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gtk3/gtk/gtkcellrenderer.c

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/* gtkcellrenderer.c
* Copyright (C) 2000 Red Hat, Inc. Jonathan Blandford
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkcellrenderer.h"
#include "gtkintl.h"
#include "gtkmarshalers.h"
#include "gtktypebuiltins.h"
#include "gtkprivate.h"
#include "gtktreeprivate.h"
#include "a11y/gtkrenderercellaccessible.h"
/**
* SECTION:gtkcellrenderer
* @Short_description: An object for rendering a single cell
* @Title: GtkCellRenderer
* @See_also: #GtkCellRendererText, #GtkCellRendererPixbuf, #GtkCellRendererToggle
*
* The #GtkCellRenderer is a base class of a set of objects used for
* rendering a cell to a #cairo_t. 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 #cairo_t. 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 foremost, 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 #GtkCellRendererClass.activate or
* #GtkCellRendererClass.start_editing virtual functions, respectively.
*
* Many properties of #GtkCellRenderer and its subclasses have a
* corresponding “set” property, e.g. “cell-background-set” corresponds
* to “cell-background”. These “set” properties reflect whether a property
* has been set or not. You should not set them independently.
*/
#define DEBUG_CELL_SIZE_REQUEST 0
static void gtk_cell_renderer_init (GtkCellRenderer *cell);
static void gtk_cell_renderer_class_init (GtkCellRendererClass *class);
static void gtk_cell_renderer_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec);
static void gtk_cell_renderer_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec);
static void set_cell_bg_color (GtkCellRenderer *cell,
GdkRGBA *rgba);
/* Fallback GtkCellRenderer implementation to use remaining ->get_size() implementations */
static GtkSizeRequestMode gtk_cell_renderer_real_get_request_mode(GtkCellRenderer *cell);
static void gtk_cell_renderer_real_get_preferred_width (GtkCellRenderer *cell,
GtkWidget *widget,
gint *minimum_size,
gint *natural_size);
static void gtk_cell_renderer_real_get_preferred_height (GtkCellRenderer *cell,
GtkWidget *widget,
gint *minimum_size,
gint *natural_size);
static void gtk_cell_renderer_real_get_preferred_height_for_width(GtkCellRenderer *cell,
GtkWidget *widget,
gint width,
gint *minimum_height,
gint *natural_height);
static void gtk_cell_renderer_real_get_preferred_width_for_height(GtkCellRenderer *cell,
GtkWidget *widget,
gint height,
gint *minimum_width,
gint *natural_width);
static void gtk_cell_renderer_real_get_aligned_area (GtkCellRenderer *cell,
GtkWidget *widget,
GtkCellRendererState flags,
const GdkRectangle *cell_area,
GdkRectangle *aligned_area);
struct _GtkCellRendererPrivate
{
gfloat xalign;
gfloat yalign;
gint width;
gint height;
guint16 xpad;
guint16 ypad;
guint mode : 2;
guint visible : 1;
guint is_expander : 1;
guint is_expanded : 1;
guint cell_background_set : 1;
guint sensitive : 1;
guint editing : 1;
GdkRGBA cell_background;
};
struct _GtkCellRendererClassPrivate
{
GType accessible_type;
};
enum {
PROP_0,
PROP_MODE,
PROP_VISIBLE,
PROP_SENSITIVE,
PROP_XALIGN,
PROP_YALIGN,
PROP_XPAD,
PROP_YPAD,
PROP_WIDTH,
PROP_HEIGHT,
PROP_IS_EXPANDER,
PROP_IS_EXPANDED,
PROP_CELL_BACKGROUND,
PROP_CELL_BACKGROUND_GDK,
PROP_CELL_BACKGROUND_RGBA,
PROP_CELL_BACKGROUND_SET,
PROP_EDITING
};
/* Signal IDs */
enum {
EDITING_CANCELED,
EDITING_STARTED,
LAST_SIGNAL
};
static gint GtkCellRenderer_private_offset;
static guint cell_renderer_signals[LAST_SIGNAL] = { 0 };
static inline gpointer
gtk_cell_renderer_get_instance_private (GtkCellRenderer *self)
{
return (G_STRUCT_MEMBER_P (self, GtkCellRenderer_private_offset));
}
static void
gtk_cell_renderer_init (GtkCellRenderer *cell)
{
GtkCellRendererPrivate *priv;
cell->priv = gtk_cell_renderer_get_instance_private (cell);
priv = cell->priv;
priv->mode = GTK_CELL_RENDERER_MODE_INERT;
priv->visible = TRUE;
priv->width = -1;
priv->height = -1;
priv->xalign = 0.5;
priv->yalign = 0.5;
priv->xpad = 0;
priv->ypad = 0;
priv->sensitive = TRUE;
priv->is_expander = FALSE;
priv->is_expanded = FALSE;
priv->editing = FALSE;
}
static void
gtk_cell_renderer_class_init (GtkCellRendererClass *class)
{
GObjectClass *object_class = G_OBJECT_CLASS (class);
object_class->get_property = gtk_cell_renderer_get_property;
object_class->set_property = gtk_cell_renderer_set_property;
class->render = NULL;
class->get_size = NULL;
class->get_request_mode = gtk_cell_renderer_real_get_request_mode;
class->get_preferred_width = gtk_cell_renderer_real_get_preferred_width;
class->get_preferred_height = gtk_cell_renderer_real_get_preferred_height;
class->get_preferred_width_for_height = gtk_cell_renderer_real_get_preferred_width_for_height;
class->get_preferred_height_for_width = gtk_cell_renderer_real_get_preferred_height_for_width;
class->get_aligned_area = gtk_cell_renderer_real_get_aligned_area;
/**
* GtkCellRenderer::editing-canceled:
* @renderer: the object which received the signal
*
* This signal gets emitted when the user cancels the process of editing a
* cell. For example, an editable cell renderer could be written to cancel
* editing when the user presses Escape.
*
* See also: gtk_cell_renderer_stop_editing().
*
* Since: 2.4
*/
cell_renderer_signals[EDITING_CANCELED] =
g_signal_new (I_("editing-canceled"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkCellRendererClass, editing_canceled),
NULL, NULL,
NULL,
G_TYPE_NONE, 0);
/**
* GtkCellRenderer::editing-started:
* @renderer: the object which received the signal
* @editable: the #GtkCellEditable
* @path: the path identifying the edited cell
*
* This signal gets emitted when a cell starts to be edited.
* The intended use of this signal is to do special setup
* on @editable, e.g. adding a #GtkEntryCompletion or setting
* up additional columns in a #GtkComboBox.
