148 lines
3.6 KiB
C++
148 lines
3.6 KiB
C++
//
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// Copyright (C) 2017 James Turner zakalawe@mac.com
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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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#ifndef FGCANVASELEMENT_H
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#define FGCANVASELEMENT_H
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#include <QObject>
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#include <QTransform>
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#include <QColor>
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#include <QVariant>
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#include <vector>
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class LocalProp;
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class FGCanvasPaintContext;
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class FGCanvasGroup;
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class CanvasItem;
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class QQuickItem;
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class CanvasConnection;
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/**
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* Coordinate reference frame (eg. "clip" property)
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*/
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enum class ReferenceFrame
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{
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GLOBAL, ///< Global coordinates
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PARENT, ///< Coordinates relative to parent coordinate frame
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LOCAL ///< Coordinates relative to local coordinates (parent
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/// coordinates with local transformations applied)
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};
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class FGCanvasElement : public QObject
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{
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Q_OBJECT
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public:
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explicit FGCanvasElement(FGCanvasGroup* pr, LocalProp* prop);
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void paint(FGCanvasPaintContext* context) const;
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QTransform combinedTransform() const;
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bool isVisible() const;
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int zIndex() const;
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const FGCanvasGroup* parentGroup() const;
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const FGCanvasGroup* rootGroup() const;
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CanvasConnection* connection() const;
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static bool isStyleProperty(QByteArray name);
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LocalProp* property() const;
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void setHighlighted(bool hilighted);
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bool isHighlighted() const;
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virtual CanvasItem* quickItem() const;
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virtual CanvasItem* createQuickItem(QQuickItem* parent);
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void requestPolish();
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void polish();
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virtual void dumpElement() = 0;
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protected:
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virtual void doPaint(FGCanvasPaintContext* context) const;
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virtual void doPolish();
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virtual bool onChildAdded(LocalProp* prop);
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virtual bool onChildRemoved(LocalProp* prop);
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virtual void doDestroy();
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const LocalProp* _propertyRoot;
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const FGCanvasGroup* _parent;
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QColor fillColor() const;
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QColor parseColorValue(QVariant value) const;
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virtual void markStyleDirty();
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QVariant getCascadedStyle(const char* name, QVariant defaultValue = QVariant()) const;
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private slots:
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void onPropDestroyed();
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private:
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void onCenterChanged(QVariant value);
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void markTransformsDirty();
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void markZIndexDirty(QVariant value);
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void onVisibleChanged(QVariant value);
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void markClipDirty();
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void markSVGIDDirty(QVariant value);
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private:
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friend class FGCanvasGroup;
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bool _polishRequired = false;
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bool _visible = true;
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bool _highlighted = false;
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mutable bool _transformsDirty = true;
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mutable bool _styleDirty = true;
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mutable QTransform _combinedTransform;
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QPointF _center;
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mutable QColor _fillColor;
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int _zIndex = 0;
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QByteArray _svgElementId;
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mutable bool _clipDirty = true;
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mutable bool _hasClip = false;
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mutable QRectF _clipRect;
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mutable ReferenceFrame _clipFrame = ReferenceFrame::GLOBAL;
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void parseCSSClip(QByteArray value);
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float parseCSSValue(QByteArray value) const;
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};
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using FGCanvasElementVec = std::vector<FGCanvasElement*>;
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#endif // FGCANVASELEMENT_H
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