@blueprintjs/core
Version:
Core styles & components
134 lines (132 loc) • 21.7 kB
JavaScript
/*
* Copyright 2016 Palantir Technologies, Inc. All rights reserved.
* Licensed under the BSD-3 License as modified (the “License”); you may obtain a copy
* of the license at https://github.com/palantir/blueprint/blob/master/LICENSE
* and https://github.com/palantir/blueprint/blob/master/PATENTS
*/
;
var __extends = (this && this.__extends) || function (d, b) {
for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
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) {
__extends(Handle, _super);
function Handle() {
var _this = this;
_super.apply(this, arguments);
this.displayName = "Blueprint.SliderHandle";
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(event.clientX));
};
this.endHandleMovement = function (event) {
_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(event.clientX));
utils_1.safeInvoke(onRelease, finalValue);
};
this.handleHandleMovement = function (event) {
if (_this.state.isMoving && !_this.props.disabled) {
_this.changeValue(_this.clientToValue(event.clientX));
}
};
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);
}
};
}
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;
var isMoving = this.state.isMoving;
// getBoundingClientRect().height includes border size as opposed to clientHeight
var handleSize = (this.handleElement == null ? 0 : this.handleElement.getBoundingClientRect().height);
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, ref: this.refHandlers.handle, style: { left: Math.round((value - min) * tickSize - handleSize / 2) }, 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;
if (this.handleElement == null) {
return value;
}
var handleRect = this.handleElement.getBoundingClientRect();
var handleCenterPixel = handleRect.left + handleRect.width / 2;
var pixelDelta = clientPixel - handleCenterPixel;
// convert pixels to range value in increments of `stepSize`
var valueDelta = Math.round(pixelDelta / (tickSize * stepSize)) * stepSize;
return value + valueDelta;
};
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("Handle requires number 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.removeDocumentEventListeners = function () {
document.removeEventListener("mousemove", this.handleHandleMovement);
document.removeEventListener("mouseup", this.endHandleMovement);
};
Handle = __decorate([
PureRender
], Handle);
return Handle;
}(abstractComponent_1.AbstractComponent));
exports.Handle = Handle;
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All rights reserved.\n * Licensed under the BSD-3 License as modified (the “License”); you may obtain a copy\n * of the license at https://github.com/palantir/blueprint/blob/master/LICENSE\n * and https://github.com/palantir/blueprint/blob/master/PATENTS\n */\n\nimport * as classNames from \"classnames\";\nimport * as PureRender from \"pure-render-decorator\";\nimport * as React from \"react\";\n\nimport { AbstractComponent } from \"../../common/abstractComponent\";\nimport * as Classes from \"../../common/classes\";\nimport * as Keys from \"../../common/keys\";\nimport { IProps } from \"../../common/props\";\nimport { clamp, safeInvoke } from \"../../common/utils\";\n\nexport interface IHandleProps extends IProps {\n    disabled?: boolean;\n    label: React.ReactChild;\n    max: number;\n    min: number;\n    onChange?: (newValue: number) => void;\n    onRelease?: (newValue: number) => void;\n    stepSize: number;\n    tickSize: number;\n    value: number;\n}\n\nexport interface IHandleState {\n    /** whether slider handle is currently being dragged */\n    isMoving?: boolean;\n}\n\n// props that require number values, for validation\nconst NUMBER_PROPS = [\"max\", \"min\", \"stepSize\", \"tickSize\", \"value\"];\n\n@PureRender\nexport class Handle extends AbstractComponent<IHandleProps, IHandleState> {\n    public displayName = \"Blueprint.SliderHandle\";\n    public state = {\n        isMoving: false,\n    };\n\n    private handleElement: HTMLElement;\n    private refHandlers = {\n        handle: (el: HTMLSpanElement) => this.handleElement = el,\n    };\n\n    public render() {\n        const { className, disabled, label, min, tickSize, value } = this.props;\n        const { isMoving } = this.state;\n        // getBoundingClientRect().height includes border size as opposed to clientHeight\n        const handleSize = (this.handleElement == null ? 