*
* Note that GTK+ doesn't guarantee that cell renderers will
* continue to use the same kind of widget for editing in future
* releases, therefore you should check the type of @editable
* before doing any specific setup, as in the following example:
* |[<!-- language="C" -->
* static void
* text_editing_started (GtkCellRenderer *cell,
* GtkCellEditable *editable,
* const gchar *path,
* gpointer data)
* {
* if (GTK_IS_ENTRY (editable))
* {
* GtkEntry *entry = GTK_ENTRY (editable);
*
* // ... create a GtkEntryCompletion
*
* gtk_entry_set_completion (entry, completion);
* }
* }
* ]|
*
* Since: 2.6
*/
cell_renderer_signals[EDITING_STARTED] =
g_signal_new (I_("editing-started"),
G_OBJECT_CLASS_TYPE (object_class),
G_SIGNAL_RUN_FIRST,
G_STRUCT_OFFSET (GtkCellRendererClass, editing_started),
NULL, NULL,
_gtk_marshal_VOID__OBJECT_STRING,
G_TYPE_NONE, 2,
GTK_TYPE_CELL_EDITABLE,
G_TYPE_STRING);
g_object_class_install_property (object_class,
PROP_MODE,
g_param_spec_enum ("mode",
P_("mode"),
P_("Editable mode of the CellRenderer"),
GTK_TYPE_CELL_RENDERER_MODE,
GTK_CELL_RENDERER_MODE_INERT,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
g_object_class_install_property (object_class,
PROP_VISIBLE,
g_param_spec_boolean ("visible",
P_("visible"),
P_("Display the cell"),
TRUE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
g_object_class_install_property (object_class,
PROP_SENSITIVE,
g_param_spec_boolean ("sensitive",
P_("Sensitive"),
P_("Display the cell sensitive"),
TRUE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
g_object_class_install_property (object_class,
PROP_XALIGN,
g_param_spec_float ("xalign",
P_("xalign"),
P_("The x-align"),
0.0,
1.0,
0.5,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
g_object_class_install_property (object_class,
PROP_YALIGN,
g_param_spec_float ("yalign",
P_("yalign"),
P_("The y-align"),
0.0,
1.0,
0.5,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
g_object_class_install_property (object_class,
PROP_XPAD,
g_param_spec_uint ("xpad",
P_("xpad"),
P_("The xpad"),
0,
G_MAXUINT,
0,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
g_object_class_install_property (object_class,
PROP_YPAD,
g_param_spec_uint ("ypad",
P_("ypad"),
P_("The ypad"),
0,
G_MAXUINT,
0,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
g_object_class_install_property (object_class,
PROP_WIDTH,
g_param_spec_int ("width",
P_("width"),
P_("The fixed width"),
-1,
G_MAXINT,
-1,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
g_object_class_install_property (object_class,
PROP_HEIGHT,
g_param_spec_int ("height",
P_("height"),
P_("The fixed height"),
-1,
G_MAXINT,
-1,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
g_object_class_install_property (object_class,
PROP_IS_EXPANDER,
g_param_spec_boolean ("is-expander",
P_("Is Expander"),
P_("Row has children"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
g_object_class_install_property (object_class,
PROP_IS_EXPANDED,
g_param_spec_boolean ("is-expanded",
P_("Is Expanded"),
P_("Row is an expander row, and is expanded"),
FALSE,
GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY));
g_object_class_install_property (object_class,
PROP_CELL_BACKGROUND,
g_param_spec_string ("cell-background",
P_("Cell background color name"),
P_("Cell background color as a string"),
NULL,
GTK_PARAM_WRITABLE));
/**
* GtkCellRenderer:cell-background-gdk:
*
* Cell background as a #GdkColor
*
* Deprecated: 3.4: Use #GtkCellRenderer:cell-background-rgba instead.
*/
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
g_object_class_install_property (object_class,
PROP_CELL_BACKGROUND_GDK,
g_param_spec_boxed ("cell-background-gdk",
P_("Cell background color"),
P_("Cell background color as a GdkColor"),
GDK_TYPE_COLOR,
GTK_PARAM_READWRITE|G_PARAM_DEPRECATED));
G_GNUC_END_IGNORE_DEPRECATIONS
/**
* GtkCellRenderer:cell-background-rgba:
*
* Cell background as a #GdkRGBA
*
* Since: 3.0
*/
g_object_class_install_property (object_class,
PROP_CELL_BACKGROUND_RGBA,
g_param_spec_boxed ("cell-background-rgba",
P_("Cell background RGBA color"),
P_("Cell background color as a GdkRGBA"),
GDK_TYPE_RGBA,
GTK_PARAM_READWRITE));
g_object_class_install_property (object_class,
PROP_EDITING,
g_param_spec_boolean ("editing",
P_("Editing"),
P_("Whether the cell renderer is currently in editing mode"),
FALSE,
GTK_PARAM_READABLE));
#define ADD_SET_PROP(propname, propval, nick, blurb) g_object_class_install_property (object_class, propval, g_param_spec_boolean (propname, nick, blurb, FALSE, GTK_PARAM_READWRITE|G_PARAM_EXPLICIT_NOTIFY))
ADD_SET_PROP ("cell-background-set", PROP_CELL_BACKGROUND_SET,
P_("Cell background set"),
P_("Whether the cell background color is set"));
if (GtkCellRenderer_private_offset != 0)
g_type_class_adjust_private_offset (class, &GtkCellRenderer_private_offset);
gtk_cell_renderer_class_set_accessible_type (class, GTK_TYPE_RENDERER_CELL_ACCESSIBLE);
}
static void
gtk_cell_renderer_base_class_init (gpointer g_class)
{
GtkCellRendererClass *klass = g_class;
klass->priv = G_TYPE_CLASS_GET_PRIVATE (g_class, GTK_TYPE_CELL_RENDERER, GtkCellRendererClassPrivate);
}
GType
gtk_cell_renderer_get_type (void)
{
static GType cell_renderer_type = 0;
if (G_UNLIKELY (cell_renderer_type == 0))
{
const GTypeInfo cell_renderer_info =
{
sizeof (GtkCellRendererClass),
gtk_cell_renderer_base_class_init,
NULL,
(GClassInitFunc) gtk_cell_renderer_class_init,
NULL, /* class_finalize */
NULL, /* class_init */
sizeof (GtkWidget),
0, /* n_preallocs */
(GInstanceInitFunc) gtk_cell_renderer_init,
NULL, /* value_table */
};
cell_renderer_type = g_type_register_static (G_TYPE_INITIALLY_UNOWNED, "GtkCellRenderer",
&cell_renderer_info, G_TYPE_FLAG_ABSTRACT);
GtkCellRenderer_private_offset =
g_type_add_instance_private (cell_renderer_type, sizeof (GtkCellRendererPrivate));
g_type_add_class_private (cell_renderer_type, sizeof (GtkCellRendererClassPrivate));
}
return cell_renderer_type;
}
