/* 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 "config.h"
#include "gtkeventbox.h"
#include "gtkprivate.h"
#include "gtkintl.h"
#include "gtkalias.h"
typedef struct
{
gboolean above_child;
GdkWindow *event_window;
} GtkEventBoxPrivate;
enum {
PROP_0,
PROP_VISIBLE_WINDOW,
PROP_ABOVE_CHILD
};
#define GTK_EVENT_BOX_GET_PRIVATE(obj) G_TYPE_INSTANCE_GET_PRIVATE((obj), GTK_TYPE_EVENT_BOX, GtkEventBoxPrivate)
static void gtk_event_box_realize (GtkWidget *widget);
static void gtk_event_box_unrealize (GtkWidget *widget);
static void gtk_event_box_map (GtkWidget *widget);
static void gtk_event_box_unmap (GtkWidget *widget);
static void gtk_event_box_size_request (GtkWidget *widget,
GtkRequisition *requisition);
static void gtk_event_box_size_allocate (GtkWidget *widget,
GtkAllocation *allocation);
static void gtk_event_box_paint (GtkWidget *widget,
GdkRectangle *area);
static gboolean gtk_event_box_expose (GtkWidget *widget,
GdkEventExpose *event);
static void gtk_event_box_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec);
static void gtk_event_box_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec);
G_DEFINE_TYPE (GtkEventBox, gtk_event_box, GTK_TYPE_BIN)
static void
gtk_event_box_class_init (GtkEventBoxClass *class)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (class);
GtkWidgetClass *widget_class = GTK_WIDGET_CLASS (class);
gobject_class->set_property = gtk_event_box_set_property;
gobject_class->get_property = gtk_event_box_get_property;
widget_class->realize = gtk_event_box_realize;
widget_class->unrealize = gtk_event_box_unrealize;
widget_class->map = gtk_event_box_map;
widget_class->unmap = gtk_event_box_unmap;
widget_class->size_request = gtk_event_box_size_request;
widget_class->size_allocate = gtk_event_box_size_allocate;
widget_class->expose_event = gtk_event_box_expose;
g_object_class_install_property (gobject_class,
PROP_VISIBLE_WINDOW,
g_param_spec_boolean ("visible-window",
P_("Visible Window"),
P_("Whether the event box is visible, as opposed to invisible and only used to trap events."),
TRUE,
GTK_PARAM_READWRITE));
g_object_class_install_property (gobject_class,
PROP_ABOVE_CHILD,
g_param_spec_boolean ("above-child",
P_("Above child"),
P_("Whether the event-trapping window of the eventbox is above the window of the child widget as opposed to below it."),
FALSE,
GTK_PARAM_READWRITE));
g_type_class_add_private (class, sizeof (GtkEventBoxPrivate));
}
static void
gtk_event_box_init (GtkEventBox *event_box)
{
GtkEventBoxPrivate *priv;
gtk_widget_set_has_window (GTK_WIDGET (event_box), TRUE);
priv = GTK_EVENT_BOX_GET_PRIVATE (event_box);
priv->above_child = FALSE;
}
GtkWidget*
gtk_event_box_new (void)
{
return g_object_new (GTK_TYPE_EVENT_BOX, NULL);
}
static void
gtk_event_box_set_property (GObject *object,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
GtkEventBox *event_box;
event_box = GTK_EVENT_BOX (object);
switch (prop_id)
{
case PROP_VISIBLE_WINDOW:
gtk_event_box_set_visible_window (event_box, g_value_get_boolean (value));
break;
case PROP_ABOVE_CHILD:
gtk_event_box_set_above_child (event_box, g_value_get_boolean (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gtk_event_box_get_property (GObject *object,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
GtkEventBox *event_box;
event_box = GTK_EVENT_BOX (object);
switch (prop_id)
{
case PROP_VISIBLE_WINDOW:
g_value_set_boolean (value, gtk_event_box_get_visible_window (event_box));
break;
case PROP_ABOVE_CHILD:
g_value_set_boolean (value, gtk_event_box_get_above_child (event_box));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/**
* gtk_event_box_get_visible_window:
* @event_box: a #GtkEventBox
*
* Returns whether the event box has a visible window.
* See gtk_event_box_set_visible_window() for details.
*
* Return value: %TRUE if the event box window is visible
*
* Since: 2.4
**/
gboolean
gtk_event_box_get_visible_window (GtkEventBox *event_box)
{
g_return_val_if_fail (GTK_IS_EVENT_BOX (event_box), FALSE);
return gtk_widget_get_has_window (GTK_WIDGET (event_box));
}
/**
* gtk_event_box_set_visible_window:
* @event_box: a #GtkEventBox
* @visible_window: boolean value
*
* Set whether the event box uses a visible or invisible child
* window. The default is to use visible windows.
*
* In an invisible window event box, the window that the
* event box creates is a %GDK_INPUT_ONLY window, which
* means that it is invisible and only serves to receive
* events.
*
* A visible window event box creates a visible (%GDK_INPUT_OUTPUT)
* window that acts as the parent window for all the widgets
* contained in the event box.
