X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fgui%2FSplitFrame.java;h=a0d31cf56ed9b6943c28b452e368caaf24224447;hb=dc005e4ed3722c21925c026570b7219913f787e7;hp=d28bb14a13861824a7de0b58f7067641de29f19a;hpb=fdebbbbada35176910e5d8d1065c038ca1e143b2;p=jalview.git

diff --git a/src/jalview/gui/SplitFrame.java b/src/jalview/gui/SplitFrame.java
index d28bb14..a0d31cf 100644
--- a/src/jalview/gui/SplitFrame.java
+++ b/src/jalview/gui/SplitFrame.java
@@ -194,12 +194,16 @@ public class SplitFrame extends GSplitFrame implements SplitContainerI
   }
 
   /**
-   * Adjust the divider for a sensible split of the real estate (for example,
+   * Adjusts the divider for a sensible split of the real estate (for example,
    * when many transcripts are shown with a single protein). This should only be
    * called after the split pane has been laid out (made visible) so it has a
-   * height.
+   * height. The aim is to avoid unnecessary vertical scroll bars, while
+   * ensuring that at least 2 sequences are visible in each panel.
+   * <p>
+   * Once laid out, the user may choose to customise as they wish, so this
+   * method is not called again after the initial layout.
    */
-  protected void adjustDivider()
+  protected void adjustInitialLayout()
   {
     AlignFrame topFrame = (AlignFrame) getTopFrame();
     AlignFrame bottomFrame = (AlignFrame) getBottomFrame();
@@ -224,31 +228,27 @@ public class SplitFrame extends GSplitFrame implements SplitContainerI
     int bottomCharHeight = bottomViewport.getViewStyle().getCharHeight();
 
     /*
-     * calculate the minimum ratio that leaves at least 
-     * two sequences visible in the top panel
+     * calculate the minimum ratio that leaves at least the height 
+     * of two sequences (after rounding) visible in the top panel
      */
     int topPanelHeight = topFrame.getHeight();
+    int bottomPanelHeight = bottomFrame.getHeight();
     int topSequencesHeight = topFrame.alignPanel.getSeqPanel().seqCanvas
             .getHeight();
     int topPanelMinHeight = topPanelHeight
-            - Math.max(0,
-                    topSequencesHeight - 2 * topViewport.getCharHeight());
-    int myHeight = getHeight();
-    double minRatio = topPanelMinHeight / (double) myHeight;
+            - Math.max(0, topSequencesHeight - 3 * topCharHeight);
+    double totalHeight = (double) topPanelHeight + bottomPanelHeight;
+    double minRatio = topPanelMinHeight / totalHeight;
 
     /*
-     * calculate the maximum ratio that leaves at least 
-     * two sequences visible in the bottom panel
+     * calculate the maximum ratio that leaves at least the height 
+     * of two sequences (after rounding) visible in the bottom panel
      */
-    int bottomPanelHeight = bottomFrame.getHeight();
     int bottomSequencesHeight = bottomFrame.alignPanel.getSeqPanel().seqCanvas
             .getHeight();
     int bottomPanelMinHeight = bottomPanelHeight
-            - Math.max(
-                    0,
-                    bottomSequencesHeight - 2
-                            * bottomViewport.getCharHeight());
-    double maxRatio = (myHeight - bottomPanelMinHeight) / (double) myHeight;
+            - Math.max(0, bottomSequencesHeight - 3 * bottomCharHeight);
+    double maxRatio = (totalHeight - bottomPanelMinHeight) / totalHeight;
 
     /*
      * estimate ratio of (topFrameContent / bottomFrameContent)
@@ -268,7 +268,7 @@ public class SplitFrame extends GSplitFrame implements SplitContainerI
      */
     ratio = Math.min(ratio, maxRatio);
     ratio = Math.max(ratio, minRatio);
-    // setRelativeDividerLocation(ratio);
+    setRelativeDividerLocation(ratio);
   }
 
   /**
@@ -539,7 +539,7 @@ public class SplitFrame extends GSplitFrame implements SplitContainerI
       topFrame.setDisplayedView(newTopPanel);
     }
 
-    newBottomPanel.av.viewName = newTopPanel.av.viewName;
+    newBottomPanel.av.setViewName(newTopPanel.av.getViewName());
     newTopPanel.av.setCodingComplement(newBottomPanel.av);
 
     /*