src/document.h

/*
 *  LDForge: LDraw parts authoring CAD
 *  Copyright (C) 2013 - 2020 Teemu Piippo
 *
 *  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/>.
 */

#pragma once
#include <memory>
#include <QWidget>
#include <QToolBar>
#include "model.h"
#include "vertexmap.h"
#include "gl/common.h"

enum EditingMode
{
	SelectMode,
	DrawMode
};

Q_DECLARE_METATYPE(EditingMode);

struct AppendToModel
{
	ModelElement newElement;
};

struct DeleteFromModel
{
	int position;
};

using ModelAction = std::variant<AppendToModel, DeleteFromModel>;

Q_DECLARE_METATYPE(ModelAction)

class EditTools final : public QObject, public RenderLayer
{
	Q_OBJECT
	std::vector<glm::vec3> polygon = {{0, 0, 0}};
	std::size_t numpoints = 1;
	EditingMode mode = SelectMode;
	glm::mat4 mvpMatrix;
	glm::mat4 gridMatrix{1};
	Plane gridPlane;
	opt<glm::vec3> worldPosition;
public:
	explicit EditTools(QObject *parent = nullptr);
	~EditTools() override;
	void applyToVertices(VertexMap::ApplyFunction fn) const;
	const QSet<ModelId> selectedObjects() const;
	EditingMode currentEditingMode() const;
	Q_SLOT void setEditMode(EditingMode mode);
	Q_SLOT void setGridMatrix(const glm::mat4& gridMatrix);
Q_SIGNALS:
	void newStatusText(const QString& newStatusText);
	void modelAction(const ModelAction& action);
	void select(const QSet<ModelId>& ids, bool retain);
protected:
	void mvpMatrixChanged(const glm::mat4& matrix) override;
	void mouseMoved(const QMouseEvent* event) override;
	void mouseClick(const QMouseEvent* event) override;
	void overpaint(QPainter* painter) override;
private:
	const std::vector<ModelAction> actions() const;
	void closeShape();
	void removeLastPoint();
	bool isCloseToExistingPoints() const;
};