140 lines
4.0 KiB
JavaScript
140 lines
4.0 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, constants, RubberBandHandler, cloneUtils } from '@maxgraph/core';
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import { globalTypes } from '../.storybook/preview';
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export default {
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title: 'Styles/HoverStyle',
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argTypes: {
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...globalTypes,
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rubberBand: {
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type: 'boolean',
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defaultValue: true,
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},
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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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// Creates the graph inside the given container
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const graph = new Graph(container);
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function updateStyle(state, hover) {
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if (hover) {
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state.style.fillColor = '#ff0000';
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}
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// Sets rounded style for both cases since the rounded style
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// is not set in the default style and is therefore inherited
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// once it is set, whereas the above overrides the default value
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state.style.rounded = hover ? '1' : '0';
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state.style.strokeWidth = hover ? '4' : '1';
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state.style.fontStyle = hover ? constants.FONT.BOLD : '0';
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}
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// Changes fill color to red on mouseover
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graph.addMouseListener({
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currentState: null,
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previousStyle: null,
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mouseDown(sender, me) {
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if (this.currentState != null) {
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this.dragLeave(me.getEvent(), this.currentState);
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this.currentState = null;
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}
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},
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mouseMove(sender, me) {
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if (this.currentState != null && me.getState() == this.currentState) {
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return;
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}
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let tmp = graph.view.getState(me.getCell());
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// Ignores everything but vertices
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if (graph.isMouseDown || (tmp != null && !tmp.cell.isVertex())) {
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tmp = null;
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}
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if (tmp != this.currentState) {
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if (this.currentState != null) {
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this.dragLeave(me.getEvent(), this.currentState);
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}
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this.currentState = tmp;
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if (this.currentState != null) {
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this.dragEnter(me.getEvent(), this.currentState);
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}
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}
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},
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mouseUp(sender, me) {},
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dragEnter(evt, state) {
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if (state != null) {
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this.previousStyle = state.style;
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state.style = cloneUtils.clone(state.style);
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updateStyle(state, true);
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state.shape.apply(state);
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state.shape.redraw();
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if (state.text != null) {
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state.text.apply(state);
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state.text.redraw();
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}
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}
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},
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dragLeave(evt, state) {
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if (state != null) {
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state.style = this.previousStyle;
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updateStyle(state, false);
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state.shape.apply(state);
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state.shape.redraw();
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if (state.text != null) {
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state.text.apply(state);
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state.text.redraw();
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}
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}
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},
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});
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// Enables rubberband selection
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if (args.rubberBand) new RubberBandHandler(graph);
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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, 'Hello,', 20, 20, 80, 30);
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const v2 = graph.insertVertex(parent, null, 'World!', 200, 150, 80, 30);
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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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