Graphs now have a legend.

.gitignore

@@ -1,2 +1,3 @@
 *~
 build/
+core

0BUILD

@@ -150,10 +150,16 @@
     <define name="OS_TYPE"                value="$(GWBUILD_SYSTEM)"             quoted="TRUE" />
     <define name="OS_SHORTNAME"           value="$(GWBUILD_SYSTEM)"             quoted="TRUE" />
 
+    <data dist="TRUE" install="$(libdir)/pkgconfig" generated="true">
+      aqdiagram.pc
+    </data>
+
     <subdirs>
       src
     </subdirs>
 
+    <writeFile name="aqdiagram.pc" />
+
 
     <!-- Build with "gwbuild -B gettext-src" -->
     <ifVarMatches name="xgettext_EXISTS" value="TRUE" >

aqdiagram.pc.in

@@ -0,0 +1,14 @@
+prefix=@prefix@
+
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+
+Name: aqdiagram
+Description: AqDiagram is a library for creating simple diagrams.
+Version: @VERSION@
+Libs: -L${libdir} -laqdiagram
+Cflags: -I${includedir}/aqdiagram
+
+aqdatabase_typemakerdir=${prefix}/share/aqdiagram/typemaker2
+

src/lib/aqdiagram/draw/0BUILD

@@ -59,7 +59,7 @@
     </setVar>
 
 
-    <headers dist="false" install="$(pkgincludedir)">
+    <headers dist="false" install="$(pkgincludedir)/draw">
       $(local/built_headers_pub)
     </headers>
 
@@ -68,7 +68,7 @@
     </headers>
 
 
-    <headers dist="true" install="$(pkgincludedir)">
+    <headers dist="true" install="$(pkgincludedir)/draw">
       context_cairo.h
       w_drawable.h
     </headers>

src/lib/aqdiagram/graph/0BUILD

@@ -67,7 +67,7 @@
   
 
   
-    <headers dist="false" install="$(pkgincludedir)">
+    <headers dist="false" install="$(pkgincludedir)/graph">
       $(local/built_headers_pub)
     </headers>
 
@@ -76,7 +76,7 @@
     </headers>
 
 
-    <headers dist="true" install="$(pkgincludedir)">
+    <headers dist="true" install="$(pkgincludedir)/graph">
       graph.h
       timegraph.h
       w_graph.h
@@ -84,6 +84,7 @@
       w_xaxis.h
       w_yaxis.h
       w_viewport.h
+      w_legend.h
     </headers>
 
 
@@ -92,6 +93,7 @@
       w_graph_p.h
       w_axis_p.h
       w_viewport_p.h
+      w_legend_p.h
     </headers>
   
   
@@ -104,6 +106,7 @@
       w_xaxis.c
       w_yaxis.c
       w_viewport.c
+      w_legend.c
     </sources>
 
 

