office-ui-fabric-react
Version:
Reusable React components for building experiences for Office 365.
108 lines • 6.6 kB
JavaScript
define(["require", "exports", "tslib", "react", "office-ui-fabric-react/lib/Utilities", "office-ui-fabric-react/lib/FocusZone", "office-ui-fabric-react/lib/Button", "office-ui-fabric-react/lib/Dropdown", "office-ui-fabric-react/lib/List", "office-ui-fabric-react/lib/TextField", "office-ui-fabric-react/lib/Checkbox", "./List.Scrolling.Example.scss"], function (require, exports, tslib_1, React, Utilities_1, FocusZone_1, Button_1, Dropdown_1, List_1, TextField_1, Checkbox_1) {
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var evenItemHeight = 25;
var oddItemHeight = 50;
var numberOfItemsOnPage = 10;
var ListScrollingExample = /** @class */ (function (_super) {
tslib_1.__extends(ListScrollingExample, _super);
function ListScrollingExample(props) {
var _this = _super.call(this, props) || this;
_this._onChangeText = function (ev, value) {
_this._scroll(parseInt(value, 10) || 0, _this.state.scrollToMode);
};
_this._onDropdownChange = function (event, option) {
var scrollMode = _this.state.scrollToMode;
switch (option.key) {
case 'auto':
scrollMode = 0 /* auto */;
break;
case 'top':
scrollMode = 1 /* top */;
break;
case 'bottom':
scrollMode = 2 /* bottom */;
break;
case 'center':
scrollMode = 3 /* center */;
break;
}
_this._scroll(_this.state.selectedIndex, scrollMode);
};
_this._onRenderCell = function (item, index) {
return (React.createElement("div", { className: "ms-ListScrollingExample-itemCell", "data-is-focusable": true },
React.createElement("div", { className: Utilities_1.css('ms-ListScrollingExample-itemContent', index % 2 === 0 && 'ms-ListScrollingExample-itemContent-even', index % 2 === 1 && 'ms-ListScrollingExample-itemContent-odd') },
index,
" \u00A0 ",
item.name)));
};
_this._scrollRelative = function (delta) {
return function () {
_this._scroll(_this.state.selectedIndex + delta, _this.state.scrollToMode);
};
};
_this._scroll = function (index, scrollToMode) {
var updatedSelectedIndex = Math.min(Math.max(index, 0), _this.props.items.length - 1);
_this.setState({
selectedIndex: updatedSelectedIndex,
scrollToMode: scrollToMode
}, function () {
_this._list.scrollToIndex(updatedSelectedIndex, function (idx) { return (idx % 2 === 0 ? evenItemHeight : oddItemHeight); }, scrollToMode);
});
};
_this._resolveList = function (list) {
_this._list = list;
};
_this._onShowItemIndexInViewChanged = function (event, checked) {
_this.setState({
showItemIndexInView: checked
});
};
_this.state = {
selectedIndex: 0,
scrollToMode: 0 /* auto */,
showItemIndexInView: false
};
return _this;
}
ListScrollingExample.prototype.render = function () {
var items = this.props.items;
return (React.createElement(FocusZone_1.FocusZone, { direction: FocusZone_1.FocusZoneDirection.vertical },
React.createElement("div", null,
React.createElement(Button_1.DefaultButton, { onClick: this._scrollRelative(-10) }, "-10"),
React.createElement(Button_1.DefaultButton, { onClick: this._scrollRelative(-1) }, "-1"),
React.createElement(Button_1.DefaultButton, { onClick: this._scrollRelative(1) }, "+1"),
React.createElement(Button_1.DefaultButton, { onClick: this._scrollRelative(10) }, "+10")),
React.createElement(Dropdown_1.Dropdown, { placeHolder: "Select an Option", label: "Scroll To Mode:", id: "Scrolldrop1", ariaLabel: "Scroll To Mode", defaultSelectedKey: 'auto', options: [
{ key: 'auto', text: 'Auto' },
{ key: 'top', text: 'Top' },
{ key: 'bottom', text: 'Bottom' },
{ key: 'center', text: 'Center' }
], onChange: this._onDropdownChange }),
React.createElement("div", null,
"Scroll item index:",
React.createElement(TextField_1.TextField, { value: this.state.selectedIndex.toString(10), onChange: this._onChangeText })),
React.createElement("div", null,
React.createElement(Checkbox_1.Checkbox, { label: "Show index of the first item in view when unmounting", checked: this.state.showItemIndexInView, onChange: this._onShowItemIndexInViewChanged })),
React.createElement("div", { className: "ms-ListScrollingExample-container", "data-is-scrollable": true },
React.createElement(List_1.List, { ref: this._resolveList, items: items, getPageHeight: this._getPageHeight, onRenderCell: this._onRenderCell }))));
};
ListScrollingExample.prototype.componentWillUnmount = function () {
if (this.state.showItemIndexInView) {
var itemIndexInView = this._list.getStartItemIndexInView(function (idx) { return (idx % 2 === 0 ? evenItemHeight : oddItemHeight); } /* measureItem */);
alert('unmounting, getting first item index that was in view: ' + itemIndexInView);
}
};
ListScrollingExample.prototype._getPageHeight = function (idx) {
var h = 0;
for (var i = idx; i < idx + numberOfItemsOnPage; ++i) {
var isEvenRow = i % 2 === 0;
h += isEvenRow ? evenItemHeight : oddItemHeight;
}
return h;
};
return ListScrollingExample;
}(React.Component));
exports.ListScrollingExample = ListScrollingExample;
});
//# sourceMappingURL=List.Scrolling.Example.js.map