060978e069
I submitted this patch twice to gtk-devel-list, and received no comments, so am committing it. Although not exhaustively tested, I have been using this gtk+ for a week w/o problems, and I did read the code to ensure that nothing ever writes to these data structures. If by chance people encounter SEGV's in gtk+ code that is setting values in global data structures, this patch could be a possible culprit. 1998-11-30 Elliot Lee <sopwith@cuc.ml.org> * {gdk,gtk}/*.c: Make read-only data structures "static const" to allow them to be shared, mainly including (but not limited to) the GtkTypeInfo structures for each class. * gtk/gtkfilesel.c: Add /net to the "leave me alone" directory listing.
296 lines
8.0 KiB
C
296 lines
8.0 KiB
C
/* 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., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
#include "gtkalignment.h"
|
|
|
|
|
|
enum {
|
|
ARG_0,
|
|
ARG_XALIGN,
|
|
ARG_YALIGN,
|
|
ARG_XSCALE,
|
|
ARG_YSCALE
|
|
};
|
|
|
|
|
|
static void gtk_alignment_class_init (GtkAlignmentClass *klass);
|
|
static void gtk_alignment_init (GtkAlignment *alignment);
|
|
static void gtk_alignment_size_request (GtkWidget *widget,
|
|
GtkRequisition *requisition);
|
|
static void gtk_alignment_size_allocate (GtkWidget *widget,
|
|
GtkAllocation *allocation);
|
|
static void gtk_alignment_set_arg (GtkObject *object,
|
|
GtkArg *arg,
|
|
guint arg_id);
|
|
static void gtk_alignment_get_arg (GtkObject *object,
|
|
GtkArg *arg,
|
|
guint arg_id);
|
|
|
|
|
|
|
|
GtkType
|
|
gtk_alignment_get_type (void)
|
|
{
|
|
static GtkType alignment_type = 0;
|
|
|
|
if (!alignment_type)
|
|
{
|
|
static const GtkTypeInfo alignment_info =
|
|
{
|
|
"GtkAlignment",
|
|
sizeof (GtkAlignment),
|
|
sizeof (GtkAlignmentClass),
|
|
(GtkClassInitFunc) gtk_alignment_class_init,
|
|
(GtkObjectInitFunc) gtk_alignment_init,
|
|
/* reserved_1 */ NULL,
|
|
/* reserved_2 */ NULL,
|
|
(GtkClassInitFunc) NULL,
|
|
};
|
|
|
|
alignment_type = gtk_type_unique (GTK_TYPE_BIN, &alignment_info);
|
|
}
|
|
|
|
return alignment_type;
|
|
}
|
|
|
|
static void
|
|
gtk_alignment_class_init (GtkAlignmentClass *class)
|
|
{
|
|
GtkObjectClass *object_class;
|
|
GtkWidgetClass *widget_class;
|
|
|
|
object_class = (GtkObjectClass*) class;
|
|
widget_class = (GtkWidgetClass*) class;
|
|
|
|
gtk_object_add_arg_type ("GtkAlignment::xalign", GTK_TYPE_FLOAT, GTK_ARG_READWRITE, ARG_XALIGN);
|
|
gtk_object_add_arg_type ("GtkAlignment::yalign", GTK_TYPE_FLOAT, GTK_ARG_READWRITE, ARG_YALIGN);
|
|
gtk_object_add_arg_type ("GtkAlignment::xscale", GTK_TYPE_FLOAT, GTK_ARG_READWRITE, ARG_XSCALE);
|
|
gtk_object_add_arg_type ("GtkAlignment::yscale", GTK_TYPE_FLOAT, GTK_ARG_READWRITE, ARG_YSCALE);
|
|
|
|
object_class->set_arg = gtk_alignment_set_arg;
|
|
object_class->get_arg = gtk_alignment_get_arg;
|
|
|
|
widget_class->size_request = gtk_alignment_size_request;
|
|
widget_class->size_allocate = gtk_alignment_size_allocate;
|
|
}
|
|
|
|
static void
|
|
gtk_alignment_init (GtkAlignment *alignment)
|
|
{
|
|
GTK_WIDGET_SET_FLAGS (alignment, GTK_NO_WINDOW);
|
|
|
|
alignment->xalign = 0.5;
|
|
alignment->yalign = 0.5;
|
|
alignment->xscale = 1.0;
|
|
alignment->yscale = 1.0;
|
|
}
|
|
|
|
GtkWidget*
|
|
gtk_alignment_new (gfloat xalign,
|
|
gfloat yalign,
|
|
gfloat xscale,
|
|
gfloat yscale)
|
|
{
|
|
GtkAlignment *alignment;
|
|
|
|
alignment = gtk_type_new (gtk_alignment_get_type ());
|
|
|
|
alignment->xalign = CLAMP (xalign, 0.0, 1.0);
|
|
alignment->yalign = CLAMP (yalign, 0.0, 1.0);
|
|
alignment->xscale = CLAMP (xscale, 0.0, 1.0);
|
|
alignment->yscale = CLAMP (yscale, 0.0, 1.0);
|
|
|
|
return GTK_WIDGET (alignment);
|
|
}
|
|
|
|
static void
|
|
gtk_alignment_set_arg (GtkObject *object,
|
|
GtkArg *arg,
|
|
guint arg_id)
|
|
{
|
|
GtkAlignment *alignment;
|
|
|
|
alignment = GTK_ALIGNMENT (object);
|
|
|
|
switch (arg_id)
|
|
{
|
|
case ARG_XALIGN:
|
|
gtk_alignment_set (alignment,
|
|
GTK_VALUE_FLOAT (*arg),
|
|
alignment->yalign,
|
|
alignment->xscale,
|
|
alignment->yscale);
|
|
break;
|
|
case ARG_YALIGN:
|
|
gtk_alignment_set (alignment,
|
|
alignment->xalign,
|
|
GTK_VALUE_FLOAT (*arg),
|
|
alignment->xscale,
|
|
alignment->yscale);
|
|
break;
|
|
case ARG_XSCALE:
|
|
gtk_alignment_set (alignment,
|
|
alignment->xalign,
|
|
alignment->yalign,
|
|
GTK_VALUE_FLOAT (*arg),
|
|
alignment->yscale);
|
|
break;
|
|
case ARG_YSCALE:
|
|
gtk_alignment_set (alignment,
|
|
alignment->xalign,
|
|
alignment->yalign,
|
|
alignment->xscale,
|
|
GTK_VALUE_FLOAT (*arg));
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gtk_alignment_get_arg (GtkObject *object,
|
|
GtkArg *arg,
|
|
guint arg_id)
|
|
{
|
|
GtkAlignment *alignment;
|
|
|
|
alignment = GTK_ALIGNMENT (object);
|
|
|
|
switch (arg_id)
|
|
{
|
|
case ARG_XALIGN:
|
|
GTK_VALUE_FLOAT (*arg) = alignment->xalign;
|
|
break;
|
|
case ARG_YALIGN:
|
|
GTK_VALUE_FLOAT (*arg) = alignment->yalign;
|
|
break;
|
|
case ARG_XSCALE:
|
|
GTK_VALUE_FLOAT (*arg) = alignment->xscale;
|
|
break;
|
|
case ARG_YSCALE:
|
|
GTK_VALUE_FLOAT (*arg) = alignment->yscale;
|
|
break;
|
|
default:
|
|
arg->type = GTK_TYPE_INVALID;
|
|
break;
|
|
}
|
|
}
|
|
|
|
void
|
|
gtk_alignment_set (GtkAlignment *alignment,
|
|
gfloat xalign,
|
|
gfloat yalign,
|
|
gfloat xscale,
|
|
gfloat yscale)
|
|
{
|
|
g_return_if_fail (alignment != NULL);
|
|
g_return_if_fail (GTK_IS_ALIGNMENT (alignment));
|
|
|
|
xalign = CLAMP (xalign, 0.0, 1.0);
|
|
yalign = CLAMP (yalign, 0.0, 1.0);
|
|
xscale = CLAMP (xscale, 0.0, 1.0);
|
|
yscale = CLAMP (yscale, 0.0, 1.0);
|
|
|
|
if ((alignment->xalign != xalign) ||
|
|
(alignment->yalign != yalign) ||
|
|
(alignment->xscale != xscale) ||
|
|
(alignment->yscale != yscale))
|
|
{
|
|
alignment->xalign = xalign;
|
|
alignment->yalign = yalign;
|
|
alignment->xscale = xscale;
|
|
alignment->yscale = yscale;
|
|
|
|
gtk_widget_size_allocate (GTK_WIDGET (alignment), &(GTK_WIDGET (alignment)->allocation));
|
|
gtk_widget_queue_draw (GTK_WIDGET (alignment));
|
|
}
|
|
}
|
|
|
|
|
|
static void
|
|
gtk_alignment_size_request (GtkWidget *widget,
|
|
GtkRequisition *requisition)
|
|
{
|
|
GtkAlignment *alignment;
|
|
GtkBin *bin;
|
|
|
|
g_return_if_fail (widget != NULL);
|
|
g_return_if_fail (GTK_IS_ALIGNMENT (widget));
|
|
g_return_if_fail (requisition != NULL);
|
|
|
|
alignment = GTK_ALIGNMENT (widget);
|
|
bin = GTK_BIN (widget);
|
|
|
|
requisition->width = GTK_CONTAINER (widget)->border_width * 2;
|
|
requisition->height = GTK_CONTAINER (widget)->border_width * 2;
|
|
|
|
if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
|
|
{
|
|
gtk_widget_size_request (bin->child, &bin->child->requisition);
|
|
|
|
requisition->width += bin->child->requisition.width;
|
|
requisition->height += bin->child->requisition.height;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gtk_alignment_size_allocate (GtkWidget *widget,
|
|
GtkAllocation *allocation)
|
|
{
|
|
GtkAlignment *alignment;
|
|
GtkBin *bin;
|
|
GtkAllocation child_allocation;
|
|
gint width, height;
|
|
gint x, y;
|
|
|
|
g_return_if_fail (widget != NULL);
|
|
g_return_if_fail (GTK_IS_ALIGNMENT (widget));
|
|
g_return_if_fail (allocation != NULL);
|
|
|
|
widget->allocation = *allocation;
|
|
alignment = GTK_ALIGNMENT (widget);
|
|
bin = GTK_BIN (widget);
|
|
|
|
if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
|
|
{
|
|
x = GTK_CONTAINER (alignment)->border_width;
|
|
y = GTK_CONTAINER (alignment)->border_width;
|
|
width = MAX (allocation->width - 2 * x, 0);
|
|
height = MAX (allocation->height - 2 * y, 0);
|
|
|
|
if (width > bin->child->requisition.width)
|
|
child_allocation.width = (bin->child->requisition.width *
|
|
(1.0 - alignment->xscale) +
|
|
width * alignment->xscale);
|
|
else
|
|
child_allocation.width = width;
|
|
|
|
if (height > bin->child->requisition.height)
|
|
child_allocation.height = (bin->child->requisition.height *
|
|
(1.0 - alignment->yscale) +
|
|
height * alignment->yscale);
|
|
else
|
|
child_allocation.height = height;
|
|
|
|
child_allocation.x = alignment->xalign * (width - child_allocation.width) + allocation->x + x;
|
|
child_allocation.y = alignment->yalign * (height - child_allocation.height) + allocation->y + y;
|
|
|
|
gtk_widget_size_allocate (bin->child, &child_allocation);
|
|
}
|
|
}
|