src/lib/aqdiagram/graph/timegraph.c

@@ -0,0 +1,156 @@
+/****************************************************************************
+ * This file is part of the project AqDiagram.
+ * AqDiagram (c) by 2025 Martin Preuss, all rights reserved.
+ *
+ * The license for this file can be found in the file COPYING which you
+ * should have received along with this file.
+ ****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "./timegraph.h"
+
+#include <gwenhywfar/debug.h>
+
+
+
+/* ------------------------------------------------------------------------------------------------
+ * forward declarations
+ * ------------------------------------------------------------------------------------------------
+ */
+
+static void _setupTicksForTimeAxis(AQDG_GRAPH_AXIS *axis);
+static void _setupTicksForDataAxis(AQDG_GRAPH_AXIS *axis);
+
+
+
+/* ------------------------------------------------------------------------------------------------
+ * code
+ * ------------------------------------------------------------------------------------------------
+ */
+
+
+
+AQDG_GRAPH *AQDG_TimeGraph_new(const char *sTitle,
+                               const char *sSubTitle,
+                               const char *sYLabel,
+                               const char *sYUnits,
+                               int yPrecision)
+{
+  AQDG_GRAPH *g;
+  AQDG_GRAPH_AXIS *xAxis;
+  AQDG_GRAPH_AXIS *yAxis;
+  AQDG_GRAPH_SUBGRAPH *subGraph;
+
+  g=AQDG_Graph_new();
+  AQDG_Graph_SetTitle(g, sTitle);
+  AQDG_Graph_SetSubTitle(g, sSubTitle);
+
+  xAxis=AQDG_Graph_Axis_new();
+  AQDG_Graph_Axis_SetLabel(xAxis, "Time");
+  AQDG_Graph_Axis_SetPrecision(xAxis, 0);
+  AQDG_Graph_SetAxis(g, AQDG_GRAPH_AXISPOS_BOTTOM, xAxis);
+
+  yAxis=AQDG_Graph_Axis_new();
+  AQDG_Graph_Axis_SetLabel(yAxis, sYLabel);
+  AQDG_Graph_Axis_SetPrecision(yAxis, yPrecision);
+  AQDG_Graph_Axis_SetUnits(yAxis, sYUnits);
+  AQDG_Graph_SetAxis(g, AQDG_GRAPH_AXISPOS_LEFT, yAxis);
+
+  subGraph=AQDG_Graph_SubGraph_new();
+  AQDG_Graph_SubGraph_SetIndexAxisX(subGraph, AQDG_GRAPH_AXISPOS_BOTTOM);
+  AQDG_Graph_SubGraph_SetIndexAxisY(subGraph, AQDG_GRAPH_AXISPOS_LEFT);
+  AQDG_Graph_AddSubGraph(g, subGraph);
+
+  return g;
+}
+
+
+
+void AQDG_TimeGraph_AddCurve(AQDG_GRAPH *g, const char *sLabel, int graphType, AQDG_GRAPH_DATAPAIR_LIST *dpList)
+{
+  AQDG_GRAPH_SUBGRAPH *subGraph;
+
+  subGraph=AQDG_Graph_GetFirstSubGraph(g);
+  if (subGraph) {
+    AQDG_GRAPH_CURVE *curve;
+
+    curve=AQDG_Graph_Curve_new();
+    AQDG_Graph_Curve_SetLabel(curve, sLabel);
+    AQDG_Graph_Curve_SetGraphType(curve, graphType);
+    AQDG_Graph_Curve_SetDataPairs(curve, dpList);
+    AQDG_Graph_SubGraph_AddCurve(subGraph, curve);
+  }
+}
+
+
+
+void AQDG_TimeGraph_SetupTicks(AQDG_GRAPH *g)
+{
+  AQDG_GRAPH_AXIS *axis;
+
+  AQDG_Graph_CalcMinMaxValues(g);
+
+  /* create ticks for X axis */
+  axis=AQDG_Graph_GetAxisByIndex(g, AQDG_GRAPH_AXISPOS_BOTTOM);
+  if (axis) {
+    _setupTicksForTimeAxis(axis);
+  }
+
+  /* create ticks for Y axis */
+  axis=AQDG_Graph_GetAxisByIndex(g, AQDG_GRAPH_AXISPOS_LEFT);
+  if (axis) {
+    _setupTicksForDataAxis(axis);
+  }
+}
+
+
+
+void _setupTicksForTimeAxis(AQDG_GRAPH_AXIS *axis)
+{
+  double minValue;
+  double maxValue;
+  double diffInDays;
+
+  minValue=AQDG_Graph_Axis_GetMinValue(axis);
+  maxValue=AQDG_Graph_Axis_GetMaxValue(axis);
+  diffInDays=(maxValue-minValue)/(24*60*60);
+  DBG_ERROR(NULL, "Difference in days: %f.0", diffInDays);
+  if (diffInDays<3) {
+    DBG_ERROR(NULL, "Gen hour ticks");
+    AQDG_Graph_Axis_GenHourTicks(axis, 0);
+  }
+  else if (diffInDays<32) {
+    DBG_ERROR(NULL, "Gen day ticks");
+    AQDG_Graph_Axis_GenDayTicks(axis, 0);
+  }
+  else if (diffInDays<90) {
+    DBG_ERROR(NULL, "Gen week and day ticks");
+    AQDG_Graph_Axis_GenWeekTicks(axis, 0);
+    AQDG_Graph_Axis_GenDayTicks(axis, 1);
+  }
+  else {
+    DBG_ERROR(NULL, "Gen month ticks");
+    AQDG_Graph_Axis_GenMonthTicks(axis, 0);
+    if (diffInDays<100)
+      AQDG_Graph_Axis_GenDayTicks(axis, 1);
+    else if (diffInDays<400)
+      AQDG_Graph_Axis_GenWeekTicks(axis, 1);
+  }
+}
+
+
+
+void _setupTicksForDataAxis(AQDG_GRAPH_AXIS *axis)
+{
+  AQDG_Graph_Axis_GenLog10Ticks(axis);
+}
+
+
+
+
+
+
+

