381 lines
12 KiB
JavaScript
381 lines
12 KiB
JavaScript
/*
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The MIT License (MIT)
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Copyright (c) 2014 Alex Yatskov
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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THE SOFTWARE.
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*/
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(function(grapher) {
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'use strict';
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//
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// Coord
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//
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function Coord(x, y) {
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this.x = x;
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this.y = y;
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}
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//
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// Rect
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//
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function Rect(left, top, width, height) {
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this.left = left;
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this.top = top;
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this.width = width;
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this.height = height;
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this.right = left + width;
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this.bottom = top + height;
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this.contains = function(coord) {
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var contained =
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coord.x >= this.left &&
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coord.x < this.right &&
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coord.y >= this.top &&
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coord.y < this.bottom;
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return contained;
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};
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this.intersection = function(rect) {
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var left = Math.max(this.left, rect.left);
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var top = Math.max(this.top, rect.top);
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var right = Math.min(this.right, rect.right);
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var bottom = Math.min(this.bottom, rect.bottom);
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return new Rect(left, top, right - left, bottom - top);
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};
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}
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//
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// Range
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//
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function Range(start, end) {
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this.start = Math.min(start, end);
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this.end = Math.max(start, end);
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this.contains = function(value) {
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return value >= this.start && value <= this.end;
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};
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this.length = function() {
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return this.end - this.start;
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};
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this.clamp = function(value) {
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if (value < this.start) {
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return this.start;
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}
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if (value > this.end) {
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return this.end;
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}
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return value;
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};
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this.include = function(range) {
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this.start = Math.min(this.start, range.start);
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this.end = Math.max(this.end, range.end);
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};
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this.offset = function(value, clamp) {
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if (clamp) {
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value = this.clamp(value);
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}
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return (value - this.start) / this.length();
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};
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}
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//
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// Column
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//
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function Column(params) {
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var _emptyColor = '#eeeeec';
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var _strokeColor = '#d3d7cf';
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var _tickColor = '#888a85';
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var _fillColorNeg = '#3465a4';
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var _fillColorPos = '#cc0000';
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var _handleColorNeg = '#204a87';
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var _handleColorPos = '#a40000';
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var _desatOffset = -0.3;
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var _handleSize = 10;
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var _densitySize = 10;
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var _panelSize = 20;
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var _tickSize = 5;
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var _width = 125;
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var _height = 500;
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var _padding = 10;
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var _canvas = params.canvas;
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var _name = params.name;
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var _data = params.data;
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var _scale = params.scale;
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var _range = params.range;
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var _steps = params.steps;
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var _index = params.index;
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var _elements = {};
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function createShapes() {
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_elements.gradient = _canvas.gradient(decimateHints());
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_elements.backdrop = _canvas.rect(
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_tickSize, 0, _width - (_densitySize + _tickSize), _height - _panelSize
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).attr({'stroke': '#d3d7cf', 'fill': '#eeeeec'});
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_elements.density = _canvas.rect(
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_width - _densitySize, 0, _densitySize, _height - _panelSize
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).attr({'stroke': '#d3d7cf', 'fill': _elements.gradient});
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_elements.panel = _canvas.rect( _tickSize,
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_height - _panelSize, _width - _tickSize, _panelSize
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).attr({'fill': '#d3d7cf'});
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_elements.label = _canvas.text(
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_tickSize + (_width - _tickSize) / 2, _height - _panelSize / 2, _name
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).attr({'dominant-baseline': 'middle', 'text-anchor': 'middle'});
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var range = computeIndicatorRange();
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_elements.indicator = _canvas.rect(
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_tickSize, range.start, _width - (_densitySize + _tickSize), (range.end - range.start)
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).attr({'fill': computeFillColor()});
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if (_range.contains(0.0)) {
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var origin = valueToIndicator(0.0);
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_elements.tick = _canvas.line( 0, origin, _tickSize, origin
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).attr({'stroke': '#888a85'});
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}
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_elements.group = _canvas.group(
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_elements.backdrop,
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_elements.indicator,
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_elements.density,
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_elements.panel,
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_elements.tick,
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_elements.label
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);
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_elements.group.transform(Snap.format('t{x},{y}', {x: _index * (_width + _padding), y: 0}));
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}
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function updateShapes() {
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_elements.gradient = _canvas.gradient(decimateHints());
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_elements.density.attr('fill', _elements.gradient);
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var range = computeIndicatorRange();
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_elements.indicator.params({
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'y': range.start,
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'height': range.end - range.start,
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'fill': computeFillColor()
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});
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}
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function decimateHints() {
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var colorStops = 'l(0,0,0,1)';
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var groups = groupHints();
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for (var i = 0, count = groups.length; i < count; ++i) {
