270 lines
6.6 KiB
C
270 lines
6.6 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 Library 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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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the Free
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* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "gtkhbbox.h"
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static void gtk_hbutton_box_class_init (GtkHButtonBoxClass *klass);
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static void gtk_hbutton_box_init (GtkHButtonBox *box);
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static void gtk_hbutton_box_size_request (GtkWidget *widget,
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GtkRequisition *requisition);
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static void gtk_hbutton_box_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation);
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static gint default_spacing = 30;
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static gint default_layout_style = GTK_BUTTONBOX_EDGE;
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guint
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gtk_hbutton_box_get_type ()
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{
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static guint hbutton_box_type = 0;
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if (!hbutton_box_type)
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{
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GtkTypeInfo hbutton_box_info =
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{
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"GtkHButtonBox",
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sizeof (GtkHButtonBox),
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sizeof (GtkHButtonBoxClass),
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(GtkClassInitFunc) gtk_hbutton_box_class_init,
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(GtkObjectInitFunc) gtk_hbutton_box_init,
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(GtkArgFunc) NULL,
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};
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hbutton_box_type = gtk_type_unique (gtk_button_box_get_type (), &hbutton_box_info);
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}
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return hbutton_box_type;
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}
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static void
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gtk_hbutton_box_class_init (GtkHButtonBoxClass *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_hbutton_box_size_request;
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widget_class->size_allocate = gtk_hbutton_box_size_allocate;
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}
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static void
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gtk_hbutton_box_init (GtkHButtonBox *hbutton_box)
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{
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/* button_box_init has done everything allready */
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}
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GtkWidget*
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gtk_hbutton_box_new ()
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{
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GtkHButtonBox *hbutton_box;
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hbutton_box = gtk_type_new (gtk_hbutton_box_get_type ());
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return GTK_WIDGET (hbutton_box);
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}
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/* set default value for spacing */
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void gtk_hbutton_box_set_spacing_default (gint spacing)
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{
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default_spacing = spacing;
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}
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/* set default value for layout style */
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void gtk_hbutton_box_set_layout_default (gint layout)
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{
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default_layout_style = layout;
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}
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/* get default value for spacing */
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gint gtk_hbutton_box_get_spacing_default (void)
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{
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return default_spacing;
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}
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/* get default value for layout style */
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gint gtk_hbutton_box_get_layout_default (void)
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{
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return default_layout_style;
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}
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static void
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gtk_hbutton_box_size_request (GtkWidget *widget,
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GtkRequisition *requisition)
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{
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GtkBox *box;
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GtkButtonBox *bbox;
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gint nvis_children;
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gint child_width;
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gint child_height;
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gint spacing;
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gint layout;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_HBUTTON_BOX (widget));
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g_return_if_fail (requisition != NULL);
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box = GTK_BOX (widget);
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bbox = GTK_BUTTON_BOX (widget);
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spacing = bbox->spacing != GTK_BUTTONBOX_DEFAULT
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? bbox->spacing : default_spacing;
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layout = bbox->layout_style != GTK_BUTTONBOX_DEFAULT
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? bbox->layout_style : default_layout_style;
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gtk_button_box_child_requisition (widget,
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&nvis_children,
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&child_width,
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&child_height);
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if (nvis_children == 0)
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{
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requisition->width = 0;
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requisition->height = 0;
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}
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else
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{
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switch (layout)
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{
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case GTK_BUTTONBOX_SPREAD:
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requisition->width =
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nvis_children*child_width + ((nvis_children+1)*spacing);
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break;
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case GTK_BUTTONBOX_EDGE:
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case GTK_BUTTONBOX_START:
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case GTK_BUTTONBOX_END:
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requisition->width = nvis_children*child_width + ((nvis_children-1)*spacing);
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break;
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default:
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g_assert_not_reached();
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break;
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}
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requisition->height = child_height;
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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_hbutton_box_size_allocate (GtkWidget *widget,
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GtkAllocation *allocation)
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{
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GtkButtonBox *box;
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GtkHButtonBox *hbox;
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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 child_width;
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gint child_height;
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gint x = 0;
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gint y = 0;
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gint width;
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gint childspace;
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gint childspacing = 0;
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gint layout;
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gint spacing;
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g_return_if_fail (widget != NULL);
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g_return_if_fail (GTK_IS_HBUTTON_BOX (widget));
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g_return_if_fail (allocation != NULL);
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box = GTK_BUTTON_BOX (widget);
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hbox = GTK_HBUTTON_BOX (widget);
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spacing = box->spacing != GTK_BUTTONBOX_DEFAULT
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? box->spacing : default_spacing;
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layout = box->layout_style != GTK_BUTTONBOX_DEFAULT
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? box->layout_style : default_layout_style;
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gtk_button_box_child_requisition (widget,
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&nvis_children,
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&child_width,
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&child_height);
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widget->allocation = *allocation;
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width = allocation->width - GTK_CONTAINER (box)->border_width*2;
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switch (layout)
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{
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case GTK_BUTTONBOX_SPREAD:
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childspacing = (width - (nvis_children*child_width)) / (nvis_children+1);
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x = allocation->x + GTK_CONTAINER (box)->border_width + childspacing;
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break;
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case GTK_BUTTONBOX_EDGE:
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if (nvis_children >= 2)
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{
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childspacing =
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(width - (nvis_children*child_width)) / (nvis_children-1);
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x = allocation->x + GTK_CONTAINER (box)->border_width;
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}
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else
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{
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/* one or zero children, just center */
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childspacing = width;
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x = allocation->x + (allocation->width - child_width) / 2;
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}
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break;
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case GTK_BUTTONBOX_START:
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childspacing = spacing;
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x = allocation->x + GTK_CONTAINER (box)->border_width;
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break;
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case GTK_BUTTONBOX_END:
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childspacing = spacing;
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x = allocation->x + allocation->width - child_width * nvis_children
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- spacing *(nvis_children-1)
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- GTK_CONTAINER (box)->border_width;
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break;
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default:
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g_assert_not_reached();
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break;
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}
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y = allocation->y + (allocation->height - child_height) / 2;
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childspace = child_width + childspacing;
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children = GTK_BOX (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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child_allocation.width = child_width;
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child_allocation.height = child_height;
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child_allocation.x = x;
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child_allocation.y = y;
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gtk_widget_size_allocate (child->widget, &child_allocation);
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x += childspace;
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}
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}
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}
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