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 | 1× 1× 1× 1× 52× 129× 254× 52× 52× 52× 52× 34× 52× 52× 254× 52× 52× 52× 52× 254× 77× 77× 77× 77× 77× 77× 77× 77× 77× 77× 254× 35× 35× 35× 35× 35× 35× 1× 34× 34× 34× 34× 254× 52× 52× 52× 52× 52× 254× 1× 52× 52× 65× 102× 65× | import { assign, filter, groupBy, isObject } from 'min-dash'; var LOW_PRIORITY = 500, MEDIUM_PRIORITY = 1250, HIGH_PRIORITY = 1500; import { getOriginal as getOriginalEvent } from '../../util/Event'; var round = Math.round; function mid(element) { return { x: element.x + round(element.width / 2), y: element.y + round(element.height / 2) }; } /** * A plugin that makes shapes draggable / droppable. * * @param {EventBus} eventBus * @param {Dragging} dragging * @param {Modeling} modeling * @param {Selection} selection * @param {Rules} rules */ export default function MoveEvents( eventBus, dragging, modeling, selection, rules) { // rules function canMove(shapes, delta, position, target) { return rules.allowed('elements.move', { shapes: shapes, delta: delta, position: position, target: target }); } // move events // assign a high priority to this handler to setup the environment // others may hook up later, e.g. at default priority and modify // the move environment. // // This sets up the context with // // * shape: the primary shape being moved // * shapes: a list of shapes to be moved // * validatedShapes: a list of shapes that are being checked // against the rules before and during move // eventBus.on('shape.move.start', HIGH_PRIORITY, function(event) { var context = event.context, shape = event.shape, shapes = selection.get().slice(); // move only single shape if the dragged element // is not part of the current selection if (shapes.indexOf(shape) === -1) { shapes = [ shape ]; } // ensure we remove nested elements in the collection // and add attachers for a proper dragger shapes = removeNested(shapes); // attach shapes to drag context assign(context, { shapes: shapes, validatedShapes: shapes, shape: shape }); }); // assign a high priority to this handler to setup the environment // others may hook up later, e.g. at default priority and modify // the move environment // eventBus.on('shape.move.start', MEDIUM_PRIORITY, function(event) { var context = event.context, validatedShapes = context.validatedShapes, canExecute; canExecute = context.canExecute = canMove(validatedShapes); // check if we can move the elements Iif (!canExecute) { return false; } }); // assign a low priority to this handler // to let others modify the move event before we update // the context // eventBus.on('shape.move.move', LOW_PRIORITY, function(event) { var context = event.context, validatedShapes = context.validatedShapes, hover = event.hover, delta = { x: event.dx, y: event.dy }, position = { x: event.x, y: event.y }, canExecute; // check if we can move the elements canExecute = canMove(validatedShapes, delta, position, hover); context.delta = delta; context.canExecute = canExecute; // simply ignore move over Iif (canExecute === null) { context.target = null; return; } context.target = hover; }); eventBus.on('shape.move.end', function(event) { var context = event.context; var delta = context.delta, canExecute = context.canExecute, isAttach = canExecute === 'attach', shapes = context.shapes; if (canExecute === false) { return false; } // ensure we have actual pixel values deltas // (important when zoom level was > 1 during move) delta.x = round(delta.x); delta.y = round(delta.y); Iif (delta.x === 0 && delta.y === 0) { // didn't move return; } modeling.moveElements(shapes, delta, context.target, { primaryShape: context.shape, attach: isAttach }); }); // move activation eventBus.on('element.mousedown', function(event) { var originalEvent = getOriginalEvent(event); if (!originalEvent) { throw new Error('must supply DOM mousedown event'); } return start(originalEvent, event.element); }); /** * Start move. * * @param {MouseEvent} event * @param {djs.model.Shape} shape * @param {boolean} [activate] * @param {Object} [context] */ function start(event, element, activate, context) { Iif (isObject(activate)) { context = activate; activate = false; } // do not move connections or the root element Iif (element.waypoints || !element.parent) { return; } var referencePoint = mid(element); dragging.init(event, referencePoint, 'shape.move', { cursor: 'grabbing', autoActivate: activate, data: { shape: element, context: context || {} } }); // we've handled the event return true; } // API this.start = start; } MoveEvents.$inject = [ 'eventBus', 'dragging', 'modeling', 'selection', 'rules' ]; /** * Return a filtered list of elements that do not contain * those nested into others. * * @param {Array<djs.model.Base>} elements * * @return {Array<djs.model.Base>} filtered */ function removeNested(elements) { var ids = groupBy(elements, 'id'); return filter(elements, function(element) { while ((element = element.parent)) { // parent in selection Iif (ids[element.id]) { return false; } } return true; }); } |