TabBarIcon.js
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'use strict';
Object.defineProperty(exports, "__esModule", {
value: true
});
var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
var _react = require('react');
var React = _interopRequireWildcard(_react);
var _reactNative = require('react-native');
function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } else { var newObj = {}; if (obj != null) { for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) newObj[key] = obj[key]; } } newObj.default = obj; return newObj; } }
function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _possibleConstructorReturn(self, call) { if (!self) { throw new ReferenceError("this hasn't been initialised - super() hasn't been called"); } return call && (typeof call === "object" || typeof call === "function") ? call : self; }
function _inherits(subClass, superClass) { if (typeof superClass !== "function" && superClass !== null) { throw new TypeError("Super expression must either be null or a function, not " + typeof superClass); } subClass.prototype = Object.create(superClass && superClass.prototype, { constructor: { value: subClass, enumerable: false, writable: true, configurable: true } }); if (superClass) Object.setPrototypeOf ? Object.setPrototypeOf(subClass, superClass) : subClass.__proto__ = superClass; }
var TabBarIcon = function (_React$PureComponent) {
_inherits(TabBarIcon, _React$PureComponent);
function TabBarIcon() {
_classCallCheck(this, TabBarIcon);
return _possibleConstructorReturn(this, (TabBarIcon.__proto__ || Object.getPrototypeOf(TabBarIcon)).apply(this, arguments));
}
_createClass(TabBarIcon, [{
key: 'render',
value: function render() {
var _props = this.props,
position = _props.position,
scene = _props.scene,
navigation = _props.navigation,
activeTintColor = _props.activeTintColor,
inactiveTintColor = _props.inactiveTintColor,
style = _props.style;
var route = scene.route,
index = scene.index;
var routes = navigation.state.routes;
// Prepend '-1', so there are always at least 2 items in inputRange
var inputRange = [-1].concat(_toConsumableArray(routes.map(function (x, i) {
return i;
})));
var activeOpacity = position.interpolate({
inputRange: inputRange,
outputRange: inputRange.map(function (i) {
return i === index ? 1 : 0;
})
});
var inactiveOpacity = position.interpolate({
inputRange: inputRange,
outputRange: inputRange.map(function (i) {
return i === index ? 0 : 1;
})
});
// We render the icon twice at the same position on top of each other:
// active and inactive one, so we can fade between them.
return React.createElement(
_reactNative.View,
{ style: style },
React.createElement(
_reactNative.Animated.View,
{ style: [styles.icon, { opacity: activeOpacity }] },
this.props.renderIcon({
route: route,
index: index,
focused: true,
tintColor: activeTintColor
})
),
React.createElement(
_reactNative.Animated.View,
{ style: [styles.icon, { opacity: inactiveOpacity }] },
this.props.renderIcon({
route: route,
index: index,
focused: false,
tintColor: inactiveTintColor
})
)
);
}
}]);
return TabBarIcon;
}(React.PureComponent);
exports.default = TabBarIcon;
var styles = _reactNative.StyleSheet.create({
icon: {
// We render the icon twice at the same position on top of each other:
// active and inactive one, so we can fade between them:
// Cover the whole iconContainer:
position: 'absolute',
top: 0,
left: 0,
right: 0,
bottom: 0,
alignItems: 'center',
justifyContent: 'center'
}
});