gtk2/gtk/gtksizegroup.c

680 lines
16 KiB
C
Raw Normal View History

/* GTK - The GIMP Toolkit
* gtksizegroup.c:
* Copyright (C) 2001 Red Hat Software
*
* 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.
*/
#include "gtkcontainer.h"
#include "gtkintl.h"
#include "gtksignal.h"
#include "gtksizegroup.h"
enum {
PROP_0,
PROP_MODE
};
static void gtk_size_group_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_size_group_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
static void add_group_to_closure (GtkSizeGroup *group,
GtkSizeGroupMode mode,
GSList **groups,
GSList **widgets);
static void add_widget_to_closure (GtkWidget *widget,
GtkSizeGroupMode mode,
GSList **groups,
GSList **widgets);
static GQuark size_groups_quark;
static const gchar *size_groups_tag = "gtk-size-groups";
static GSList *
get_size_groups (GtkWidget *widget)
{
if (!size_groups_quark)
size_groups_quark = g_quark_from_string (size_groups_tag);
return g_object_get_qdata (G_OBJECT (widget), size_groups_quark);
}
static void
set_size_groups (GtkWidget *widget,
GSList *groups)
{
if (!size_groups_quark)
size_groups_quark = g_quark_from_string (size_groups_tag);
g_object_set_qdata (G_OBJECT (widget), size_groups_quark, groups);
}
static void
add_group_to_closure (GtkSizeGroup *group,
GtkSizeGroupMode mode,
GSList **groups,
GSList **widgets)
{
GSList *tmp_widgets;
*groups = g_slist_prepend (*groups, group);
tmp_widgets = group->widgets;
while (tmp_widgets)
{
GtkWidget *tmp_widget = tmp_widgets->data;
if (!g_slist_find (*widgets, tmp_widget))
add_widget_to_closure (tmp_widget, mode, groups, widgets);
tmp_widgets = tmp_widgets->next;
}
}
static void
add_widget_to_closure (GtkWidget *widget,
GtkSizeGroupMode mode,
GSList **groups,
GSList **widgets)
{
GSList *tmp_groups;
*widgets = g_slist_prepend (*widgets, widget);
tmp_groups = get_size_groups (widget);
while (tmp_groups)
{
GtkSizeGroup *tmp_group = tmp_groups->data;
if ((tmp_group->mode == GTK_SIZE_GROUP_BOTH || tmp_group->mode == mode) &&
!g_slist_find (*groups, tmp_group))
add_group_to_closure (tmp_group, mode, groups, widgets);
tmp_groups = tmp_groups->next;
}
}
static void
real_queue_resize (GtkWidget *widget)
{
if (GTK_IS_RESIZE_CONTAINER (widget))
_gtk_container_clear_resize_widgets (GTK_CONTAINER (widget));
if (widget->parent)
_gtk_container_queue_resize (GTK_CONTAINER (widget->parent));
else if (GTK_WIDGET_TOPLEVEL (widget) && GTK_IS_CONTAINER (widget))
_gtk_container_queue_resize (GTK_CONTAINER (widget));
}
static void
reset_group_sizes (GSList *groups)
{
GSList *tmp_list = groups;
while (tmp_list)
{
GtkSizeGroup *tmp_group = tmp_list->data;
tmp_group->have_width = FALSE;
tmp_group->have_height = FALSE;
tmp_list = tmp_list->next;
}
}
static void
queue_resize_on_widget (GtkWidget *widget,
gboolean check_siblings)
{
GtkWidget *parent = widget;
GSList *tmp_list;
while (parent)
{
GSList *widget_groups;
GSList *groups;
GSList *widgets;
if (widget == parent && !check_siblings)
{
real_queue_resize (widget);
parent = parent->parent;
continue;
}
widget_groups = get_size_groups (parent);
if (!widget_groups)
{
if (widget == parent)
real_queue_resize (widget);
parent = parent->parent;
continue;
}
groups = NULL;
widgets = NULL;
add_widget_to_closure (parent, GTK_SIZE_GROUP_HORIZONTAL, &groups, &widgets);
reset_group_sizes (groups);
tmp_list = widgets;
while (tmp_list)
{
if (tmp_list->data == parent)
{
if (widget == parent)
real_queue_resize (parent);
}
else
queue_resize_on_widget (tmp_list->data, FALSE);
tmp_list = tmp_list->next;
}
