diff --git a/CHANGELOG.md b/CHANGELOG.md
index b5919cf8a..6612a26af 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -28,6 +28,8 @@ All notable changes to this project will be documented in this file.
 - [#1865] ConcurrentModificationException on SWF close
 - NullPointerException on expanding needed/dependent characters on basic tag info
 - Copy/Move with dependencies should copy mapped tags too
+- Recalculating dependencies in the loop (now only on change)
+- Dependencies handling
 
 ## [16.2.0] - 2022-11-08
 ### Added
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/CSMTextSettingsTag.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/CSMTextSettingsTag.java
index d33c9820c..ff153a726 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/CSMTextSettingsTag.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/CSMTextSettingsTag.java
@@ -26,6 +26,7 @@ import com.jpexs.decompiler.flash.types.annotations.SWFType;
 import com.jpexs.decompiler.flash.types.annotations.SWFVersion;
 import com.jpexs.helpers.ByteArrayRange;
 import java.io.IOException;
+import java.util.Set;
 
 /**
  *
@@ -124,4 +125,9 @@ public class CSMTextSettingsTag extends Tag implements CharacterIdTag {
     public String toString() {
         return super.toString() + " (" + textID + ")";
     }
+
+    @Override
+    public void getNeededCharacters(Set<Integer> needed) {
+        needed.add(textID);
+    }   
 }
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineButtonCxformTag.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineButtonCxformTag.java
index 759bb74f2..f95b47c30 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineButtonCxformTag.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineButtonCxformTag.java
@@ -26,6 +26,7 @@ import com.jpexs.decompiler.flash.types.annotations.SWFType;
 import com.jpexs.decompiler.flash.types.annotations.SWFVersion;
 import com.jpexs.helpers.ByteArrayRange;
 import java.io.IOException;
+import java.util.Set;
 
 /**
  *
@@ -97,4 +98,9 @@ public class DefineButtonCxformTag extends Tag implements CharacterIdTag {
     public String toString() {
         return super.toString() + " (" + buttonId + ")";
     }
+
+    @Override
+    public void getNeededCharacters(Set<Integer> needed) {
+        needed.add(buttonId);
+    }       
 }
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineButtonSoundTag.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineButtonSoundTag.java
index 16c92b8e6..00f87984f 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineButtonSoundTag.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineButtonSoundTag.java
@@ -155,6 +155,7 @@ public class DefineButtonSoundTag extends Tag implements CharacterIdTag {
         if (buttonSoundChar3 != 0) {
             needed.add(buttonSoundChar3);
         }
+        needed.add(buttonId);
     }
     
     @Override
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineFontAlignZonesTag.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineFontAlignZonesTag.java
index 3472eca1e..32738b3af 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineFontAlignZonesTag.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineFontAlignZonesTag.java
@@ -31,6 +31,7 @@ import com.jpexs.helpers.ByteArrayRange;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Set;
 
 /**
  *
@@ -116,4 +117,9 @@ public class DefineFontAlignZonesTag extends Tag implements CharacterIdTag {
     public String toString() {
         return super.toString() + " (" + fontID + ")";
     }
+    
+    @Override
+    public void getNeededCharacters(Set<Integer> needed) {
+        needed.add(fontID);
+    }
 }
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineFontInfo2Tag.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineFontInfo2Tag.java
index d218c068d..f984e867e 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineFontInfo2Tag.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineFontInfo2Tag.java
@@ -30,6 +30,7 @@ import com.jpexs.helpers.utf8.Utf8Helper;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Set;
 
 /**
  *
@@ -189,4 +190,9 @@ public class DefineFontInfo2Tag extends FontInfoTag {
     public boolean isShiftJIS() {
         return fontFlagsShiftJIS;
     }                
+    
+    @Override
+    public void getNeededCharacters(Set<Integer> needed) {
+        needed.add(fontID);
+    }
 }
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineFontInfoTag.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineFontInfoTag.java
index 1cd6c155c..2790dea42 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineFontInfoTag.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineFontInfoTag.java
@@ -29,6 +29,7 @@ import com.jpexs.helpers.utf8.Utf8Helper;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Set;
 
