Begin work on an image history tree view
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Joseph Schorr
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d7ea1944e3
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9 changed files with 664 additions and 17 deletions
280
static/lib/d3-tip.js
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280
static/lib/d3-tip.js
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// d3.tip
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// Copyright (c) 2013 Justin Palmer
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//
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// Tooltips for d3.js SVG visualizations
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// Public - contructs a new tooltip
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//
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// Returns a tip
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d3.tip = function() {
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var direction = d3_tip_direction,
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offset = d3_tip_offset,
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html = d3_tip_html,
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node = initNode(),
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svg = null,
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point = null
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function tip(vis) {
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svg = getSVGNode(vis)
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point = svg.createSVGPoint()
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document.body.appendChild(node)
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}
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// Public - show the tooltip on the screen
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//
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// Returns a tip
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tip.show = function() {
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var content = html.apply(this, arguments),
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poffset = offset.apply(this, arguments),
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dir = direction.apply(this, arguments),
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nodel = d3.select(node), i = 0,
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coords
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nodel.html(content)
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.style({ opacity: 1, 'pointer-events': 'all' })
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while(i--) nodel.classed(directions[i], false)
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coords = direction_callbacks.get(dir).apply(this)
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nodel.classed(dir, true).style({
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top: (coords.top + poffset[0]) + 'px',
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left: (coords.left + poffset[1]) + 'px'
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})
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return tip
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}
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// Public - hide the tooltip
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//
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// Returns a tip
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tip.hide = function() {
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nodel = d3.select(node)
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nodel.style({ opacity: 0, 'pointer-events': 'none' })
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return tip
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}
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// Public: Proxy attr calls to the d3 tip container. Sets or gets attribute value.
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//
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// n - name of the attribute
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// v - value of the attribute
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//
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// Returns tip or attribute value
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tip.attr = function(n, v) {
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if (arguments.length < 2 && typeof n === 'string') {
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return d3.select(node).attr(n)
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} else {
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var args = Array.prototype.slice.call(arguments)
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d3.selection.prototype.attr.apply(d3.select(node), args)
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}
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return tip
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}
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// Public: Proxy style calls to the d3 tip container. Sets or gets a style value.
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//
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// n - name of the property
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// v - value of the property
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//
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// Returns tip or style property value
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tip.style = function(n, v) {
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if (arguments.length < 2 && typeof n === 'string') {
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return d3.select(node).style(n)
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} else {
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var args = Array.prototype.slice.call(arguments)
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d3.selection.prototype.style.apply(d3.select(node), args)
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}
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return tip
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}
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// Public: Set or get the direction of the tooltip
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//
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// v - One of n(north), s(south), e(east), or w(west), nw(northwest),
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// sw(southwest), ne(northeast) or se(southeast)
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//
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// Returns tip or direction
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tip.direction = function(v) {
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if (!arguments.length) return direction
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direction = v == null ? v : d3.functor(v)
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return tip
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}
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// Public: Sets or gets the offset of the tip
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//
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// v - Array of [x, y] offset
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//
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// Returns offset or
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tip.offset = function(v) {
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if (!arguments.length) return offset
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offset = v == null ? v : d3.functor(v)
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return tip
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}
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// Public: sets or gets the html value of the tooltip
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//
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// v - String value of the tip
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//
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// Returns html value or tip
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tip.html = function(v) {
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if (!arguments.length) return html
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html = v == null ? v : d3.functor(v)
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return tip
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}
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function d3_tip_direction() { return 'n' }
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function d3_tip_offset() { return [0, 0] }
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function d3_tip_html() { return ' ' }
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var direction_callbacks = d3.map({
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n: direction_n,
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s: direction_s,
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e: direction_e,
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w: direction_w,
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nw: direction_nw,
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ne: direction_ne,
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sw: direction_sw,
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se: direction_se
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}),
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directions = direction_callbacks.keys()
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function direction_n() {
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var bbox = getScreenBBox()
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return {
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top: bbox.n.y - node.offsetHeight,
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left: bbox.n.x - node.offsetWidth / 2
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}
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}
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function direction_s() {
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var bbox = getScreenBBox()
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return {
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top: bbox.s.y,
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left: bbox.s.x - node.offsetWidth / 2
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}
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}
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function direction_e() {
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var bbox = getScreenBBox()
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return {
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top: bbox.e.y - node.offsetHeight / 2,
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left: bbox.e.x
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}
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}
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function direction_w() {
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var bbox = getScreenBBox()
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return {
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top: bbox.w.y - node.offsetHeight / 2,
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left: bbox.w.x - node.offsetWidth
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}
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}
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function direction_nw() {
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var bbox = getScreenBBox()
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return {
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top: bbox.nw.y - node.offsetHeight,
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left: bbox.nw.x - node.offsetWidth
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}
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}
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function direction_ne() {
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var bbox = getScreenBBox()
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return {
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top: bbox.ne.y - node.offsetHeight,
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left: bbox.ne.x
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}
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}
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function direction_sw() {
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var bbox = getScreenBBox()
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return {
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top: bbox.sw.y,
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left: bbox.sw.x - node.offsetWidth
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}
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}
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function direction_se() {
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var bbox = getScreenBBox()
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return {
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top: bbox.se.y,
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left: bbox.e.x
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}
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}
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function initNode() {
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var node = d3.select(document.createElement('div'))
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node.style({
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position: 'absolute',
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opacity: 0,
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pointerEvents: 'none',
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boxSizing: 'border-box'
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})
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return node.node()
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}
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function getSVGNode(el) {
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el = el.node()
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if(el.tagName.toLowerCase() == 'svg')
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return el
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return el.ownerSVGElement
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}
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// Private - gets the screen coordinates of a shape
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//
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// Given a shape on the screen, will return an SVGPoint for the directions
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// n(north), s(south), e(east), w(west), ne(northeast), se(southeast), nw(northwest),
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// sw(southwest).
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//
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// +-+-+
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// | |
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// + +
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// | |
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// +-+-+
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//
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// Returns an Object {n, s, e, w, nw, sw, ne, se}
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function getScreenBBox() {
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var target = d3.event.target,
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bbox = {},
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matrix = target.getScreenCTM(),
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tbbox = target.getBBox(),
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width = tbbox.width,
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height = tbbox.height,
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x = tbbox.x,
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y = tbbox.y,
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scrollTop = document.body.scrollTop,
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scrollLeft = document.body.scrollLeft
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if(document.documentElement && document.documentElement.scrollTop) {
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scrollTop = document.documentElement.scrollTop
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scrollLeft = document.documentElement.scrollLeft
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}
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point.x = x + scrollLeft
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point.y = y + scrollTop
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bbox.nw = point.matrixTransform(matrix)
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point.x += width
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bbox.ne = point.matrixTransform(matrix)
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point.y += height
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bbox.se = point.matrixTransform(matrix)
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point.x -= width
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bbox.sw = point.matrixTransform(matrix)
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point.y -= height / 2
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bbox.w = point.matrixTransform(matrix)
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point.x += width
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bbox.e = point.matrixTransform(matrix)
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point.x -= width / 2
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point.y -= height / 2
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bbox.n = point.matrixTransform(matrix)
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point.y += height
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bbox.s = point.matrixTransform(matrix)
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return bbox
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}
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return tip
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};
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