static void
gtk_cell_renderer_get_property (GObject *object,
guint param_id,
GValue *value,
GParamSpec *pspec)
{
GtkCellRenderer *cell = GTK_CELL_RENDERER (object);
GtkCellRendererPrivate *priv = cell->priv;
switch (param_id)
{
case PROP_MODE:
g_value_set_enum (value, priv->mode);
break;
case PROP_VISIBLE:
g_value_set_boolean (value, priv->visible);
break;
case PROP_SENSITIVE:
g_value_set_boolean (value, priv->sensitive);
break;
case PROP_EDITING:
g_value_set_boolean (value, priv->editing);
break;
case PROP_XALIGN:
g_value_set_float (value, priv->xalign);
break;
case PROP_YALIGN:
g_value_set_float (value, priv->yalign);
break;
case PROP_XPAD:
g_value_set_uint (value, priv->xpad);
break;
case PROP_YPAD:
g_value_set_uint (value, priv->ypad);
break;
case PROP_WIDTH:
g_value_set_int (value, priv->width);
break;
case PROP_HEIGHT:
g_value_set_int (value, priv->height);
break;
case PROP_IS_EXPANDER:
g_value_set_boolean (value, priv->is_expander);
break;
case PROP_IS_EXPANDED:
g_value_set_boolean (value, priv->is_expanded);
break;
case PROP_CELL_BACKGROUND_GDK:
{
GdkColor color;
color.red = (guint16) (priv->cell_background.red * 65535);
color.green = (guint16) (priv->cell_background.green * 65535);
color.blue = (guint16) (priv->cell_background.blue * 65535);
g_value_set_boxed (value, &color);
}
break;
case PROP_CELL_BACKGROUND_RGBA:
g_value_set_boxed (value, &priv->cell_background);
break;
case PROP_CELL_BACKGROUND_SET:
g_value_set_boolean (value, priv->cell_background_set);
break;
case PROP_CELL_BACKGROUND:
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
gtk_cell_renderer_set_property (GObject *object,
guint param_id,
const GValue *value,
GParamSpec *pspec)
{
GtkCellRenderer *cell = GTK_CELL_RENDERER (object);
GtkCellRendererPrivate *priv = cell->priv;
switch (param_id)
{
case PROP_MODE:
if (priv->mode != g_value_get_enum (value))
{
priv->mode = g_value_get_enum (value);
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_VISIBLE:
if (priv->visible != g_value_get_boolean (value))
{
priv->visible = g_value_get_boolean (value);
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_SENSITIVE:
if (priv->sensitive != g_value_get_boolean (value))
{
priv->sensitive = g_value_get_boolean (value);
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_XALIGN:
if (priv->xalign != g_value_get_float (value))
{
priv->xalign = g_value_get_float (value);
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_YALIGN:
if (priv->yalign != g_value_get_float (value))
{
priv->yalign = g_value_get_float (value);
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_XPAD:
if (priv->xpad != g_value_get_uint (value))
{
priv->xpad = g_value_get_uint (value);
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_YPAD:
if (priv->ypad != g_value_get_uint (value))
{
priv->ypad = g_value_get_uint (value);
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_WIDTH:
if (priv->width != g_value_get_int (value))
{
priv->width = g_value_get_int (value);
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_HEIGHT:
if (priv->height != g_value_get_int (value))
{
priv->height = g_value_get_int (value);
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_IS_EXPANDER:
if (priv->is_expander != g_value_get_boolean (value))
{
priv->is_expander = g_value_get_boolean (value);
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_IS_EXPANDED:
if (priv->is_expanded != g_value_get_boolean (value))
{
priv->is_expanded = g_value_get_boolean (value);
g_object_notify_by_pspec (object, pspec);
}
break;
case PROP_CELL_BACKGROUND:
{
GdkRGBA rgba;
if (!g_value_get_string (value))
set_cell_bg_color (cell, NULL);
else if (gdk_rgba_parse (&rgba, g_value_get_string (value)))
set_cell_bg_color (cell, &rgba);
else
g_warning ("Don't know color '%s'", g_value_get_string (value));
g_object_notify (object, "cell-background");
}
break;
case PROP_CELL_BACKGROUND_GDK:
{
GdkColor *color;
color = g_value_get_boxed (value);
if (color)
{
GdkRGBA rgba;
rgba.red = color->red / 65535.;
rgba.green = color->green / 65535.;
rgba.blue = color->blue / 65535.;
rgba.alpha = 1;
set_cell_bg_color (cell, &rgba);
}
else
{
set_cell_bg_color (cell, NULL);
}
g_object_notify (object, "cell-background-gdk");
}
break;
case PROP_CELL_BACKGROUND_RGBA:
set_cell_bg_color (cell, g_value_get_boxed (value));
break;
case PROP_CELL_BACKGROUND_SET:
if (priv->cell_background_set != g_value_get_boolean (value))
{
priv->cell_background_set = g_value_get_boolean (value);
g_object_notify (object, "cell-background-set");
}
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, param_id, pspec);
break;
}
}
static void
set_cell_bg_color (GtkCellRenderer *cell,
GdkRGBA *rgba)
{
GtkCellRendererPrivate *priv = cell->priv;
if (rgba)
{
if (!priv->cell_background_set)
{
priv->cell_background_set = TRUE;
g_object_notify (G_OBJECT (cell), "cell-background-set");
}
priv->cell_background = *rgba;
}
else
{
if (priv->cell_background_set)
{
priv->cell_background_set = FALSE;
g_object_notify (G_OBJECT (cell), "cell-background-set");
}
}
g_object_notify (G_OBJECT (cell), "cell-background-rgba");
}
/**
* gtk_cell_renderer_get_size:
* @cell: a #GtkCellRenderer
* @widget: the widget the renderer is rendering to
* @cell_area: (allow-none): The area a cell will be allocated, or %NULL
* @x_offset: (out) (allow-none): location to return x offset of cell relative to @cell_area, or %NULL
* @y_offset: (out) (allow-none): location to return y offset of cell relative to @cell_area, or %NULL
* @width: (out) (allow-none): location to return width needed to render a cell, or %NULL
* @height: (out) (allow-none): location to return height needed to render a cell, or %NULL
*
* Obtains the width and height needed to render the cell. Used by view
* widgets to determine the appropriate size for the cell_area passed to
* gtk_cell_renderer_render(). If @cell_area is not %NULL, fills in the
* x and y offsets (if set) of the cell relative to this location.
