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gtk2/gtk/gtkscrolledwindow.c
Tim Janik 9595c55184 documented necessary changes for 1.4 transition. 
Fri May 12 17:13:32 2000  Tim Janik  <timj@gtk.org>

	* docs/Changes-1.4.txt: documented necessary changes for 1.4 transition.

	* gtk/gtktext.c: made the adjustments no-construct args, simply
	provide default adjustments.
	(gtk_text_destroy): release adjustments.

	* gtk/gtkprogressbar.c (gtk_progress_bar_class_init): made the
	adjustment argument non-construct.

	* gtk/gtkprogress.c (gtk_progress_destroy): release adjustment here,
	instead of in finalize.
	(gtk_progress_get_text_from_value):
	(gtk_progress_get_current_text):
	(gtk_progress_set_value):
	(gtk_progress_get_percentage_from_value):
	(gtk_progress_get_current_percentage):
	(gtk_progress_set_percentage):
	(gtk_progress_configure): ensure an adjustment is present.

Thu May 11 01:24:08 2000  Tim Janik  <timj@gtk.org>

	* gtk/gtkcolorsel.[hc]:
	* gtk/gtkcolorseldialog.[hc]:
	* gtk/gtkhsv.[hc]: major code cleanups, destroy handlers need to chain
	their parent implementation, use bit fields for boolean values, don't
	create unused widgets, usage of glib types, braces go on their own
	lines, function argument alignment, #include directives etc. etc. etc..

	* gtk/Makefile.am (gtk_public_h_sources): install gtkhsv.h.

Wed May 10 23:29:52 2000  Tim Janik  <timj@gtk.org>

	* gtk/gtktoolbar.c (gtk_toolbar_destroy): don't unref a NULL tooltips.

	* gtk/gtkfilesel.c (gtk_file_selection_destroy): don't free a cmpl_state
	of NULL.

	* gtk/gtkcombo.c (gtk_combo_item_destroy): don#t keep references
	to freed data.
	(gtk_combo_destroy): don't keep a pointer to a destroyed window.

	* gtk/gtkmenu.c (gtk_menu_init): reset the menu's toplevel pointer
	to NULL when the toplevel is getting destroyed.
	(gtk_menu_set_tearoff_state): same here for the tearoff_window.
	(gtk_menu_destroy):
	(gtk_menu_init): store the information of whether we have to
	readd the initial child ref_count during destruction in a new
	GtkMenu field needs_destruction_ref_count.

	* gtk/gtkviewport.c: SHAME! ok this one is tricky, so i note it
	here, those reading: learn from my mistake! ;)
	in order for set_?adjustment to support a default adjustemnt if
	invoked with an adjustment pointer of NULL, the code read (pseudo):
	if (v->adjustment) unref (v->adjustment);
	if (!adjustment) adjustment = adjustment_new ();
	if (v->adjustment != adjustment) v->adjustment = ref (adjustment);
	now imagine the first unref to actually free the old adjustment and
	adjustment_new() creating a new adjustment from the very same memory
	portion. here, the latter comparision will unintendedly fail, and
	all hell breaks loose.
	(gtk_viewport_set_hadjustment):
	(gtk_viewport_set_vadjustment): reset viewport->?adjustment to NULL
	after unreferencing it.

	* gtk/gtkcontainer.[hc]: removed toplevel registration
	functions: gtk_container_register_toplevel(),
	gtk_container_unregister_toplevel() and
	gtk_container_get_toplevels() which had wrong semantics
	anyways: it didn't reference and copy the list.

	* gtk/gtkwindow.c: we take over the container toplevel registration
	bussiness now. windows are registered across multiple destructions,
	untill they are finalized. the initial implicit reference count
	users are holding on windows is removed with the first destruction
	though.
	(gtk_window_init): ref & sink and set has_user_ref_count, got
	rid of gtk_container_register_toplevel() call. add window to
	toplevel_list.
	(gtk_window_destroy): unref the window if has_user_ref_count
	is still set, got rid of call to
	gtk_container_unregister_toplevel().
	(gtk_window_finalize): remove window from toplevel list.
	(gtk_window_list_toplevels): new function to return a newly
	created list with referenced toplevels.
	(gtk_window_read_rcfiles): use gtk_window_list_toplevels().

