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polar.js
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/**
* Copyright 2012-2018, Plotly, Inc.
* All rights reserved.
*
* This source code is licensed under the MIT license found in the
* LICENSE file in the root directory of this source tree.
*/
'use strict';
var d3 = require('d3');
var tinycolor = require('tinycolor2');
var Plotly = require('../../plotly');
var Registry = require('../../registry');
var Lib = require('../../lib');
var Color = require('../../components/color');
var Drawing = require('../../components/drawing');
var Plots = require('../plots');
var Axes = require('../cartesian/axes');
var dragElement = require('../../components/dragelement');
var dragBox = require('../cartesian/dragbox');
var Fx = require('../../components/fx');
var Titles = require('../../components/titles');
var prepSelect = require('../cartesian/select');
var setCursor = require('../../lib/setcursor');
var MID_SHIFT = require('../../constants/alignment').MID_SHIFT;
var _ = Lib._;
var deg2rad = Lib.deg2rad;
var rad2deg = Lib.rad2deg;
var wrap360 = Lib.wrap360;
var wrap180 = Lib.wrap180;
var setConvertAngular = require('./helpers').setConvertAngular;
var constants = require('./constants');
function Polar(gd, id) {
this.id = id;
this.gd = gd;
this._hasClipOnAxisFalse = null;
this.traceHash = {};
this.layers = {};
this.clipPaths = {};
this.clipIds = {};
this.viewInitial = {};
var fullLayout = gd._fullLayout;
var clipIdBase = 'clip' + fullLayout._uid + id;
this.clipIds.circle = clipIdBase + '-circle';
this.clipPaths.circle = fullLayout._clips.append('clipPath')
.attr('id', this.clipIds.circle);
this.clipPaths.circle.append('path');
this.framework = fullLayout._polarlayer.append('g')
.attr('class', id);
// unfortunately, we have to keep track of some axis tick settings
// so that we don't have to call Axes.doTicks with its special redraw flag
this.radialTickLayout = null;
this.angularTickLayout = null;
}
var proto = Polar.prototype;
module.exports = function createPolar(gd, id) {
return new Polar(gd, id);
};
proto.plot = function(polarCalcData, fullLayout) {
var _this = this;
var polarLayout = fullLayout[_this.id];
_this._hasClipOnAxisFalse = false;
for(var i = 0; i < polarCalcData.length; i++) {
var trace = polarCalcData[i][0].trace;
if(trace.cliponaxis === false) {
_this._hasClipOnAxisFalse = true;
break;
}
}
_this.updateLayers(fullLayout, polarLayout);
_this.updateLayout(fullLayout, polarLayout);
Plots.generalUpdatePerTraceModule(_this.gd, _this, polarCalcData, polarLayout);
_this.updateFx(fullLayout, polarLayout);
};
proto.updateLayers = function(fullLayout, polarLayout) {
var _this = this;
var layers = _this.layers;
var radialLayout = polarLayout.radialaxis;
var angularLayout = polarLayout.angularaxis;
var layerNames = constants.layerNames;
var frontPlotIndex = layerNames.indexOf('frontplot');
var layerData = layerNames.slice(0, frontPlotIndex);
var isAngularAxisBelowTraces = angularLayout.layer === 'below traces';
var isRadialAxisBelowTraces = radialLayout.layer === 'below traces';
if(isAngularAxisBelowTraces) layerData.push('angular-axis');
if(isRadialAxisBelowTraces) layerData.push('radial-axis');
if(isAngularAxisBelowTraces) layerData.push('angular-line');
if(isRadialAxisBelowTraces) layerData.push('radial-line');
layerData.push('frontplot');
if(!isAngularAxisBelowTraces) layerData.push('angular-axis');
if(!isRadialAxisBelowTraces) layerData.push('radial-axis');
if(!isAngularAxisBelowTraces) layerData.push('angular-line');
if(!isRadialAxisBelowTraces) layerData.push('radial-line');
var join = _this.framework.selectAll('.polarsublayer')
.data(layerData, String);
join.enter().append('g')
.attr('class', function(d) { return 'polarsublayer ' + d;})
.each(function(d) {
var sel = layers[d] = d3.select(this);
