X-Git-Url: http://source.jalview.org/gitweb/?a=blobdiff_plain;f=src%2Fjalview%2Fgui%2FSeqCanvas.java;h=de421ed2eb14ff44b12042f87edc8771fa1f9fbb;hb=4532dfefeac026198bfea1b9dbe84186e870bfc8;hp=d3e5d6d68d3ee6a25c6fc01c056671600f355d38;hpb=c59fb56cb143b05c5643a71f5b39996ac1cd2fef;p=jalview.git

diff --git a/src/jalview/gui/SeqCanvas.java b/src/jalview/gui/SeqCanvas.java
index d3e5d6d..de421ed 100755
--- a/src/jalview/gui/SeqCanvas.java
+++ b/src/jalview/gui/SeqCanvas.java
@@ -53,6 +53,57 @@ public class SeqCanvas extends JPanel
   }
 
 
+public void fastPaint(int horizontal, int vertical)
+{
+    if(horizontal==0 && vertical==0)
+   {
+     return;
+   }
+
+
+   if (img==null || paintFlag)
+   {
+      repaint();
+      return;
+   }
+
+    gg.copyArea( 0,0, imgWidth, imgHeight, -horizontal*av.charWidth, -vertical*av.charHeight );
+
+ int sr=av.startRes, er=av.endRes+1, ss = av.startSeq, es = av.endSeq, transX=0, transY = 0;
+ if(horizontal>0) // scrollbar pulled right, image to the left
+ {
+   transX = (er-sr-horizontal)*av.charWidth;
+   sr = er - horizontal ;
+ }
+ else if(horizontal<0)
+ {
+   er = sr-horizontal;
+ }
+
+
+
+
+ if(vertical>0)    // scroll down
+ {
+   transY = imgHeight - vertical*av.charHeight;
+   ss = es - vertical;
+ }
+ else if(vertical<0)
+ {
+
+     es = ss-vertical;
+
+ }
+
+    gg.translate(transX, transY);
+
+    drawPanel(gg, sr,er,ss,es,sr,ss,0);
+
+    gg.translate( -transX, -transY );
+    getGraphics().drawImage(img,0,0,this);
+
+}
+
 /**
  * Definitions of startx and endx (hopefully):
  * SMJS This is what I'm working towards!
@@ -66,17 +117,20 @@ public class SeqCanvas extends JPanel
 
   public void paintComponent(Graphics g)
   {
+    // this draws the whole of the alignment
 
-    if (img==null ||  imgWidth!=getWidth() || imgHeight!=getHeight() || paintFlag)
-    {
       imgWidth  = getWidth();
       imgHeight = getHeight();
+
+      imgWidth -= imgWidth%av.charWidth;
+      imgHeight-= imgHeight%av.charHeight;
+
       img = createImage(imgWidth,imgHeight);
       gg  = (Graphics2D)img.getGraphics();
       gg.setFont(av.getFont());
       gg.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
+      gg.setClip(0,0,imgWidth, imgHeight);
       paintFlag = false;
-    }
 
 
     chunkWidth  =   getWidth()/av.charWidth;
@@ -85,8 +139,8 @@ public class SeqCanvas extends JPanel
     av.setChunkHeight(chunkHeight);
     av.setChunkWidth(chunkWidth);
 
-    gg.setColor(Color.WHITE);
-    gg.fillRect(0,0,imgWidth,imgHeight);
+    g.setColor(Color.WHITE);
+    g.fillRect(0,0,getWidth(), getHeight());
 
     if (av.getWrapAlignment())
       drawWrappedPanel(gg, getWidth(), getHeight(), av.startRes);
@@ -217,7 +271,7 @@ public class SeqCanvas extends JPanel
               inGroup = true;
               if (group == av.getSelectionGroup())
               {
-                g.setStroke(new BasicStroke(2, BasicStroke.CAP_BUTT, BasicStroke.JOIN_ROUND, 3f, new float[]{5f,2f,2f}, 0f ));
+            //    g.setStroke(new BasicStroke(1, BasicStroke.CAP_BUTT, BasicStroke.JOIN_ROUND, 3f, new float[]{5f,2f,2f}, 0f ));
                 g.setColor(Color.RED);
               }
               else