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flightgear/utils/fgqcanvas/canvasdisplay.cpp

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//
// Copyright (C) 2017 James Turner zakalawe@mac.com
//
// 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 2 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, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#include "canvasdisplay.h"
#include <QDebug>
#include "canvasconnection.h"
#include "fgcanvasgroup.h"
#include "fgcanvaspaintcontext.h"
#include "canvasitem.h"
CanvasDisplay::CanvasDisplay(QQuickItem* parent) :
QQuickItem(parent)
{
setSize(QSizeF(400, 400));
qDebug() << "created a canvas display";
setFlag(ItemHasContents);
}
CanvasDisplay::~CanvasDisplay()
{
}
void CanvasDisplay::updatePolish()
{
m_rootElement->polish();
}
void CanvasDisplay::setCanvas(CanvasConnection *canvas)
{
if (m_connection == canvas)
return;
if (m_connection) {
disconnect(m_connection, nullptr, this, nullptr);
}
m_connection = canvas;
emit canvasChanged(m_connection);
// delete existing children
connect(m_connection, &CanvasConnection::statusChanged,
this, &CanvasDisplay::onConnectionStatusChanged);
connect(m_connection, &CanvasConnection::updated,
this, &CanvasDisplay::onConnectionUpdated);
}
void CanvasDisplay::onConnectionStatusChanged()
{
if (m_connection->status() == CanvasConnection::Connected) {
m_rootElement.reset(new FGCanvasGroup(nullptr, m_connection->propertyRoot()));
auto qq = m_rootElement->createQuickItem(this);
qq->setSize(QSizeF(400, 400));
}
}
void CanvasDisplay::onConnectionUpdated()
{
m_rootElement->polish();
update();
}