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gtk2/gtk/gtkmain.c
Owen Taylor d5d01a5af9 It's all in the changelog. Well, almost all. 
-owt
1997-12-18 02:17:14 +00:00

1198 lines
27 KiB
C
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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 Library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include "gtkbutton.h"
#include "gtkhscrollbar.h"
#include "gtkhseparator.h"
#include "gtkmain.h"
#include "gtkpreview.h"
#include "gtkrc.h"
#include "gtkselection.h"
#include "gtksignal.h"
#include "gtktable.h"
#include "gtktext.h"
#include "gtkvbox.h"
#include "gtkvscrollbar.h"
#include "gtkwidget.h"
#include "gtkwindow.h"
/* Private type definitions
*/
typedef struct _GtkInitFunction GtkInitFunction;
typedef struct _GtkTimeoutFunction GtkTimeoutFunction;
typedef struct _GtkIdleFunction GtkIdleFunction;
typedef struct _GtkInputFunction GtkInputFunction;
struct _GtkInitFunction
{
GtkFunction function;
gpointer data;
};
struct _GtkTimeoutFunction
{
gint tag;
guint32 start;
guint32 interval;
guint32 originterval;
gint interp;
GtkFunction function;
gpointer data;
GtkDestroyNotify destroy;
};
struct _GtkIdleFunction
{
gint tag;
gint interp;
GtkFunction function;
gpointer data;
GtkDestroyNotify destroy;
};
struct _GtkInputFunction
{
GtkCallbackMarshal callback;
gpointer data;
GtkDestroyNotify destroy;
};
static void gtk_exit_func (void);
static void gtk_timeout_insert (GtkTimeoutFunction *timeoutf);
static void gtk_handle_current_timeouts (guint32 the_time);
static void gtk_handle_current_idles (void);
static void gtk_handle_timeouts (void);
static void gtk_handle_idle (void);
static void gtk_handle_timer (void);
static void gtk_propagate_event (GtkWidget *widget,
GdkEvent *event);
static void gtk_error (gchar *str);
static void gtk_warning (gchar *str);
static void gtk_message (gchar *str);
static void gtk_print (gchar *str);
static gint done;
static guint main_level = 0;
static gint initialized = FALSE;
static GdkEvent *next_event = NULL;
static GdkEvent *current_event = NULL;
static GList *current_events = NULL;
static GList *grabs = NULL; /* A list of grabs. The grabbing widget
* is the first one on the list.
*/
static GList *init_functions = NULL; /* A list of init functions.
*/
static GList *timeout_functions = NULL; /* A list of timeout functions sorted by
* when the length of the time interval
* remaining. Therefore, the first timeout
* function to expire is at the head of
* the list and the last to expire is at
* the tail of the list.
*/
static GList *idle_functions = NULL; /* A list of idle functions.
*/
static GList *current_idles = NULL;
static GList *current_timeouts = NULL;
static GMemChunk *timeout_mem_chunk = NULL;
static GMemChunk *idle_mem_chunk = NULL;
static GdkVisual *gtk_visual; /* The visual to be used in creating new
* widgets.
*/
static GdkColormap *gtk_colormap; /* The colormap to be used in creating new
* widgets.
*/
void
gtk_init (int *argc,
char ***argv)
{
if (0)
{
g_set_error_handler (gtk_error);
g_set_warning_handler (gtk_warning);
g_set_message_handler (gtk_message);
g_set_print_handler (gtk_print);
}
/* Initialize "gdk". We simply pass along the 'argc' and 'argv'
* parameters as they contain information that
*/
gdk_init (argc, argv);
/* Initialize the default visual and colormap to be
* used in creating widgets. (We want to use the system
* defaults so as to be nice to the colormap).
*/
gtk_visual = gdk_visual_get_system ();
gtk_colormap = gdk_colormap_get_system ();
gtk_rc_init ();
gtk_type_init ();
/* Register an exit function to make sure we are able to cleanup.
*/
if (ATEXIT (gtk_exit_func))
g_warning ("unable to register exit function");
/* Set the 'initialized' flag.
*/
initialized = TRUE;
}
void
gtk_exit (int errorcode)
{
/* Only if "gtk" has been initialized should we de-initialize.
*/
/* de-initialisation is done by the gtk_exit_funct(),
* no need to do this here (Alex J.)
