gtk2/gtk/gtkvbox.c

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/* GTK - The GIMP Toolkit
* 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 Lesser General Public
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* 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
* Lesser General Public License for more details.
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*
* 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.
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*/
/*
* 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/.
*/
#include <config.h>
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#include "gtkvbox.h"
#include "gtkintl.h"
#include "gtkalias.h"
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static void gtk_vbox_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_vbox_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
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G_DEFINE_TYPE (GtkVBox, gtk_vbox, GTK_TYPE_BOX);
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static void
gtk_vbox_class_init (GtkVBoxClass *class)
{
GtkWidgetClass *widget_class;
widget_class = (GtkWidgetClass*) class;
widget_class->size_request = gtk_vbox_size_request;
widget_class->size_allocate = gtk_vbox_size_allocate;
}
static void
gtk_vbox_init (GtkVBox *vbox)
{
}
GtkWidget*
gtk_vbox_new (gboolean homogeneous,
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gint spacing)
{
GtkVBox *vbox;
vbox = g_object_new (GTK_TYPE_VBOX, NULL);
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GTK_BOX (vbox)->spacing = spacing;
GTK_BOX (vbox)->homogeneous = homogeneous ? TRUE : FALSE;
return GTK_WIDGET (vbox);
}
static void
gtk_vbox_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkBox *box;
GtkBoxChild *child;
GtkRequisition child_requisition;
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GList *children;
gint nvis_children;
gint height;
box = GTK_BOX (widget);
requisition->width = 0;
requisition->height = 0;
nvis_children = 0;
children = box->children;
while (children)
{
child = children->data;
children = children->next;
if (GTK_WIDGET_VISIBLE (child->widget))
{
gtk_widget_size_request (child->widget, &child_requisition);
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if (box->homogeneous)
{
height = child_requisition.height + child->padding * 2;
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requisition->height = MAX (requisition->height, height);
}
else
{
requisition->height += child_requisition.height + child->padding * 2;
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}
requisition->width = MAX (requisition->width, child_requisition.width);
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nvis_children += 1;
}
}
if (nvis_children > 0)
{
if (box->homogeneous)
requisition->height *= nvis_children;
requisition->height += (nvis_children - 1) * box->spacing;
}
requisition->width += GTK_CONTAINER (box)->border_width * 2;
requisition->height += GTK_CONTAINER (box)->border_width * 2;
}
static void
gtk_vbox_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkBox *box;
GtkBoxChild *child;
GList *children;
GtkAllocation child_allocation;
gint nvis_children;
gint nexpand_children;
gint child_height;
gint height;
gint extra;
gint y;
box = GTK_BOX (widget);
widget->allocation = *allocation;
nvis_children = 0;
nexpand_children = 0;
children = box->children;
while (children)
{
child = children->data;
children = children->next;
if (GTK_WIDGET_VISIBLE (child->widget))
{
nvis_children += 1;
if (child->expand)
nexpand_children += 1;
}
}
if (nvis_children > 0)
{
if (box->homogeneous)
{
height = (allocation->height -
GTK_CONTAINER (box)->border_width * 2 -
(nvis_children - 1) * box->spacing);
extra = height / nvis_children;
}
else if (nexpand_children > 0)
{
height = (gint) allocation->height - (gint) widget->requisition.height;
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extra = height / nexpand_children;
}
else
{
height = 0;
extra = 0;
}
y = allocation->y + GTK_CONTAINER (box)->border_width;
child_allocation.x = allocation->x + GTK_CONTAINER (box)->border_width;
child_allocation.width = MAX (1, (gint) allocation->width - (gint) GTK_CONTAINER (box)->border_width * 2);
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children = box->children;
while (children)
{
child = children->data;
children = children->next;
if ((child->pack == GTK_PACK_START) && GTK_WIDGET_VISIBLE (child->widget))
{
if (box->homogeneous)
{
if (nvis_children == 1)
child_height = height;
else
child_height = extra;
nvis_children -= 1;
height -= extra;
}
else
{
GtkRequisition child_requisition;
gtk_widget_get_child_requisition (child->widget, &child_requisition);
child_height = child_requisition.height + child->padding * 2;
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if (child->expand)
{
if (nexpand_children == 1)
child_height += height;
else
child_height += extra;
nexpand_children -= 1;
height -= extra;
}
}
if (child->fill)
{
child_allocation.height = MAX (1, child_height - (gint)child->padding * 2);
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child_allocation.y = y + child->padding;
}
else
{
GtkRequisition child_requisition;
gtk_widget_get_child_requisition (child->widget, &child_requisition);
child_allocation.height = child_requisition.height;
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child_allocation.y = y + (child_height - child_allocation.height) / 2;
}
gtk_widget_size_allocate (child->widget, &child_allocation);
y += child_height + box->spacing;
}
}
y = allocation->y + allocation->height - GTK_CONTAINER (box)->border_width;
children = box->children;
while (children)
{
child = children->data;
children = children->next;
if ((child->pack == GTK_PACK_END) && GTK_WIDGET_VISIBLE (child->widget))
{
GtkRequisition child_requisition;
gtk_widget_get_child_requisition (child->widget, &child_requisition);
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if (box->homogeneous)
{
if (nvis_children == 1)
child_height = height;
else
child_height = extra;
nvis_children -= 1;
height -= extra;
}
else
{
child_height = child_requisition.height + child->padding * 2;
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if (child->expand)
{
if (nexpand_children == 1)
child_height += height;
else
child_height += extra;
nexpand_children -= 1;
height -= extra;
}
}
if (child->fill)
{
child_allocation.height = MAX (1, child_height - (gint)child->padding * 2);
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child_allocation.y = y + child->padding - child_height;
}
else
{
child_allocation.height = child_requisition.height;
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child_allocation.y = y + (child_height - child_allocation.height) / 2 - child_height;
}
gtk_widget_size_allocate (child->widget, &child_allocation);
y -= (child_height + box->spacing);
}
}
}
}
#define __GTK_VBOX_C__
#include "gtkaliasdef.c"