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142 lines
4.0 KiB
142 lines
4.0 KiB
//
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// Copyright (C) 2018 James Turner <james@flightgear.org>
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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 "canvaspainteddisplay.h"
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#include <QDebug>
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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 "localprop.h"
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CanvasPaintedDisplay::CanvasPaintedDisplay(QQuickItem* parent) :
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QQuickPaintedItem(parent)
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{
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setTransformOrigin(QQuickItem::TopLeft);
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setAntialiasing(true);
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}
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CanvasPaintedDisplay::~CanvasPaintedDisplay()
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{
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}
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void CanvasPaintedDisplay::paint(QPainter *painter)
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{
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if (!m_rootElement)
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return;
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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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const double f = std::min(xScaleFactor, yScaleFactor);
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painter->scale(f, f);
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FGCanvasPaintContext context(painter);
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m_rootElement->paint(&context);
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}
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void CanvasPaintedDisplay::geometryChanged(const QRectF &newGeometry, const QRectF &)
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{
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Q_UNUSED(newGeometry);
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update();
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}
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void CanvasPaintedDisplay::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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delete m_rootElement;
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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, &CanvasPaintedDisplay::onConnectionDestroyed);
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connect(m_connection, &CanvasConnection::statusChanged,
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this, &CanvasPaintedDisplay::onConnectionStatusChanged);
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connect(m_connection, &CanvasConnection::updated,
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this, &CanvasPaintedDisplay::onConnectionUpdated);
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onConnectionStatusChanged();
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}
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}
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void CanvasPaintedDisplay::onConnectionDestroyed()
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{
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qDebug() << Q_FUNC_INFO << "saw connection destroyed";
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m_connection = nullptr;
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delete m_rootElement;
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emit canvasChanged(m_connection);
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}
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void CanvasPaintedDisplay::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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buildElements();
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} else {
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if (m_rootElement) {
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qDebug() << Q_FUNC_INFO << "clearing root element";
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delete m_rootElement;
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m_rootElement.clear();
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}
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update();
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}
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}
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void CanvasPaintedDisplay::buildElements()
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{
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m_rootElement = 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.data(), &FGCanvasGroup::canvasSizeChanged,
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this, &CanvasPaintedDisplay::onCanvasSizeChanged);
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onCanvasSizeChanged();
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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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void CanvasPaintedDisplay::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 CanvasPaintedDisplay::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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update();
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}
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