Source/WebInspectorUI/UserInterface/Views/BezierEditor.js - WebKit - Git at Google

 /*
  * Copyright (C) 2015 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  * THE POSSIBILITY OF SUCH DAMAGE.
  */

 WI.BezierEditor = class BezierEditor extends WI.Object
 {
     constructor()
     {
         super();

         this._element = document.createElement("div");
         this._element.classList.add("bezier-editor");

         var editorWidth = 184;
         var editorHeight = 200;
         this._padding = 25;
         this._controlHandleRadius = 7;
         this._bezierWidth = editorWidth - (this._controlHandleRadius * 2);
         this._bezierHeight = editorHeight - (this._controlHandleRadius * 2) - (this._padding * 2);

         this._bezierPreviewContainer = this._element.createChild("div", "bezier-preview");
         this._bezierPreviewContainer.title = WI.UIString("Restart animation");
         this._bezierPreviewContainer.addEventListener("mousedown", this._resetPreviewAnimation.bind(this));

         this._bezierPreview = this._bezierPreviewContainer.createChild("div");

         this._bezierPreviewTiming = this._element.createChild("div", "bezier-preview-timing");

         this._bezierContainer = this._element.appendChild(createSVGElement("svg"));
         this._bezierContainer.setAttribute("width", editorWidth);
         this._bezierContainer.setAttribute("height", editorHeight);
         this._bezierContainer.classList.add("bezier-container");

         let svgGroup = this._bezierContainer.appendChild(createSVGElement("g"));
         svgGroup.setAttribute("transform", "translate(0, " + this._padding + ")");

         let linearCurve = svgGroup.appendChild(createSVGElement("line"));
         linearCurve.classList.add("linear-curve");
         linearCurve.setAttribute("x1", this._controlHandleRadius);
         linearCurve.setAttribute("y1", this._bezierHeight + this._controlHandleRadius);
         linearCurve.setAttribute("x2", this._bezierWidth + this._controlHandleRadius);
         linearCurve.setAttribute("y2", this._controlHandleRadius);

         this._bezierCurve = svgGroup.appendChild(createSVGElement("path"));
         this._bezierCurve.classList.add("bezier-curve");

         function createControl(x1, y1)
         {
             x1 += this._controlHandleRadius;
             y1 += this._controlHandleRadius;

             let line = svgGroup.appendChild(createSVGElement("line"));
             line.classList.add("control-line");
             line.setAttribute("x1", x1);
             line.setAttribute("y1", y1);
             line.setAttribute("x2", x1);
             line.setAttribute("y2", y1);

             let handle = svgGroup.appendChild(createSVGElement("circle"));
             handle.classList.add("control-handle");

             return {point: null, line, handle};
         }

         this._inControl = createControl.call(this, 0, this._bezierHeight);
         this._outControl = createControl.call(this, this._bezierWidth, 0);

         this._numberInputContainer = this._element.createChild("div", "number-input-container");

         function createBezierInput(id, {min, max} = {})
         {
             let key = "_bezier" + id + "Input";
             this[key] = this._numberInputContainer.createChild("input");
             this[key].type = "number";
             this[key].step = 0.01;

             if (!isNaN(min))
                 this[key].min = min;

             if (!isNaN(max))
                 this[key].max = max;

             this[key].addEventListener("input", this._handleNumberInputInput.bind(this));
             this[key].addEventListener("keydown", this._handleNumberInputKeydown.bind(this));
         }

         createBezierInput.call(this, "InX", {min: 0, max: 1});
         createBezierInput.call(this, "InY");
         createBezierInput.call(this, "OutX", {min: 0, max: 1});
         createBezierInput.call(this, "OutY");

         this._selectedControl = null;
         this._mouseDownPosition = null;
         this._bezierContainer.addEventListener("mousedown", this);

