Add multi-checkbox component

UI/Input/Checkboxes.ts

@@ -0,0 +1,113 @@
+import {InputElement} from "./InputElement";
+import {UIEventSource} from "../../Logic/UIEventSource";
+import {Utils} from "../../Utils";
+
+/**
+ * Supports multi-input
+ */
+export class CheckBoxes<T> extends InputElement<T[]> {
+    IsSelected: UIEventSource<boolean> = new UIEventSource<boolean>(false);
+
+    private readonly _selectedElementIndex: UIEventSource<number>
+        = new UIEventSource<number>(null);
+
+    private readonly value: UIEventSource<T[]>;
+    private readonly _elements: InputElement<T>[]
+    private readonly _selectFirstAsDefault: boolean;
+
+
+    constructor(elements: InputElement<T>[],
+                selectFirstAsDefault = true) {
+        super(undefined);
+        this._elements = Utils.NoNull(elements);
+        this._selectFirstAsDefault = selectFirstAsDefault;
+
+        this.value = new UIEventSource<T[]>([])
+        this.ListenTo(this.value);
+
+    }
+
+    IsValid(ts: T[]): boolean {
+        if (ts === undefined) {
+            return false;
+        }
+        for (const t of ts) {
+            let matchFound = false;
+            for (const element of this._elements) {
+                if (element.IsValid(t)) {
+                    matchFound = true;
+                    break
+                }
+            }
+            if (!matchFound) {
+                return false;
+            }
+        }
+        return true;
+    }
+
+    GetValue(): UIEventSource<T[]> {
+        return this.value;
+    }
+
+
+    private IdFor(i) {
+        return 'checkmark-' + this.id + '-' + i;
+    }
+
+    InnerRender(): string {
+
+        let body = "";
+        for (let i = 0; i < this._elements.length; i++) {
+            let el = this._elements[i];
+            const htmlElement =
+                `<input type="checkbox" id="${this.IdFor(i)}"><label for="${this.IdFor(i)}">${el.Render()}</label><br/>`;
+            body += htmlElement;
+
+        }
+
+        return `<form id='${this.id}-form'>${body}</form>`;
+    }
+
+    protected InnerUpdate(htmlElement: HTMLElement) {
+        super.InnerUpdate(htmlElement);
+        const self = this;
+
+        for (let i = 0; i < this._elements.length; i++) {
+            const el = document.getElementById(this.IdFor(i));
+            const inputEl = this._elements[i];
+            {
+
+                const v = inputEl.GetValue().data;
+                const index = self.value.data.indexOf(v);
+                if(index >= 0){
+                    // @ts-ignore
+                    el.checked = true;
+                }
+            }
+
+
+            el.onchange = e => {
+                const v = inputEl.GetValue().data;
+                const index = self.value.data.indexOf(v);
+                // @ts-ignore
+                if (el.checked) {
+                    if (index < 0) {
+                        self.value.data.push(v);
+                        self.value.ping();
+                    }
+                } else {
+                    if (index >= 0) {
+                        self.value.data.splice(index, 1);
+                        self.value.ping();
+                    }
+                }
+            }
+
+        }
+
+
+    }
+
+
+}