private void Init(string title) { this.StyleFont(FontStyle.Bold); this.StyleMinHeight(20); this.StyleBorderWidth(0, 0, 1, 0); Color borderColor = EditorGUIUtility.isProSkin ? new Color32(35, 35, 35, 255) : new Color32(153, 153, 153, 255); this.StyleBorderColor(borderColor); headerElement = new HorizontalLayout(); headerElement.StyleHeight(21); headerElement.StyleMaxHeight(21); headerElement.StyleMinHeight(21); headerElement.StylePadding(4, 0, 0, 0); headerElement.StyleAlignItem(Align.Center); Color backgroundColor = EditorGUIUtility.isProSkin ? new Color32(80, 80, 80, 255) : new Color32(222, 222, 222, 255); headerElement.StyleBackgroundColor(backgroundColor); Color hoverBorderColor = new Color32(58, 121, 187, 255); headerElement.RegisterCallback <MouseEnterEvent>((evt) => { headerElement.StyleBorderWidth(1); headerElement.StyleBorderColor(hoverBorderColor); }); headerElement.RegisterCallback <MouseLeaveEvent>((evt) => { headerElement.StyleBorderWidth(0); headerElement.StyleBorderColor(Color.clear); }); base.Add(headerElement); contentElement = new VerticalLayout(); contentElement.StyleDisplay(value); base.Add(contentElement); labelElement = new Label(); labelElement.text = title; headerElement.Add(labelElement); imageElement = new Image(); imageElement.name = nameof(imageElement); imageElement.StyleMargin(0, 4, 0, 0); imageElement.StyleSize(16, 16); headerElement.Add(imageElement); imageElement.SendToBack(); imageElement.RegisterCallback <GeometryChangedEvent>((evt) => { imageElement.StyleDisplay(imageElement.image == null ? DisplayStyle.None : DisplayStyle.Flex); }); foloutImage = new Image(); foloutImage.StyleWidth(13); foloutImage.StyleMargin(0, 2, 0, 0); foloutImage.scaleMode = ScaleMode.ScaleToFit; foloutImage.image = value ? onIcon : offIcon; if (!EditorGUIUtility.isProSkin) { foloutImage.tintColor = Color.grey; } headerElement.Add(foloutImage); foloutImage.SendToBack(); headerElement.RegisterCallback <MouseUpEvent>((evt) => { if (evt.button == 0) { Value = !Value; evt.StopPropagation(); } }); }