         WI.addWindowKeydownListener(this);
     }

     // Public

     get element()
     {
         return this._element;
     }

     set bezier(bezier)
     {
         if (!bezier)
             return;

         var isCubicBezier = bezier instanceof WI.CubicBezier;
         console.assert(isCubicBezier);
         if (!isCubicBezier)
             return;

         this._bezier = bezier;
         this._updateBezierPreview();
     }

     get bezier()
     {
         return this._bezier;
     }

     removeListeners()
     {
         WI.removeWindowKeydownListener(this);
     }

     // Protected

     handleEvent(event)
     {
         switch (event.type) {
         case "mousedown":
             this._handleMousedown(event);
             break;
         case "mousemove":
             this._handleMousemove(event);
             break;
         case "mouseup":
             this._handleMouseup(event);
             break;
         }
     }

     handleKeydownEvent(event)
     {
         if (!this._selectedControl || !this._element.parentNode)
             return false;

         let horizontal = 0;
         let vertical = 0;
         switch (event.keyCode) {
         case WI.KeyboardShortcut.Key.Up.keyCode:
             vertical = -1;
             break;
         case WI.KeyboardShortcut.Key.Right.keyCode:
             horizontal = 1;
             break;
         case WI.KeyboardShortcut.Key.Down.keyCode:
             vertical = 1;
             break;
         case WI.KeyboardShortcut.Key.Left.keyCode:
             horizontal = -1;
             break;
         default:
             return false;
         }

         if (event.shiftKey) {
             horizontal *= 10;
             vertical *= 10;
         }

         vertical *= this._bezierWidth / 100;
         horizontal *= this._bezierHeight / 100;

         this._selectedControl.point.x = Number.constrain(this._selectedControl.point.x + horizontal, 0, this._bezierWidth);
         this._selectedControl.point.y += vertical;
         this._updateControl(this._selectedControl);
         this._updateValue();

         return true;
     }

     // Private

     _handleMousedown(event)
     {
         if (event.button !== 0)
             return;

         window.addEventListener("mousemove", this, true);
         window.addEventListener("mouseup", this, true);

         this._bezierPreviewContainer.classList.remove("animate");
         this._bezierPreviewTiming.classList.remove("animate");

         this._updateControlPointsForMouseEvent(event, true);
     }

     _handleMousemove(event)
     {
         this._updateControlPointsForMouseEvent(event);
     }

     _handleMouseup(event)
     {
         this._selectedControl.handle.classList.remove("selected");
         this._mouseDownPosition = null;
         this._triggerPreviewAnimation();

         window.removeEventListener("mousemove", this, true);
         window.removeEventListener("mouseup", this, true);
     }

     _updateControlPointsForMouseEvent(event, calculateSelectedControlPoint)
     {
         var point = WI.Point.fromEventInElement(event, this._bezierContainer);
         point.x = Number.constrain(point.x - this._controlHandleRadius, 0, this._bezierWidth);
         point.y -= this._controlHandleRadius + this._padding;

         if (calculateSelectedControlPoint) {
             this._mouseDownPosition = point;

             if (this._inControl.point.distance(point) < this._outControl.point.distance(point))
                 this._selectedControl = this._inControl;
             else
                 this._selectedControl = this._outControl;
         }

         if (event.shiftKey && this._mouseDownPosition) {
             if (Math.abs(this._mouseDownPosition.x - point.x) > Math.abs(this._mouseDownPosition.y - point.y))
                 point.y = this._mouseDownPosition.y;
             else
                 point.x = this._mouseDownPosition.x;
         }

         this._selectedControl.point = point;
         this._selectedControl.handle.classList.add("selected");
         this._updateValue();
     }

     _updateValue()
     {
         function round(num)
         {
             return Math.round(num * 100) / 100;
         }

         var inValueX = round(this._inControl.point.x / this._bezierWidth);
         var inValueY = round(1 - (this._inControl.point.y / this._bezierHeight));

         var outValueX = round(this._outControl.point.x / this._bezierWidth);
         var outValueY = round(1 - (this._outControl.point.y / this._bezierHeight));

         this._bezier = new WI.CubicBezier(inValueX, inValueY, outValueX, outValueY);
         this._updateBezier();

         this.dispatchEventToListeners(WI.BezierEditor.Event.BezierChanged, {bezier: this._bezier});
     }