 /**
  *
@@ -191,4 +192,9 @@ public class DefineFontInfoTag extends FontInfoTag {
     public boolean isAnsi() {
         return fontFlagsANSI;
     }
+    
+    @Override
+    public void getNeededCharacters(Set<Integer> needed) {
+        needed.add(fontID);
+    }
 }
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineFontNameTag.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineFontNameTag.java
index a844d9f4b..a09be6671 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineFontNameTag.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineFontNameTag.java
@@ -25,6 +25,7 @@ import com.jpexs.decompiler.flash.types.annotations.SWFType;
 import com.jpexs.decompiler.flash.types.annotations.SWFVersion;
 import com.jpexs.helpers.ByteArrayRange;
 import java.io.IOException;
+import java.util.Set;
 
 /**
  *
@@ -94,4 +95,9 @@ public class DefineFontNameTag extends Tag implements CharacterIdTag {
     public String toString() {
         return super.toString() + " (" + fontId + ")";
     }
+    
+    @Override
+    public void getNeededCharacters(Set<Integer> needed) {
+        needed.add(fontId);
+    }
 }
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineScalingGridTag.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineScalingGridTag.java
index 1b0ba247e..5176573c3 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineScalingGridTag.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineScalingGridTag.java
@@ -37,6 +37,7 @@ import java.awt.geom.AffineTransform;
 import java.awt.geom.GeneralPath;
 import java.awt.geom.PathIterator;
 import java.io.IOException;
+import java.util.Set;
 
 /**
  *
@@ -214,5 +215,10 @@ public class DefineScalingGridTag extends Tag implements CharacterIdTag {
     public String toString() {
         return super.toString() + " (" + characterId + ")";
     }
+    
+    @Override
+    public void getNeededCharacters(Set<Integer> needed) {
+        needed.add(characterId);
+    }
 
 }
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineSpriteTag.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineSpriteTag.java
index f26ce377c..de51e0d9c 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineSpriteTag.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DefineSpriteTag.java
@@ -456,10 +456,12 @@ public class DefineSpriteTag extends DrawableTag implements Timelined {
     }
     
     @Override
-    public Set<Integer> getMissingNeededCharacters() {
+    public Set<Integer> getMissingNeededCharacters(Set<Integer> needed) {
         Set<Integer> ret = new LinkedHashSet<>();
         for (Tag tag : getTags()) {
-            Set<Integer> sub = tag.getMissingNeededCharacters();
+            Set<Integer> subNeeded = new HashSet<>();
+            tag.getNeededCharactersDeep(subNeeded);
+            Set<Integer> sub = tag.getMissingNeededCharacters(subNeeded);
             ret.addAll(sub);
         }
         return ret;
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DoInitActionTag.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DoInitActionTag.java
index 0e0a43a9c..e4e83233b 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DoInitActionTag.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/DoInitActionTag.java
@@ -38,6 +38,7 @@ import com.jpexs.helpers.Helper;
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Set;
 
 /**
  *
@@ -264,4 +265,9 @@ public class DoInitActionTag extends Tag implements CharacterIdTag, ASMSource {
     public Tag getTag() {
         return null; //?
     }
+    
+    @Override
+    public void getNeededCharacters(Set<Integer> needed) {
+        needed.add(spriteId);
+    }
 }
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/FreeCharacterTag.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/FreeCharacterTag.java
index fb0266462..2929bfb60 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/FreeCharacterTag.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/FreeCharacterTag.java
@@ -25,6 +25,7 @@ import com.jpexs.decompiler.flash.types.annotations.SWFType;
 import com.jpexs.decompiler.flash.types.annotations.SWFVersion;
 import com.jpexs.helpers.ByteArrayRange;
 import java.io.IOException;
+import java.util.Set;
 