switch(d) {
case 'frontplot':
sel.append('g').classed('scatterlayer', true);
break;
case 'backplot':
sel.append('g').classed('maplayer', true);
break;
case 'plotbg':
layers.bgcircle = sel.append('path');
break;
case 'radial-grid':
sel.style('fill', 'none');
sel.append('g').classed('x', 1);
break;
case 'angular-grid':
sel.style('fill', 'none');
sel.append('g').classed('angular', 1);
break;
case 'radial-line':
sel.append('line').style('fill', 'none');
break;
case 'angular-line':
sel.append('path').style('fill', 'none');
break;
}
});
join.order();
};
proto.updateLayout = function(fullLayout, polarLayout) {
var _this = this;
var layers = _this.layers;
var gs = fullLayout._size;
// layout domains
var xDomain = polarLayout.domain.x;
var yDomain = polarLayout.domain.y;
// offsets from paper edge to layout domain box
_this.xOffset = gs.l + gs.w * xDomain[0];
_this.yOffset = gs.t + gs.h * (1 - yDomain[1]);
// lengths of the layout domain box
var xLength = _this.xLength = gs.w * (xDomain[1] - xDomain[0]);
var yLength = _this.yLength = gs.h * (yDomain[1] - yDomain[0]);
// sector to plot
var sector = _this.sector = polarLayout.sector;
var sectorBBox = _this.sectorBBox = computeSectorBBox(sector);
var dxSectorBBox = sectorBBox[2] - sectorBBox[0];
var dySectorBBox = sectorBBox[3] - sectorBBox[1];
// aspect ratios
var arDomain = yLength / xLength;
var arSector = Math.abs(dySectorBBox / dxSectorBBox);
// actual lengths and domains of subplot box
var xLength2, yLength2;
var xDomain2, yDomain2;
var gap;
if(arDomain > arSector) {
xLength2 = xLength;
yLength2 = xLength * arSector;
gap = (yLength - yLength2) / gs.h / 2;
xDomain2 = [xDomain[0], xDomain[1]];
yDomain2 = [yDomain[0] + gap, yDomain[1] - gap];
} else {
xLength2 = yLength / arSector;
yLength2 = yLength;
gap = (xLength - xLength2) / gs.w / 2;
xDomain2 = [xDomain[0] + gap, xDomain[1] - gap];
yDomain2 = [yDomain[0], yDomain[1]];
}
_this.xLength2 = xLength2;
_this.yLength2 = yLength2;
_this.xDomain2 = xDomain2;
_this.yDomain2 = yDomain2;
// actual offsets from paper edge to the subplot box top-left corner
var xOffset2 = _this.xOffset2 = gs.l + gs.w * xDomain2[0];
var yOffset2 = _this.yOffset2 = gs.t + gs.h * (1 - yDomain2[1]);
// circle radius in px
var radius = _this.radius = xLength2 / dxSectorBBox;
// circle center position in px
var cx = _this.cx = xOffset2 - radius * sectorBBox[0];
var cy = _this.cy = yOffset2 + radius * sectorBBox[3];
// circle center in the coordinate system of plot area
var cxx = _this.cxx = cx - xOffset2;
var cyy = _this.cyy = cy - yOffset2;
_this.updateRadialAxis(fullLayout, polarLayout);
_this.updateRadialAxisTitle(fullLayout, polarLayout);
_this.updateAngularAxis(fullLayout, polarLayout);
var radialRange = _this.radialAxis.range;
var rSpan = radialRange[1] - radialRange[0];
var xaxis = _this.xaxis = {
type: 'linear',
_id: 'x',
range: [sectorBBox[0] * rSpan, sectorBBox[2] * rSpan],
domain: xDomain2
};
Axes.setConvert(xaxis, fullLayout);
xaxis.setScale();
var yaxis = _this.yaxis = {
type: 'linear',
_id: 'y',
range: [sectorBBox[1] * rSpan, sectorBBox[3] * rSpan],
domain: yDomain2
};
Axes.setConvert(yaxis, fullLayout);
yaxis.setScale();
xaxis.isPtWithinRange = function(d) { return _this.isPtWithinSector(d); };
yaxis.isPtWithinRange = function() { return true; };
layers.frontplot
.attr('transform', strTranslate(xOffset2, yOffset2))
.call(Drawing.setClipUrl, _this._hasClipOnAxisFalse ? null : _this.clipIds.circle);
layers.bgcircle.attr({
d: pathSectorClosed(radius, sector),
transform: strTranslate(cx, cy)
})
.call(Color.fill, polarLayout.bgcolor);
_this.clipPaths.circle.select('path')
.attr('d', pathSectorClosed(radius, sector))
.attr('transform', strTranslate(cxx, cyy));
// remove crispEdges - all the off-square angles in polar plots
// make these counterproductive.