*
* Please note that the values set in @width and @height, as well as those
* in @x_offset and @y_offset are inclusive of the xpad and ypad properties.
*
*
* Deprecated: 3.0: Use gtk_cell_renderer_get_preferred_size() instead.
**/
void
gtk_cell_renderer_get_size (GtkCellRenderer *cell,
GtkWidget *widget,
const GdkRectangle *cell_area,
gint *x_offset,
gint *y_offset,
gint *width,
gint *height)
{
GtkRequisition request;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
gtk_cell_renderer_get_preferred_size (cell, widget, &request, NULL);
if (width)
*width = request.width;
if (height)
*height = request.height;
if (cell_area)
_gtk_cell_renderer_calc_offset (cell, cell_area, gtk_widget_get_direction (widget),
request.width, request.height, x_offset, y_offset);
}
/**
* gtk_cell_renderer_render:
* @cell: a #GtkCellRenderer
* @cr: a cairo context to draw to
* @widget: the widget owning @window
* @background_area: entire cell area (including tree expanders and maybe
* padding on the sides)
* @cell_area: area normally rendered by a cell renderer
* @flags: flags that affect rendering
*
* Invokes the virtual render function of the #GtkCellRenderer. The three
* passed-in rectangles are areas in @cr. Most renderers will draw within
* @cell_area; the xalign, yalign, xpad, and ypad fields of the #GtkCellRenderer
* should be honored with respect to @cell_area. @background_area includes the
* blank space around the cell, and also the area containing the tree expander;
* so the @background_area rectangles for all cells tile to cover the entire
* @window.
**/
void
gtk_cell_renderer_render (GtkCellRenderer *cell,
cairo_t *cr,
GtkWidget *widget,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
gboolean selected = FALSE;
GtkCellRendererPrivate *priv = cell->priv;
GtkStyleContext *context;
GtkStateFlags state;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
g_return_if_fail (GTK_CELL_RENDERER_GET_CLASS (cell)->render != NULL);
g_return_if_fail (cr != NULL);
selected = (flags & GTK_CELL_RENDERER_SELECTED) == GTK_CELL_RENDERER_SELECTED;
cairo_save (cr);
if (priv->cell_background_set && !selected)
{
gdk_cairo_rectangle (cr, background_area);
gdk_cairo_set_source_rgba (cr, &priv->cell_background);
cairo_fill (cr);
}
gdk_cairo_rectangle (cr, background_area);
cairo_clip (cr);
context = gtk_widget_get_style_context (widget);
gtk_style_context_save (context);
gtk_style_context_add_class (context, GTK_STYLE_CLASS_CELL);
state = gtk_cell_renderer_get_state (cell, widget, flags);
gtk_style_context_set_state (context, state);
GTK_CELL_RENDERER_GET_CLASS (cell)->render (cell,
cr,
widget,
background_area,
cell_area,
flags);
gtk_style_context_restore (context);
cairo_restore (cr);
}
/**
* gtk_cell_renderer_activate:
* @cell: a #GtkCellRenderer
* @event: a #GdkEvent
* @widget: widget that received the event
* @path: widget-dependent string representation of the event location;
* e.g. for #GtkTreeView, a string representation of #GtkTreePath
* @background_area: background area as passed to gtk_cell_renderer_render()
* @cell_area: cell area as passed to gtk_cell_renderer_render()
* @flags: render flags
*
* Passes an activate event to the cell renderer for possible processing.
* Some cell renderers may use events; for example, #GtkCellRendererToggle
* toggles when it gets a mouse click.
*
* Returns: %TRUE if the event was consumed/handled
**/
gboolean
gtk_cell_renderer_activate (GtkCellRenderer *cell,
GdkEvent *event,
GtkWidget *widget,
const gchar *path,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
GtkCellRendererPrivate *priv;
g_return_val_if_fail (GTK_IS_CELL_RENDERER (cell), FALSE);
priv = cell->priv;
if (priv->mode != GTK_CELL_RENDERER_MODE_ACTIVATABLE)
return FALSE;
if (GTK_CELL_RENDERER_GET_CLASS (cell)->activate == NULL)
return FALSE;
return GTK_CELL_RENDERER_GET_CLASS (cell)->activate (cell,
event,
widget,
path,
(GdkRectangle *) background_area,
(GdkRectangle *) cell_area,
flags);
}
/**
* gtk_cell_renderer_start_editing:
* @cell: a #GtkCellRenderer
* @event: (nullable): a #GdkEvent
* @widget: widget that received the event
* @path: widget-dependent string representation of the event location;
* e.g. for #GtkTreeView, a string representation of #GtkTreePath
* @background_area: background area as passed to gtk_cell_renderer_render()
* @cell_area: cell area as passed to gtk_cell_renderer_render()
* @flags: render flags
*
* Passes an activate event to the cell renderer for possible processing.
*
* Returns: (nullable) (transfer none): A new #GtkCellEditable, or %NULL
**/
GtkCellEditable *
gtk_cell_renderer_start_editing (GtkCellRenderer *cell,
GdkEvent *event,
GtkWidget *widget,
const gchar *path,
const GdkRectangle *background_area,
const GdkRectangle *cell_area,
GtkCellRendererState flags)
{
GtkCellRendererPrivate *priv;
GtkCellEditable *editable;
g_return_val_if_fail (GTK_IS_CELL_RENDERER (cell), NULL);
priv = cell->priv;
if (priv->mode != GTK_CELL_RENDERER_MODE_EDITABLE)
return NULL;
if (GTK_CELL_RENDERER_GET_CLASS (cell)->start_editing == NULL)
return NULL;
editable = GTK_CELL_RENDERER_GET_CLASS (cell)->start_editing (cell,
event,
widget,
path,
(GdkRectangle *) background_area,
(GdkRectangle *) cell_area,
flags);
if (editable == NULL)
return NULL;
gtk_style_context_add_class (gtk_widget_get_style_context (GTK_WIDGET (editable)),
GTK_STYLE_CLASS_CELL);
g_signal_emit (cell,
cell_renderer_signals[EDITING_STARTED], 0,
editable, path);
priv->editing = TRUE;
return editable;
}
/**
* gtk_cell_renderer_set_fixed_size:
* @cell: A #GtkCellRenderer
* @width: the width of the cell renderer, or -1
* @height: the height of the cell renderer, or -1
*
* Sets the renderer size to be explicit, independent of the properties set.
