GtkCellLayout {RGtk2} | R Documentation

## GtkCellLayout

### Description

An interface for packing cells

### Methods and Functions

`gtkCellLayoutPackStart(object, cell, expand = TRUE)`
`gtkCellLayoutPackEnd(object, cell, expand = TRUE)`
`gtkCellLayoutGetCells(object)`
`gtkCellLayoutReorder(object, cell, position)`
`gtkCellLayoutClear(object)`
`gtkCellLayoutSetAttributes(object, cell, ...)`
`gtkCellLayoutAddAttribute(object, cell, attribute, column)`
`gtkCellLayoutSetCellDataFunc(object, cell, func, func.data = NULL)`
`gtkCellLayoutClearAttributes(object, cell)`

### Hierarchy

    GInterface
       +----GtkCellLayout

### Implementations

GtkCellLayout is implemented by `GtkCellView`, `GtkComboBox`, `GtkComboBoxEntry`, `GtkEntryCompletion`, `GtkIconView` and `GtkTreeViewColumn`.

### Detailed Description

`GtkCellLayout` is an interface to be implemented by all objects which want to provide a `GtkTreeViewColumn-like` API for packing cells, setting attributes and data funcs.

One of the notable features provided by implementations of GtkCellLayout are attributes. Attributes let you set the properties in flexible ways. They can just be set to constant values like regular properties. But they can also be mapped to a column of the underlying tree model with `gtkCellLayoutSetAttributes`, which means that the value of the attribute can change from cell to cell as they are rendered by the cell renderer. Finally, it is possible to specify a function with `gtkCellLayoutSetCellDataFunc` that is called to determine the value of the attribute for each cell that is rendered.

### GtkCellLayouts as GtkBuildable

Implementations of GtkCellLayout which also implement the GtkBuildable interface (`GtkCellView`, `GtkIconView`, `GtkComboBox`, `GtkComboBoxEntry`, `GtkEntryCompletion`, `GtkTreeViewColumn`) accept GtkCellRenderer objects as <child> elements in UI definitions. They support a custom <attributes> element for their children, which can contain multiple <attribute> elements. Each <attribute> element has a name attribute which specifies a property of the cell renderer; the content of the element is the attribute value.

A UI definition fragment specifying attributes

    <object class="GtkCellView">
      <child>
        <object class="GtkCellRendererText"/>
        <attributes>
          <attribute name="text">0</attribute>
        </attributes>
      </child>"
    </object>

### Structures

`GtkCellLayout`

  undocumented

### User Functions

`GtkCellLayoutDataFunc(cell.layout, cell, tree.model, iter, data)`

  A function which should set the value of `cell.layout`'s cell renderer(s) as appropriate.

  `cell.layout`

    a `GtkCellLayout`

  `cell`

    the cell renderer whose value is to be set

  `tree.model`

    the model

  `iter`

    a `GtkTreeIter` indicating the row to set the value for

  `data`

    user data passed to `gtkCellLayoutSetCellDataFunc`

### Author(s)

Derived by RGtkGen from GTK+ documentation

### References

https://developer.gnome.org/gtk2/stable/GtkCellLayout.html

[Package RGtk2 version 2.20.36.3 Index]