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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
* vim:expandtab:shiftwidth=2:tabstop=2: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is the Gtk2XtBin Widget Implementation.
*
* The Initial Developer of the Original Code is
* Sun Microsystems, Inc.
* Portions created by the Initial Developer are Copyright (C) 2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
/*
* The GtkXtBin widget allows for Xt toolkit code to be used
* inside a GTK application.
*/
#include "xembed.h"
#include "gtk2xtbin.h"
#include <gtk/gtk.h>
#include <gdk/gdkx.h>
#include <glib.h>
#include <assert.h>
#include <sys/time.h>
#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
/* Xlib/Xt stuff */
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/Shell.h>
#include <X11/Intrinsic.h>
#include <X11/StringDefs.h>
/* uncomment this if you want debugging information about widget
creation and destruction */
#undef DEBUG_XTBIN
#define XTBIN_MAX_EVENTS 30
static void gtk_xtbin_class_init (GtkXtBinClass *klass);
static void gtk_xtbin_init (GtkXtBin *xtbin);
static void gtk_xtbin_realize (GtkWidget *widget);
static void gtk_xtbin_unrealize (GtkWidget *widget);
static void gtk_xtbin_destroy (GtkObject *object);
static void gtk_xtbin_shutdown (GtkObject *object);
/* Xt aware XEmbed */
static void xt_client_init (XtClient * xtclient,
Visual *xtvisual,
Colormap xtcolormap,
int xtdepth);
static void xt_client_create (XtClient * xtclient,
Window embeder,
int height,
int width );
static void xt_client_unrealize (XtClient* xtclient);
static void xt_client_destroy (XtClient* xtclient);
static void xt_client_set_info (Widget xtplug,
unsigned long flags);
static void xt_client_event_handler (Widget w,
XtPointer client_data,
XEvent *event);
static void xt_client_handle_xembed_message (Widget w,
XtPointer client_data,
XEvent *event);
static void xt_client_focus_listener (Widget w,
XtPointer user_data,
XEvent *event);
static void xt_add_focus_listener( Widget w, XtPointer user_data );
static void xt_add_focus_listener_tree ( Widget treeroot, XtPointer user_data);
static void xt_remove_focus_listener(Widget w, XtPointer user_data);
static void send_xembed_message (XtClient *xtclient,
long message,
long detail,
long data1,
long data2,
long time);
static int error_handler (Display *display,
XErrorEvent *error);
/* For error trap of XEmbed */
static void trap_errors(void);
static int untrap_error(void);
static int (*old_error_handler) (Display *, XErrorEvent *);
static int trapped_error_code = 0;
static GtkWidgetClass *parent_class = NULL;
static Display *xtdisplay = NULL;
static String *fallback = NULL;
static gboolean xt_is_initialized = FALSE;
static gint num_widgets = 0;
static GPollFD xt_event_poll_fd;
static gint xt_polling_timer_id = 0;
static guint tag = 0;
static gboolean
xt_event_prepare (GSource* source_data,
gint *timeout)
{
int mask;
GDK_THREADS_ENTER();
mask = XPending(xtdisplay);
GDK_THREADS_LEAVE();
return (gboolean)mask;
}
static gboolean
xt_event_check (GSource* source_data)
{
GDK_THREADS_ENTER ();
if (xt_event_poll_fd.revents & G_IO_IN) {
int mask;
mask = XPending(xtdisplay);
GDK_THREADS_LEAVE ();
return (gboolean)mask;
}
GDK_THREADS_LEAVE ();
return FALSE;
}
static gboolean
xt_event_dispatch (GSource* source_data,
GSourceFunc call_back,
gpointer user_data)
{
XEvent event;
XtAppContext ac;
int i = 0;
ac = XtDisplayToApplicationContext(xtdisplay);
GDK_THREADS_ENTER ();
/* Process only real X traffic here. We only look for data on the
* pipe, limit it to XTBIN_MAX_EVENTS and only call
* XtAppProcessEvent so that it will look for X events. There's no
* timer processing here since we already have a timer callback that
* does it. */
for (i=0; i < XTBIN_MAX_EVENTS && XPending(xtdisplay); i++) {
XtAppProcessEvent(ac, XtIMXEvent);
}
GDK_THREADS_LEAVE ();
return TRUE;
}
static GSourceFuncs xt_event_funcs = {
xt_event_prepare,
xt_event_check,
xt_event_dispatch,
g_free,
(GSourceFunc)NULL,
(GSourceDummyMarshal)NULL
};
static gboolean
xt_event_polling_timer_callback(gpointer user_data)
{
Display * display;
XtAppContext ac;
int eventsToProcess = 20;
display = (Display *)user_data;
ac = XtDisplayToApplicationContext(display);
/* We need to process many Xt events here. If we just process
one event we might starve one or more Xt consumers. On the other hand
this could hang the whole app if Xt events come pouring in. So process
up to 20 Xt events right now and save the rest for later. This is a hack,
but it oughta work. We *really* should have out of process plugins.
