/***

  Olive - Non-Linear Video Editor
  Copyright (C) 2022 Olive Team
  Modifications Copyright (C) 2025 mikesolar

  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 OAK_DRAGGABLEGIZMO_H
#define OAK_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)
		k_absolute,

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

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

	explicit DraggableGizmo(QObject *parent = nullptr);

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

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

	void drag_end(olive::MultiUndoCommand *command);

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

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

	DragValueBehavior get_drag_value_behavior() const
	{
		return drag_value_behavior_;
	}
	void set_drag_value_behavior(DragValueBehavior d)
	{
		drag_value_behavior_ = d;
	}

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

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

private:
	QVector<NodeKeyframeTrackReference> inputs_;

	QVector<NodeInputDragger> draggers_;

	DragValueBehavior drag_value_behavior_;
};

}

#endif // OAK_DRAGGABLEGIZMO_H