_this.framework.selectAll('.crisp').classed('crisp', 0);
};
proto.updateRadialAxis = function(fullLayout, polarLayout) {
var _this = this;
var gd = _this.gd;
var layers = _this.layers;
var radius = _this.radius;
var cx = _this.cx;
var cy = _this.cy;
var gs = fullLayout._size;
var radialLayout = polarLayout.radialaxis;
var sector = polarLayout.sector;
var a0 = wrap360(sector[0]);
_this.fillViewInitialKey('radialaxis.angle', radialLayout.angle);
var ax = _this.radialAxis = Lib.extendFlat({}, radialLayout, {
_axislayer: layers['radial-axis'],
_gridlayer: layers['radial-grid'],
// make this an 'x' axis to make positioning (especially rotation) easier
_id: 'x',
_pos: 0,
// convert to 'x' axis equivalent
side: {counterclockwise: 'top', clockwise: 'bottom'}[radialLayout.side],
// spans length 1 radius
domain: [0, radius / gs.w],
// to get _boundingBox computation right when showticklabels is false
anchor: 'free',
position: 0,
// dummy truthy value to make Axes.doTicks draw the grid
_counteraxis: true,
// don't use automargins routine for labels
automargin: false
});
setScale(ax, radialLayout, fullLayout);
Axes.doAutoRange(ax);
radialLayout.range = ax.range.slice();
radialLayout._input.range = ax.range.slice();
_this.fillViewInitialKey('radialaxis.range', ax.range.slice());
// rotate auto tick labels by 180 if in quadrant II and III to make them
// readable from left-to-right
//
// TODO try moving deeper in doTicks for better results?
if(ax.tickangle === 'auto' && (a0 > 90 && a0 <= 270)) {
ax.tickangle = 180;
}
// easier to set rotate angle with custom translate function
ax._transfn = function(d) {
return 'translate(' + ax.l2p(d.x) + ',0)';
};
// set special grid path function
ax._gridpath = function(d) {
var r = ax.r2p(d.x);
return pathSector(r, sector);
};
var newTickLayout = strTickLayout(radialLayout);
if(_this.radialTickLayout !== newTickLayout) {
layers['radial-axis'].selectAll('.xtick').remove();
_this.radialTickLayout = newTickLayout;
}
Axes.doTicks(gd, ax, true);
updateElement(layers['radial-axis'], radialLayout.showticklabels || radialLayout.ticks, {
transform: strTranslate(cx, cy) + strRotate(-radialLayout.angle)
});
// move all grid paths to about circle center,
// undo individual grid lines translations
updateElement(layers['radial-grid'], radialLayout.showgrid, {
transform: strTranslate(cx, cy)
})
.selectAll('path').attr('transform', null);
updateElement(layers['radial-line'].select('line'), radialLayout.showline, {
x1: 0,
y1: 0,
x2: radius,
y2: 0,
transform: strTranslate(cx, cy) + strRotate(-radialLayout.angle)
})
.attr('stroke-width', radialLayout.linewidth)
.call(Color.stroke, radialLayout.linecolor);
};
proto.updateRadialAxisTitle = function(fullLayout, polarLayout, _angle) {
var _this = this;
var gd = _this.gd;
var radius = _this.radius;
var cx = _this.cx;
var cy = _this.cy;
var radialLayout = polarLayout.radialaxis;
var titleClass = _this.id + 'title';
var angle = _angle !== undefined ? _angle : radialLayout.angle;
var angleRad = deg2rad(angle);
var cosa = Math.cos(angleRad);
var sina = Math.sin(angleRad);
var pad = 0;
if(radialLayout.title) {
var h = Drawing.bBox(_this.layers['radial-axis'].node()).height;
var ts = radialLayout.titlefont.size;
pad = radialLayout.side === 'counterclockwise' ?
