* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/*
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
-#include "gtkbin.h"
-
-
-static void gtk_bin_class_init (GtkBinClass *klass);
-static void gtk_bin_init (GtkBin *bin);
-static void gtk_bin_map (GtkWidget *widget);
-static void gtk_bin_unmap (GtkWidget *widget);
-static void gtk_bin_add (GtkContainer *container,
- GtkWidget *widget);
-static void gtk_bin_remove (GtkContainer *container,
- GtkWidget *widget);
-static void gtk_bin_forall (GtkContainer *container,
- gboolean include_internals,
- GtkCallback callback,
- gpointer callback_data);
-static GtkType gtk_bin_child_type (GtkContainer*container);
-
+/**
+ * SECTION:gtkbin
+ * @Short_description: A container with just one child
+ * @Title: GtkBin
+ *
+ * The #GtkBin widget is a container with just one child.
+ * It is not very useful itself, but it is useful for deriving subclasses,
+ * since it provides common code needed for handling a single child widget.
+ *
+ * Many GTK+ widgets are subclasses of #GtkBin, including #GtkWindow,
+ * #GtkButton, #GtkFrame, #GtkHandleBox or #GtkScrolledWindow.
+ */
-static GtkContainerClass *parent_class = NULL;
+#include "config.h"
+#include "gtkbin.h"
+#include "gtksizerequest.h"
+#include "gtkintl.h"
-GtkType
-gtk_bin_get_type (void)
+struct _GtkBinPrivate
{
- static guint bin_type = 0;
-
- if (!bin_type)
- {
- static const GtkTypeInfo bin_info =
- {
- "GtkBin",
- sizeof (GtkBin),
- sizeof (GtkBinClass),
- (GtkClassInitFunc) gtk_bin_class_init,
- (GtkObjectInitFunc) gtk_bin_init,
- /* reserved_1 */ NULL,
- /* reserved_2 */ NULL,
- (GtkClassInitFunc) NULL,
- };
-
- bin_type = gtk_type_unique (GTK_TYPE_CONTAINER, &bin_info);
- }
-
- return bin_type;
-}
+ GtkWidget *child;
+};
+
+static void gtk_bin_add (GtkContainer *container,
+ GtkWidget *widget);
+static void gtk_bin_remove (GtkContainer *container,
+ GtkWidget *widget);
+static void gtk_bin_forall (GtkContainer *container,
+ gboolean include_internals,
+ GtkCallback callback,
+ gpointer callback_data);
+static GType gtk_bin_child_type (GtkContainer *container);
+
+
+static void gtk_bin_get_preferred_width_for_height (GtkWidget *widget,
+ gint height,
+ gint *minimum_width,
+ gint *natural_width);
+static void gtk_bin_get_preferred_height_for_width (GtkWidget *widget,
+ gint width,
+ gint *minimum_height,
+ gint *natural_height);
+
+G_DEFINE_ABSTRACT_TYPE (GtkBin, gtk_bin, GTK_TYPE_CONTAINER)
static void
gtk_bin_class_init (GtkBinClass *class)
{
- GtkObjectClass *object_class;
- GtkWidgetClass *widget_class;
- GtkContainerClass *container_class;
-
- object_class = (GtkObjectClass*) class;
- widget_class = (GtkWidgetClass*) class;
- container_class = (GtkContainerClass*) class;
-
- parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
+ GtkWidgetClass *widget_class = (GtkWidgetClass*) class;
+ GtkContainerClass *container_class = (GtkContainerClass*) class;
- widget_class->map = gtk_bin_map;
- widget_class->unmap = gtk_bin_unmap;
+ widget_class->get_preferred_width_for_height = gtk_bin_get_preferred_width_for_height;
+ widget_class->get_preferred_height_for_width = gtk_bin_get_preferred_height_for_width;
container_class->add = gtk_bin_add;
container_class->remove = gtk_bin_remove;
container_class->forall = gtk_bin_forall;
container_class->child_type = gtk_bin_child_type;
+
+ g_type_class_add_private (class, sizeof (GtkBinPrivate));
}
static void
gtk_bin_init (GtkBin *bin)
{
- GTK_WIDGET_SET_FLAGS (bin, GTK_NO_WINDOW);
+ GtkBinPrivate *priv;
- bin->child = NULL;
-}
+ bin->priv = G_TYPE_INSTANCE_GET_PRIVATE (bin,
+ GTK_TYPE_BIN,
+ GtkBinPrivate);
+ priv = bin->priv;
