devextreme
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HTML5 JavaScript Component Suite for Responsive Web Development
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JavaScript
/**
* DevExtreme (esm/ui/date_box/ui.date_view_roller.js)
* Version: 21.2.4
* Build date: Mon Dec 06 2021
*
* Copyright (c) 2012 - 2021 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
import {
getHeight
} from "../../core/utils/size";
import $ from "../../core/renderer";
import eventsEngine from "../../events/core/events_engine";
import registerComponent from "../../core/component_registrator";
import {
extend
} from "../../core/utils/extend";
import {
each
} from "../../core/utils/iterator";
import {
addNamespace
} from "../../events/utils/index";
import {
name as clickEventName
} from "../../events/click";
import Scrollable from "../scroll_view/ui.scrollable";
import devices from "../../core/devices";
import fx from "../../animation/fx";
import {
resetPosition
} from "../../animation/translator";
import {
convertToLocation
} from "../../renovation/ui/scroll_view/utils/convert_location";
var DATEVIEW_ROLLER_CLASS = "dx-dateviewroller";
var DATEVIEW_ROLLER_ACTIVE_CLASS = "dx-state-active";
var DATEVIEW_ROLLER_CURRENT_CLASS = "dx-dateviewroller-current";
var DATEVIEW_ROLLER_ITEM_CLASS = "dx-dateview-item";
var DATEVIEW_ROLLER_ITEM_SELECTED_CLASS = "dx-dateview-item-selected";
var DATEVIEW_ROLLER_ITEM_SELECTED_FRAME_CLASS = "dx-dateview-item-selected-frame";
var DATEVIEW_ROLLER_ITEM_SELECTED_BORDER_CLASS = "dx-dateview-item-selected-border";
class DateViewRoller extends Scrollable {
_getDefaultOptions() {
return extend(super._getDefaultOptions(), {
showScrollbar: "never",
useNative: false,
selectedIndex: 0,
bounceEnabled: false,
items: [],
showOnClick: false,
onClick: null,
onSelectedIndexChanged: null,
scrollByContent: true
})
}
_init() {
super._init();
this.option("onVisibilityChange", this._visibilityChangedHandler.bind(this));
this.option("onEnd", this._endActionHandler.bind(this))
}
_render() {
super._render();
this._renderSelectedItemFrame();
this.$element().addClass(DATEVIEW_ROLLER_CLASS);
this._renderContainerClick();
this._renderItems();
this._renderSelectedValue();
this._renderItemsClick();
this._renderWheelEvent();
this._renderSelectedIndexChanged()
}
_renderSelectedIndexChanged() {
this._selectedIndexChanged = this._createActionByOption("onSelectedIndexChanged")
}
_renderWheelEvent() {
eventsEngine.on($(this.container()), "dxmousewheel", e => {
this._isWheelScrolled = true
})
}
_renderContainerClick() {
if (!this.option("showOnClick")) {
return
}
var eventName = addNamespace(clickEventName, this.NAME);
var clickAction = this._createActionByOption("onClick");
eventsEngine.off($(this.container()), eventName);
eventsEngine.on($(this.container()), eventName, (function(e) {
clickAction({
event: e
})
}))
}
_renderItems() {
var items = this.option("items") || [];
var $items = $();
$(this.content()).empty();
items.forEach((function(item) {
$items = $items.add($("<div>").addClass(DATEVIEW_ROLLER_ITEM_CLASS).append(item))
}));
$(this.content()).append($items);
this._$items = $items;
this.update()
}
_renderSelectedItemFrame() {
$("<div>").addClass(DATEVIEW_ROLLER_ITEM_SELECTED_FRAME_CLASS).append($("<div>").addClass(DATEVIEW_ROLLER_ITEM_SELECTED_BORDER_CLASS)).appendTo($(this.container()))
}
_renderSelectedValue(selectedIndex) {
var index = this._fitIndex(null !== selectedIndex && void 0 !== selectedIndex ? selectedIndex : this.option("selectedIndex"));
this._moveTo({
top: this._getItemPosition(index)
});
this._renderActiveStateItem()
}
_fitIndex(index) {
var items = this.option("items") || [];
var itemCount = items.length;
if (index >= itemCount) {
return itemCount - 1
}
if (index < 0) {
return 0
}
return index
}
_getItemPosition(index) {
return Math.round(this._itemHeight() * index)
}
_renderItemsClick() {
var itemSelector = this._getItemSelector();
var eventName = addNamespace(clickEventName, this.NAME);
eventsEngine.off(this.$element(), eventName, itemSelector);
eventsEngine.on(this.$element(), eventName, itemSelector, this._itemClickHandler.bind(this))
