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cssnode: Add a style-changed signal

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The signal gets emitted whenever the style needs to be changed.
This commit is contained in:
Benjamin Otte
2015-03-05 17:35:57 +01:00
parent 6988f9b818
commit 10d39171d9
2 changed files with 26 additions and 8 deletions
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31
gtk/gtkcssnode.c
View File

@ -34,6 +34,7 @@ G_DEFINE_TYPE (GtkCssNode, gtk_css_node, G_TYPE_OBJECT)
enum { enum {
NODE_ADDED, NODE_ADDED,
NODE_REMOVED, NODE_REMOVED,
STYLE_CHANGED,
LAST_SIGNAL LAST_SIGNAL
}; };
@ -387,6 +388,17 @@ gtk_css_node_real_node_added (GtkCssNode *parent,
node->parent = parent; node->parent = parent;
} }
static void
gtk_css_node_real_style_changed (GtkCssNode *cssnode,
GtkCssStyle *old_style,
GtkCssStyle *new_style)
{
g_object_ref (new_style);
g_object_unref (old_style);
cssnode->style = new_style;
}
static void static void
gtk_css_node_class_init (GtkCssNodeClass *klass) gtk_css_node_class_init (GtkCssNodeClass *klass)
{ {
@ -408,6 +420,7 @@ gtk_css_node_class_init (GtkCssNodeClass *klass)
klass->node_added = gtk_css_node_real_node_added; klass->node_added = gtk_css_node_real_node_added;
klass->node_removed = gtk_css_node_real_node_removed; klass->node_removed = gtk_css_node_real_node_removed;
klass->style_changed = gtk_css_node_real_style_changed;
cssnode_signals[NODE_ADDED] = cssnode_signals[NODE_ADDED] =
g_signal_new (I_("node-added"), g_signal_new (I_("node-added"),
@ -427,6 +440,15 @@ gtk_css_node_class_init (GtkCssNodeClass *klass)
_gtk_marshal_VOID__OBJECT_OBJECT, _gtk_marshal_VOID__OBJECT_OBJECT,
G_TYPE_NONE, 2, G_TYPE_NONE, 2,
GTK_TYPE_CSS_NODE, GTK_TYPE_CSS_NODE); GTK_TYPE_CSS_NODE, GTK_TYPE_CSS_NODE);
cssnode_signals[STYLE_CHANGED] =
g_signal_new (I_("style-changed"),
G_TYPE_FROM_CLASS (object_class),
G_SIGNAL_RUN_LAST,
G_STRUCT_OFFSET (GtkCssNodeClass, style_changed),
NULL, NULL,
_gtk_marshal_VOID__OBJECT_OBJECT,
G_TYPE_NONE, 2,
GTK_TYPE_CSS_STYLE, GTK_TYPE_CSS_STYLE);
} }
static void static void
@ -640,14 +662,7 @@ gtk_css_node_set_style (GtkCssNode *cssnode,
if (cssnode->style == style) if (cssnode->style == style)
return FALSE; return FALSE;
if (style) g_signal_emit (cssnode, cssnode_signals[STYLE_CHANGED], 0, cssnode->style, style);
g_object_ref (style);
if (cssnode->style)
g_object_unref (cssnode->style);
cssnode->style = style;
return TRUE; return TRUE;
} }

3
gtk/gtkcssnodeprivate.h
View File

@ -71,6 +71,9 @@ struct _GtkCssNodeClass
void (* node_removed) (GtkCssNode *cssnode, void (* node_removed) (GtkCssNode *cssnode,
GtkCssNode *child, GtkCssNode *child,
GtkCssNode *previous); GtkCssNode *previous);
void (* style_changed) (GtkCssNode *cssnode,
GtkCssStyle *old_style,
GtkCssStyle *new_style);
gboolean (* init_matcher) (GtkCssNode *cssnode, gboolean (* init_matcher) (GtkCssNode *cssnode,
GtkCssMatcher *matcher); GtkCssMatcher *matcher);