overlay renderer: use copyonwritelist for overlays
The map can be rebuilt during rendering
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@@ -34,7 +34,6 @@ import java.awt.Rectangle;
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import java.awt.event.KeyEvent;
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import java.awt.event.KeyEvent;
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import java.awt.event.MouseEvent;
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import java.awt.event.MouseEvent;
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import java.awt.image.BufferedImage;
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import java.awt.image.BufferedImage;
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import java.util.ArrayList;
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import java.util.Collections;
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import java.util.Collections;
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import java.util.HashMap;
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import java.util.HashMap;
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import java.util.List;
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import java.util.List;
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@@ -225,7 +224,7 @@ public class OverlayRenderer extends MouseListener implements KeyListener
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{
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{
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if (value == null)
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if (value == null)
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{
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{
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value = new ArrayList<>();
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value = new CopyOnWriteArrayList<>();
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}
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}
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value.add(overlay);
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value.add(overlay);
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