1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 | 1× 71× 71× 71× 71× 71× 71× 71× 71× 71× 71× 71× 1× 1× 1× 2× 1× 1× 2× 2× 1× 2× 2× | import { values } from 'min-dash'; import { getEnclosedElements } from '../../util/Elements'; import { hasSecondaryModifier } from '../../util/Mouse'; import { append as svgAppend, attr as svgAttr, create as svgCreate, remove as svgRemove } from 'tiny-svg'; var LASSO_TOOL_CURSOR = 'crosshair'; export default function LassoTool( eventBus, canvas, dragging, elementRegistry, selection, toolManager) { this._selection = selection; this._dragging = dragging; var self = this; // lasso visuals implementation /** * A helper that realizes the selection box visual */ var visuals = { create: function(context) { var container = canvas.getDefaultLayer(), frame; frame = context.frame = svgCreate('rect'); svgAttr(frame, { class: 'djs-lasso-overlay', width: 1, height: 1, x: 0, y: 0 }); svgAppend(container, frame); }, update: function(context) { var frame = context.frame, bbox = context.bbox; svgAttr(frame, { x: bbox.x, y: bbox.y, width: bbox.width, height: bbox.height }); }, remove: function(context) { if (context.frame) { svgRemove(context.frame); } } }; toolManager.registerTool('lasso', { tool: 'lasso.selection', dragging: 'lasso' }); eventBus.on('lasso.selection.end', function(event) { var target = event.originalEvent.target; // only reactive on diagram click // on some occasions, event.hover is not set and we have to check if the target is an svg if (!event.hover && !(target instanceof SVGElement)) { return; } eventBus.once('lasso.selection.ended', function() { self.activateLasso(event.originalEvent, true); }); }); // lasso interaction implementation eventBus.on('lasso.end', function(event) { var bbox = toBBox(event); var elements = elementRegistry.filter(function(element) { return element; }); self.select(elements, bbox); }); eventBus.on('lasso.start', function(event) { var context = event.context; context.bbox = toBBox(event); visuals.create(context); }); eventBus.on('lasso.move', function(event) { var context = event.context; context.bbox = toBBox(event); visuals.update(context); }); eventBus.on('lasso.cleanup', function(event) { var context = event.context; visuals.remove(context); }); // event integration eventBus.on('element.mousedown', 1500, function(event) { if (hasSecondaryModifier(event)) { self.activateLasso(event.originalEvent); // we've handled the event return true; } }); } LassoTool.$inject = [ 'eventBus', 'canvas', 'dragging', 'elementRegistry', 'selection', 'toolManager' ]; LassoTool.prototype.activateLasso = function(event, autoActivate) { this._dragging.init(event, 'lasso', { autoActivate: autoActivate, cursor: LASSO_TOOL_CURSOR, data: { context: {} } }); }; LassoTool.prototype.activateSelection = function(event) { this._dragging.init(event, 'lasso.selection', { trapClick: false, cursor: LASSO_TOOL_CURSOR, data: { context: {} } }); }; LassoTool.prototype.select = function(elements, bbox) { var selectedElements = getEnclosedElements(elements, bbox); this._selection.select(values(selectedElements)); }; LassoTool.prototype.toggle = function() { Iif (this.isActive()) { this._dragging.cancel(); } else { this.activateSelection(); } }; LassoTool.prototype.isActive = function() { var context = this._dragging.context(); return context && /^lasso/.test(context.prefix); }; function toBBox(event) { var start = { x: event.x - event.dx, y: event.y - event.dy }; var end = { x: event.x, y: event.y }; var bbox; if ((start.x <= end.x && start.y < end.y) || (start.x < end.x && start.y <= end.y)) { bbox = { x: start.x, y: start.y, width: end.x - start.x, height: end.y - start.y }; } else if ((start.x >= end.x && start.y < end.y) || (start.x > end.x && start.y <= end.y)) { bbox = { x: end.x, y: start.y, width: start.x - end.x, height: end.y - start.y }; } else if ((start.x <= end.x && start.y > end.y) || (start.x < end.x && start.y >= end.y)) { bbox = { x: start.x, y: end.y, width: end.x - start.x, height: start.y - end.y }; } else if ((start.x >= end.x && start.y > end.y) || (start.x > end.x && start.y >= end.y)) { bbox = { x: end.x, y: end.y, width: start.x - end.x, height: start.y - end.y }; } else { bbox = { x: end.x, y: end.y, width: 0, height: 0 }; } return bbox; } |