From 6ba351cfc691c52c5e9699cf8a759c567f375004 Mon Sep 17 00:00:00 2001
From: ehofman <ehofman>
Date: Thu, 22 Jan 2004 18:42:42 +0000
Subject: [PATCH] Make it possible to truncate the result of a number-value
 text chunk calculation rather than rounding it by specifying
 <truncate>true</truncate> inside the chunk.

---
 src/Cockpit/panel.cxx    | 9 ++++++---
 src/Cockpit/panel.hxx    | 4 +++-
 src/Cockpit/panel_io.cxx | 3 ++-
 3 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/src/Cockpit/panel.cxx b/src/Cockpit/panel.cxx
index de9a78778..25d6066ca 100644
--- a/src/Cockpit/panel.cxx
+++ b/src/Cockpit/panel.cxx
@@ -1092,8 +1092,9 @@ FGTextLayer::Chunk::Chunk (const string &text, const string &fmt)
 }
 
 FGTextLayer::Chunk::Chunk (ChunkType type, const SGPropertyNode * node,
-			   const string &fmt, float mult, float offs)
-  : _type(type), _fmt(fmt), _mult(mult), _offs(offs)
+			   const string &fmt, float mult, float offs,
+                           bool truncation)
+  : _type(type), _fmt(fmt), _mult(mult), _offs(offs), _trunc(truncation)
 {
   if (_fmt.empty()) {
     if (type == TEXT_VALUE)
@@ -1117,7 +1118,9 @@ FGTextLayer::Chunk::getValue () const
       sprintf(_buf, _fmt.c_str(), _node->getStringValue());
       break;
     case DOUBLE_VALUE:
-      sprintf(_buf, _fmt.c_str(), _offs + _node->getFloatValue() * _mult);
+      double d = _offs + _node->getFloatValue() * _mult;
+      if (_trunc)  d = truncf(d);
+      sprintf(_buf, _fmt.c_str(), d);
       break;
     }
     return _buf;
diff --git a/src/Cockpit/panel.hxx b/src/Cockpit/panel.hxx
index 01ccc469d..b99889ce1 100644
--- a/src/Cockpit/panel.hxx
+++ b/src/Cockpit/panel.hxx
@@ -492,7 +492,8 @@ public:
   public:
     Chunk (const string &text, const string &fmt = "%s");
     Chunk (ChunkType type, const SGPropertyNode * node,
-	   const string &fmt = "", float mult = 1.0, float offs = 0.0);
+	   const string &fmt = "", float mult = 1.0, float offs = 0.0,
+           bool truncation = false);
 
     const char * getValue () const;
   private:
@@ -502,6 +503,7 @@ public:
     string _fmt;
     float _mult;
     float _offs;
+    bool _trunc;
     mutable char _buf[1024];
   };
 
diff --git a/src/Cockpit/panel_io.cxx b/src/Cockpit/panel_io.cxx
index 55dcb52ac..86e01b758 100644
--- a/src/Cockpit/panel_io.cxx
+++ b/src/Cockpit/panel_io.cxx
@@ -366,9 +366,10 @@ readTextChunk (const SGPropertyNode * node)
     string propName = node->getStringValue("property");
     float scale = node->getFloatValue("scale", 1.0);
     float offset = node->getFloatValue("offset", 0.0);
+    bool truncation = node->getFloatValue("truncate", false);
     SGPropertyNode * target = fgGetNode(propName.c_str(), true);
     chunk = new FGTextLayer::Chunk(FGTextLayer::DOUBLE_VALUE, target,
-				   format, scale, offset);
+				   format, scale, offset, truncation);
   }
 
 				// Unknown type.
-- 
2.39.5