reverted transparent progress in completion for Peter, see IDEA-142801

platform/lang-impl/src/com/intellij/codeInsight/lookup/impl/LookupUi.java

@@ -47,6 +47,7 @@ import com.intellij.ui.components.JBScrollPane;
 import com.intellij.util.Alarm;
 import com.intellij.util.PlatformIcons;
 import com.intellij.util.ui.AbstractLayoutManager;
+import com.intellij.util.ui.AsyncProcessIcon;
 import com.intellij.util.ui.ButtonlessScrollBarUI;
 import com.intellij.util.ui.JBUI;
 import com.intellij.util.ui.UIUtil;
@@ -77,6 +78,8 @@ class LookupUi {
   private final JLabel mySortingLabel = new JLabel();
   private final JScrollPane myScrollPane;
   private final JButton myScrollBarIncreaseButton;
+  private final AsyncProcessIcon myProcessIcon = new AsyncProcessIcon("Completion progress");
+  private final JPanel myIconPanel = new JPanel(new BorderLayout());
   private final LookupLayeredPane myLayeredPane = new LookupLayeredPane();
 
   private LookupHint myElementHint = null;
@@ -89,6 +92,10 @@ class LookupUi {
     myList = list;
     myProject = project;
 
+    myIconPanel.setVisible(false);
+    myIconPanel.setBackground(Color.LIGHT_GRAY);
+    myIconPanel.add(myProcessIcon);
+
     JComponent adComponent = advertiser.getAdComponent();
     adComponent.setBorder(new EmptyBorder(0, 1, 1, 2 + AllIcons.Ide.LookupRelevance.getIconWidth()));
     myLayeredPane.mainPanel.add(adComponent, BorderLayout.SOUTH);
@@ -125,6 +132,7 @@ class LookupUi {
 
     updateScrollbarVisibility();
 
+    Disposer.register(lookup, myProcessIcon);
     Disposer.register(lookup, myHintAlarm);
   }
 
@@ -220,7 +228,7 @@ class LookupUi {
     Runnable setVisible = new Runnable() {
       @Override
       public void run() {
-        myList.setPaintBusy(myLookup.isCalculating());
+        myIconPanel.setVisible(myLookup.isCalculating());
       }
     };
     if (myLookup.isCalculating()) {
@@ -228,6 +236,12 @@ class LookupUi {
     } else {
       setVisible.run();
     }
+
+    if (calculating) {
+      myProcessIcon.resume();
+    } else {
+      myProcessIcon.suspend();
+    }
   }
 
   private void updateSorting() {
@@ -325,6 +339,7 @@ class LookupUi {
 
     private LookupLayeredPane() {
       add(mainPanel, 0, 0);
+      add(myIconPanel, 42, 0);
       add(mySortingLabel, 10, 0);
 
       setLayout(new AbstractLayoutManager() {
@@ -379,6 +394,10 @@ class LookupUi {
       vScrollBar.revalidate();
       vScrollBar.repaint();
       
+      final Dimension iconSize = myProcessIcon.getPreferredSize();
+      myIconPanel.setBounds(getWidth() - iconSize.width - (vScrollBar.isVisible() ? vScrollBar.getWidth() : 0), 0, iconSize.width,
+                            iconSize.height);
+
       final Dimension sortSize = mySortingLabel.getPreferredSize();
       final int sortWidth = vScrollBar.isVisible() ? vScrollBar.getWidth() : sortSize.width;
       final int sortHeight = Math.max(sortSize.height, adHeight);