src/editmodes/rectangleMode.cpp

/*
 *  LDForge: LDraw parts authoring CAD
 *  Copyright (C) 2013 - 2018 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/>.
 */

#include <QPainter>
#include <QMouseEvent>
#include "../canvas.h"
#include "rectangleMode.h"
#include "../linetypes/modelobject.h"
#include "../linetypes/quadrilateral.h"

RectangleMode::RectangleMode (Canvas* canvas) :
    Super (canvas),
	m_rectangleVerts (QVector<Vertex>(4)) {}

EditModeType RectangleMode::type() const
{
	return EditModeType::Rectangle;
}

void RectangleMode::render (QPainter& painter) const
{
	renderPolygon (painter, (countof(m_drawedVerts) > 0) ? m_rectangleVerts :
		QVector<Vertex> ({renderer()->position3D()}), true, false);
}

void RectangleMode::endDraw()
{
	if (countof(m_drawedVerts) == 2)
	{
		Model model {m_documents};
		LDQuadrilateral* quad = model.emplace<LDQuadrilateral>();
		updateRectVerts();

		for (int i = 0; i < quad->numVertices(); ++i)
			quad->setVertex(i, m_rectangleVerts[i]);

		finishDraw(model);
	}
}

//
// Update rect vertices when the mouse moves since the 3d position likely has changed
//
bool RectangleMode::mouseMoved (QMouseEvent*)
{
	updateRectVerts();
	return false;
}

void RectangleMode::updateRectVerts()
{
	if (m_drawedVerts.isEmpty())
	{
		for (int i = 0; i < 4; ++i)
			m_rectangleVerts[i] = renderer()->position3D();

		return;
	}

	Vertex v0 = m_drawedVerts[0],
		   v1 = (countof(m_drawedVerts) >= 2) ? m_drawedVerts[1] : renderer()->position3D();

	Axis localx, localy;
	renderer()->getRelativeAxes(localx, localy);
	m_rectangleVerts[0].setCoordinate(localx, v0[localx]);
	m_rectangleVerts[0].setCoordinate(localy, v0[localy]);
	m_rectangleVerts[1].setCoordinate(localx, v1[localx]);
	m_rectangleVerts[1].setCoordinate(localy, v0[localy]);
	m_rectangleVerts[2].setCoordinate(localx, v1[localx]);
	m_rectangleVerts[2].setCoordinate(localy, v1[localy]);
	m_rectangleVerts[3].setCoordinate(localx, v0[localx]);
	m_rectangleVerts[3].setCoordinate(localy, v1[localy]);

	// Compute local z from the draw plane
	for (int i = 0; i < 4; ++i)
		m_rectangleVerts[i] = projectToDrawPlane(m_rectangleVerts[i]);
}