src/lib/aqdiagram/graph/timegraph.h

@@ -0,0 +1,29 @@
+/****************************************************************************
+ * This file is part of the project AqDiagram.
+ * AqDiagram (c) by 2025 Martin Preuss, all rights reserved.
+ *
+ * The license for this file can be found in the file COPYING which you
+ * should have received along with this file.
+ ****************************************************************************/
+
+#ifndef AQDG_GRAPH_TIMEGRAPH_H
+#define AQDG_GRAPH_TIMEGRAPH_H
+
+#include <aqdiagram/placement/object.h>
+#include <aqdiagram/graph/graph.h>
+
+
+AQDG_API AQDG_GRAPH *AQDG_TimeGraph_new(const char *sTitle,
+                                        const char *sSubTitle,
+                                        const char *sYLabel,
+                                        const char *sYUnits,
+                                        int yPrecision);
+
+AQDG_API void AQDG_TimeGraph_AddCurve(AQDG_GRAPH *g, const char *sLabel, int graphType, AQDG_GRAPH_DATAPAIR_LIST *dpList);
+AQDG_API void AQDG_TimeGraph_SetupTicks(AQDG_GRAPH *g);
+
+
+
+
+#endif
+

src/lib/aqdiagram/graph/w_graph.c

@@ -15,6 +15,7 @@
 #include "aqdiagram/graph/w_xaxis.h"
 #include "aqdiagram/graph/w_yaxis.h"
 #include "aqdiagram/graph/w_viewport.h"
+#include "aqdiagram/graph/w_legend.h"
 #include "aqdiagram/draw/w_vlayout.h"
 #include "aqdiagram/draw/w_mlayout.h"
 #include "aqdiagram/draw/w_label.h"
@@ -113,6 +114,9 @@ void _setupObjectTree(AQDG_OBJECT *o)
   const char *s;
 
   xo=GWEN_INHERIT_GETDATA(AQDG_OBJECT, AQDG_WIDGET_GRAPH, o);
+  AQDG_DrawableWidget_SetForegroundPenId(o, xo->penArray[AQDG_GRAPHWIDGET_PEN_IDX_TITLE]);
+  AQDG_DrawableWidget_SetBackgroundPenId(o, xo->penArray[AQDG_GRAPHWIDGET_PEN_IDX_BACKGROUND]);
+  AQDG_DrawableWidget_SetFontId(o, xo->fontArray[AQDG_GRAPHWIDGET_FONT_IDX_SUBTITLE]);
 
   s=AQDG_Graph_GetTitle(xo->graph);
   if (s)
@@ -136,8 +140,7 @@ void _setupObjectTree(AQDG_OBJECT *o)
 
   _setupMatrix(o);
 
-  /* TODO: add label for legend */
+  AQDG_LegendWidget_new(o, AQDG_OBJECT_OPTIONS_STRETCHX, o);
-
 }
 
 

