From 4532dfefeac026198bfea1b9dbe84186e870bfc8 Mon Sep 17 00:00:00 2001
From: amwaterhouse <Andrew Waterhouse>
Date: Wed, 6 Apr 2005 11:38:59 +0000
Subject: [PATCH] Fast paint method implemented

---
 src/jalview/gui/AlignmentPanel.java  |    8 ++-
 src/jalview/gui/AnnotationPanel.java |   81 +++++++++++++++++++++--------
 src/jalview/gui/IdCanvas.java        |   94 +++++++++++++++++++++++++---------
 src/jalview/gui/SeqCanvas.java       |   66 +++++++++++++++++++++---
 4 files changed, 196 insertions(+), 53 deletions(-)

diff --git a/src/jalview/gui/AlignmentPanel.java b/src/jalview/gui/AlignmentPanel.java
index 248fb3d..04b596a 100755
--- a/src/jalview/gui/AlignmentPanel.java
+++ b/src/jalview/gui/AlignmentPanel.java
@@ -280,7 +280,6 @@ public class AlignmentPanel extends GAlignmentPanel implements AdjustmentListene
        return false;
       vscroll.setValue(vscroll.getValue() + 1);
     }
-
     return true;
   }
 
@@ -333,6 +332,8 @@ public class AlignmentPanel extends GAlignmentPanel implements AdjustmentListene
 
   public void adjustmentValueChanged(AdjustmentEvent evt)
   {
+    int oldX = av.getStartRes();
+    int oldY = av.getStartSeq();
 
     if (evt.getSource() == hscroll)
     {
@@ -359,7 +360,10 @@ public class AlignmentPanel extends GAlignmentPanel implements AdjustmentListene
     if(overviewPanel!=null)
       overviewPanel.setBoxPosition();
 
-    repaint();
+    seqPanel.seqCanvas.fastPaint(av.getStartRes()-oldX, av.getStartSeq()-oldY);
+    idPanel.idCanvas.fastPaint( av.getStartSeq()-oldY );
+    scalePanel.repaint();
+    annotationPanel.fastPaint(av.getStartRes()-oldX);
 
   }
 
diff --git a/src/jalview/gui/AnnotationPanel.java b/src/jalview/gui/AnnotationPanel.java
index 2874494..c94a5a8 100755
--- a/src/jalview/gui/AnnotationPanel.java
+++ b/src/jalview/gui/AnnotationPanel.java
@@ -23,7 +23,12 @@ public class AnnotationPanel extends JPanel implements MouseListener, MouseMotio
   static Color HELIX_COLOUR = Color.red.darker();
   static Color SHEET_COLOUR = Color.green.darker().darker();
 
-  BufferedImage bi;
+
+  BufferedImage image;
+  Graphics2D gg;
+  FontMetrics fm;
+  int imgWidth=0;
+
 
 
 
@@ -312,27 +317,63 @@ public class AnnotationPanel extends JPanel implements MouseListener, MouseMotio
 
   public void paintComponent(Graphics g)
   {
-    if(bi==null
-       || bi.getWidth()!=ap.annotationPanel.getWidth()
-       || bi.getHeight()!=ap.annotationPanel.getHeight())
-    {
-      bi = new BufferedImage(ap.annotationPanel.getWidth(),
-                           ap.annotationPanel.getHeight(),
-                           BufferedImage.TYPE_INT_RGB);
-    }
+    g.setColor(Color.white);
+    g.fillRect(0,0,getWidth(), getHeight());
+
+    imgWidth = (av.endRes-av.startRes+1) *av.charWidth;
+
+    image = new BufferedImage(imgWidth,
+                                ap.annotationPanel.getHeight(),
+                                BufferedImage.TYPE_INT_RGB);
+      gg = (Graphics2D) image.getGraphics();
+      gg.setColor(Color.white);
+      gg.fillRect(0, 0, imgWidth, getHeight());
+      gg.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
+                          RenderingHints.VALUE_ANTIALIAS_ON);
+      fm = gg.getFontMetrics();
+      gg.setFont(av.getFont());
 
-    drawComponent( (Graphics2D)bi.getGraphics() );
-    g.drawImage( bi, 0, 0, this);
+
+    drawComponent( gg, av.startRes, av.endRes+1);
+    g.drawImage( image, 0, 0, this);
   }
 