 /**
  *
@@ -82,4 +83,9 @@ public class FreeCharacterTag extends Tag implements CharacterIdTag {
     public void setCharacterId(int characterId) {
         this.characterId = characterId;
     }
+    
+    @Override
+    public void getNeededCharacters(Set<Integer> needed) {
+        needed.add(characterId);
+    }
 }
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/NameCharacterTag.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/NameCharacterTag.java
index 95497afdd..b151df70a 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/NameCharacterTag.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/NameCharacterTag.java
@@ -25,6 +25,7 @@ import com.jpexs.decompiler.flash.types.annotations.SWFType;
 import com.jpexs.decompiler.flash.types.annotations.SWFVersion;
 import com.jpexs.helpers.ByteArrayRange;
 import java.io.IOException;
+import java.util.Set;
 
 /**
  *
@@ -91,4 +92,9 @@ public class NameCharacterTag extends Tag implements CharacterIdTag {
     public void setCharacterId(int characterId) {
         this.characterId = characterId;
     }
+    
+    @Override
+    public void getNeededCharacters(Set<Integer> needed) {
+        needed.add(characterId);
+    }
 }
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/RemoveObjectTag.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/RemoveObjectTag.java
index 136567aed..3b4d03380 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/RemoveObjectTag.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/RemoveObjectTag.java
@@ -26,6 +26,7 @@ import com.jpexs.decompiler.flash.types.annotations.SWFType;
 import com.jpexs.decompiler.flash.types.annotations.SWFVersion;
 import com.jpexs.helpers.ByteArrayRange;
 import java.io.IOException;
+import java.util.Set;
 
 /**
  * Removes the specified character
@@ -105,4 +106,9 @@ public class RemoveObjectTag extends RemoveTag implements CharacterIdTag {
     public void setCharacterId(int characterId) {
         this.characterId = characterId;
     }
+    
+    @Override
+    public void getNeededCharacters(Set<Integer> needed) {
+        needed.add(characterId);
+    }
 }
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/SoundStreamHead2Tag.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/SoundStreamHead2Tag.java
index f24bb0b01..5b5298160 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/SoundStreamHead2Tag.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/SoundStreamHead2Tag.java
@@ -34,6 +34,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Set;
 
 /**
  *
@@ -263,4 +264,6 @@ public class SoundStreamHead2Tag extends Tag implements SoundStreamHeadTypeTag {
     public String toString() {
         return getName() + (virtualCharacterId > 0 ? " (" + virtualCharacterId + ")" : "");
     }
+    
+    //getNeededCharacters intentionally not defined
 }
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/SoundStreamHeadTag.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/SoundStreamHeadTag.java
index 6230341a8..0cb593e04 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/SoundStreamHeadTag.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/SoundStreamHeadTag.java
@@ -35,6 +35,7 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.Set;
 
 /**
  *
@@ -273,4 +274,13 @@ public class SoundStreamHeadTag extends Tag implements SoundStreamHeadTypeTag {
     public String toString() {
         return getName() + (virtualCharacterId > 0 ? " (" + virtualCharacterId + ")" : "");
     }
+    
+    @Override
+    public void getNeededCharacters(Set<Integer> needed) {
+        if (virtualCharacterId > 0) {
+            needed.add(virtualCharacterId);
+        }
+    }
+    
+    //getNeededCharacters intentionally not defined
 }
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/Tag.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/Tag.java
index 0e388f069..1c314cfb3 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/Tag.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/Tag.java
@@ -21,6 +21,7 @@ import com.jpexs.decompiler.flash.SWF;
 import com.jpexs.decompiler.flash.SWFInputStream;
 import com.jpexs.decompiler.flash.SWFOutputStream;
 import com.jpexs.decompiler.flash.abc.CopyOutputStream;
+import com.jpexs.decompiler.flash.amf.amf3.ListSet;
 import com.jpexs.decompiler.flash.configuration.Configuration;
 import com.jpexs.decompiler.flash.tags.base.BoundedTag;
 import com.jpexs.decompiler.flash.tags.base.CharacterIdTag;
@@ -599,15 +600,14 @@ public abstract class Tag implements NeedsCharacters, Exportable, Serializable {
     public void getNeededCharacters(Set<Integer> needed) {
     }
     
