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73 lines
2.5 KiB
73 lines
2.5 KiB
/*
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* Copyright (C) 1998-2019 by Northwoods Software Corporation. All Rights Reserved.
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*/
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import * as go from '../release/go';
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// HTML + JavaScript text editor using an HTML Select Element and HTMLInfo.
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// This file exposes one instance of HTMLInfo, window.TextEditorSelectBox
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// see /samples/customTextEditingTool.html
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// see also textEditorRadioButton.js for another custom editor
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// see also textEditor.html for a re-implementation of the default text editor
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((window: any) => {
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const customEditor = new go.HTMLInfo();
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const customSelectBox = document.createElement('select');
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customEditor.show = (textBlock, diagram, tool) => {
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if (!(textBlock instanceof go.TextBlock)) return;
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// Populate the select box:
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customSelectBox.innerHTML = '';
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let list = textBlock.choices;
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// Perhaps give some default choices if textBlock.choices is null
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if (list === null) list = ['Default A', 'Default B', 'Default C'];
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const l = list.length;
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for (let i = 0; i < l; i++) {
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const op = document.createElement('option');
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op.text = list[i];
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op.value = list[i];
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customSelectBox.add(op);
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// consider also adding the current value, if it is not in the choices list
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}
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// After the list is populated, set the value:
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customSelectBox.value = textBlock.text;
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// Do a few different things when a user presses a key
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customSelectBox.addEventListener('keydown', (e) => {
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const keynum = e.which;
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if (keynum === 13) { // Accept on Enter
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(tool as any).acceptText(go.TextEditingTool.Enter);
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return;
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} else if (keynum === 9) { // Accept on Tab
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(tool as any).acceptText(go.TextEditingTool.Tab);
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e.preventDefault();
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return false;
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} else if (keynum === 27) { // Cancel on Esc
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tool.doCancel();
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if (tool.diagram) tool.diagram.focus();
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}
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}, false);
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const loc = textBlock.getDocumentPoint(go.Spot.TopLeft);
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const pos = diagram.transformDocToView(loc);
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customSelectBox.style.left = pos.x + 'px';
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customSelectBox.style.top = pos.y + 'px';
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customSelectBox.style.position = 'absolute';
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customSelectBox.style.zIndex = (100).toString(); // place it in front of the Diagram
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if (diagram.div !== null) diagram.div.appendChild(customSelectBox);
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};
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customEditor.hide = (diagram, tool) => {
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if (diagram.div !== null) diagram.div.removeChild(customSelectBox);
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};
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customEditor.valueFunction = () => customSelectBox.value;
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window.TextEditorSelectBox = customEditor;
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})(window);
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