logdiag/liblogdiag/ld-category-view.c

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/*
* ld-category-view.c
*
* This file is a part of logdiag.
* Copyright Přemysl Janouch 2011. All rights reserved.
*
* See the file LICENSE for licensing information.
*
*/
#include "liblogdiag.h"
#include "config.h"
/**
* SECTION:ld-category-view
* @short_description: A category view widget
* @see_also: #LdCategory
*
* #LdCategoryView enables the user to drag symbols from #LdLibrary
* onto #LdDiagramView.
*/
/*
* LdCategoryViewPrivate:
* @category: a category object assigned as a model.
* @expander_prefix: a string to prepend to subcategory labels in expanders.
*/
struct _LdCategoryViewPrivate
{
LdCategory *category;
gchar *expander_prefix;
};
enum
{
PROP_0,
PROP_CATEGORY
};
static void ld_category_view_get_property (GObject *object, guint property_id,
GValue *value, GParamSpec *pspec);
static void ld_category_view_set_property (GObject *object, guint property_id,
const GValue *value, GParamSpec *pspec);
static void ld_category_view_dispose (GObject *gobject);
static void reload_category (LdCategoryView *self);
static void load_category_cb (gpointer data, gpointer user_data);
G_DEFINE_TYPE (LdCategoryView, ld_category_view, GTK_TYPE_VBOX);
static void
ld_category_view_class_init (LdCategoryViewClass *klass)
{
GObjectClass *object_class;
GParamSpec *pspec;
object_class = G_OBJECT_CLASS (klass);
object_class->get_property = ld_category_view_get_property;
object_class->set_property = ld_category_view_set_property;
object_class->dispose = ld_category_view_dispose;
/**
* LdCategoryView:category:
*
* The #LdCategory this widget retrieves content from.
*/
pspec = g_param_spec_object ("category", "Category",
"The symbol category that is shown by this widget.",
2012-10-08 07:08:00 +02:00
LD_TYPE_CATEGORY, G_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_CATEGORY, pspec);
g_type_class_add_private (klass, sizeof (LdCategoryViewPrivate));
}
static void
ld_category_view_init (LdCategoryView *self)
{
self->priv = G_TYPE_INSTANCE_GET_PRIVATE
(self, LD_TYPE_CATEGORY_VIEW, LdCategoryViewPrivate);
}
static void
ld_category_view_dispose (GObject *gobject)
{
LdCategoryView *self;
self = LD_CATEGORY_VIEW (gobject);
ld_category_view_set_category (self, NULL);
g_free (self->priv->expander_prefix);
self->priv->expander_prefix = NULL;
/* Chain up to the parent class. */
G_OBJECT_CLASS (ld_category_view_parent_class)->dispose (gobject);
}
static void
ld_category_view_get_property (GObject *object, guint property_id,
GValue *value, GParamSpec *pspec)
{
LdCategoryView *self;
self = LD_CATEGORY_VIEW (object);
switch (property_id)
{
case PROP_CATEGORY:
g_value_set_object (value, ld_category_view_get_category (self));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ld_category_view_set_property (GObject *object, guint property_id,
const GValue *value, GParamSpec *pspec)
{
LdCategoryView *self;
self = LD_CATEGORY_VIEW (object);
switch (property_id)
{
case PROP_CATEGORY:
ld_category_view_set_category (self,
LD_CATEGORY (g_value_get_object (value)));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
/**
* ld_category_view_new:
*
* Create an instance.
*/
GtkWidget *
ld_category_view_new (void)
{
return g_object_new (LD_TYPE_CATEGORY_VIEW, NULL);
}
/**
* ld_category_view_set_category:
* @self: an #LdCategoryView object.
* @category: (allow-none): the category to be assigned to the widget.
*
* Assign an #LdCategory object to the widget.
*/
void
ld_category_view_set_category (LdCategoryView *self, LdCategory *category)
{
g_return_if_fail (LD_IS_CATEGORY_VIEW (self));
g_return_if_fail (LD_IS_CATEGORY (category) || category == NULL);
if (self->priv->category)
{
g_signal_handlers_disconnect_by_func (self->priv->category,
reload_category, self);
g_object_unref (self->priv->category);
}
self->priv->category = category;
if (category)
{
g_signal_connect_data (category, "children-changed",
G_CALLBACK (reload_category), self,
NULL, G_CONNECT_AFTER | G_CONNECT_SWAPPED);
g_signal_connect_data (category, "notify::parent",
G_CALLBACK (reload_category), self,
NULL, G_CONNECT_AFTER | G_CONNECT_SWAPPED);
g_object_ref (category);
}
reload_category (self);
g_object_notify (G_OBJECT (self), "category");
}
/**
* ld_category_view_get_category:
* @self: an #LdCategoryView object.
