X-Git-Url: https://git.lyx.org/gitweb/?a=blobdiff_plain;f=src%2Finsets%2Frender_base.h;h=4aea45469824baed9111d9234950b178da082edf;hb=e28331ed63062dea10d0a21b9ec12034b4b17b9a;hp=23a5e9af4394dff47cf791e4bc51cbd6ce1ec43d;hpb=fff7d8407c7f6b9ed10cd04f9356c3d56d89bf05;p=lyx.git

diff --git a/src/insets/render_base.h b/src/insets/render_base.h
index 23a5e9af43..4aea454698 100644
--- a/src/insets/render_base.h
+++ b/src/insets/render_base.h
@@ -16,6 +16,9 @@
 
 #include <memory>
 
+
+namespace lyx {
+
 class InsetBase;
 class MetricsInfo;
 class PainterInfo;
@@ -31,10 +34,15 @@ public:
 
 	virtual std::auto_ptr<RenderBase> clone(InsetBase const *) const = 0;
 
-	/// compute the size of the object returned in dim
-	virtual void metrics(MetricsInfo & mi, Dimension & dim) const = 0;
+	/// compute the size of the object returned in dim.
+	/// \retval true if the metrics has changed.
+	virtual bool metrics(MetricsInfo & mi, Dimension & dim) const = 0;
 	/// draw inset and update (xo, yo)-cache
 	virtual void draw(PainterInfo & pi, int x, int y) const = 0;
+	/// render state, exact meaning of state is render-specific
+	void setRenderState(int state) { state_ = state; }
+	/// get render state
+	int renderState() const { return state_; } 
 
 	/// equivalent to dynamic_cast
 	virtual RenderButton * asButton() { return 0; }
@@ -45,10 +53,15 @@ public:
 protected:
 	RenderBase() {}
 	RenderBase(RenderBase const &) {}
-	void operator=(RenderBase const &) {}
+	RenderBase & operator=(RenderBase const &) { return *this; }
 
+	/// render state. currently, render_button uses this to store mouse_hover_
+	int state_;
 	/// Cached
 	mutable Dimension dim_;
 };
 
+
+} // namespace lyx
+
 #endif // NOT RENDER_BASE_H