     _updateBezier()
     {
         var r = this._controlHandleRadius;
         var inControlX = this._inControl.point.x + r;
         var inControlY = this._inControl.point.y + r;
         var outControlX = this._outControl.point.x + r;
         var outControlY = this._outControl.point.y + r;
         var path = `M ${r} ${this._bezierHeight + r} C ${inControlX} ${inControlY} ${outControlX} ${outControlY} ${this._bezierWidth + r} ${r}`;
         this._bezierCurve.setAttribute("d", path);
         this._updateControl(this._inControl);
         this._updateControl(this._outControl);

         this._bezierInXInput.value = this._bezier.inPoint.x;
         this._bezierInYInput.value = this._bezier.inPoint.y;
         this._bezierOutXInput.value = this._bezier.outPoint.x;
         this._bezierOutYInput.value = this._bezier.outPoint.y;
     }

     _updateControl(control)
     {
         control.handle.setAttribute("cx", control.point.x + this._controlHandleRadius);
         control.handle.setAttribute("cy", control.point.y + this._controlHandleRadius);

         control.line.setAttribute("x2", control.point.x + this._controlHandleRadius);
         control.line.setAttribute("y2", control.point.y + this._controlHandleRadius);
     }

     _updateBezierPreview()
     {
         this._inControl.point = new WI.Point(this._bezier.inPoint.x * this._bezierWidth, (1 - this._bezier.inPoint.y) * this._bezierHeight);
         this._outControl.point = new WI.Point(this._bezier.outPoint.x * this._bezierWidth, (1 - this._bezier.outPoint.y) * this._bezierHeight);

         this._updateBezier();
         this._triggerPreviewAnimation();
     }

     _triggerPreviewAnimation()
     {
         this._bezierPreview.style.animationTimingFunction = this._bezier.toString();
         this._bezierPreviewContainer.classList.add("animate");
         this._bezierPreviewTiming.classList.add("animate");
     }

     _resetPreviewAnimation()
     {
         var parent = this._bezierPreview.parentNode;
         parent.removeChild(this._bezierPreview);
         parent.appendChild(this._bezierPreview);

         this._element.removeChild(this._bezierPreviewTiming);
         this._element.appendChild(this._bezierPreviewTiming);
     }

     _handleNumberInputInput(event)
     {
         this._changeBezierForInput(event.target, event.target.value);
     }

     _handleNumberInputKeydown(event)
     {
         let shift = 0;
         if (event.keyIdentifier === "Up")
             shift = 0.01;
          else if (event.keyIdentifier === "Down")
             shift = -0.01;

         if (!shift)
             return;

         if (event.shiftKey)
             shift *= 10;

         event.preventDefault();
         this._changeBezierForInput(event.target, parseFloat(event.target.value) + shift);
     }

     _changeBezierForInput(target, value)
     {
         value = Math.round(value * 100) / 100;

         switch (target) {
         case this._bezierInXInput:
             this._bezier.inPoint.x = Number.constrain(value, 0, 1);
             break;
         case this._bezierInYInput:
             this._bezier.inPoint.y = value;
             break;
         case this._bezierOutXInput:
             this._bezier.outPoint.x = Number.constrain(value, 0, 1);
             break;
         case this._bezierOutYInput:
             this._bezier.outPoint.y = value;
             break;
         default:
             return;
         }

         this._updateBezierPreview();

         this.dispatchEventToListeners(WI.BezierEditor.Event.BezierChanged, {bezier: this._bezier});
     }
 };

