From 303411a0b3ce7a7322fc6c12aceac4b452afb917 Mon Sep 17 00:00:00 2001
From: hneemann <helmut.neemann@arcor.de>
Date: Wed, 1 Mar 2017 21:13:44 +0100
Subject: [PATCH] small improvement on redraw heap load

---
 src/main/dig/cmos/tristateOut.dig             | 36 ++++++++-----------
 .../gui/components/CircuitComponent.java      | 16 +++++----
 2 files changed, 25 insertions(+), 27 deletions(-)

diff --git a/src/main/dig/cmos/tristateOut.dig b/src/main/dig/cmos/tristateOut.dig
index 7c8103f2d..98fe6f500 100644
--- a/src/main/dig/cmos/tristateOut.dig
+++ b/src/main/dig/cmos/tristateOut.dig
@@ -45,12 +45,12 @@
     <visualElement>
       <elementName>VDD</elementName>
       <elementAttributes/>
-      <pos x="520" y="260"/>
+      <pos x="520" y="280"/>
     </visualElement>
     <visualElement>
       <elementName>Ground</elementName>
       <elementAttributes/>
-      <pos x="520" y="580"/>
+      <pos x="520" y="560"/>
     </visualElement>
     <visualElement>
       <elementName>NFET</elementName>
@@ -156,12 +156,18 @@
       </elementAttributes>
       <pos x="580" y="520"/>
     </visualElement>
+    <visualElement>
+      <elementName>VDD</elementName>
+      <elementAttributes/>
+      <pos x="380" y="280"/>
+    </visualElement>
+    <visualElement>
+      <elementName>Ground</elementName>
+      <elementAttributes/>
+      <pos x="380" y="440"/>
+    </visualElement>
   </visualElements>
   <wires>
-    <wire>
-      <p1 x="380" y="560"/>
-      <p2 x="520" y="560"/>
-    </wire>
     <wire>
       <p1 x="300" y="480"/>
       <p2 x="480" y="480"/>
@@ -182,10 +188,6 @@
       <p1 x="340" y="420"/>
       <p2 x="360" y="420"/>
     </wire>
-    <wire>
-      <p1 x="380" y="280"/>
-      <p2 x="520" y="280"/>
-    </wire>
     <wire>
       <p1 x="480" y="360"/>
       <p2 x="500" y="360"/>
@@ -219,8 +221,8 @@
       <p2 x="340" y="540"/>
     </wire>
     <wire>
-      <p1 x="520" y="260"/>
-      <p2 x="520" y="280"/>
+      <p1 x="520" y="280"/>
+      <p2 x="520" y="300"/>
     </wire>
     <wire>
       <p1 x="520" y="340"/>
@@ -238,14 +240,6 @@
       <p1 x="520" y="540"/>
       <p2 x="520" y="560"/>
     </wire>
-    <wire>
-      <p1 x="520" y="560"/>
-      <p2 x="520" y="580"/>
-    </wire>
-    <wire>
-      <p1 x="520" y="280"/>
-      <p2 x="520" y="300"/>
-    </wire>
     <wire>
       <p1 x="520" y="420"/>
       <p2 x="520" y="440"/>
@@ -264,7 +258,7 @@
     </wire>
     <wire>
       <p1 x="380" y="420"/>
-      <p2 x="380" y="560"/>
+      <p2 x="380" y="440"/>
     </wire>
     <wire>
       <p1 x="380" y="360"/>
diff --git a/src/main/java/de/neemann/digital/gui/components/CircuitComponent.java b/src/main/java/de/neemann/digital/gui/components/CircuitComponent.java
index bafb005e3..614876cb3 100644
--- a/src/main/java/de/neemann/digital/gui/components/CircuitComponent.java
+++ b/src/main/java/de/neemann/digital/gui/components/CircuitComponent.java
@@ -377,7 +377,7 @@ public class CircuitComponent extends JComponent implements Circuit.ChangedListe
     }
 
     /**
-     * Adds alle the wires representing the given value to the highlighted list
+     * Adds all the wires representing the given value to the highlighted list
      *
      * @param values the value
      */
@@ -399,7 +399,7 @@ public class CircuitComponent extends JComponent implements Circuit.ChangedListe
     }
 
     /**
-     * Addes the given element to insert to the circuit
+     * Adds the given element to insert to the circuit
      *
      * @param element the element to insert
      */
@@ -415,14 +415,18 @@ public class CircuitComponent extends JComponent implements Circuit.ChangedListe
     protected void paintComponent(Graphics g) {
         super.paintComponent(g);
 
-        if (hasChanged
-                || buffer == null
+        boolean needsNewBuffer = buffer == null
                 || getWidth() != buffer.getWidth()
-                || getHeight() != buffer.getHeight()
+                || getHeight() != buffer.getHeight();
+
+        if (hasChanged
+                || needsNewBuffer
                 || highLighted.size() != highlightedPaintedSize) {
 
 //            long time = System.currentTimeMillis();
-            buffer = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration().createCompatibleImage(getWidth(), getHeight());
+            if (needsNewBuffer)
+                buffer = GraphicsEnvironment.getLocalGraphicsEnvironment().getDefaultScreenDevice().getDefaultConfiguration().createCompatibleImage(getWidth(), getHeight());
+
             Graphics2D gr2 = buffer.createGraphics();
             gr2.setColor(Color.WHITE);
             gr2.fillRect(0, 0, getWidth(), getHeight());