+ gtk_widget_set_has_window (GTK_WIDGET (bin), FALSE);
-static GtkType
-gtk_bin_child_type (GtkContainer *container)
-{
- if (!GTK_BIN (container)->child)
- return GTK_TYPE_WIDGET;
- else
- return GTK_TYPE_NONE;
+ priv->child = NULL;
}
-static void
-gtk_bin_map (GtkWidget *widget)
-{
- GtkBin *bin;
-
- g_return_if_fail (widget != NULL);
- g_return_if_fail (GTK_IS_BIN (widget));
-
- GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
- bin = GTK_BIN (widget);
- if (bin->child &&
- GTK_WIDGET_VISIBLE (bin->child) &&
- !GTK_WIDGET_MAPPED (bin->child))
- gtk_widget_map (bin->child);
-
- if (!GTK_WIDGET_NO_WINDOW (widget))
- gdk_window_show (widget->window);
-}
-
-static void
-gtk_bin_unmap (GtkWidget *widget)
+static GType
+gtk_bin_child_type (GtkContainer *container)
{
- GtkBin *bin;
+ GtkBinPrivate *priv = GTK_BIN (container)->priv;
- g_return_if_fail (widget != NULL);
- g_return_if_fail (GTK_IS_BIN (widget));
-
- GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
- bin = GTK_BIN (widget);
-
- if (!GTK_WIDGET_NO_WINDOW (widget))
- gdk_window_hide (widget->window);
-
- if (bin->child && GTK_WIDGET_MAPPED (bin->child))
- gtk_widget_unmap (bin->child);
+ if (!priv->child)
+ return GTK_TYPE_WIDGET;
+ else
+ return G_TYPE_NONE;
}
static void
gtk_bin_add (GtkContainer *container,
GtkWidget *child)
{
- GtkBin *bin;
+ GtkBin *bin = GTK_BIN (container);
+ GtkBinPrivate *priv = bin->priv;
- g_return_if_fail (container != NULL);
- g_return_if_fail (GTK_IS_BIN (container));
- g_return_if_fail (child != NULL);
- g_return_if_fail (GTK_IS_WIDGET (child));
-
- bin = GTK_BIN (container);
-
- if (bin->child != NULL)
+ if (priv->child != NULL)
{
g_warning ("Attempting to add a widget with type %s to a %s, "
"but as a GtkBin subclass a %s can only contain one widget at a time; "
g_type_name (G_OBJECT_TYPE (child)),
g_type_name (G_OBJECT_TYPE (bin)),
g_type_name (G_OBJECT_TYPE (bin)),
- g_type_name (G_OBJECT_TYPE (bin->child)));
+ g_type_name (G_OBJECT_TYPE (priv->child)));
return;
}
gtk_widget_set_parent (child, GTK_WIDGET (bin));
- bin->child = child;
-
- if (GTK_WIDGET_REALIZED (child->parent))
- gtk_widget_realize (child);
-
- if (GTK_WIDGET_VISIBLE (child->parent) && GTK_WIDGET_VISIBLE (child))
- {
- if (GTK_WIDGET_MAPPED (child->parent))
- gtk_widget_map (child);
-
- gtk_widget_queue_resize (child);
- }
+ priv->child = child;
}
static void
gtk_bin_remove (GtkContainer *container,
GtkWidget *child)
{
- GtkBin *bin;
+ GtkBin *bin = GTK_BIN (container);
+ GtkBinPrivate *priv = bin->priv;
gboolean widget_was_visible;
- g_return_if_fail (container != NULL);
- g_return_if_fail (GTK_IS_BIN (container));
- g_return_if_fail (child != NULL);
- g_return_if_fail (GTK_IS_WIDGET (child));
-
- bin = GTK_BIN (container);
- g_return_if_fail (bin->child == child);
+ g_return_if_fail (priv->child == child);
- widget_was_visible = GTK_WIDGET_VISIBLE (child);
+ widget_was_visible = gtk_widget_get_visible (child);
gtk_widget_unparent (child);
- bin->child = NULL;
+ priv->child = NULL;
- /* queue resize regardless of GTK_WIDGET_VISIBLE (container),
+ /* queue resize regardless of gtk_widget_get_visible (container),
* since that's what is needed by toplevels, which derive from GtkBin.
*/
if (widget_was_visible)
GtkCallback callback,
gpointer callback_data)
{
- GtkBin *bin;
+ GtkBin *bin = GTK_BIN (container);
+ GtkBinPrivate *priv = bin->priv;
+
+ if (priv->child)
+ (* callback) (priv->child, callback_data);
+}
+
+
+/* GtkBin widgets define the padding and borders independantly so
+ * we cannot provide a generic get_size() for the same reason
+ * we never implemented size_request() here.