-  public void drawComponent(Graphics2D g)
+  public void fastPaint(int horizontal)
+{
+  if(image==null || horizontal ==0)
   {
-    g.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
-    FontMetrics fm = g.getFontMetrics();
-    g.setFont(av.getFont());
-    g.setColor(Color.white);
-    g.fillRect(0,0,getWidth(),getHeight());
+    repaint();
+    return;
+  }
+
+  gg.copyArea( 0,0, imgWidth, getHeight(), -horizontal*av.charWidth, 0 );
+  int sr=av.startRes, er=av.endRes+1, transX=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;
+  }
+
+
+  gg.translate(transX, 0);
+
+  drawComponent(gg, sr, er);
+
+  gg.translate( -transX, 0 );
+
+  getGraphics().drawImage(image, 0, 0, this);
+}
+
+
+  public void drawComponent(Graphics2D g, int startRes, int endRes)
+  {
+    g.setColor(Color.white);
+    g.fillRect(0,0,(endRes-startRes) *av.charWidth, getHeight());
     if(av.alignment.getAlignmentAnnotation()==null || av.alignment.getAlignmentAnnotation().length<1)
     {
       g.setColor(Color.black);
@@ -366,11 +407,11 @@ public class AnnotationPanel extends JPanel implements MouseListener, MouseMotio
       else
         iconOffset = 0;
 
-      for(j=av.startRes; j<av.endRes+1; j++)
+      for(j=startRes; j<endRes; j++)
       {
         validRes = row.annotations[j]==null?false:true;
 
-       x = (j-av.getStartRes())*av.charWidth;
+       x = (j-startRes)*av.charWidth;
 
 
        if(activeRow==i)
@@ -383,7 +424,7 @@ public class AnnotationPanel extends JPanel implements MouseListener, MouseMotio
            {
              int v = Integer.parseInt(activeRes.get(n).toString()) ;
              if (v == j)
-               g.fillRect( (j-av.getStartRes()) * av.charWidth, y, av.charWidth, row.height);
+               g.fillRect( (j-startRes) * av.charWidth, y, av.charWidth, row.height);
            }
        }
 
diff --git a/src/jalview/gui/IdCanvas.java b/src/jalview/gui/IdCanvas.java
index 2aa39a7..cb7fddf 100755
--- a/src/jalview/gui/IdCanvas.java
+++ b/src/jalview/gui/IdCanvas.java
@@ -2,7 +2,7 @@ package jalview.gui;
 
 import java.awt.*;
 import java.awt.Graphics2D.*;
-
+import java.awt.image.*;
 import javax.swing.*;
 import jalview.datamodel.*;
 import jalview.analysis.*;
@@ -14,6 +14,9 @@ public class IdCanvas extends JPanel
 
   protected int     maxIdLength = -1;
   protected String  maxIdStr    = null;
+  BufferedImage image;
+  Graphics2D gg;
+  int imgHeight=0;
 
   public IdCanvas(AlignViewport av)
   {
@@ -22,7 +25,7 @@ public class IdCanvas extends JPanel
     PaintRefresher.Register(this);
   }
 
-  public void drawIdString(Graphics gg,SequenceI s,int i, int starty, int ypos) {
+  public void drawIdString(Graphics2D gg,SequenceI s,int i, int starty, int ypos) {
       int charHeight = av.getCharHeight();
 
 
@@ -44,39 +47,79 @@ public class IdCanvas extends JPanel
 
   }
 
-  public void paintComponent(Graphics g) {
-    Graphics2D gg = (Graphics2D)g;
-    gg.setRenderingHint(RenderingHints.KEY_ANTIALIASING,RenderingHints.VALUE_ANTIALIAS_ON);
-    AlignmentI al         = av.alignment;
-    int        charHeight = av.charHeight;
-    Font italic = new Font(av.getFont().getName(), Font.ITALIC, av.getFont().getSize());
+  public void fastPaint(int vertical)
+  {
+    if(image==null)
+    {
+      repaint();
+      return;
+    }
+
+    gg.copyArea( 0,0, getWidth(), imgHeight, 0, -vertical*av.charHeight );
 