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var groupSize = groups[i];
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var colorPercent = 0;
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if (_scale.length() > 0) {
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colorPercent = Math.max(0, groupSize - _scale.start) / _scale.length();
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}
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var colorByte = 0xff - Math.min(0xff, Math.round(0xff * colorPercent));
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var colorObj = tinycolor({ r: colorByte, g: colorByte, b: colorByte });
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var colorStr = colorObj.toHexString();
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colorStops += colorStr;
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if (i + 1 < count) {
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colorStops += '-';
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}
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}
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return colorStops;
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}
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function groupHints() {
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var stepSize = _range.length() / _steps;
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var hintGroups = [];
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for (var i = 0; i < _steps; ++i) {
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var stepMax = _range.end - stepSize * i;
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var stepMin = stepMax - stepSize;
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var hintCount = 0;
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for (var j = 0, count = _data.hints.length; j < count; ++j) {
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var hint = _data.hints[j];
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if (hint.sample > stepMin && hint.sample <= stepMax) {
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hintCount += hint.count;
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}
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}
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hintGroups.push(hintCount);
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}
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return hintGroups;
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}
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function setClampedValue(value, final) {
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_data.value = _range.clamp(value);
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if (final && onValueChanged) {
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onValueChanged(_name, _data.value);
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}
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updateShapes();
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}
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function valueColorAdjust(color, offset) {
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var colorObj = tinycolor(color);
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var rangeEnd = _data.value >= 0.0 ? _range.end : _range.start;
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var rangeMid = (_range.start + _range.end) / 2.0;
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var rangeRat = (_data.value - rangeMid) / (rangeEnd - rangeMid);
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var desatVal = Math.max(0.0, 1.0 - rangeRat + offset) * 100.0;
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return colorObj.desaturate(desatVal).toHexString();
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}
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function computeFillColor() {
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var color = _data.value >= 0.0 ? _fillColorPos : _fillColorNeg;
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return valueColorAdjust(color, _desatOffset);
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}
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function computeHandleColor() {
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var color = _data.value >= 0.0 ? _handleColorPos : _handleColorNeg;
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return valueColorAdjust(color, _desatOffset);
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}
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function computeIndicatorRange() {
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return new Range(valueToIndicator(0.0), valueToIndicator(_data.value));
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}
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function valueToIndicator(scalar) {
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var box = _elements.backdrop.getBBox();
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var ratio = box.height / _range.length();
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var offset = _range.offset(scalar, true);
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return box.y + box.height * (1.0 - offset);
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}
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this.update = function(data, scale) {
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_data = data;
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_scale = scale;
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updateShapes();
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};
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createShapes();
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}
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//
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// Grapher
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//
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grapher.Grapher = function(params) {
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var _canvas = params.canvas;
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var _columns = {};
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var _data = {};
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var _range = new Range(-1.0, 1.0);
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var _steps = params.steps || 20;
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var _useLocalScale = params.useLocalScale || true;
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var _useRelativeScale = params.useRelativeScale || true;
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var _onValueChanged = params.onValueChanged;
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function computeLocalScale(hints) {
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var counts = _.pluck(hints, 'count');
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var min = _useRelativeScale ? _.min(counts) : 0;
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return new Range(min, _.max(counts));
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}
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function computeGlobalScale(hintData) {
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var globalScale = null;
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for (var i = 0, count = hintData.length; i < count; ++i) {
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var localScale = computeLocalScale(hintData[i]);
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if (globalScale) {
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globalScale.include(localScale);
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}
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else {
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globalScale = localScale;
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}
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}
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return globalScale;
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}
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this.setColumns = function(columns) {
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var scale = 0;
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if (!_useLocalScale) {
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var hintData = _.pluck(columns, 'hints');
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scale = computeGlobalScale(hintData);
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}
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var index = 0;
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for (var name in columns) {
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var data = _data[name] = columns[name];
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if (_useLocalScale) {
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scale = computeLocalScale(data.hints);
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}
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var column = _columns[name];
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if (column) {
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column.update(data, scale);
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}
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else {
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_columns[name] = new Column({
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onValueChanged: _onValueChanged,
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steps: _steps,
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range: _range,
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canvas: _canvas,
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data: data,
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name: name,
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scale: scale,
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index: index++,
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});
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}
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}
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};
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this.setUseLocalScale = function(useLocalScale) {
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if (useLocalScale != _useLocalScale) {
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_useLocalScale = useLocalScale;
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this.setColumns(_data);
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}
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};
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this.setUseRelativeScale = function(useRelativeScale) {
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if (useRelativeScale != _useRelativeScale) {
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_useRelativeScale = useRelativeScale;
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this.setColumns(_data);
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}
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};
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};
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}(window.grapher = window.grapher || {}));
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