-h - ts * 0.4 :
h + ts * 0.8;
}
_this.layers['radial-axis-title'] = Titles.draw(gd, titleClass, {
propContainer: radialLayout,
propName: _this.id + '.radialaxis.title',
placeholder: _(gd, 'Click to enter radial axis title'),
attributes: {
x: cx + (radius / 2) * cosa + pad * sina,
y: cy - (radius / 2) * sina + pad * cosa,
'text-anchor': 'middle'
},
transform: {rotate: -angle}
});
};
proto.updateAngularAxis = function(fullLayout, polarLayout) {
var _this = this;
var gd = _this.gd;
var layers = _this.layers;
var radius = _this.radius;
var cx = _this.cx;
var cy = _this.cy;
var angularLayout = polarLayout.angularaxis;
var sector = polarLayout.sector;
var sectorInRad = sector.map(deg2rad);
_this.fillViewInitialKey('angularaxis.rotation', angularLayout.rotation);
var ax = _this.angularAxis = Lib.extendFlat({}, angularLayout, {
_axislayer: layers['angular-axis'],
_gridlayer: layers['angular-grid'],
// angular axes need *special* logic
_id: 'angular',
_pos: 0,
side: 'right',
// to get auto nticks right
domain: [0, Math.PI],
// to get _boundingBox computation right when showticklabels is false
anchor: 'free',
position: 0,
// dummy truthy value to make Axes.doTicks draw the grid
_counteraxis: true,
// don't use automargins routine for labels
automargin: false
});
// Set the angular range in degrees to make auto-tick computation cleaner,
// changing rotation/direction should not affect the angular tick labels.
if(ax.type === 'linear') {
ax.autorange = false;
if(isFullCircle(sector)) {
ax.range = sector.slice();
} else {
ax.range = sectorInRad.map(ax.unTransformRad).map(rad2deg);
}
// run rad2deg on tick0 and ditck for thetaunit: 'radians' axes
if(ax.thetaunit === 'radians') {
ax.tick0 = rad2deg(ax.tick0);
ax.dtick = rad2deg(ax.dtick);
}
}
// Use tickval filter for category axes instead of tweaking
// the range w.r.t sector, so that sectors that cross 360 can
// show all their ticks.
else if(ax.type === 'category') {
ax._tickFilter = function(d) {
return _this.isPtWithinSector({
r: _this.radialAxis.range[1],
rad: ax.c2rad(d.x)
});
};
}
setScale(ax, angularLayout, fullLayout);
Axes.doAutoRange(ax);
// wrapper around c2rad from setConvertAngular
// note that linear ranges are always set in degrees for Axes.doTicks
function c2rad(d) {
return ax.c2rad(d.x, 'degrees');
}
// (x,y) at max radius
function rad2xy(rad) {
return [radius * Math.cos(rad), radius * Math.sin(rad)];
}
ax._transfn = function(d) {
var rad = c2rad(d);
var xy = rad2xy(rad);
var out = strTranslate(cx + xy[0], cy - xy[1]);
// must also rotate ticks, but don't rotate labels and grid lines
var sel = d3.select(this);
if(sel && sel.node() && sel.classed('ticks')) {
out += strRotate(-rad2deg(rad));
}
return out;
};
ax._gridpath = function(d) {
var rad = c2rad(d);
var xy = rad2xy(rad);
return 'M0,0L' + (-xy[0]) + ',' + xy[1];
};
var offset4fontsize = (angularLayout.ticks !== 'outside' ? 0.7 : 0.5);
ax._labelx = function(d) {
var rad = c2rad(d);
var labelStandoff = ax._labelStandoff;
var pad = ax._pad;
var offset4tx = signSin(rad) === 0 ?
