Fixed divide by zero in Fl_Scrollbar found by Harm-Jan Zwinderman. This

happened if minimum == maximum. git-svn-id: file:///fltk/svn/fltk/branches/branch-1.0@987 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
fltk · Jan 17, 2000 · ecc9186 · ecc9186
1 parent 685d58c
commit ecc9186
Showing 1 changed file with 12 additions and 4 deletions.
diff --git a/src/Fl_Scrollbar.cxx b/src/Fl_Scrollbar.cxx
@@ -1,5 +1,5 @@
 //
-// "$Id: Fl_Scrollbar.cxx,v 1.7.2.5 2000/01/16 04:30:37 bill Exp $"
+// "$Id: Fl_Scrollbar.cxx,v 1.7.2.6 2000/01/17 20:40:12 bill Exp $"
 //
 // Scroll bar widget for the Fast Light Tool Kit (FLTK).
 //
@@ -75,7 +75,11 @@ int Fl_Scrollbar::handle(int event) {
     else {
       int sliderx;
       int S = int(slider_size()*W+.5);
-      double val = (value()-minimum())/(maximum()-minimum());
+      double val;
+      if (minimum() == maximum())
+	val = 0.5;
+      else
+	val = (value()-minimum())/(maximum()-minimum());
       if (val >= 1.0) sliderx = W-S;
       else if (val <= 0.0) sliderx = 0;
       else sliderx = int(val*(W-S)+.5);
@@ -91,7 +95,11 @@ int Fl_Scrollbar::handle(int event) {
     else {
       int slidery;
       int S = int(slider_size()*H+.5);
-      double val = (value()-minimum())/(maximum()-minimum());
+      double val;
+      if (minimum() == maximum())
+	val = 0.5;
+      else
+	val = (value()-minimum())/(maximum()-minimum());
       if (val >= 1.0) slidery = H-S;
       else if (val <= 0.0) slidery = 0;
       else slidery = int(val*(H-S)+.5);
@@ -241,5 +249,5 @@ Fl_Scrollbar::Fl_Scrollbar(int X, int Y, int W, int H, const char* L)
 }
 
 //
-// End of "$Id: Fl_Scrollbar.cxx,v 1.7.2.5 2000/01/16 04:30:37 bill Exp $".
+// End of "$Id: Fl_Scrollbar.cxx,v 1.7.2.6 2000/01/17 20:40:12 bill Exp $".
 //