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preserve sub-pixel antialiasing on non-focused completion popup

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Egor.Ushakov
2015-07-17 13:19:45 +03:00
parent b5b6d5ff41
commit 25f730a697
1 changed files with 12 additions and 1 deletions
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platform/lang-impl/src/com/intellij/codeInsight/lookup/impl/LookupCellRenderer.java
+12 -1
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@@ -38,12 +38,14 @@ import com.intellij.util.containers.ContainerUtil;
import com.intellij.util.containers.FList;
import com.intellij.util.ui.EmptyIcon;
import com.intellij.util.ui.GraphicsUtil;
import com.intellij.util.ui.UIUtil;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import javax.swing.*;
import javax.swing.border.EmptyBorder;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.util.HashMap;
import java.util.Map;
import java.util.Set;
@@ -485,8 +487,17 @@ public class LookupCellRenderer implements ListCellRenderer {
public void paint(Graphics g){
if (!myLookup.isFocused() && myLookup.isCompletion()) {
((Graphics2D)g).setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_OVER, 0.6f));
// sub-pixel antialiasing does not work with alpha composite, so we workaround this by painting to RGB image first
BufferedImage image = UIUtil.createImage(getWidth(), getHeight(), BufferedImage.TYPE_INT_RGB);
Graphics2D imageGraphics = image.createGraphics();
super.paint(imageGraphics);
imageGraphics.dispose();
UIUtil.drawImage(g, image, 0, 0, null);
}
else {
super.paint(g);
}
super.paint(g);
}
}
}