0 :
Math.cos(rad) * (labelStandoff + pad + offset4fontsize * d.fontSize);
var offset4tick = signCos(rad) * (d.dx + labelStandoff + pad);
return offset4tx + offset4tick;
};
ax._labely = function(d) {
var rad = c2rad(d);
var labelStandoff = ax._labelStandoff;
var labelShift = ax._labelShift;
var pad = ax._pad;
var offset4tx = d.dy + d.fontSize * MID_SHIFT - labelShift;
var offset4tick = -Math.sin(rad) * (labelStandoff + pad + offset4fontsize * d.fontSize);
return offset4tx + offset4tick;
};
ax._labelanchor = function(angle, d) {
var rad = c2rad(d);
return signSin(rad) === 0 ?
(signCos(rad) > 0 ? 'start' : 'end') :
'middle';
};
var newTickLayout = strTickLayout(angularLayout);
if(_this.angularTickLayout !== newTickLayout) {
layers['angular-axis'].selectAll('.angulartick').remove();
_this.angularTickLayout = newTickLayout;
}
Axes.doTicks(gd, ax, true);
updateElement(layers['angular-line'].select('path'), angularLayout.showline, {
d: pathSectorClosed(radius, sector),
transform: strTranslate(cx, cy)
})
.attr('stroke-width', angularLayout.linewidth)
.call(Color.stroke, angularLayout.linecolor);
};
proto.updateFx = function(fullLayout, polarLayout) {
if(!this.gd._context.staticPlot) {
this.updateAngularDrag(fullLayout, polarLayout);
this.updateRadialDrag(fullLayout, polarLayout);
this.updateMainDrag(fullLayout, polarLayout);
}
};
proto.updateMainDrag = function(fullLayout, polarLayout) {
var _this = this;
var gd = _this.gd;
var layers = _this.layers;
var zoomlayer = fullLayout._zoomlayer;
var MINZOOM = constants.MINZOOM;
var OFFEDGE = constants.OFFEDGE;
var radius = _this.radius;
var cx = _this.cx;
var cy = _this.cy;
var cxx = _this.cxx;
var cyy = _this.cyy;
var sector = polarLayout.sector;
var mainDrag = dragBox.makeDragger(layers, 'path', 'maindrag', 'crosshair');
d3.select(mainDrag)
.attr('d', pathSectorClosed(radius, sector))
.attr('transform', strTranslate(cx, cy));
var dragOpts = {
element: mainDrag,
gd: gd,
subplot: _this.id,
plotinfo: {
xaxis: _this.xaxis,
yaxis: _this.yaxis
},
xaxes: [_this.xaxis],
yaxes: [_this.yaxis]
};
// mouse px position at drag start (0), move (1)
var x0, y0;
// radial distance from circle center at drag start (0), move (1)
var r0, r1;
// zoombox persistent quantities
var path0, dimmed, lum;
// zoombox, corners elements
var zb, corners;
function xy2r(x, y) {
var xx = x - cxx;
var yy = y - cyy;
return Math.sqrt(xx * xx + yy * yy);
}
function xy2a(x, y) {
return Math.atan2(cyy - y, x - cxx);
}
function ra2xy(r, a) {
return [r * Math.cos(a), r * Math.sin(-a)];
}
function pathCorner(r, a) {
var clen = constants.cornerLen;
var chw = constants.cornerHalfWidth;
if(r === 0) return pathSectorClosed(2 * chw, sector);
var da = clen / r / 2;
var am = a - da;
var ap = a + da;
var rb = Math.max(0, Math.min(r, radius));
var rm = rb - chw;
var rp = rb + chw;
return 'M' + ra2xy(rm, am) +
'A' + [rm, rm] + ' 0,0,0 ' + ra2xy(rm, ap) +
'L' + ra2xy(rp, ap) +
'A' + [rp, rp] + ' 0,0,1 ' + ra2xy(rp, am) +
'Z';
}
function zoomPrep() {
r0 = null;
r1 = null;
path0 = pathSectorClosed(radius, sector);
dimmed = false;
var polarLayoutNow = gd._fullLayout[_this.id];
lum = tinycolor(polarLayoutNow.bgcolor).getLuminance();
