@blueprintjs/core
Version:
Core styles & components
174 lines (173 loc) • 9.27 kB
JavaScript
;
/*
* Copyright 2016 Palantir Technologies, Inc. All rights reserved.
*
* Licensed under the terms of the LICENSE file distributed with this project.
*/
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var classNames = require("classnames");
var PureRender = require("pure-render-decorator");
var React = require("react");
var abstractComponent_1 = require("../../common/abstractComponent");
var Classes = require("../../common/classes");
var Keys = require("../../common/keys");
var utils_1 = require("../../common/utils");
// props that require number values, for validation
var NUMBER_PROPS = ["max", "min", "stepSize", "tickSize", "value"];
var Handle = (function (_super) {
tslib_1.__extends(Handle, _super);
function Handle() {
var _this = _super !== null && _super.apply(this, arguments) || this;
_this.state = {
isMoving: false,
};
_this.refHandlers = {
handle: function (el) { return (_this.handleElement = el); },
};
_this.beginHandleMovement = function (event) {
document.addEventListener("mousemove", _this.handleHandleMovement);
document.addEventListener("mouseup", _this.endHandleMovement);
_this.setState({ isMoving: true });
_this.changeValue(_this.clientToValue(_this.mouseEventClientOffset(event)));
};
_this.beginHandleTouchMovement = function (event) {
document.addEventListener("touchmove", _this.handleHandleTouchMovement);
document.addEventListener("touchend", _this.endHandleTouchMovement);
document.addEventListener("touchcancel", _this.endHandleTouchMovement);
_this.setState({ isMoving: true });
_this.changeValue(_this.clientToValue(_this.touchEventClientOffset(event)));
};
_this.endHandleMovement = function (event) {
_this.handleMoveEndedAt(_this.mouseEventClientOffset(event));
};
_this.endHandleTouchMovement = function (event) {
_this.handleMoveEndedAt(_this.touchEventClientOffset(event));
};
_this.handleMoveEndedAt = function (clientPixel) {
_this.removeDocumentEventListeners();
_this.setState({ isMoving: false });
// not using changeValue because we want to invoke the handler regardless of current prop value
var onRelease = _this.props.onRelease;
var finalValue = _this.clamp(_this.clientToValue(clientPixel));
utils_1.safeInvoke(onRelease, finalValue);
};
_this.handleHandleMovement = function (event) {
_this.handleMovedTo(_this.mouseEventClientOffset(event));
};
_this.handleHandleTouchMovement = function (event) {
_this.handleMovedTo(_this.touchEventClientOffset(event));
};
_this.handleMovedTo = function (clientPixel) {
if (_this.state.isMoving && !_this.props.disabled) {
_this.changeValue(_this.clientToValue(clientPixel));
}
};
_this.handleKeyDown = function (event) {
var _a = _this.props, stepSize = _a.stepSize, value = _a.value;
var which = event.which;
if (which === Keys.ARROW_DOWN || which === Keys.ARROW_LEFT) {
_this.changeValue(value - stepSize);
// this key event has been handled! prevent browser scroll on up/down
event.preventDefault();
}
else if (which === Keys.ARROW_UP || which === Keys.ARROW_RIGHT) {
_this.changeValue(value + stepSize);
event.preventDefault();
}
};
_this.handleKeyUp = function (event) {
if ([Keys.ARROW_UP, Keys.ARROW_DOWN, Keys.ARROW_LEFT, Keys.ARROW_RIGHT].indexOf(event.which) >= 0) {
utils_1.safeInvoke(_this.props.onRelease, _this.props.value);
}
};
return _this;
}
Handle.prototype.render = function () {
var _a = this.props, className = _a.className, disabled = _a.disabled, label = _a.label, min = _a.min, tickSize = _a.tickSize, value = _a.value, vertical = _a.vertical;
var isMoving = this.state.isMoving;
var handleMidpoint = this.getHandleMidpointAndOffset(this.handleElement, true).handleMidpoint;
var offset = Math.round((value - min) * tickSize - handleMidpoint);
var style = vertical ? { bottom: offset } : { left: offset };
return (React.createElement("span", { className: classNames(Classes.SLIDER_HANDLE, (_b = {}, _b[Classes.ACTIVE] = isMoving, _b), className), onKeyDown: disabled ? null : this.handleKeyDown, onKeyUp: disabled ? null : this.handleKeyUp, onMouseDown: disabled ? null : this.beginHandleMovement, onTouchStart: disabled ? null : this.beginHandleTouchMovement, ref: this.refHandlers.handle, style: style, tabIndex: 0 }, label == null ? null : React.createElement("span", { className: Classes.SLIDER_LABEL }, label)));
var _b;
};
Handle.prototype.componentWillUnmount = function () {
this.removeDocumentEventListeners();
};
/** Convert client pixel to value between min and max. */
Handle.prototype.clientToValue = function (clientPixel) {
var _a = this.props, stepSize = _a.stepSize, tickSize = _a.tickSize, value = _a.value, vertical = _a.vertical;
if (this.handleElement == null) {
return value;
}
// #1769: this logic doesn't work perfectly when the tick size is
// smaller than the handle size; it may be off by a tick or two.
