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gtk2/gtk/gtkviewport.c
Owen Taylor 0b7c616a24 Many fixes, along with extensive cleanups and refactoring of code to 
Fri Jun  6 16:25:44 2003  Owen Taylor  <otaylor@redhat.com>

        * gtk/gtkviewport.c: Many fixes, along with extensive cleanups and
        refactoring of code to reduce duplication; fixes include:

        - gtk_viewport_realize(): Position the window correct from adjustment
        values. (#110737, Michael Natterer)

        - Remove some division-by-zero checks in places where there is no
        longer division. (#110737)

        - gtk_viewport_class_init: Make the hadjustment/vadjustment properties
        G_PARAM_CONSTRUCT, so that there will always be adjustments, even
        if gtk_viewport_new isn't used (#101135, Thomas Leonard).

        - Switch over to encapsulated lazy-creation for hadjustment/
        vadjustment; even with the CONSTRUCT property, we need this after
        destroy.

        - When updating the adjustment, immediate set their values to
        match the the current range of the viewport, and update the
        viewport position to match the value of the new adjustments.
        (Part of #1165
2003-06-06 23:08:14 +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 Lesser 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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 1997-2000. 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 "gtkviewport.h"
#include "gtkintl.h"
#include "gtkmarshalers.h"
enum {
PROP_0,
PROP_HADJUSTMENT,
PROP_VADJUSTMENT,
PROP_SHADOW_TYPE
};
static void gtk_viewport_class_init (GtkViewportClass *klass);
static void gtk_viewport_init (GtkViewport *viewport);
static void gtk_viewport_finalize (GObject *object);
static void gtk_viewport_destroy (GtkObject *object);
static void gtk_viewport_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_viewport_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void gtk_viewport_set_scroll_adjustments (GtkViewport *viewport,
GtkAdjustment *hadjustment,
GtkAdjustment *vadjustment);
static void gtk_viewport_realize (GtkWidget *widget);
static void gtk_viewport_unrealize (GtkWidget *widget);
static void gtk_viewport_paint (GtkWidget *widget,
GdkRectangle *area);
static gint gtk_viewport_expose (GtkWidget *widget,
GdkEventExpose *event);
static void gtk_viewport_add (GtkContainer *container,
GtkWidget *widget);
static void gtk_viewport_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_viewport_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment,
gpointer data);
static void gtk_viewport_style_set (GtkWidget *widget,
GtkStyle *previous_style);
static GtkBinClass *parent_class;
GType
gtk_viewport_get_type (void)
{
static GType viewport_type = 0;
if (!viewport_type)
{
static const GTypeInfo viewport_info =
{
sizeof (GtkViewportClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gtk_viewport_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkViewport),
0, /* n_preallocs */
(GInstanceInitFunc) gtk_viewport_init,
};
viewport_type = g_type_register_static (GTK_TYPE_BIN, "GtkViewport",
&viewport_info, 0);
}
return viewport_type;
}
static void
gtk_viewport_class_init (GtkViewportClass *class)
{
GtkObjectClass *object_class;
GObjectClass *gobject_class;
GtkWidgetClass *widget_class;
GtkContainerClass *container_class;
object_class = (GtkObjectClass*) class;
gobject_class = G_OBJECT_CLASS (class);
widget_class = (GtkWidgetClass*) class;
container_class = (GtkContainerClass*) class;
parent_class = g_type_class_peek_parent (class);
gobject_class->finalize = gtk_viewport_finalize;
gobject_class->set_property = gtk_viewport_set_property;
gobject_class->get_property = gtk_viewport_get_property;
object_class->destroy = gtk_viewport_destroy;
widget_class->realize = gtk_viewport_realize;
widget_class->unrealize = gtk_viewport_unrealize;
widget_class->expose_event = gtk_viewport_expose;
widget_class->size_request = gtk_viewport_size_request;
widget_class->size_allocate = gtk_viewport_size_allocate;
widget_class->style_set = gtk_viewport_style_set;
