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utils/fgqcanvas/fgcanvastext.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 FGCANVASTEXT_H
+#define FGCANVASTEXT_H
+
+#include <QFont>
+#include <QFontMetricsF>
+
+#include "fgcanvaselement.h"
+
+class TextCanvasItem;
+
+class FGCanvasText : public FGCanvasElement
+{
+public:
+    FGCanvasText(FGCanvasGroup* pr, LocalProp* prop);
+
+    CanvasItem* createQuickItem(QQuickItem *parent) override;
+    CanvasItem* quickItem() const override;
+
+    void dumpElement() override;
+protected:
+    virtual void doPaint(FGCanvasPaintContext* context) const override;
+    void doPolish() override;
+
+    virtual void markStyleDirty() override;
+
+    void doDestroy() override;
+
+private:
+    bool onChildAdded(LocalProp *prop) override;
+
+    void onTextChanged(QVariant var);
+
+    void setDrawMode(QVariant var);
+
+    void markFontDirty();
+
+    void onFontLoaded(QByteArray name);
+private:
+    void rebuildFont() const;
+    void rebuildAlignment(QVariant var) const;
+
+    QString _text;
+
+    mutable Qt::Alignment _alignment;
+    mutable bool _fontDirty = true;
+    mutable QFont _font;
+    mutable QFontMetricsF _metrics;
+
+    TextCanvasItem* _quickItem = nullptr;
+};
+
+
+#endif // FGCANVASTEXT_H