-    gg.setFont(italic);
+    int ss=av.startSeq, es=av.endSeq, transY = 0;
+     if(vertical>0)    // scroll down
+     {
+       transY = imgHeight - vertical*av.charHeight;
+       ss = es - vertical;
+     }
+     else if(vertical<0)
+     {
+       es = ss-vertical;
+     }
 
+        gg.translate(0, transY);
+
+        drawIds(ss, es);
+
+        gg.translate( 0, -transY );
+
+
+    getGraphics().drawImage(image, 0, 0, this);
+  }
 
+  public void paintComponent(Graphics g)
+  {
+    imgHeight = getHeight();
+    imgHeight -= imgHeight % av.charHeight;
+    image = new BufferedImage(getWidth(), imgHeight, BufferedImage.TYPE_INT_RGB);
+    gg = (Graphics2D) image.getGraphics();
     //Fill in the background
     gg.setColor(Color.white);
-    gg.fillRect(0,0,getWidth(),getHeight());
+    gg.fillRect(0, 0, getWidth(), imgHeight);
+    gg.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
+                        RenderingHints.VALUE_ANTIALIAS_ON);
+    Font italic = new Font(av.getFont().getName(), Font.ITALIC,
+                           av.getFont().getSize());
+    gg.setFont(italic);
+
+
+    g.setColor(Color.white);
+    g.fillRect(0,0,getWidth(),getHeight());
+
+    drawIds( av.getStartSeq(), av.endSeq);
+
+    g.drawImage(image, 0, 0, this);
+  }
+
+  void drawIds(int starty, int endy)
+  {
 
     Color currentColor     = Color.white;
     Color currentTextColor = Color.black;
 
-    //Which ids are we printing
-    int starty = av.getStartSeq();
-    int endy   = av.endSeq;
-
     if (av.getWrapAlignment())
     {
           // Draw the rest of the panels
-          int chunkHeight =  (al.getHeight() + 2)*av.charHeight;
+          int chunkHeight =  (av.alignment.getHeight() + 2)*av.charHeight;
           int row = av.getStartRes() / av.chunkWidth ;
           for(int ypos=2*av.charHeight;
-              ypos <= getHeight() && row*av.chunkWidth<al.getWidth();
+              ypos <= getHeight() && row*av.chunkWidth<av.alignment.getWidth();
               ypos += chunkHeight, row++ )
           {
             for (int i = starty; i < av.alignment.getHeight(); i++)
             {
-              SequenceI s = al.getSequenceAt(i);
+              SequenceI s = av.alignment.getSequenceAt(i);
               drawIdString(gg, s, i, 0, ypos);
             }
           }
@@ -90,7 +133,8 @@ public class IdCanvas extends JPanel
       {
         // Selected sequence colours
 
-        if (av.getSelectionGroup()!= null && av.getSelectionGroup().sequences.contains(al.getSequenceAt(i)))
+        if (av.getSelectionGroup()!= null
+            && av.getSelectionGroup().sequences.contains(av.alignment.getSequenceAt(i)))
         {
        //   if(av.alignment.findGroup(al.getSequenceAt(i)).getEndRes()==
           currentColor = Color.lightGray;
@@ -98,24 +142,24 @@ public class IdCanvas extends JPanel
         }
         else
         {
-          currentColor = al.getSequenceAt(i).getColor();
+          currentColor = av.alignment.getSequenceAt(i).getColor();
           currentTextColor = Color.black;
         }
 
         gg.setColor(currentColor);
 
         gg.fillRect(0,
-                    AlignmentUtil.getPixelHeight(starty, i, charHeight),
+                    AlignmentUtil.getPixelHeight(starty, i, av.charHeight),
                     getWidth(),
-                    charHeight);
+                    av.charHeight);
 
         gg.setColor(currentTextColor);
-        String string = al.getSequenceAt(i).getName();
+        String string = av.alignment.getSequenceAt(i).getName();
         if(av.getShowFullId())
-          string = al.getSequenceAt(i).getDisplayId();
+          string = av.alignment.getSequenceAt(i).getDisplayId();
         gg.drawString(string, 0,
-                      AlignmentUtil.getPixelHeight(starty, i, charHeight) +
-                      charHeight - (charHeight / 5));
+                      AlignmentUtil.getPixelHeight(starty, i, av.charHeight) +
+                      av.charHeight - (av.charHeight / 5));
       }
 
       // add a border
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
-- 
1.7.10.2