Citra-qt: Add multiplayer ui

src/citra_qt/multiplayer/direct_connect.h

@@ -0,0 +1,39 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+#include <memory>
+#include <QDialog>
+#include <QFutureWatcher>
+
+namespace Ui {
+class DirectConnect;
+}
+
+class DirectConnectWindow : public QDialog {
+    Q_OBJECT
+
+public:
+    explicit DirectConnectWindow(QWidget* parent = nullptr);
+
+signals:
+    /**
+     * Signalled by this widget when it is closing itself and destroying any state such as
+     * connections that it might have.
+     */
+    void Closed();
+
+private slots:
+    void OnConnection();
+
+private:
+    void Connect();
+    void ClearAllError();
+    void BeginConnecting();
+    void EndConnecting();
+
+    QFutureWatcher<void>* watcher;
+    Ui::DirectConnect* ui;
+};