UnityEditor.TerrainInspector.OnInspectorGUI C# (CSharp) Method

        public override void OnInspectorGUI()
        {
            this.Initialize();
            if (styles == null)
            {
                styles = new Styles();
            }
            if (this.m_Terrain.terrainData == null)
            {
                GUI.enabled = false;
                GUILayout.BeginHorizontal(new GUILayoutOption[0]);
                GUILayout.FlexibleSpace();
                GUILayout.Toolbar(-1, styles.toolIcons, styles.command, new GUILayoutOption[0]);
                GUILayout.FlexibleSpace();
                GUILayout.EndHorizontal();
                GUI.enabled = true;
                GUILayout.BeginVertical(EditorStyles.helpBox, new GUILayoutOption[0]);
                GUILayout.Label("Terrain Asset Missing", new GUILayoutOption[0]);
                this.m_Terrain.terrainData = EditorGUILayout.ObjectField("Assign:", this.m_Terrain.terrainData, typeof(TerrainData), false, new GUILayoutOption[0]) as TerrainData;
                GUILayout.EndVertical();
            }
            else
            {
                if (Event.current.type == EventType.Layout)
                {
                    this.m_TerrainCollider = this.m_Terrain.gameObject.GetComponent<TerrainCollider>();
                }
                if ((this.m_TerrainCollider != null) && (this.m_TerrainCollider.terrainData != this.m_Terrain.terrainData))
                {
                    GUILayout.BeginVertical(EditorStyles.helpBox, new GUILayoutOption[0]);
                    GUILayout.Label(styles.mismatchedTerrainData, EditorStyles.wordWrappedLabel, new GUILayoutOption[0]);
                    GUILayout.Space(3f);
                    GUILayoutOption[] options = new GUILayoutOption[] { GUILayout.ExpandWidth(false) };
                    if (GUILayout.Button(styles.assign, options))
                    {
                        Undo.RecordObject(this.m_TerrainCollider, "Assign TerrainData");
                        this.m_TerrainCollider.terrainData = this.m_Terrain.terrainData;
                    }
                    GUILayout.Space(3f);
                    GUILayout.EndVertical();
                }
                GUILayout.BeginHorizontal(new GUILayoutOption[0]);
                GUILayout.FlexibleSpace();
                GUI.changed = false;
                int selectedTool = (int) this.selectedTool;
                this.selectedTool = (TerrainTool) GUILayout.Toolbar(selectedTool, styles.toolIcons, styles.command, new GUILayoutOption[0]);
                if ((this.selectedTool != selectedTool) && (Toolbar.get != null))
                {
                    Toolbar.get.Repaint();
                }
                GUILayout.FlexibleSpace();
                GUILayout.EndHorizontal();
                this.CheckKeys();
                GUILayout.BeginVertical(EditorStyles.helpBox, new GUILayoutOption[0]);
                if ((selectedTool >= 0) && (selectedTool < styles.toolIcons.Length))
                {
                    GUILayout.Label(styles.toolNames[selectedTool].text, new GUILayoutOption[0]);
                    GUILayout.Label(styles.toolNames[selectedTool].tooltip, EditorStyles.wordWrappedMiniLabel, new GUILayoutOption[0]);
                }
                else
                {
                    GUILayout.Label("No tool selected", new GUILayoutOption[0]);
                    GUILayout.Label("Please select a tool", EditorStyles.wordWrappedMiniLabel, new GUILayoutOption[0]);
                }
                GUILayout.EndVertical();
                switch (((TerrainTool) selectedTool))
                {
                    case TerrainTool.PaintHeight:
                        this.ShowRaiseHeight();
                        break;

                    case TerrainTool.SetHeight:
                        this.ShowSetHeight();
                        break;

                    case TerrainTool.SmoothHeight:
                        this.ShowSmoothHeight();
                        break;

                    case TerrainTool.PaintTexture:
                        this.ShowTextures();
                        break;

                    case TerrainTool.PlaceTree:
                        this.ShowTrees();
                        break;

                    case TerrainTool.PaintDetail:
                        this.ShowDetails();
                        break;

                    case TerrainTool.TerrainSettings:
                        this.ShowSettings();
                        break;
                }
                GUILayout.Space(5f);
            }
        }