X-Git-Url: http://source.jalview.org/gitweb/?p=jalview.git;a=blobdiff_plain;f=src%2Fjalview%2Fgui%2FAlignmentPanel.java;h=b57bc0860f5eccf3141948dc43ea0627e16f2185;hp=d99bd1d1358baa6658b616de14cff231db28da7a;hb=8594f8fc93ae2003f0587a5b3b01d56f41216fac;hpb=d0520ee1359d7300dc5e69b6159ccd7488bd3a95

diff --git a/src/jalview/gui/AlignmentPanel.java b/src/jalview/gui/AlignmentPanel.java
index d99bd1d..b57bc08 100644
--- a/src/jalview/gui/AlignmentPanel.java
+++ b/src/jalview/gui/AlignmentPanel.java
@@ -568,17 +568,24 @@ public class AlignmentPanel extends GAlignmentPanel implements
   {
     // BH 2018.04.18 comment: addNotify() is not appropriate here. We
     // are not changing ancestors, and keyboard action listeners do
-    // not need to be reset. addNotify() is a very expensive operation,
+    // not need to be reset, and most importantly, we can't be sure we are actually
+    // connected to resources. 
+    
+    // addNotify() is a very expensive operation,
     // requiring a full re-layout of all parents and children.
+    
     // Note in JComponent:
+    
     // This method is called by the toolkit internally and should
     // not be called directly by programs.
+    
     // I note that addNotify() is called in several areas of Jalview.
 
     int annotationHeight = getAnnotationPanel().adjustPanelHeight();
     annotationHeight = getAnnotationPanel()
             .adjustForAlignFrame(adjustPanelHeight, annotationHeight);
 
+    // BH no!!
     hscroll.addNotify();
     annotationScroller.setPreferredSize(
             new Dimension(annotationScroller.getWidth(), annotationHeight));
@@ -600,8 +607,13 @@ public class AlignmentPanel extends GAlignmentPanel implements
    */
   public void updateLayout()
   {
-    if (getTopLevelAncestor() == null)
-      return;
+    // BH 2020.06.09 avoiding negative values for SequencePanel and SeqCanvas
+    // dimensions.
+    
+     if (getTopLevelAncestor() == null)
+     return;
+
+    
     ViewportRanges ranges = av.getRanges();
     fontChanged();
     setAnnotationVisible(av.isShowAnnotation());
@@ -645,8 +657,14 @@ public class AlignmentPanel extends GAlignmentPanel implements
 
     idSpaceFillerPanel1.setVisible(!wrap);
 
-    
-// BH not added to anything yet!    repaint();
+    // System.out.println("ap dim = " + getSize());
+
+    // these values will go negative if getSize() returns (0,0):
+
+    // System.out.println("seqpan dim = " + getSeqPanel().getSize());
+    // System.out.println("seqcan dim = " + getSeqPanel().seqCanvas.getSize());
+
+    // BH not added to anything yet! repaint();
   }
 
   /**
@@ -660,8 +678,6 @@ public class AlignmentPanel extends GAlignmentPanel implements
    */
   public void setScrollValues(int x, int y)
   {
-    
-    System.out.println("AlignmentPanel.setScrollValues " + x + "_" + y);
 
     if (av == null || av.getAlignment() == null)
     {
@@ -679,20 +695,10 @@ public class AlignmentPanel extends GAlignmentPanel implements
       
       hextent = Math.min(getSeqPanel().seqCanvas.getWidth() / av.getCharWidth(),  width);
       vextent = Math.min(getSeqPanel().seqCanvas.getHeight() / av.getCharHeight(),  height);
-
-      if (hextent < 0)
-      System.out.println("AlignmentPanel.setScrollValues  found hext=" + hextent + " vext=" +  vextent + " width=" + width + " height=" + height 
-              );
- 
   
       x = Math.max(0, Math.min(x,  width - hextent));
       y = Math.max(0, Math.min(y,  height - vextent));
       
-
-      System.out.println("AlignmentPanel.setScrollValues resetting these to " + x + "_" + y 
-              + " based on hext=" + hextent + " vext=" +  vextent + " width=" + width + " height=" + height 
-              );
-
       updateRanges(x, y);
       updateScrollBars(x, y, width, height);
     }