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gtk2/gtk/gtknumerableicon.c

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/*
* gtknumerableicon.c: an emblemed icon with number emblems
*
* Copyright (C) 2010 Red Hat, Inc.
*
* 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/>.
*
* Authors: Cosimo Cecchi <cosimoc@redhat.com>
*/
/**
* SECTION:gtknumerableicon
* @Title: GtkNumerableIcon
* @Short_description: A GIcon that allows numbered emblems
*
* GtkNumerableIcon is a subclass of #GEmblemedIcon that can
* show a number or short string as an emblem. The number can
* be overlayed on top of another emblem, if desired.
*
* It supports theming by taking font and color information
* from a provided #GtkStyleContext; see
* gtk_numerable_icon_set_style_context().
*
* <example>
* <title>Typical numerable icons</title>
* <inlinegraphic fileref="numerableicon.png" format="PNG"/>
* <inlinegraphic fileref="numerableicon2.png" format="PNG"/>
* </example>
*/
#include <config.h>
#include "gtknumerableicon.h"
#include "gtknumerableiconprivate.h"
#include "gtkicontheme.h"
#include "gtkintl.h"
#include "gtkwidget.h"
#include "gtkwidgetpath.h"
#include "gtkwindow.h"
#include <gdk/gdk.h>
#include <pango/pango.h>
#include <math.h>
struct _GtkNumerableIconPrivate {
gint count;
gint icon_size;
gchar *label;
GIcon *background_icon;
gchar *background_icon_name;
GdkRGBA *background;
GdkRGBA *foreground;
PangoFontDescription *font;
cairo_pattern_t *background_image;
gint border_size;
GtkStyleContext *style;
gulong style_changed_id;
gchar *rendered_string;
};
enum {
PROP_COUNT = 1,
PROP_LABEL,
PROP_STYLE,
PROP_BACKGROUND_ICON,
PROP_BACKGROUND_ICON_NAME,
NUM_PROPERTIES
};
#define DEFAULT_SURFACE_SIZE 256
#define DEFAULT_BORDER_SIZE DEFAULT_SURFACE_SIZE * 0.06
#define DEFAULT_RADIUS DEFAULT_SURFACE_SIZE / 2
#define DEFAULT_BACKGROUND "#000000"
#define DEFAULT_FOREGROUND "#ffffff"
static GParamSpec *properties[NUM_PROPERTIES] = { NULL, };
G_DEFINE_TYPE_WITH_PRIVATE (GtkNumerableIcon, gtk_numerable_icon, G_TYPE_EMBLEMED_ICON)
static gint
get_surface_size (cairo_surface_t *surface)
{
return MAX (cairo_image_surface_get_width (surface), cairo_image_surface_get_height (surface));
}
static gdouble
get_border_size (GtkNumerableIcon *self)
{
return self->priv->border_size;
}
static cairo_surface_t *
draw_default_surface (GtkNumerableIcon *self)
{
cairo_surface_t *surface;
cairo_t *cr;
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
DEFAULT_SURFACE_SIZE, DEFAULT_SURFACE_SIZE);
cr = cairo_create (surface);
cairo_arc (cr, DEFAULT_SURFACE_SIZE / 2., DEFAULT_SURFACE_SIZE / 2.,
DEFAULT_RADIUS, 0., 2 * G_PI);
gdk_cairo_set_source_rgba (cr, self->priv->background);
cairo_fill (cr);
cairo_arc (cr, DEFAULT_SURFACE_SIZE / 2., DEFAULT_SURFACE_SIZE / 2.,
DEFAULT_RADIUS - DEFAULT_BORDER_SIZE, 0., 2 * G_PI);
gdk_cairo_set_source_rgba (cr, self->priv->foreground);
cairo_fill (cr);
cairo_arc (cr, DEFAULT_SURFACE_SIZE / 2., DEFAULT_SURFACE_SIZE / 2.,
DEFAULT_RADIUS - 2 * DEFAULT_BORDER_SIZE, 0., 2 * G_PI);
gdk_cairo_set_source_rgba (cr, self->priv->background);
cairo_fill (cr);
cairo_destroy (cr);
return surface;
}
static cairo_surface_t *
draw_from_gradient (cairo_pattern_t *pattern)
{
cairo_surface_t *surface;
cairo_matrix_t matrix;
cairo_t *cr;
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
DEFAULT_SURFACE_SIZE, DEFAULT_SURFACE_SIZE);
cr = cairo_create (surface);
/* scale the gradient points to the user space coordinates */
cairo_matrix_init_scale (&matrix,
1. / (double) DEFAULT_SURFACE_SIZE,
1. / (double) DEFAULT_SURFACE_SIZE);
cairo_pattern_set_matrix (pattern, &matrix);