container_class->add = gtk_viewport_add;
class->set_scroll_adjustments = gtk_viewport_set_scroll_adjustments;
g_object_class_install_property (gobject_class,
PROP_HADJUSTMENT,
g_param_spec_object ("hadjustment",
_("Horizontal adjustment"),
_("The GtkAdjustment that determines the values of the horizontal position for this viewport"),
GTK_TYPE_ADJUSTMENT,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
g_object_class_install_property (gobject_class,
PROP_VADJUSTMENT,
g_param_spec_object ("vadjustment",
_("Vertical adjustment"),
_("The GtkAdjustment that determines the values of the vertical position for this viewport"),
GTK_TYPE_ADJUSTMENT,
G_PARAM_READWRITE | G_PARAM_CONSTRUCT));
g_object_class_install_property (gobject_class,
PROP_SHADOW_TYPE,
g_param_spec_enum ("shadow_type",
_("Shadow type"),
_("Determines how the shadowed box around the viewport is drawn"),
GTK_TYPE_SHADOW_TYPE,
GTK_SHADOW_IN,
G_PARAM_READWRITE));
widget_class->set_scroll_adjustments_signal =
g_signal_new ("set_scroll_adjustments",
G_OBJECT_CLASS_TYPE (gobject_class),
G_SIGNAL_RUN_LAST | G_SIGNAL_ACTION,
G_STRUCT_OFFSET (GtkViewportClass, set_scroll_adjustments),
NULL, NULL,
_gtk_marshal_VOID__OBJECT_OBJECT,
G_TYPE_NONE, 2,
GTK_TYPE_ADJUSTMENT,
GTK_TYPE_ADJUSTMENT);
}
static void
gtk_viewport_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkViewport *viewport;
viewport = GTK_VIEWPORT (object);
switch (prop_id)
{
case PROP_HADJUSTMENT:
gtk_viewport_set_hadjustment (viewport, g_value_get_object (value));
break;
case PROP_VADJUSTMENT:
gtk_viewport_set_vadjustment (viewport, g_value_get_object (value));
break;
case PROP_SHADOW_TYPE:
gtk_viewport_set_shadow_type (viewport, g_value_get_enum (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_viewport_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkViewport *viewport;
viewport = GTK_VIEWPORT (object);
switch (prop_id)
{
case PROP_HADJUSTMENT:
g_value_set_object (value, viewport->hadjustment);
break;
case PROP_VADJUSTMENT:
g_value_set_object (value, viewport->vadjustment);
break;
case PROP_SHADOW_TYPE:
g_value_set_enum (value, viewport->shadow_type);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_viewport_init (GtkViewport *viewport)
{
GTK_WIDGET_UNSET_FLAGS (viewport, GTK_NO_WINDOW);
gtk_widget_set_redraw_on_allocate (GTK_WIDGET (viewport), FALSE);
gtk_container_set_resize_mode (GTK_CONTAINER (viewport), GTK_RESIZE_QUEUE);
viewport->shadow_type = GTK_SHADOW_IN;
viewport->view_window = NULL;
viewport->bin_window = NULL;
viewport->hadjustment = NULL;
viewport->vadjustment = NULL;
}
/**
* gtk_viewport_new:
* @hadjustment: horizontal adjustment.
* @vadjustment: vertical adjustment.
* @returns: a new #GtkViewport.
*
* Creates a new #GtkViewport with the given adjustments.
*
**/
GtkWidget*
gtk_viewport_new (GtkAdjustment *hadjustment,
GtkAdjustment *vadjustment)
{
GtkWidget *viewport;
viewport = gtk_widget_new (GTK_TYPE_VIEWPORT,
"hadjustment", hadjustment,
"vadjustment", vadjustment,
NULL);
return viewport;
}
#define ADJUSTMENT_POINTER(viewport, orientation) \
(((orientation) == GTK_ORIENTATION_HORIZONTAL) ? \
&(viewport)->hadjustment : &(viewport)->vadjustment)
static void
viewport_disconnect_adjustment (GtkViewport *viewport,
GtkOrientation orientation)
{
GtkAdjustment **adjustmentp = ADJUSTMENT_POINTER (viewport, orientation);
if (*adjustmentp)
{
g_signal_handlers_disconnect_by_func (*adjustmentp,
gtk_viewport_adjustment_value_changed,
viewport);
g_object_unref (*adjustmentp);
*adjustmentp = NULL;
}
}
static void
gtk_viewport_finalize (GObject *object)
{
GtkViewport *viewport = GTK_VIEWPORT (object);
viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL);
viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_VERTICAL);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gtk_viewport_destroy (GtkObject *object)
{
GtkViewport *viewport = GTK_VIEWPORT (object);
viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL);
viewport_disconnect_adjustment (viewport, GTK_ORIENTATION_VERTICAL);
GTK_OBJECT_CLASS (parent_class)->destroy (object);
}
/**
* gtk_viewport_get_hadjustment:
* @viewport: a #GtkViewport.