	* gtk/gtkhscale.c (gtk_hscale_class_init): made the GtkRange
	adjustment a non-construct arg.
	* gtk/gtkvscale.c (gtk_vscale_class_init): likewise.
	* gtk/gtkhscrollbar.c (gtk_vscrollbar_class_init): likewise.
	* gtk/gtkvscrollbar.c (gtk_vscrollbar_class_init): likewise.

	* gtk/gtkrange.c: added some realized checks.
	(gtk_range_destroy): get rid of the h/v adjustments in the
	destroy handler instead of finalize. remove timer.
	(gtk_range_get_adjustment): demand create adjustment.

	* gtk/gtkviewport.c: made h/v adjustment non-construct args.
	we simply create them on demand now and get rid of them in
	the destroy handler.
	(gtk_viewport_destroy): get rid of the h/v adjustments in the
	destroy handler instead of finalize.
	(gtk_viewport_get_hadjustment):
	(gtk_viewport_get_vadjustment):
	(gtk_viewport_size_allocate): demand create h/v adjustment
	if required.

	* gtk/gtkwidget.c (gtk_widget_finalize): duplicate part of the
	gtk_widget_real_destroy () functionality.
	(gtk_widget_real_destroy): reinitialize with a new style, instead
	of setting widget->style to NULL.

Fri May  5 13:02:09 2000  Tim Janik  <timj@gtk.org>

	* gtk/gtkcalendar.c:
	* gtk/gtkbutton.c: ported _get_type() implementation over to
	GType, either to preserve memchunks allocation facilities,
	or because Gtk+ 1.0 GtkTypeInfo was still being used.

	* gtk/gtkobject.[hc]: derive from GObject. ported various functions
	over. prepare for ::destroy to be emitted multiple times.
	removed reference tracer magic. chain into GObjectClass.shutdown()
	to emit ::destroy signal.

	* gtk/gtksignal.c: removed assumptions about GTK_TYPE_OBJECT being
	fundamental.

	* gtk/gtkmain.c: removed gtk_object_post_arg_parsing_init()
	cludge.

	* gtk/gtksocket.c:
	* gtk/gtkplug.c:
	* gtk/gtklayout.c:
	* gtk/gtklabel.c:
	* gtk/gtkargcollector.c:
	* gtk/gtkarg.c: various fixups to work with GTK_TYPE_OBJECT
	not being a fundamental anymore, and to work with the new
	type system (nuked fundamental type varargs clutter).

	* gtk/*.c: install finalize handlers in the GObjectClass
	part of the class structure.
	changed direct GTK_OBJECT()->klass accesses to
	GTK_*_GET_CLASS().
	changed direct object_class->type accesses to GTK_CLASS_TYPE().

	* gtktypeutils.[hc]: use the reserved fundamental ids provided by
	GType. made most of the GTK_*() type macros and Gtk* typedefs
	simple wrappers around macros and types provided by GType.
	most notably, a significant portion of the old API vanished:
	GTK_TYPE_MAKE(),
	GTK_TYPE_SEQNO(),
	GTK_TYPE_FLAT_FIRST, GTK_TYPE_FLAT_LAST,
	GTK_TYPE_STRUCTURED_FIRST, GTK_TYPE_STRUCTURED_LAST,
	GTK_TYPE_ARGS,
	GTK_TYPE_CALLBACK,
	GTK_TYPE_C_CALLBACK,
	GTK_TYPE_FOREIGN,
	GtkTypeQuery,
	gtk_type_query(),
	gtk_type_set_varargs_type(),
	gtk_type_get_varargs_type(),
	gtk_type_check_object_cast(),
	gtk_type_check_class_cast(),
	gtk_type_describe_tree(),
	gtk_type_describe_heritage(),
	gtk_type_free(),
	gtk_type_children_types(),
	gtk_type_set_chunk_alloc(),
	gtk_type_register_enum(),
	gtk_type_register_flags(),
	gtk_type_parent_class().
	replacements, where available are described in ../docs/Changes-1.4.txt.
	implemented compatibility functions for the remaining API.