0 : this.handleElement.getBoundingClientRect().height);\n        return (\n            <span\n                className={classNames(Classes.SLIDER_HANDLE, { [Classes.ACTIVE]: isMoving }, className)}\n                onKeyDown={disabled ? null : this.handleKeyDown}\n                onKeyUp={disabled ? null : this.handleKeyUp}\n                onMouseDown={disabled ? null : this.beginHandleMovement}\n                ref={this.refHandlers.handle}\n                style={{ left: Math.round((value - min) * tickSize - handleSize / 2) }}\n                tabIndex={0}\n            >\n                {label == null ? null : <span className={Classes.SLIDER_LABEL}>{label}</span>}\n            </span>\n        );\n    }\n\n    public componentWillUnmount() {\n        this.removeDocumentEventListeners();\n    }\n\n    /** Convert client pixel to value between min and max. */\n    public clientToValue(clientPixel: number) {\n        const { stepSize, tickSize, value } = this.props;\n        if (this.handleElement == null) { return value; }\n        const handleRect = this.handleElement.getBoundingClientRect();\n        const handleCenterPixel = handleRect.left + handleRect.width / 2;\n        const pixelDelta = clientPixel - handleCenterPixel;\n        // convert pixels to range value in increments of `stepSize`\n        const valueDelta = Math.round(pixelDelta / (tickSize * stepSize)) * stepSize;\n        return value + valueDelta;\n    }\n\n    public beginHandleMovement = (event: MouseEvent | React.MouseEvent<HTMLElement>) => {\n        document.addEventListener(\"mousemove\", this.handleHandleMovement);\n        document.addEventListener(\"mouseup\", this.endHandleMovement);\n        this.setState({ isMoving: true });\n        this.changeValue(this.clientToValue(event.clientX));\n    }\n\n    protected validateProps(props: IHandleProps) {\n        for (const prop of NUMBER_PROPS) {\n            if (typeof (props as any)[prop] !== \"number\") {\n                throw new Error(`Handle requires number for ${prop} prop`);\n            }\n        }\n    }\n\n    private endHandleMovement = (event: MouseEvent) => {\n        this.removeDocumentEventListeners();\n        this.setState({ isMoving: false });\n        // not using changeValue because we want to invoke the handler regardless of current prop value\n        const { onRelease } = this.props;\n        const finalValue = this.clamp(this.clientToValue(event.clientX));\n        safeInvoke(onRelease, finalValue);\n    }\n\n    private handleHandleMovement = (event: MouseEvent) => {\n        if (this.state.isMoving && !this.props.disabled) {\n            this.changeValue(this.clientToValue(event.clientX));\n        }\n    }\n\n    private handleKeyDown = (event: React.KeyboardEvent<HTMLSpanElement>) => {\n        const { stepSize, value } = this.props;\n        const { which } = event;\n        if (which === Keys.ARROW_DOWN || which === Keys.ARROW_LEFT) {\n            this.changeValue(value - stepSize);\n            // this key event has been handled! prevent browser scroll on up/down\n            event.preventDefault();\n        } else if (which === Keys.ARROW_UP || which === Keys.ARROW_RIGHT) {\n            this.changeValue(value + stepSize);\n            event.preventDefault();\n        }\n    }\n\n    private handleKeyUp = (event: React.KeyboardEvent<HTMLSpanElement>) => {\n        if ([Keys.ARROW_UP, Keys.ARROW_DOWN, Keys.ARROW_LEFT, Keys.ARROW_RIGHT].indexOf(event.which) >= 0) {\n            safeInvoke(this.props.onRelease, this.props.value);\n        }\n    }\n\n    /** Clamp value and invoke callback if it differs from current value */\n    private changeValue(newValue: number, callback = this.props.onChange) {\n        newValue = this.clamp(newValue);\n        if (!isNaN(newValue) && this.props.value !== newValue) {\n            safeInvoke(callback, newValue);\n        }\n    }\n\n    /** Clamp value between min and max props */\n    private clamp(value: number) {\n        return clamp(value, this.props.min, this.props.max);\n    }\n\n    private removeDocumentEventListeners() {\n        document.removeEventListener(\"mousemove\", this.handleHandleMovement);\n        document.removeEventListener(\"mouseup\", this.endHandleMovement);\n    }\n}\n"],"sourceRoot":"/source/"}