g_slist_free (widgets);
g_slist_free (groups);
groups = NULL;
widgets = NULL;
add_widget_to_closure (parent, GTK_SIZE_GROUP_VERTICAL, &groups, &widgets);
reset_group_sizes (groups);
tmp_list = widgets;
while (tmp_list)
{
if (tmp_list->data == parent)
{
if (widget == parent)
real_queue_resize (parent);
}
else
queue_resize_on_widget (tmp_list->data, FALSE);
tmp_list = tmp_list->next;
}
g_slist_free (widgets);
g_slist_free (groups);
parent = parent->parent;
}
}
static void
queue_resize_on_group (GtkSizeGroup *size_group)
{
if (size_group->widgets)
queue_resize_on_widget (size_group->widgets->data, TRUE);
}
static void
gtk_size_group_class_init (GtkSizeGroupClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
gobject_class->set_property = gtk_size_group_set_property;
gobject_class->get_property = gtk_size_group_get_property;
g_object_class_install_property (gobject_class,
PROP_MODE,
g_param_spec_enum ("mode",
_("Mode"),
_("The the directions in which the size group effects the requested sizes"
" of its component widgets."),
GTK_TYPE_SIZE_GROUP_MODE,
GTK_SIZE_GROUP_HORIZONTAL,
G_PARAM_READWRITE));
}
static void
gtk_size_group_init (GtkSizeGroup *size_group)
{
size_group->widgets = NULL;
size_group->mode = GTK_SIZE_GROUP_HORIZONTAL;
size_group->have_width = 0;
size_group->have_height = 0;
}
GtkType
gtk_size_group_get_type (void)
{
static GtkType size_group_type = 0;
if (!size_group_type)
{
static const GTypeInfo size_group_info =
{
sizeof (GtkSizeGroupClass),
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gtk_size_group_class_init,
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkSizeGroup),
16, /* n_preallocs */
(GInstanceInitFunc) gtk_size_group_init,
};
size_group_type = g_type_register_static (G_TYPE_OBJECT, "GtkSizeGroup", &size_group_info, 0);
}
return size_group_type;
}
static void
gtk_size_group_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkSizeGroup *size_group = GTK_SIZE_GROUP (object);
switch (prop_id)
{
case PROP_MODE:
gtk_size_group_set_mode (size_group, g_value_get_enum (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_size_group_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkSizeGroup *size_group = GTK_SIZE_GROUP (object);
switch (prop_id)
{
case PROP_MODE:
g_value_set_enum (value, size_group->mode);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/**
* gtk_size_group_new:
* @mode: the mode for the new size group.
*
* Create a new #GtkSizeGroup.
* Return value: a newly created #GtkSizeGroup
**/
GtkSizeGroup *
gtk_size_group_new (GtkSizeGroupMode mode)
{
GtkSizeGroup *size_group = g_object_new (GTK_TYPE_SIZE_GROUP, NULL);
size_group->mode = mode;
return size_group;
}
/**
* gtk_size_group_set_mode:
* @size_group: a #GtkSizeGroup
* @mode: the mode to set for the size group.
*
* Sets the #GtkSizeGroupMode of the size group. The mode of the size
* group determines whether the widgets in the size group should
* all have the same horizontal requisition (%GTK_SIZE_GROUP_MODE_HORIZONTAL)
* all have the same vertical requisition (%GTK_SIZE_GROUP_MODE_VERTICAL),
* or should all have the same requisition in both directions
* (%GTK_SIZE_GROUP_MODE_BOTH).
**/
void
gtk_size_group_set_mode (GtkSizeGroup *size_group,
GtkSizeGroupMode mode)
{
g_return_if_fail (GTK_IS_SIZE_GROUP (size_group));
if (size_group->mode != mode)
{
size_group->mode = mode;
queue_resize_on_group (size_group);
}
}
/**
* gtk_size_group_get_mode:
* @size_group: a #GtkSizeGroup
*
* Gets the current mode of the size group. See gtk_size_group_set_mode().
