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/*
* Copyright (C) 2019 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.
*/
// StackedColumnChart creates a chart with filled columns each stratified with sections.
//
// Initialize the chart with a size.
// To populate with data, first initialize the sections. The class names you
// provide for the segments will allow you to style them. You can then include
// a new set of (x, totalHeight, w, [h1, h2, h3]) points in the chart via `addColumnSet`.
// The order of `h` values must be in the same order as the sections.
// The `y` value to be used for each column is `totalHeight - h`.
//
// SVG:
//
// - There is a single rect for each bar and each section.
// - Each bar extends all the way down to the bottom, they are layered such
// that the rects for early sections overlap the sections for later sections.
//
// <div class="stacked-column-chart">
// <svg viewBox="0 0 800 75">
// <rect class="section-class-name-3" width="<w>" height="<h3>" x="<x>" y="<y>" />
// <rect class="section-class-name-2" width="<w>" height="<h2>" x="<x>" y="<y>" />
// <rect class="section-class-name-1" width="<w>" height="<h1>" x="<x>" y="<y>" />
// ...
// </svg>
// </div>
WI.StackedColumnChart = class StackedColumnChart extends WI.View
{
constructor(size)
{
super();
this.element.classList.add("stacked-column-chart");
this._svgElement = this.element.appendChild(createSVGElement("svg"));
this._svgElement.setAttribute("preserveAspectRatio", "none");
this._sections = null;
this._columns = [];
this.size = size;
}
// Public
get size()
{
return this._size;
}
set size(size)
{
this._size = size;
this._svgElement.setAttribute("viewBox", `0 0 ${size.width} ${size.height}`);
}
initializeSections(sectionClassNames)
{
console.assert(this._sections === null, "Should not initialize multiple times");
this._sections = sectionClassNames;
}
addColumnSet(x, totalHeight, width, heights, additionalClass)
{
console.assert(heights.length === this._sections.length, "Wrong number of sections in columns set", heights.length, this._sections.length);
this._columns.push({x, totalHeight, width, heights, additionalClass});
}
clear()
{
this._columns = [];
}
// Protected
layout()
{
super.layout();
if (this.layoutReason === WI.View.LayoutReason.Resize)
return;
this._svgElement.removeChildren();
for (let {x, totalHeight, width, heights, additionalClass} of this._columns) {
for (let i = heights.length - 1; i >= 0; --i) {
let height = heights[i];
// Next rect will be identical, skip this one.
if (height === heights[i - 1])
continue;
let y = totalHeight - height;
let rect = this._svgElement.appendChild(createSVGElement("rect"));
rect.classList.add(this._sections[i]);
if (additionalClass)
rect.classList.add(additionalClass);
rect.setAttribute("width", width);
rect.setAttribute("height", height);
rect.setAttribute("x", x);
rect.setAttribute("y", y);
}
}
}
};
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