1 files changed, 126 insertions, 0 deletions
diff --git a/meshmc/launcher/ui/instanceview/VisualGroup.h b/meshmc/launcher/ui/instanceview/VisualGroup.h
new file mode 100644
index 0000000000..9ef7771d03
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+++ b/meshmc/launcher/ui/instanceview/VisualGroup.h
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+/* SPDX-FileCopyrightText: 2026 Project Tick
+ * SPDX-FileContributor: Project Tick
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   MeshMC - A Custom Launcher for Minecraft
+ *   Copyright (C) 2026 Project Tick
+ *
+ *   This program is free software: you can redistribute it and/or modify
+ *   it under the terms of the GNU General Public License as published by
+ *   the Free Software Foundation, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This program is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *   GNU General Public License for more details.
+ *
+ *   You should have received a copy of the GNU General Public License
+ *   along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ *
+ * Copyright 2013-2021 MultiMC Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <QString>
+#include <QRect>
+#include <QVector>
+#include <QStyleOption>
+
+class InstanceView;
+class QPainter;
+class QModelIndex;
+
+struct VisualRow {
+	QList<QModelIndex> items;
+	int height = 0;
+	int top = 0;
+	inline int size() const
+	{
+		return items.size();
+	}
+	inline QModelIndex& operator[](int i)
+	{
+		return items[i];
+	}
+};
+
+struct VisualGroup {
+	/* constructors */
+	VisualGroup(const QString& text, InstanceView* view);
+	VisualGroup(const VisualGroup* other);
+
+	/* data */
+	InstanceView* view = nullptr;
+	QString text;
+	bool collapsed = false;
+	QVector<VisualRow> rows;
+	int firstItemIndex = 0;
+	int m_verticalPosition = 0;
+
+	/* logic */
+	/// update the internal list of items and flow them into the rows.
+	void update();
+
+	/// draw the header at y-position.
+	void drawHeader(QPainter* painter, const QStyleOptionViewItem& option);
+
+	/// height of the group, in total. includes a small bit of padding.
+	int totalHeight() const;
+
+	/// height of the group header, in pixels
+	int headerHeight() const;
+
+	/// height of the group content, in pixels
+	int contentHeight() const;
+
+	/// the number of visual rows this group has
+	int numRows() const;
+
+	/// actually calculate the above value
+	int calculateNumRows() const;
+
+	/// the height at which this group starts, in pixels
+	int verticalPosition() const;
+
+	/// relative geometry - top of the row of the given item
+	int rowTopOf(const QModelIndex& index) const;
+
+	/// height of the row of the given item
+	int rowHeightOf(const QModelIndex& index) const;
+
+	/// x/y position of the given item inside the group (in items!)
+	QPair<int, int> positionOf(const QModelIndex& index) const;
+
+	enum HitResult {
+		NoHit = 0x0,
+		TextHit = 0x1,
+		CheckboxHit = 0x2,
+		HeaderHit = 0x4,
+		BodyHit = 0x8
+	};
+	Q_DECLARE_FLAGS(HitResults, HitResult)
+
+	/// shoot! BANG! what did we hit?
+	HitResults hitScan(const QPoint& pos) const;
+
+	QList<QModelIndex> items() const;
+};
+
+Q_DECLARE_OPERATORS_FOR_FLAGS(VisualGroup::HitResults)