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67 lines
1.6 KiB
C++
67 lines
1.6 KiB
C++
// -*- C++ -*-
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/**
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* \file RenderBase.h
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* This file is part of LyX, the document processor.
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* Licence details can be found in the file COPYING.
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*
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* \author Angus Leeming
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*
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* Full author contact details are available in file CREDITS.
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*/
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#ifndef RENDERBASE_H
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#define RENDERBASE_H
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#include "Dimension.h"
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namespace lyx {
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class Inset;
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class MetricsInfo;
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class PainterInfo;
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class RenderButton;
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class RenderGraphic;
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class RenderPreview;
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class RenderMonitoredPreview;
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class RenderBase {
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public:
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virtual ~RenderBase() {}
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virtual RenderBase * clone(Inset const *) const = 0;
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/// compute the size of the object returned in dim.
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/// \retval true if the metrics has changed.
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virtual void metrics(MetricsInfo & mi, Dimension & dim) const = 0;
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/// draw inset and update (xo, yo)-cache
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virtual void draw(PainterInfo & pi, int x, int y) const = 0;
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/// render state, exact meaning of state is render-specific
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void setRenderState(bool state) { state_ = state; }
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/// get render state
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bool renderState() const { return state_; }
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/// equivalent to dynamic_cast
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virtual RenderButton * asButton() { return 0; }
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virtual RenderGraphic * asGraphic() { return 0; }
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virtual RenderPreview * asPreview() { return 0; }
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virtual RenderMonitoredPreview * asMonitoredPreview() { return 0; }
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protected:
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RenderBase() : state_(false) {}
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RenderBase(RenderBase const & x) : state_(x.state_) {}
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RenderBase & operator=(RenderBase const &) { return *this; }
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/// render state. currently, render_button uses this to store mouse_hover_
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bool state_;
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/// Cached
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mutable Dimension dim_;
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};
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} // namespace lyx
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#endif // NOT RENDERBASE_H
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