-    public Set<Integer> getMissingNeededCharacters() {
-        Set<Integer> needed = new LinkedHashSet<>();
-        getNeededCharacters(needed);
-        if (needed.isEmpty()) {
-            return needed;
+    public Set<Integer> getMissingNeededCharacters(Set<Integer> needed) {
+        Set<Integer> needed2 = new ListSet<>(needed);
+        if (needed2.isEmpty()) {
+            return new LinkedHashSet<>();
         }
         Timelined tim = getTimelined();
         if (tim == null) {
-            return needed;
+            return needed2;
         }
         ReadOnlyTagList tags = tim.getTags();
         for (int i = tags.indexOf(this) - 1; i >= -1; i--) {
@@ -624,13 +624,13 @@ public abstract class Tag implements NeedsCharacters, Exportable, Serializable {
             }
             if (tags.get(i) instanceof CharacterTag) {
                 int charId = ((CharacterTag) tags.get(i)).getCharacterId();
-                needed.remove(charId);
-                if (needed.isEmpty()) {
-                    return needed;
+                needed2.remove(charId);
+                if (needed2.isEmpty()) {
+                    return needed2;
                 }
             }
         }        
-        return needed;
+        return needed2;
     }
 
     @Override
@@ -725,7 +725,7 @@ public abstract class Tag implements NeedsCharacters, Exportable, Serializable {
                             bounds.getHeight() / SWF.unitDivisor));
         }
 
-        Set<Integer> needed = new LinkedHashSet<>();
+        /*Set<Integer> needed = new LinkedHashSet<>();
         getNeededCharactersDeep(needed);
 
         if (needed.size() > 0) {
@@ -745,7 +745,7 @@ public abstract class Tag implements NeedsCharacters, Exportable, Serializable {
             if(dependent2 != null && dependent2.size() > 0) {
                 tagInfo.addInfo("general", "dependentFrames", Helper.joinStrings(dependent2, ", "));
             }
-        }
+        }*/
     }
     
     public String getCharset() {
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/VideoFrameTag.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/VideoFrameTag.java
index 4618f0c8f..44acf564c 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/VideoFrameTag.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/VideoFrameTag.java
@@ -25,6 +25,7 @@ import com.jpexs.decompiler.flash.types.annotations.SWFType;
 import com.jpexs.decompiler.flash.types.annotations.SWFVersion;
 import com.jpexs.helpers.ByteArrayRange;
 import java.io.IOException;
+import java.util.Set;
 
 /**
  *
@@ -96,4 +97,9 @@ public class VideoFrameTag extends Tag implements CharacterIdTag {
     public void setCharacterId(int characterId) {
         this.streamID = characterId;
     }
+    
+    @Override
+    public void getNeededCharacters(Set<Integer> needed) {
+        needed.add(streamID);
+    }
 }
diff --git a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/base/ButtonTag.java b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/base/ButtonTag.java
index d21ad34f0..1c3707cb7 100644
--- a/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/base/ButtonTag.java
+++ b/libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/tags/base/ButtonTag.java
@@ -70,11 +70,6 @@ public abstract class ButtonTag extends DrawableTag implements Timelined {
         for (BUTTONRECORD r : getRecords()) {
             needed.add(r.characterId);
         }
-
-        DefineButtonSoundTag sounds = getSounds();
-        if (sounds != null) {
-            sounds.getNeededCharacters(needed);
-        }
     }
 
     @Override
diff --git a/src/com/jpexs/decompiler/flash/gui/Main.java b/src/com/jpexs/decompiler/flash/gui/Main.java
index 7480c5695..3fdedbb69 100644
--- a/src/com/jpexs/decompiler/flash/gui/Main.java
+++ b/src/com/jpexs/decompiler/flash/gui/Main.java
@@ -1369,6 +1369,7 @@ public class Main {
                         mainFrame.getPanel().tagTree.setExpandPathString(resourcesPathStr);
                         mainFrame.getPanel().tagListTree.setExpandPathString(tagListPathStr);
                     }
+                    mainFrame.getPanel().updateMissingNeededCharacters();
                 }
 
