2022-01-18 07:46:56 +00:00
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// @ts-check
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2021-03-24 22:54:38 +00:00
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/**
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* Copyright (c) 2006-2013, JGraph Ltd
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2022-01-18 07:46:56 +00:00
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*
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* HTML label
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*
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* This example demonstrates using
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* HTML labels that are connected to the state of the user object.
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2021-03-24 22:54:38 +00:00
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*/
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import React from 'react';
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import mxEvent from '../mxgraph/util/mxEvent';
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import mxGraph from '../mxgraph/view/mxGraph';
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import mxRubberband from '../mxgraph/handler/mxRubberband';
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2022-01-18 07:46:56 +00:00
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const HTML_TEMPLATE = `
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2021-03-24 22:54:38 +00:00
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<!-- Page passes the container for the graph to the program -->
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<body onload="main(document.getElementById('graphContainer'))">
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<!-- Creates a container for the graph with a grid wallpaper -->
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<div id="graphContainer"
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style="position:relative;overflow:hidden;width:321px;height:241px;background:url('editors/images/grid.gif');cursor:default;">
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</div>
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</body>
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2022-01-18 07:46:56 +00:00
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`
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// Disables the built-in context menu
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mxEvent.disableContextMenu(container);
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// Creates the graph inside the given container
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let graph = new mxGraph(container);
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// Enables HTML labels
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graph.setHtmlLabels(true);
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// Enables rubberband selection
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new mxRubberband(graph);
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// Creates a user object that stores the state
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let doc = mxUtils.createXmlDocument();
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let obj = doc.createElement('UserObject');
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obj.setAttribute('label', 'Hello, World!');
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obj.setAttribute('checked', 'false');
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// Adds optional caching for the HTML label
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let cached = true;
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if (cached) {
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// Ignores cached label in codec
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CodecRegistry.getCodec(mxCell).exclude.push('div');
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// Invalidates cached labels
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graph.model.setValue = function(cell, value) {
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cell.div = null;
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mxGraphModel.prototype.setValue.apply(this, arguments);
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};
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}
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// Overrides method to provide a cell label in the display
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graph.convertValueToString = function(cell) {
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if (cached && cell.div != null) {
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// Uses cached label
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return cell.div;
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} else if (mxUtils.isNode(cell.value) && cell.value.nodeName.toLowerCase() == 'userobject') {
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// Returns a DOM for the label
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let div = document.createElement('div');
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div.innerHTML = cell.getAttribute('label');
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mxUtils.br(div);
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let checkbox = document.createElement('input');
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checkbox.setAttribute('type', 'checkbox');
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if (cell.getAttribute('checked') == 'true') {
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checkbox.setAttribute('checked', 'checked');
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checkbox.defaultChecked = true;
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}
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// Writes back to cell if checkbox is clicked
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mxEvent.addListener(checkbox, 'change', function(evt) {
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let elt = cell.value.cloneNode(true);
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elt.setAttribute('checked', (checkbox.checked) ? 'true' : 'false');
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graph.model.setValue(cell, elt);
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});
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div.appendChild(checkbox);
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if (cached) {
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// Caches label
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cell.div = div;
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}
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return div;
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}
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return '';
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};
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// Overrides method to store a cell label in the model
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let cellLabelChanged = graph.cellLabelChanged;
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graph.cellLabelChanged = function(cell, newValue, autoSize) {
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if (mxUtils.isNode(cell.value) && cell.value.nodeName.toLowerCase() == 'userobject') {
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// Clones the value for correct undo/redo
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let elt = cell.value.cloneNode(true);
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elt.setAttribute('label', newValue);
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newValue = elt;
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}
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cellLabelChanged.apply(this, arguments);
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};
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// Overrides method to create the editing value
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let getEditingValue = graph.getEditingValue;
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graph.getEditingValue = function(cell) {
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if (mxUtils.isNode(cell.value) && cell.value.nodeName.toLowerCase() == 'userobject') {
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return cell.getAttribute('label');
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}
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};
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let parent = graph.getDefaultParent();
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graph.insertVertex(parent, null, obj, 20, 20, 80, 60);
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// Undo/redo
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let undoManager = new UndoManager();
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let listener = function(sender, evt) {
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undoManager.undoableEditHappened(evt.getProperty('edit'));
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};
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graph.getDataModel().addListener(mxEvent.UNDO, listener);
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graph.getView().addListener(mxEvent.UNDO, listener);
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document.body.appendChild(mxUtils.button('Undo', function() {
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undoManager.undo();
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}));
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document.body.appendChild(mxUtils.button('Redo', function() {
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undoManager.redo();
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}));
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