| Simon Hunt | 1a9eff9 | 2014-11-07 11:06:34 -0800 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2014 Open Networking Laboratory |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | /* |
| 18 | Utility functions for D3 visualizations. |
| 19 | |
| 20 | @author Simon Hunt |
| 21 | */ |
| 22 | |
| 23 | (function (onos) { |
| 24 | 'use strict'; |
| 25 | |
| 26 | function createDragBehavior(force, selectCb, atDragEnd) { |
| 27 | var draggedThreshold = d3.scale.linear() |
| 28 | .domain([0, 0.1]) |
| 29 | .range([5, 20]) |
| 30 | .clamp(true), |
| 31 | drag; |
| 32 | |
| 33 | // TODO: better validation of parameters |
| 34 | if (!$.isFunction(selectCb)) { |
| 35 | alert('d3util.createDragBehavior(): selectCb is not a function') |
| 36 | } |
| 37 | if (!$.isFunction(atDragEnd)) { |
| 38 | alert('d3util.createDragBehavior(): atDragEnd is not a function') |
| 39 | } |
| 40 | |
| 41 | function dragged(d) { |
| 42 | var threshold = draggedThreshold(force.alpha()), |
| 43 | dx = d.oldX - d.px, |
| 44 | dy = d.oldY - d.py; |
| 45 | if (Math.abs(dx) >= threshold || Math.abs(dy) >= threshold) { |
| 46 | d.dragged = true; |
| 47 | } |
| 48 | return d.dragged; |
| 49 | } |
| 50 | |
| 51 | drag = d3.behavior.drag() |
| 52 | .origin(function(d) { return d; }) |
| 53 | .on('dragstart', function(d) { |
| 54 | d.oldX = d.x; |
| 55 | d.oldY = d.y; |
| 56 | d.dragged = false; |
| 57 | d.fixed |= 2; |
| 58 | }) |
| 59 | .on('drag', function(d) { |
| 60 | d.px = d3.event.x; |
| 61 | d.py = d3.event.y; |
| 62 | if (dragged(d)) { |
| 63 | if (!force.alpha()) { |
| 64 | force.alpha(.025); |
| 65 | } |
| 66 | } |
| 67 | }) |
| 68 | .on('dragend', function(d) { |
| 69 | if (!dragged(d)) { |
| 70 | // consider this the same as a 'click' (selection of node) |
| 71 | selectCb(d, this); // TODO: set 'this' context instead of param |
| 72 | } |
| 73 | d.fixed &= ~6; |
| 74 | |
| 75 | // hook at the end of a drag gesture |
| 76 | atDragEnd(d, this); // TODO: set 'this' context instead of param |
| 77 | }); |
| 78 | |
| 79 | return drag; |
| 80 | } |
| 81 | |
| 82 | function appendGlow(svg) { |
| 83 | // TODO: parameterize color |
| 84 | |
| 85 | var glow = svg.append('filter') |
| 86 | .attr('x', '-50%') |
| 87 | .attr('y', '-50%') |
| 88 | .attr('width', '200%') |
| 89 | .attr('height', '200%') |
| 90 | .attr('id', 'blue-glow'); |
| 91 | |
| 92 | glow.append('feColorMatrix') |
| 93 | .attr('type', 'matrix') |
| 94 | .attr('values', '0 0 0 0 0 ' + |
| 95 | '0 0 0 0 0 ' + |
| 96 | '0 0 0 0 .7 ' + |
| 97 | '0 0 0 1 0 '); |
| 98 | |
| 99 | glow.append('feGaussianBlur') |
| 100 | .attr('stdDeviation', 3) |
| 101 | .attr('result', 'coloredBlur'); |
| 102 | |
| 103 | glow.append('feMerge').selectAll('feMergeNode') |
| 104 | .data(['coloredBlur', 'SourceGraphic']) |
| 105 | .enter().append('feMergeNode') |
| 106 | .attr('in', String); |
| 107 | } |
| 108 | |
| 109 | // === register the functions as a library |
| 110 | onos.ui.addLib('d3util', { |
| 111 | createDragBehavior: createDragBehavior, |
| 112 | appendGlow: appendGlow |
| 113 | }); |
| 114 | |
| 115 | }(ONOS)); |