**/
void
gtk_cell_renderer_set_fixed_size (GtkCellRenderer *cell,
gint width,
gint height)
{
GtkCellRendererPrivate *priv;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
g_return_if_fail (width >= -1 && height >= -1);
priv = cell->priv;
if ((width != priv->width) || (height != priv->height))
{
g_object_freeze_notify (G_OBJECT (cell));
if (width != priv->width)
{
priv->width = width;
g_object_notify (G_OBJECT (cell), "width");
}
if (height != priv->height)
{
priv->height = height;
g_object_notify (G_OBJECT (cell), "height");
}
g_object_thaw_notify (G_OBJECT (cell));
}
}
/**
* gtk_cell_renderer_get_fixed_size:
* @cell: A #GtkCellRenderer
* @width: (out) (allow-none): location to fill in with the fixed width of the cell, or %NULL
* @height: (out) (allow-none): location to fill in with the fixed height of the cell, or %NULL
*
* Fills in @width and @height with the appropriate size of @cell.
**/
void
gtk_cell_renderer_get_fixed_size (GtkCellRenderer *cell,
gint *width,
gint *height)
{
GtkCellRendererPrivate *priv;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
priv = cell->priv;
if (width)
*width = priv->width;
if (height)
*height = priv->height;
}
/**
* gtk_cell_renderer_set_alignment:
* @cell: A #GtkCellRenderer
* @xalign: the x alignment of the cell renderer
* @yalign: the y alignment of the cell renderer
*
* Sets the renderer’s alignment within its available space.
*
* Since: 2.18
**/
void
gtk_cell_renderer_set_alignment (GtkCellRenderer *cell,
gfloat xalign,
gfloat yalign)
{
GtkCellRendererPrivate *priv;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
g_return_if_fail (xalign >= 0.0 && xalign <= 1.0);
g_return_if_fail (yalign >= 0.0 && yalign <= 1.0);
priv = cell->priv;
if ((xalign != priv->xalign) || (yalign != priv->yalign))
{
g_object_freeze_notify (G_OBJECT (cell));
if (xalign != priv->xalign)
{
priv->xalign = xalign;
g_object_notify (G_OBJECT (cell), "xalign");
}
if (yalign != priv->yalign)
{
priv->yalign = yalign;
g_object_notify (G_OBJECT (cell), "yalign");
}
g_object_thaw_notify (G_OBJECT (cell));
}
}
/**
* gtk_cell_renderer_get_alignment:
* @cell: A #GtkCellRenderer
* @xalign: (out) (allow-none): location to fill in with the x alignment of the cell, or %NULL
* @yalign: (out) (allow-none): location to fill in with the y alignment of the cell, or %NULL
*
* Fills in @xalign and @yalign with the appropriate values of @cell.
*
* Since: 2.18
**/
void
gtk_cell_renderer_get_alignment (GtkCellRenderer *cell,
gfloat *xalign,
gfloat *yalign)
{
GtkCellRendererPrivate *priv;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
priv = cell->priv;
if (xalign)
*xalign = priv->xalign;
if (yalign)
*yalign = priv->yalign;
}
/**
* gtk_cell_renderer_set_padding:
* @cell: A #GtkCellRenderer
* @xpad: the x padding of the cell renderer
* @ypad: the y padding of the cell renderer
*
* Sets the renderer’s padding.
*
* Since: 2.18
**/
void
gtk_cell_renderer_set_padding (GtkCellRenderer *cell,
gint xpad,
gint ypad)
{
GtkCellRendererPrivate *priv;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
g_return_if_fail (xpad >= 0 && ypad >= 0);
priv = cell->priv;
if ((xpad != priv->xpad) || (ypad != priv->ypad))
{
g_object_freeze_notify (G_OBJECT (cell));
if (xpad != priv->xpad)
{
priv->xpad = xpad;
g_object_notify (G_OBJECT (cell), "xpad");
}
if (ypad != priv->ypad)
{
priv->ypad = ypad;
g_object_notify (G_OBJECT (cell), "ypad");
}
g_object_thaw_notify (G_OBJECT (cell));
}
}
/**
* gtk_cell_renderer_get_padding:
* @cell: A #GtkCellRenderer
* @xpad: (out) (allow-none): location to fill in with the x padding of the cell, or %NULL
* @ypad: (out) (allow-none): location to fill in with the y padding of the cell, or %NULL
*
* Fills in @xpad and @ypad with the appropriate values of @cell.
*
* Since: 2.18
**/
void
gtk_cell_renderer_get_padding (GtkCellRenderer *cell,
gint *xpad,
gint *ypad)
{
GtkCellRendererPrivate *priv;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
priv = cell->priv;
if (xpad)
*xpad = priv->xpad;
if (ypad)
*ypad = priv->ypad;
}
/**
* gtk_cell_renderer_set_visible:
* @cell: A #GtkCellRenderer
* @visible: the visibility of the cell
*
* Sets the cell renderer’s visibility.
*
* Since: 2.18
**/
void
gtk_cell_renderer_set_visible (GtkCellRenderer *cell,
gboolean visible)
{
GtkCellRendererPrivate *priv;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
priv = cell->priv;
if (priv->visible != visible)
{
priv->visible = visible ? TRUE : FALSE;
g_object_notify (G_OBJECT (cell), "visible");
}
}
/**
* gtk_cell_renderer_get_visible:
* @cell: A #GtkCellRenderer
*
* Returns the cell renderer’s visibility.
*
* Returns: %TRUE if the cell renderer is visible
*
* Since: 2.18
*/
gboolean
gtk_cell_renderer_get_visible (GtkCellRenderer *cell)
{
g_return_val_if_fail (GTK_IS_CELL_RENDERER (cell), FALSE);
return cell->priv->visible;
}
/**
* gtk_cell_renderer_set_sensitive:
* @cell: A #GtkCellRenderer
* @sensitive: the sensitivity of the cell
*
* Sets the cell renderer’s sensitivity.
*
* Since: 2.18
**/
void
gtk_cell_renderer_set_sensitive (GtkCellRenderer *cell,
gboolean sensitive)
{
GtkCellRendererPrivate *priv;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
priv = cell->priv;
if (priv->sensitive != sensitive)
{
priv->sensitive = sensitive ? TRUE : FALSE;
g_object_notify (G_OBJECT (cell), "sensitive");
}
}
/**
* gtk_cell_renderer_get_sensitive:
* @cell: A #GtkCellRenderer
*
* Returns the cell renderer’s sensitivity.