*/
gdk_exit(errorcode);
}
gchar*
gtk_set_locale ()
{
return gdk_set_locale ();
}
void
gtk_main ()
{
GList *tmp_list;
GList *functions;
GtkInitFunction *init;
int old_done;
main_level++;
tmp_list = functions = init_functions;
init_functions = NULL;
while (tmp_list)
{
init = tmp_list->data;
tmp_list = tmp_list->next;
(* init->function) (init->data);
g_free (init);
}
g_list_free (functions);
old_done = done;
while (!gtk_main_iteration ())
;
done = old_done;
main_level--;
}
guint
gtk_main_level (void)
{
return main_level;
}
void
gtk_main_quit ()
{
done = TRUE;
}
gint
gtk_main_iteration ()
{
GtkWidget *event_widget;
GtkWidget *grab_widget;
GdkEvent *event = NULL;
GList *tmp_list;
done = FALSE;
/* If this is a recursive call, and there are pending timeouts or
* idles, finish them, then return immediately to avoid blocking
* in gdk_event_get()
*/
if (current_timeouts)
{
gtk_handle_current_timeouts( gdk_time_get());
return done;
}
if (current_idles)
{
gtk_handle_current_idles();
return done;
}
/* If there is a valid event in 'next_event' then move it to 'event'
*/
if (next_event)
{
event = next_event;
next_event = NULL;
}
/* If we don't have an event then get one.
*/
if (!event)
{
/* Handle setting of the "gdk" timer. If there are no
* timeout functions, then the timer is turned off.
* If there are timeout functions, then the timer is
* set to the shortest timeout interval (which is
* the first timeout function).
*/
gtk_handle_timer ();
event = gdk_event_get ();
}
/* "gdk_event_get" can return FALSE if the timer goes off
* and no events are pending. Therefore, we should make
* sure that we got an event before continuing.
*/
if (event)
{
/* If there are any events pending then get the next one.
*/
if (gdk_events_pending () > 0)
next_event = gdk_event_get ();
/* Try to compress enter/leave notify events. These event
* pairs occur when the mouse is dragged quickly across
* a window with many buttons (or through a menu). Instead
* of highlighting and de-highlighting each widget that
* is crossed it is better to simply de-highlight the widget
* which contained the mouse initially and highlight the
* widget which ends up containing the mouse.
*/
if (next_event)
if (((event->type == GDK_ENTER_NOTIFY) ||
(event->type == GDK_LEAVE_NOTIFY)) &&
((next_event->type == GDK_ENTER_NOTIFY) ||
(next_event->type == GDK_LEAVE_NOTIFY)) &&
(next_event->type != event->type) &&
(next_event->any.window == event->any.window))
{
tmp_list = current_events;
current_events = g_list_remove_link (current_events, tmp_list);
g_list_free_1 (tmp_list);
gdk_event_free (event);
return done;
}
/* Push the event onto a stack of current events for
* gdk_current_event_get */
current_events = g_list_prepend (current_events, event);
/* Find the widget which got the event. We store the widget
* in the user_data field of GdkWindow's.
*/
event_widget = gtk_get_event_widget (event);
/* If there is a grab in effect...
*/
if (grabs)
{
grab_widget = grabs->data;
/* If the grab widget is an ancestor of the event widget
* then we send the event to the original event widget.
* This is the key to implementing modality.
*/
if (gtk_widget_is_ancestor (event_widget, grab_widget))
grab_widget = event_widget;
}
else
{
grab_widget = event_widget;
}
/* Not all events get sent to the grabbing widget.
* The delete, destroy, expose, focus change and resize
* events still get sent to the event widget because
* 1) these events have no meaning for the grabbing widget
* and 2) redirecting these events to the grabbing widget
* could cause the display to be messed up.