*/
while (eventsToProcess-- && XtAppPending(ac))
XtAppProcessEvent(ac, XtIMAll);
return TRUE;
}
GType
gtk_xtbin_get_type (void)
{
static GType xtbin_type = 0;
if (!xtbin_type) {
static const GTypeInfo xtbin_info =
{
sizeof (GtkXtBinClass), /* class_size */
NULL, /* base_init */
NULL, /* base_finalize */
(GClassInitFunc) gtk_xtbin_class_init, /* class_init */
NULL, /* class_finalize */
NULL, /* class_data */
sizeof (GtkXtBin), /* instance_size */
0, /* n_preallocs */
(GInstanceInitFunc) gtk_xtbin_init, /* instance_init */
NULL /* value_table */
};
xtbin_type = g_type_register_static(GTK_TYPE_SOCKET, "GtkXtBin",
&xtbin_info, 0);
}
return xtbin_type;
}
static void
gtk_xtbin_class_init (GtkXtBinClass *klass)
{
GtkWidgetClass *widget_class;
GtkObjectClass *object_class;
parent_class = g_type_class_peek_parent(klass);
widget_class = GTK_WIDGET_CLASS (klass);
widget_class->realize = gtk_xtbin_realize;
widget_class->unrealize = gtk_xtbin_unrealize;
object_class = GTK_OBJECT_CLASS (klass);
object_class->destroy = gtk_xtbin_destroy;
}
static void
gtk_xtbin_init (GtkXtBin *xtbin)
{
xtbin->xtdisplay = NULL;
xtbin->parent_window = NULL;
xtbin->xtwindow = 0;
xtbin->x = 0;
xtbin->y = 0;
}
static void
gtk_xtbin_realize (GtkWidget *widget)
{
GtkXtBin *xtbin;
GtkAllocation allocation = { 0, 0, 200, 200 };
gint x, y, w, h, d; /* geometry of window */
#ifdef DEBUG_XTBIN
printf("gtk_xtbin_realize()\n");
#endif
g_return_if_fail (GTK_IS_XTBIN (widget));
xtbin = GTK_XTBIN (widget);
/* caculate the allocation before realize */
gdk_window_get_geometry(xtbin->parent_window, &x, &y, &w, &h, &d);
allocation.width = w;
allocation.height = h;
gtk_widget_size_allocate (widget, &allocation);
#ifdef DEBUG_XTBIN
printf("initial allocation %d %d %d %d\n", x, y, w, h);
#endif
xtbin->width = widget->allocation.width;
xtbin->height = widget->allocation.height;
/* use GtkSocket's realize */
(*GTK_WIDGET_CLASS(parent_class)->realize)(widget);
/* create the Xt client widget */
xt_client_create(&(xtbin->xtclient),
gtk_socket_get_id(GTK_SOCKET(xtbin)),
xtbin->height,
xtbin->width);
xtbin->xtwindow = XtWindow(xtbin->xtclient.child_widget);
gdk_flush();
/* now that we have created the xt client, add it to the socket. */
gtk_socket_add_id(GTK_SOCKET(widget), xtbin->xtwindow);
}
GtkWidget*
gtk_xtbin_new (GdkWindow *parent_window, String * f)
{
GtkXtBin *xtbin;
gpointer user_data;
assert(parent_window != NULL);
xtbin = g_object_new (GTK_TYPE_XTBIN, NULL);
if (!xtbin)
return (GtkWidget*)NULL;
if (f)
fallback = f;
/* Initialize the Xt toolkit */
xtbin->parent_window = parent_window;
xt_client_init(&(xtbin->xtclient),
GDK_VISUAL_XVISUAL(gdk_rgb_get_visual()),
GDK_COLORMAP_XCOLORMAP(gdk_rgb_get_colormap()),
gdk_rgb_get_visual()->depth);
if (!xtbin->xtclient.xtdisplay) {
/* If XtOpenDisplay failed, we can't go any further.
* Bail out.