	* configure.in: depend on glib 1.3.1, use gobject module.
2000-05-12 15:25:50 +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.
*/
/*
* Modified by the GTK+ Team and others 1997-1999. See the AUTHORS
* file for a list of people on the GTK+ Team. See the ChangeLog
* files for a list of changes. These files are distributed with
* GTK+ at ftp://ftp.gtk.org/pub/gtk/.
*/
#include "gtkscrolledwindow.h"
#include "gtksignal.h"
/* scrolled window policy and size requisition handling:
*
* gtk size requisition works as follows:
* a widget upon size-request reports the width and height that it finds
* to be best suited to display its contents, including children.
* the width and/or height reported from a widget upon size requisition
* may be overidden by the user by specifying a width and/or height
* other than 0 through gtk_widget_set_usize().
*
* a scrolled window needs (for imlementing all three policy types) to
* request its width and height based on two different rationales.
* 1) the user wants the scrolled window to just fit into the space
* that it gets allocated for a specifc dimension.
* 1.1) this does not apply if the user specified a concrete value
* value for that specific dimension by either specifying usize for the
* scrolled window or for its child.
* 2) the user wants the scrolled window to take as much space up as
* is desired by the child for a specifc dimension (i.e. POLICY_NEVER).
*
* also, kinda obvious:
* 3) a user would certainly not have choosen a scrolled window as a container
* for the child, if the resulting allocation takes up more space than the
* child would have allocated without the scrolled window.
*
* conclusions:
* A) from 1) follows: the scrolled window shouldn't request more space for a
* specifc dimension than is required at minimum.
* B) from 1.1) follows: the requisition may be overidden by usize of the scrolled
* window (done automatically) or by usize of the child (needs to be checked).
* C) from 2) follows: for POLICY_NEVER, the scrolled window simply reports the
* child's dimension.
* D) from 3) follows: the scrolled window child's minimum width and minimum height
* under A) at least correspond to the space taken up by its scrollbars.
*/
#define SCROLLBAR_SPACING(w) (GTK_SCROLLED_WINDOW_GET_CLASS (w)->scrollbar_spacing)
#define DEFAULT_SCROLLBAR_SPACING 3
enum {
ARG_0,
ARG_HADJUSTMENT,
ARG_VADJUSTMENT,
ARG_HSCROLLBAR_POLICY,
ARG_VSCROLLBAR_POLICY,
ARG_WINDOW_PLACEMENT
};
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 (GObject *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 gint gtk_scrolled_window_scroll_event (GtkWidget *widget,
GdkEventScroll *event);
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_relative_allocation(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)
{
static const 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_BIN, &scrolled_window_info);
}
return scrolled_window_type;
}
static void
gtk_scrolled_window_class_init (GtkScrolledWindowClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (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_BIN);
gobject_class->finalize = gtk_scrolled_window_finalize;
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;
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;
widget_class->scroll_event = gtk_scrolled_window_scroll_event;
container_class->add = gtk_scrolled_window_add;
container_class->remove = gtk_scrolled_window_remove;
container_class->forall = gtk_scrolled_window_forall;
class->scrollbar_spacing = DEFAULT_SCROLLBAR_SPACING;
gtk_object_add_arg_type ("GtkScrolledWindow::hadjustment",
GTK_TYPE_ADJUSTMENT,
GTK_ARG_READWRITE | GTK_ARG_CONSTRUCT,
ARG_HADJUSTMENT);
gtk_object_add_arg_type ("GtkScrolledWindow::vadjustment",
