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/*
* Copyright (C) 2016 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.
*/
// LineChart creates a single filled line chart.
//
// Initialize the chart with a size. You can then include a new point
// in the line chart by providing an (x, y) point via `addPoint`.
//
// SVG:
//
// - There is a single path for line.
//
// <div class="line-chart">
// <svg width="800" height="75" viewbox="0 0 800 75">
// <path d="..."/>
// </svg>
// </div>
WebInspector.LineChart = class LineChart
{
constructor(size)
{
this._element = document.createElement("div");
this._element.classList.add("line-chart");
this._chartElement = this._element.appendChild(createSVGElement("svg"));
this._pathElement = this._chartElement.appendChild(createSVGElement("path"));
this._points = [];
this.size = size;
}
// Public
get element() { return this._element; }
get points() { return this._points; }
get size()
{
return this._size;
}
set size(size)
{
this._size = size;
this._chartElement.setAttribute("width", size.width);
this._chartElement.setAttribute("height", size.height);
this._chartElement.setAttribute("viewbox", `0 0 ${size.width} ${size.height}`);
}
addPoint(x, y)
{
this._points.push({x, y});
}
clear()
{
this._points = [];
}
needsLayout()
{
if (this._scheduledLayoutUpdateIdentifier)
return;
this._scheduledLayoutUpdateIdentifier = requestAnimationFrame(this.updateLayout.bind(this));
}
updateLayout()
{
if (this._scheduledLayoutUpdateIdentifier) {
cancelAnimationFrame(this._scheduledLayoutUpdateIdentifier);
this._scheduledLayoutUpdateIdentifier = undefined;
}
let pathComponents = [];
pathComponents.push(`M 0 ${this._size.height}`);
for (let point of this._points)
pathComponents.push(`L ${point.x} ${point.y}`);
let lastX = this._points.length ? this._points.lastValue.x : 0;
pathComponents.push(`L ${lastX} ${this._size.height}`);
pathComponents.push("Z");
let pathString = pathComponents.join(" ");
this._pathElement.setAttribute("d", pathString);
}
};
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