New question system

UI/SaveButton.ts

@@ -0,0 +1,25 @@
+import {UIEventSource} from "./UIEventSource";
+import {UIElement} from "./UIElement";
+
+export class SaveButton extends UIElement {
+    private _value: UIEventSource<any>;
+
+    constructor(value: UIEventSource<any>) {
+        super(value);
+        if(value === undefined){
+            throw "No event source for savebutton, something is wrong"
+        }
+        this._value = value;
+    }
+
+    protected InnerRender(): string {
+        if (this._value.data === undefined ||
+            this._value.data === null
+            || this._value.data === ""
+        ) {
+            return "<span class='save-non-active'>Opslaan</span>"
+        }
+        return "<span class='save'>Opslaan</span>";
+    }
+
+}