GTK_TYPE_ADJUSTMENT,
GTK_ARG_READWRITE | GTK_ARG_CONSTRUCT,
ARG_VADJUSTMENT);
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);
gtk_object_add_arg_type ("GtkScrolledWindow::window_placement",
GTK_TYPE_CORNER_TYPE,
GTK_ARG_READWRITE,
ARG_WINDOW_PLACEMENT);
}
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)
{
case ARG_HADJUSTMENT:
gtk_scrolled_window_set_hadjustment (scrolled_window, GTK_VALUE_POINTER (*arg));
break;
case ARG_VADJUSTMENT:
gtk_scrolled_window_set_vadjustment (scrolled_window, GTK_VALUE_POINTER (*arg));
break;
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;
case ARG_WINDOW_PLACEMENT:
gtk_scrolled_window_set_placement (scrolled_window,
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_HADJUSTMENT:
GTK_VALUE_POINTER (*arg) = gtk_scrolled_window_get_hadjustment (scrolled_window);
break;
case ARG_VADJUSTMENT:
GTK_VALUE_POINTER (*arg) = gtk_scrolled_window_get_vadjustment (scrolled_window);
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;
case ARG_WINDOW_PLACEMENT:
GTK_VALUE_ENUM (*arg) = scrolled_window->window_placement;
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->hscrollbar_visible = FALSE;
scrolled_window->vscrollbar_visible = FALSE;
scrolled_window->window_placement = GTK_CORNER_TOP_LEFT;
}
GtkWidget*
gtk_scrolled_window_new (GtkAdjustment *hadjustment,
GtkAdjustment *vadjustment)
{
GtkWidget *scrolled_window;
if (hadjustment)
g_return_val_if_fail (GTK_IS_ADJUSTMENT (hadjustment), NULL);
if (vadjustment)
g_return_val_if_fail (GTK_IS_ADJUSTMENT (vadjustment), NULL);
scrolled_window = gtk_widget_new (GTK_TYPE_SCROLLED_WINDOW,
"hadjustment", hadjustment,
"vadjustment", vadjustment,
NULL);
return scrolled_window;
}
void
gtk_scrolled_window_set_hadjustment (GtkScrolledWindow *scrolled_window,
GtkAdjustment *hadjustment)
{
GtkBin *bin;
g_return_if_fail (scrolled_window != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
if (hadjustment)
g_return_if_fail (GTK_IS_ADJUSTMENT (hadjustment));
else
hadjustment = (GtkAdjustment*) gtk_object_new (GTK_TYPE_ADJUSTMENT, NULL);
bin = GTK_BIN (scrolled_window);
if (!scrolled_window->hscrollbar)
{
gtk_widget_push_composite_child ();
scrolled_window->hscrollbar = gtk_hscrollbar_new (hadjustment);
gtk_widget_set_composite_name (scrolled_window->hscrollbar, "hscrollbar");
gtk_widget_pop_composite_child ();
gtk_widget_set_parent (scrolled_window->hscrollbar, GTK_WIDGET (scrolled_window));
gtk_widget_ref (scrolled_window->hscrollbar);
gtk_widget_show (scrolled_window->hscrollbar);
}
else
{
GtkAdjustment *old_adjustment;
old_adjustment = gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar));
if (old_adjustment == hadjustment)
return;
gtk_signal_disconnect_by_func (GTK_OBJECT (old_adjustment),
GTK_SIGNAL_FUNC (gtk_scrolled_window_adjustment_changed),
scrolled_window);
gtk_range_set_adjustment (GTK_RANGE (scrolled_window->hscrollbar),
hadjustment);
}
hadjustment = gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar));
gtk_signal_connect (GTK_OBJECT (hadjustment),
"changed",
GTK_SIGNAL_FUNC (gtk_scrolled_window_adjustment_changed),
scrolled_window);
gtk_scrolled_window_adjustment_changed (hadjustment, scrolled_window);
if (bin->child)
gtk_widget_set_scroll_adjustments (bin->child,
gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar)),
gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar)));
}
void
gtk_scrolled_window_set_vadjustment (GtkScrolledWindow *scrolled_window,
GtkAdjustment *vadjustment)
{
GtkBin *bin;
g_return_if_fail (scrolled_window != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
if (vadjustment)
g_return_if_fail (GTK_IS_ADJUSTMENT (vadjustment));
else
vadjustment = (GtkAdjustment*) gtk_object_new (GTK_TYPE_ADJUSTMENT, NULL);
