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GtkListBox: Optimize _get_row_at_y a bit

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Use g_sequence_lookup for a binary search over the rows.
This commit is contained in:
Timm Bäder
2016-01-06 10:58:08 +01:00
parent a9d5fa4cfe
commit 47afccb41b
1 changed files with 24 additions and 17 deletions
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41
gtk/gtklistbox.c
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@ -714,6 +714,23 @@ gtk_list_box_get_row_at_index (GtkListBox *box,
return NULL;
}
static int
row_y_cmp_func (gconstpointer a,
gconstpointer b,
gpointer user_data)
{
int y = GPOINTER_TO_INT (b);
GtkListBoxRowPrivate *row_priv = ROW_PRIV (a);
if (y < row_priv->y)
return 1;
else if (y >= row_priv->y + row_priv->height)
return -1;
return 0;
}
/**
* gtk_list_box_get_row_at_y:
* @box: a #GtkListBox
@ -730,29 +747,19 @@ GtkListBoxRow *
gtk_list_box_get_row_at_y (GtkListBox *box,
gint y)
{
GtkListBoxRow *row, *found_row;
GtkListBoxRowPrivate *row_priv;
GSequenceIter *iter;
g_return_val_if_fail (GTK_IS_LIST_BOX (box), NULL);
/* TODO: This should use g_sequence_search */
iter = g_sequence_lookup (BOX_PRIV (box)->children,
GINT_TO_POINTER (y),
row_y_cmp_func,
NULL);
found_row = NULL;
for (iter = g_sequence_get_begin_iter (BOX_PRIV (box)->children);
!g_sequence_iter_is_end (iter);
iter = g_sequence_iter_next (iter))
{
row = (GtkListBoxRow*) g_sequence_get (iter);
row_priv = ROW_PRIV (row);
if (y >= row_priv->y && y < (row_priv->y + row_priv->height))
{
found_row = row;
break;
}
}
if (iter)
return GTK_LIST_BOX_ROW (g_sequence_get (iter));
return found_row;
return NULL;
}
/**