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Support GtkWidget expand properties in GtkBox

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This consists of:
* expand a child if either child->expand || gtk_widget_get_expand(child)
* override compute_expand so that child->expand will cause us to
  return TRUE for gtk_widget_get_expand()

https://bugzilla.gnome.org/show_bug.cgi?id=628902
This commit is contained in:
Havoc Pennington 2010-09-06 12:30:40 -04:00 committed by Matthias Clasen
parent 7597a35477
commit 8abb18f910
1 changed files with 72 additions and 6 deletions
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78
gtk/gtkbox.c
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@ -142,6 +142,10 @@ struct _GtkBoxChild
static void gtk_box_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_box_compute_expand (GtkWidget *widget,
gboolean *hexpand,
gboolean *vexpand);
static void gtk_box_set_property (GObject *object,
guint prop_id,
const GValue *value,
@ -150,7 +154,6 @@ static void gtk_box_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_box_add (GtkContainer *container,
GtkWidget *widget);
static void gtk_box_remove (GtkContainer *container,
@ -208,6 +211,7 @@ gtk_box_class_init (GtkBoxClass *class)
widget_class->get_preferred_height = gtk_box_get_preferred_height;
widget_class->get_preferred_height_for_width = gtk_box_get_preferred_height_for_width;
widget_class->get_preferred_width_for_height = gtk_box_get_preferred_width_for_height;
widget_class->compute_expand = gtk_box_compute_expand;
container_class->add = gtk_box_add;
container_class->remove = gtk_box_remove;
@ -392,7 +396,7 @@ count_expand_children (GtkBox *box,
if (gtk_widget_get_visible (child->widget))
{
*visible_children += 1;
if (child->expand)
if (child->expand || gtk_widget_compute_expand (child->widget, private->orientation))
*expand_children += 1;
}
}
@ -570,7 +574,7 @@ gtk_box_size_allocate (GtkWidget *widget,
{
child_size = sizes[i].minimum_size + child->padding * 2;
if (child->expand)
if (child->expand || gtk_widget_compute_expand (child->widget, private->orientation))
{
child_size += extra;
@ -642,6 +646,56 @@ gtk_box_size_allocate (GtkWidget *widget,
}
}
static void
gtk_box_compute_expand (GtkWidget *widget,
gboolean *hexpand_p,
gboolean *vexpand_p)
{
GtkBoxPrivate *private = GTK_BOX (widget)->priv;
GList *children;
GtkBoxChild *child;
gboolean our_expand;
gboolean opposite_expand;
GtkOrientation opposite_orientation;
if (private->orientation == GTK_ORIENTATION_HORIZONTAL)
opposite_orientation = GTK_ORIENTATION_VERTICAL;
else
opposite_orientation = GTK_ORIENTATION_HORIZONTAL;
our_expand = FALSE;
opposite_expand = FALSE;
for (children = private->children; children; children = children->next)
{
child = children->data;
/* we don't recurse into children anymore as soon as we know
* expand=TRUE in an orientation
*/
if (child->expand || (!our_expand && gtk_widget_compute_expand (child->widget, private->orientation)))
our_expand = TRUE;
if (!opposite_expand && gtk_widget_compute_expand (child->widget, opposite_orientation))
opposite_expand = TRUE;
if (our_expand && opposite_expand)
break;
}
if (private->orientation == GTK_ORIENTATION_HORIZONTAL)
{
*hexpand_p = our_expand;
*vexpand_p = opposite_expand;
}
else
{
*hexpand_p = opposite_expand;
*vexpand_p = our_expand;
}
}
static GType
gtk_box_child_type (GtkContainer *container)
{
@ -1039,7 +1093,7 @@ gtk_box_compute_size_for_opposing_orientation (GtkBox *box,
{
child_size = sizes[i].minimum_size + child->padding * 2;
if (child->expand)
if (child->expand || gtk_widget_compute_expand (child->widget, private->orientation))
{
child_size += extra;
@ -1536,8 +1590,20 @@ gtk_box_set_child_packing (GtkBox *box,
gtk_widget_freeze_child_notify (child);
if (list)
{
child_info->expand = expand != FALSE;
gtk_widget_child_notify (child, "expand");
gboolean expanded;
expanded = expand != FALSE;
/* avoid setting expand if unchanged, since queue_compute_expand
* can be expensive-ish
*/
if (child_info->expand != expanded)
{
child_info->expand = expand != FALSE;
gtk_widget_queue_compute_expand (GTK_WIDGET (box));
gtk_widget_child_notify (child, "expand");
}
child_info->fill = fill != FALSE;
gtk_widget_child_notify (child, "fill");
child_info->padding = padding;