
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bindScrollListener() {
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if (!this.scrollHandler) {
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this.scrollHandler = new ConnectedOverlayScrollHandler(this.$refs.container, () => {
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if (this.overlayVisible) {
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this.hide();
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}
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});
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}
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this.scrollHandler.bindScrollListener();
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},
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unbindScrollListener() {
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if (this.scrollHandler) {
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this.scrollHandler.unbindScrollListener();
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}
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},
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bindResizeListener() {
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if (!this.resizeListener) {
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this.resizeListener = () => {
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if (this.overlayVisible && !DomHandler.isTouchDevice()) {
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this.hide();
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}
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};
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window.addEventListener('resize', this.resizeListener);
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}
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},
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unbindResizeListener() {
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if (this.resizeListener) {
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window.removeEventListener('resize', this.resizeListener);
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this.resizeListener = null;
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}
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},
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isOutsideClicked(event) {
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return !(this.$el.isSameNode(event.target) || this.$el.contains(event.target) || (this.overlay && this.overlay.contains(event.target)));
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},
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overlayRef(el) {
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this.overlay = el;
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},
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onOverlayClick(event) {
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OverlayEventBus.emit('overlay-click', {
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originalEvent: event,
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target: this.$el
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});
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},
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findSelectedNodes(node, keys, selectedNodes) {
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if (node) {
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if (this.isSelected(node, keys)) {
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selectedNodes.push(node);
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delete keys[node.key];
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}
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if (Object.keys(keys).length && node.children) {
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for (let childNode of node.children) {
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this.findSelectedNodes(childNode, keys, selectedNodes);
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}
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}
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}
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else {
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for (let childNode of this.options) {
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this.findSelectedNodes(childNode, keys, selectedNodes);
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}
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}
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},
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isSelected(node, keys) {
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return this.selectionMode === 'checkbox' ? keys[node.key] && keys[node.key].checked : keys[node.key];
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},
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updateTreeState() {
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let keys = {...this.modelValue};
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this.expandedKeys = {};
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if (keys && this.options) {
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this.updateTreeBranchState(null, null, keys);
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}
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},
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updateTreeBranchState(node, path, keys) {
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if (node) {
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if (this.isSelected(node, keys)) {
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this.expandPath(path);
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delete keys[node.key];
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}
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if (Object.keys(keys).length && node.children) {
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for (let childNode of node.children) {
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path.push(node.key);
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this.updateTreeBranchState(childNode, path, keys);
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}
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}
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}
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else {
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for (let childNode of this.options) {
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this.updateTreeBranchState(childNode, [], keys);
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}
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}
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},
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expandPath(path) {
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if (path.length > 0) {
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for (let key of path) {
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this.expandedKeys[key] = true;
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}
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}
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},
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scrollValueInView() {
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if (this.overlay) {
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let selectedItem = DomHandler.findSingle(this.overlay, 'li.p-highlight');
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if (selectedItem) {
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selectedItem.scrollIntoView({ block: 'nearest', inline: 'start' });
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}
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}
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}
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},
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computed: {
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containerClass() {
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return [
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'p-treeselect p-component p-inputwrapper',
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{
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'p-treeselect-chip': this.display === 'chip',
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'p-disabled': this.disabled,
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'p-focus': this.focused,
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'p-inputwrapper-filled': !this.emptyValue,
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'p-inputwrapper-focus': this.focused || this.overlayVisible
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}
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];
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},
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labelClass() {
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return [
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'p-treeselect-label',
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{
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'p-placeholder': this.label === this.placeholder,
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'p-treeselect-label-empty': !this.placeholder && this.emptyValue
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}
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];
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},
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panelStyleClass() {
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return ['p-treeselect-panel p-component', this.panelClass, {
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'p-input-filled': this.$primevue.config.inputStyle === 'filled',
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'p-ripple-disabled': this.$primevue.config.ripple === false
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}];
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},
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selectedNodes() {
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let selectedNodes = [];
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if (this.modelValue && this.options) {
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let keys = {...this.modelValue};
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this.findSelectedNodes(null, keys, selectedNodes);
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}
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return selectedNodes;
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},
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label() {
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let value = this.selectedNodes;
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return value.length ? value.map(node => node.label).join(', '): this.placeholder;
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},
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emptyMessageText() {
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return this.emptyMessage || this.$primevue.config.locale.emptyMessage;
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},
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emptyValue() {
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return !this.modelValue || Object.keys(this.modelValue).length === 0;
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},
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emptyOptions() {
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return !this.options || this.options.length === 0;
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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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'TSTree': Tree,
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'Portal': Portal
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},
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directives: {
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'ripple': Ripple
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}
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}
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</script>
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<style>
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.p-treeselect {
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display: inline-flex;
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cursor: pointer;
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position: relative;
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user-select: none;
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}
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.p-treeselect-trigger {
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display: flex;
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align-items: center;
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justify-content: center;
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flex-shrink: 0;
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}
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.p-treeselect-label-container {
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overflow: hidden;
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flex: 1 1 auto;
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cursor: pointer;
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}
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.p-treeselect-label {
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display: block;
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white-space: nowrap;
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cursor: pointer;
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overflow: hidden;
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text-overflow: ellipsis;
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}
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.p-treeselect-label-empty {
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overflow: hidden;
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visibility: hidden;
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}
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.p-treeselect-token {
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cursor: default;
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display: inline-flex;
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align-items: center;
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flex: 0 0 auto;
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}
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.p-treeselect .p-treeselect-panel {
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min-width: 100%;
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}
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.p-treeselect-panel {
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position: absolute;
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top: 0;
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left: 0;
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}
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.p-treeselect-items-wrapper {
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overflow: auto;
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}
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.p-fluid .p-treeselect {
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display: flex;
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}
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</style>
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