                 if (executeAfterOpen != null) {
diff --git a/src/com/jpexs/decompiler/flash/gui/MainPanel.java b/src/com/jpexs/decompiler/flash/gui/MainPanel.java
index 57bd09b88..d4e3d6ca3 100644
--- a/src/com/jpexs/decompiler/flash/gui/MainPanel.java
+++ b/src/com/jpexs/decompiler/flash/gui/MainPanel.java
@@ -31,9 +31,9 @@ import com.jpexs.decompiler.flash.abc.avm2.AVM2ConstantPool;
 import com.jpexs.decompiler.flash.abc.avm2.deobfuscation.AbcMultiNameCollisionFixer;
 import com.jpexs.decompiler.flash.abc.avm2.deobfuscation.DeobfuscationLevel;
 import com.jpexs.decompiler.flash.abc.types.traits.Trait;
+import com.jpexs.decompiler.flash.amf.amf3.ListSet;
 import com.jpexs.decompiler.flash.configuration.Configuration;
 import com.jpexs.decompiler.flash.configuration.ConfigurationItem;
-import com.jpexs.decompiler.flash.configuration.SwfSpecificConfiguration;
 import com.jpexs.decompiler.flash.configuration.SwfSpecificCustomConfiguration;
 import com.jpexs.decompiler.flash.dumpview.DumpInfo;
 import com.jpexs.decompiler.flash.dumpview.DumpInfoSwfNode;
@@ -124,6 +124,7 @@ import com.jpexs.decompiler.flash.tags.DefineBinaryDataTag;
 import com.jpexs.decompiler.flash.tags.DefineBitsJPEG3Tag;
 import com.jpexs.decompiler.flash.tags.DefineBitsJPEG4Tag;
 import com.jpexs.decompiler.flash.tags.DefineBitsTag;
+import com.jpexs.decompiler.flash.tags.DefineFontNameTag;
 import com.jpexs.decompiler.flash.tags.DefineShape2Tag;
 import com.jpexs.decompiler.flash.tags.DefineSoundTag;
 import com.jpexs.decompiler.flash.tags.DefineSpriteTag;
@@ -197,7 +198,6 @@ import java.awt.Desktop;
 import java.awt.Dimension;
 import java.awt.FlowLayout;
 import java.awt.Font;
-import java.awt.Graphics;
 import java.awt.datatransfer.DataFlavor;
 import java.awt.datatransfer.Transferable;
 import java.awt.datatransfer.UnsupportedFlavorException;
@@ -228,7 +228,6 @@ import java.lang.ref.WeakReference;
 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.Collection;
-import java.util.Collections;
 import java.util.ConcurrentModificationException;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -238,6 +237,7 @@ import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.Map.Entry;
+import java.util.Objects;
 import java.util.Random;
 import java.util.Set;
 import java.util.WeakHashMap;
@@ -253,12 +253,9 @@ import javax.swing.Icon;
 import javax.swing.JColorChooser;
 import javax.swing.JFileChooser;
 import javax.swing.JLabel;
-import javax.swing.JLayeredPane;
 import javax.swing.JOptionPane;
 import javax.swing.JPanel;
 import javax.swing.JProgressBar;
-import javax.swing.JScrollBar;
-import javax.swing.JScrollPane;
 import javax.swing.JSplitPane;
 import javax.swing.JTabbedPane;
 import javax.swing.JTextField;
@@ -270,11 +267,9 @@ import javax.swing.event.DocumentListener;
 import javax.swing.event.TreeSelectionEvent;
 import javax.swing.event.TreeSelectionListener;
 import javax.swing.filechooser.FileFilter;
-import javax.swing.plaf.basic.BasicScrollPaneUI;
 import javax.swing.plaf.basic.BasicTreeUI;
 import javax.swing.tree.DefaultTreeSelectionModel;
 import javax.swing.tree.TreePath;
-import javax.swing.tree.TreeSelectionModel;
 import jsyntaxpane.DefaultSyntaxKit;
 
 /**
@@ -394,9 +389,10 @@ public final class MainPanel extends JPanel implements TreeSelectionListener, Se
 
     private static final Logger logger = Logger.getLogger(MainPanel.class.getName());
 
