GuiCommand: Name: Draft Layer MenuLocation: Utilities , Layer Workbenches: Draft_Workbench Version: 0.19 SeeAlso: Draft_AutoGroup, Draft_LayerManager

Draft Layer

Description

The Draft Layer command creates a Draft Layer. A layer is a special kind of group with a number of visual properties. These properties, and any changes to them, are propagated to the objects placed inside the layer. The layers themselves are put in another special group: the Draft LayerContainer.

Usage

1. There are several ways to invoke the command:
   • Press the Layer button.
   • Select the Utilities → Layer option from the menu, or from the Tree view or 3D view context menu.
   • If the layer container already exists: right-click it in the Tree view and select the Add new layer option from context menu.
2. If it does not exist the layer container is created first.
3. A layer is created and put in the layer container.
4. Optionally change the properties of the layer.
5. Optionally put objects in the layer by drag and dropping them on the layer in the Tree view. Objects can also be put in a layer by editing the Group property of the layer.
6. Optionally activate the layer.

Context menu

Layer container options

For a Draft LayerContainer these additional options are available in the Tree view context menu:

• Merge layer duplicates: merges all layers with the same base label.

: The base label of a layer is its Label stripped of trailing digits and spaces. All layers with the same base label are merged into a single layer with the Label set to that base label.

• Add new layer: adds a new layer to the current document.

Layer options

For a Draft Layer these additional options are available in the Tree view context menu:

• Activate this layer: activates the selected layer.

• Select layer contents: selects the objects inside the selected layer.

Drag and drop behavior

(v0.21)

If you drop an object from a Std Group, or a group-like object such as an Arch BuildingPart, on a layer in the Tree view, it is not removed from the group, and vice versa. To remove an object from a layer it must be dropped on another layer or on the document node. There is no need to hold down the Ctrl key when dragging from or dropping on a layer.

Notes

• A new layer can also be created with the Draft AutoGroup command.
• The BIM Workbench offers a complete layer manager tool which will eventually be included in the Draft Workbench.

Properties

See also: Property editor.

A Draft Layer object is derived from an App FeaturePython object and inherits all its properties. It also has the following additional properties:

Data

{{TitleProperty|Layer}}

• Group|LinkList: specifies the objects that are inside the layer.

View

{{TitleProperty|Layer}}

The properties in this section are applied to objects that are put inside the layer. And any changes to these properties are propagated to them. For two properties, Line Color and Shape Color, this behavior is optional.

• Draw Style|Enumeration: specifies the draw style of the layer: {{value|Solid}}, {{value|Dashed}}, {{value|Dotted}} or {{value|Dashdot}}

• Line Color|Color: specifies the line color of the layer.

• Line Width|Float: specifies the line width of the layer.

• Override Line Color Children|Bool: specifies if changes to the Line Color of the layer are propagated to the objects inside the layer.

• Override Shape Appearance Children|Bool: specifies if changes to the Shape Appearance of the layer are propagated to the objects inside the layer. (v1.0)

• Shape Appearance|MaterialList: specifies the shape appearance of the layer. (v1.0)

• Shape Color|Color|hidden: specifies the shape color of the layer. It is kept synchronized with the Diffuse Color of the Shape Appearance.

• Transparency|Percent: specifies the transparency of the layer. It is kept synchronized with the Transparency of the Shape Appearance.

{{TitleProperty|Print}}

• Line Print Color|Color: specifies the line print color of the layer.

• Use Print Color|Bool: specifies if the Line Print Color| of the layer is used when a TechDraw DraftView is created from the objects inside the layer.

Scripting

See also: Autogenerated API documentation and FreeCAD Scripting Basics.

To create a Draft Layer use the make_layer method of the Draft module. To add objects to, or remove objects from, a layer change its Group property.

import FreeCAD as App
import Draft

doc = App.newDocument()

layer = Draft.make_layer(line_color=(1.0, 0.0, 0.0, 0.0),
                         shape_color=(1.0, 1.0, 0.0, 0.0))

polygon1 = Draft.make_polygon(5, radius=1000)
polygon2 = Draft.make_polygon(3, radius=500)
polygon3 = Draft.make_polygon(6, radius=220)
layer.Group = [polygon1, polygon2, polygon3]

doc.recompute()

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