331 lines
8.3 KiB
C
331 lines
8.3 KiB
C
/* GTK - The GIMP Toolkit
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* Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/*
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* Modified by the GTK+ Team and others 1997-2000. See the AUTHORS
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* file for a list of people on the GTK+ Team. See the ChangeLog
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* files for a list of changes. These files are distributed with
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* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
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*/
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#include "gtkhbox.h"
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static void gtk_hbox_class_init (GtkHBoxClass *klass);
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static void gtk_hbox_init (GtkHBox *box);
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static void gtk_hbox_size_request (GtkWidget *widget,
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GtkRequisition *requisition);
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static void gtk_hbox_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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GtkType
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gtk_hbox_get_type (void)
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{
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static GtkType hbox_type = 0;
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if (!hbox_type)
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{
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static const GtkTypeInfo hbox_info =
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{
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"GtkHBox",
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sizeof (GtkHBox),
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sizeof (GtkHBoxClass),
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(GtkClassInitFunc) gtk_hbox_class_init,
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(GtkObjectInitFunc) gtk_hbox_init,
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/* reserved_1 */ NULL,
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/* reserved_2 */ NULL,
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(GtkClassInitFunc) NULL,
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};
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hbox_type = gtk_type_unique (GTK_TYPE_BOX, &hbox_info);
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}
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return hbox_type;
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}
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static void
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gtk_hbox_class_init (GtkHBoxClass *class)
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{
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GtkWidgetClass *widget_class;
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widget_class = (GtkWidgetClass*) class;
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widget_class->size_request = gtk_hbox_size_request;
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widget_class->size_allocate = gtk_hbox_size_allocate;
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}
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static void
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gtk_hbox_init (GtkHBox *hbox)
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{
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}
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GtkWidget*
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gtk_hbox_new (gboolean homogeneous,
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gint spacing)
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{
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GtkHBox *hbox;
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hbox = gtk_type_new (gtk_hbox_get_type ());
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GTK_BOX (hbox)->spacing = spacing;
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GTK_BOX (hbox)->homogeneous = homogeneous ? TRUE : FALSE;
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return GTK_WIDGET (hbox);
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}
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static void
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gtk_hbox_size_request (GtkWidget *widget,
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GtkRequisition *requisition)
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{
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GtkBox *box;
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GtkBoxChild *child;
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GList *children;
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gint nvis_children;
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gint width;
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box = GTK_BOX (widget);
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requisition->width = 0;
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requisition->height = 0;
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nvis_children = 0;
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children = box->children;
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while (children)
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{
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child = children->data;
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children = children->next;
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if (GTK_WIDGET_VISIBLE (child->widget))
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{
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GtkRequisition child_requisition;
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gtk_widget_size_request (child->widget, &child_requisition);
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if (box->homogeneous)
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{
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width = child_requisition.width + child->padding * 2;
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requisition->width = MAX (requisition->width, width);
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}
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else
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{
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requisition->width += child_requisition.width + child->padding * 2;
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}
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requisition->height = MAX (requisition->height, child_requisition.height);
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nvis_children += 1;
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}
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}
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if (nvis_children > 0)
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{
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if (box->homogeneous)
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requisition->width *= nvis_children;
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requisition->width += (nvis_children - 1) * box->spacing;
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}
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requisition->width += GTK_CONTAINER (box)->border_width * 2;
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requisition->height += GTK_CONTAINER (box)->border_width * 2;
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}
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static void
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gtk_hbox_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation)
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{
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GtkBox *box;
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GtkBoxChild *child;
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GList *children;
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GtkAllocation child_allocation;
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gint nvis_children;
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gint nexpand_children;
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gint child_width;
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gint width;
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gint extra;
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gint x;
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GtkTextDirection direction;
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box = GTK_BOX (widget);
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widget->allocation = *allocation;
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direction = gtk_widget_get_direction (widget);
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nvis_children = 0;
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nexpand_children = 0;
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children = box->children;
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while (children)
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{
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child = children->data;
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children = children->next;
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if (GTK_WIDGET_VISIBLE (child->widget))
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{
