514 lines
15 KiB
Vue
514 lines
15 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="listbox" readonly :disabled="disabled" @focus="onFocus" @blur="onBlur" @keydown="onKeyDown" :tabindex="tabindex"/>
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</div>
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<input v-if="editable" type="text" class="p-dropdown-label p-inputtext" :disabled="disabled" @focus="onFocus" @blur="onBlur" :placeholder="placeholder" :value="editableInputValue" @input="onEditableInput">
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<label v-if="!editable" :class="labelClass">{{label}}</label>
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<i v-if="showClear && value != null" class="p-dropdown-clear-icon pi pi-times" @click="onClearClick"></i>
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<div class="p-dropdown-trigger">
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<span class="p-dropdown-trigger-icon pi pi-chevron-down p-clickable"></span>
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</div>
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<transition name="p-input-overlay" @enter="onOverlayEnter" @leave="onOverlayLeave">
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<div ref="overlay" class="p-dropdown-panel" v-if="overlayVisible">
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<div v-if="filter" class="p-dropdown-filter-container">
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<input type="text" v-model="filterValue" autoComplete="off" class="p-dropdown-filter p-inputtext p-component" :placeholder="filterPlaceholder" @keydown="onFilterKeyDown" />
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<span class="p-dropdown-filter-icon pi pi-search"></span>
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</div>
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<div ref="itemsWrapper" class="p-dropdown-items-wrapper" :style="{'max-height': scrollHeight}">
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<ul class="p-dropdown-items p-dropdown-list p-component">
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<li v-for="(option, i) of visibleOptions" :class="['p-dropdown-item', {'p-highlight': isSelected(option), 'p-disabled': isOptionDisabled(option)}]"
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:aria-label="getOptionLabel(option)" :key="getOptionLabel(option)" @click="onOptionSelect($event, option)">
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<slot name="option" :option="option" :index="i">
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{{getOptionLabel(option)}}
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</slot>
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</li>
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</ul>
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</div>
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</div>
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</transition>
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</div>
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</template>
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<script>
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import ObjectUtils from '../utils/ObjectUtils';
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import DomHandler from '../utils/DomHandler';
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export default {
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props: {
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value: null,
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options: Array,
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optionLabel: null,
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optionValue: null,
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optionDisabled: null,
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scrollHeight: {
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type: String,
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default: '200px'
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},
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filter: Boolean,
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filterPlaceholder: String,
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editable: Boolean,
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placeholder: String,
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disabled: Boolean,
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dataKey: null,
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showClear: Boolean,
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tabindex: String
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},
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data() {
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return {
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focused: false,
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filterValue: null,
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overlayVisible: false
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};
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},
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outsideClickListener: null,
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searchTimeout: null,
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currentSearchChar: null,
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previousSearchChar: null,
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searchValue: null,
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beforeDestroy() {
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this.unbindOutsideClickListener();
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},
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updated() {
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if (this.overlayVisible && this.filterValue) {
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this.alignOverlay();
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}
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},
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methods: {
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getOptionLabel(option) {
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return ObjectUtils.resolveFieldData(option, this.optionLabel);
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},
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getOptionValue(option) {
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return this.optionValue ? ObjectUtils.resolveFieldData(option, this.optionValue) : option;
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},
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isOptionDisabled(option) {
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return this.optionDisabled ? ObjectUtils.resolveFieldData(option, this.optionDisabled) : false;
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},
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getSelectedOption() {
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let selectedOption;
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if (this.value != null && this.options) {
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for (let option of this.options) {
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if ((ObjectUtils.equals(this.value, this.getOptionValue(option), this.dataKey))) {
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selectedOption = option;
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break;
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}
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}
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}
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return selectedOption;
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},
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isSelected(option) {
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return ObjectUtils.equals(this.value, this.getOptionValue(option), this.dataKey);
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},
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getSelectedOptionIndex() {
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let selectedOptionIndex = -1;
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if (this.value != null && this.visibleOptions) {
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for (let i = 0; i < this.visibleOptions.length; i++) {
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if ((ObjectUtils.equals(this.value, this.getOptionValue(this.visibleOptions[i]), this.dataKey))) {
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selectedOptionIndex = i;
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break;
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}
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}
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}
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return selectedOptionIndex;
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},
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onFocus() {
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this.focused = true;
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},
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onBlur() {
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this.focused = false;
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},
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onKeyDown(event) {
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switch(event.which) {
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//down
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case 40:
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this.onDownKey(event);
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break;
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//up
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case 38:
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this.onUpKey(event);
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break;
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//space
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case 32:
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if (!this.overlayVisible) {
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this.overlayVisible = true;
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event.preventDefault();
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}
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break;
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//enter and escape
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case 13:
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case 27:
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if (this.overlayVisible) {
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this.overlayVisible = false;
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event.preventDefault();
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}