*
* Returns: %TRUE if the cell renderer is sensitive
*
* Since: 2.18
*/
gboolean
gtk_cell_renderer_get_sensitive (GtkCellRenderer *cell)
{
g_return_val_if_fail (GTK_IS_CELL_RENDERER (cell), FALSE);
return cell->priv->sensitive;
}
/**
* gtk_cell_renderer_is_activatable:
* @cell: A #GtkCellRenderer
*
* Checks whether the cell renderer can do something when activated.
*
* Returns: %TRUE if the cell renderer can do anything when activated
*
* Since: 3.0
*/
gboolean
gtk_cell_renderer_is_activatable (GtkCellRenderer *cell)
{
GtkCellRendererPrivate *priv;
g_return_val_if_fail (GTK_IS_CELL_RENDERER (cell), FALSE);
priv = cell->priv;
return (priv->visible &&
(priv->mode == GTK_CELL_RENDERER_MODE_EDITABLE ||
priv->mode == GTK_CELL_RENDERER_MODE_ACTIVATABLE));
}
/**
* gtk_cell_renderer_stop_editing:
* @cell: A #GtkCellRenderer
* @canceled: %TRUE if the editing has been canceled
*
* Informs the cell renderer that the editing is stopped.
* If @canceled is %TRUE, the cell renderer will emit the
* #GtkCellRenderer::editing-canceled signal.
*
* This function should be called by cell renderer implementations
* in response to the #GtkCellEditable::editing-done signal of
* #GtkCellEditable.
*
* Since: 2.6
**/
void
gtk_cell_renderer_stop_editing (GtkCellRenderer *cell,
gboolean canceled)
{
GtkCellRendererPrivate *priv;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
priv = cell->priv;
if (priv->editing)
{
priv->editing = FALSE;
if (canceled)
g_signal_emit (cell, cell_renderer_signals[EDITING_CANCELED], 0);
}
}
static void
gtk_cell_renderer_real_get_preferred_size (GtkCellRenderer *cell,
GtkWidget *widget,
GtkOrientation orientation,
gint *minimum_size,
gint *natural_size)
{
GtkRequisition min_req;
/* Fallback on the old API to get the size. */
if (GTK_CELL_RENDERER_GET_CLASS (cell)->get_size)
GTK_CELL_RENDERER_GET_CLASS (cell)->get_size (GTK_CELL_RENDERER (cell), widget, NULL, NULL, NULL,
&min_req.width, &min_req.height);
else
{
min_req.width = 0;
min_req.height = 0;
}
if (orientation == GTK_ORIENTATION_HORIZONTAL)
{
if (minimum_size)
*minimum_size = min_req.width;
if (natural_size)
*natural_size = min_req.width;
}
else
{
if (minimum_size)
*minimum_size = min_req.height;
if (natural_size)
*natural_size = min_req.height;
}
}
static GtkSizeRequestMode
gtk_cell_renderer_real_get_request_mode (GtkCellRenderer *cell)
{
/* By default cell renderers are height-for-width. */
return GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH;
}
static void
gtk_cell_renderer_real_get_preferred_width (GtkCellRenderer *cell,
GtkWidget *widget,
gint *minimum_size,
gint *natural_size)
{
gtk_cell_renderer_real_get_preferred_size (cell, widget, GTK_ORIENTATION_HORIZONTAL,
minimum_size, natural_size);
}
static void
gtk_cell_renderer_real_get_preferred_height (GtkCellRenderer *cell,
GtkWidget *widget,
gint *minimum_size,
gint *natural_size)
{
gtk_cell_renderer_real_get_preferred_size (cell, widget, GTK_ORIENTATION_VERTICAL,
minimum_size, natural_size);
}
static void
gtk_cell_renderer_real_get_preferred_height_for_width (GtkCellRenderer *cell,
GtkWidget *widget,
gint width,
gint *minimum_height,
gint *natural_height)
{
/* Fall back on the height reported from ->get_size() */
gtk_cell_renderer_get_preferred_height (cell, widget, minimum_height, natural_height);
}
static void
gtk_cell_renderer_real_get_preferred_width_for_height (GtkCellRenderer *cell,
GtkWidget *widget,
gint height,
gint *minimum_width,
gint *natural_width)
{
/* Fall back on the width reported from ->get_size() */
gtk_cell_renderer_get_preferred_width (cell, widget, minimum_width, natural_width);
}
/* Default implementation assumes that a cell renderer will never use more
* space than its natural size (this is fine for toggles and pixbufs etc
* but needs to be overridden from wrapping/ellipsizing text renderers) */
static void
gtk_cell_renderer_real_get_aligned_area (GtkCellRenderer *cell,
GtkWidget *widget,
GtkCellRendererState flags,
const GdkRectangle *cell_area,
GdkRectangle *aligned_area)
{
gint opposite_size, x_offset, y_offset;
gint natural_size;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (cell_area != NULL);
g_return_if_fail (aligned_area != NULL);
*aligned_area = *cell_area;
/* Trim up the aligned size */
if (gtk_cell_renderer_get_request_mode (cell) == GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH)
{
gtk_cell_renderer_get_preferred_width (cell, widget,
NULL, &natural_size);
aligned_area->width = MIN (aligned_area->width, natural_size);
gtk_cell_renderer_get_preferred_height_for_width (cell, widget,
aligned_area->width,
NULL, &opposite_size);
aligned_area->height = MIN (opposite_size, aligned_area->height);
}
else
{
gtk_cell_renderer_get_preferred_height (cell, widget,
NULL, &natural_size);
aligned_area->height = MIN (aligned_area->width, natural_size);
gtk_cell_renderer_get_preferred_width_for_height (cell, widget,
aligned_area->height,
NULL, &opposite_size);
aligned_area->width = MIN (opposite_size, aligned_area->width);
}
/* offset the cell position */
_gtk_cell_renderer_calc_offset (cell, cell_area,
gtk_widget_get_direction (widget),
aligned_area->width,
aligned_area->height,
&x_offset, &y_offset);
aligned_area->x += x_offset;
aligned_area->y += y_offset;
}
/* An internal convenience function for some containers to peek at the
* cell alignment in a target allocation (used to draw focus and align
* cells in the icon view).
*
* Note this is only a trivial “align * (allocation - request)” operation.
*/
void
_gtk_cell_renderer_calc_offset (GtkCellRenderer *cell,
const GdkRectangle *cell_area,
GtkTextDirection direction,
gint width,
gint height,
gint *x_offset,
gint *y_offset)
{
GtkCellRendererPrivate *priv;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
g_return_if_fail (cell_area != NULL);
g_return_if_fail (x_offset || y_offset);
priv = cell->priv;
if (x_offset)
{
*x_offset = (((direction == GTK_TEXT_DIR_RTL) ?