cairo_arc (cr, DEFAULT_SURFACE_SIZE / 2., DEFAULT_SURFACE_SIZE / 2.,
DEFAULT_RADIUS, 0., 2 * G_PI);
cairo_set_source (cr, pattern);
cairo_fill (cr);
cairo_destroy (cr);
return surface;
}
/* copy the surface */
static cairo_surface_t *
draw_from_image (cairo_surface_t *image)
{
cairo_surface_t *surface;
cairo_t *cr;
surface = cairo_surface_create_similar (image, CAIRO_CONTENT_COLOR_ALPHA,
cairo_image_surface_get_width (image),
cairo_image_surface_get_height (image));
cr = cairo_create (surface);
cairo_set_source_surface (cr, image, 0, 0);
cairo_paint (cr);
cairo_destroy (cr);
return surface;
}
static cairo_surface_t *
draw_from_gicon (GtkNumerableIcon *self)
{
GtkIconTheme *theme;
GdkScreen *screen;
GtkIconInfo *info;
GdkPixbuf *pixbuf;
cairo_surface_t *surface;
if (self->priv->style != NULL)
{
screen = gtk_style_context_get_screen (self->priv->style);
theme = gtk_icon_theme_get_for_screen (screen);
}
else
{
theme = gtk_icon_theme_get_default ();
}
info = gtk_icon_theme_lookup_by_gicon (theme, self->priv->background_icon,
self->priv->icon_size,
GTK_ICON_LOOKUP_GENERIC_FALLBACK);
if (info == NULL)
return NULL;
pixbuf = gtk_icon_info_load_icon (info, NULL);
g_object_unref (info);
if (pixbuf == NULL)
return NULL;
surface = gdk_cairo_surface_create_from_pixbuf (pixbuf, 1, NULL);
g_object_unref (pixbuf);
return surface;
}
static cairo_surface_t *
get_image_surface (GtkNumerableIcon *self)
{
cairo_surface_t *retval = NULL, *image;
if (self->priv->background_icon != NULL)
{
retval = draw_from_gicon (self);
self->priv->border_size = 0;
}
else if (self->priv->background_image != NULL)
{
if (cairo_pattern_get_surface (self->priv->background_image, &image) == CAIRO_STATUS_SUCCESS)
retval = draw_from_image (image);
else
retval = draw_from_gradient (self->priv->background_image);
self->priv->border_size = 0;
}
if (retval == NULL)
{
retval = draw_default_surface (self);
self->priv->border_size = DEFAULT_BORDER_SIZE;
}
return retval;
}
static PangoLayout *
get_pango_layout (GtkNumerableIcon *self)
{
PangoContext *context;
GdkScreen *screen;
PangoLayout *layout;
if (self->priv->style != NULL)
{
screen = gtk_style_context_get_screen (self->priv->style);
context = gdk_pango_context_get_for_screen (screen);
layout = pango_layout_new (context);
if (self->priv->font != NULL)
pango_layout_set_font_description (layout, self->priv->font);
pango_layout_set_text (layout, self->priv->rendered_string, -1);
g_object_unref (context);
}
else
{
GtkWidget *fake;
/* steal gtk text settings from the window */
fake = gtk_window_new (GTK_WINDOW_TOPLEVEL);
layout = gtk_widget_create_pango_layout (fake, self->priv->rendered_string);
gtk_widget_destroy (fake);
}
return layout;
}
static void
gtk_numerable_icon_ensure_emblem (GtkNumerableIcon *self)
{
cairo_t *cr;
cairo_surface_t *surface;
PangoLayout *layout;
GEmblem *emblem;
gint width, height;
gdouble scale;
PangoAttrList *attr_list;
PangoAttribute *attr;
GdkPixbuf *pixbuf;
/* don't draw anything if the count is zero */
if (self->priv->rendered_string == NULL)
{
g_emblemed_icon_clear_emblems (G_EMBLEMED_ICON (self));
return;
}
surface = get_image_surface (self);
cr = cairo_create (surface);
layout = get_pango_layout (self);
pango_layout_get_pixel_size (layout, &width, &height);
/* scale the layout to be 0.75 of the size still available for drawing */
scale = ((get_surface_size (surface) - 2 * get_border_size (self)) * 0.75) / (MAX (height, width));
attr_list = pango_attr_list_new ();
attr = pango_attr_scale_new (scale);
pango_attr_list_insert (attr_list, attr);
attr = pango_attr_weight_new (PANGO_WEIGHT_BOLD);