*
* Returns the horizontal adjustment of the viewport.
*
* Return value: the horizontal adjustment of @viewport.
**/
GtkAdjustment*
gtk_viewport_get_hadjustment (GtkViewport *viewport)
{
g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
if (!viewport->hadjustment)
gtk_viewport_set_hadjustment (viewport, NULL);
return viewport->hadjustment;
}
/**
* gtk_viewport_get_vadjustment:
* @viewport: a #GtkViewport.
*
* Returns the vertical adjustment of the viewport.
*
* Return value: the vertical adjustment of @viewport.
**/
GtkAdjustment*
gtk_viewport_get_vadjustment (GtkViewport *viewport)
{
g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), NULL);
if (!viewport->vadjustment)
gtk_viewport_set_vadjustment (viewport, NULL);
return viewport->vadjustment;
}
static void
viewport_get_view_allocation (GtkViewport *viewport,
GtkAllocation *view_allocation)
{
GtkWidget *widget = GTK_WIDGET (viewport);
GtkAllocation *allocation = &widget->allocation;
gint border_width = GTK_CONTAINER (viewport)->border_width;
view_allocation->x = 0;
view_allocation->y = 0;
if (viewport->shadow_type != GTK_SHADOW_NONE)
{
view_allocation->x = widget->style->xthickness;
view_allocation->y = widget->style->ythickness;
}
view_allocation->width = MAX (1, allocation->width - view_allocation->x * 2 - border_width * 2);
view_allocation->height = MAX (1, allocation->height - view_allocation->y * 2 - border_width * 2);
}
static void
viewport_reclamp_adjustment (GtkAdjustment *adjustment,
gboolean *value_changed)
{
gdouble value = adjustment->value;
value = CLAMP (value, 0, adjustment->upper - adjustment->page_size);
if (value != adjustment->value)
{
adjustment->value = value;
if (value_changed)
*value_changed = TRUE;
}
else if (value_changed)
*value_changed = FALSE;
}
static void
viewport_set_hadjustment_values (GtkViewport *viewport,
gboolean *value_changed)
{
GtkBin *bin = GTK_BIN (viewport);
GtkAllocation view_allocation;
GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport);
viewport_get_view_allocation (viewport, &view_allocation);
hadjustment->page_size = view_allocation.width;
hadjustment->step_increment = view_allocation.width * 0.1;
hadjustment->page_increment = view_allocation.width * 0.9;
hadjustment->lower = 0;
if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
{
GtkRequisition child_requisition;
gtk_widget_get_child_requisition (bin->child, &child_requisition);
hadjustment->upper = MAX (child_requisition.width, view_allocation.width);
}
else
hadjustment->upper = view_allocation.width;
viewport_reclamp_adjustment (hadjustment, value_changed);
}
static void
viewport_set_vadjustment_values (GtkViewport *viewport,
gboolean *value_changed)
{
GtkBin *bin = GTK_BIN (viewport);
GtkAllocation view_allocation;
GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport);
viewport_get_view_allocation (viewport, &view_allocation);
vadjustment->page_size = view_allocation.height;
vadjustment->step_increment = view_allocation.height * 0.1;
vadjustment->page_increment = view_allocation.height * 0.9;
vadjustment->lower = 0;
if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
{
GtkRequisition child_requisition;
gtk_widget_get_child_requisition (bin->child, &child_requisition);
vadjustment->upper = MAX (child_requisition.height, view_allocation.height);
}
else
vadjustment->upper = view_allocation.height;
viewport_reclamp_adjustment (vadjustment, value_changed);
}
static void
viewport_set_adjustment (GtkViewport *viewport,
GtkOrientation orientation,
GtkAdjustment *adjustment)
{
GtkAdjustment **adjustmentp = ADJUSTMENT_POINTER (viewport, orientation);
gboolean value_changed;
if (adjustment == *adjustmentp)
return;
if (!adjustment)
adjustment = GTK_ADJUSTMENT (gtk_adjustment_new (0.0, 0.0, 0.0,
0.0, 0.0, 0.0));
*adjustmentp = adjustment;
g_object_ref (adjustment);
gtk_object_sink (GTK_OBJECT (adjustment));
if (orientation == GTK_ORIENTATION_HORIZONTAL)
viewport_set_hadjustment_values (viewport, &value_changed);
else
viewport_set_vadjustment_values (viewport, &value_changed);
g_signal_connect (adjustment, "value_changed",
G_CALLBACK (gtk_viewport_adjustment_value_changed),
viewport);
gtk_adjustment_changed (adjustment);
if (value_changed)
gtk_adjustment_value_changed (adjustment);
else
gtk_viewport_adjustment_value_changed (adjustment, viewport);
}
/**
* gtk_viewport_set_hadjustment:
* @viewport: a #GtkViewport.