}
_getItemSelector() {
return "." + DATEVIEW_ROLLER_ITEM_CLASS
}
_itemClickHandler(e) {
this.option("selectedIndex", this._itemElementIndex(e.currentTarget))
}
_itemElementIndex(itemElement) {
return this._itemElements().index(itemElement)
}
_itemElements() {
return this.$element().find(this._getItemSelector())
}
_renderActiveStateItem() {
var selectedIndex = this.option("selectedIndex");
each(this._$items, (function(index) {
$(this).toggleClass(DATEVIEW_ROLLER_ITEM_SELECTED_CLASS, selectedIndex === index)
}))
}
_shouldScrollToNeighborItem() {
return "desktop" === devices.real().deviceType && this._isWheelScrolled
}
_moveTo(targetLocation) {
var {
top: top,
left: left
} = convertToLocation(targetLocation);
var location = this.scrollOffset();
var delta = {
x: location.left - left,
y: location.top - top
};
if (this._isVisible() && (delta.x || delta.y)) {
this._prepareDirections(true);
if (this._animation && !this._shouldScrollToNeighborItem()) {
var that = this;
fx.stop($(this.content()));
fx.animate($(this.content()), {
duration: 200,
type: "slide",
to: {
top: Math.floor(delta.y)
},
complete() {
resetPosition($(that.content()));
that.handleMove({
delta: delta
})
}
});
delete this._animation
} else {
this.handleMove({
delta: delta
})
}
}
}
_validate(e) {
return this._moveIsAllowed(e)
}
_fitSelectedIndexInRange(index) {
var itemsCount = this.option("items").length;
return Math.max(Math.min(index, itemsCount - 1), 0)
}
_isInNullNeighborhood(x) {
return -.1 <= x && x <= .1
}
_getSelectedIndexAfterScroll(currentSelectedIndex) {
var locationTop = this.scrollOffset().top;
var currentSelectedIndexPosition = currentSelectedIndex * this._itemHeight();
var dy = locationTop - currentSelectedIndexPosition;
if (this._isInNullNeighborhood(dy)) {
return currentSelectedIndex
}
var direction = dy > 0 ? 1 : -1;
var newSelectedIndex = this._fitSelectedIndexInRange(currentSelectedIndex + direction);
return newSelectedIndex
}
_getNewSelectedIndex(currentSelectedIndex) {
if (this._shouldScrollToNeighborItem()) {
return this._getSelectedIndexAfterScroll(currentSelectedIndex)
}
this._animation = true;
var ratio = this.scrollOffset().top / this._itemHeight();
return Math.round(ratio)
}
_endActionHandler() {
var currentSelectedIndex = this.option("selectedIndex");
var newSelectedIndex = this._getNewSelectedIndex(currentSelectedIndex);
if (newSelectedIndex === currentSelectedIndex) {
this._renderSelectedValue(newSelectedIndex)
} else {
this.option("selectedIndex", newSelectedIndex)
}
this._isWheelScrolled = false
}
_itemHeight() {
var $item = this._$items.first();
return getHeight($item)
}
_toggleActive(state) {
this.$element().toggleClass(DATEVIEW_ROLLER_ACTIVE_CLASS, state)
}
_isVisible() {
return $(this.container()).is(":visible")
}
_fireSelectedIndexChanged(value, previousValue) {
this._selectedIndexChanged({
value: value,
previousValue: previousValue,
event: void 0
})
}
_visibilityChanged(visible) {
super._visibilityChanged(visible);
this._visibilityChangedHandler(visible)
}
_visibilityChangedHandler(visible) {
if (visible) {
this._visibilityTimer = setTimeout(() => {
this._renderSelectedValue(this.option("selectedIndex"))
})
}
this.toggleActiveState(false)
}
toggleActiveState(state) {
this.$element().toggleClass(DATEVIEW_ROLLER_CURRENT_CLASS, state)
}
_refreshSelectedIndex() {
var selectedIndex = this.option("selectedIndex");
var fitIndex = this._fitIndex(selectedIndex);
if (fitIndex === selectedIndex) {
this._renderActiveStateItem()
} else {
this.option("selectedIndex", fitIndex)
}
}
_optionChanged(args) {
switch (args.name) {
case "selectedIndex":
this._fireSelectedIndexChanged(args.value, args.previousValue);
this._renderSelectedValue(args.value);
break;
case "items":
this._renderItems();
this._refreshSelectedIndex();
break;
case "onClick":
case "showOnClick":
this._renderContainerClick();
break;
case "onSelectedIndexChanged":
this._renderSelectedIndexChanged();
break;
default:
super._optionChanged(args)
}
}
_dispose() {
clearTimeout(this._visibilityTimer);
super._dispose()
}
}
registerComponent("dxDateViewRoller", DateViewRoller);
export default DateViewRoller;