 WI.BezierEditor.Event = {
     BezierChanged: "bezier-editor-bezier-changed"
 };
	/*
	* Copyright (C) 2015 Apple Inc. All rights reserved.
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	*
	* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
	* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
	* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
	* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
	* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
	* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
	* THE POSSIBILITY OF SUCH DAMAGE.
	*/

	WI.BezierEditor = class BezierEditor extends WI.Object
	{
	constructor()
	{
	super();

	this._element = document.createElement("div");
	this._element.classList.add("bezier-editor");

	var editorWidth = 184;
	var editorHeight = 200;
	this._padding = 25;
	this._controlHandleRadius = 7;
	this._bezierWidth = editorWidth - (this._controlHandleRadius * 2);
	this._bezierHeight = editorHeight - (this._controlHandleRadius * 2) - (this._padding * 2);

	this._bezierPreviewContainer = this._element.createChild("div", "bezier-preview");
	this._bezierPreviewContainer.title = WI.UIString("Restart animation");
	this._bezierPreviewContainer.addEventListener("mousedown", this._resetPreviewAnimation.bind(this));

	this._bezierPreview = this._bezierPreviewContainer.createChild("div");

	this._bezierPreviewTiming = this._element.createChild("div", "bezier-preview-timing");

	this._bezierContainer = this._element.appendChild(createSVGElement("svg"));
	this._bezierContainer.setAttribute("width", editorWidth);
	this._bezierContainer.setAttribute("height", editorHeight);
	this._bezierContainer.classList.add("bezier-container");

	let svgGroup = this._bezierContainer.appendChild(createSVGElement("g"));
	svgGroup.setAttribute("transform", "translate(0, " + this._padding + ")");

	let linearCurve = svgGroup.appendChild(createSVGElement("line"));
	linearCurve.classList.add("linear-curve");
	linearCurve.setAttribute("x1", this._controlHandleRadius);
	linearCurve.setAttribute("y1", this._bezierHeight + this._controlHandleRadius);
	linearCurve.setAttribute("x2", this._bezierWidth + this._controlHandleRadius);
	linearCurve.setAttribute("y2", this._controlHandleRadius);

	this._bezierCurve = svgGroup.appendChild(createSVGElement("path"));
	this._bezierCurve.classList.add("bezier-curve");

	function createControl(x1, y1)
	{
	x1 += this._controlHandleRadius;
	y1 += this._controlHandleRadius;

	let line = svgGroup.appendChild(createSVGElement("line"));
	line.classList.add("control-line");
	line.setAttribute("x1", x1);
	line.setAttribute("y1", y1);
	line.setAttribute("x2", x1);
	line.setAttribute("y2", y1);

	let handle = svgGroup.appendChild(createSVGElement("circle"));
	handle.classList.add("control-handle");

	return {point: null, line, handle};
	}

	this._inControl = createControl.call(this, 0, this._bezierHeight);
	this._outControl = createControl.call(this, this._bezierWidth, 0);

	this._numberInputContainer = this._element.createChild("div", "number-input-container");

	function createBezierInput(id, {min, max} = {})
	{
	let key = "_bezier" + id + "Input";
	this[key] = this._numberInputContainer.createChild("input");
	this[key].type = "number";
	this[key].step = 0.01;

	if (!isNaN(min))
	this[key].min = min;

	if (!isNaN(max))
	this[key].max = max;

	this[key].addEventListener("input", this._handleNumberInputInput.bind(this));
	this[key].addEventListener("keydown", this._handleNumberInputKeydown.bind(this));
	}

	createBezierInput.call(this, "InX", {min: 0, max: 1});
	createBezierInput.call(this, "InY");
	createBezierInput.call(this, "OutX", {min: 0, max: 1});
	createBezierInput.call(this, "OutY");

	this._selectedControl = null;
	this._mouseDownPosition = null;
	this._bezierContainer.addEventListener("mousedown", this);

