Prepare for independent decoration drawing.

* InsetBase::drawDecoration(): new method.

* all other files: implement drawDecoration().


git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@16772 a592a061-630c-0410-9148-cb99ea01b6c8

src/insets/insetbase.h

@@ -114,6 +114,10 @@ public:
 	virtual bool editing(BufferView * bv) const;
 	///
 	virtual bool showInsetDialog(BufferView *) const { return false; }
+
+	/// draw inset decoration if necessary.
+	/// This can use \c drawMarkers() for example.
+	virtual void drawDecoration(PainterInfo &, int, int) const {}
 	/// draw four angular markers
 	void drawMarkers(PainterInfo & pi, int x, int y) const;
 	/// draw two angular markers

src/mathed/InsetMathBinom.h

@@ -31,6 +31,9 @@ public:
 	bool metrics(MetricsInfo & mi, Dimension & dim) const;
 	///
 	void draw(PainterInfo &, int x, int y) const;
+	/// draw decorations.
+	void drawDecoration(PainterInfo & pi, int x, int y) const
+	{ drawMarkers2(pi, x, y); }
 	///
 	bool extraBraces() const;
 private:

src/mathed/InsetMathGrid.h

@@ -103,6 +103,9 @@ public:
 	///
 	void drawWithMargin(PainterInfo & pi, int x, int y,
 		int lmargin = 0, int rmargin = 0) const;
+	/// draw decorations.
+	void drawDecoration(PainterInfo & pi, int x, int y) const
+	{ drawMarkers2(pi, x, y); }
 	///
 	void metricsT(TextMetricsInfo const & mi, Dimension & dim) const;
 	///

src/mathed/InsetMathMacro.h

@@ -33,6 +33,9 @@ public:
 	void drawExpanded(PainterInfo & pi, int x, int y) const;
 	/// draw selection background
 	void drawSelection(PainterInfo & pi, int x, int y) const;
+	/// draw decorations.
+	void drawDecoration(PainterInfo & pi, int x, int y) const
+	{ drawMarkers2(pi, x, y); }
 	///
 	bool metrics(MetricsInfo & mi, Dimension & dim) const;
 	/// get cursor position

src/mathed/InsetMathNest.h

@@ -35,6 +35,9 @@ public:
 	void draw(PainterInfo & pi, int x, int y) const;
 	/// draw selection background
 	void drawSelection(PainterInfo & pi, int x, int y) const;
+	/// draw decorations.
+	void drawDecoration(PainterInfo & pi, int x, int y) const
+	{ drawMarkers(pi, x, y); }
 	/// identifies NestInsets
 	InsetMathNest * asNestInset() { return this; }
 	/// identifies NestInsets