* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
*
* This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Library General Public
+ * modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
+ * Lesser General Public License for more details.
*
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ * 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.
*/
-#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_draw (GtkWidget *widget,
- GdkRectangle *area);
-static gint gtk_bin_expose (GtkWidget *widget,
- GdkEventExpose *event);
-static void gtk_bin_add (GtkContainer *container,
- GtkWidget *widget);
-static void gtk_bin_remove (GtkContainer *container,
- GtkWidget *widget);
-static void gtk_bin_foreach (GtkContainer *container,
- GtkCallback callback,
- gpointer callback_data);
-
-
-static GtkContainerClass *parent_class = NULL;
+/*
+ * Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
+ * file for a list of people on the GTK+ Team. See the ChangeLog
+ * files for a list of changes. These files are distributed with
+ * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
+ */
-guint
-gtk_bin_get_type ()
-{
- static guint bin_type = 0;
-
- if (!bin_type)
- {
- GtkTypeInfo bin_info =
- {
- "GtkBin",
- sizeof (GtkBin),
- sizeof (GtkBinClass),
- (GtkClassInitFunc) gtk_bin_class_init,
- (GtkObjectInitFunc) gtk_bin_init,
- (GtkArgSetFunc) NULL,
- (GtkArgGetFunc) NULL,
- };
-
- bin_type = gtk_type_unique (gtk_container_get_type (), &bin_info);
- }
+/**
+ * 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.
+ */
- return bin_type;
-}
+#include "config.h"
+#include "gtkbin.h"
+#include "gtkextendedlayout.h"
+#include "gtkintl.h"
+#include "gtkalias.h"
+
+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_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)
{
- 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_container_get_type ());
-
- widget_class->map = gtk_bin_map;
- widget_class->unmap = gtk_bin_unmap;
- widget_class->draw = gtk_bin_draw;
- widget_class->expose_event = gtk_bin_expose;
-
container_class->add = gtk_bin_add;
container_class->remove = gtk_bin_remove;
- container_class->foreach = gtk_bin_foreach;
+ container_class->forall = gtk_bin_forall;
+ container_class->child_type = gtk_bin_child_type;
}
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;
}
-static void
-gtk_bin_map (GtkWidget *widget)
+static GType
+gtk_bin_child_type (GtkContainer *container)
{
- 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 (!GTK_WIDGET_NO_WINDOW (widget))
- gdk_window_show (widget->window);
+ if (!GTK_BIN (container)->child)
+ return GTK_TYPE_WIDGET;
else
- gtk_widget_queue_draw (widget);
-
- if (bin->child &&
- GTK_WIDGET_VISIBLE (bin->child) &&
- !GTK_WIDGET_MAPPED (bin->child))
- gtk_widget_map (bin->child);
+ return G_TYPE_NONE;
}
static void
-gtk_bin_unmap (GtkWidget *widget)
+gtk_bin_add (GtkContainer *container,
+ GtkWidget *child)
{
- GtkBin *bin;
-
- g_return_if_fail (widget != NULL);
- g_return_if_fail (GTK_IS_BIN (widget));
+ GtkBin *bin = GTK_BIN (container);
- GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
- bin = GTK_BIN (widget);
-
- if (GTK_WIDGET_NO_WINDOW (widget))
- gdk_window_clear_area (widget->window,
- widget->allocation.x,
- widget->allocation.y,
- widget->allocation.width,
- widget->allocation.height);
- else
- gdk_window_hide (widget->window);
+ if (bin->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; "
+ "it already contains a widget of type %s",
+ 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)));
+ return;
+ }
- if (bin->child &&
- GTK_WIDGET_VISIBLE (bin->child) &&
- GTK_WIDGET_MAPPED (bin->child))
- gtk_widget_unmap (bin->child);
+ gtk_widget_set_parent (child, GTK_WIDGET (bin));
+ bin->child = child;
}
static void
-gtk_bin_draw (GtkWidget *widget,
- GdkRectangle *area)
+gtk_bin_remove (GtkContainer *container,
+ GtkWidget *child)
{
- GtkBin *bin;
- GdkRectangle child_area;
-
- g_return_if_fail (widget != NULL);
- g_return_if_fail (GTK_IS_BIN (widget));
+ GtkBin *bin = GTK_BIN (container);
