gtk2/gtk/gtkvbox.c

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1997-11-24 22:37:52 +00:00
/* 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 Library 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.
*
* 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.
*/
#include "gtkvbox.h"
static void gtk_vbox_class_init (GtkVBoxClass *klass);
static void gtk_vbox_init (GtkVBox *box);
static void gtk_vbox_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_vbox_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
guint
gtk_vbox_get_type ()
{
static guint vbox_type = 0;
if (!vbox_type)
{
GtkTypeInfo vbox_info =
{
"GtkVBox",
sizeof (GtkVBox),
sizeof (GtkVBoxClass),
(GtkClassInitFunc) gtk_vbox_class_init,
(GtkObjectInitFunc) gtk_vbox_init,
(GtkArgFunc) NULL,
};
vbox_type = gtk_type_unique (gtk_box_get_type (), &vbox_info);
}
return vbox_type;
}
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 (gint homogeneous,
gint spacing)
{
GtkVBox *vbox;
vbox = gtk_type_new (gtk_vbox_get_type ());
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;
GList *children;
gint nvis_children;
gint height;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_VBOX (widget));
g_return_if_fail (requisition != NULL);
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->widget->requisition);
if (box->homogeneous)
{
height = child->widget->requisition.height + child->padding * 2;
requisition->height = MAX (requisition->height, height);
}
else
{
requisition->height += child->widget->requisition.height + child->padding * 2;
}
requisition->width = MAX (requisition->width, child->widget->requisition.width);
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;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_VBOX (widget));
g_return_if_fail (allocation != NULL);
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 = allocation->height - widget->requisition.height;
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 = allocation->width - GTK_CONTAINER (box)->border_width * 2;
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
{
child_height = child->widget->requisition.height + child->padding * 2;
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 = child_height - child->padding * 2;
child_allocation.y = y + child->padding;
}
else
{
child_allocation.height = child->widget->requisition.height;
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))
{
if (box->homogeneous)
{
if (nvis_children == 1)
child_height = height;
else
child_height = extra;
nvis_children -= 1;
height -= extra;
}
else
{
child_height = child->widget->requisition.height + child->padding * 2;
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 = child_height - child->padding * 2;
child_allocation.y = y + child->padding - child_height;
}
else
{
child_allocation.height = child->widget->requisition.height;
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);
}
}
}
}