Desktop
/* $Id: systray.c,v 1.12 2012/01/07 02:58:13 khorben Exp $ */
/* Copyright (c) 2010-2012 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS Pager Panel */
/* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 3 of the License.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "Panel.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#if GTK_CHECK_VERSION(3, 0, 0)
# include <gtk/gtkx.h>
#endif
#include <gdk/gdkx.h>
#include <X11/Xatom.h>
/* Systray */
/* private */
/* types */
typedef struct _PanelApplet
{
PanelAppletHelper * helper;
GtkWidget * hbox;
GtkWidget * owner;
} Systray;
/* constants */
#define SYSTEM_TRAY_REQUEST_DOCK 0
#define SYSTEM_TRAY_BEGIN_MESSAGE 1
#define SYSTEM_TRAY_CANCEL_MESSAGE 2
/* prototypes */
static Systray * _systray_init(PanelAppletHelper * helper, GtkWidget ** widget);
static void _systray_destroy(Systray * systray);
/* callbacks */
static GdkFilterReturn _on_filter(GdkXEvent * xevent, GdkEvent * event,
gpointer data);
static void _on_screen_changed(GtkWidget * widget, GdkScreen * previous,
gpointer data);
/* public */
/* variables */
PanelAppletDefinition applet =
{
"System tray",
"gnome-monitor",
NULL,
_systray_init,
_systray_destroy,
NULL,
FALSE,
TRUE
};
/* private */
/* functions */
/* systray_init */
static Systray * _systray_init(PanelAppletHelper * helper, GtkWidget ** widget)
{
Systray * systray;
gint height = 24;
if((systray = malloc(sizeof(*systray))) == NULL)
{
helper->error(NULL, "malloc", 1);
return NULL;
}
systray->helper = helper;
systray->hbox = gtk_hbox_new(FALSE, 0);
gtk_icon_size_lookup(helper->icon_size, NULL, &height);
gtk_widget_set_size_request(systray->hbox, -1, height);
systray->owner = gtk_invisible_new();
g_signal_connect(G_OBJECT(systray->hbox), "screen-changed", G_CALLBACK(
_on_screen_changed), systray);
gtk_widget_show(systray->hbox);
*widget = systray->hbox;
return systray;
}
/* systray_destroy */
static void _systray_destroy(Systray * systray)
{
gtk_widget_destroy(systray->hbox);
free(systray);
}
/* callbacks */
/* on_filter */
static GdkFilterReturn _filter_clientmessage(Systray * systray,
XClientMessageEvent * xev);
static GdkFilterReturn _on_filter(GdkXEvent * xevent, GdkEvent * event,
gpointer data)
{
Systray * systray = data;
XEvent * xev = xevent;
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s()\n", __func__);
#endif
if(xev->type == ClientMessage)
return _filter_clientmessage(systray, &xev->xclient);
return GDK_FILTER_CONTINUE;
}
static GdkFilterReturn _filter_clientmessage(Systray * systray,
XClientMessageEvent * xev)
{
GtkWidget * socket;
switch(xev->data.l[1])
{
case SYSTEM_TRAY_REQUEST_DOCK:
if(xev->data.l[2] == 0)
return GDK_FILTER_CONTINUE;
socket = gtk_socket_new();
gtk_widget_show(socket);
gtk_box_pack_start(GTK_BOX(systray->hbox), socket,
FALSE, TRUE, 0);
gtk_socket_add_id(GTK_SOCKET(socket), xev->data.l[2]);
#ifdef DEBUG
fprintf(stderr, "DEBUG: %s() %ld\n", __func__,
xev->data.l[2]);
#endif
return GDK_FILTER_REMOVE;
}
return GDK_FILTER_CONTINUE;
}
/* on_screen_changed */
static void _on_screen_changed(GtkWidget * widget, GdkScreen * previous,
gpointer data)
{
Systray * systray = data;
const char name[] = "_NET_SYSTEM_TRAY_S";
char buf[sizeof(name) + 2];
GdkAtom atom;
GdkScreen * screen;
GdkDisplay * display;
GdkWindow * root;
XEvent xev;
screen = gtk_widget_get_screen(widget);
snprintf(buf, sizeof(buf), "%s%d", name, gdk_screen_get_number(screen));
atom = gdk_atom_intern(buf, FALSE);
gtk_widget_realize(systray->owner);
if(gdk_selection_owner_set(systray->owner->window, atom,
gtk_get_current_event_time(), TRUE) != TRUE)
return;
display = gtk_widget_get_display(widget);
root = gdk_screen_get_root_window(screen);
xev.xclient.type = ClientMessage;
xev.xclient.window = GDK_WINDOW_XWINDOW(root);
xev.xclient.message_type = gdk_x11_get_xatom_by_name_for_display(
display, "MANAGER");
xev.xclient.format = 32;
xev.xclient.data.l[0] = gtk_get_current_event_time();
xev.xclient.data.l[1] = gdk_x11_atom_to_xatom(atom);
xev.xclient.data.l[2] = GDK_WINDOW_XWINDOW(systray->owner->window);
XSendEvent(GDK_DISPLAY_XDISPLAY(display), GDK_WINDOW_XWINDOW(root),
False, StructureNotifyMask, &xev);
memset(&xev.xclient.data, 0, sizeof(xev.xclient.data));
gtk_widget_add_events(systray->owner, GDK_PROPERTY_CHANGE_MASK
| GDK_STRUCTURE_MASK);
gdk_window_add_filter(systray->owner->window, _on_filter, systray);
}