first commit

2022-10-20 20:29:11 +08:00
commit 4d531f8044
3238 changed files with 1387862 additions and 0 deletions
--- a/utils/fgqcanvas/canvasdisplay.cpp
+++ b/utils/fgqcanvas/canvasdisplay.cpp
@@ -0,0 +1,139 @@
+//
+// 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 <QQuickItem>
+
+#include "canvasconnection.h"
+#include "fgcanvasgroup.h"
+#include "fgcanvaspaintcontext.h"
+#include "canvasitem.h"
+#include "localprop.h"
+
+CanvasDisplay::CanvasDisplay(QQuickItem* parent) :
+    QQuickItem(parent)
+{
+    setTransformOrigin(QQuickItem::TopLeft);
+    setFlag(ItemHasContents);
+}
+
+CanvasDisplay::~CanvasDisplay()
+{
+    delete m_rootItem;
+}
+
+void CanvasDisplay::updatePolish()
+{
+    m_rootElement->polish();
+}
+
+void CanvasDisplay::geometryChanged(const QRectF &newGeometry, const QRectF &)
+{
+    Q_UNUSED(newGeometry);
+    recomputeScaling();
+}
+
+void CanvasDisplay::setCanvas(CanvasConnection *canvas)
+{
+    if (m_connection == canvas)
+        return;
+
+    if (m_connection) {
+        disconnect(m_connection, nullptr, this, nullptr);
+
+
+        qDebug() << "deleting items";
+        delete m_rootItem;
+
+        qDebug() << "deleting elements";
+        m_rootElement.reset();
+
+        qDebug() << "done";
+    }
+
+    m_connection = canvas;
+    emit canvasChanged(m_connection);
+
+    if (m_connection) {
+        connect(m_connection, &QObject::destroyed,
+                this, &CanvasDisplay::onConnectionDestroyed);
+        connect(m_connection, &CanvasConnection::statusChanged,
+                this, &CanvasDisplay::onConnectionStatusChanged);
+        connect(m_connection, &CanvasConnection::updated,
+                this, &CanvasDisplay::onConnectionUpdated);
+
+        onConnectionStatusChanged();
+    }
+
+}
+
+void CanvasDisplay::onConnectionDestroyed()
+{
+    m_connection = nullptr;
+    emit canvasChanged(m_connection);
+
+    m_rootElement.reset();
+}
+
+void CanvasDisplay::onConnectionStatusChanged()
+{
+    if ((m_connection->status() == CanvasConnection::Connected) ||
+            (m_connection->status() == CanvasConnection::Snapshot))
+    {
+        m_rootElement.reset(new FGCanvasGroup(nullptr, m_connection->propertyRoot()));
+        // this is important to elements can discover their connection
+        // by walking their parent chain
+        m_rootElement->setParent(m_connection);
+
+        connect(m_rootElement.get(), &FGCanvasGroup::canvasSizeChanged,
+                this, &CanvasDisplay::onCanvasSizeChanged);
+
+        m_rootItem = m_rootElement->createQuickItem(this);
+        onCanvasSizeChanged();
+
+        if (m_connection->status() == CanvasConnection::Snapshot) {
+            m_connection->propertyRoot()->recursiveNotifyRestored();
+            m_rootElement->polish();
+            update();
+        }
+    }
+}
+
+void CanvasDisplay::onConnectionUpdated()
+{
+    if (m_rootElement) {
+        m_rootElement->polish();
+        update();
+    }
+}
+
+void CanvasDisplay::onCanvasSizeChanged()
+{
+    m_sourceSize = QSizeF(m_connection->propertyRoot()->value("size", 256).toDouble(),
+                          m_connection->propertyRoot()->value("size[1]", 256).toDouble());
+    setImplicitSize(m_sourceSize.width(), m_sourceSize.height());
+    recomputeScaling();
+}
+
+void CanvasDisplay::recomputeScaling()
+{
+    const double xScaleFactor = width() / m_sourceSize.width();
+    const double yScaleFactor =  height() / m_sourceSize.height();
+    setScale(std::min(xScaleFactor, yScaleFactor));
+}