GtkCellRenderer

## GtkCellRenderer GtkCellRenderer — An object for rendering a single cell on a GdkDrawable |

## Includes

    #include <gtk/gtk.h>

## Description

The GtkCellRenderer is a base class of a set of objects used for rendering a cell to a GdkDrawable. These objects are used primarily by the GtkTreeView widget, though they aren't tied to them in any specific way. It is worth noting that GtkCellRenderer is not a GtkWidget and cannot be treated as such.

The primary use of a GtkCellRenderer is for drawing a certain graphical elements on a GdkDrawable. Typically, one cell renderer is used to draw many cells on the screen. To this extent, it isn't expected that a CellRenderer keep any permanent state around. Instead, any state is set just prior to use using GObjects property system. Then, the cell is measured using `gtk_cell_renderer_get_size()`. Finally, the cell is rendered in the correct location using `gtk_cell_renderer_render()`.

There are a number of rules that must be followed when writing a new GtkCellRenderer. First and formost, it's important that a certain set of properties will always yield a cell renderer of the same size, barring a GtkStyle change. The GtkCellRenderer also has a number of generic properties that are expected to be honored by all children.

Beyond merely rendering a cell, cell renderers can optionally provide active user interface elements. A cell renderer can be activatable like GtkCellRendererToggle, which toggles when it gets activated by a mouse click, or it can be editable like GtkCellRendererText, which allows the user to edit the text using a GtkEntry. To make a cell renderer activatable or editable, you have to implement the `activate` or `start_editing` virtual functions, respectively.

## Functions

## Types and Values

## See Also

GtkCellRendererText,GtkCellRendererPixbuf,GtkCellRendererToggle