maxGraph/packages/html/stories/DynamicStyle.stories.js

125 lines
3.1 KiB
JavaScript

import mxgraph from '@mxgraph/core';
import { globalTypes } from '../.storybook/preview';
export default {
title: 'Styles/DynamicStyle',
argTypes: {
...globalTypes,
rubberBand: {
type: 'boolean',
defaultValue: true
}
}
};
const Template = ({ label, ...args }) => {
const {
mxGraph,
mxUtils,
mxConstants,
mxRubberband
} = mxgraph;
const container = document.createElement('div');
container.style.position = 'relative';
container.style.overflow = 'hidden';
container.style.width = `${args.width}px`;
container.style.height = `${args.height}px`;
container.style.background = 'url(/images/grid.gif)';
container.style.cursor = 'default';
// Creates the graph inside the given container
const graph = new mxGraph(container);
// Disables moving of edge labels in this examples
graph.edgeLabelsMovable = false;
// Enables rubberband selection
if (args.rubberBand)
new mxRubberband(graph);
// Needs to set a flag to check for dynamic style changes,
// that is, changes to styles on cells where the style was
// not explicitely changed using mxStyleChange
graph.getView().updateStyle = true;
// Overrides mxCell.getStyle to return a specific style
// for edges that reflects their target terminal (in this case
// the strokeColor will be equal to the target's fillColor).
const getStyle = function() {
// TODO super cannot be used here
// let style = super.getStyle();
let style;
if (this.isEdge()) {
const target = this.getTerminal(false);
if (target != null) {
const targetStyle = graph.getCurrentCellStyle(target);
const fill = mxUtils.getValue(
targetStyle,
'fillColor'
);
if (fill != null) {
style += `;strokeColor=${fill}`;
}
}
} else if (this.isVertex()) {
const geometry = this.getGeometry();
if (geometry != null && geometry.width > 80) {
style += ';fillColor=green';
}
}
return style;
};
// Gets the default parent for inserting new cells. This
// is normally the first child of the root (ie. layer 0).
const parent = graph.getDefaultParent();
// Adds cells to the model in a single step
graph.batchUpdate(() => {
const v1 = graph.insertVertex({
parent,
value: 'Hello,',
position: [20, 20],
size: [80, 30],
style: 'fillColor=green',
});
v1.getStyle = getStyle;
const v2 = graph.insertVertex({
parent,
value: 'World!',
position: [200, 150],
size: [80, 30],
style: 'fillColor=blue',
});
v2.getStyle = getStyle;
const v3 = graph.insertVertex({
parent,
value: 'World!',
position: [20, 150],
size: [80, 30],
style: 'fillColor=red',
});
v3.getStyle = getStyle;
const e1 = graph.insertEdge({
parent,
value: 'Connect',
source: v1,
target: v2,
style: 'perimeterSpacing=4;strokeWidth=4;labelBackgroundColor=white;fontStyle=1',
});
e1.getStyle = getStyle;
});
return container;
}
export const Default = Template.bind({});