* @adjustment: a #GtkAdjustment.
*
* Sets the horizontal adjustment of the viewport.
**/
void
gtk_viewport_set_hadjustment (GtkViewport *viewport,
GtkAdjustment *adjustment)
{
g_return_if_fail (GTK_IS_VIEWPORT (viewport));
if (adjustment)
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
viewport_set_adjustment (viewport, GTK_ORIENTATION_HORIZONTAL, adjustment);
g_object_notify (G_OBJECT (viewport), "hadjustment");
}
/**
* gtk_viewport_set_vadjustment:
* @viewport: a #GtkViewport.
* @adjustment: a #GtkAdjustment.
*
* Sets the vertical adjustment of the viewport.
**/
void
gtk_viewport_set_vadjustment (GtkViewport *viewport,
GtkAdjustment *adjustment)
{
g_return_if_fail (GTK_IS_VIEWPORT (viewport));
if (adjustment)
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
viewport_set_adjustment (viewport, GTK_ORIENTATION_VERTICAL, adjustment);
g_object_notify (G_OBJECT (viewport), "vadjustment");
}
static void
gtk_viewport_set_scroll_adjustments (GtkViewport *viewport,
GtkAdjustment *hadjustment,
GtkAdjustment *vadjustment)
{
gtk_viewport_set_hadjustment (viewport, hadjustment);
gtk_viewport_set_vadjustment (viewport, vadjustment);
}
/**
* gtk_viewport_set_shadow_type:
* @viewport: a #GtkViewport.
* @type: the new shadow type.
*
* Sets the shadow type of the viewport.
**/
void
gtk_viewport_set_shadow_type (GtkViewport *viewport,
GtkShadowType type)
{
g_return_if_fail (GTK_IS_VIEWPORT (viewport));
if ((GtkShadowType) viewport->shadow_type != type)
{
viewport->shadow_type = type;
if (GTK_WIDGET_VISIBLE (viewport))
{
gtk_widget_size_allocate (GTK_WIDGET (viewport), &(GTK_WIDGET (viewport)->allocation));
gtk_widget_queue_draw (GTK_WIDGET (viewport));
}
g_object_notify (G_OBJECT (viewport), "shadow_type");
}
}
/**
* gtk_viewport_get_shadow_type:
* @viewport: a #GtkViewport
*
* Gets the shadow type of the #GtkViewport. See
* gtk_viewport_set_shadow_type().
* Return value: the shadow type
**/
GtkShadowType
gtk_viewport_get_shadow_type (GtkViewport *viewport)
{
g_return_val_if_fail (GTK_IS_VIEWPORT (viewport), GTK_SHADOW_NONE);
return viewport->shadow_type;
}
static void
gtk_viewport_realize (GtkWidget *widget)
{
GtkViewport *viewport = GTK_VIEWPORT (widget);
GtkBin *bin = GTK_BIN (widget);
GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport);
GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport);
gint border_width = GTK_CONTAINER (widget)->border_width;
GtkAllocation view_allocation;
GdkWindowAttr attributes;
gint attributes_mask;
gint event_mask;
GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
attributes.x = widget->allocation.x + border_width;
attributes.y = widget->allocation.y + border_width;
attributes.width = widget->allocation.width - border_width * 2;
attributes.height = widget->allocation.height - border_width * 2;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.wclass = GDK_INPUT_OUTPUT;
attributes.visual = gtk_widget_get_visual (widget);
attributes.colormap = gtk_widget_get_colormap (widget);
event_mask = gtk_widget_get_events (widget) | GDK_EXPOSURE_MASK;
/* We select on button_press_mask so that button 4-5 scrolls are trapped.