	WI.addWindowKeydownListener(this);
	}

	// Public

	get element()
	{
	return this._element;
	}

	set bezier(bezier)
	{
	if (!bezier)
	return;

	var isCubicBezier = bezier instanceof WI.CubicBezier;
	console.assert(isCubicBezier);
	if (!isCubicBezier)
	return;

	this._bezier = bezier;
	this._updateBezierPreview();
	}

	get bezier()
	{
	return this._bezier;
	}

	removeListeners()
	{
	WI.removeWindowKeydownListener(this);
	}

	// Protected

	handleEvent(event)
	{
	switch (event.type) {
	case "mousedown":
	this._handleMousedown(event);
	break;
	case "mousemove":
	this._handleMousemove(event);
	break;
	case "mouseup":
	this._handleMouseup(event);
	break;
	}
	}

	handleKeydownEvent(event)
	{
	if (!this._selectedControl \|\| !this._element.parentNode)
	return false;

	let horizontal = 0;
	let vertical = 0;
	switch (event.keyCode) {
	case WI.KeyboardShortcut.Key.Up.keyCode:
	vertical = -1;
	break;
	case WI.KeyboardShortcut.Key.Right.keyCode:
	horizontal = 1;
	break;
	case WI.KeyboardShortcut.Key.Down.keyCode:
	vertical = 1;
	break;
	case WI.KeyboardShortcut.Key.Left.keyCode:
	horizontal = -1;
	break;
	default:
	return false;
	}

	if (event.shiftKey) {
	horizontal *= 10;
	vertical *= 10;
	}

	vertical *= this._bezierWidth / 100;
	horizontal *= this._bezierHeight / 100;

	this._selectedControl.point.x = Number.constrain(this._selectedControl.point.x + horizontal, 0, this._bezierWidth);
	this._selectedControl.point.y += vertical;
	this._updateControl(this._selectedControl);
	this._updateValue();

	return true;
	}

	// Private

	_handleMousedown(event)
	{
	if (event.button !== 0)
	return;

	window.addEventListener("mousemove", this, true);
	window.addEventListener("mouseup", this, true);

	this._bezierPreviewContainer.classList.remove("animate");
	this._bezierPreviewTiming.classList.remove("animate");

	this._updateControlPointsForMouseEvent(event, true);
	}

	_handleMousemove(event)
	{
	this._updateControlPointsForMouseEvent(event);
	}

	_handleMouseup(event)
	{
	this._selectedControl.handle.classList.remove("selected");
	this._mouseDownPosition = null;
	this._triggerPreviewAnimation();

	window.removeEventListener("mousemove", this, true);
	window.removeEventListener("mouseup", this, true);
	}

	_updateControlPointsForMouseEvent(event, calculateSelectedControlPoint)
	{
	var point = WI.Point.fromEventInElement(event, this._bezierContainer);
	point.x = Number.constrain(point.x - this._controlHandleRadius, 0, this._bezierWidth);
	point.y -= this._controlHandleRadius + this._padding;

	if (calculateSelectedControlPoint) {
	this._mouseDownPosition = point;

	if (this._inControl.point.distance(point) < this._outControl.point.distance(point))
	this._selectedControl = this._inControl;
	else
	this._selectedControl = this._outControl;
	}

	if (event.shiftKey && this._mouseDownPosition) {
	if (Math.abs(this._mouseDownPosition.x - point.x) > Math.abs(this._mouseDownPosition.y - point.y))
	point.y = this._mouseDownPosition.y;
	else
	point.x = this._mouseDownPosition.x;
	}

	this._selectedControl.point = point;
	this._selectedControl.handle.classList.add("selected");
	this._updateValue();
	}

	_updateValue()
	{
	function round(num)
	{
	return Math.round(num * 100) / 100;
	}

	var inValueX = round(this._inControl.point.x / this._bezierWidth);
	var inValueY = round(1 - (this._inControl.point.y / this._bezierHeight));

	var outValueX = round(this._outControl.point.x / this._bezierWidth);
	var outValueY = round(1 - (this._outControl.point.y / this._bezierHeight));

	this._bezier = new WI.CubicBezier(inValueX, inValueY, outValueX, outValueY);
	this._updateBezier();

	this.dispatchEventToListeners(WI.BezierEditor.Event.BezierChanged, {bezier: this._bezier});
	}