*
* Return value: the current mode of the size group.
**/
GtkSizeGroupMode
gtk_size_group_get_mode (GtkSizeGroup *size_group)
{
g_return_val_if_fail (GTK_IS_SIZE_GROUP (size_group), GTK_SIZE_GROUP_BOTH);
return size_group->mode;
}
static void
gtk_size_group_widget_destroyed (GtkWidget *widget,
GtkSizeGroup *size_group)
{
gtk_size_group_remove_widget (size_group, widget);
}
/**
* gtk_size_group_add_widget:
* @size_group: a #GtkSizeGroup
* @widget: the #GtkWidget to add
*
* Adds a widget to a #GtkSizeGroup. In the future, the requisition
* of the widget will be determined as the maximum of its requisition
* and the requisition of the other widgets in the size group.
* Whether this applies horizontally, vertically, or in both directions
* depends on the mode of the size group. See gtk_size_group_set_mode().
**/
void
gtk_size_group_add_widget (GtkSizeGroup *size_group,
GtkWidget *widget)
{
GSList *groups;
g_return_if_fail (GTK_IS_SIZE_GROUP (size_group));
g_return_if_fail (GTK_IS_WIDGET (widget));
groups = get_size_groups (widget);
if (!g_slist_find (groups, widget))
{
groups = g_slist_prepend (groups, size_group);
set_size_groups (widget, groups);
size_group->widgets = g_slist_prepend (size_group->widgets, widget);
gtk_signal_connect (GTK_OBJECT (widget), "destroy",
GTK_SIGNAL_FUNC (gtk_size_group_widget_destroyed), size_group);
g_object_ref (G_OBJECT (size_group));
}
queue_resize_on_group (size_group);
}
/**
* gtk_size_group_remove_widget:
* @size_group: a #GtkSizeGrup
* @widget: the #GtkWidget to remove
*
* Removes a widget from a #GtkSizeGroup.
**/
void
gtk_size_group_remove_widget (GtkSizeGroup *size_group,
GtkWidget *widget)
{
GSList *groups;
g_return_if_fail (GTK_IS_SIZE_GROUP (size_group));
g_return_if_fail (GTK_IS_WIDGET (widget));
g_return_if_fail (g_slist_find (size_group->widgets, widget));
gtk_signal_disconnect_by_func (GTK_OBJECT (widget),
GTK_SIGNAL_FUNC (gtk_size_group_widget_destroyed), size_group);
groups = get_size_groups (widget);
groups = g_slist_remove (groups, size_group);
set_size_groups (widget, groups);
size_group->widgets = g_slist_remove (size_group->widgets, widget);
queue_resize_on_group (size_group);
gtk_widget_queue_resize (widget);
g_object_unref (G_OBJECT (size_group));
}
static gint
get_base_dimension (GtkWidget *widget,
GtkSizeGroupMode mode)
{
GtkWidgetAuxInfo *aux_info = _gtk_widget_get_aux_info (widget, FALSE);
if (mode == GTK_SIZE_GROUP_HORIZONTAL)
{
if (aux_info && aux_info->width > 0)
return aux_info->width;
else
return widget->requisition.width;
}
else
{
if (aux_info && aux_info->height > 0)
return aux_info->height;
else
return widget->requisition.height;
}
}
static gint
compute_base_dimension (GtkWidget *widget,
GtkSizeGroupMode mode)
{
gtk_widget_ensure_style (widget);
gtk_signal_emit_by_name (GTK_OBJECT (widget), "size_request", &widget->requisition);
return get_base_dimension (widget, mode);
}
static gint
compute_dimension (GtkWidget *widget,
GtkSizeGroupMode mode)
{
GSList *widgets = NULL;
GSList *groups = NULL;
GSList *tmp_list;
gint result = 0;
add_widget_to_closure (widget, mode, &groups, &widgets);
g_slist_foreach (widgets, (GFunc)g_object_ref, NULL);
if (!groups)
{
result = compute_base_dimension (widget, mode);
}
else
{
GtkSizeGroup *group = groups->data;
if (mode == GTK_SIZE_GROUP_HORIZONTAL && group->have_width)
result = group->requisition.width;
else if (mode == GTK_SIZE_GROUP_VERTICAL && group->have_height)