bin = GTK_BIN (scrolled_window);
if (!scrolled_window->vscrollbar)
{
gtk_widget_push_composite_child ();
scrolled_window->vscrollbar = gtk_vscrollbar_new (vadjustment);
gtk_widget_set_composite_name (scrolled_window->vscrollbar, "vscrollbar");
gtk_widget_pop_composite_child ();
gtk_widget_set_parent (scrolled_window->vscrollbar, GTK_WIDGET (scrolled_window));
gtk_widget_ref (scrolled_window->vscrollbar);
gtk_widget_show (scrolled_window->vscrollbar);
}
else
{
GtkAdjustment *old_adjustment;
old_adjustment = gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar));
if (old_adjustment == vadjustment)
return;
gtk_signal_disconnect_by_func (GTK_OBJECT (old_adjustment),
GTK_SIGNAL_FUNC (gtk_scrolled_window_adjustment_changed),
scrolled_window);
gtk_range_set_adjustment (GTK_RANGE (scrolled_window->vscrollbar),
vadjustment);
}
vadjustment = gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar));
gtk_signal_connect (GTK_OBJECT (vadjustment),
"changed",
GTK_SIGNAL_FUNC (gtk_scrolled_window_adjustment_changed),
scrolled_window);
gtk_scrolled_window_adjustment_changed (vadjustment, scrolled_window);
if (bin->child)
gtk_widget_set_scroll_adjustments (bin->child,
gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar)),
gtk_range_get_adjustment (GTK_RANGE (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 (scrolled_window->hscrollbar ?
gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar)) :
NULL);
}
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 (scrolled_window->vscrollbar ?
gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar)) :
NULL);
}
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;
gtk_widget_queue_resize (GTK_WIDGET (scrolled_window));
}
}
void
gtk_scrolled_window_set_placement (GtkScrolledWindow *scrolled_window,
GtkCornerType window_placement)
{
g_return_if_fail (scrolled_window != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
if (scrolled_window->window_placement != window_placement)
{
scrolled_window->window_placement = window_placement;
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_unparent (scrolled_window->hscrollbar);
gtk_widget_unparent (scrolled_window->vscrollbar);
gtk_widget_destroy (scrolled_window->hscrollbar);
gtk_widget_destroy (scrolled_window->vscrollbar);
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
static void
gtk_scrolled_window_finalize (GObject *object)
{
GtkScrolledWindow *scrolled_window = GTK_SCROLLED_WINDOW (object);
gtk_widget_unref (scrolled_window->hscrollbar);
gtk_widget_unref (scrolled_window->vscrollbar);
G_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));
scrolled_window = GTK_SCROLLED_WINDOW (widget);
/* chain parent class handler to map self and child */
GTK_WIDGET_CLASS (parent_class)->map (widget);
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));
scrolled_window = GTK_SCROLLED_WINDOW (widget);
/* chain parent class handler to unmap self and child */
GTK_WIDGET_CLASS (parent_class)->unmap (widget);
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;
GtkBin *bin;
GdkRectangle child_area;
g_return_if_fail (widget != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (widget));
g_return_if_fail (area != NULL);
scrolled_window = GTK_SCROLLED_WINDOW (widget);
bin = GTK_BIN (widget);
if (bin->child && GTK_WIDGET_VISIBLE (bin->child) &&
gtk_widget_intersect (bin->child, area, &child_area))
gtk_widget_draw (bin->child, &child_area);
if (GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar) &&
gtk_widget_intersect (scrolled_window->hscrollbar, area, &child_area))
gtk_widget_draw (scrolled_window->hscrollbar, &child_area);
if (GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar) &&
gtk_widget_intersect (scrolled_window->vscrollbar, area, &child_area))
