X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fgui%2FSlider.java;h=184304cfbf0f311f80f0b88b20c7f83e04bcd049;hb=57738a1f3c19b1c3a00bd3ac5108f8cd0af32f99;hp=b913ba0ea3cf518b34ba5382eb835c90080453ab;hpb=b645f92e338a4eea33bd2813c27917fb0fe5cc4d;p=jalview.git

diff --git a/src/jalview/gui/Slider.java b/src/jalview/gui/Slider.java
index b913ba0..184304c 100644
--- a/src/jalview/gui/Slider.java
+++ b/src/jalview/gui/Slider.java
@@ -16,6 +16,12 @@ import javax.swing.JSlider;
 public class Slider extends JSlider
 {
   /*
+   * the number of nominal positions the slider represents
+   * (higher number = more fine-grained positioning)
+   */
+  private static final int SCALE_TICKS = 1000;
+
+  /*
    * 'true' value corresponding to zero on the slider
    */
   private float trueMin;
@@ -29,7 +35,7 @@ public class Slider extends JSlider
    * scaleFactor applied to true value range to give a
    * slider range of 0 - 100
    */
-  private int sliderScaleFactor;
+  private float sliderScaleFactor;
 
   /**
    * Constructor that rescales min - max to 0 - 100 for the slider
@@ -57,7 +63,7 @@ public class Slider extends JSlider
     trueMin = min;
     trueMax = max;
     setMinimum(0);
-    sliderScaleFactor = (int) (100f / (max - min));
+    sliderScaleFactor = SCALE_TICKS / (max - min);
     int sliderMax = (int) ((max - min) * sliderScaleFactor);
     setMaximum(sliderMax);
     setSliderValue(value);
@@ -75,7 +81,7 @@ public class Slider extends JSlider
      */
     int value = getValue();
     return value == getMaximum() ? trueMax
-            : value / (float) sliderScaleFactor + trueMin;
+            : value / sliderScaleFactor + trueMin;
   }
 
   /**
@@ -85,12 +91,12 @@ public class Slider extends JSlider
    */
   public void setSliderValue(float value)
   {
-    setValue((int) ((value - trueMin) * sliderScaleFactor));
+    setValue(Math.round((value - trueMin) * sliderScaleFactor));
   }
 
   /**
-   * Answers the value of the slider position as a percentage between minimum and
-   * maximum of its range
+   * Answers the value of the slider position as a percentage between minimum
+   * and maximum of its range
    * 
    * @return
    */