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break;
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//tab
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case 9:
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this.overlayVisible = false;
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break;
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default:
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this.search(event);
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break;
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}
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},
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onFilterKeyDown(event) {
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switch (event.which) {
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//down
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case 40:
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this.onDownKey(event);
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break;
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//up
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case 38:
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this.onUpKey(event);
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break;
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//enter and escape
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case 13:
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case 27:
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this.overlayVisible = false;
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event.preventDefault();
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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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onDownKey(event) {
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if (this.visibleOptions) {
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if (!this.overlayVisible && event.altKey) {
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this.overlayVisible = true;
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}
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else {
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let nextOption = this.findNextOption(this.getSelectedOptionIndex());
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if (nextOption) {
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this.updateModel(event, this.getOptionValue(nextOption));
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}
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}
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}
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event.preventDefault();
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},
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onUpKey(event) {
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if (this.visibleOptions) {
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let prevOption = this.findPrevOption(this.getSelectedOptionIndex());
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if (prevOption) {
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this.updateModel(event, this.getOptionValue(prevOption));
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}
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}
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event.preventDefault();
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},
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findNextOption(index) {
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let i = index + 1;
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if (i === this.visibleOptions.length) {
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return null;
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}
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let option = this.visibleOptions[i];
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if (this.isOptionDisabled(option))
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return this.findNextOption(i);
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else
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return option;
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},
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findPrevOption(index) {
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let i = index - 1;
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if (i < 0) {
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return null;
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}
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let option = this.visibleOptions[i];
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if (this.isOptionDisabled(option))
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return this.findPrevOption(i);
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else
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return option;
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},
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onClearClick() {
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this.updateModel(event, null);
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},
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onClick(event) {
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if (DomHandler.hasClass(event.target, 'p-dropdown-clear-icon')) {
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return;
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}
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else if (!this.$refs.overlay || !this.$refs.overlay.contains(event.target)) {
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this.overlayVisible = !this.overlayVisible;
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this.$refs.focusInput.focus();
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}
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},
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onOptionSelect(event, option) {
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let value = this.getOptionValue(option);
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this.updateModel(event, value);
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this.$refs.focusInput.focus();
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setTimeout(() => {
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this.overlayVisible = false;
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}, 100);
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},
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onEditableInput(event) {
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this.$emit('input', event.target.value);
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},
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onOverlayEnter() {
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this.alignOverlay();
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this.bindOutsideClickListener();
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},
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onOverlayLeave() {
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this.unbindOutsideClickListener();
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},
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alignOverlay() {
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DomHandler.relativePosition(this.$refs.overlay, this.$refs.container);
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},
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updateModel(event, value) {
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this.$emit('input', value);
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this.$emit('change', {originalEvent: event, value: value});
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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.$refs.overlay && !this.$refs.container.contains(event.target)) {
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this.overlayVisible = false;
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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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search(event) {
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if (!this.visibleOptions) {
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return;
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}
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if (this.searchTimeout) {
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clearTimeout(this.searchTimeout);
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}
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const char = String.fromCharCode(event.keyCode);
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this.previousSearchChar = this.currentSearchChar;
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this.currentSearchChar = char;
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if (this.previousSearchChar === this.currentSearchChar)
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this.searchValue = this.currentSearchChar;
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else
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this.searchValue = this.searchValue ? this.searchValue + char : char;
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let searchIndex = this.getSelectedOptionIndex();
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let newOption = this.searchOption(++searchIndex);
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if (newOption) {
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this.updateModel(event, this.getOptionValue(newOption));
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}
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this.searchTimeout = setTimeout(() => {
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this.searchValue = null;
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}, 250);
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},
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searchOption(index) {
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let option;
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if (this.searchValue) {
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option = this.searchOptionInRange(index, this.visibleOptions.length);
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if (!option) {
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option = this.searchOptionInRange(0, index);
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}
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}
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return option;
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},
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searchOptionInRange(start, end) {
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for (let i = start; i < end; i++) {
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let opt = this.visibleOptions[i];
