logdiag/liblogdiag/ld-category-tree-view.c

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/*
* ld-category-tree-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-tree-view
* @short_description: A category tree view widget
* @see_also: #LdCategory
*
* #LdCategoryTreeView enables the user to drag symbols from #LdLibrary
* onto #LdDiagramView.
*/
/*
* LdCategoryTreeViewPrivate:
* @category: a category object assigned as a model.
* @expander_prefix: a string to prepend to subcategory labels in expanders.
*/
struct _LdCategoryTreeViewPrivate
{
LdCategory *category;
gchar *expander_prefix;
};
enum
{
PROP_0,
PROP_CATEGORY
};
static void ld_category_tree_view_get_property (GObject *object,
guint property_id, GValue *value, GParamSpec *pspec);
static void ld_category_tree_view_set_property (GObject *object,
guint property_id, const GValue *value, GParamSpec *pspec);
static void ld_category_tree_view_dispose (GObject *gobject);
static void ld_category_tree_view_set_category (LdCategoryView *iface,
LdCategory *category);
static LdCategory *ld_category_tree_view_get_category (LdCategoryView *iface);
static void
ld_category_view_init (LdCategoryViewInterface *iface)
{
iface->set_category = ld_category_tree_view_set_category;
iface->get_category = ld_category_tree_view_get_category;
}
G_DEFINE_TYPE_WITH_CODE (LdCategoryTreeView,
ld_category_tree_view, GTK_TYPE_VBOX,
G_IMPLEMENT_INTERFACE (LD_TYPE_CATEGORY_VIEW, ld_category_view_init));
static void
ld_category_tree_view_class_init (LdCategoryTreeViewClass *klass)
{
GObjectClass *object_class;
object_class = G_OBJECT_CLASS (klass);
object_class->get_property = ld_category_tree_view_get_property;
object_class->set_property = ld_category_tree_view_set_property;
object_class->dispose = ld_category_tree_view_dispose;
g_object_class_override_property (object_class, PROP_CATEGORY, "category");
g_type_class_add_private (klass, sizeof (LdCategoryTreeViewPrivate));
}
static void
ld_category_tree_view_init (LdCategoryTreeView *self)
{
self->priv = G_TYPE_INSTANCE_GET_PRIVATE
(self, LD_TYPE_CATEGORY_TREE_VIEW, LdCategoryTreeViewPrivate);
}
static void
ld_category_tree_view_dispose (GObject *gobject)
{
LdCategoryTreeView *self;
self = LD_CATEGORY_TREE_VIEW (gobject);
ld_category_view_set_category (LD_CATEGORY_VIEW (self), NULL);
g_free (self->priv->expander_prefix);
self->priv->expander_prefix = NULL;
/* Chain up to the parent class. */
G_OBJECT_CLASS (ld_category_tree_view_parent_class)->dispose (gobject);
}
static void
ld_category_tree_view_get_property (GObject *object, guint property_id,
GValue *value, GParamSpec *pspec)
{
switch (property_id)
{
case PROP_CATEGORY:
g_value_set_object (value,
ld_category_view_get_category (LD_CATEGORY_VIEW (object)));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
static void
ld_category_tree_view_set_property (GObject *object, guint property_id,
const GValue *value, GParamSpec *pspec)
{
switch (property_id)
{
case PROP_CATEGORY:
ld_category_view_set_category (LD_CATEGORY_VIEW (object),
LD_CATEGORY (g_value_get_object (value)));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
}
}
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
reconstruct_prefix (LdCategoryTreeView *self)
{
LdCategory *iter;
gchar *start, *end;
start = g_strdup ("");
end = g_strdup ("");
for (iter = self->priv->category; iter;
iter = ld_category_get_parent (iter))
{
const gchar *name;
gchar *new_start, *new_end, *name_escaped;
/* Stop at the root category. */
if (!strcmp (ld_category_get_name (iter),
LD_LIBRARY_IDENTIFIER_SEPARATOR))
break;
name = ld_category_get_human_name (iter);
name_escaped = g_markup_escape_text (name, -1);
new_start = g_strconcat (start, "<small>", NULL);
new_end = g_strconcat (name_escaped, ":</small> ", end, NULL);
g_free (name_escaped);
g_free (start);
g_free (end);
start = new_start;
end = new_end;
}
g_free (self->priv->expander_prefix);
self->priv->expander_prefix = g_strconcat (start, end, NULL);
g_free (start);
g_free (end);
}
static void
on_symbol_selected (GObject *source,
LdSymbol *symbol, const gchar *path, LdCategoryTreeView *self)
