mdui
Version:
实现 material you 设计规范的 Web Components 组件库
106 lines (105 loc) • 3.75 kB
JavaScript
import { __decorate } from "tslib";
import { html } from 'lit';
import { customElement, property } from 'lit/decorators.js';
import { booleanConverter } from '@mdui/shared/helpers/decorator.js';
import { componentStyle } from '@mdui/shared/lit-styles/component-style.js';
import { ScrollBehaviorMixin } from '@mdui/shared/mixins/scrollBehavior.js';
import { LayoutItemBase } from '../layout/layout-item-base.js';
import { style } from './style.js';
/**
* @summary 底部应用栏组件
*
* ```html
* <mdui-bottom-app-bar>
* ..<mdui-button-icon icon="check_box--outlined"></mdui-button-icon>
* ..<mdui-button-icon icon="edit--outlined"></mdui-button-icon>
* ..<mdui-button-icon icon="mic_none--outlined"></mdui-button-icon>
* ..<mdui-button-icon icon="image--outlined"></mdui-button-icon>
* ..<div style="flex-grow: 1"></div>
* ..<mdui-fab icon="add"></mdui-fab>
* </mdui-bottom-app-bar>
* ```
*
* @event show - 开始显示时，事件被触发。可以通过调用 `event.preventDefault()` 阻止显示
* @event shown - 显示动画完成时，事件被触发
* @event hide - 开始隐藏时，事件被触发。可以通过调用 `event.preventDefault()` 阻止隐藏
* @event hidden - 隐藏动画完成时，事件被触发
*
* @slot - 底部应用栏内部的元素
*
* @cssprop --shape-corner - 组件的圆角大小。可以指定一个具体的像素值；但更推荐引用[设计令牌](/docs/2/styles/design-tokens#shape-corner)
* @cssprop --z-index - 组件的 CSS `z-index` 值
*/
let BottomAppBar = class BottomAppBar extends ScrollBehaviorMixin(LayoutItemBase) {
constructor() {
super(...arguments);
/**
* 是否隐藏
*/
this.hide = false;
/**
* 是否让底部应用栏中的 [`<mdui-fab>`](/docs/2/components/fab) 组件脱离应用栏。如果为 `true`，则当应用栏隐藏后，[`<mdui-fab>`](/docs/2/components/fab) 仍会停留在页面上
*/
this.fabDetach = false;
}
get scrollPaddingPosition() {
return 'bottom';
}
get layoutPlacement() {
return 'bottom';
}
firstUpdated(_changedProperties) {
super.firstUpdated(_changedProperties);
this.addEventListener('transitionend', (event) => {
if (event.target === this) {
this.emit(this.hide ? 'hidden' : 'shown');
}
});
}
render() {
return html `<slot></slot>`;
}
/**
* 滚动行为
* 当前仅支持 hide 这一个行为，所以不做行为类型判断
*/
runScrollThreshold(isScrollingUp) {
// 向下滚动
if (!isScrollingUp && !this.hide) {
const eventProceeded = this.emit('hide', { cancelable: true });
if (eventProceeded) {
this.hide = true;
}
}
// 向上滚动
if (isScrollingUp && this.hide) {
const eventProceeded = this.emit('show', { cancelable: true });
if (eventProceeded) {
this.hide = false;
}
}
}
};
BottomAppBar.styles = [componentStyle, style];
__decorate([
property({
type: Boolean,
reflect: true,
converter: booleanConverter,
})
], BottomAppBar.prototype, "hide", void 0);
__decorate([
property({
type: Boolean,
reflect: true,
converter: booleanConverter,
attribute: 'fab-detach',
})
], BottomAppBar.prototype, "fabDetach", void 0);
__decorate([
property({ reflect: true, attribute: 'scroll-behavior' })
], BottomAppBar.prototype, "scrollBehavior", void 0);
BottomAppBar = __decorate([
customElement('mdui-bottom-app-bar')
], BottomAppBar);
export { BottomAppBar };