+    private Map<TreeItem, Set<Integer>> neededCharacters = new WeakHashMap<>();
     private Map<TreeItem, Set<Integer>> missingNeededCharacters = new WeakHashMap<>();
 
-    private Thread calculateMissingNeededThread;
+    private CalculateMissingNeededThread calculateMissingNeededThread;
 
     private List<WeakReference<TreeItem>> orderedClipboard = new ArrayList<>();
     private Map<TreeItem, Boolean> clipboard = new WeakHashMap<>();
@@ -1146,23 +1142,7 @@ public final class MainPanel extends JPanel implements TreeSelectionListener, Se
 
         //Opening files with drag&drop to main window
         enableDrop(true);
-        calculateMissingNeededThread = new Thread("calculateMissingNeededThread") {
-            @Override
-            public void run() {
-                while (true) {
-                    try {
-                        calculateMissingNeededCharacters();
-                    } catch (ConcurrentModificationException cme) {
-                        //ignore
-                    }
-                    try {
-                        Thread.sleep(1000);
-                    } catch (InterruptedException ex) {
-                        return;
-                    }
-                }
-            }
-        };
+        calculateMissingNeededThread = new CalculateMissingNeededThread();
         calculateMissingNeededThread.start();
     }
 
@@ -2960,6 +2940,7 @@ public final class MainPanel extends JPanel implements TreeSelectionListener, Se
 
             swf.clearImageCache();
             reload(true);
+            updateMissingNeededCharacters();
         }
     }
 
@@ -3045,6 +3026,7 @@ public final class MainPanel extends JPanel implements TreeSelectionListener, Se
                         ViewMessages.showMessageDialog(MainPanel.this, translate("import.script.result").replace("%count%", Integer.toString(countAs2 + countAs3)));
                         if (countAs2 != 0 || countAs3 != 0) {
                             reload(true);
+                            updateMissingNeededCharacters();
                         }
                     });
                 }
@@ -3457,6 +3439,7 @@ public final class MainPanel extends JPanel implements TreeSelectionListener, Se
         }
 
         reload(true);
+        updateMissingNeededCharacters();
     }
 
     public void refreshDecompiled() {
@@ -4344,7 +4327,7 @@ public final class MainPanel extends JPanel implements TreeSelectionListener, Se
             character.getNeededCharactersDeep(needed);
             needed.remove(buttonRecord.characterId);
             needed.add(buttonRecord.characterId);
-            
+
             for (int n : needed) {
                 CharacterTag neededCharacter;
                 try {
@@ -4354,10 +4337,10 @@ public final class MainPanel extends JPanel implements TreeSelectionListener, Se
                     return;
                 }
                 neededCharacter.setSwf(swf);
-                neededCharacter.setTimelined(swf);    
+                neededCharacter.setTimelined(swf);
                 swf.addTag(neededCharacter);
             }
-            
+
             PlaceObject2Tag placeTag = new PlaceObject2Tag(swf, false, 1, buttonRecord.characterId, buttonRecord.placeMatrix, buttonRecord.colorTransform, 0, null, -1, null);
             swf.addTag(placeTag);
             placeTag.setTimelined(swf);
@@ -4460,6 +4443,36 @@ public final class MainPanel extends JPanel implements TreeSelectionListener, Se
             Tag tag = (Tag) treeItem;
             TagInfo tagInfo = new TagInfo(treeItem.getSwf());
             tag.getTagInfo(tagInfo);
+            
+            Set<Integer> needed;
+            if (neededCharacters.containsKey(treeItem)) {
+                needed = neededCharacters.get(treeItem);
+            } else {
+                needed = new LinkedHashSet<>();
+                tag.getNeededCharactersDeep(needed);
+                neededCharacters.put(treeItem, needed);
+            }
+
+            if (needed.size() > 0) {
+                tagInfo.addInfo("general", "neededCharacters", Helper.joinStrings(needed, ", "));
+            }
+
+            if (tag instanceof CharacterTag) {
+                int characterId = ((CharacterTag) tag).getCharacterId();
+                Set<Integer> dependent = tag.getSwf().getDependentCharacters(characterId);
+                if (dependent != null) {
+                    if (dependent.size() > 0) {
+                        tagInfo.addInfo("general", "dependentCharacters", Helper.joinStrings(dependent, ", "));
+                    }
+                }
+
+                Set<Integer> dependent2 = tag.getSwf().getDependentFrames(characterId);
+                if(dependent2 != null && dependent2.size() > 0) {
+                    tagInfo.addInfo("general", "dependentFrames", Helper.joinStrings(dependent2, ", "));
+                }
+            }
+            
+            
             if (!tagInfo.isEmpty()) {
                 tagInfoPanel.setTagInfos(tagInfo);
                 showDetail(DETAILCARDTAGINFO);
@@ -4941,29 +4954,78 @@ public final class MainPanel extends JPanel implements TreeSelectionListener, Se
         Helper.emptyObject(this);
     }
 
