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diff --git a/tkblt/generic/tkbltGrElemBar.h b/tkblt/generic/tkbltGrElemBar.h
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+++ b/tkblt/generic/tkbltGrElemBar.h
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+/*
+ * Smithsonian Astrophysical Observatory, Cambridge, MA, USA
+ * This code has been modified under the terms listed below and is made
+ * available under the same terms.
+ */
+
+/*
+ *	Copyright 1993-2004 George A Howlett.
+ *
+ *	Permission is hereby granted, free of charge, to any person obtaining
+ *	a copy of this software and associated documentation files (the
+ *	"Software"), to deal in the Software without restriction, including
+ *	without limitation the rights to use, copy, modify, merge, publish,
+ *	distribute, sublicense, and/or sell copies of the Software, and to
+ *	permit persons to whom the Software is furnished to do so, subject to
+ *	the following conditions:
+ *
+ *	The above copyright notice and this permission notice shall be
+ *	included in all copies or substantial portions of the Software.
+ *
+ *	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ *	EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ *	MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ *	NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ *	LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ *	OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ *	WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef __BltGrElemBar_h__
+#define __BltGrElemBar_h__
+
+#include <cmath>
+
+#include <tk.h>
+
+#include "tkbltGrElem.h"
+#include "tkbltGrPenBar.h"
+
+namespace Blt {
+
+  typedef struct {
+    float x1;
+    float y1;
+    float x2;
+    float y2;
+  } BarRegion;
+
+  typedef struct {
+    Weight weight;
+    BarPen* penPtr;
+    Rectangle* bars;
+    int nBars;
+    GraphSegments xeb;
+    GraphSegments yeb;
+    int symbolSize;
+    int errorBarCapWidth;
+  } BarStyle;
+
+  typedef struct {
+    Element* elemPtr;
+    const char *label;
+    char** tags;
+    Axis* xAxis;
+    Axis* yAxis;
+    ElemCoords coords;
+    ElemValues* w;
+    ElemValues* xError;
+    ElemValues* yError;
+    ElemValues* xHigh;
+    ElemValues* xLow;
+    ElemValues* yHigh;
+    ElemValues* yLow;
+    int hide;
+    int legendRelief;
+    Chain* stylePalette;
+    BarPen* builtinPenPtr;
+    BarPen* activePenPtr;
+    BarPen* normalPenPtr;
+    BarPenOptions builtinPen;
+
+    // derived
+    double barWidth;
+    const char *groupName;
+  } BarElementOptions;
+
+  class BarElement : public Element {
+  protected:
+    BarPen* builtinPenPtr;
+    int* barToData_;
+    Rectangle* bars_;
+    int* activeToData_;
+    Rectangle* activeRects_;
+    int nBars_;
+    int nActive_;
+    GraphSegments xeb_;
+    GraphSegments yeb_;
+
+  protected:
+    void ResetStylePalette(Chain*);
+    void checkStacks(Axis*, Axis*, double*, double*);
+    void mergePens(BarStyle**);
+    void mapActive();
+    void reset();
+    void mapErrorBars(BarStyle**);
+    void drawSegments(Drawable, BarPen*, Rectangle*, int);
+    void drawValues(Drawable, BarPen*, Rectangle*, int, int*);
+    void printSegments(PSOutput*, BarPen*, Rectangle*, int);
+    void printValues(PSOutput*, BarPen*, Rectangle*, int, int*);
+
+  public:
+    BarElement(Graph*, const char*, Tcl_HashEntry*);
+    virtual ~BarElement();
+
+    ClassId classId() {return CID_ELEM_BAR;}
+    const char* className() {return "BarElement";}
+    const char* typeName() {return "bar";}
+
+    int configure();
+    void map();
+    void extents(Region2d*);
+    void closest();
+    void draw(Drawable);
+    void drawActive(Drawable);
+    void drawSymbol(Drawable, int, int, int);
+    void print(PSOutput*);
+    void printActive(PSOutput*);
+    void printSymbol(PSOutput*, double, double, int);
+  };
+};
+
+#endif