Fix SceneView UI layout issues with 2021.2+ (#330)

* Fix SceneView UI layout issues with 2021.2+
* implement fixes suggested by @andreiagmu, clean up UI

this implements fixes suggested by @andreiagmu and removes the sliders in the generator popups, in favor of `[<] [>]` buttons, which removes the bugginess of unity sliders in the scene view.

* removed redundant/unused imports or braces, fixed compilation errors on versions < 2021.2

* Revert "Merge branch 'master' into 2021.2-update"

This reverts commit 762822b, reversing
changes made to 142008a.

* Merge pull request #328 from epiplon-game-studio/master

Fixes a reference error bug with play mode

* revert changes from upstream, which adjusts the Y offset of the toolbar.

This is now handled automatically by unity, with `rootVisualElement.contentRect`, causing the upstream changes to do nothing.

* Update EditModeToolWindow.Editor.cs

* Update EditModeToolWindow.Editor.cs

* Delete ProjectVersion.txt

.gitignore

@@ -4,6 +4,7 @@
 [Bb]uild/
 [Bb]uilds/
 Assets/AssetStoreTools*
+UserSettings*
 
 # Visual Studio cache directory
 .vs/

RealtimeCSG/Assets/Plugins/RealtimeCSG/Editor/Scripts/Control/Managers/InternalCSGModelManager.DefaultModel.cs

@@ -88,14 +88,12 @@ static void InitializeDefaultCSGModel(Scene currentScene, CSGSceneState sceneSta
 			bool inPrefabMode = false;
 			Transform prefabRootTransform = null;
 #if UNITY_2018_3_OR_NEWER
-
-#if UNITY_2021_2_OR_NEWER
-			var currentPrefabStage = UnityEditor.SceneManagement.PrefabStageUtility.GetCurrentPrefabStage();
-#else
+    #if !UNITY_2021_2_OR_NEWER
 			var currentPrefabStage = UnityEditor.Experimental.SceneManagement.PrefabStageUtility.GetCurrentPrefabStage();
-#endif
-
-			if (currentPrefabStage != null)
+    #else
+            var currentPrefabStage = UnityEditor.SceneManagement.PrefabStageUtility.GetCurrentPrefabStage();
+    #endif
+if (currentPrefabStage != null)
 			{
 				var prefabRoot = currentPrefabStage.prefabContentsRoot;
 				prefabRootTransform = prefabRoot.transform;

RealtimeCSG/Assets/Plugins/RealtimeCSG/Editor/Scripts/Control/Managers/SceneViewEventHandler.cs

@@ -9,87 +9,97 @@
 using UnityEngine.SceneManagement;
 using RealtimeCSG.Helpers;
 
+
 namespace RealtimeCSG
 {
-	internal sealed class SceneViewEventHandler
-	{
-		static bool mousePressed;
+    internal sealed class SceneViewEventHandler
+    {
+        static bool mousePressed;
 
         static int prevFocusControl;
 
