webc/paramlist2.html at master · jszeman/webc · GitHub

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<!DOCTYPE html>
<head>
    <style>
        table, td, th {
            border: 1px solid lightgray;
            border-collapse: collapse;
        }

        td, th {
            padding: 4px;
        }

    </style>
    <script>
        class Paramlist extends HTMLElement {

            constructor()
            {
                super();
                this._values = [];
                this.change_list = [];
                this.input_nodes = [];
            }

            render(names, header)
            {
                let th = header.split(',');
                if (th.length < 4)
                {
                    th = ['Param', 'Value', 'New', 'Action'];
                }

                let html_str = `
                    <table>
                        <tr>
                            <th>${th[0].trim()}</th>
                            <th>${th[1].trim()}</th>
                        </tr>`;

                for (const n of names.split(','))
                {
                    const name = n.trim();

                    html_str += `<tr>
                                    <td>${name}</td>
                                    <td><input type="number" value="0"></td>
                                </tr>`;

                    this.values.push(0);
                }

                html_str += '</table>';

                this.innerHTML = html_str;

                this.tbody = this.querySelector('table tbody');

                this.add_event_listeners();
            }

            add_event_listeners()
            {
                for (let i=1; i<this.tbody.children.length; i++)
                {
                    const node = this.tbody.children[i].children[1].firstChild;
                    this.input_nodes.push(node)
                    node.addEventListener('keyup', (e) => {if (e.key == "Enter") this.change(i)});
                }
            }

            change(i)
            {
                console.log(`request ${i} = ${this.input_nodes[i-1].value}`);
                this.change_list.push([i-1, this.input_nodes[i-1].value]);
                this.input_nodes[i-1].blur();
                this.dispatchEvent(new CustomEvent('chgrequest'));
            }

            set changes(list)
            {
                this.change_list = list;
            }

            get changes()
            {
                const r = this.change_list;
                this.change_list = [];
                return r;
            }

            connectedCallback()
            {
                const names = this.attributes.names.value;
                const header = this.attributes.header.value;

                this.render(names, header);
            }

            update_values()
            {
                for (let i=1; i<this.tbody.children.length; i++)
                {
                    if (this.input_nodes[i-1] !== document.activeElement)
                    {
                        this.input_nodes[i-1].value = this._values[i-1];
                    }
                }
            }

            set values(v)
            {
                this._values = v;
                this.update_values();
            }

            get values()
            {
                return this._values;
            }
        }

        window.customElements.define('pwtk-paramlist', Paramlist);


    </script>
</head>
<html>
    <body>
        <h1>Web component testing ground</h1>
        <pwtk-paramlist id='pl-id' names='A, B, C, D' header='Name, Value, New, Action' ></pwtk-bitfield>

    </body>
    <script>
        let test_cnt = 0;
        const pl = document.getElementById("pl-id");
        function test()
        {
            pl.values = [test_cnt, test_cnt, test_cnt, test_cnt];
            test_cnt++;
        }

        setInterval(test, 1000);
    </script>
</html>