{
g_signal_emit (self, LD_CATEGORY_VIEW_GET_INTERFACE (self)->
symbol_selected_signal, 0, symbol, path);
}
static void
on_symbol_deselected (GObject *source,
LdSymbol *symbol, const gchar *path, LdCategoryTreeView *self)
{
g_signal_emit (self, LD_CATEGORY_VIEW_GET_INTERFACE (self)->
symbol_deselected_signal, 0, symbol, path);
}
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static void
load_category_cb (gpointer data, gpointer user_data)
{
LdCategoryTreeView *self;
LdCategory *cat;
GtkWidget *expander, *child;
gchar *name, *label_markup;
g_return_if_fail (LD_IS_CATEGORY_TREE_VIEW (user_data));
g_return_if_fail (LD_IS_CATEGORY (data));
self = user_data;
cat = data;
name = g_markup_escape_text (ld_category_get_human_name (cat), -1);
label_markup = g_strconcat (self->priv->expander_prefix, name, NULL);
g_free (name);
expander = gtk_expander_new (label_markup);
gtk_expander_set_expanded (GTK_EXPANDER (expander), TRUE);
gtk_expander_set_use_markup (GTK_EXPANDER (expander), TRUE);
g_free (label_markup);
child = ld_category_tree_view_new (cat);
gtk_container_add (GTK_CONTAINER (expander), child);
gtk_box_pack_start (GTK_BOX (self), expander, FALSE, FALSE, 0);
g_signal_connect_after (child, "symbol-selected",
G_CALLBACK (on_symbol_selected), self);
g_signal_connect_after (child, "symbol-deselected",
G_CALLBACK (on_symbol_deselected), self);
}
static void
reload_category (LdCategoryTreeView *self)
{
g_return_if_fail (LD_IS_CATEGORY_TREE_VIEW (self));
/* Clear the container first, if there is already something in it. */
gtk_container_foreach (GTK_CONTAINER (self),
(GtkCallback) gtk_widget_destroy, NULL);
/* XXX: We might want to disconnect signal handlers. */
if (self->priv->category)
{
GSList *symbols, *children;
symbols = (GSList *) ld_category_get_symbols (self->priv->category);
children = (GSList *) ld_category_get_children (self->priv->category);
if (symbols)
{
GtkWidget *symbol_view;
symbol_view = ld_category_symbol_view_new (self->priv->category);
gtk_box_pack_start (GTK_BOX (self), symbol_view, FALSE, FALSE, 0);
g_signal_connect_after (symbol_view, "symbol-selected",
G_CALLBACK (on_symbol_selected), self);
g_signal_connect_after (symbol_view, "symbol-deselected",
G_CALLBACK (on_symbol_deselected), self);
}
if (children)
{
reconstruct_prefix (self);
g_slist_foreach (children, load_category_cb, self);
}
else if (!symbols)
gtk_box_pack_start (GTK_BOX (self),
create_empty_label (), FALSE, FALSE, 0);
}
}
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/* ===== Interface ========================================================= */
/**
* ld_category_tree_view_new:
* @category: (allow-none): a category to be assigned to the widget.
*
* Create an instance.
*/
GtkWidget *
ld_category_tree_view_new (LdCategory *category)
{
LdCategoryTreeView *self;
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self = g_object_new (LD_TYPE_CATEGORY_TREE_VIEW, NULL);
ld_category_view_set_category (LD_CATEGORY_VIEW (self), category);
return GTK_WIDGET (self);
}
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static void
ld_category_tree_view_set_category (LdCategoryView *iface, LdCategory *category)
{
LdCategoryTreeView *self;
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g_return_if_fail (LD_IS_CATEGORY_TREE_VIEW (iface));
g_return_if_fail (LD_IS_CATEGORY (category) || category == NULL);
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self = LD_CATEGORY_TREE_VIEW (iface);
if (self->priv->category)
{
g_signal_handlers_disconnect_by_func (self->priv->category,
reload_category, self);
g_object_unref (self->priv->category);
}
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self->priv->category = category;
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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");
}
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static LdCategory *
ld_category_tree_view_get_category (LdCategoryView *iface)
{
g_return_val_if_fail (LD_IS_CATEGORY_TREE_VIEW (iface), NULL);
return LD_CATEGORY_TREE_VIEW (iface)->priv->category;
}