*/
attributes.event_mask = event_mask | GDK_BUTTON_PRESS_MASK;
attributes_mask = GDK_WA_X | GDK_WA_Y | GDK_WA_VISUAL | GDK_WA_COLORMAP;
widget->window = gdk_window_new (gtk_widget_get_parent_window (widget),
&attributes, attributes_mask);
gdk_window_set_user_data (widget->window, viewport);
viewport_get_view_allocation (viewport, &view_allocation);
attributes.x = view_allocation.x;
attributes.y = view_allocation.y;
attributes.width = view_allocation.width;
attributes.height = view_allocation.height;
attributes.event_mask = 0;
viewport->view_window = gdk_window_new (widget->window, &attributes, attributes_mask);
gdk_window_set_user_data (viewport->view_window, viewport);
attributes.x = - hadjustment->value;
attributes.y = - vadjustment->value;
attributes.width = hadjustment->upper;
attributes.height = vadjustment->upper;
attributes.event_mask = event_mask;
viewport->bin_window = gdk_window_new (viewport->view_window, &attributes, attributes_mask);
gdk_window_set_user_data (viewport->bin_window, viewport);
if (bin->child)
gtk_widget_set_parent_window (bin->child, viewport->bin_window);
widget->style = gtk_style_attach (widget->style, widget->window);
gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
gtk_style_set_background (widget->style, viewport->bin_window, GTK_STATE_NORMAL);
/* Call paint here to allow a theme to set the background without flashing
*/
gtk_paint_flat_box(widget->style, viewport->bin_window, GTK_STATE_NORMAL,
GTK_SHADOW_NONE,
NULL, widget, "viewportbin",
0, 0, -1, -1);
gdk_window_show (viewport->bin_window);
gdk_window_show (viewport->view_window);
}
static void
gtk_viewport_unrealize (GtkWidget *widget)
{
GtkViewport *viewport = GTK_VIEWPORT (widget);
gdk_window_set_user_data (viewport->view_window, NULL);
gdk_window_destroy (viewport->view_window);
viewport->view_window = NULL;
gdk_window_set_user_data (viewport->bin_window, NULL);
gdk_window_destroy (viewport->bin_window);
viewport->bin_window = NULL;
if (GTK_WIDGET_CLASS (parent_class)->unrealize)
(* GTK_WIDGET_CLASS (parent_class)->unrealize) (widget);
}
static void
gtk_viewport_paint (GtkWidget *widget,
GdkRectangle *area)
{
GtkViewport *viewport;
g_return_if_fail (GTK_IS_VIEWPORT (widget));
g_return_if_fail (area != NULL);
if (GTK_WIDGET_DRAWABLE (widget))
{
viewport = GTK_VIEWPORT (widget);
gtk_paint_shadow (widget->style, widget->window,
GTK_STATE_NORMAL, viewport->shadow_type,
NULL, widget, "viewport",
0, 0, -1, -1);
}
}
static gint
gtk_viewport_expose (GtkWidget *widget,
GdkEventExpose *event)
{
GtkViewport *viewport;
GtkBin *bin;
if (GTK_WIDGET_DRAWABLE (widget))
{
viewport = GTK_VIEWPORT (widget);
bin = GTK_BIN (widget);
if (event->window == widget->window)
gtk_viewport_paint (widget, &event->area);
else if (event->window == viewport->bin_window)
{
gtk_paint_flat_box(widget->style, viewport->bin_window,
GTK_STATE_NORMAL, GTK_SHADOW_NONE,
&event->area, widget, "viewportbin",
0, 0, -1, -1);
(* GTK_WIDGET_CLASS (parent_class)->expose_event) (widget, event);
}
}
return FALSE;
}
static void
gtk_viewport_add (GtkContainer *container,
GtkWidget *child)
{
GtkBin *bin;
g_return_if_fail (GTK_IS_WIDGET (child));
bin = GTK_BIN (container);
g_return_if_fail (bin->child == NULL);
gtk_widget_set_parent_window (child, GTK_VIEWPORT (bin)->bin_window);
GTK_CONTAINER_CLASS (parent_class)->add (container, child);
}
static void
gtk_viewport_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkViewport *viewport;
GtkBin *bin;
GtkRequisition child_requisition;
viewport = GTK_VIEWPORT (widget);
bin = GTK_BIN (widget);
requisition->width = (GTK_CONTAINER (widget)->border_width +
GTK_WIDGET (widget)->style->xthickness) * 2;
requisition->height = (GTK_CONTAINER (widget)->border_width * 2 +
GTK_WIDGET (widget)->style->ythickness) * 2;
if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
{
gtk_widget_size_request (bin->child, &child_requisition);
requisition->width += child_requisition.width;
requisition->height += child_requisition.height;
}
}
static void
gtk_viewport_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkViewport *viewport = GTK_VIEWPORT (widget);
GtkBin *bin = GTK_BIN (widget);
gint border_width = GTK_CONTAINER (widget)->border_width;
gboolean hadjustment_value_changed, vadjustment_value_changed;
GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport);
GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport);
/* If our size changed, and we have a shadow, queue a redraw on widget->window to
* redraw the shadow correctly.