src/lib/aqdiagram/graph/w_legend.c

@@ -0,0 +1,175 @@
+/****************************************************************************
+ * This file is part of the project AqDiagram.
+ * AqDiagram (c) by 2025 Martin Preuss, all rights reserved.
+ *
+ * The license for this file can be found in the file COPYING which you
+ * should have received along with this file.
+ ****************************************************************************/
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "./w_legend_p.h"
+#include "aqdiagram/draw/w_drawable.h"
+#include "aqdiagram/draw/w_mlayout.h"
+#include "aqdiagram/draw/w_label.h"
+
+#include <gwenhywfar/debug.h>
+
+
+
+/* ------------------------------------------------------------------------------------------------
+ * forward declarations
+ * ------------------------------------------------------------------------------------------------
+ */
+
+static GWENHYWFAR_CB void _freeData(void *bp, void *p);
+static void _setupWidget(AQDG_OBJECT *o, AQDG_WIDGET_LEGEND *xo);
+static void _addCurve(AQDG_OBJECT *o, AQDG_DRAW_CONTEXT *drawContext, const AQDG_GRAPH_CURVE *curve, int pen);
+
+
+
+/* ------------------------------------------------------------------------------------------------
+ * code
+ * ------------------------------------------------------------------------------------------------
+ */
+
+GWEN_INHERIT(AQDG_OBJECT, AQDG_WIDGET_LEGEND);
+
+
+
+AQDG_OBJECT *AQDG_LegendWidget_new(AQDG_OBJECT *parent, uint32_t options, AQDG_OBJECT *graphWidget)
+{
+  AQDG_OBJECT *o;
+  AQDG_WIDGET_LEGEND *xo;
+
+  o=AQDG_MatrixLayoutWidgetByRows_new(parent, options, AQDG_DrawableWidget_GetDrawContext(graphWidget), 5);
+  AQDG_Object_SetName(o, "LegendWidget");
+  GWEN_NEW_OBJECT(AQDG_WIDGET_LEGEND, xo);
+  GWEN_INHERIT_SETDATA(AQDG_OBJECT, AQDG_WIDGET_LEGEND, o, xo, _freeData);
+  xo->graphWidget=graphWidget;
+
+  _setupWidget(o, xo);
+
+  return o;
+}
+
+
+
+GWENHYWFAR_CB void _freeData(void *bp, void *p)
+{
+  AQDG_WIDGET_LEGEND *xo;
+
+  xo=(AQDG_WIDGET_LEGEND*) p;
+
+  GWEN_FREE_OBJECT(xo);
+}
+
+
+
+
+void _setupWidget(AQDG_OBJECT *o, AQDG_WIDGET_LEGEND *xo)
+{
+  AQDG_DRAW_CONTEXT *dc;
+  AQDG_GRAPH *graph;
+  const AQDG_GRAPH_SUBGRAPH_LIST *subGraphList;
+  const AQDG_GRAPH_SUBGRAPH *subGraph;
+  int penIdx=AQDG_GRAPHWIDGET_PEN_IDX_CURVE0;
+
+  dc=AQDG_DrawableWidget_GetDrawContext(o);
+  AQDG_DrawableWidget_SetFontId(o, AQDG_GraphWidget_GetFont(xo->graphWidget, AQDG_GRAPHWIDGET_FONT_IDX_SUBTITLE));
+
+  AQDG_DrawableWidget_new(o, 0, dc);
+  AQDG_LabelWidget_new(o, 0, dc, "Cur:");
+  AQDG_LabelWidget_new(o, AQDG_OBJECT_OPTIONS_HALIGNCENTER | AQDG_DRAWABLE_OPTIONS_JUSTIFY_HCENTER, dc, "Min:");
+  AQDG_LabelWidget_new(o, AQDG_OBJECT_OPTIONS_HALIGNCENTER | AQDG_DRAWABLE_OPTIONS_JUSTIFY_HCENTER, dc, "Avg:");
+  AQDG_LabelWidget_new(o, AQDG_OBJECT_OPTIONS_HALIGNCENTER | AQDG_DRAWABLE_OPTIONS_JUSTIFY_HCENTER, dc, "Max:");
+
+  graph=AQDG_GraphWidget_GetGraph(xo->graphWidget);
+  subGraphList=AQDG_Graph_GetSubGraphList(graph);
