* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
-#include <config.h>
+/**
+ * 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.
+ */
+
+#include "config.h"
#include "gtkbin.h"
+#include "gtkextendedlayout.h"
#include "gtkintl.h"
#include "gtkalias.h"
static GType gtk_bin_child_type (GtkContainer *container);
-G_DEFINE_ABSTRACT_TYPE (GtkBin, gtk_bin, GTK_TYPE_CONTAINER)
+static void gtk_bin_extended_layout_init (GtkExtendedLayoutIface *iface);
+static gboolean gtk_bin_is_height_for_width (GtkExtendedLayout *layout);
+static void gtk_bin_get_width_for_height (GtkExtendedLayout *layout,
+ gint height,
+ gint *minimum_width,
+ gint *natural_width);
+static void gtk_bin_get_height_for_width (GtkExtendedLayout *layout,
+ gint width,
+ gint *minimum_height,
+ gint *natural_height);
+
+static GtkExtendedLayoutIface *parent_extended_layout_iface;
+
+G_DEFINE_ABSTRACT_TYPE_WITH_CODE (GtkBin, gtk_bin, GTK_TYPE_CONTAINER,
+ G_IMPLEMENT_INTERFACE (GTK_TYPE_EXTENDED_LAYOUT,
+ gtk_bin_extended_layout_init))
static void
gtk_bin_class_init (GtkBinClass *class)
static void
gtk_bin_init (GtkBin *bin)
{
- GTK_WIDGET_SET_FLAGS (bin, GTK_NO_WINDOW);
+ gtk_widget_set_has_window (GTK_WIDGET (bin), FALSE);
bin->child = NULL;
}
g_return_if_fail (bin->child == child);
- widget_was_visible = GTK_WIDGET_VISIBLE (child);
+ widget_was_visible = gtk_widget_get_visible (child);
gtk_widget_unparent (child);
bin->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)
(* callback) (bin->child, callback_data);
}
+
+/* GtkBin widgets define the padding and borders independantly so
+ * we cannot provide a generic get_desired_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
+gtk_bin_extended_layout_init (GtkExtendedLayoutIface *iface)
+{
+ parent_extended_layout_iface = g_type_interface_peek_parent (iface);
+
+ iface->is_height_for_width = gtk_bin_is_height_for_width;
+ iface->get_width_for_height = gtk_bin_get_width_for_height;
+ iface->get_height_for_width = gtk_bin_get_height_for_width;
+}
+
+static gboolean
+gtk_bin_is_height_for_width (GtkExtendedLayout *layout)
+{
+ GtkBin *bin = GTK_BIN (layout);
+
+ if (bin->child)
+ return gtk_extended_layout_is_height_for_width (GTK_EXTENDED_LAYOUT (bin->child));
+
+ return TRUE;
+}
+
+static void
+get_child_padding_delta (GtkBin *bin,
+ gint *delta_h,
+ gint *delta_v)
+{
+ gint hmin, vmin, child_hmin, child_vmin;
+
+ gtk_extended_layout_get_desired_width (GTK_EXTENDED_LAYOUT (bin), &hmin, NULL);
+ gtk_extended_layout_get_desired_height (GTK_EXTENDED_LAYOUT (bin), &vmin, NULL);
+
+ gtk_extended_layout_get_desired_width (GTK_EXTENDED_LAYOUT (bin->child), &child_hmin, NULL);
+ gtk_extended_layout_get_desired_height (GTK_EXTENDED_LAYOUT (bin->child), &child_vmin, NULL);
+
+ *delta_h = hmin - child_hmin;
+ *delta_v = vmin - child_vmin;
+}
+
+static void
+gtk_bin_get_width_for_height (GtkExtendedLayout *layout,
+ gint height,
+ gint *minimum_width,
+ gint *natural_width)
+{
+ GtkBin *bin = GTK_BIN (layout);
+ gint hdelta, vdelta, child_min, child_nat;
+
+ if (bin->child)
+ {
+ get_child_padding_delta (bin, &hdelta, &vdelta);
+
+ gtk_extended_layout_get_width_for_height (GTK_EXTENDED_LAYOUT (bin->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_EXTENDED_LAYOUT_GET_IFACE (layout)->get_desired_width (layout, minimum_width, natural_width);
+}
+
+static void
+gtk_bin_get_height_for_width (GtkExtendedLayout *layout,
+ gint width,
+ gint *minimum_height,
+ gint *natural_height)
+{
+ GtkBin *bin = GTK_BIN (layout);
+ gint hdelta, vdelta, child_min, child_nat;
+
+ if (bin->child)
+ {
+ get_child_padding_delta (bin, &hdelta, &vdelta);
+
+ gtk_extended_layout_get_height_for_width (GTK_EXTENDED_LAYOUT (bin->child),
+ width - hdelta,
+ &child_min, &child_nat);
+
+ if (minimum_height)
+ *minimum_height = child_min + vdelta;
+
+ if (natural_height)
+ *natural_height = child_nat + vdelta;
+ }
+ else
+ GTK_EXTENDED_LAYOUT_GET_IFACE (layout)->get_desired_height (layout, 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: pointer to child of the #GtkBin
+ *
+ * Return value: (transfer none): pointer to child of the #GtkBin
**/
GtkWidget*
gtk_bin_get_child (GtkBin *bin)
projects / ~andy / gtk / blobdiff