*/
if (GTK_WIDGET_MAPPED (widget) &&
viewport->shadow_type != GTK_SHADOW_NONE &&
(widget->allocation.width != allocation->width ||
widget->allocation.height != allocation->height))
gdk_window_invalidate_rect (widget->window, NULL, FALSE);
widget->allocation = *allocation;
viewport_set_hadjustment_values (viewport, &hadjustment_value_changed);
viewport_set_vadjustment_values (viewport, &vadjustment_value_changed);
if (GTK_WIDGET_REALIZED (widget))
{
GtkAllocation view_allocation;
viewport_get_view_allocation (viewport, &view_allocation);
gdk_window_move_resize (widget->window,
allocation->x + border_width,
allocation->y + border_width,
allocation->width - border_width * 2,
allocation->height - border_width * 2);
gdk_window_move_resize (viewport->view_window,
view_allocation.x,
view_allocation.y,
view_allocation.width,
view_allocation.height);
}
if (bin->child && GTK_WIDGET_VISIBLE (bin->child))
{
GtkAllocation child_allocation;
child_allocation.x = 0;
child_allocation.y = 0;
child_allocation.width = hadjustment->upper;
child_allocation.height = vadjustment->upper;
if (GTK_WIDGET_REALIZED (widget))
gdk_window_move_resize (viewport->bin_window,
- hadjustment->value,
- vadjustment->value,
child_allocation.width,
child_allocation.height);
gtk_widget_size_allocate (bin->child, &child_allocation);
}
gtk_adjustment_changed (hadjustment);
gtk_adjustment_changed (vadjustment);
if (hadjustment_value_changed)
gtk_adjustment_value_changed (hadjustment);
if (vadjustment_value_changed)
gtk_adjustment_value_changed (vadjustment);
}
static void
gtk_viewport_adjustment_value_changed (GtkAdjustment *adjustment,
gpointer data)
{
GtkViewport *viewport;
GtkBin *bin;
g_return_if_fail (GTK_IS_ADJUSTMENT (adjustment));
g_return_if_fail (GTK_IS_VIEWPORT (data));
viewport = GTK_VIEWPORT (data);
bin = GTK_BIN (data);
if (bin->child && GTK_WIDGET_VISIBLE (bin->child) &&
GTK_WIDGET_REALIZED (viewport))
{
GtkAdjustment *hadjustment = gtk_viewport_get_hadjustment (viewport);
GtkAdjustment *vadjustment = gtk_viewport_get_vadjustment (viewport);
gint old_x, old_y;
gint new_x, new_y;
gdk_window_get_position (viewport->bin_window, &old_x, &old_y);
new_x = - hadjustment->value;
new_y = - vadjustment->value;
if (new_x != old_x || new_y != old_y)
{
gdk_window_move (viewport->bin_window, new_x, new_y);
gdk_window_process_updates (viewport->bin_window, TRUE);
}
}
}
static void
gtk_viewport_style_set (GtkWidget *widget,
GtkStyle *previous_style)
{
GtkViewport *viewport;
if (GTK_WIDGET_REALIZED (widget) &&
!GTK_WIDGET_NO_WINDOW (widget))
{
viewport = GTK_VIEWPORT (widget);
gtk_style_set_background (widget->style, viewport->bin_window, GTK_STATE_NORMAL);
gtk_style_set_background (widget->style, widget->window, widget->state);
}
}
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