*
* You should generally make your event box invisible if
* you just want to trap events. Creating a visible window
* may cause artifacts that are visible to the user, especially
* if the user is using a theme with gradients or pixmaps.
*
* The main reason to create a non input-only event box is if
* you want to set the background to a different color or
* draw on it.
*
* <note><para>
* There is one unexpected issue for an invisible event box that has its
* window below the child. (See gtk_event_box_set_above_child().)
* Since the input-only window is not an ancestor window of any windows
* that descendent widgets of the event box create, events on these
* windows aren't propagated up by the windowing system, but only by GTK+.
* The practical effect of this is if an event isn't in the event
* mask for the descendant window (see gtk_widget_add_events()),
* it won't be received by the event box.
* </para><para>
* This problem doesn't occur for visible event boxes, because in
* that case, the event box window is actually the ancestor of the
* descendant windows, not just at the same place on the screen.
* </para></note>
*
* Since: 2.4
**/
void
gtk_event_box_set_visible_window (GtkEventBox *event_box,
gboolean visible_window)
{
GtkWidget *widget;
g_return_if_fail (GTK_IS_EVENT_BOX (event_box));
widget = GTK_WIDGET (event_box);
visible_window = visible_window != FALSE;
if (visible_window != gtk_widget_get_has_window (widget))
{
if (gtk_widget_get_realized (widget))
{
gboolean visible = gtk_widget_get_visible (widget);
if (visible)
gtk_widget_hide (widget);
gtk_widget_unrealize (widget);
gtk_widget_set_has_window (widget, visible_window);
gtk_widget_realize (widget);
if (visible)
gtk_widget_show (widget);
}
else
{
gtk_widget_set_has_window (widget, visible_window);
}
if (gtk_widget_get_visible (widget))
gtk_widget_queue_resize (widget);
g_object_notify (G_OBJECT (event_box), "visible-window");
}
}
/**
* gtk_event_box_get_above_child:
* @event_box: a #GtkEventBox
*
* Returns whether the event box window is above or below the
* windows of its child. See gtk_event_box_set_above_child() for
* details.
*
* Return value: %TRUE if the event box window is above the window
* of its child.
*
* Since: 2.4
**/
gboolean
gtk_event_box_get_above_child (GtkEventBox *event_box)
{
GtkEventBoxPrivate *priv;
g_return_val_if_fail (GTK_IS_EVENT_BOX (event_box), FALSE);
priv = GTK_EVENT_BOX_GET_PRIVATE (event_box);
return priv->above_child;
}
/**
* gtk_event_box_set_above_child:
* @event_box: a #GtkEventBox
* @above_child: %TRUE if the event box window is above the windows of its child
*
* Set whether the event box window is positioned above the windows of its child,
* as opposed to below it. If the window is above, all events inside the
* event box will go to the event box. If the window is below, events
* in windows of child widgets will first got to that widget, and then
* to its parents.
*
* The default is to keep the window below the child.
*
* Since: 2.4
**/
void
gtk_event_box_set_above_child (GtkEventBox *event_box,
gboolean above_child)
{
GtkWidget *widget;
GtkEventBoxPrivate *priv;
g_return_if_fail (GTK_IS_EVENT_BOX (event_box));
widget = GTK_WIDGET (event_box);
priv = GTK_EVENT_BOX_GET_PRIVATE (event_box);
above_child = above_child != FALSE;
if (priv->above_child != above_child)
{
priv->above_child = above_child;
if (gtk_widget_get_realized (widget))
{
if (!gtk_widget_get_has_window (widget))
{
if (above_child)
gdk_window_raise (priv->event_window);
else
gdk_window_lower (priv->event_window);
}
else
{
gboolean visible = gtk_widget_get_visible (widget);
if (visible)
gtk_widget_hide (widget);
gtk_widget_unrealize (widget);
gtk_widget_realize (widget);
if (visible)
gtk_widget_show (widget);
}
}
if (gtk_widget_get_visible (widget))
gtk_widget_queue_resize (widget);
g_object_notify (G_OBJECT (event_box), "above-child");
}
}
static void
gtk_event_box_realize (GtkWidget *widget)
{
GdkWindowAttr attributes;
gint attributes_mask;
gint border_width;
GtkEventBoxPrivate *priv;
gboolean visible_window;
gtk_widget_set_realized (widget, TRUE);
border_width = GTK_CONTAINER (widget)->border_width;
attributes.x = widget->allocation.x + border_width;
attributes.y = widget->allocation.y + border_width;
attributes.width = widget->allocation.width - 2*border_width;
attributes.height = widget->allocation.height - 2*border_width;
attributes.window_type = GDK_WINDOW_CHILD;