pango_attr_list_insert (attr_list, attr);
pango_layout_set_attributes (layout, attr_list);
/* update these values */
pango_layout_get_pixel_size (layout, &width, &height);
/* move to the center */
cairo_move_to (cr,
get_surface_size (surface) / 2. - (gdouble) width / 2.,
get_surface_size (surface) / 2. - (gdouble) height / 2.);
gdk_cairo_set_source_rgba (cr, self->priv->foreground);
pango_cairo_show_layout (cr, layout);
cairo_destroy (cr);
pixbuf =
gdk_pixbuf_get_from_surface (surface, 0, 0,
get_surface_size (surface), get_surface_size (surface));
emblem = g_emblem_new (G_ICON (pixbuf));
g_emblemed_icon_clear_emblems (G_EMBLEMED_ICON (self));
g_emblemed_icon_add_emblem (G_EMBLEMED_ICON (self), emblem);
g_object_unref (layout);
g_object_unref (emblem);
g_object_unref (pixbuf);
cairo_surface_destroy (surface);
pango_attr_list_unref (attr_list);
}
static void
gtk_numerable_icon_update_properties_from_style (GtkNumerableIcon *self)
{
GtkStyleContext *style = self->priv->style;
GtkWidgetPath *path, *saved;
cairo_pattern_t *pattern = NULL;
GdkRGBA background, foreground;
PangoFontDescription *font = NULL;
/* save an unmodified copy of the original widget path, in order
* to restore it later */
path = gtk_widget_path_copy (gtk_style_context_get_path (style));
saved = gtk_widget_path_copy (path);
if (!gtk_widget_path_is_type (path, GTK_TYPE_NUMERABLE_ICON))
{
/* append our GType to the style context to fetch appropriate colors */
gtk_widget_path_append_type (path, GTK_TYPE_NUMERABLE_ICON);
gtk_style_context_set_path (style, path);
}
gtk_style_context_get_background_color (style, gtk_style_context_get_state (style),
&background);
gtk_style_context_get_color (style, gtk_style_context_get_state (style),
&foreground);
if (self->priv->background != NULL)
gdk_rgba_free (self->priv->background);
self->priv->background = gdk_rgba_copy (&background);
if (self->priv->foreground != NULL)
gdk_rgba_free (self->priv->foreground);
self->priv->foreground = gdk_rgba_copy (&foreground);
gtk_style_context_get (style, gtk_style_context_get_state (style),
GTK_STYLE_PROPERTY_BACKGROUND_IMAGE, &pattern,
NULL);
if (pattern != NULL)
{
if (self->priv->background_image != NULL)
cairo_pattern_destroy (self->priv->background_image);
self->priv->background_image = pattern;
}
gtk_style_context_get (style, gtk_style_context_get_state (style),
GTK_STYLE_PROPERTY_FONT, &font,
NULL);
if (font != NULL)
{
if (self->priv->font != NULL)
pango_font_description_free (self->priv->font);
self->priv->font = font;
}
gtk_numerable_icon_ensure_emblem (self);
/* restore original widget path */
gtk_style_context_set_path (style, saved);
gtk_widget_path_free (path);
gtk_widget_path_free (saved);
}
static void
gtk_numerable_icon_init_style (GtkNumerableIcon *self)
{
GtkStyleContext *style = self->priv->style;
if (style == NULL)
return;
gtk_numerable_icon_update_properties_from_style (self);
self->priv->style_changed_id =
g_signal_connect_swapped (style, "changed",
G_CALLBACK (gtk_numerable_icon_update_properties_from_style), self);
}
static void
gtk_numerable_icon_ensure_and_replace_label (GtkNumerableIcon *self,
gint count,
const gchar *label)
{
g_assert (!(label != NULL && count != 0));
g_free (self->priv->rendered_string);
self->priv->rendered_string = NULL;
if (count != 0)
{
if (self->priv->label != NULL)
{
g_free (self->priv->label);
self->priv->label = NULL;
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_LABEL]);
}
if (count > 99)
count = 99;
if (count < -99)
count = -99;
self->priv->count = count;
/* Translators: the format here is used to build the string that will be rendered
* in the number emblem.
