Refactoring: move all code files into a src directory

src/UI/Input/FileSelectorButton.ts

@@ -0,0 +1,91 @@
+import BaseUIElement from "../BaseUIElement"
+import { InputElement } from "./InputElement"
+import { UIEventSource } from "../../Logic/UIEventSource"
+
+/**
+ * @deprecated
+ */
+export default class FileSelectorButton extends InputElement<FileList> {
+    private static _nextid
+    private readonly _value = new UIEventSource<FileList>(undefined)
+    private readonly _label: BaseUIElement
+    private readonly _acceptType: string
+    private readonly allowMultiple: boolean
+    private readonly _labelClasses: string
+
+    constructor(
+        label: BaseUIElement,
+        options?: {
+            acceptType: "image/*" | string
+            allowMultiple: true | boolean
+            labelClasses?: string
+        }
+    ) {
+        super()
+        this._label = label
+        this._acceptType = options?.acceptType ?? "image/*"
+        this._labelClasses = options?.labelClasses ?? ""
+        this.SetClass("block cursor-pointer")
+        label.SetClass("cursor-pointer")
+        this.allowMultiple = options?.allowMultiple ?? true
+    }
+
+    GetValue(): UIEventSource<FileList> {
+        return this._value
+    }
+
+    IsValid(t: FileList): boolean {
+        return true
+    }
+
+    protected InnerConstructElement(): HTMLElement {
+        const self = this
+        const el = document.createElement("form")
+        const label = document.createElement("label")
+        label.appendChild(this._label.ConstructElement())
+        label.classList.add(...this._labelClasses.split(" ").filter((t) => t !== ""))
+        el.appendChild(label)
+
+        const actualInputElement = document.createElement("input")
+        actualInputElement.style.cssText = "display:none"
+        actualInputElement.type = "file"
+        actualInputElement.accept = this._acceptType
+        actualInputElement.name = "picField"
+        actualInputElement.multiple = this.allowMultiple
+        actualInputElement.id = "fileselector" + FileSelectorButton._nextid
+        FileSelectorButton._nextid++
+
+        label.htmlFor = actualInputElement.id
+
+        actualInputElement.onchange = () => {
+            if (actualInputElement.files !== null) {
+                self._value.setData(actualInputElement.files)
+            }
+        }
+
+        el.addEventListener("submit", (e) => {
+            if (actualInputElement.files !== null) {
+                self._value.setData(actualInputElement.files)
+            }
+            e.preventDefault()
+        })
+
+        el.appendChild(actualInputElement)
+
+        el.addEventListener("dragover", (event) => {
+            event.stopPropagation()
+            event.preventDefault()
+            // Style the drag-and-drop as a "copy file" operation.
+            event.dataTransfer.dropEffect = "copy"
+        })
+
+        el.addEventListener("drop", (event) => {
+            event.stopPropagation()
+            event.preventDefault()
+            const fileList = event.dataTransfer.files
+            this._value.setData(fileList)
+        })
+
+        return el
+    }
+}