(1.0 - priv->xalign) : priv->xalign) *
(cell_area->width - width));
*x_offset = MAX (*x_offset, 0);
}
if (y_offset)
{
*y_offset = (priv->yalign *
(cell_area->height - height));
*y_offset = MAX (*y_offset, 0);
}
}
/**
* gtk_cell_renderer_get_request_mode:
* @cell: a #GtkCellRenderer instance
*
* Gets whether the cell renderer prefers a height-for-width layout
* or a width-for-height layout.
*
* Returns: The #GtkSizeRequestMode preferred by this renderer.
*
* Since: 3.0
*/
GtkSizeRequestMode
gtk_cell_renderer_get_request_mode (GtkCellRenderer *cell)
{
g_return_val_if_fail (GTK_IS_CELL_RENDERER (cell), FALSE);
return GTK_CELL_RENDERER_GET_CLASS (cell)->get_request_mode (cell);
}
/**
* gtk_cell_renderer_get_preferred_width:
* @cell: a #GtkCellRenderer instance
* @widget: the #GtkWidget this cell will be rendering to
* @minimum_size: (out) (allow-none): location to store the minimum size, or %NULL
* @natural_size: (out) (allow-none): location to store the natural size, or %NULL
*
* Retreives a renderer’s natural size when rendered to @widget.
*
* Since: 3.0
*/
void
gtk_cell_renderer_get_preferred_width (GtkCellRenderer *cell,
GtkWidget *widget,
gint *minimum_size,
gint *natural_size)
{
GtkCellRendererClass *klass;
gint width;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (NULL != minimum_size || NULL != natural_size);
gtk_cell_renderer_get_fixed_size (GTK_CELL_RENDERER (cell), &width, NULL);
if (width < 0)
{
klass = GTK_CELL_RENDERER_GET_CLASS (cell);
klass->get_preferred_width (cell, widget, minimum_size, natural_size);
}
else
{
if (minimum_size)
*minimum_size = width;
if (natural_size)
*natural_size = width;
}
#if DEBUG_CELL_SIZE_REQUEST
g_message ("%s returning minimum width: %d and natural width: %d",
G_OBJECT_TYPE_NAME (cell),
minimum_size ? *minimum_size : 20000,
natural_size ? *natural_size : 20000);
#endif
}
/**
* gtk_cell_renderer_get_preferred_height:
* @cell: a #GtkCellRenderer instance
* @widget: the #GtkWidget this cell will be rendering to
* @minimum_size: (out) (allow-none): location to store the minimum size, or %NULL
* @natural_size: (out) (allow-none): location to store the natural size, or %NULL
*
* Retreives a renderer’s natural size when rendered to @widget.
*
* Since: 3.0
*/
void
gtk_cell_renderer_get_preferred_height (GtkCellRenderer *cell,
GtkWidget *widget,
gint *minimum_size,
gint *natural_size)
{
GtkCellRendererClass *klass;
gint height;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (NULL != minimum_size || NULL != natural_size);
gtk_cell_renderer_get_fixed_size (GTK_CELL_RENDERER (cell), NULL, &height);
if (height < 0)
{
klass = GTK_CELL_RENDERER_GET_CLASS (cell);
klass->get_preferred_height (cell, widget, minimum_size, natural_size);
}
else
{
if (minimum_size)
*minimum_size = height;
if (natural_size)
*natural_size = height;
}
#if DEBUG_CELL_SIZE_REQUEST
g_message ("%s returning minimum height: %d and natural height: %d",
G_OBJECT_TYPE_NAME (cell),
minimum_size ? *minimum_size : 20000,
natural_size ? *natural_size : 20000);
#endif
}
/**
* gtk_cell_renderer_get_preferred_width_for_height:
* @cell: a #GtkCellRenderer instance
* @widget: the #GtkWidget this cell will be rendering to
* @height: the size which is available for allocation
* @minimum_width: (out) (allow-none): location for storing the minimum size, or %NULL
* @natural_width: (out) (allow-none): location for storing the preferred size, or %NULL
*
* Retreives a cell renderers’s minimum and natural width if it were rendered to
* @widget with the specified @height.
*
* Since: 3.0
*/
void
gtk_cell_renderer_get_preferred_width_for_height (GtkCellRenderer *cell,
GtkWidget *widget,
gint height,
gint *minimum_width,
gint *natural_width)
{
GtkCellRendererClass *klass;
gint width;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (NULL != minimum_width || NULL != natural_width);
gtk_cell_renderer_get_fixed_size (GTK_CELL_RENDERER (cell), &width, NULL);
if (width < 0)
{
klass = GTK_CELL_RENDERER_GET_CLASS (cell);
klass->get_preferred_width_for_height (cell, widget, height, minimum_width, natural_width);
}
else
{
if (minimum_width)
*minimum_width = width;
if (natural_width)
*natural_width = width;
}
#if DEBUG_CELL_SIZE_REQUEST
g_message ("%s width for height: %d is minimum %d and natural: %d",
G_OBJECT_TYPE_NAME (cell), height,
minimum_width ? *minimum_width : 20000,
natural_width ? *natural_width : 20000);
#endif
}
/**
* gtk_cell_renderer_get_preferred_height_for_width:
* @cell: a #GtkCellRenderer instance
* @widget: the #GtkWidget this cell will be rendering to
* @width: the size which is available for allocation
* @minimum_height: (out) (allow-none): location for storing the minimum size, or %NULL
* @natural_height: (out) (allow-none): location for storing the preferred size, or %NULL
*
* Retreives a cell renderers’s minimum and natural height if it were rendered to
* @widget with the specified @width.
*
* Since: 3.0
*/
void
gtk_cell_renderer_get_preferred_height_for_width (GtkCellRenderer *cell,
GtkWidget *widget,
gint width,
gint *minimum_height,
gint *natural_height)
{
GtkCellRendererClass *klass;
gint height;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (NULL != minimum_height || NULL != natural_height);
gtk_cell_renderer_get_fixed_size (GTK_CELL_RENDERER (cell), NULL, &height);
if (height < 0)
{
klass = GTK_CELL_RENDERER_GET_CLASS (cell);
klass->get_preferred_height_for_width (cell, widget, width, minimum_height, natural_height);
}
else
{
if (minimum_height)
*minimum_height = height;
if (natural_height)
*natural_height = height;
}
#if DEBUG_CELL_SIZE_REQUEST
g_message ("%s height for width: %d is minimum %d and natural: %d",
G_OBJECT_TYPE_NAME (cell), width,
minimum_height ? *minimum_height : 20000,
natural_height ? *natural_height : 20000);
#endif
}
/**
* gtk_cell_renderer_get_preferred_size:
* @cell: a #GtkCellRenderer instance
* @widget: the #GtkWidget this cell will be rendering to
* @minimum_size: (out) (allow-none): location for storing the minimum size, or %NULL
* @natural_size: (out) (allow-none): location for storing the natural size, or %NULL
*
* Retrieves the minimum and natural size of a cell taking
* into account the widget’s preference for height-for-width management.