zb = dragBox.makeZoombox(zoomlayer, lum, cx, cy, path0);
zb.attr('fill-rule', 'evenodd');
corners = dragBox.makeCorners(zoomlayer, cx, cy);
dragBox.clearSelect(zoomlayer);
}
function zoomMove(dx, dy) {
var x1 = x0 + dx;
var y1 = y0 + dy;
var rr0 = xy2r(x0, y0);
var rr1 = Math.min(xy2r(x1, y1), radius);
var a0 = xy2a(x0, y0);
var a1 = xy2a(x1, y1);
// starting or ending drag near center (outer edge),
// clamps radial distance at origin (at r=radius)
if(rr0 < OFFEDGE) rr0 = 0;
else if((radius - rr0) < OFFEDGE) rr0 = radius;
else if(rr1 < OFFEDGE) rr1 = 0;
else if((radius - rr1) < OFFEDGE) rr1 = radius;
var path1;
var cpath;
if(Math.abs(rr1 - rr0) > MINZOOM) {
// make sure r0 < r1,
// to get correct fill pattern in path1 below
if(rr0 < rr1) {
r0 = rr0;
r1 = rr1;
} else {
r0 = rr1;
r1 = rr0;
a1 = [a0, a0 = a1][0]; // swap a0 and a1
}
path1 = path0 + pathSectorClosed(r1, sector) + pathSectorClosed(r0, sector);
cpath = pathCorner(r0, a0) + pathCorner(r1, a1);
} else {
r0 = null;
r1 = null;
path1 = path0;
cpath = 'M0,0Z';
}
zb.attr('d', path1);
corners.attr('d', cpath);
dragBox.transitionZoombox(zb, corners, dimmed, lum);
dimmed = true;
}
function zoomDone() {
dragBox.removeZoombox(gd);
if(r0 === null || r1 === null) return;
dragBox.showDoubleClickNotifier(gd);
var radialAxis = _this.radialAxis;
var radialRange = radialAxis.range;
var drange = radialRange[1] - radialRange[0];
var updateObj = {};
updateObj[_this.id + '.radialaxis.range'] = [
radialRange[0] + r0 * drange / radius,
radialRange[0] + r1 * drange / radius
];
Plotly.relayout(gd, updateObj);
}
dragOpts.prepFn = function(evt, startX, startY) {
var dragModeNow = gd._fullLayout.dragmode;
var bbox = mainDrag.getBoundingClientRect();
x0 = startX - bbox.left;
y0 = startY - bbox.top;
switch(dragModeNow) {
case 'zoom':
dragOpts.moveFn = zoomMove;
dragOpts.doneFn = zoomDone;
zoomPrep(evt, startX, startY);
break;
case 'select':
case 'lasso':
prepSelect(evt, startX, startY, dragOpts, dragModeNow);
break;
}
};
dragOpts.clickFn = function(numClicks, evt) {
dragBox.removeZoombox(gd);
// TODO double once vs twice logic (autorange vs fixed range)
if(numClicks === 2) {
var updateObj = {};
for(var k in _this.viewInitial) {
updateObj[_this.id + '.' + k] = _this.viewInitial[k];
}
gd.emit('plotly_doubleclick', null);
Plotly.relayout(gd, updateObj);
}
Fx.click(gd, evt, _this.id);
};
mainDrag.onmousemove = function(evt) {
Fx.hover(gd, evt, _this.id);
gd._fullLayout._lasthover = mainDrag;
gd._fullLayout._hoversubplot = _this.id;
};
mainDrag.onmouseout = function(evt) {
if(gd._dragging) return;
dragElement.unhover(gd, evt);
};
dragElement.init(dragOpts);
};
proto.updateRadialDrag = function(fullLayout, polarLayout) {
var _this = this;
var gd = _this.gd;
var layers = _this.layers;
var radius = _this.radius;
var cx = _this.cx;
var cy = _this.cy;
var radialAxis = _this.radialAxis;
var radialLayout = polarLayout.radialaxis;
var angle0 = deg2rad(radialLayout.angle);
var range0 = radialAxis.range.slice();
var drange = range0[1] - range0[0];
var bl = constants.radialDragBoxSize;
var bl2 = bl / 2;
if(!radialLayout.visible) return;
var radialDrag = dragBox.makeRectDragger(layers, 'radialdrag', 'crosshair', -bl2, -bl2, bl, bl);