+  subGraph=subGraphList?AQDG_Graph_SubGraph_List_First(subGraphList):NULL;
+  while (subGraph) {
+    const AQDG_GRAPH_CURVE_LIST *curveList;
+    const AQDG_GRAPH_CURVE *curve;
+
+    curveList=AQDG_Graph_SubGraph_GetCurves(subGraph);
+    curve=curveList?AQDG_Graph_Curve_List_First(curveList):NULL;
+    while(curve) {
+      int pen;
+
+      pen=AQDG_GraphWidget_GetPen(xo->graphWidget, penIdx);
+      _addCurve(o, dc, curve, pen);
+
+      penIdx++;
+      if (penIdx>=AQDG_GRAPHWIDGET_PEN_IDX_LAST)
+        penIdx=AQDG_GRAPHWIDGET_PEN_IDX_CURVE0;
+      curve=AQDG_Graph_Curve_List_Next(curve);
+    }
+
+    subGraph=AQDG_Graph_SubGraph_List_Next(subGraph);
+  }
+}
+
+
+
+void _addCurve(AQDG_OBJECT *o, AQDG_DRAW_CONTEXT *dc, const AQDG_GRAPH_CURVE *curve, int labelPen)
+{
+  const AQDG_GRAPH_DATAPAIR_LIST *dpList;
+
+  dpList=AQDG_Graph_Curve_GetDataPairs(curve);
+  if (dpList && AQDG_Graph_DataPair_List_GetCount(dpList)) {
+    GWEN_BUFFER *dbuf;
+    const AQDG_GRAPH_DATAPAIR *dp;
+    AQDG_OBJECT *label;
+    const char *s;
+    double v;
+
+    dbuf=GWEN_Buffer_new(0, 256, 0, 1);
+
+    /* curve label */
+    s=AQDG_Graph_Curve_GetLabel(curve);
+    label=AQDG_LabelWidget_new(o, 0, dc, (s && *s)?s:"no label");
+    AQDG_Object_SetName(label, "CurveLabel");
+    AQDG_DrawableWidget_SetForegroundPenId(label, labelPen);  /* color label */
+
+    /* last value */
+    dp=AQDG_Graph_DataPair_List_Last(dpList);
+    v=AQDG_Graph_DataPair_GetValueY(dp);
+    GWEN_Buffer_AppendArgs(dbuf, "%.2f", v);
+    label=AQDG_LabelWidget_new(o, AQDG_OBJECT_OPTIONS_HALIGNRIGHT | AQDG_DRAWABLE_OPTIONS_JUSTIFY_RIGHT, dc, GWEN_Buffer_GetStart(dbuf));
+    AQDG_Object_SetName(label, "LastValueLabel");
+    GWEN_Buffer_Reset(dbuf);
+
+    /* min value */
+    GWEN_Buffer_AppendArgs(dbuf, "%.2f", AQDG_Graph_Curve_GetMinValueY(curve));
+    label=AQDG_LabelWidget_new(o, AQDG_OBJECT_OPTIONS_HALIGNRIGHT | AQDG_DRAWABLE_OPTIONS_JUSTIFY_RIGHT, dc, GWEN_Buffer_GetStart(dbuf));
+    AQDG_Object_SetName(label, "MinValueLabel");
+    GWEN_Buffer_Reset(dbuf);
+
+    /* calculate average */
+    dp=AQDG_Graph_DataPair_List_First(dpList);
+    v=0.0;
+    while(dp) {
+      v+=AQDG_Graph_DataPair_GetValueY(dp);
+      dp=AQDG_Graph_DataPair_List_Next(dp);
+    }
+    v/=(double) AQDG_Graph_DataPair_List_GetCount(dpList);
+    GWEN_Buffer_AppendArgs(dbuf, "%.2f", v);
+    label=AQDG_LabelWidget_new(o, AQDG_OBJECT_OPTIONS_HALIGNRIGHT | AQDG_DRAWABLE_OPTIONS_JUSTIFY_RIGHT, dc, GWEN_Buffer_GetStart(dbuf));
+    AQDG_Object_SetName(label, "AvgValueLabel");
+    GWEN_Buffer_Reset(dbuf);
+
+    /* max value */
+    GWEN_Buffer_AppendArgs(dbuf, "%.2f", AQDG_Graph_Curve_GetMaxValueY(curve));
+    label=AQDG_LabelWidget_new(o, AQDG_OBJECT_OPTIONS_HALIGNRIGHT | AQDG_DRAWABLE_OPTIONS_JUSTIFY_RIGHT, dc, GWEN_Buffer_GetStart(dbuf));
+    AQDG_Object_SetName(label, "MaxValueLabel");
+    GWEN_Buffer_Reset(dbuf);
+
+    GWEN_Buffer_free(dbuf);
+  }
+}
+
+
+
+

