135 lines
4.1 KiB
JavaScript
135 lines
4.1 KiB
JavaScript
/*
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Copyright 2021-present The maxGraph project Contributors
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Copyright (c) 2006-2020, JGraph Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import { Graph, CylinderShape, constants, CellRenderer } from '@maxgraph/core';
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import { globalTypes } from '../.storybook/preview';
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export default {
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title: 'Shapes/Shape',
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argTypes: {
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...globalTypes,
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},
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};
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const Template = ({ label, ...args }) => {
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const container = document.createElement('div');
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container.style.position = 'relative';
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container.style.overflow = 'hidden';
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container.style.width = `${args.width}px`;
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container.style.height = `${args.height}px`;
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container.style.background = 'url(/images/grid.gif)';
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container.style.cursor = 'default';
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/*
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The example shape is a "3D box" that looks like this:
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____
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/ /|
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/___/ |
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| | /
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|___|/
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The code below defines the shape. The BoxShape function
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it the constructor which creates a new object instance.
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The next lines use an CylinderShape instance to augment the
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prototype of the shape ("inheritance") and reset the
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constructor to the topmost function of the c'tor chain.
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*/
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class BoxShape extends CylinderShape {
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// Defines the extrusion of the box as a "static class variable"
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extrude = 10;
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/*
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Next, the CylinderShape's redrawPath method is "overridden".
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This method has a isForeground argument to separate two
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paths, one for the background (which must be closed and
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might be filled) and one for the foreground, which is
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just a stroke.
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Foreground: /
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_____/
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____
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Background: / |
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/ |
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| /
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|____/
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*/
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redrawPath(path, x, y, w, h, isForeground) {
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const dy = this.extrude * this.scale;
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const dx = this.extrude * this.scale;
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if (isForeground) {
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path.moveTo(0, dy);
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path.lineTo(w - dx, dy);
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path.lineTo(w, 0);
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path.moveTo(w - dx, dy);
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path.lineTo(w - dx, h);
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} else {
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path.moveTo(0, dy);
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path.lineTo(dx, 0);
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path.lineTo(w, 0);
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path.lineTo(w, h - dy);
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path.lineTo(w - dx, h);
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path.lineTo(0, h);
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path.lineTo(0, dy);
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path.lineTo(dx, 0);
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path.close();
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}
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}
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}
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CellRenderer.registerShape('box', BoxShape);
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// Creates the graph inside the DOM node.
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const graph = new Graph(container);
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// Disables basic selection and cell handling
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graph.setEnabled(false);
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// Changes the default style for vertices "in-place"
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// to use the custom shape.
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const style = graph.getStylesheet().getDefaultVertexStyle();
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style.shape = 'box';
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// Adds a spacing for the label that matches the
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// extrusion size
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style.spacingTop = BoxShape.prototype.extrude;
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style.spacingRight = BoxShape.prototype.extrude;
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// Adds a gradient and shadow to improve the user experience
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style.gradientColor = '#FFFFFF';
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style.shadow = true;
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// Gets the default parent for inserting new cells. This
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// is normally the first child of the root (ie. layer 0).
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const parent = graph.getDefaultParent();
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// Adds cells to the model in a single step
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graph.batchUpdate(() => {
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const v1 = graph.insertVertex(parent, null, 'Custom', 20, 20, 80, 60);
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const v2 = graph.insertVertex(parent, null, 'Shape', 200, 150, 80, 60);
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const e1 = graph.insertEdge(parent, null, '', v1, v2);
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});
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return container;
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};
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export const Default = Template.bind({});
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