+ gboolean widget_was_visible;
- if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_MAPPED (widget))
- {
- bin = GTK_BIN (widget);
+ g_return_if_fail (bin->child == child);
- if (bin->child &&
- gtk_widget_intersect (bin->child, area, &child_area))
- gtk_widget_draw (bin->child, &child_area);
- }
+ widget_was_visible = gtk_widget_get_visible (child);
+
+ gtk_widget_unparent (child);
+ bin->child = NULL;
+
+ /* 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)
+ gtk_widget_queue_resize (GTK_WIDGET (container));
}
-static gint
-gtk_bin_expose (GtkWidget *widget,
- GdkEventExpose *event)
+static void
+gtk_bin_forall (GtkContainer *container,
+ gboolean include_internals,
+ GtkCallback callback,
+ gpointer callback_data)
{
- GtkBin *bin;
- GdkEventExpose child_event;
+ GtkBin *bin = GTK_BIN (container);
- g_return_val_if_fail (widget != NULL, FALSE);
- g_return_val_if_fail (GTK_IS_BIN (widget), FALSE);
- g_return_val_if_fail (event != NULL, FALSE);
+ if (bin->child)
+ (* callback) (bin->child, callback_data);
+}
- if (GTK_WIDGET_DRAWABLE (widget))
- {
- bin = GTK_BIN (widget);
- child_event = *event;
- if (bin->child &&
- GTK_WIDGET_NO_WINDOW (bin->child) &&
- gtk_widget_intersect (bin->child, &event->area, &child_event.area))
- gtk_widget_event (bin->child, (GdkEvent*) &child_event);
- }
+/* 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);
- return FALSE;
+ 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 void
-gtk_bin_add (GtkContainer *container,
- GtkWidget *widget)
+static gboolean
+gtk_bin_is_height_for_width (GtkExtendedLayout *layout)
{
- GtkBin *bin;
+ GtkBin *bin = GTK_BIN (layout);
- g_return_if_fail (container != NULL);
- g_return_if_fail (GTK_IS_BIN (container));
- g_return_if_fail (widget != NULL);
-
- bin = GTK_BIN (container);
+ if (bin->child)
+ return gtk_extended_layout_is_height_for_width (GTK_EXTENDED_LAYOUT (bin->child));
- if (!bin->child)
- {
- gtk_widget_set_parent (widget, GTK_WIDGET (container));
-
- if (GTK_WIDGET_VISIBLE (widget->parent))
- {
- if (GTK_WIDGET_REALIZED (widget->parent) &&
- !GTK_WIDGET_REALIZED (widget))
- gtk_widget_realize (widget);
-
- if (GTK_WIDGET_MAPPED (widget->parent) &&
- !GTK_WIDGET_MAPPED (widget))
- gtk_widget_map (widget);
- }
-
- bin->child = widget;
-
- if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (container))
- gtk_widget_queue_resize (widget);
- }
+ return TRUE;
}
static void
-gtk_bin_remove (GtkContainer *container,
- GtkWidget *widget)
+get_child_padding_delta (GtkBin *bin,
+ gint *delta_h,
+ gint *delta_v)
{
- GtkBin *bin;
+ gint hmin, vmin, child_hmin, child_vmin;
- g_return_if_fail (container != NULL);
- g_return_if_fail (GTK_IS_BIN (container));
- g_return_if_fail (widget != NULL);
+ gtk_extended_layout_get_desired_width (GTK_EXTENDED_LAYOUT (bin), &hmin, NULL);
+ gtk_extended_layout_get_desired_height (GTK_EXTENDED_LAYOUT (bin), &vmin, NULL);
- bin = GTK_BIN (container);
+ 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);
- if (bin->child == widget)
- {
- gtk_widget_unparent (widget);
- bin->child = 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 (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (container))
- gtk_widget_queue_resize (GTK_WIDGET (container));
+ 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_foreach (GtkContainer *container,
- GtkCallback callback,
- gpointer callback_data)
+gtk_bin_get_height_for_width (GtkExtendedLayout *layout,
+ gint width,
+ gint *minimum_height,
+ gint *natural_height)
{
- GtkBin *bin;
+ GtkBin *bin = GTK_BIN (layout);
+ gint hdelta, vdelta, child_min, child_nat;
- g_return_if_fail (container != NULL);
- g_return_if_fail (GTK_IS_BIN (container));
- g_return_if_fail (callback != NULL);
+ 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);
+}
- bin = GTK_BIN (container);
- if (bin->child)
- (* callback) (bin->child, callback_data);
+/**
+ * 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);
+
+ return bin->child;
}
+
+#define __GTK_BIN_C__
+#include "gtkaliasdef.c"
projects / ~andy / gtk / blobdiff