functional scrolling

core/src/mindustry/core/UI.java

@@ -24,7 +24,7 @@ import mindustry.editor.*;
 import mindustry.game.EventType.*;
 import mindustry.gen.*;
 import mindustry.graphics.*;
-import mindustry.logic.LDialog;
+import mindustry.logic.LogicDialog;
 import mindustry.ui.*;
 import mindustry.ui.dialogs.*;
 import mindustry.ui.fragments.*;
@@ -68,7 +68,7 @@ public class UI implements ApplicationListener, Loadable{
     public SchematicsDialog schematics;
     public ModsDialog mods;
     public ColorPicker picker;
-    public LDialog logic;
+    public LogicDialog logic;
 
     public Cursor drillCursor, unloadCursor;
 
@@ -181,7 +181,7 @@ public class UI implements ApplicationListener, Loadable{
         research = new ResearchDialog();
         mods = new ModsDialog();
         schematics = new SchematicsDialog();
-        logic = new LDialog();
+        logic = new LogicDialog();
 
         Group group = Core.scene.root;
 

core/src/mindustry/logic/LCanvas.java

@@ -133,6 +133,10 @@ public class LCanvas extends Table{
         Seq<Element> seq = new Seq<>();
         int insertPosition = 0;
 
+        {
+            setTransform(true);
+        }
+
         @Override
         public void layout(){
             float cy = 0;
@@ -151,7 +155,7 @@ public class LCanvas extends Table{
                 if(dragging == e) continue;
 
                 e.setSize(width - margin * 2f, e.getPrefHeight());
-                e.setPosition(x + margin, height + y - margin - cy, Align.topLeft);
+                e.setPosition(x + margin, height- margin - cy, Align.topLeft);
 
                 cy += e.getPrefHeight() + space;
                 seq.add(e);
@@ -202,7 +206,7 @@ public class LCanvas extends Table{
             if(dragging != null && insertPosition <= seq.size){
                 float shiftAmount = dragging.getHeight();
                 float lastX = x + margin;
-                float lastY = insertPosition == 0 ? height + y - margin : seq.get(insertPosition - 1).y - space;
+                float lastY = insertPosition == 0 ? height + y - margin : seq.get(insertPosition - 1).y + y - space;
 
                 Tex.pane.draw(lastX, lastY - shiftAmount, width - margin*2f, dragging.getHeight());
             }

core/src/mindustry/logic/LogicDialog.java

@@ -5,11 +5,11 @@ import arc.scene.ui.layout.*;
 import arc.util.*;
 import mindustry.ui.dialogs.*;
 
-public class LDialog extends BaseDialog{
+public class LogicDialog extends BaseDialog{
     LCanvas canvas;
     Cons<String> consumer = s -> Log.info(s);
 
-    public LDialog(){
+    public LogicDialog(){
         super("logic");
 
         clearChildren();

core/src/mindustry/world/blocks/logic/LogicDisplay.java

@@ -45,6 +45,9 @@ public class LogicDisplay extends Block{
 
             if(buffer == null){
                 buffer = new FrameBuffer(displaySize, displaySize);
+                //clear the buffer - some OSs leave garbage in it
+                buffer.begin(Color.clear);
+                buffer.end();
             }
 
             if(!commands.isEmpty()){