gtk_widget_draw (scrolled_window->vscrollbar, &child_area);
}
static void
gtk_scrolled_window_forall (GtkContainer *container,
gboolean include_internals,
GtkCallback callback,
gpointer callback_data)
{
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
g_return_if_fail (callback != NULL);
GTK_CONTAINER_CLASS (parent_class)->forall (container,
include_internals,
callback,
callback_data);
if (include_internals)
{
GtkScrolledWindow *scrolled_window;
scrolled_window = GTK_SCROLLED_WINDOW (container);
if (scrolled_window->vscrollbar)
callback (scrolled_window->vscrollbar, callback_data);
if (scrolled_window->hscrollbar)
callback (scrolled_window->hscrollbar, callback_data);
}
}
static void
gtk_scrolled_window_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkScrolledWindow *scrolled_window;
GtkBin *bin;
gint extra_width;
gint extra_height;
GtkRequisition hscrollbar_requisition;
GtkRequisition vscrollbar_requisition;
GtkRequisition child_requisition;
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);
bin = GTK_BIN (scrolled_window);
extra_width = 0;
extra_height = 0;
requisition->width = 0;
requisition->height = 0;
gtk_widget_size_request (scrolled_window->hscrollbar,
&hscrollbar_requisition);
gtk_widget_size_request (scrolled_window->vscrollbar,
&vscrollbar_requisition);
if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
{
static guint quark_aux_info = 0;
if (!quark_aux_info)
quark_aux_info = g_quark_from_static_string ("gtk-aux-info");
gtk_widget_size_request (bin->child, &child_requisition);
if (scrolled_window->hscrollbar_policy == GTK_POLICY_NEVER)
requisition->width += child_requisition.width;
else
{
GtkWidgetAuxInfo *aux_info;
aux_info = gtk_object_get_data_by_id (GTK_OBJECT (bin->child), quark_aux_info);
if (aux_info && aux_info->width > 0)
{
requisition->width += aux_info->width;
extra_width = -1;
}
else
requisition->width += vscrollbar_requisition.width;
}
if (scrolled_window->vscrollbar_policy == GTK_POLICY_NEVER)
requisition->height += child_requisition.height;
else
{
GtkWidgetAuxInfo *aux_info;
aux_info = gtk_object_get_data_by_id (GTK_OBJECT (bin->child), quark_aux_info);
if (aux_info && aux_info->height > 0)
{
requisition->height += aux_info->height;
extra_height = -1;
}
else
requisition->height += hscrollbar_requisition.height;
}
}
if (scrolled_window->hscrollbar_policy == GTK_POLICY_AUTOMATIC ||
scrolled_window->hscrollbar_policy == GTK_POLICY_ALWAYS)
{
requisition->width = MAX (requisition->width, hscrollbar_requisition.width);
if (!extra_height || scrolled_window->hscrollbar_policy == GTK_POLICY_ALWAYS)
extra_height = SCROLLBAR_SPACING (scrolled_window) + hscrollbar_requisition.height;
}
if (scrolled_window->vscrollbar_policy == GTK_POLICY_AUTOMATIC ||
scrolled_window->vscrollbar_policy == GTK_POLICY_ALWAYS)
{
requisition->height = MAX (requisition->height, vscrollbar_requisition.height);
if (!extra_height || scrolled_window->vscrollbar_policy == GTK_POLICY_ALWAYS)
extra_width = SCROLLBAR_SPACING (scrolled_window) + vscrollbar_requisition.width;
}
requisition->width += GTK_CONTAINER (widget)->border_width * 2 + MAX (0, extra_width);
requisition->height += GTK_CONTAINER (widget)->border_width * 2 + MAX (0, extra_height);
}
static void
gtk_scrolled_window_relative_allocation (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, (gint)widget->allocation.width - allocation->x * 2);
allocation->height = MAX (1, (gint)widget->allocation.height - allocation->y * 2);
if (scrolled_window->vscrollbar_visible)
{
GtkRequisition vscrollbar_requisition;
gtk_widget_get_child_requisition (scrolled_window->vscrollbar,
&vscrollbar_requisition);
if (scrolled_window->window_placement == GTK_CORNER_TOP_RIGHT ||
