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utils/fgqcanvas/canvasdisplay.h

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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.
+
+#ifndef CANVASDISPLAY_H
+#define CANVASDISPLAY_H
+
+#include <memory>
+
+#include <QQuickItem>
+
+class CanvasConnection;
+class FGCanvasGroup;
+class QQuickItem;
+
+class CanvasDisplay : public QQuickItem
+{
+    Q_OBJECT
+
+    Q_PROPERTY(CanvasConnection* canvas READ canvas WRITE setCanvas NOTIFY canvasChanged)
+
+public:
+    CanvasDisplay(QQuickItem* parent = nullptr);
+    ~CanvasDisplay();
+
+    CanvasConnection* canvas() const
+    {
+        return m_connection;
+    }
+
+signals:
+
+    void canvasChanged(CanvasConnection* canvas);
+
+public slots:
+
+void setCanvas(CanvasConnection* canvas);
+
+protected:
+    void updatePolish() override;
+
+    void geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry) override;
+
+private slots:
+    void onConnectionStatusChanged();
+
+    void onConnectionUpdated();
+
+    void onCanvasSizeChanged();
+    void onConnectionDestroyed();
+
+private:
+    void recomputeScaling();
+
+    CanvasConnection* m_connection = nullptr;
+    std::unique_ptr<FGCanvasGroup> m_rootElement;
+    QQuickItem* m_rootItem = nullptr;
+    QSizeF m_sourceSize;
+};
+
+#endif // CANVASDISPLAY_H