src/lib/aqdiagram/graph/w_legend.h

@@ -0,0 +1,21 @@
+/****************************************************************************
+ * This file is part of the project AqDiagram.
+ * AqDiagram (c) by 2025 Martin Preuss, all rights reserved.
+ *
+ * The license for this file can be found in the file COPYING which you
+ * should have received along with this file.
+ ****************************************************************************/
+
+#ifndef AQDG_GRAPH_W_LEGEND_H
+#define AQDG_GRAPH_W_LEGEND_H
+
+#include <aqdiagram/graph/w_graph.h>
+
+
+
+AQDG_API AQDG_OBJECT *AQDG_LegendWidget_new(AQDG_OBJECT *parent, uint32_t options, AQDG_OBJECT *graphWidget);
+
+
+
+#endif
+

src/lib/aqdiagram/graph/w_legend_p.h

@@ -0,0 +1,23 @@
+/****************************************************************************
+ * This file is part of the project AqDiagram.
+ * AqDiagram (c) by 2025 Martin Preuss, all rights reserved.
+ *
+ * The license for this file can be found in the file COPYING which you
+ * should have received along with this file.
+ ****************************************************************************/
+
+#ifndef AQDG_GRAPH_W_LEGEND_P_H
+#define AQDG_GRAPH_W_LEGEND_P_H
+
+#include <aqdiagram/graph/w_legend.h>
+
+
+typedef struct AQDG_WIDGET_LEGEND AQDG_WIDGET_LEGEND;
+struct AQDG_WIDGET_LEGEND {
+  AQDG_OBJECT *graphWidget;
+};
+
+
+
+#endif
+

src/lib/aqdiagram/graph/w_viewport.c

@@ -121,6 +121,7 @@ void _drawCurves(AQDG_OBJECT *o, AQDG_DRAW_CONTEXT *dc)
   AQDG_GRAPH *graph;
   const AQDG_GRAPH_SUBGRAPH_LIST *subGraphList;
   const AQDG_GRAPH_SUBGRAPH *subGraph;
+  int penIdx=AQDG_GRAPHWIDGET_PEN_IDX_CURVE0;
 
   xo=GWEN_INHERIT_GETDATA(AQDG_OBJECT, AQDG_WIDGET_VIEWPORT, o);
   graph=AQDG_GraphWidget_GetGraph(xo->graphObject);
@@ -132,7 +133,6 @@ void _drawCurves(AQDG_OBJECT *o, AQDG_DRAW_CONTEXT *dc)
     double maxValueX;
     double minValueY;
     double maxValueY;
-    int penIdx=AQDG_GRAPHWIDGET_PEN_IDX_CURVE0;
     const AQDG_GRAPH_CURVE_LIST *curveList;
     const AQDG_GRAPH_CURVE *curve;
 
@@ -150,6 +150,8 @@ void _drawCurves(AQDG_OBJECT *o, AQDG_DRAW_CONTEXT *dc)
       _drawCurve(o, dc, curve, minValueX, maxValueX, minValueY, maxValueY, pen);
 
       penIdx++;
+      if (penIdx>=AQDG_GRAPHWIDGET_PEN_IDX_LAST)
+        penIdx=AQDG_GRAPHWIDGET_PEN_IDX_CURVE0;
       curve=AQDG_Graph_Curve_List_Next(curve);
     }
 

src/lib/aqdiagram/libtest.c

@@ -177,10 +177,10 @@ int test4()
 
   g=AQDG_TimeGraph_new("Title", "Subtitle", "Value", "mm", 0);
   dpList=_mkTestData1();
-  AQDG_TimeGraph_AddCurve(g, "Testdata", AQDG_GRAPH_TYPE_LINE, dpList);
+  AQDG_TimeGraph_AddCurve(g, "Testdata1", AQDG_GRAPH_TYPE_LINE, dpList);
 
   dpList=_mkTestData2();
-  AQDG_TimeGraph_AddCurve(g, "Testdata", AQDG_GRAPH_TYPE_POINTS, dpList);
+  AQDG_TimeGraph_AddCurve(g, "Testdata2", AQDG_GRAPH_TYPE_POINTS, dpList);
 
   AQDG_TimeGraph_SetupTicks(g);
 

src/lib/aqdiagram/placement/0BUILD

@@ -60,7 +60,7 @@
     </headers>
 
 
-    <headers dist="true" install="$(pkgincludedir)">
+    <headers dist="true" install="$(pkgincludedir)/placement">
       layout.h
       o_layout.h
       o_hlayout.h