var dragOpts = {element: radialDrag, gd: gd};
var tx = cx + (radius + bl2) * Math.cos(angle0);
var ty = cy - (radius + bl2) * Math.sin(angle0);
d3.select(radialDrag)
.attr('transform', strTranslate(tx, ty));
// move function (either rotate or re-range flavor)
var moveFn2;
// rotate angle on done
var angle1;
// re-range range[1] on done
var rng1;
function moveFn(dx, dy) {
if(moveFn2) {
moveFn2(dx, dy);
} else {
var dvec = [dx, -dy];
var rvec = [Math.cos(angle0), Math.sin(angle0)];
var comp = Math.abs(Lib.dot(dvec, rvec) / Math.sqrt(Lib.dot(dvec, dvec)));
// mostly perpendicular motions rotate,
// mostly parallel motions re-range
if(!isNaN(comp)) {
moveFn2 = comp < 0.5 ? rotateMove : rerangeMove;
}
}
}
function doneFn() {
if(angle1 !== null) {
Plotly.relayout(gd, _this.id + '.radialaxis.angle', angle1);
} else if(rng1 !== null) {
Plotly.relayout(gd, _this.id + '.radialaxis.range[1]', rng1);
}
}
function rotateMove(dx, dy) {
var x1 = tx + dx;
var y1 = ty + dy;
angle1 = rad2deg(Math.atan2(cy - y1, x1 - cx));
var transform = strTranslate(cx, cy) + strRotate(-angle1);
layers['radial-axis'].attr('transform', transform);
layers['radial-line'].select('line').attr('transform', transform);
var fullLayoutNow = _this.gd._fullLayout;
var polarLayoutNow = fullLayoutNow[_this.id];
_this.updateRadialAxisTitle(fullLayoutNow, polarLayoutNow, angle1);
}
function rerangeMove(dx, dy) {
// project (dx, dy) unto unit radial axis vector
var dr = Lib.dot([dx, -dy], [Math.cos(angle0), Math.sin(angle0)]);
var rprime = range0[1] - drange * dr / radius * 0.75;
// make sure new range[1] does not change the range[0] -> range[1] sign
if((drange > 0) !== (rprime > range0[0])) return;
rng1 = radialAxis.range[1] = rprime;
Axes.doTicks(gd, _this.radialAxis, true);
layers['radial-grid']
.attr('transform', strTranslate(cx, cy))
.selectAll('path').attr('transform', null);
var rSpan = rng1 - range0[0];
var sectorBBox = _this.sectorBBox;
_this.xaxis.range = [sectorBBox[0] * rSpan, sectorBBox[2] * rSpan];
_this.yaxis.range = [sectorBBox[1] * rSpan, sectorBBox[3] * rSpan];
_this.xaxis.setScale();
_this.yaxis.setScale();
for(var k in _this.traceHash) {
var moduleCalcData = _this.traceHash[k];
var moduleCalcDataVisible = Lib.filterVisible(moduleCalcData);
var _module = moduleCalcData[0][0].trace._module;
var polarLayoutNow = gd._fullLayout[_this.id];
_module.plot(gd, _this, moduleCalcDataVisible, polarLayoutNow);
if(!Registry.traceIs(k, 'gl')) {
for(var i = 0; i < moduleCalcDataVisible.length; i++) {
_module.style(gd, moduleCalcDataVisible[i]);
}
}
}
}
dragOpts.prepFn = function() {
moveFn2 = null;
angle1 = null;
rng1 = null;
dragOpts.moveFn = moveFn;
dragOpts.doneFn = doneFn;
dragBox.clearSelect(fullLayout._zoomlayer);
};
dragOpts.clampFn = function(dx, dy) {
if(Math.sqrt(dx * dx + dy * dy) < constants.MINDRAG) {
dx = 0;
dy = 0;
}
return [dx, dy];
};
dragElement.init(dragOpts);
};
proto.updateAngularDrag = function(fullLayout, polarLayout) {
var _this = this;
var gd = _this.gd;
var layers = _this.layers;
var radius = _this.radius;
var cx = _this.cx;
var cy = _this.cy;
var cxx = _this.cxx;
var cyy = _this.cyy;