*/
#ifdef DEBUG_XTBIN
printf("gtk_xtbin_init: XtOpenDisplay() returned NULL.\n");
#endif
g_free (xtbin);
return (GtkWidget *)NULL;
}
/* If this is the first running widget, hook this display into the
mainloop */
if (0 == num_widgets) {
int cnumber;
/*
* hook Xt event loop into the glib event loop.
*/
/* the assumption is that gtk_init has already been called */
GSource* gs = g_source_new(&xt_event_funcs, sizeof(GSource));
if (!gs) {
return NULL;
}
g_source_set_priority(gs, GDK_PRIORITY_EVENTS);
g_source_set_can_recurse(gs, TRUE);
tag = g_source_attach(gs, (GMainContext*)NULL);
#ifdef VMS
cnumber = XConnectionNumber(xtdisplay);
#else
cnumber = ConnectionNumber(xtdisplay);
#endif
xt_event_poll_fd.fd = cnumber;
xt_event_poll_fd.events = G_IO_IN;
xt_event_poll_fd.revents = 0; /* hmm... is this correct? */
g_main_context_add_poll ((GMainContext*)NULL,
&xt_event_poll_fd,
G_PRIORITY_LOW);
/* add a timer so that we can poll and process Xt timers */
xt_polling_timer_id =
g_timeout_add(25,
(GtkFunction)xt_event_polling_timer_callback,
xtdisplay);
}
/* Bump up our usage count */
num_widgets++;
/* Build the hierachy */
xtbin->xtdisplay = xtbin->xtclient.xtdisplay;
gtk_widget_set_parent_window(GTK_WIDGET(xtbin), parent_window);
gdk_window_get_user_data(xtbin->parent_window, &user_data);
if (user_data)
gtk_container_add(GTK_CONTAINER(user_data), GTK_WIDGET(xtbin));
/* This GtkSocket has a visible window, but the Xt plug will cover this
* window. Normally GtkSockets let the X server paint their background and
* this would happen immediately (before the plug is mapped). Setting the
* background to None prevents the server from painting this window,
* avoiding flicker.
*/
gtk_widget_realize(GTK_WIDGET(xtbin));
gdk_window_set_back_pixmap(GTK_WIDGET(xtbin)->window, NULL, FALSE);
return GTK_WIDGET (xtbin);
}
void
gtk_xtbin_set_position (GtkXtBin *xtbin,
gint x,
gint y)
{
xtbin->x = x;
xtbin->y = y;
if (GTK_WIDGET_REALIZED (xtbin))
gdk_window_move (GTK_WIDGET (xtbin)->window, x, y);
}
void
gtk_xtbin_resize (GtkWidget *widget,
gint width,
gint height)
{
Arg args[2];
GtkXtBin *xtbin = GTK_XTBIN (widget);
GtkAllocation allocation;
#ifdef DEBUG_XTBIN
printf("gtk_xtbin_resize %p %d %d\n", (void *)widget, width, height);
#endif
xtbin->height = height;
xtbin->width = width;
/* Avoid BadValue errors in XtSetValues */
if (height <= 0 || width <=0) {
height = 1;
width = 1;
}
XtSetArg(args[0], XtNheight, height);
XtSetArg(args[1], XtNwidth, width);
if (xtbin->xtclient.top_widget)
XtSetValues(xtbin->xtclient.top_widget, args, 2);
/* we need to send a size allocate so the socket knows about the
size changes */
allocation.x = xtbin->x;
allocation.y = xtbin->y;
allocation.width = xtbin->width;
allocation.height = xtbin->height;
gtk_widget_size_allocate(widget, &allocation);
}
static void
gtk_xtbin_unrealize (GtkWidget *object)
{
GtkXtBin *xtbin;
GtkWidget *widget;
#ifdef DEBUG_XTBIN
printf("gtk_xtbin_unrealize()\n");
#endif
/* gtk_object_destroy() will already hold a refcount on object
*/
xtbin = GTK_XTBIN(object);
widget = GTK_WIDGET(object);
GTK_WIDGET_UNSET_FLAGS (widget, GTK_VISIBLE);
if (GTK_WIDGET_REALIZED (widget)) {
xt_client_unrealize(&(xtbin->xtclient));
}
(*GTK_WIDGET_CLASS (parent_class)->unrealize)(widget);
}
static void
gtk_xtbin_destroy (GtkObject *object)
{
GtkXtBin *xtbin;
#ifdef DEBUG_XTBIN
printf("gtk_xtbin_destroy()\n");
#endif
g_return_if_fail (object != NULL);
g_return_if_fail (GTK_IS_XTBIN (object));