*/
self->priv->rendered_string = g_strdup_printf (C_("Number format", "%d"), count);
return;
}
if (label != NULL)
{
if (self->priv->count != 0)
{
self->priv->count = 0;
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_COUNT]);
}
g_free (self->priv->label);
if (g_strcmp0 (label, "") == 0)
{
self->priv->label = NULL;
return;
}
self->priv->label = g_strdup (label);
self->priv->rendered_string = g_strdup (label);
}
}
static gboolean
real_set_background_icon (GtkNumerableIcon *self,
GIcon *icon)
{
if (!g_icon_equal (self->priv->background_icon, icon))
{
g_clear_object (&self->priv->background_icon);
if (icon != NULL)
self->priv->background_icon = g_object_ref (icon);
gtk_numerable_icon_ensure_emblem (self);
return TRUE;
}
return FALSE;
}
static void
gtk_numerable_icon_constructed (GObject *object)
{
GtkNumerableIcon *self = GTK_NUMERABLE_ICON (object);
if (G_OBJECT_CLASS (gtk_numerable_icon_parent_class)->constructed != NULL)
G_OBJECT_CLASS (gtk_numerable_icon_parent_class)->constructed (object);
gtk_numerable_icon_ensure_emblem (self);
}
static void
gtk_numerable_icon_finalize (GObject *object)
{
GtkNumerableIcon *self = GTK_NUMERABLE_ICON (object);
g_free (self->priv->label);
g_free (self->priv->rendered_string);
gdk_rgba_free (self->priv->background);
gdk_rgba_free (self->priv->foreground);
pango_font_description_free (self->priv->font);
cairo_pattern_destroy (self->priv->background_image);
G_OBJECT_CLASS (gtk_numerable_icon_parent_class)->finalize (object);
}
static void
gtk_numerable_icon_dispose (GObject *object)
{
GtkNumerableIcon *self = GTK_NUMERABLE_ICON (object);
if (self->priv->style_changed_id != 0)
{
g_signal_handler_disconnect (self->priv->style,
self->priv->style_changed_id);
self->priv->style_changed_id = 0;
}
g_clear_object (&self->priv->style);
g_clear_object (&self->priv->background_icon);
G_OBJECT_CLASS (gtk_numerable_icon_parent_class)->dispose (object);
}
static void
gtk_numerable_icon_set_property (GObject *object,
guint property_id,
const GValue *value,
GParamSpec *pspec)
{
GtkNumerableIcon *self = GTK_NUMERABLE_ICON (object);
switch (property_id)
{
case PROP_COUNT:
gtk_numerable_icon_set_count (self, g_value_get_int (value));
break;
case PROP_LABEL:
gtk_numerable_icon_set_label (self, g_value_get_string (value));
break;
case PROP_STYLE:
gtk_numerable_icon_set_style_context (self, g_value_get_object (value));
break;
case PROP_BACKGROUND_ICON:
gtk_numerable_icon_set_background_gicon (self, g_value_get_object (value));
break;
case PROP_BACKGROUND_ICON_NAME:
gtk_numerable_icon_set_background_icon_name (self, g_value_get_string (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_numerable_icon_get_property (GObject *object,
guint property_id,
GValue *value,
GParamSpec *pspec)
{
GtkNumerableIcon *self = GTK_NUMERABLE_ICON (object);
switch (property_id)
{
case PROP_COUNT:
g_value_set_int (value, self->priv->count);
break;
case PROP_LABEL:
g_value_set_string (value, self->priv->label);
break;
case PROP_STYLE:
g_value_set_object (value, self->priv->style);
break;
case PROP_BACKGROUND_ICON:
if (self->priv->background_icon != NULL)
g_value_set_object (value, self->priv->background_icon);
break;
case PROP_BACKGROUND_ICON_NAME:
g_value_set_string (value, self->priv->background_icon_name);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static void