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let label = this.getOptionLabel(opt).toLowerCase();
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if (label.startsWith(this.searchValue.toLowerCase())) {
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return opt;
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}
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}
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return null;
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}
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},
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computed: {
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visibleOptions() {
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if (this.filterValue && this.filterValue.trim().length > 0)
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return this.options.filter(option => this.getOptionLabel(option).toLowerCase().indexOf(this.filterValue.toLowerCase()) > -1);
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else
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return this.options;
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},
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containerClass() {
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return [
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'p-dropdown p-component p-unselectable-text',
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{
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'p-disabled': this.disabled,
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'p-dropdown-clearable': this.showClear && !this.disabled,
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'p-focus': this.focused
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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-dropdown-label p-inputtext',
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{
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'p-placeholder': this.label === null && this.placeholder,
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'p-dropdown-label-empty': (this.label == null || this.label.length === 0)
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}
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];
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},
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label() {
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let selectedOption = this.getSelectedOption();
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if (selectedOption)
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return this.getOptionLabel(selectedOption);
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else
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return this.placeholder||'p-dropdown';
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},
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editableInputValue() {
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let selectedOption = this.getSelectedOption();
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if (selectedOption)
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return this.getOptionLabel(selectedOption);
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else
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return this.value;
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}
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}
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}
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</script>
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<style>
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.p-dropdown {
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display: inline-block;
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position: relative;
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cursor: pointer;
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vertical-align: middle;
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}
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.p-dropdown .p-dropdown-clear-icon {
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position: absolute;
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right: 2em;
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top: 50%;
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font-size: 1em;
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height: 1em;
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margin-top: -.5em;
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}
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.p-dropdown .p-dropdown-trigger {
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border-right: none;
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border-top: none;
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border-bottom: none;
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cursor: pointer;
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width: 1.5em;
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height: 100%;
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position: absolute;
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right: 0;
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top: 0;
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padding: 0 .25em;
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}
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.p-dropdown .p-dropdown-trigger .p-dropdown-trigger-icon {
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top: 50%;
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left: 50%;
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margin-top: -.5em;
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margin-left: -.5em;
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position: absolute;
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}
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.p-dropdown .p-dropdown-label {
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display: block;
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border: none;
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white-space: nowrap;
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overflow: hidden;
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font-weight: normal;
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width: 100%;
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padding-right: 1.5em;
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}
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.p-dropdown .p-dropdown-item-empty,
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.p-dropdown .p-dropdown-label-empty {
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overflow: hidden;
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visibility: hidden;
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}
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.p-dropdown.p-disabled .p-dropdown-trigger,
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.p-dropdown.p-disabled .p-dropdown-label {
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cursor: default;
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}
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.p-dropdown label.p-dropdown-label {
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cursor: pointer;
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}
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.p-dropdown input.p-dropdown-label {
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cursor: default;
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}
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.p-dropdown .p-dropdown-panel {
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min-width: 100%;
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z-index: 1;
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}
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.p-dropdown-panel {
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position: absolute;
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height: auto;
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}
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.p-dropdown-panel .p-dropdown-items-wrapper {
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overflow: auto;
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}
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.p-dropdown-panel .p-dropdown-item {
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font-weight: normal;
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border: 0 none;
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cursor: pointer;
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margin: 1px 0;
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padding: .125em .25em;
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text-align: left;
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}
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.p-dropdown-panel .p-dropdown-item-group {
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font-weight: bold;
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}
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.p-dropdown-panel .p-dropdown-list {
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padding: 0.4em;
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border: 0 none;
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margin: 0;
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list-style-type: none;
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}
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.p-dropdown-panel .p-dropdown-filter {
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width: 100%;
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box-sizing: border-box;
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padding-right: 1.5em;
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}
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.p-dropdown-panel .p-dropdown-filter-container {
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position: relative;
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margin: 0;
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padding: 0.4em;
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display: inline-block;
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}
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.p-dropdown-panel .p-dropdown-filter-container .p-dropdown-filter-icon {
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position: absolute;
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top: .8em;
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right: 1em;
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}
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/** Dropdown **/
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.p-fluid .p-dropdown {
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width: 100%;
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}
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</style> |