+ *
+ * But for cases where the GtkBin class's padding is constant and
+ * does not vary based on allocation (most cases), we can at least
+ * deduce a common code path for the get_width_for_height()/get_height_for_width()
+ * cases by using the delta of the base size requsts.
+ */
+static void
+get_child_padding_delta (GtkBin *bin,
+ gint *delta_h,
+ gint *delta_v)
+{
+ GtkBinPrivate *priv = bin->priv;
+ gint hmin, vmin, hnat, vnat, child_hmin, child_vmin;
+
+ /* we can't use gtk_widget_get_preferred_width() wrapper
+ * because we want our "original" request, not any external
+ * adjustments from set_size_request() or whatever. we have
+ * to ask for natural also because NULL isn't allowed for the
+ * direct vfuncs
+ */
+ GTK_WIDGET_GET_CLASS (bin)->get_preferred_width (GTK_WIDGET (bin), &hmin, &hnat);
+ GTK_WIDGET_GET_CLASS (bin)->adjust_size_request (GTK_WIDGET (bin),
+ GTK_ORIENTATION_HORIZONTAL, &hmin, &hnat);
+
+ GTK_WIDGET_GET_CLASS (bin)->get_preferred_height (GTK_WIDGET (bin), &vmin, &vnat);
+ GTK_WIDGET_GET_CLASS (bin)->adjust_size_request (GTK_WIDGET (bin),
+ GTK_ORIENTATION_VERTICAL, &vmin, &vnat);
+
+ gtk_widget_get_preferred_width (priv->child, &child_hmin, NULL);
+ gtk_widget_get_preferred_height (priv->child, &child_vmin, NULL);
+
+ *delta_h = hmin - child_hmin;
+ *delta_v = vmin - child_vmin;
+}
+
+static void
+gtk_bin_get_preferred_width_for_height (GtkWidget *widget,
+ gint height,
+ gint *minimum_width,
+ gint *natural_width)
+{
+ GtkBin *bin = GTK_BIN (widget);
+ GtkBinPrivate *priv = bin->priv;
+ gint hdelta, vdelta, child_min, child_nat;
+
+ if (priv->child)
+ {
+ get_child_padding_delta (bin, &hdelta, &vdelta);
+
+ gtk_widget_get_preferred_width_for_height (priv->child,
+ height - vdelta,
+ &child_min, &child_nat);
+
+ if (minimum_width)
+ *minimum_width = child_min + hdelta;
+
+ if (natural_width)
+ *natural_width = child_nat + hdelta;
+ }
+ else
+ GTK_WIDGET_GET_CLASS (widget)->get_preferred_width (widget, minimum_width, natural_width);
+}
+
+static void
+gtk_bin_get_preferred_height_for_width (GtkWidget *widget,
+ gint width,
+ gint *minimum_height,
+ gint *natural_height)
+{
+ GtkBin *bin = GTK_BIN (widget);
+ GtkBinPrivate *priv = bin->priv;
+ gint hdelta, vdelta, child_min, child_nat;
+
+ if (priv->child)
+ {
+ get_child_padding_delta (bin, &hdelta, &vdelta);
- g_return_if_fail (container != NULL);
- g_return_if_fail (GTK_IS_BIN (container));
- g_return_if_fail (callback != NULL);
+ gtk_widget_get_preferred_height_for_width (priv->child,
+ width - hdelta,
+ &child_min, &child_nat);
- bin = GTK_BIN (container);
+ if (minimum_height)
+ *minimum_height = child_min + vdelta;
+
+ if (natural_height)
+ *natural_height = child_nat + vdelta;
+ }
+ else
+ GTK_WIDGET_GET_CLASS (widget)->get_preferred_height (widget, minimum_height, natural_height);
+}
+
+
+/**
+ * gtk_bin_get_child:
+ * @bin: a #GtkBin
+ *
+ * Gets the child of the #GtkBin, or %NULL if the bin contains
+ * no child widget. The returned widget does not have a reference
+ * added, so you do not need to unref it.
+ *
+ * Return value: (transfer none): pointer to child of the #GtkBin
+ **/
+GtkWidget*
+gtk_bin_get_child (GtkBin *bin)
+{
+ g_return_val_if_fail (GTK_IS_BIN (bin), NULL);
- if (bin->child)
- (* callback) (bin->child, callback_data);
+ return bin->priv->child;
+}
+
+void
+_gtk_bin_set_child (GtkBin *bin,
+ GtkWidget *widget)
+{
+ bin->priv->child = widget;
}
projects / ~andy / gtk / blobdiff