1 <!-- ##### SECTION Title ##### -->
4 <!-- ##### SECTION Short_Description ##### -->
5 An object for rendering a single cell on a #GdkDrawable
7 <!-- ##### SECTION Long_Description ##### -->
9 The #GtkCellRenderer is a base class of a set of objects used for
10 rendering a cell to a #GdkDrawable. These objects are used primarily by
11 the #GtkTreeView widget, though they aren't tied to them in any
12 specific way. It is worth noting that #GtkCellRenderer is not a
13 #GtkWidget and cannot be treated as such.
17 The primary use of a #GtkCellRenderer is for drawing a certain graphical
18 elements on a #GdkDrawable. Typically, one cell renderer is used to
19 draw many cells on the screen. To this extent, it isn't expected that a
20 CellRenderer keep any permanent state around. Instead, any state is set
21 just prior to use using #GObject<!-- -->s property system. Then, the
22 cell is measured using gtk_cell_renderer_get_size(). Finally, the cell
23 is rendered in the correct location using gtk_cell_renderer_render().
27 There are a number of rules that must be followed when writing a new
28 #GtkCellRenderer. First and formost, it's important that a certain set
29 of properties will always yield a cell renderer of the same size,
30 barring a #GtkStyle change. The #GtkCellRenderer also has a number of
31 generic properties that are expected to be honored by all children.
35 Beyond merely rendering a cell, cell renderers can optionally
36 provide active user interface elements. A cell renderer can be
37 <firstterm>activatable</firstterm> like #GtkCellRendererToggle,
38 which toggles when it gets activated by a mouse click, or it can be
39 <firstterm>editable</firstterm> like #GtkCellRendererText, which
40 allows the user to edit the text using a #GtkEntry.
41 To make a cell renderer activatable or editable, you have to
42 implement the @activate or @start_editing virtual functions,
46 <!-- ##### SECTION See_Also ##### -->
48 #GtkCellRendererText,#GtkCellRendererPixbuf,#GtkCellRendererToggle
51 <!-- ##### ENUM GtkCellRendererState ##### -->
53 Tells how a cell is to be rendererd.
56 @GTK_CELL_RENDERER_SELECTED: The cell is currently selected, and
57 probably has a selection colored background to render to.
58 @GTK_CELL_RENDERER_PRELIT: The mouse is hovering over the cell.
59 @GTK_CELL_RENDERER_INSENSITIVE: The cell is drawn in an insensitive manner
60 @GTK_CELL_RENDERER_SORTED: The cell is in a sorted row
61 @GTK_CELL_RENDERER_FOCUSED:
63 <!-- ##### ENUM GtkCellRendererMode ##### -->
65 Identifies how the user can interact with a particular cell.
68 @GTK_CELL_RENDERER_MODE_INERT: The cell is just for display
69 and cannot be interacted with. Note that this doesn't mean that eg. the
70 row being drawn can't be selected -- just that a particular element of
71 it cannot be individually modified.
72 @GTK_CELL_RENDERER_MODE_ACTIVATABLE: The cell can be clicked.
73 @GTK_CELL_RENDERER_MODE_EDITABLE: The cell can be edited or otherwise modified.
75 <!-- ##### STRUCT GtkCellRenderer ##### -->
81 <!-- ##### SIGNAL GtkCellRenderer::editing-canceled ##### -->
86 @cellrenderer: the object which received the signal.
88 <!-- ##### SIGNAL GtkCellRenderer::editing-started ##### -->
93 @cellrenderer: the object which received the signal.
97 <!-- ##### ARG GtkCellRenderer:cell-background ##### -->
102 <!-- ##### ARG GtkCellRenderer:cell-background-gdk ##### -->
107 <!-- ##### ARG GtkCellRenderer:cell-background-set ##### -->
112 <!-- ##### ARG GtkCellRenderer:height ##### -->
117 <!-- ##### ARG GtkCellRenderer:is-expanded ##### -->
122 <!-- ##### ARG GtkCellRenderer:is-expander ##### -->
127 <!-- ##### ARG GtkCellRenderer:mode ##### -->
132 <!-- ##### ARG GtkCellRenderer:sensitive ##### -->
137 <!-- ##### ARG GtkCellRenderer:visible ##### -->
142 <!-- ##### ARG GtkCellRenderer:width ##### -->
147 <!-- ##### ARG GtkCellRenderer:xalign ##### -->
152 <!-- ##### ARG GtkCellRenderer:xpad ##### -->
157 <!-- ##### ARG GtkCellRenderer:yalign ##### -->
162 <!-- ##### ARG GtkCellRenderer:ypad ##### -->
167 <!-- ##### FUNCTION gtk_cell_renderer_get_size ##### -->
181 <!-- ##### FUNCTION gtk_cell_renderer_render ##### -->
195 <!-- ##### FUNCTION gtk_cell_renderer_activate ##### -->
210 <!-- ##### FUNCTION gtk_cell_renderer_start_editing ##### -->
225 <!-- ##### FUNCTION gtk_cell_renderer_editing_canceled ##### -->
233 <!-- ##### FUNCTION gtk_cell_renderer_stop_editing ##### -->
242 <!-- ##### FUNCTION gtk_cell_renderer_get_fixed_size ##### -->
252 <!-- ##### FUNCTION gtk_cell_renderer_set_fixed_size ##### -->