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 | 1× 51× 51× 51× 37× 37× 37× 37× 37× 37× 37× 18× 18× 18× 18× 16× 18× 15× 15× 15× 15× 14× 14× 51× 18× 51× 37× 37× 51× 15× 1× 45× 45× 45× 1× 18× 18× 12× 18× 18× 18× 18× 1× 16× 16× 16× 16× 16× 1× | import { pick, assign } from 'min-dash'; import { resizeBounds, ensureConstraints, computeChildrenBBox, getMinResizeBounds } from './ResizeUtil'; import { asTRBL, roundBounds } from '../../layout/LayoutUtil'; var DEFAULT_MIN_WIDTH = 10; /** * A component that provides resizing of shapes on the canvas. * * The following components are part of shape resize: * * * adding resize handles, * * creating a visual during resize * * checking resize rules * * committing a change once finished * * * ## Customizing * * It's possible to customize the resizing behaviour by intercepting 'resize.start' * and providing the following parameters through the 'context': * * * minDimensions ({ width, height }): minimum shape dimensions * * * childrenBoxPadding ({ left, top, bottom, right } || number): * gap between the minimum bounding box and the container * * f.ex: * * ```javascript * eventBus.on('resize.start', 1500, function(event) { * var context = event.context, * * context.minDimensions = { width: 140, height: 120 }; * * // Passing general padding * context.childrenBoxPadding = 30; * * // Passing padding to a specific side * context.childrenBoxPadding.left = 20; * }); * ``` */ export default function Resize(eventBus, rules, modeling, dragging) { this._dragging = dragging; this._rules = rules; var self = this; /** * Handle resize move by specified delta. * * @param {Object} context * @param {Point delta */ function handleMove(context, delta) { var shape = context.shape, direction = context.direction, resizeConstraints = context.resizeConstraints, newBounds; context.delta = delta; newBounds = resizeBounds(shape, direction, delta); // ensure constraints during resize context.newBounds = ensureConstraints(newBounds, resizeConstraints); // update + cache executable state context.canExecute = self.canResize(context); } /** * Handle resize start. * * @param {Object} context */ function handleStart(context) { var resizeConstraints = context.resizeConstraints, // evaluate minBounds for backwards compatibility minBounds = context.minBounds; Iif (resizeConstraints !== undefined) { return; } if (minBounds === undefined) { minBounds = self.computeMinResizeBox(context); } context.resizeConstraints = { min: asTRBL(minBounds) }; } /** * Handle resize end. * * @param {Object} context */ function handleEnd(context) { var shape = context.shape, canExecute = context.canExecute, newBounds = context.newBounds; if (canExecute) { // ensure we have actual pixel values for new bounds // (important when zoom level was > 1 during move) newBounds = roundBounds(newBounds); // perform the actual resize modeling.resizeShape(shape, newBounds); } } eventBus.on('resize.start', function(event) { handleStart(event.context); }); eventBus.on('resize.move', function(event) { var delta = { x: event.dx, y: event.dy }; handleMove(event.context, delta); }); eventBus.on('resize.end', function(event) { handleEnd(event.context); }); } Resize.prototype.canResize = function(context) { var rules = this._rules; var ctx = pick(context, [ 'newBounds', 'shape', 'delta', 'direction' ]); return rules.allowed('shape.resize', ctx); }; /** * Activate a resize operation. * * You may specify additional contextual information and must specify a * resize direction during activation of the resize event. * * @param {MouseEvent} event * @param {djs.model.Shape} shape * @param {Object|String} contextOrDirection */ Resize.prototype.activate = function(event, shape, contextOrDirection) { var dragging = this._dragging, context, direction; if (typeof contextOrDirection === 'string') { contextOrDirection = { direction: contextOrDirection }; } context = assign({ shape: shape }, contextOrDirection); direction = context.direction; Iif (!direction) { throw new Error('must provide a direction (nw|se|ne|sw)'); } dragging.init(event, 'resize', { autoActivate: true, cursor: 'resize-' + (/nw|se/.test(direction) ? 'nwse' : 'nesw'), data: { shape: shape, context: context } }); }; Resize.prototype.computeMinResizeBox = function(context) { var shape = context.shape, direction = context.direction, minDimensions, childrenBounds; minDimensions = context.minDimensions || { width: DEFAULT_MIN_WIDTH, height: DEFAULT_MIN_WIDTH }; // get children bounds childrenBounds = computeChildrenBBox(shape, context.childrenBoxPadding); // get correct minimum bounds from given resize direction // basically ensures that the minBounds is max(childrenBounds, minDimensions) return getMinResizeBounds(direction, shape, minDimensions, childrenBounds); }; Resize.$inject = [ 'eventBus', 'rules', 'modeling', 'dragging' ]; |