	_updateBezier()
	{
	var r = this._controlHandleRadius;
	var inControlX = this._inControl.point.x + r;
	var inControlY = this._inControl.point.y + r;
	var outControlX = this._outControl.point.x + r;
	var outControlY = this._outControl.point.y + r;
	var path = `M ${r} ${this._bezierHeight + r} C ${inControlX} ${inControlY} ${outControlX} ${outControlY} ${this._bezierWidth + r} ${r}`;
	this._bezierCurve.setAttribute("d", path);
	this._updateControl(this._inControl);
	this._updateControl(this._outControl);

	this._bezierInXInput.value = this._bezier.inPoint.x;
	this._bezierInYInput.value = this._bezier.inPoint.y;
	this._bezierOutXInput.value = this._bezier.outPoint.x;
	this._bezierOutYInput.value = this._bezier.outPoint.y;
	}

	_updateControl(control)
	{
	control.handle.setAttribute("cx", control.point.x + this._controlHandleRadius);
	control.handle.setAttribute("cy", control.point.y + this._controlHandleRadius);

	control.line.setAttribute("x2", control.point.x + this._controlHandleRadius);
	control.line.setAttribute("y2", control.point.y + this._controlHandleRadius);
	}

	_updateBezierPreview()
	{
	this._inControl.point = new WI.Point(this._bezier.inPoint.x * this._bezierWidth, (1 - this._bezier.inPoint.y) * this._bezierHeight);
	this._outControl.point = new WI.Point(this._bezier.outPoint.x * this._bezierWidth, (1 - this._bezier.outPoint.y) * this._bezierHeight);

	this._updateBezier();
	this._triggerPreviewAnimation();
	}

	_triggerPreviewAnimation()
	{
	this._bezierPreview.style.animationTimingFunction = this._bezier.toString();
	this._bezierPreviewContainer.classList.add("animate");
	this._bezierPreviewTiming.classList.add("animate");
	}

	_resetPreviewAnimation()
	{
	var parent = this._bezierPreview.parentNode;
	parent.removeChild(this._bezierPreview);
	parent.appendChild(this._bezierPreview);

	this._element.removeChild(this._bezierPreviewTiming);
	this._element.appendChild(this._bezierPreviewTiming);
	}

	_handleNumberInputInput(event)
	{
	this._changeBezierForInput(event.target, event.target.value);
	}

	_handleNumberInputKeydown(event)
	{
	let shift = 0;
	if (event.keyIdentifier === "Up")
	shift = 0.01;
	else if (event.keyIdentifier === "Down")
	shift = -0.01;

	if (!shift)
	return;

	if (event.shiftKey)
	shift *= 10;

	event.preventDefault();
	this._changeBezierForInput(event.target, parseFloat(event.target.value) + shift);
	}

	_changeBezierForInput(target, value)
	{
	value = Math.round(value * 100) / 100;

	switch (target) {
	case this._bezierInXInput:
	this._bezier.inPoint.x = Number.constrain(value, 0, 1);
	break;
	case this._bezierInYInput:
	this._bezier.inPoint.y = value;
	break;
	case this._bezierOutXInput:
	this._bezier.outPoint.x = Number.constrain(value, 0, 1);
	break;
	case this._bezierOutYInput:
	this._bezier.outPoint.y = value;
	break;
	default:
	return;
	}

	this._updateBezierPreview();

	this.dispatchEventToListeners(WI.BezierEditor.Event.BezierChanged, {bezier: this._bezier});
	}
	};

	WI.BezierEditor.Event = {
	BezierChanged: "bezier-editor-bezier-changed"
	};