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nvis_children += 1;
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if (child->expand)
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nexpand_children += 1;
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}
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}
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if (nvis_children > 0)
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{
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if (box->homogeneous)
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{
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width = (allocation->width -
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GTK_CONTAINER (box)->border_width * 2 -
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(nvis_children - 1) * box->spacing);
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extra = width / nvis_children;
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}
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else if (nexpand_children > 0)
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{
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width = (gint) allocation->width - (gint) widget->requisition.width;
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extra = width / nexpand_children;
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}
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else
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{
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width = 0;
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extra = 0;
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}
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x = allocation->x + GTK_CONTAINER (box)->border_width;
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child_allocation.y = allocation->y + GTK_CONTAINER (box)->border_width;
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child_allocation.height = MAX (1, (gint) allocation->height - (gint) GTK_CONTAINER (box)->border_width * 2);
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children = box->children;
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while (children)
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{
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child = children->data;
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children = children->next;
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if ((child->pack == GTK_PACK_START) && GTK_WIDGET_VISIBLE (child->widget))
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{
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if (box->homogeneous)
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{
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if (nvis_children == 1)
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child_width = width;
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else
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child_width = extra;
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nvis_children -= 1;
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width -= extra;
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}
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else
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{
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GtkRequisition child_requisition;
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gtk_widget_get_child_requisition (child->widget, &child_requisition);
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child_width = child_requisition.width + child->padding * 2;
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if (child->expand)
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{
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if (nexpand_children == 1)
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child_width += width;
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else
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child_width += extra;
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nexpand_children -= 1;
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width -= extra;
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}
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}
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if (child->fill)
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{
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child_allocation.width = MAX (1, (gint) child_width - (gint) child->padding * 2);
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child_allocation.x = x + child->padding;
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}
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else
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{
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GtkRequisition child_requisition;
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gtk_widget_get_child_requisition (child->widget, &child_requisition);
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child_allocation.width = child_requisition.width;
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child_allocation.x = x + (child_width - child_allocation.width) / 2;
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}
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if (direction == GTK_TEXT_DIR_RTL)
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child_allocation.x = allocation->x + allocation->width - (child_allocation.x - allocation->x) - child_allocation.width;
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gtk_widget_size_allocate (child->widget, &child_allocation);
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x += child_width + box->spacing;
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}
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}
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x = allocation->x + allocation->width - GTK_CONTAINER (box)->border_width;
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children = box->children;
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while (children)
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{
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child = children->data;
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children = children->next;
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if ((child->pack == GTK_PACK_END) && GTK_WIDGET_VISIBLE (child->widget))
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{
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GtkRequisition child_requisition;
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gtk_widget_get_child_requisition (child->widget, &child_requisition);
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if (box->homogeneous)
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{
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if (nvis_children == 1)
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child_width = width;
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else
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child_width = extra;
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nvis_children -= 1;
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width -= extra;
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}
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else
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{
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child_width = child_requisition.width + child->padding * 2;
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if (child->expand)
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{
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if (nexpand_children == 1)
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child_width += width;
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else
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child_width += extra;
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nexpand_children -= 1;
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width -= extra;
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}
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}
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if (child->fill)
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{
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child_allocation.width = MAX (1, (gint)child_width - (gint)child->padding * 2);
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child_allocation.x = x + child->padding - child_width;
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}
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else
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{
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child_allocation.width = child_requisition.width;
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child_allocation.x = x + (child_width - child_allocation.width) / 2 - child_width;
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}
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if (direction == GTK_TEXT_DIR_RTL)
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child_allocation.x = allocation->x + allocation->width - (child_allocation.x - allocation->x) - child_allocation.width;
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gtk_widget_size_allocate (child->widget, &child_allocation);
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x -= (child_width + box->spacing);
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}
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}
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}
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}
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