var clientPixelNormalized = vertical ? window.innerHeight - clientPixel : clientPixel;
var handleCenterPixel = this.getHandleElementCenterPixel(this.handleElement);
var pixelDelta = clientPixelNormalized - handleCenterPixel;
// convert pixels to range value in increments of `stepSize`
var valueDelta = Math.round(pixelDelta / (tickSize * stepSize)) * stepSize;
return value + valueDelta;
};
Handle.prototype.mouseEventClientOffset = function (event) {
return this.props.vertical ? event.clientY : event.clientX;
};
Handle.prototype.touchEventClientOffset = function (event) {
var touch = event.changedTouches[0];
return this.props.vertical ? touch.clientY : touch.clientX;
};
Handle.prototype.validateProps = function (props) {
for (var _i = 0, NUMBER_PROPS_1 = NUMBER_PROPS; _i < NUMBER_PROPS_1.length; _i++) {
var prop = NUMBER_PROPS_1[_i];
if (typeof props[prop] !== "number") {
throw new Error("[Blueprint] <Handle> requires number value for " + prop + " prop");
}
}
};
/** Clamp value and invoke callback if it differs from current value */
Handle.prototype.changeValue = function (newValue, callback) {
if (callback === void 0) { callback = this.props.onChange; }
newValue = this.clamp(newValue);
if (!isNaN(newValue) && this.props.value !== newValue) {
utils_1.safeInvoke(callback, newValue);
}
};
/** Clamp value between min and max props */
Handle.prototype.clamp = function (value) {
return utils_1.clamp(value, this.props.min, this.props.max);
};
Handle.prototype.getHandleElementCenterPixel = function (handleElement) {
var _a = this.getHandleMidpointAndOffset(handleElement), handleMidpoint = _a.handleMidpoint, handleOffset = _a.handleOffset;
return handleOffset + handleMidpoint;
};
Handle.prototype.getHandleMidpointAndOffset = function (handleElement, useOppositeDimension) {
if (useOppositeDimension === void 0) { useOppositeDimension = false; }
if (handleElement == null) {
return { handleMidpoint: 0, handleOffset: 0 };
}
var vertical = this.props.vertical;
// getBoundingClientRect().height includes border size; clientHeight does not.
var handleRect = handleElement.getBoundingClientRect();
var sizeKey = vertical
? useOppositeDimension ? "width" : "height"
: useOppositeDimension ? "height" : "width";
// "bottom" value seems to be consistently incorrect, so explicitly
// calculate it using the window offset instead.
var handleOffset = vertical ? window.innerHeight - (handleRect.top + handleRect[sizeKey]) : handleRect.left;
return { handleMidpoint: handleRect[sizeKey] / 2, handleOffset: handleOffset };
};
Handle.prototype.removeDocumentEventListeners = function () {
document.removeEventListener("mousemove", this.handleHandleMovement);
document.removeEventListener("mouseup", this.endHandleMovement);
document.removeEventListener("touchmove", this.handleHandleTouchMovement);
document.removeEventListener("touchend", this.endHandleTouchMovement);
document.removeEventListener("touchcancel", this.endHandleTouchMovement);
};
Handle.displayName = "Blueprint.SliderHandle";
Handle = tslib_1.__decorate([
PureRender
], Handle);
return Handle;
}(abstractComponent_1.AbstractComponent));
exports.Handle = Handle;