scrolled_window->window_placement == GTK_CORNER_BOTTOM_RIGHT)
allocation->x += (vscrollbar_requisition.width +
SCROLLBAR_SPACING (scrolled_window));
allocation->width = MAX (1, (gint)allocation->width -
((gint)vscrollbar_requisition.width +
(gint)SCROLLBAR_SPACING (scrolled_window)));
}
if (scrolled_window->hscrollbar_visible)
{
GtkRequisition hscrollbar_requisition;
gtk_widget_get_child_requisition (scrolled_window->hscrollbar,
&hscrollbar_requisition);
if (scrolled_window->window_placement == GTK_CORNER_BOTTOM_LEFT ||
scrolled_window->window_placement == GTK_CORNER_BOTTOM_RIGHT)
allocation->y += (hscrollbar_requisition.height +
SCROLLBAR_SPACING (scrolled_window));
allocation->height = MAX (1, (gint)allocation->height -
((gint)hscrollbar_requisition.height +
(gint)SCROLLBAR_SPACING (scrolled_window)));
}
}
static void
gtk_scrolled_window_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkScrolledWindow *scrolled_window;
GtkBin *bin;
GtkAllocation relative_allocation;
GtkAllocation child_allocation;
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);
bin = GTK_BIN (scrolled_window);
widget->allocation = *allocation;
if (scrolled_window->hscrollbar_policy == GTK_POLICY_ALWAYS)
scrolled_window->hscrollbar_visible = TRUE;
else if (scrolled_window->hscrollbar_policy == GTK_POLICY_NEVER)
scrolled_window->hscrollbar_visible = FALSE;
if (scrolled_window->vscrollbar_policy == GTK_POLICY_ALWAYS)
scrolled_window->vscrollbar_visible = TRUE;
else if (scrolled_window->vscrollbar_policy == GTK_POLICY_NEVER)
scrolled_window->vscrollbar_visible = FALSE;
if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
{
gboolean previous_hvis;
gboolean previous_vvis;
guint count = 0;
do
{
gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
child_allocation.x = relative_allocation.x + allocation->x;
child_allocation.y = relative_allocation.y + allocation->y;
child_allocation.width = relative_allocation.width;
child_allocation.height = relative_allocation.height;
previous_hvis = scrolled_window->hscrollbar_visible;
previous_vvis = scrolled_window->vscrollbar_visible;
gtk_widget_size_allocate (bin->child, &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;
/* a new resize is already queued at this point,
* so we will immediatedly get reinvoked
*/
return;
}
count++;
}
while (previous_hvis != scrolled_window->hscrollbar_visible ||
previous_vvis != scrolled_window->vscrollbar_visible);
}
else
gtk_scrolled_window_relative_allocation (widget, &relative_allocation);
if (scrolled_window->hscrollbar_visible)
{
GtkRequisition hscrollbar_requisition;
gtk_widget_get_child_requisition (scrolled_window->hscrollbar,
&hscrollbar_requisition);
if (!GTK_WIDGET_VISIBLE (scrolled_window->hscrollbar))
gtk_widget_show (scrolled_window->hscrollbar);
child_allocation.x = relative_allocation.x;
if (scrolled_window->window_placement == GTK_CORNER_TOP_LEFT ||
scrolled_window->window_placement == GTK_CORNER_TOP_RIGHT)
child_allocation.y = (relative_allocation.y +
relative_allocation.height +
SCROLLBAR_SPACING (scrolled_window));
else
child_allocation.y = GTK_CONTAINER (scrolled_window)->border_width;
child_allocation.width = relative_allocation.width;
child_allocation.height = 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)
{
GtkRequisition vscrollbar_requisition;
if (!GTK_WIDGET_VISIBLE (scrolled_window->vscrollbar))
gtk_widget_show (scrolled_window->vscrollbar);
gtk_widget_get_child_requisition (scrolled_window->vscrollbar,
&vscrollbar_requisition);
if (scrolled_window->window_placement == GTK_CORNER_TOP_LEFT ||
scrolled_window->window_placement == GTK_CORNER_BOTTOM_LEFT)
child_allocation.x = (relative_allocation.x +
relative_allocation.width +
SCROLLBAR_SPACING (scrolled_window));
else
