path: root/docs/reference/gtk/tmpl/gtkcellrenderer.sgml

<!-- ##### SECTION Title ##### -->
GtkCellRenderer

<!-- ##### SECTION Short_Description ##### -->
An object for rendering a single cell on a GdkDrawable

<!-- ##### SECTION Long_Description ##### -->
<para>
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.
</para>

<para>
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 #GObject<!-- -->s 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().
</para>

<para>
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.
</para>

<para>
Beyond merely rendering a cell, cell renderers can optionally 
provide active user interface elements. A cell renderer can be 
<firstterm>activatable</firstterm> like #GtkCellRendererToggle, 
which toggles when it gets activated by a mouse click, or it can be 
<firstterm>editable</firstterm> 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.
</para>

<!-- ##### SECTION See_Also ##### -->
<para>
#GtkCellRendererText,#GtkCellRendererPixbuf,#GtkCellRendererToggle
</para>

<!-- ##### SECTION Stability_Level ##### -->


<!-- ##### ENUM GtkCellRendererState ##### -->
<para>
Tells how a cell is to be rendererd.
</para>

@GTK_CELL_RENDERER_SELECTED: The cell is currently selected, and
probably has a selection colored background to render to.
@GTK_CELL_RENDERER_PRELIT: The mouse is hovering over the cell.
@GTK_CELL_RENDERER_INSENSITIVE: The cell is drawn in an insensitive manner
@GTK_CELL_RENDERER_SORTED: The cell is in a sorted row
@GTK_CELL_RENDERER_FOCUSED: The cell is in the focus row.

<!-- ##### ENUM GtkCellRendererMode ##### -->
<para>
Identifies how the user can interact with a particular cell.
</para>

@GTK_CELL_RENDERER_MODE_INERT: The cell is just for display
and cannot be interacted with.  Note that this doesn't mean that eg. the
row being drawn can't be selected -- just that a particular element of
it cannot be individually modified.
@GTK_CELL_RENDERER_MODE_ACTIVATABLE: The cell can be clicked.
@GTK_CELL_RENDERER_MODE_EDITABLE: The cell can be edited or otherwise modified.

<!-- ##### STRUCT GtkCellRenderer ##### -->
<para>

</para>


<!-- ##### SIGNAL GtkCellRenderer::editing-canceled ##### -->
<para>

</para>

@cellrenderer: the object which received the signal.

<!-- ##### SIGNAL GtkCellRenderer::editing-started ##### -->
<para>

</para>

@cellrenderer: the object which received the signal.
@arg1: 
@arg2: 

<!-- ##### ARG GtkCellRenderer:cell-background ##### -->
<para>

</para>

<!-- ##### ARG GtkCellRenderer:cell-background-gdk ##### -->
<para>

</para>

<!-- ##### ARG GtkCellRenderer:cell-background-set ##### -->
<para>

</para>

<!-- ##### ARG GtkCellRenderer:editing ##### -->
<para>

</para>

<!-- ##### ARG GtkCellRenderer:height ##### -->
<para>

</para>

<!-- ##### ARG GtkCellRenderer:is-expanded ##### -->
<para>

</para>

<!-- ##### ARG GtkCellRenderer:is-expander ##### -->
<para>

</para>

<!-- ##### ARG GtkCellRenderer:mode ##### -->
<para>

</para>

<!-- ##### ARG GtkCellRenderer:sensitive ##### -->
<para>

</para>

<!-- ##### ARG GtkCellRenderer:visible ##### -->
<para>

</para>

<!-- ##### ARG GtkCellRenderer:width ##### -->
<para>

</para>

<!-- ##### ARG GtkCellRenderer:xalign ##### -->
<para>

</para>

<!-- ##### ARG GtkCellRenderer:xpad ##### -->
<para>

</para>

<!-- ##### ARG GtkCellRenderer:yalign ##### -->
<para>

</para>

<!-- ##### ARG GtkCellRenderer:ypad ##### -->
<para>

</para>

<!-- ##### STRUCT GtkCellRendererClass ##### -->
<para>

</para>

@parent_class: 
@get_size: 
@render: 
@activate: 
@start_editing: 
@editing_canceled: 
@editing_started: 
@_gtk_reserved1: 
@_gtk_reserved2: 

<!-- ##### FUNCTION gtk_cell_renderer_get_size ##### -->
<para>

</para>

@cell: 
@widget: 
@cell_area: 
@x_offset: 
@y_offset: 
@width: 
@height: 


<!-- ##### FUNCTION gtk_cell_renderer_render ##### -->
<para>

</para>

@cell: 
@window: 
@widget: 
@background_area: 
@cell_area: 
@expose_area: 
@flags: 


<!-- ##### FUNCTION gtk_cell_renderer_activate ##### -->
<para>

</para>

@cell: 
@event: 
@widget: 
@path: 
@background_area: 
@cell_area: 
@flags: 
@Returns: 


<!-- ##### FUNCTION gtk_cell_renderer_start_editing ##### -->
<para>

</para>

@cell: 
@event: 
@widget: 
@path: 
@background_area: 
@cell_area: 
@flags: 
@Returns: 


<!-- ##### FUNCTION gtk_cell_renderer_editing_canceled ##### -->
<para>

</para>

@cell: 


<!-- ##### FUNCTION gtk_cell_renderer_stop_editing ##### -->
<para>

</para>

@cell: 
@canceled: 


<!-- ##### FUNCTION gtk_cell_renderer_get_fixed_size ##### -->
<para>

</para>

@cell: 
@width: 
@height: 


<!-- ##### FUNCTION gtk_cell_renderer_set_fixed_size ##### -->
<para>

</para>

@cell: 
@width: 
@height: 


<!-- ##### FUNCTION gtk_cell_renderer_get_visible ##### -->
<para>

</para>

@cell: 
@Returns: 


<!-- ##### FUNCTION gtk_cell_renderer_set_visible ##### -->
<para>

</para>

@cell: 
@visible: 


<!-- ##### FUNCTION gtk_cell_renderer_get_sensitive ##### -->
<para>

</para>

@cell: 
@Returns: 


<!-- ##### FUNCTION gtk_cell_renderer_set_sensitive ##### -->
<para>

</para>

@cell: 
@sensitive: 


<!-- ##### FUNCTION gtk_cell_renderer_get_alignment ##### -->
<para>

</para>

@cell: 
@xalign: 
@yalign: 


<!-- ##### FUNCTION gtk_cell_renderer_set_alignment ##### -->
<para>

</para>

@cell: 
@xalign: 
@yalign: 


<!-- ##### FUNCTION gtk_cell_renderer_get_padding ##### -->
<para>

</para>

@cell: 
@xpad: 
@ypad: 


<!-- ##### FUNCTION gtk_cell_renderer_set_padding ##### -->
<para>

</para>

@cell: 
@xpad: 
@ypad: