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gtk2/gtk/gtkscrolledwindow.c
Lars Hamann 00fbbe68b0 removed vscrollbar, hscrollbar, vscrollbar_policy, hscrollbar_policy. 
Thu Nov  5 16:00:32 1998  Lars Hamann  <lars@gtk.org>

	* gtk/gtkclist.h (struct _GtkCList): removed vscrollbar, hscrollbar,
 	vscrollbar_policy, hscrollbar_policy. added h/vadjustment.

	* gtk/gtkclist.c (gtk_clist_class_init): added new args types
  	"hadjustment" & "vadjustment"
 	 (gtk_clist_set_arg) (gtk_clist_get_arg): new object class
  	set/get_arg functions
 	(gtk_clist_construct): don't create/adjust scrollbars.
 	(gtk_clist_set_hadjustment) (gtk_clist_set_vadjustment): new functions
 	to set h/vadjustments
  	(gtk_clist_get_vadjustment) (gtk_clist_get_hadjustment): new functions
 	to query h/vadjustments
 	(create_scrollbars): removed.
 	(create_adjustments): replacement for create_scrollbars
 	(gtk_clist_new): call gtk_clist_new_with_titles
 	(gtk_clist_new_with_titles): don't warn on titles == NULL
 	(move_horizontal): use CLAMP instead
 	(gtk_clist_set_policy): deprecated method.
  	use gtk_scrolled_window_set_policy instead.
 	(vadjustment_value_changed): use clist->vadj.
 	(adjust_scrollbars): renamed to adjust_adjustments
 	(adjust_adjustments): former adjust_scrollbars
 	(gtk_clist_destroy): unref adjustments
 	(gtk_clist_size_allocate) (gtk_clist_map) (title_focus)
  	(gtk_clist_unmap) (gtk_clist_size_request) (gtk_clist_focus)
  	(gtk_clist_size_allocate) (gtk_clist_forall): don't use scrollbars
 	(gtk_clist_thaw) (real_insert_row) (real_remove_row)
 	(gtk_clist_set_row_height) (real_resize_column):
 	call adjust_adjustments
 	(gtk_clist_moveto): return if clist has no adjustments yet.
 	(gtk_clist_parent_set): new GtkWidget::parent_set function.
 	Autogenerate h/vadjustments if needed.
 	(move_horizontal) (move_vertical): some cleanups

	* gtk/gtkviewport.c (gtk_viewport_set_arg) (gtk_viewport_new):
  	call only gtk_viewport_set_h/vadjustment and let these functions
  	do the work.
 	(gtk_viewport_set_hadjustment) (gtk_viewport_set_vadjustment):
 	generate a new adjustment if needed

	* gtk/gtkscrolledwindow.h ((struct _GtkScrolledWindow):
  	use a guint bitfield for h/vscrollbar_policy and h/vscrollbar_visible

	* gtk/gtkscrolledwindow.c (gtk_scrolled_window_adjustment_changed):
  	queue_resize if visibility of scrollbars changes
  	(gtk_scrolled_window_remove): only call container_remove with
  	scrolled_window->viewport automatically if viewport was autogenerated
 	(gtk_scrolled_window_add): add widget as scrolled_window->viewport.
 	auto create a viewport only if widget does not take h/vadjustments.
 	(gtk_scrolled_window_construct): don't generate a viewport
  	automatically.
 	(gtk_scrolled_window_forall): call callback with viewport in any case
 	(gtk_scrolled_window_set_arg): call gtk_container_add in case of
  	ARG_VIEWPORT
 	(gtk_scrolled_window_size_allocate) (gtk_scrolled_window_size_request)
 	(gtk_scrolled_window_map) (gtk_scrolled_window_unmap): check
  	viewport != NULL

	* gtk/testgtk.c
 	(create_ctree) (export_ctree) (create_clist): use a scrolled_window
  	in conjunction with clists/ctrees

	* gtk/gtkfilesel.c (gtk_file_selection_init): use a scrolled_window
 	in conjunction with clists

	* gtk/gtkfontsel.c (gtk_font_selection_init): use a scrolled_window
 	in conjunction with clists
1998-11-05 15:44:22 +00:00

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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 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 "gtkscrolledwindow.h"
#include "gtksignal.h"
#define SCROLLBAR_SPACING(w) (GTK_SCROLLED_WINDOW_CLASS (GTK_OBJECT (w)->klass)->scrollbar_spacing)
enum {
ARG_0,
ARG_VIEWPORT,
ARG_HSCROLLBAR_POLICY,
ARG_VSCROLLBAR_POLICY
};
static void gtk_scrolled_window_class_init (GtkScrolledWindowClass *klass);
static void gtk_scrolled_window_init (GtkScrolledWindow *scrolled_window);
static void gtk_scrolled_window_set_arg (GtkObject *object,
GtkArg *arg,
guint arg_id);
static void gtk_scrolled_window_get_arg (GtkObject *object,
GtkArg *arg,
guint arg_id);
static void gtk_scrolled_window_destroy (GtkObject *object);
static void gtk_scrolled_window_finalize (GtkObject *object);
static void gtk_scrolled_window_map (GtkWidget *widget);
static void gtk_scrolled_window_unmap (GtkWidget *widget);
static void gtk_scrolled_window_draw (GtkWidget *widget,
GdkRectangle *area);
static void gtk_scrolled_window_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_scrolled_window_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_scrolled_window_add (GtkContainer *container,
GtkWidget *widget);
static void gtk_scrolled_window_remove (GtkContainer *container,
GtkWidget *widget);
static void gtk_scrolled_window_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data);
static void gtk_scrolled_window_viewport_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_scrolled_window_adjustment_changed (GtkAdjustment *adjustment,
gpointer data);
static GtkContainerClass *parent_class = NULL;
GtkType
gtk_scrolled_window_get_type (void)
{
static GtkType scrolled_window_type = 0;
if (!scrolled_window_type)
{
GtkTypeInfo scrolled_window_info =
{
"GtkScrolledWindow",
sizeof (GtkScrolledWindow),
sizeof (GtkScrolledWindowClass),
(GtkClassInitFunc) gtk_scrolled_window_class_init,
(GtkObjectInitFunc) gtk_scrolled_window_init,
/* reserved_1 */ NULL,
/* reserved_2 */ NULL,
(GtkClassInitFunc) NULL,
};
scrolled_window_type = gtk_type_unique (GTK_TYPE_CONTAINER, &scrolled_window_info);
}
return scrolled_window_type;
}
static void
gtk_scrolled_window_class_init (GtkScrolledWindowClass *class)
{
GtkObjectClass *object_class;
GtkWidgetClass *widget_class;
GtkContainerClass *container_class;
object_class = (GtkObjectClass*) class;
widget_class = (GtkWidgetClass*) class;
container_class = (GtkContainerClass*) class;
parent_class = gtk_type_class (GTK_TYPE_CONTAINER);
gtk_object_add_arg_type ("GtkScrolledWindow::viewport",
GTK_TYPE_VIEWPORT,
GTK_ARG_READWRITE | GTK_ARG_CONSTRUCT,
ARG_VIEWPORT);
gtk_object_add_arg_type ("GtkScrolledWindow::hscrollbar_policy",
GTK_TYPE_POLICY_TYPE,
GTK_ARG_READWRITE,
ARG_HSCROLLBAR_POLICY);
gtk_object_add_arg_type ("GtkScrolledWindow::vscrollbar_policy",
GTK_TYPE_POLICY_TYPE,
GTK_ARG_READWRITE,
ARG_VSCROLLBAR_POLICY);
object_class->set_arg = gtk_scrolled_window_set_arg;
object_class->get_arg = gtk_scrolled_window_get_arg;
object_class->destroy = gtk_scrolled_window_destroy;
object_class->finalize = gtk_scrolled_window_finalize;
widget_class->map = gtk_scrolled_window_map;
widget_class->unmap = gtk_scrolled_window_unmap;
widget_class->draw = gtk_scrolled_window_draw;
widget_class->size_request = gtk_scrolled_window_size_request;
widget_class->size_allocate = gtk_scrolled_window_size_allocate;
container_class->add = gtk_scrolled_window_add;
container_class->remove = gtk_scrolled_window_remove;
container_class->forall = gtk_scrolled_window_forall;
class->scrollbar_spacing = 5;
}
static void
gtk_scrolled_window_set_arg (GtkObject *object,
GtkArg *arg,
guint arg_id)
{
GtkScrolledWindow *scrolled_window;
scrolled_window = GTK_SCROLLED_WINDOW (object);
switch (arg_id)
{
GtkWidget *viewport;
case ARG_VIEWPORT:
viewport = GTK_VALUE_POINTER (*arg);
gtk_container_add (GTK_CONTAINER (scrolled_window), viewport);
case ARG_HSCROLLBAR_POLICY:
gtk_scrolled_window_set_policy (scrolled_window,
GTK_VALUE_ENUM (*arg),
scrolled_window->vscrollbar_policy);
break;
case ARG_VSCROLLBAR_POLICY:
gtk_scrolled_window_set_policy (scrolled_window,
scrolled_window->hscrollbar_policy,
GTK_VALUE_ENUM (*arg));
break;
default:
break;
}
}
static void
gtk_scrolled_window_get_arg (GtkObject *object,
GtkArg *arg,
guint arg_id)
{
GtkScrolledWindow *scrolled_window;
scrolled_window = GTK_SCROLLED_WINDOW (object);
switch (arg_id)
{
case ARG_VIEWPORT:
GTK_VALUE_POINTER (*arg) = scrolled_window->viewport;
break;
case ARG_HSCROLLBAR_POLICY:
GTK_VALUE_ENUM (*arg) = scrolled_window->hscrollbar_policy;
break;
case ARG_VSCROLLBAR_POLICY:
GTK_VALUE_ENUM (*arg) = scrolled_window->vscrollbar_policy;
break;
default:
arg->type = GTK_TYPE_INVALID;
break;
}
}
static void
gtk_scrolled_window_init (GtkScrolledWindow *scrolled_window)
{
GTK_WIDGET_SET_FLAGS (scrolled_window, GTK_NO_WINDOW);
gtk_container_set_resize_mode (GTK_CONTAINER (scrolled_window), GTK_RESIZE_QUEUE);
scrolled_window->hscrollbar = NULL;
scrolled_window->vscrollbar = NULL;
scrolled_window->hscrollbar_policy = GTK_POLICY_ALWAYS;
scrolled_window->vscrollbar_policy = GTK_POLICY_ALWAYS;
scrolled_window->autogenerated_viewport = FALSE;
}
GtkWidget*
gtk_scrolled_window_new (GtkAdjustment *hadjustment,
GtkAdjustment *vadjustment)
{
GtkWidget *scrolled_window;
scrolled_window = gtk_type_new (GTK_TYPE_SCROLLED_WINDOW);
gtk_scrolled_window_construct (GTK_SCROLLED_WINDOW (scrolled_window), hadjustment, vadjustment);
return scrolled_window;
}
void
gtk_scrolled_window_construct (GtkScrolledWindow *scrolled_window,
GtkAdjustment *hadjustment,
GtkAdjustment *vadjustment)
{
g_return_if_fail (scrolled_window != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
g_return_if_fail (scrolled_window->hscrollbar == NULL);
g_return_if_fail (scrolled_window->vscrollbar == NULL);
scrolled_window->hscrollbar = gtk_hscrollbar_new (hadjustment);
scrolled_window->vscrollbar = gtk_vscrollbar_new (vadjustment);
hadjustment =
gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar));
vadjustment =
gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar));
gtk_signal_connect (GTK_OBJECT (hadjustment), "changed",
(GtkSignalFunc) gtk_scrolled_window_adjustment_changed,
(gpointer) scrolled_window);
gtk_signal_connect (GTK_OBJECT (vadjustment), "changed",
(GtkSignalFunc) gtk_scrolled_window_adjustment_changed,
(gpointer) scrolled_window);
gtk_widget_set_parent (scrolled_window->hscrollbar, GTK_WIDGET (scrolled_window));
gtk_widget_set_parent (scrolled_window->vscrollbar, GTK_WIDGET (scrolled_window));
gtk_widget_show (scrolled_window->hscrollbar);
gtk_widget_show (scrolled_window->vscrollbar);
gtk_widget_ref (scrolled_window->hscrollbar);
gtk_widget_ref (scrolled_window->vscrollbar);
}
GtkAdjustment*
gtk_scrolled_window_get_hadjustment (GtkScrolledWindow *scrolled_window)
{
g_return_val_if_fail (scrolled_window != NULL, NULL);
g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
return gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar));
}
GtkAdjustment*
gtk_scrolled_window_get_vadjustment (GtkScrolledWindow *scrolled_window)
{
g_return_val_if_fail (scrolled_window != NULL, NULL);
g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window), NULL);
return gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar));
}
void
gtk_scrolled_window_set_policy (GtkScrolledWindow *scrolled_window,
GtkPolicyType hscrollbar_policy,
GtkPolicyType vscrollbar_policy)
{
g_return_if_fail (scrolled_window != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
if ((scrolled_window->hscrollbar_policy != hscrollbar_policy) ||
(scrolled_window->vscrollbar_policy != vscrollbar_policy))
{
scrolled_window->hscrollbar_policy = hscrollbar_policy;
scrolled_window->vscrollbar_policy = vscrollbar_policy;
if (GTK_WIDGET (scrolled_window)->parent)
gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
}
}
static void
gtk_scrolled_window_destroy (GtkObject *object)
{
GtkScrolledWindow *scrolled_window;
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (object));
scrolled_window = GTK_SCROLLED_WINDOW (object);
gtk_widget_destroy (scrolled_window->viewport);
gtk_widget_destroy (scrolled_window->hscrollbar);
gtk_widget_destroy (scrolled_window->vscrollbar);
if (GTK_OBJECT_CLASS (parent_class)->destroy)
(* GTK_OBJECT_CLASS (parent_class)->destroy) (object);
}
static void
gtk_scrolled_window_finalize (GtkObject *object)
{
GtkScrolledWindow *scrolled_window;
scrolled_window = GTK_SCROLLED_WINDOW (object);
gtk_widget_unref (scrolled_window->viewport);
gtk_widget_unref (scrolled_window->hscrollbar);
gtk_widget_unref (scrolled_window->vscrollbar);
GTK_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gtk_scrolled_window_map (GtkWidget *widget)
{
GtkScrolledWindow *scrolled_window;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
if (!GTK_WIDGET_MAPPED (widget))
{
GTK_WIDGET_SET_FLAGS (widget, GTK_MAPPED);
scrolled_window = GTK_SCROLLED_WINDOW (widget);
if (scrolled_window->viewport &&
GTK_WIDGET_VISIBLE (scrolled_window->viewport) &&
!GTK_WIDGET_MAPPED (scrolled_window->viewport))
gtk_widget_map (scrolled_window->viewport);
if (GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar) &&
!GTK_WIDGET_MAPPED (scrolled_window->hscrollbar))
gtk_widget_map (scrolled_window->hscrollbar);
if (GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar) &&
!GTK_WIDGET_MAPPED (scrolled_window->vscrollbar))
gtk_widget_map (scrolled_window->vscrollbar);
}
}
static void
gtk_scrolled_window_unmap (GtkWidget *widget)
{
GtkScrolledWindow *scrolled_window;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
if (GTK_WIDGET_MAPPED (widget))
{
GTK_WIDGET_UNSET_FLAGS (widget, GTK_MAPPED);
scrolled_window = GTK_SCROLLED_WINDOW (widget);
if (scrolled_window->viewport &&
GTK_WIDGET_MAPPED (scrolled_window->viewport))
gtk_widget_unmap (scrolled_window->viewport);
if (GTK_WIDGET_MAPPED (scrolled_window->hscrollbar))
gtk_widget_unmap (scrolled_window->hscrollbar);
if (GTK_WIDGET_MAPPED (scrolled_window->vscrollbar))
gtk_widget_unmap (scrolled_window->vscrollbar);
}
}
static void
gtk_scrolled_window_draw (GtkWidget *widget,
GdkRectangle *area)
{
GtkScrolledWindow *scrolled_window;
GdkRectangle child_area;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
g_return_if_fail (area != NULL);
if (GTK_WIDGET_DRAWABLE (widget))
{
scrolled_window = GTK_SCROLLED_WINDOW (widget);
if (scrolled_window->viewport &&
gtk_widget_intersect (scrolled_window->viewport, area, &child_area))
gtk_widget_draw (scrolled_window->viewport, &child_area);
if (gtk_widget_intersect (scrolled_window->hscrollbar, area, &child_area))
gtk_widget_draw (scrolled_window->hscrollbar, &child_area);
if (gtk_widget_intersect (scrolled_window->vscrollbar, area, &child_area))
gtk_widget_draw (scrolled_window->vscrollbar, &child_area);
}
}
static void
gtk_scrolled_window_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkScrolledWindow *scrolled_window;
gint extra_height;
gint extra_width;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
g_return_if_fail (requisition != NULL);
scrolled_window = GTK_SCROLLED_WINDOW (widget);
requisition->width = 0;
requisition->height = 0;
if (scrolled_window->viewport &&
GTK_WIDGET_VISIBLE (scrolled_window->viewport))
{
gtk_widget_size_request (scrolled_window->viewport, &scrolled_window->viewport->requisition);
requisition->width += scrolled_window->viewport->requisition.width;
requisition->height += scrolled_window->viewport->requisition.height;
}
extra_width = 0;
extra_height = 0;
if ((scrolled_window->hscrollbar_policy == GTK_POLICY_AUTOMATIC) ||
GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar))
{
gtk_widget_size_request (scrolled_window->hscrollbar,
&scrolled_window->hscrollbar->requisition);
requisition->width = MAX (requisition->width, scrolled_window->hscrollbar->requisition.width);
extra_height = SCROLLBAR_SPACING (scrolled_window) + scrolled_window->hscrollbar->requisition.height;
}
if ((scrolled_window->vscrollbar_policy == GTK_POLICY_AUTOMATIC) ||
GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar))
{
gtk_widget_size_request (scrolled_window->vscrollbar,
&scrolled_window->vscrollbar->requisition);
requisition->height = MAX (requisition->height, scrolled_window->vscrollbar->requisition.height);
extra_width = SCROLLBAR_SPACING (scrolled_window) + scrolled_window->vscrollbar->requisition.width;
}
requisition->width += GTK_CONTAINER (widget)->border_width * 2 + extra_width;
requisition->height += GTK_CONTAINER (widget)->border_width * 2 + extra_height;
}
static void
gtk_scrolled_window_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkScrolledWindow *scrolled_window;
GtkAllocation viewport_allocation;
GtkAllocation child_allocation;
guint previous_hvis;
guint previous_vvis;
gint count;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
g_return_if_fail (allocation != NULL);
scrolled_window = GTK_SCROLLED_WINDOW (widget);
widget->allocation = *allocation;
if (scrolled_window->hscrollbar_policy == GTK_POLICY_ALWAYS)
scrolled_window->hscrollbar_visible = TRUE;
if (scrolled_window->vscrollbar_policy == GTK_POLICY_ALWAYS)
scrolled_window->vscrollbar_visible = TRUE;
if (scrolled_window->viewport &&
GTK_WIDGET_VISIBLE (scrolled_window->viewport))
{
count = 0;
do {
gtk_scrolled_window_viewport_allocate (widget, &viewport_allocation);
child_allocation.x = viewport_allocation.x + allocation->x;
child_allocation.y = viewport_allocation.y + allocation->y;
child_allocation.width = viewport_allocation.width;
child_allocation.height = viewport_allocation.height;
previous_hvis = scrolled_window->hscrollbar_visible;
previous_vvis = scrolled_window->vscrollbar_visible;
gtk_widget_size_allocate (scrolled_window->viewport, &child_allocation);
/* If, after the first iteration, the hscrollbar and the
* vscrollbar flip visiblity, then we need both.
*/
if ((count++) &&
(previous_hvis != scrolled_window->hscrollbar_visible) &&
(previous_vvis != scrolled_window->vscrollbar_visible))
{
scrolled_window->hscrollbar_visible = TRUE;
scrolled_window->vscrollbar_visible = TRUE;
break;
}
count++;
} while ((previous_hvis != scrolled_window->hscrollbar_visible) ||
(previous_vvis != scrolled_window->vscrollbar_visible));
}
if (scrolled_window->hscrollbar_visible)
{
if (!GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar))
gtk_widget_show (scrolled_window->hscrollbar);
child_allocation.x = viewport_allocation.x;
child_allocation.y = viewport_allocation.y + viewport_allocation.height + SCROLLBAR_SPACING (scrolled_window);
child_allocation.width = viewport_allocation.width;
child_allocation.height = scrolled_window->hscrollbar->requisition.height;
child_allocation.x += allocation->x;
child_allocation.y += allocation->y;
gtk_widget_size_allocate (scrolled_window->hscrollbar, &child_allocation);
}
else
{
if (GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar))
gtk_widget_hide (scrolled_window->hscrollbar);
}
if (scrolled_window->vscrollbar_visible)
{
if (!GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar))
gtk_widget_show (scrolled_window->vscrollbar);
child_allocation.x = viewport_allocation.x + viewport_allocation.width + SCROLLBAR_SPACING (scrolled_window);
child_allocation.y = viewport_allocation.y;
child_allocation.width = scrolled_window->vscrollbar->requisition.width;
child_allocation.height = viewport_allocation.height;
child_allocation.x += allocation->x;
child_allocation.y += allocation->y;
gtk_widget_size_allocate (scrolled_window->vscrollbar, &child_allocation);
}
else
{
if (GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar))
gtk_widget_hide (scrolled_window->vscrollbar);
}
}
static void
gtk_scrolled_window_add (GtkContainer *container,
GtkWidget *widget)
{
GtkScrolledWindow *scrolled_window;
GtkArgInfo *info_hadj;
GtkArgInfo *info_vadj;
GtkArg arg;
gchar *error;
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
g_return_if_fail (widget != NULL);
scrolled_window = GTK_SCROLLED_WINDOW (container);
if (scrolled_window->viewport)
gtk_container_remove (container, scrolled_window->viewport);
error = gtk_object_arg_get_info (GTK_OBJECT_TYPE (widget),
"hadjustment", &info_hadj);
if (!error)
{
error = gtk_object_arg_get_info (GTK_OBJECT_TYPE (widget),
"vadjustment", &info_vadj);
if (!error)
{
gtk_object_set (GTK_OBJECT (widget),
"hadjustment",
gtk_scrolled_window_get_hadjustment
(scrolled_window),
"vadjustment",
gtk_scrolled_window_get_vadjustment
(scrolled_window),
NULL);
scrolled_window->viewport = widget;
gtk_widget_set_parent (widget, GTK_WIDGET (scrolled_window));
gtk_widget_ref (widget);
scrolled_window->autogenerated_viewport = FALSE;
}
}
if (error)
{
g_free (error);
scrolled_window->viewport = gtk_viewport_new
(gtk_scrolled_window_get_hadjustment (scrolled_window),
gtk_scrolled_window_get_vadjustment (scrolled_window));
gtk_widget_set_parent (scrolled_window->viewport,
GTK_WIDGET (scrolled_window));
gtk_widget_ref (scrolled_window->viewport);
gtk_widget_show (scrolled_window->viewport);
scrolled_window->autogenerated_viewport = FALSE;
gtk_container_add (GTK_CONTAINER (scrolled_window->viewport), widget);
widget = scrolled_window->viewport;
}
if (GTK_WIDGET_VISIBLE (scrolled_window))
{
if (GTK_WIDGET_REALIZED (scrolled_window) &&
!GTK_WIDGET_REALIZED (widget))
gtk_widget_realize (widget);
if (GTK_WIDGET_MAPPED (scrolled_window) &&
!GTK_WIDGET_MAPPED (widget))
gtk_widget_map (widget);
}
if (GTK_WIDGET_VISIBLE (widget) && GTK_WIDGET_VISIBLE (scrolled_window))
gtk_widget_queue_resize (widget);
}
static void
gtk_scrolled_window_remove (GtkContainer *container,
GtkWidget *widget)
{
GtkScrolledWindow *scrolled_window;
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
g_return_if_fail (widget != NULL);
scrolled_window = GTK_SCROLLED_WINDOW (container);
if (scrolled_window->viewport == widget ||
scrolled_window->hscrollbar == widget ||
scrolled_window->vscrollbar == widget)
{
/* this happens during destroy */
if (scrolled_window->viewport == widget)
scrolled_window->autogenerated_viewport = FALSE;
gtk_widget_unparent (widget);
}
else if (scrolled_window->autogenerated_viewport)
gtk_container_remove (GTK_CONTAINER (scrolled_window->viewport), widget);
}
static void
gtk_scrolled_window_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data)
{
GtkScrolledWindow *scrolled_window;
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
g_return_if_fail (callback != NULL);
scrolled_window = GTK_SCROLLED_WINDOW (container);
if (scrolled_window->viewport)
(* callback) (scrolled_window->viewport, callback_data);
if (include_internals)
{
(* callback) (scrolled_window->vscrollbar, callback_data);
(* callback) (scrolled_window->hscrollbar, callback_data);
}
}
static void
gtk_scrolled_window_viewport_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkScrolledWindow *scrolled_window;
g_return_if_fail (widget != NULL);
g_return_if_fail (allocation != NULL);
scrolled_window = GTK_SCROLLED_WINDOW (widget);
allocation->x = GTK_CONTAINER (widget)->border_width;
allocation->y = GTK_CONTAINER (widget)->border_width;
allocation->width = MAX (1, widget->allocation.width - allocation->x * 2);
allocation->height = MAX (1, widget->allocation.height - allocation->y * 2);
if (scrolled_window->vscrollbar_visible)
allocation->width = MAX (1,
allocation->width - (scrolled_window->vscrollbar->requisition.width + SCROLLBAR_SPACING (scrolled_window)));
if (scrolled_window->hscrollbar_visible)
allocation->height = MAX (1,
allocation->height - (scrolled_window->hscrollbar->requisition.height + SCROLLBAR_SPACING (scrolled_window)));
}
static void
gtk_scrolled_window_adjustment_changed (GtkAdjustment *adjustment,
gpointer data)
{
GtkScrolledWindow *scrolled_win;
gboolean visible;
g_return_if_fail (adjustment != NULL);
g_return_if_fail (data != NULL);
scrolled_win = GTK_SCROLLED_WINDOW (data);
if (adjustment == gtk_range_get_adjustment (GTK_RANGE (scrolled_win->hscrollbar)))
{
if (scrolled_win->hscrollbar_policy == GTK_POLICY_AUTOMATIC)
{
visible = scrolled_win->hscrollbar_visible;
scrolled_win->hscrollbar_visible =
((adjustment->upper - adjustment->lower) > adjustment->page_size);
if (scrolled_win->hscrollbar_visible != visible)
gtk_widget_queue_resize (GTK_WIDGET (scrolled_win));
}
}
else if (adjustment == gtk_range_get_adjustment (GTK_RANGE (scrolled_win->vscrollbar)))
{
if (scrolled_win->vscrollbar_policy == GTK_POLICY_AUTOMATIC)
{
visible = scrolled_win->vscrollbar_visible;
scrolled_win->vscrollbar_visible =
((adjustment->upper - adjustment->lower) > adjustment->page_size);
if (scrolled_win->vscrollbar_visible != visible)
gtk_widget_queue_resize (GTK_WIDGET (scrolled_win));
}
}
else
{
g_warning ("could not determine which adjustment scrollbar received change signal for");
return;
}
}
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