*
* Return value: (transfer none): the #LdCategory object
* assigned to the widget.
*/
LdCategory *
ld_category_view_get_category (LdCategoryView *self)
{
g_return_val_if_fail (LD_IS_CATEGORY_VIEW (self), NULL);
return self->priv->category;
}
/**
* ld_category_view_set_expander_prefix:
* @self: an #LdCategoryView object.
* @category: (allow-none): the new prefix.
*
* Set the prefix for inner #GtkExpander labels.
*/
void
ld_category_view_set_expander_prefix (LdCategoryView *self,
const gchar *prefix)
{
g_return_if_fail (LD_IS_CATEGORY_VIEW (self));
g_free (self->priv->expander_prefix);
if (prefix)
self->priv->expander_prefix = g_strdup (prefix);
else
self->priv->expander_prefix = NULL;
reload_category (self);
}
/**
* ld_category_view_get_expander_prefix:
* @self: an #LdCategoryView object.
*
* Return value: the prefix for inner expander labels.
*/
const gchar *
ld_category_view_get_expander_prefix (LdCategoryView *self)
{
g_return_val_if_fail (LD_IS_CATEGORY_VIEW (self), NULL);
return self->priv->expander_prefix;
}
static GtkWidget *
create_empty_label (void)
{
GtkWidget *label;
PangoAttrList *attr;
label = gtk_label_new (_("Empty"));
gtk_widget_set_sensitive (label, FALSE);
gtk_misc_set_alignment (GTK_MISC (label), 0, 0.5);
gtk_misc_set_padding (GTK_MISC (label), 5, 0);
attr = pango_attr_list_new ();
pango_attr_list_change (attr, pango_attr_style_new (PANGO_STYLE_ITALIC));
gtk_label_set_attributes (GTK_LABEL (label), attr);
pango_attr_list_unref (attr);
return label;
}
static void
reload_category (LdCategoryView *self)
{
g_return_if_fail (LD_IS_CATEGORY_VIEW (self));
/* Clear the toolbar first, if there was already something in it. */
gtk_container_foreach (GTK_CONTAINER (self),
(GtkCallback) gtk_widget_destroy, NULL);
if (self->priv->category)
{
GSList *children;
/* TODO: Also show the symbols. */
children = (GSList *) ld_category_get_children (self->priv->category);
if (children)
g_slist_foreach (children, load_category_cb, self);
else
/* TODO: Don't show this if there are any symbols. */
gtk_box_pack_start (GTK_BOX (self),
create_empty_label (), FALSE, FALSE, 0);
}
}
static void
load_category_cb (gpointer data, gpointer user_data)
{
LdCategoryView *self;
LdCategory *cat;
GtkWidget *expander, *child;
const gchar *name;
gchar *label, *label_markup;
g_return_if_fail (LD_IS_CATEGORY_VIEW (user_data));
g_return_if_fail (LD_IS_CATEGORY (data));
self = user_data;
cat = data;
name = ld_category_get_human_name (cat);
if (self->priv->expander_prefix)
{
/* It's the least I can do to make it not look bad right now. */
gchar *prefix_escaped, *name_escaped;
prefix_escaped = g_markup_escape_text (self->priv->expander_prefix, -1);
name_escaped = g_markup_escape_text (name, -1);
label = g_strdup_printf ("%s: %s", self->priv->expander_prefix, name);
label_markup = g_strdup_printf ("<small>%s:</small> %s",
prefix_escaped, name_escaped);
g_free (name_escaped);
g_free (prefix_escaped);
}
else
{
label = g_strdup (name);
label_markup = g_markup_escape_text (name, -1);
}
expander = gtk_expander_new (label_markup);
gtk_expander_set_expanded (GTK_EXPANDER (expander), TRUE);
gtk_expander_set_use_markup (GTK_EXPANDER (expander), TRUE);
child = ld_category_view_new ();
ld_category_view_set_expander_prefix (LD_CATEGORY_VIEW (child), label);
ld_category_view_set_category (LD_CATEGORY_VIEW (child), cat);
gtk_container_add (GTK_CONTAINER (expander), child);
gtk_box_pack_start (GTK_BOX (self), expander, FALSE, FALSE, 0);
g_free (label);
g_free (label_markup);
}