/*
 * Olive Community Edition - Non-Linear Video Editor
 * Copyright (C) 2025 Olive CE Team
 *
 * 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 <http://www.gnu.org/licenses/>.
 */

#ifndef DRAGGABLEGIZMO_H
#define DRAGGABLEGIZMO_H

#include "gizmo.h"
#include "node/inputdragger.h"
#include "undo/undocommand.h"

namespace olive
{

class DraggableGizmo : public NodeGizmo {
	Q_OBJECT
public:
	/// Changes what the X/Y coordinates emitted from HandleMovement specify
	enum DragValueBehavior {
		/// X/Y will be the exact mouse coordinates (in sequence pixels)
		kAbsolute,

		/// X/Y will be the movement since the last time HandleMovement was called
		kDeltaFromPrevious,

		/// X/Y will be the movement from the start of the drag
		kDeltaFromStart
	};

	explicit DraggableGizmo(QObject *parent = nullptr);

	void DragStart(const NodeValueRow &row, double abs_x, double abs_y,
				   const olive::core::rational &time);

	void DragMove(double x, double y, const Qt::KeyboardModifiers &modifiers);

	void DragEnd(olive::MultiUndoCommand *command);

	void AddInput(const NodeKeyframeTrackReference &input)
	{
		inputs_.append(input);
		draggers_.append(NodeInputDragger());
	}

	QVector<NodeInputDragger> &GetDraggers()
	{
		return draggers_;
	}

	DragValueBehavior GetDragValueBehavior() const
	{
		return drag_value_behavior_;
	}
	void SetDragValueBehavior(DragValueBehavior d)
	{
		drag_value_behavior_ = d;
	}

signals:
	void HandleStart(const olive::NodeValueRow &row, double x, double y,
					 const olive::core::rational &time);

	void HandleMovement(double x, double y,
						const Qt::KeyboardModifiers &modifiers);

private:
	QVector<NodeKeyframeTrackReference> inputs_;

	QVector<NodeInputDragger> draggers_;

	DragValueBehavior drag_value_behavior_;
};

}

#endif // DRAGGABLEGIZMO_H