xtbin = GTK_XTBIN (object);
if(xtbin->xtwindow) {
/* remove the event handler */
xt_client_destroy(&(xtbin->xtclient));
xtbin->xtwindow = 0;
num_widgets--; /* reduce our usage count */
/* If this is the last running widget, remove the Xt display
connection from the mainloop */
if (0 == num_widgets) {
#ifdef DEBUG_XTBIN
printf("removing the Xt connection from the main loop\n");
#endif
g_main_context_remove_poll((GMainContext*)NULL, &xt_event_poll_fd);
g_source_remove(tag);
g_source_remove(xt_polling_timer_id);
xt_polling_timer_id = 0;
}
}
GTK_OBJECT_CLASS(parent_class)->destroy(object);
}
/*
* Following is the implementation of Xt XEmbedded for client side
*/
/* Initial Xt plugin */
static void
xt_client_init( XtClient * xtclient,
Visual *xtvisual,
Colormap xtcolormap,
int xtdepth)
{
XtAppContext app_context;
char *mArgv[1];
int mArgc = 0;
/*
* Initialize Xt stuff
*/
xtclient->top_widget = NULL;
xtclient->child_widget = NULL;
xtclient->xtdisplay = NULL;
xtclient->xtvisual = NULL;
xtclient->xtcolormap = 0;
xtclient->xtdepth = 0;
if (!xt_is_initialized) {
#ifdef DEBUG_XTBIN
printf("starting up Xt stuff\n");
#endif
XtToolkitInitialize();
app_context = XtCreateApplicationContext();
if (fallback)
XtAppSetFallbackResources(app_context, fallback);
xtdisplay = XtOpenDisplay(app_context, gdk_get_display(), NULL,
"Wrapper", NULL, 0, &mArgc, mArgv);
if (xtdisplay)
xt_is_initialized = TRUE;
}
xtclient->xtdisplay = xtdisplay;
xtclient->xtvisual = xtvisual;
xtclient->xtcolormap = xtcolormap;
xtclient->xtdepth = xtdepth;
}
/* Create the Xt client widgets
* */
static void
xt_client_create ( XtClient* xtclient ,
Window embedderid,
int height,
int width )
{
int n;
Arg args[6];
Widget child_widget;
Widget top_widget;
#ifdef DEBUG_XTBIN
printf("xt_client_create() \n");
#endif
top_widget = XtAppCreateShell("drawingArea", "Wrapper",
applicationShellWidgetClass,
xtclient->xtdisplay,
NULL, 0);
xtclient->top_widget = top_widget;
/* set size of Xt window */
n = 0;
XtSetArg(args[n], XtNheight, height);n++;
XtSetArg(args[n], XtNwidth, width);n++;
XtSetValues(top_widget, args, n);
child_widget = XtVaCreateWidget("form",
compositeWidgetClass,
top_widget, NULL);
n = 0;
XtSetArg(args[n], XtNheight, height);n++;
XtSetArg(args[n], XtNwidth, width);n++;
XtSetArg(args[n], XtNvisual, xtclient->xtvisual ); n++;
XtSetArg(args[n], XtNdepth, xtclient->xtdepth ); n++;
XtSetArg(args[n], XtNcolormap, xtclient->xtcolormap ); n++;
XtSetArg(args[n], XtNborderWidth, 0); n++;
XtSetValues(child_widget, args, n);
XSync(xtclient->xtdisplay, FALSE);
xtclient->oldwindow = top_widget->core.window;
top_widget->core.window = embedderid;
/* this little trick seems to finish initializing the widget */
#if XlibSpecificationRelease >= 6
XtRegisterDrawable(xtclient->xtdisplay,
embedderid,
top_widget);
#else
_XtRegisterWindow( embedderid,
top_widget);
#endif
XtRealizeWidget(child_widget);
/* listen to all Xt events */
XSelectInput(xtclient->xtdisplay,
XtWindow(top_widget),
0x0FFFFF);
xt_client_set_info (child_widget, 0);
XtManageChild(child_widget);
xtclient->child_widget = child_widget;
/* set the event handler */
XtAddEventHandler(child_widget,
0x0FFFFF & ~ResizeRedirectMask,
TRUE,
(XtEventHandler)xt_client_event_handler, xtclient);
XtAddEventHandler(child_widget,
SubstructureNotifyMask | ButtonReleaseMask,
TRUE,
(XtEventHandler)xt_client_focus_listener,
xtclient);
XSync(xtclient->xtdisplay, FALSE);
}
static void