*
* Since: 3.0
*/
void
gtk_cell_renderer_get_preferred_size (GtkCellRenderer *cell,
GtkWidget *widget,
GtkRequisition *minimum_size,
GtkRequisition *natural_size)
{
gint min_width, nat_width;
gint min_height, nat_height;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
if (gtk_cell_renderer_get_request_mode (cell) == GTK_SIZE_REQUEST_HEIGHT_FOR_WIDTH)
{
gtk_cell_renderer_get_preferred_width (cell, widget, &min_width, &nat_width);
if (minimum_size)
{
minimum_size->width = min_width;
gtk_cell_renderer_get_preferred_height_for_width (cell, widget, min_width,
&minimum_size->height, NULL);
}
if (natural_size)
{
natural_size->width = nat_width;
gtk_cell_renderer_get_preferred_height_for_width (cell, widget, nat_width,
NULL, &natural_size->height);
}
}
else /* GTK_SIZE_REQUEST_WIDTH_FOR_HEIGHT */
{
gtk_cell_renderer_get_preferred_height (cell, widget, &min_height, &nat_height);
if (minimum_size)
{
minimum_size->height = min_height;
gtk_cell_renderer_get_preferred_width_for_height (cell, widget, min_height,
&minimum_size->width, NULL);
}
if (natural_size)
{
natural_size->height = nat_height;
gtk_cell_renderer_get_preferred_width_for_height (cell, widget, nat_height,
NULL, &natural_size->width);
}
}
}
/**
* gtk_cell_renderer_get_aligned_area:
* @cell: a #GtkCellRenderer instance
* @widget: the #GtkWidget this cell will be rendering to
* @flags: render flags
* @cell_area: cell area which would be passed to gtk_cell_renderer_render()
* @aligned_area: (out): the return location for the space inside @cell_area
* that would acually be used to render.
*
* Gets the aligned area used by @cell inside @cell_area. Used for finding
* the appropriate edit and focus rectangle.
*
* Since: 3.0
*/
void
gtk_cell_renderer_get_aligned_area (GtkCellRenderer *cell,
GtkWidget *widget,
GtkCellRendererState flags,
const GdkRectangle *cell_area,
GdkRectangle *aligned_area)
{
GtkCellRendererClass *klass;
g_return_if_fail (GTK_IS_CELL_RENDERER (cell));
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (cell_area != NULL);
g_return_if_fail (aligned_area != NULL);
klass = GTK_CELL_RENDERER_GET_CLASS (cell);
klass->get_aligned_area (cell, widget, flags, cell_area, aligned_area);
g_assert (aligned_area->x >= cell_area->x && aligned_area->x <= cell_area->x + cell_area->width);
g_assert (aligned_area->y >= cell_area->y && aligned_area->y <= cell_area->y + cell_area->height);
g_assert ((aligned_area->x - cell_area->x) + aligned_area->width <= cell_area->width);
g_assert ((aligned_area->y - cell_area->y) + aligned_area->height <= cell_area->height);
}
/**
* gtk_cell_renderer_get_state:
* @cell: (nullable): a #GtkCellRenderer, or %NULL
* @widget: (nullable): a #GtkWidget, or %NULL
* @cell_state: cell renderer state
*
* Translates the cell renderer state to #GtkStateFlags,
* based on the cell renderer and widget sensitivity, and
* the given #GtkCellRendererState.
*
* Returns: the widget state flags applying to @cell
*
* Since: 3.0
**/
GtkStateFlags
gtk_cell_renderer_get_state (GtkCellRenderer *cell,
GtkWidget *widget,
GtkCellRendererState cell_state)
{
GtkStateFlags state = 0;
g_return_val_if_fail (!cell || GTK_IS_CELL_RENDERER (cell), 0);
g_return_val_if_fail (!widget || GTK_IS_WIDGET (widget), 0);
if (widget)
state |= gtk_widget_get_state_flags (widget);
state &= ~(GTK_STATE_FLAG_FOCUSED | GTK_STATE_FLAG_PRELIGHT | GTK_STATE_FLAG_SELECTED | GTK_STATE_FLAG_DROP_ACTIVE);
if ((state & GTK_STATE_FLAG_INSENSITIVE) != 0 ||
(cell && !gtk_cell_renderer_get_sensitive (cell)) ||
(cell_state & GTK_CELL_RENDERER_INSENSITIVE) != 0)
{
state |= GTK_STATE_FLAG_INSENSITIVE;
}
else
{
if ((widget && gtk_widget_has_focus (widget)) &&
(cell_state & GTK_CELL_RENDERER_FOCUSED) != 0)
state |= GTK_STATE_FLAG_FOCUSED;
if ((cell_state & GTK_CELL_RENDERER_PRELIT) != 0)
state |= GTK_STATE_FLAG_PRELIGHT;
}
if ((cell_state & GTK_CELL_RENDERER_SELECTED) != 0)
state |= GTK_STATE_FLAG_SELECTED;
return state;
}
/**
* gtk_cell_renderer_class_set_accessible_type:
* @renderer_class: class to set the accessible type for
* @type: The object type that implements the accessible for @widget_class.
* The type must be a subtype of #GtkRendererCellAccessible
*
* Sets the type to be used for creating accessibles for cells rendered by
* cell renderers of @renderer_class. Note that multiple accessibles will
* be created.
*
* This function should only be called from class init functions of cell
* renderers.
**/
void
gtk_cell_renderer_class_set_accessible_type (GtkCellRendererClass *renderer_class,
GType type)
{
GtkCellRendererClassPrivate *priv;
g_return_if_fail (GTK_IS_CELL_RENDERER_CLASS (renderer_class));
g_return_if_fail (g_type_is_a (type, GTK_TYPE_RENDERER_CELL_ACCESSIBLE));
priv = renderer_class->priv;
priv->accessible_type = type;
}
GType
_gtk_cell_renderer_get_accessible_type (GtkCellRenderer *renderer)
{
g_return_val_if_fail (GTK_IS_CELL_RENDERER (renderer), GTK_TYPE_RENDERER_CELL_ACCESSIBLE);
return GTK_CELL_RENDERER_GET_CLASS (renderer)->priv->accessible_type;
}
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