gtk_numerable_icon_class_init (GtkNumerableIconClass *klass)
{
GObjectClass *oclass = G_OBJECT_CLASS (klass);
oclass->get_property = gtk_numerable_icon_get_property;
oclass->set_property = gtk_numerable_icon_set_property;
oclass->constructed = gtk_numerable_icon_constructed;
oclass->dispose = gtk_numerable_icon_dispose;
oclass->finalize = gtk_numerable_icon_finalize;
properties[PROP_COUNT] =
g_param_spec_int ("count",
P_("Icon's count"),
P_("The count of the emblem currently displayed"),
-99, 99, 0,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
properties[PROP_LABEL] =
g_param_spec_string ("label",
P_("Icon's label"),
P_("The label to be displayed over the icon"),
NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
properties[PROP_STYLE] =
g_param_spec_object ("style-context",
P_("Icon's style context"),
P_("The style context to theme the icon appearance"),
GTK_TYPE_STYLE_CONTEXT,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
properties[PROP_BACKGROUND_ICON] =
g_param_spec_object ("background-icon",
P_("Background icon"),
P_("The icon for the number emblem background"),
G_TYPE_ICON,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
properties[PROP_BACKGROUND_ICON_NAME] =
g_param_spec_string ("background-icon-name",
P_("Background icon name"),
P_("The icon name for the number emblem background"),
NULL,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS);
g_object_class_install_properties (oclass, NUM_PROPERTIES, properties);
}
static void
gtk_numerable_icon_init (GtkNumerableIcon *self)
{
GdkRGBA bg;
GdkRGBA fg;
self->priv = gtk_numerable_icon_get_instance_private (self);
gdk_rgba_parse (&bg, DEFAULT_BACKGROUND);
gdk_rgba_parse (&fg, DEFAULT_FOREGROUND);
self->priv->background = gdk_rgba_copy (&bg);
self->priv->foreground = gdk_rgba_copy (&fg);
self->priv->icon_size = 48;
}
/* private */
void
_gtk_numerable_icon_set_background_icon_size (GtkNumerableIcon *self,
gint icon_size)
{
if (self->priv->background_icon == NULL)
return;
if (self->priv->icon_size != icon_size)
{
self->priv->icon_size = icon_size;
gtk_numerable_icon_ensure_emblem (self);
}
}
/**
* gtk_numerable_icon_get_label:
* @self: a #GtkNumerableIcon
*
* Returns the currently displayed label of the icon, or %NULL.
*
* Returns: the currently displayed label
*
* Since: 3.0
*/
const gchar *
gtk_numerable_icon_get_label (GtkNumerableIcon *self)
{
g_return_val_if_fail (GTK_IS_NUMERABLE_ICON (self), NULL);
return self->priv->label;
}
/**
* gtk_numerable_icon_set_label:
* @self: a #GtkNumerableIcon
* @label: (allow-none): a short label, or %NULL
*
* Sets the currently displayed value of @self to the string
* in @label. Setting an empty label removes the emblem.
*
* Note that this is meant for displaying short labels, such as
* roman numbers, or single letters. For roman numbers, consider
* using the Unicode characters U+2160 - U+217F. Strings longer
* than two characters will likely not be rendered very well.
*
* If this method is called, and a number was already set on the
* icon, it will automatically be reset to zero before rendering
* the label, i.e. the last method called between
* gtk_numerable_icon_set_label() and gtk_numerable_icon_set_count()
* has always priority.