xt_client_unrealize ( XtClient* xtclient )
{
#if XlibSpecificationRelease >= 6
XtUnregisterDrawable(xtclient->xtdisplay,
xtclient->top_widget->core.window);
#else
_XtUnregisterWindow(xtclient->top_widget->core.window,
xtclient->top_widget);
#endif
/* flush the queue before we returning origin top_widget->core.window
or we can get X error since the window is gone */
XSync(xtclient->xtdisplay, False);
xtclient->top_widget->core.window = xtclient->oldwindow;
XtUnrealizeWidget(xtclient->top_widget);
}
static void
xt_client_destroy (XtClient* xtclient)
{
if(xtclient->top_widget) {
XtRemoveEventHandler(xtclient->child_widget, 0x0FFFFF, TRUE,
(XtEventHandler)xt_client_event_handler, xtclient);
XtDestroyWidget(xtclient->top_widget);
xtclient->top_widget = NULL;
}
}
static void
xt_client_set_info (Widget xtplug, unsigned long flags)
{
unsigned long buffer[2];
Atom infoAtom = XInternAtom(XtDisplay(xtplug), "_XEMBED_INFO", False);
buffer[1] = 0; /* Protocol version */
buffer[1] = flags;
XChangeProperty (XtDisplay(xtplug), XtWindow(xtplug),
infoAtom, infoAtom, 32,
PropModeReplace,
(unsigned char *)buffer, 2);
}
static void
xt_client_handle_xembed_message(Widget w, XtPointer client_data, XEvent *event)
{
XtClient *xtplug = (XtClient*)client_data;
switch (event->xclient.data.l[1])
{
case XEMBED_EMBEDDED_NOTIFY:
break;
case XEMBED_WINDOW_ACTIVATE:
#ifdef DEBUG_XTBIN
printf("Xt client get XEMBED_WINDOW_ACTIVATE\n");
#endif
break;
case XEMBED_WINDOW_DEACTIVATE:
#ifdef DEBUG_XTBIN
printf("Xt client get XEMBED_WINDOW_DEACTIVATE\n");
#endif
break;
case XEMBED_MODALITY_ON:
#ifdef DEBUG_XTBIN
printf("Xt client get XEMBED_MODALITY_ON\n");
#endif
break;
case XEMBED_MODALITY_OFF:
#ifdef DEBUG_XTBIN
printf("Xt client get XEMBED_MODALITY_OFF\n");
#endif
break;
case XEMBED_FOCUS_IN:
case XEMBED_FOCUS_OUT:
{
XEvent xevent;
memset(&xevent, 0, sizeof(xevent));
if(event->xclient.data.l[1] == XEMBED_FOCUS_IN) {
#ifdef DEBUG_XTBIN
printf("XTEMBED got focus in\n");
#endif
xevent.xfocus.type = FocusIn;
}
else {
#ifdef DEBUG_XTBIN
printf("XTEMBED got focus out\n");
#endif
xevent.xfocus.type = FocusOut;
}
xevent.xfocus.window = XtWindow(xtplug->child_widget);
xevent.xfocus.display = XtDisplay(xtplug->child_widget);
XSendEvent(XtDisplay(xtplug->child_widget),
xevent.xfocus.window,
False, NoEventMask,
&xevent );
XSync( XtDisplay(xtplug->child_widget), False);
}
break;
default:
break;
} /* End of XEmbed Message */
}
static void
xt_client_event_handler( Widget w, XtPointer client_data, XEvent *event)
{
XtClient *xtplug = (XtClient*)client_data;
switch(event->type)
{
case ClientMessage:
/* Handle xembed message */
if (event->xclient.message_type==
XInternAtom (XtDisplay(xtplug->child_widget),
"_XEMBED", False)) {
xt_client_handle_xembed_message(w, client_data, event);
}
break;
case ReparentNotify:
break;
case MappingNotify:
xt_client_set_info (w, XEMBED_MAPPED);
break;
case UnmapNotify:
xt_client_set_info (w, 0);
break;
case FocusIn:
send_xembed_message ( xtplug,
XEMBED_REQUEST_FOCUS, 0, 0, 0, 0);
break;
case FocusOut:
break;
case KeyPress:
#ifdef DEBUG_XTBIN
printf("Key Press Got!\n");
#endif
break;
default:
break;
} /* End of switch(event->type) */
}
static void
send_xembed_message (XtClient *xtclient,
long message,
long detail,
long data1,
long data2,
long time)
{
XEvent xevent;
Window w=XtWindow(xtclient->top_widget);
Display* dpy=xtclient->xtdisplay;
int errorcode;
memset(&xevent,0,sizeof(xevent));
xevent.xclient.window = w;
