Function brow_GetPreviousSibling implemented

xtt/lib/flow/src/flow_array.cpp

@@ -481,6 +481,45 @@ int FlowArray::brow_get_next_sibling( FlowArrayElem *element,
    return FLOW__NONEXTSIBLING;
 }
 
+int FlowArray::brow_get_previous_sibling( FlowArrayElem *element, 
+		FlowArrayElem **sibling)
+{
+  int		i;
+  int		idx;
+  int		found;
+  int		level;
+
+  found = 0;
+  for ( i = 0; i < a_size; i++)
+  {
+    if ( *(a + i) == element)
+    {
+      idx = i;
+      found = 1;
+      break;
+    }
+  }
+  if ( !found)
+    return FLOW__NOELEM;
+
+  if ( idx == 0)
+    return FLOW__NONEXTSIBLING;
+
+  // Return previous element of the same level
+  level = ((FlowNode *)a[idx])->get_level();
+  for ( i = idx - 1; i <= 0; i--)
+  { 
+    if (((FlowNode *)a[i])->get_level() == level)
+    {
+      *sibling = a[i];
+      return 1;
+    }
+    if (((FlowNode *)a[i])->get_level() < level)
+      return FLOW__NONEXTSIBLING;
+   }
+   return FLOW__NONEXTSIBLING;
+}
+
 void FlowArray::zoom()
 {
   int		i;

xtt/lib/flow/src/flow_array.h

@@ -65,6 +65,8 @@ class FlowArray {
     int brow_get_child( FlowArrayElem *element, FlowArrayElem **child);
     int brow_get_next_sibling( FlowArrayElem *element, 
 		FlowArrayElem **sibling);
+    int brow_get_previous_sibling( FlowArrayElem *element, 
+		FlowArrayElem **sibling);
     void move_widgets( int x, int y);
     int get_first( FlowArrayElem **first);
     int get_last( FlowArrayElem **last);

xtt/lib/flow/src/flow_browapi.cpp

@@ -668,6 +668,12 @@ int brow_GetNextSibling( brow_tCtx ctx, brow_tObject object,
   return ctx->get_next_sibling( (FlowArrayElem *)object, (FlowArrayElem **)sibling);
 }
 
+int brow_GetPreviousSibling( brow_tCtx ctx, brow_tObject object, 
+		brow_tObject *sibling)
+{
+  return ctx->get_previous_sibling( (FlowArrayElem *)object, (FlowArrayElem **)sibling);
+}
+
 int brow_IsVisible( brow_tCtx ctx, brow_tObject object)
 {
   return ctx->is_visible( (FlowArrayElem *)object);

xtt/lib/flow/src/flow_browapi.h

@@ -196,6 +196,8 @@ int brow_GetParent( brow_tCtx ctx, brow_tObject object, brow_tObject *parent);
 int brow_GetChild( brow_tCtx ctx, brow_tObject object, brow_tObject *child);
 int brow_GetNextSibling( brow_tCtx ctx, brow_tObject object, 
 		brow_tObject *sibling);
+int brow_GetPreviousSibling( brow_tCtx ctx, brow_tObject object, 
+		brow_tObject *sibling);
 int brow_IsVisible( brow_tCtx ctx, brow_tObject object);
 int brow_CreateSecondaryCtx( brow_tCtx ctx, brow_tCtx *secondary_ctx,
         int (*init_proc)(brow_tCtx ctx, void *client_data),

xtt/lib/flow/src/flow_browctx.h

@@ -35,6 +35,8 @@ class BrowCtx : public FlowCtx {
     		{ return a.brow_get_child( element, child);};
     int get_next_sibling( FlowArrayElem *element, FlowArrayElem **sibling)
     		{ return a.brow_get_next_sibling( element, sibling);};
+    int get_previous_sibling( FlowArrayElem *element, FlowArrayElem **sibling)
+    		{ return a.brow_get_previous_sibling( element, sibling);};
     int is_visible( FlowArrayElem *element);
     void center_object( FlowArrayElem *object, double factor);
     ~BrowCtx() {};