*
* Since: 3.0
*/
void
gtk_numerable_icon_set_label (GtkNumerableIcon *self,
const gchar *label)
{
g_return_if_fail (GTK_IS_NUMERABLE_ICON (self));
if (g_strcmp0 (label, self->priv->label) != 0)
{
gtk_numerable_icon_ensure_and_replace_label (self, 0, label);
gtk_numerable_icon_ensure_emblem (self);
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_LABEL]);
}
}
/**
* gtk_numerable_icon_get_count:
* @self: a #GtkNumerableIcon
*
* Returns the value currently displayed by @self.
*
* Returns: the currently displayed value
*
* Since: 3.0
*/
gint
gtk_numerable_icon_get_count (GtkNumerableIcon *self)
{
g_return_val_if_fail (GTK_IS_NUMERABLE_ICON (self), 0);
return self->priv->count;
}
/**
* gtk_numerable_icon_set_count:
* @self: a #GtkNumerableIcon
* @count: a number between -99 and 99
*
* Sets the currently displayed value of @self to @count.
*
* The numeric value is always clamped to make it two digits, i.e.
* between -99 and 99. Setting a count of zero removes the emblem.
* If this method is called, and a label was already set on the icon,
* it will automatically be reset to %NULL before rendering the number,
* i.e. the last method called between gtk_numerable_icon_set_count()
* and gtk_numerable_icon_set_label() has always priority.
*
* Since: 3.0
*/
void
gtk_numerable_icon_set_count (GtkNumerableIcon *self,
gint count)
{
g_return_if_fail (GTK_IS_NUMERABLE_ICON (self));
if (count != self->priv->count)
{
gtk_numerable_icon_ensure_and_replace_label (self, count, NULL);
gtk_numerable_icon_ensure_emblem (self);
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_COUNT]);
}
}
/**
* gtk_numerable_icon_get_style_context:
* @self: a #GtkNumerableIcon
*
* Returns the #GtkStyleContext used by the icon for theming,
* or %NULL if there's none.
*
* Returns: (transfer none): a #GtkStyleContext, or %NULL.
* This object is internal to GTK+ and should not be unreffed.
* Use g_object_ref() if you want to keep it around
*
* Since: 3.0
*/
GtkStyleContext *
gtk_numerable_icon_get_style_context (GtkNumerableIcon *self)
{
g_return_val_if_fail (GTK_IS_NUMERABLE_ICON (self), NULL);
return self->priv->style;
}
/**
* gtk_numerable_icon_set_style_context:
* @self: a #GtkNumerableIcon
* @style: a #GtkStyleContext
*
* Updates the icon to fetch theme information from the
* given #GtkStyleContext.
*
* Since: 3.0
*/
void
gtk_numerable_icon_set_style_context (GtkNumerableIcon *self,
GtkStyleContext *style)
{
g_return_if_fail (GTK_IS_NUMERABLE_ICON (self));
g_return_if_fail (GTK_IS_STYLE_CONTEXT (style));
if (style != self->priv->style)
{
if (self->priv->style_changed_id != 0)
g_signal_handler_disconnect (self->priv->style,
self->priv->style_changed_id);
if (self->priv->style != NULL)
g_object_unref (self->priv->style);
self->priv->style = g_object_ref (style);
gtk_numerable_icon_init_style (self);
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_STYLE]);
}
}
/**
* gtk_numerable_icon_set_background_gicon:
* @self: a #GtkNumerableIcon
* @icon: (allow-none): a #GIcon, or %NULL
*
* Updates the icon to use @icon as the base background image.
* If @icon is %NULL, @self will go back using style information
* or default theming for its background image.
*
* If this method is called and an icon name was already set as
* background for the icon, @icon will be used, i.e. the last method
* called between gtk_numerable_icon_set_background_gicon() and
* gtk_numerable_icon_set_background_icon_name() has always priority.
