Everywhere: Move the Ladybird folder to UI

Author: https://github.com/trflynn89
Commit: db47cc41f8
Pull-request: https://github.com/LadybirdBrowser/ladybird/pull/2256
Reviewed-by: https://github.com/sideshowbarker

UI/Qt/TabBar.h

@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2024, Tim Flynn <trflynn89@serenityos.org>
+ * Copyright (c) 2024, Jamie Mansfield <jmansfield@cadixdev.org>
+ * Copyright (c) 2024, Sam Atkins <sam@ladybird.org>
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
+ */
+
+#pragma once
+
+#include <QProxyStyle>
+#include <QPushButton>
+#include <QTabBar>
+#include <QTabWidget>
+
+class QContextMenuEvent;
+class QEvent;
+class QIcon;
+class QWidget;
+
+namespace Ladybird {
+
+class TabBar : public QTabBar {
+    Q_OBJECT
+
+public:
+    explicit TabBar(QWidget* parent = nullptr);
+
+    virtual QSize tabSizeHint(int index) const override;
+    virtual void contextMenuEvent(QContextMenuEvent* event) override;
+
+private:
+    void mousePressEvent(QMouseEvent*) override;
+    void mouseMoveEvent(QMouseEvent*) override;
+
+    int m_x_position_in_selected_tab_while_dragging;
+};
+
+class TabWidget : public QTabWidget {
+    Q_OBJECT
+
+public:
+    explicit TabWidget(QWidget* parent = nullptr);
+
+    virtual void paintEvent(QPaintEvent*) override;
+};
+
+class TabBarButton : public QPushButton {
+    Q_OBJECT
+
+public:
+    explicit TabBarButton(QIcon const& icon, QWidget* parent = nullptr);
+
+protected:
+    virtual bool event(QEvent* event) override;
+};
+
+class TabStyle : public QProxyStyle {
+    Q_OBJECT
+
+public:
+    explicit TabStyle(QObject* parent = nullptr);
+
+    virtual QRect subElementRect(QStyle::SubElement, QStyleOption const*, QWidget const*) const override;
+};
+
+}