xevent.xclient.type = ClientMessage;
xevent.xclient.message_type = XInternAtom(dpy,"_XEMBED",False);
xevent.xclient.format = 32;
xevent.xclient.data.l[0] = time;
xevent.xclient.data.l[1] = message;
xevent.xclient.data.l[2] = detail;
xevent.xclient.data.l[3] = data1;
xevent.xclient.data.l[4] = data2;
trap_errors ();
XSendEvent (dpy, w, False, NoEventMask, &xevent);
XSync (dpy,False);
if((errorcode = untrap_error())) {
#ifdef DEBUG_XTBIN
printf("send_xembed_message error(%d)!!!\n",errorcode);
#endif
}
}
static int
error_handler(Display *display, XErrorEvent *error)
{
trapped_error_code = error->error_code;
return 0;
}
static void
trap_errors(void)
{
trapped_error_code =0;
old_error_handler = XSetErrorHandler(error_handler);
}
static int
untrap_error(void)
{
XSetErrorHandler(old_error_handler);
if(trapped_error_code) {
#ifdef DEBUG_XTBIN
printf("Get X Window Error = %d\n", trapped_error_code);
#endif
}
return trapped_error_code;
}
static void
xt_client_focus_listener( Widget w, XtPointer user_data, XEvent *event)
{
Display *dpy = XtDisplay(w);
XtClient *xtclient = user_data;
Window win = XtWindow(w);
switch(event->type)
{
case CreateNotify:
if(event->xcreatewindow.parent == win) {
Widget child=XtWindowToWidget( dpy, event->xcreatewindow.window);
if (child)
xt_add_focus_listener_tree(child, user_data);
}
break;
case DestroyNotify:
xt_remove_focus_listener( w, user_data);
break;
case ReparentNotify:
if(event->xreparent.parent == win) {
/* I am the new parent */
Widget child=XtWindowToWidget(dpy, event->xreparent.window);
if (child)
xt_add_focus_listener_tree( child, user_data);
}
else if(event->xreparent.window == win) {
/* I am the new child */
}
else {
/* I am the old parent */
}
break;
case ButtonRelease:
#if 0
XSetInputFocus(dpy, XtWindow(xtclient->child_widget), RevertToParent, event->xbutton.time);
#endif
send_xembed_message ( xtclient,
XEMBED_REQUEST_FOCUS, 0, 0, 0, 0);
break;
default:
break;
} /* End of switch(event->type) */
}
static void
xt_add_focus_listener( Widget w, XtPointer user_data)
{
XWindowAttributes attr;
long eventmask;
XtClient *xtclient = user_data;
int errorcode;
trap_errors ();
XGetWindowAttributes(XtDisplay(w), XtWindow(w), &attr);
eventmask = attr.your_event_mask | SubstructureNotifyMask | ButtonReleaseMask;
XSelectInput(XtDisplay(w),
XtWindow(w),
eventmask);
XtAddEventHandler(w,
SubstructureNotifyMask | ButtonReleaseMask,
TRUE,
(XtEventHandler)xt_client_focus_listener,
xtclient);
untrap_error();
}
static void
xt_remove_focus_listener(Widget w, XtPointer user_data)
{
int errorcode;
trap_errors ();
XtRemoveEventHandler(w, SubstructureNotifyMask | ButtonReleaseMask, TRUE,
(XtEventHandler)xt_client_focus_listener, user_data);
untrap_error();
}
static void
xt_add_focus_listener_tree ( Widget treeroot, XtPointer user_data)
{
Window win = XtWindow(treeroot);
Window *children;
Window root, parent;
Display *dpy = XtDisplay(treeroot);
unsigned int i, nchildren;
/* ensure we don't add more than once */
xt_remove_focus_listener( treeroot, user_data);
xt_add_focus_listener( treeroot, user_data);
trap_errors();
if(!XQueryTree(dpy, win, &root, &parent, &children, &nchildren)) {
untrap_error();
return;
}
if(untrap_error())
return;
for(i=0; i<nchildren; ++i) {
Widget child = XtWindowToWidget(dpy, children[i]);
if (child)
xt_add_focus_listener_tree( child, user_data);
}
XFree((void*)children);
return;
}
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