added AQDG_Graph_Axis_AddMargins()

src/lib/aqdiagram/graph/axis.t2d

@@ -633,6 +633,43 @@
           </content>
         </inline>
 
+
+        <inline loc="end" access="public">
+          <content>
+             $(api) void $(struct_prefix)_AddMargins(AQDG_GRAPH_AXIS *axis, double percent);
+          </content>
+        </inline>
+
+        <inline loc="code">
+          <content>
+             void $(struct_prefix)_AddMargins(AQDG_GRAPH_AXIS *axis, double percent)
+             {
+               double vMax;
+               double vMin;
+               double vDiff;
+             
+               vMin=axis-&gt;minValue;
+               vMax=axis-&gt;maxValue;
+               vDiff=vMax-vMin;
+               if (vDiff==0.0) {
+                 vDiff=vMax;
+                 if (vDiff==0.0)
+                   vDiff=1.0;
+               }
+               if (vDiff>0.0) {
+                 double vDiffForPercent;
+             
+                 vDiffForPercent=vDiff*(percent/100.0);
+                 vMin-=vDiffForPercent;
+                 vMax+=vDiffForPercent;
+                 axis-&gt;minValue=vMin;
+                 axis-&gt;maxValue=vMax;
+               }
+             }
+          </content>
+        </inline>
+
+
       </inlines>
 
     </lang>