private void BuildActionsPanel()
        {
            var layer        = project.selectedLayer;
            var layerActions = layer.actions;

            actions.Items.Clear();
            GUILayout.Reset();
            GUILayout.actionPropertyIndex = 0;

            // Draw layer specific properties.
            if (layer is LayerNoise layerNoise)
            {
                GUILayout.PropertyField(new SerializedProperty(layerNoise, "IsColor"));
                var btn = GUILayout.Button("Regenerate Noise");
                btn.Click += (sender, evt) => {
                    layerNoise.GenerateImage();
                    EventBus.OnLayerActionChanged(sender);
                };
            }

            // Draw the required primary transform.
            GUILayout.PropertyField(new SerializedProperty(Transform, "IsAnchored"));

            if (Transform.IsAnchored)
            {
                GUILayout.PropertyField(new SerializedProperty(Transform, "Anchor"));
            }
            else
            {
                GUILayout.PropertyField(new SerializedProperty(Transform, "Position"));
            }

            GUILayout.PropertyField(new SerializedProperty(Transform, "Rotation"));
            GUILayout.PropertyField(new SerializedProperty(Transform, "Scale"));

            // Call the draw method on all the layer actions (excluding the transform).
            foreach (var action in layerActions)
            {
                try {
                    action.Draw();
                } catch (DrawNotImplementedException) {
                    GUILayout.HandleNoDrawAction(action);
                }
            }

            // Add the the actions to the panel to be physically drawn to the screen.
            int index = 0;

            foreach (var guiAction in GUILayout.Actions)
            {
                var processingIndex = project.selectedLayer.ActionProcessingIndex;
                if (guiAction.Header != null)
                {
                    actions.Items.Add(guiAction.Header);
                }
                guiAction.Layer = project.selectedLayer;
                foreach (var panel in guiAction.panels)
                {
                    if (guiAction.action == null || !guiAction.action.Collapsed)
                    {
                        actions.Items.Add(panel);
                    }
                }
                if (guiAction.action != null && index > 0 && !guiAction.action.Collapsed)
                {
                    var progressBar = new ProgressBar {
                        IsIndeterminate = true,
                        Margin          = new Thickness(0, 5, 0, 0),
                        Visibility      = Visibility.Hidden,
                        Name            = $"ActionProgress_{index}"
                    };
                    actions.Items.Add(progressBar);
                }
                // if (guiAction.action != null && index < GUILayout.Actions.Count - 1) {
                var top       = guiAction.action != null && guiAction.action.Collapsed ? 0 : 10;
                var separator = new Separator {
                    Margin     = new Thickness(0, 0, 0, 0),
                    Background = new SolidColorBrush(Color.FromRgb(0x0, 0x0, 0x0))
                };
                actions.Items.Add(separator);
                // }
                index++;
            }
        }