var sector = polarLayout.sector;
var dbs = constants.angularDragBoxSize;
var angularDrag = dragBox.makeDragger(layers, 'path', 'angulardrag', 'move');
var dragOpts = {element: angularDrag, gd: gd};
d3.select(angularDrag)
.attr('d', pathAnnulus(radius, radius + dbs, sector))
.attr('transform', strTranslate(cx, cy))
.call(setCursor, 'move');
function xy2a(x, y) {
return Math.atan2(cyy + dbs - y, x - cxx - dbs);
}
// scatter trace, points and textpoints selections
var scatterTraces = layers.frontplot.select('.scatterlayer').selectAll('.trace');
var scatterPoints = scatterTraces.selectAll('.point');
var scatterTextPoints = scatterTraces.selectAll('.textpoint');
// mouse px position at drag start (0), move (1)
var x0, y0;
// angular axis angle rotation at drag start (0), move (1)
var rot0, rot1;
// copy of polar sector value at drag start
var sector0;
// angle about circle center at drag start
var a0;
function moveFn(dx, dy) {
var x1 = x0 + dx;
var y1 = y0 + dy;
var a1 = xy2a(x1, y1);
var da = rad2deg(a1 - a0);
rot1 = rot0 + da;
layers.frontplot.attr('transform',
strTranslate(_this.xOffset2, _this.yOffset2) + strRotate([-da, cxx, cyy])
);
_this.clipPaths.circle.select('path').attr('transform',
strTranslate(cxx, cyy) + strRotate(da)
);
// 'un-rotate' marker and text points
scatterPoints.each(function() {
var sel = d3.select(this);
var xy = Drawing.getTranslate(sel);
sel.attr('transform', strTranslate(xy.x, xy.y) + strRotate([da]));
});
scatterTextPoints.each(function() {
var sel = d3.select(this);
var tx = sel.select('text');
var xy = Drawing.getTranslate(sel);
// N.B rotate -> translate ordering matters
sel.attr('transform', strRotate([da, tx.attr('x'), tx.attr('y')]) + strTranslate(xy.x, xy.y));
});
var angularAxis = _this.angularAxis;
angularAxis.rotation = wrap180(rot1);
if(angularAxis.type === 'linear' && !isFullCircle(sector)) {
angularAxis.range = sector0
.map(deg2rad)
.map(angularAxis.unTransformRad)
.map(rad2deg);
}
setConvertAngular(angularAxis);
Axes.doTicks(gd, angularAxis, true);
if(_this._hasClipOnAxisFalse && !isFullCircle(sector)) {
// mutate sector to trick isPtWithinSector
_this.sector = [sector0[0] - da, sector0[1] - da];
scatterTraces.call(Drawing.hideOutsideRangePoints, _this);
}
for(var k in _this.traceHash) {
if(Registry.traceIs(k, 'gl')) {
var moduleCalcData = _this.traceHash[k];
var moduleCalcDataVisible = Lib.filterVisible(moduleCalcData);
var _module = moduleCalcData[0][0].trace._module;
var polarLayoutNow = gd._fullLayout[_this.id];
_module.plot(gd, _this, moduleCalcDataVisible, polarLayoutNow);
}
}
}
function doneFn() {
scatterTextPoints.select('text').attr('transform', null);
var updateObj = {};
updateObj[_this.id + '.angularaxis.rotation'] = rot1;
Plotly.relayout(gd, updateObj);
}
dragOpts.prepFn = function(evt, startX, startY) {
var polarLayoutNow = fullLayout[_this.id];
sector0 = polarLayoutNow.sector.slice();
rot0 = polarLayoutNow.angularaxis.rotation;
var bbox = angularDrag.getBoundingClientRect();
x0 = startX - bbox.left;
y0 = startY - bbox.top;
a0 = xy2a(x0, y0);
dragOpts.moveFn = moveFn;
dragOpts.doneFn = doneFn;
dragBox.clearSelect(fullLayout._zoomlayer);
};
dragElement.init(dragOpts);
};