From 2c22cfd94a6b46515f4dd23ecb5f5589c31e2b7d Mon Sep 17 00:00:00 2001
From: Matthias Melcher <fltk@matthiasm.com>
Date: Wed, 23 Aug 2006 14:37:28 +0000
Subject: - Fixed floating point value formatting for Fl_Spinner (STR #1331)

git-svn-id: file:///fltk/svn/fltk/branches/branch-1.1@5348 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
---
 FL/Fl_Spinner.H | 32 +++++++++++++++++++++++---------
 1 file changed, 23 insertions(+), 9 deletions(-)

(limited to 'FL')

diff --git a/FL/Fl_Spinner.H b/FL/Fl_Spinner.H
index c475681de..a2da3a3cf 100644
--- a/FL/Fl_Spinner.H
+++ b/FL/Fl_Spinner.H
@@ -56,6 +56,7 @@ class Fl_Spinner : public Fl_Group
 		up_button_,		// Up button
 		down_button_;		// Down button
 
+
   static void	sb_cb(Fl_Widget *w, Fl_Spinner *sb) {
 		  double v;		// New value
 
@@ -93,7 +94,20 @@ class Fl_Spinner : public Fl_Group
   void		update() {
 		  char s[255];		// Value string
 
-		  sprintf(s, format_, value_);
+                  if (format_[0]=='%'&&format_[1]=='.'&&format_[2]=='*') {  // precision argument
+                    // this code block is a simplified version of
+                    // Fl_Valuator::format() and works well (but looks ugly)
+                    int c = 0;
+                    char temp[64], *sp = temp;
+                    sprintf(temp, "%.12f", step_);
+                    while (*sp) sp++;
+                    sp--;
+                    while (sp>temp && *sp=='0') sp--;
+                    while (sp>temp && (*sp>='0' && *sp<='9')) { sp--; c++; }
+		    sprintf(s, format_, c, value_);
+                  } else {
+		    sprintf(s, format_, value_);
+                  }
 		  input_.value(s);
 		}
 
@@ -144,7 +158,7 @@ class Fl_Spinner : public Fl_Group
 		                      H / 2 + 2, H / 2);
 		}
   double	step() const { return (step_); }
-  void		step(double s) { step_ = s; }
+  void		step(double s) { step_ = s; update(); }
   Fl_Color	textcolor() const {
 		  return (input_.textcolor());
 		}
@@ -165,13 +179,13 @@ class Fl_Spinner : public Fl_Group
 		}
   uchar		type() const { return (input_.type()); }
   void		type(uchar v) { 
-    if (v==FL_FLOAT_INPUT) {
-      format("%g");
-    } else {
-      format("%.0f");
-    }
-    input_.type(v); 
-  }
+                  if (v==FL_FLOAT_INPUT) {
+                    format("%.*f");
+                  } else {
+                    format("%.0f");
+                  }
+                  input_.type(v); 
+                }
   double	value() const { return (value_); }
   void		value(double v) { value_ = v; update(); }
 };
-- 
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