traitsui.tree_node_renderer module¶
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class
traitsui.tree_node_renderer.AbstractTreeNodeRenderer¶ Bases:
traits.has_traits.ABCHasStrictTraitsAbstract base class for renderers of tree node items.
This is currently only supported for Qt.
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get_label(node, object, column=0)¶ Get the label associated with an item and column.
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handles_all= Bool(False)¶ Whether the renderer handles rendering everything
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handles_icon= Bool(False)¶ Whether the renderer handles rendering the icon or other decoration
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handles_text= Bool(True)¶ Whether the renderer handles rendering any text
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paint(node, column, object, paint_context)¶ Render the node.
Parameters: - node (ITreeNode instance) – The tree node to render.
- column (int) – The column in the tree that should be rendererd.
- object (object) – The underlying object being edited.
- paint_context (object) – A toolkit-dependent context for performing paint operations.
Returns: size – Optionally return a new preferred size so that the toolkit can perform better layout.
Return type: tuple of (width, height) or None
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size(node, column, object, size_context)¶ Return the preferred size for the item
Parameters: - node (ITreeNode instance) – The tree node to render.
- column (int) – The column in the tree that should be rendererd.
- object (object) – The underlying object being edited.
- size_context (object) – A toolkit-dependent context for performing sizing operations.
Returns: size
Return type: tuple of (width, height) or None
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