child_allocation.x = GTK_CONTAINER (scrolled_window)->border_width;
child_allocation.y = relative_allocation.y;
child_allocation.width = vscrollbar_requisition.width;
child_allocation.height = relative_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 gint
gtk_scrolled_window_scroll_event (GtkWidget *widget,
GdkEventScroll *event)
{
GtkWidget *range;
g_return_val_if_fail (widget != NULL, FALSE);
g_return_val_if_fail (GTK_IS_SCROLLED_WINDOW (widget), FALSE);
g_return_val_if_fail (event != NULL, FALSE);
if (event->direction == GDK_SCROLL_UP || event->direction == GDK_SCROLL_DOWN)
range = GTK_SCROLLED_WINDOW (widget)->vscrollbar;
else
range = GTK_SCROLLED_WINDOW (widget)->hscrollbar;
if (range && GTK_WIDGET_VISIBLE (range))
{
GtkAdjustment *adj = GTK_RANGE (range)->adjustment;
gfloat new_value;
if (event->direction == GDK_SCROLL_UP || event->direction == GDK_SCROLL_LEFT)
new_value = adj->value - adj->page_increment / 2;
else
new_value = adj->value + adj->page_increment / 2;
new_value = CLAMP (new_value, adj->lower, adj->upper - adj->page_size);
gtk_adjustment_set_value (adj, new_value);
return TRUE;
}
return FALSE;
}
static void
gtk_scrolled_window_adjustment_changed (GtkAdjustment *adjustment,
gpointer data)
{
GtkScrolledWindow *scrolled_win;
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)
{
gboolean visible;
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)
{
gboolean visible;
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));
}
}
}
static void
gtk_scrolled_window_add (GtkContainer *container,
GtkWidget *child)
{
GtkScrolledWindow *scrolled_window;
GtkBin *bin;
bin = GTK_BIN (container);
g_return_if_fail (bin->child == NULL);
scrolled_window = GTK_SCROLLED_WINDOW (container);
bin->child = child;
gtk_widget_set_parent (child, GTK_WIDGET (bin));
/* this is a temporary message */
if (!gtk_widget_set_scroll_adjustments (child,
gtk_range_get_adjustment (GTK_RANGE (scrolled_window->hscrollbar)),
gtk_range_get_adjustment (GTK_RANGE (scrolled_window->vscrollbar))))
g_warning ("gtk_scrolled_window_add(): cannot add non scrollable widget "
"use gtk_scrolled_window_add_with_viewport() instead");
if (GTK_WIDGET_REALIZED (child->parent))
gtk_widget_realize (child);
if (GTK_WIDGET_VISIBLE (child->parent) && GTK_WIDGET_VISIBLE (child))
{
if (GTK_WIDGET_MAPPED (child->parent))
gtk_widget_map (child);
gtk_widget_queue_resize (child);
}
}
static void
gtk_scrolled_window_remove (GtkContainer *container,
GtkWidget *child)
{
g_return_if_fail (container != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (container));
g_return_if_fail (child != NULL);
g_return_if_fail (GTK_BIN (container)->child == child);
gtk_widget_set_scroll_adjustments (child, NULL, NULL);
/* chain parent class handler to remove child */
GTK_CONTAINER_CLASS (parent_class)->remove (container, child);
}
void
gtk_scrolled_window_add_with_viewport (GtkScrolledWindow *scrolled_window,
GtkWidget *child)
{
GtkBin *bin;
GtkWidget *viewport;
g_return_if_fail (scrolled_window != NULL);
g_return_if_fail (GTK_IS_SCROLLED_WINDOW (scrolled_window));
g_return_if_fail (child != NULL);
g_return_if_fail (GTK_IS_WIDGET (child));
g_return_if_fail (child->parent == NULL);
bin = GTK_BIN (scrolled_window);
if (bin->child != NULL)
{
g_return_if_fail (GTK_IS_VIEWPORT (bin->child));
g_return_if_fail (GTK_BIN (bin->child)->child == NULL);
viewport = bin->child;
}
else
{
viewport =
gtk_viewport_new (gtk_scrolled_window_get_hadjustment (scrolled_window),
gtk_scrolled_window_get_vadjustment (scrolled_window));
gtk_container_add (GTK_CONTAINER (scrolled_window), viewport);
}
gtk_widget_show (viewport);
gtk_container_add (GTK_CONTAINER (viewport), child);
}
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