-    private static void calculateMissingNeededCharacters(Map<TreeItem, Set<Integer>> missingNeededCharacters, Timelined tim) {
+    private static void calculateMissingNeededCharacters(Map<TreeItem, Set<Integer>> neededMap, Map<TreeItem, Set<Integer>> missingNeededCharacters, Timelined tim) {
         List<Tag> tags = tim.getTags().toArrayList();
         for (Tag t : tags) {
-            missingNeededCharacters.put(t, t.getMissingNeededCharacters());
+            Set<Integer> needed = new LinkedHashSet<>();
+            t.getNeededCharactersDeep(needed);
+            neededMap.put(t, needed);
+            missingNeededCharacters.put(t, t.getMissingNeededCharacters(needed));
             if (t instanceof DefineSpriteTag) {
-                calculateMissingNeededCharacters(missingNeededCharacters, (DefineSpriteTag) t);
+                calculateMissingNeededCharacters(neededMap, missingNeededCharacters, (DefineSpriteTag) t);
             }
         }
     }
 
-    public void calculateMissingNeededCharacters() {
+    public void updateMissingNeededCharacters() {
+        if (calculateMissingNeededThread != null) {
+            calculateMissingNeededThread.recalculate();
+        }
+    }
+
+    private void calculateMissingNeededCharacters() {
         Map<TreeItem, Set<Integer>> missingNeededCharacters = new WeakHashMap<>();
+        Map<TreeItem, Set<Integer>> neededCharacters = new WeakHashMap<>();
+        
         List<SWFList> swfsLists = new ArrayList<>(swfs);
         for (SWFList swfList : swfsLists) {
             for (SWF swf : swfList) {
-                calculateMissingNeededCharacters(missingNeededCharacters, swf);
+                calculateMissingNeededCharacters(neededCharacters, missingNeededCharacters, swf);
             }
         }
-        if (!missingNeededCharacters.equals(this.missingNeededCharacters)) {
-            this.missingNeededCharacters = missingNeededCharacters;
-            tagTree.setMissingNeededCharacters(missingNeededCharacters);
-            tagListTree.setMissingNeededCharacters(missingNeededCharacters);
-        }
+        this.neededCharacters = neededCharacters;
+        this.missingNeededCharacters = missingNeededCharacters; 
+        tagTree.setMissingNeededCharacters(missingNeededCharacters);
+        tagListTree.setMissingNeededCharacters(missingNeededCharacters);
     }
 
+    class CalculateMissingNeededThread extends Thread {
+
+        public CalculateMissingNeededThread() {
+            super("calculateMissingNeededThread");
+        }
+
+        private boolean recalculate = false;
+
+        public synchronized void recalculate() {
+            this.recalculate = true;
+            this.notify();
+        }
+
+        @Override
+        public void run() {
+            while (true) {
+                synchronized (this) {
+                    recalculate = false;
+                }
+                try {
+                    calculateMissingNeededCharacters();
+                } catch (ConcurrentModificationException cme) {
+                    //ignore
+                }
+                synchronized (this) {
+
+                    if (recalculate) {
+                        continue;
+                    }
+
+                    try {
+                        wait();
+                    } catch (InterruptedException ex) {
+                        return;
+                    }
+                }
+            }
+        }
+    }
 }