-		internal static void OnScene(SceneView sceneView)
-		{
-            CSGSettings.RegisterSceneView(sceneView);
-            if (!RealtimeCSG.CSGSettings.EnableRealtimeCSG)
-				return;
-
-			if (EditorApplication.isPlayingOrWillChangePlaymode)
-				return;
-			UpdateLoop.UpdateOnSceneChange();
-
-			if (!RealtimeCSG.CSGSettings.EnableRealtimeCSG)
-				ColorSettings.isInitialized = false;
-			else
-			if (!ColorSettings.isInitialized)
-			{
-				if (Event.current.type == EventType.Repaint)
-				{
-					ColorSettings.Update();
-				}
-			}
-
-			if (!UpdateLoop.IsActive())
-				UpdateLoop.ResetUpdateRoutine();
-
-			if (Event.current.type == EventType.MouseDown ||
-				Event.current.type == EventType.MouseDrag) { mousePressed = true; }
-			else if (Event.current.type == EventType.MouseUp ||
-				Event.current.type == EventType.MouseMove) { mousePressed = false; }
-
-			SceneDragToolManager.OnHandleDragAndDrop(sceneView);
-			RectangleSelectionManager.Update(sceneView);
-			EditModeManager.InitSceneGUI(sceneView);
-
-			if (Event.current.type == EventType.Repaint)
-				MeshInstanceManager.UpdateHelperSurfaces();
-
-			if (Event.current.type == EventType.Repaint)
-			{
-				SceneToolRenderer.OnPaint(sceneView);
-			} else
-			//if (fallbackGUI)
-			{
-				SceneViewBottomBarGUI.ShowGUI(sceneView);
+        internal static void OnScene( SceneView sceneView )
+        {
+            CSGSettings.RegisterSceneView( sceneView );
+
+            if( !RealtimeCSG.CSGSettings.EnableRealtimeCSG )
+                return;
+
+            if( EditorApplication.isPlayingOrWillChangePlaymode )
+                return;
+
+            UpdateLoop.UpdateOnSceneChange();
+
+            if( !RealtimeCSG.CSGSettings.EnableRealtimeCSG )
+                ColorSettings.isInitialized = false;
+            else if( !ColorSettings.isInitialized )
+            {
+                if( Event.current.type == EventType.Repaint )
+                {
+                    ColorSettings.Update();
+                }
+            }
+
+            if( !UpdateLoop.IsActive() )
+                UpdateLoop.ResetUpdateRoutine();
+
+            if( Event.current.type == EventType.MouseDown || Event.current.type == EventType.MouseDrag )
+            {
+                mousePressed = true;
+            }
+            else if( Event.current.type == EventType.MouseUp || Event.current.type == EventType.MouseMove )
+            {
+                mousePressed = false;
+            }
+
+            SceneDragToolManager.OnHandleDragAndDrop( sceneView );
+            RectangleSelectionManager.Update( sceneView );
+            EditModeManager.InitSceneGUI( sceneView );
+
+            if( Event.current.type == EventType.Repaint )
+                MeshInstanceManager.UpdateHelperSurfaces();
+
+            if( Event.current.type == EventType.Repaint )
+            {
+                SceneToolRenderer.OnPaint( sceneView );
+            }
+            else
+                //if (fallbackGUI)
+            {
+                SceneViewBottomBarGUI.ShowGUI( sceneView );
                 SceneViewInfoGUI.DrawInfoGUI( sceneView );
-			}
-
-			EditModeManager.OnSceneGUI(sceneView);
-
-			//if (fallbackGUI)
-			{
-				TooltipUtility.InitToolTip(sceneView);
-				if (Event.current.type == EventType.Repaint)
-				{
-					SceneViewBottomBarGUI.ShowGUI(sceneView);
-                	SceneViewInfoGUI.DrawInfoGUI( sceneView );
-				}
-				if (!mousePressed)
-				{
-					Handles.BeginGUI();
-					TooltipUtility.DrawToolTip(getLastRect: false);
-					Handles.EndGUI();
-				}
-			}
-
-            if (Event.current.type == EventType.Layout)
+            }
+
+            EditModeManager.OnSceneGUI( sceneView );
+
+            //if (fallbackGUI)
+            {
+                TooltipUtility.InitToolTip( sceneView );
+
+                if( Event.current.type == EventType.Repaint )
+                {
+                    SceneViewBottomBarGUI.ShowGUI( sceneView, false );
+                    SceneViewInfoGUI.DrawInfoGUI( sceneView );
+                }
+
+                if( !mousePressed )
+                {
+                    Handles.BeginGUI();
+                    TooltipUtility.DrawToolTip( getLastRect: false );
+                    Handles.EndGUI();
+                }
+            }
+
+            if( Event.current.type == EventType.Layout )
             {
                 var currentFocusControl = CSGHandles.FocusControl;
-                if (prevFocusControl != currentFocusControl)
+
+                if( prevFocusControl != currentFocusControl )
                 {
                     prevFocusControl = currentFocusControl;
                     HandleUtility.Repaint();
                 }
             }
-		}
-	}
+        }
+    }
 }