attributes.event_mask = gtk_widget_get_events (widget)
| GDK_BUTTON_MOTION_MASK
| GDK_BUTTON_PRESS_MASK
| GDK_BUTTON_RELEASE_MASK
| GDK_EXPOSURE_MASK
| GDK_ENTER_NOTIFY_MASK
| GDK_LEAVE_NOTIFY_MASK;
priv = GTK_EVENT_BOX_GET_PRIVATE (widget);
visible_window = gtk_widget_get_has_window (widget);
if (visible_window)
{
attributes.visual = gtk_widget_get_visual (widget);
attributes.colormap = gtk_widget_get_colormap (widget);
attributes.wclass = GDK_INPUT_OUTPUT;
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, widget);
}
else
{
widget->window = gtk_widget_get_parent_window (widget);
g_object_ref (widget->window);
}
if (!visible_window || priv->above_child)
{
attributes.wclass = GDK_INPUT_ONLY;
if (!visible_window)
attributes_mask = GDK_WA_X | GDK_WA_Y;
else
attributes_mask = 0;
priv->event_window = gdk_window_new (widget->window,
&attributes, attributes_mask);
gdk_window_set_user_data (priv->event_window, widget);
}
widget->style = gtk_style_attach (widget->style, widget->window);
if (visible_window)
gtk_style_set_background (widget->style, widget->window, GTK_STATE_NORMAL);
}
static void
gtk_event_box_unrealize (GtkWidget *widget)
{
GtkEventBoxPrivate *priv;
priv = GTK_EVENT_BOX_GET_PRIVATE (widget);
if (priv->event_window != NULL)
{
gdk_window_set_user_data (priv->event_window, NULL);
gdk_window_destroy (priv->event_window);
priv->event_window = NULL;
}
GTK_WIDGET_CLASS (gtk_event_box_parent_class)->unrealize (widget);
}
static void
gtk_event_box_map (GtkWidget *widget)
{
GtkEventBoxPrivate *priv;
priv = GTK_EVENT_BOX_GET_PRIVATE (widget);
if (priv->event_window != NULL && !priv->above_child)
gdk_window_show (priv->event_window);
GTK_WIDGET_CLASS (gtk_event_box_parent_class)->map (widget);
if (priv->event_window != NULL && priv->above_child)
gdk_window_show (priv->event_window);
}
static void
gtk_event_box_unmap (GtkWidget *widget)
{
GtkEventBoxPrivate *priv;
priv = GTK_EVENT_BOX_GET_PRIVATE (widget);
if (priv->event_window != NULL)
gdk_window_hide (priv->event_window);
GTK_WIDGET_CLASS (gtk_event_box_parent_class)->unmap (widget);
}
static void
gtk_event_box_size_request (GtkWidget *widget,
GtkRequisition *requisition)
{
GtkBin *bin = GTK_BIN (widget);
requisition->width = GTK_CONTAINER (widget)->border_width * 2;
requisition->height = GTK_CONTAINER (widget)->border_width * 2;
if (bin->child && gtk_widget_get_visible (bin->child))
{
GtkRequisition child_requisition;
gtk_widget_size_request (bin->child, &child_requisition);
requisition->width += child_requisition.width;
requisition->height += child_requisition.height;
}
}
static void
gtk_event_box_size_allocate (GtkWidget *widget,
GtkAllocation *allocation)
{
GtkBin *bin;
GtkAllocation child_allocation;
GtkEventBoxPrivate *priv;
widget->allocation = *allocation;
bin = GTK_BIN (widget);
if (!gtk_widget_get_has_window (widget))
{
child_allocation.x = allocation->x + GTK_CONTAINER (widget)->border_width;
child_allocation.y = allocation->y + GTK_CONTAINER (widget)->border_width;
}
else
{
child_allocation.x = 0;
child_allocation.y = 0;
}
child_allocation.width = MAX (allocation->width - GTK_CONTAINER (widget)->border_width * 2, 0);
child_allocation.height = MAX (allocation->height - GTK_CONTAINER (widget)->border_width * 2, 0);
if (gtk_widget_get_realized (widget))
{
priv = GTK_EVENT_BOX_GET_PRIVATE (widget);
if (priv->event_window != NULL)
gdk_window_move_resize (priv->event_window,
child_allocation.x,
child_allocation.y,
child_allocation.width,
child_allocation.height);
if (gtk_widget_get_has_window (widget))
gdk_window_move_resize (widget->window,
allocation->x + GTK_CONTAINER (widget)->border_width,
allocation->y + GTK_CONTAINER (widget)->border_width,
child_allocation.width,
child_allocation.height);
}
if (bin->child)
gtk_widget_size_allocate (bin->child, &child_allocation);
}
static void
gtk_event_box_paint (GtkWidget *widget,
GdkRectangle *area)
{
if (!gtk_widget_get_app_paintable (widget))
gtk_paint_flat_box (widget->style, widget->window,
widget->state, GTK_SHADOW_NONE,
area, widget, "eventbox",
0, 0, -1, -1);
}
static gboolean
gtk_event_box_expose (GtkWidget *widget,
GdkEventExpose *event)
{
if (gtk_widget_is_drawable (widget))
{
if (gtk_widget_get_has_window (widget))
gtk_event_box_paint (widget, &event->area);
GTK_WIDGET_CLASS (gtk_event_box_parent_class)->expose_event (widget, event);
}
return FALSE;
}
#define __GTK_EVENT_BOX_C__
#include "gtkaliasdef.c"