140 lines
3.9 KiB
C++
140 lines
3.9 KiB
C++
//
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// Copyright (C) 2017 James Turner zakalawe@mac.com
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of the
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// License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful, but
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// WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#include "canvasdisplay.h"
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#include <QDebug>
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#include <QQuickItem>
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#include "canvasconnection.h"
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#include "fgcanvasgroup.h"
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#include "fgcanvaspaintcontext.h"
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#include "canvasitem.h"
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#include "localprop.h"
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CanvasDisplay::CanvasDisplay(QQuickItem* parent) :
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QQuickItem(parent)
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{
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setTransformOrigin(QQuickItem::TopLeft);
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setFlag(ItemHasContents);
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}
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CanvasDisplay::~CanvasDisplay()
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{
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delete m_rootItem;
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}
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void CanvasDisplay::updatePolish()
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{
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m_rootElement->polish();
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}
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void CanvasDisplay::geometryChanged(const QRectF &newGeometry, const QRectF &)
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{
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Q_UNUSED(newGeometry);
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recomputeScaling();
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}
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void CanvasDisplay::setCanvas(CanvasConnection *canvas)
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{
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if (m_connection == canvas)
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return;
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if (m_connection) {
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disconnect(m_connection, nullptr, this, nullptr);
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qDebug() << "deleting items";
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delete m_rootItem;
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qDebug() << "deleting elements";
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m_rootElement.reset();
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qDebug() << "done";
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}
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m_connection = canvas;
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emit canvasChanged(m_connection);
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if (m_connection) {
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connect(m_connection, &QObject::destroyed,
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this, &CanvasDisplay::onConnectionDestroyed);
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connect(m_connection, &CanvasConnection::statusChanged,
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this, &CanvasDisplay::onConnectionStatusChanged);
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connect(m_connection, &CanvasConnection::updated,
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this, &CanvasDisplay::onConnectionUpdated);
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onConnectionStatusChanged();
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}
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}
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void CanvasDisplay::onConnectionDestroyed()
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{
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m_connection = nullptr;
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emit canvasChanged(m_connection);
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m_rootElement.reset();
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}
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void CanvasDisplay::onConnectionStatusChanged()
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{
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if ((m_connection->status() == CanvasConnection::Connected) ||
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(m_connection->status() == CanvasConnection::Snapshot))
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{
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m_rootElement.reset(new FGCanvasGroup(nullptr, m_connection->propertyRoot()));
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// this is important to elements can discover their connection
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// by walking their parent chain
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m_rootElement->setParent(m_connection);
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connect(m_rootElement.get(), &FGCanvasGroup::canvasSizeChanged,
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this, &CanvasDisplay::onCanvasSizeChanged);
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m_rootItem = m_rootElement->createQuickItem(this);
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onCanvasSizeChanged();
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if (m_connection->status() == CanvasConnection::Snapshot) {
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m_connection->propertyRoot()->recursiveNotifyRestored();
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m_rootElement->polish();
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update();
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}
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}
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}
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void CanvasDisplay::onConnectionUpdated()
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{
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if (m_rootElement) {
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m_rootElement->polish();
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update();
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}
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}
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void CanvasDisplay::onCanvasSizeChanged()
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{
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m_sourceSize = QSizeF(m_connection->propertyRoot()->value("size", 256).toDouble(),
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m_connection->propertyRoot()->value("size[1]", 256).toDouble());
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setImplicitSize(m_sourceSize.width(), m_sourceSize.height());
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recomputeScaling();
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}
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void CanvasDisplay::recomputeScaling()
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{
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const double xScaleFactor = width() / m_sourceSize.width();
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const double yScaleFactor = height() / m_sourceSize.height();
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setScale(std::min(xScaleFactor, yScaleFactor));
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}
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