result = group->requisition.height;
else
{
tmp_list = widgets;
while (tmp_list)
{
GtkWidget *tmp_widget = tmp_list->data;
gint dimension = compute_base_dimension (tmp_widget, mode);
if (dimension > result)
result = dimension;
tmp_list = tmp_list->next;
}
tmp_list = groups;
while (tmp_list)
{
GtkSizeGroup *tmp_group = tmp_list->data;
if (mode == GTK_SIZE_GROUP_HORIZONTAL)
{
tmp_group->have_width = TRUE;
tmp_group->requisition.width = result;
}
else
{
tmp_group->have_height = TRUE;
tmp_group->requisition.height = result;
}
tmp_list = tmp_list->next;
}
}
}
g_slist_foreach (widgets, (GFunc)g_object_unref, NULL);
g_slist_free (widgets);
g_slist_free (groups);
return result;
}
static gint
get_dimension (GtkWidget *widget,
GtkSizeGroupMode mode)
{
GSList *widgets = NULL;
GSList *groups = NULL;
gint result = 0;
add_widget_to_closure (widget, mode, &groups, &widgets);
if (!groups)
{
result = get_base_dimension (widget, mode);
}
else
{
GtkSizeGroup *group = groups->data;
if (mode == GTK_SIZE_GROUP_HORIZONTAL && group->have_width)
result = group->requisition.width;
else if (mode == GTK_SIZE_GROUP_VERTICAL && group->have_height)
result = group->requisition.height;
}
g_slist_free (widgets);
g_slist_free (groups);
return result;
}
static void
get_fast_child_requisition (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkWidgetAuxInfo *aux_info = _gtk_widget_get_aux_info (widget, FALSE);
*requisition = widget->requisition;
if (aux_info)
{
if (aux_info->width > 0)
requisition->width = aux_info->width;
if (aux_info && aux_info->height > 0)
requisition->height = aux_info->height;
}
}
/**
* _gtk_size_group_get_child_requisition:
* @widget: a #GtkWidget
* @requisition: location to store computed requisition.
*
* Retrieve the "child requisition" of the widget, taking account grouping
* of the widget's requisition with other widgets.
**/
void
_gtk_size_group_get_child_requisition (GtkWidget *widget,
GtkRequisition *requisition)
{
if (requisition)
{
if (get_size_groups (widget))
{
requisition->width = get_dimension (widget, GTK_SIZE_GROUP_HORIZONTAL);
requisition->height = get_dimension (widget, GTK_SIZE_GROUP_VERTICAL);
/* Only do the full computation if we actually have size groups */
}
else
get_fast_child_requisition (widget, requisition);
}
}
/**
* _gtk_size_group_compute_requisition:
* @widget: a #GtkWidget
* @requisition: location to store computed requisition.
*
* Compute the requisition of a widget taking into account grouping of
* the widget's requisition with other widgets.
**/
void
_gtk_size_group_compute_requisition (GtkWidget *widget,
GtkRequisition *requisition)
{
gint width;
gint height;
if (get_size_groups (widget))
{
/* Only do the full computation if we actually have size groups */
width = compute_dimension (widget, GTK_SIZE_GROUP_HORIZONTAL);
height = compute_dimension (widget, GTK_SIZE_GROUP_VERTICAL);
if (requisition)
{
requisition->width = width;
requisition->height = height;
}
}
else
{
gtk_widget_ensure_style (widget);
gtk_signal_emit_by_name (GTK_OBJECT (widget), "size_request", &widget->requisition);
if (requisition)
get_fast_child_requisition (widget, requisition);
}
}
/**
* _gtk_size_group_queue_resize:
* @widget: a #GtkWidget
*
* Queue a resize on a widget, and on all other widgets grouped with this widget.
**/
void
_gtk_size_group_queue_resize (GtkWidget *widget)
{
queue_resize_on_widget (widget, TRUE);
}