moving from https://github.com/perberos/mate-desktop-environment

author: Perberos <[email protected]> 2011-12-01 22:24:23 -0300
committer: Perberos <[email protected]> 2011-12-01 22:24:23 -0300
commit: 0e004c696b0e68b2cff37a4c3315b022a35eaf43 (patch)
tree: 43261e815529cb9518ed7be37af13b846af8b26b /libcaja-private/caja-keep-last-vertical-box.c
download: caja-0e004c696b0e68b2cff37a4c3315b022a35eaf43.tar.bz2
caja-0e004c696b0e68b2cff37a4c3315b022a35eaf43.tar.xz
1 files changed, 166 insertions, 0 deletions
diff --git a/libcaja-private/caja-keep-last-vertical-box.c b/libcaja-private/caja-keep-last-vertical-box.c
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+/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
+
+/* caja-keep-last-vertical-box.c: Subclass of GtkVBox that clips off
+ items that don't fit, except the last one.
+
+ Copyright (C) 2000 Eazel, Inc.
+
+ The Mate Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The Mate 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.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the Mate Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+
+ Author: John Sullivan <[email protected]>,
+ */
+
+#include <config.h>
+#include "caja-keep-last-vertical-box.h"
+
+#include <eel/eel-gtk-macros.h>
+
+static void caja_keep_last_vertical_box_class_init (CajaKeepLastVerticalBoxClass *class);
+static void caja_keep_last_vertical_box_init (CajaKeepLastVerticalBox *box);
+static void caja_keep_last_vertical_box_size_allocate (GtkWidget *widget,
+ GtkAllocation *allocation);
+
+EEL_CLASS_BOILERPLATE (CajaKeepLastVerticalBox, caja_keep_last_vertical_box, GTK_TYPE_VBOX)
+
+/* Standard class initialization function */
+static void
+caja_keep_last_vertical_box_class_init (CajaKeepLastVerticalBoxClass *klass)
+{
+ GtkWidgetClass *widget_class;
+
+ widget_class = (GtkWidgetClass *) klass;
+
+ widget_class->size_allocate = caja_keep_last_vertical_box_size_allocate;
+}
+
+/* Standard object initialization function */
+static void
+caja_keep_last_vertical_box_init (CajaKeepLastVerticalBox *box)
+{
+}
+
+
+/* caja_keep_last_vertical_box_new:
+ *
+ * Create a new vertical box that clips off items from the end that don't
+ * fit, except the last item, which is always kept. When packing this widget
+ * into another vbox, use TRUE for expand and TRUE for fill or this class's
+ * special clipping magic won't work because this widget's allocation might
+ * be larger than the available space.
+ *
+ * @spacing: Vertical space between items.
+ *
+ * Return value: A new CajaKeepLastVerticalBox
+ */
+GtkWidget *
+caja_keep_last_vertical_box_new (gint spacing)
+{
+ CajaKeepLastVerticalBox *box;
+
+ box = CAJA_KEEP_LAST_VERTICAL_BOX (gtk_widget_new (caja_keep_last_vertical_box_get_type (), NULL));
+
+ gtk_box_set_spacing (GTK_BOX (box), spacing);
+
+ /* If homogeneous is TRUE and there are too many items to fit
+ * naturally, they will be squashed together to fit in the space.
+ * We want the ones that don't fit to be not shown at all, so
+ * we set homogeneous to FALSE.
+ */
+ gtk_box_set_homogeneous (GTK_BOX (box), FALSE);
+
+ return GTK_WIDGET (box);
+}
+
+static void
+caja_keep_last_vertical_box_size_allocate (GtkWidget *widget,
+ GtkAllocation *allocation)
+{
+ GtkBox *box;
+ GtkWidget *last_child, *child;
+ GList *children, *l;
+ GtkAllocation last_child_allocation, child_allocation, tiny_allocation;
+
+ g_return_if_fail (CAJA_IS_KEEP_LAST_VERTICAL_BOX (widget));
+ g_return_if_fail (allocation != NULL);
+
+ EEL_CALL_PARENT (GTK_WIDGET_CLASS, size_allocate, (widget, allocation));
+
+ box = GTK_BOX (widget);
+ children = gtk_container_get_children (GTK_CONTAINER(widget));
+ l = g_list_last (children);
+
+ if (l != NULL)
+ {
+ last_child = l->data;
+ l = l->prev;
+
+ gtk_widget_get_allocation (last_child, &last_child_allocation);
+
+ /* If last child doesn't fit vertically, prune items from the end of the
+ * list one at a time until it does.
+ */
+ if (last_child_allocation.y + last_child_allocation.height >
+ allocation->y + allocation->height)
+ {
+
+ while (l != NULL)
+ {
+ child = l->data;
+ l = l->prev;
+
+ gtk_widget_get_allocation (child, &child_allocation);
+
+ /* Reallocate this child's position so that it does not appear.
+ * Setting the width & height to 0 is not enough, as
+ * one pixel is still drawn. Must also move it outside
+ * visible range. For the cases I've seen, -1, -1 works fine.
+ * This might not work in all future cases. Alternatively, the
+ * items that don't fit could be hidden, but that would interfere
+ * with having other hidden children.
+ *
+ * Note that these children are having their size allocated twice,
+ * once by gtk_vbox_size_allocate and then again here. I don't
+ * know of any problems with this, but holler if you do.
+ */
+ tiny_allocation.x = tiny_allocation.y = -1;
+ tiny_allocation.height = tiny_allocation.width = 0;
+ gtk_widget_size_allocate (child, &tiny_allocation);
+
+ /* We're done if the special last item fits now. */
+ if (child_allocation.y + last_child_allocation.height <=
+ allocation->y + allocation->height)
+ {
+ last_child_allocation.y = child_allocation.y;
+ gtk_widget_size_allocate (last_child, &last_child_allocation);
+ break;
+ }
+
+ /* If the special last item still doesn't fit, but we've
+ * run out of earlier items, then the special last item is
+ * just too darn tall. Let's squash it down to fit in the box's
+ * allocation.
+ */
+ if (l == NULL)
+ {
+ last_child_allocation.y = allocation->y;
+ last_child_allocation.height = allocation->height;
+ gtk_widget_size_allocate (last_child, &last_child_allocation);
+ }
+ }
+ }
+ }
+ g_list_free (children);
+}
author	Perberos <[email protected]>	2011-12-01 22:24:23 -0300
committer	Perberos <[email protected]>	2011-12-01 22:24:23 -0300
commit	0e004c696b0e68b2cff37a4c3315b022a35eaf43 (patch)
tree	43261e815529cb9518ed7be37af13b846af8b26b /libcaja-private/caja-keep-last-vertical-box.c
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