*
* Since: 3.0
*/
void
gtk_numerable_icon_set_background_gicon (GtkNumerableIcon *self,
GIcon *icon)
{
gboolean res;
g_return_if_fail (GTK_IS_NUMERABLE_ICON (self));
if (self->priv->background_icon_name != NULL)
{
g_free (self->priv->background_icon_name);
self->priv->background_icon_name = NULL;
}
res = real_set_background_icon (self, icon);
if (res)
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_BACKGROUND_ICON]);
}
/**
* gtk_numerable_icon_get_background_gicon:
* @self: a #GtkNumerableIcon
*
* Returns the #GIcon that was set as the base background image, or
* %NULL if there's none. The caller of this function does not own
* a reference to the returned #GIcon.
*
* Returns: (transfer none): a #GIcon, or %NULL
*
* Since: 3.0
*/
GIcon *
gtk_numerable_icon_get_background_gicon (GtkNumerableIcon *self)
{
GIcon *retval = NULL;
g_return_val_if_fail (GTK_IS_NUMERABLE_ICON (self), NULL);
/* return the GIcon only if it wasn't created from an icon name */
if (self->priv->background_icon_name == NULL)
retval = self->priv->background_icon;
return retval;
}
/**
* gtk_numerable_icon_set_background_icon_name:
* @self: a #GtkNumerableIcon
* @icon_name: (allow-none): an icon name, or %NULL
*
* Updates the icon to use the icon named @icon_name from the
* current icon theme as the base background image. If @icon_name
* is %NULL, @self will go back using style information or default
* theming for its background image.
*
* If this method is called and a #GIcon was already set as
* background for the icon, @icon_name will be used, i.e. the
* last method called between gtk_numerable_icon_set_background_icon_name()
* and gtk_numerable_icon_set_background_gicon() has always priority.
*
* Since: 3.0
*/
void
gtk_numerable_icon_set_background_icon_name (GtkNumerableIcon *self,
const gchar *icon_name)
{
GIcon *icon = NULL;
gboolean res;
g_return_if_fail (GTK_IS_NUMERABLE_ICON (self));
if (g_strcmp0 (icon_name, self->priv->background_icon_name) != 0)
{
g_free (self->priv->background_icon_name);
self->priv->background_icon_name = g_strdup (icon_name);
}
if (icon_name != NULL)
icon = g_themed_icon_new_with_default_fallbacks (icon_name);
res = real_set_background_icon (self, icon);
if (res)
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_BACKGROUND_ICON_NAME]);
if (icon != NULL)
g_object_unref (icon);
}
/**
* gtk_numerable_icon_get_background_icon_name:
* @self: a #GtkNumerableIcon
*
* Returns the icon name used as the base background image,
* or %NULL if there's none.
*
* Returns: an icon name, or %NULL
*
* Since: 3.0
*/
const gchar *
gtk_numerable_icon_get_background_icon_name (GtkNumerableIcon *self)
{
g_return_val_if_fail (GTK_IS_NUMERABLE_ICON (self), NULL);
return self->priv->background_icon_name;
}
/**
* gtk_numerable_icon_new:
* @base_icon: a #GIcon to overlay on
*
* Creates a new unthemed #GtkNumerableIcon.
*
* Returns: (transfer full): a new #GIcon
*
* Since: 3.0
*/
GIcon *
gtk_numerable_icon_new (GIcon *base_icon)
{
g_return_val_if_fail (G_IS_ICON (base_icon), NULL);
return g_object_new (GTK_TYPE_NUMERABLE_ICON,
"gicon", base_icon,
NULL);
}
/**
* gtk_numerable_icon_new_with_style_context:
* @base_icon: a #GIcon to overlay on
* @context: a #GtkStyleContext
*
* Creates a new #GtkNumerableIcon which will themed according
* to the passed #GtkStyleContext. This is a convenience constructor
* that calls gtk_numerable_icon_set_style_context() internally.
*
* Returns: (transfer full): a new #GIcon
*
* Since: 3.0
*/
GIcon *
gtk_numerable_icon_new_with_style_context (GIcon *base_icon,
GtkStyleContext *context)
{
g_return_val_if_fail (G_IS_ICON (base_icon), NULL);
return g_object_new (GTK_TYPE_NUMERABLE_ICON,
"gicon", base_icon,
"style-context", context,
NULL);
}
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