*/
switch (event->type)
{
case GDK_NOTHING:
break;
case GDK_DELETE:
gtk_object_ref (GTK_OBJECT (event_widget));
if (gtk_widget_event (event_widget, event))
gtk_widget_destroy (event_widget);
gtk_object_unref (GTK_OBJECT (event_widget));
break;
case GDK_DESTROY:
gtk_object_ref (GTK_OBJECT (event_widget));
gtk_widget_event (event_widget, event);
gtk_widget_destroy (event_widget);
gtk_object_unref (GTK_OBJECT (event_widget));
break;
case GDK_PROPERTY_NOTIFY:
/* To handle selection INCR transactions, we select
* PropertyNotify events on the requestor window and create
* a corresponding (fake) GdkWindow so that events get
* here. There won't be a widget though, so we have to handle
* them specially
*/
if (event_widget == NULL)
{
gtk_selection_incr_event (event->any.window,
&event->property);
break;
}
/* otherwise fall through */
case GDK_EXPOSE:
case GDK_FOCUS_CHANGE:
case GDK_CONFIGURE:
case GDK_MAP:
case GDK_UNMAP:
case GDK_SELECTION_CLEAR:
case GDK_SELECTION_REQUEST:
case GDK_SELECTION_NOTIFY:
case GDK_CLIENT_EVENT:
case GDK_DRAG_BEGIN:
case GDK_DRAG_REQUEST:
case GDK_DROP_ENTER:
case GDK_DROP_LEAVE:
case GDK_DROP_DATA_AVAIL:
gtk_widget_event (event_widget, event);
break;
case GDK_MOTION_NOTIFY:
case GDK_BUTTON_PRESS:
case GDK_2BUTTON_PRESS:
case GDK_3BUTTON_PRESS:
case GDK_BUTTON_RELEASE:
case GDK_KEY_PRESS:
case GDK_KEY_RELEASE:
case GDK_PROXIMITY_IN:
case GDK_PROXIMITY_OUT:
case GDK_OTHER_EVENT:
gtk_propagate_event (grab_widget, event);
break;
case GDK_ENTER_NOTIFY:
case GDK_LEAVE_NOTIFY:
if (grab_widget && GTK_WIDGET_IS_SENSITIVE (grab_widget))
gtk_widget_event (grab_widget, event);
break;
}
tmp_list = current_events;
current_events = g_list_remove_link (current_events, tmp_list);
g_list_free_1 (tmp_list);
gdk_event_free (event);
current_event = NULL;
}
else
{
if (gdk_events_pending() == 0)
gtk_handle_idle ();
}
/* Handle a timeout functions that may have expired.
*/
gtk_handle_timeouts ();
return done;
}
gint
gtk_true (void)
{
return TRUE;
}
gint
gtk_false (void)
{
return FALSE;
}
void
gtk_grab_add (GtkWidget *widget)
{
/* Place the grab on the front of the list of grabs.
*/
grabs = g_list_prepend (grabs, widget);
}
void
gtk_grab_remove (GtkWidget *widget)
{
/* Remove the grab from the list of grabs.
* Note: the grab being removed may be in
* the middle of the list.
*/
grabs = g_list_remove (grabs, widget);
}
void
gtk_init_add (GtkFunction function,
gpointer data)
{
GtkInitFunction *init;
init = g_new (GtkInitFunction, 1);
init->function = function;
init->data = data;
init_functions = g_list_prepend (init_functions, init);
}
static gint
gtk_timeout_add_internal (guint32 interval,
gint interp,
GtkFunction function,
gpointer data,
GtkDestroyNotify destroy)
{
static gint timeout_tag = 1;
GtkTimeoutFunction *timeoutf;
/* Create a new timeout function structure.
* The start time is the current time.
*/
if (!timeout_mem_chunk)
timeout_mem_chunk = g_mem_chunk_new ("timeout mem chunk", sizeof (GtkTimeoutFunction),
1024, G_ALLOC_AND_FREE);
timeoutf = g_chunk_new (GtkTimeoutFunction, timeout_mem_chunk);
timeoutf->tag = timeout_tag++;
timeoutf->start = gdk_time_get ();
timeoutf->interval = interval;
timeoutf->originterval = interval;
timeoutf->interp = interp;
timeoutf->function = function;
timeoutf->data = data;
timeoutf->destroy = destroy;
gtk_timeout_insert (timeoutf);
return timeoutf->tag;
}
static void
gtk_timeout_destroy (GtkTimeoutFunction *timeoutf)
{
if (timeoutf->destroy)
(timeoutf->destroy) (timeoutf->data);
g_mem_chunk_free (timeout_mem_chunk, timeoutf);
}
gint
gtk_timeout_add (guint32 interval,
GtkFunction function,
gpointer data)
{
return gtk_timeout_add_internal (interval, FALSE, function, data, NULL);
}
gint
gtk_timeout_add_interp (guint32 interval,
GtkCallbackMarshal function,
gpointer data,
GtkDestroyNotify destroy)
{
return gtk_timeout_add_internal (interval, TRUE,
(GtkFunction) function,
data, destroy);
}
void
gtk_timeout_remove (gint tag)
{
GtkTimeoutFunction *timeoutf;
GList *tmp_list;
/* Remove a timeout function.
* (Which, basically, involves searching the
* list for the tag).
*/
tmp_list = timeout_functions;
while (tmp_list)
{
timeoutf = tmp_list->data;
if (timeoutf->tag == tag)
{
timeout_functions = g_list_remove_link (timeout_functions, tmp_list);
g_list_free (tmp_list);
gtk_timeout_destroy (timeoutf);
return;
}
tmp_list = tmp_list->next;
}
tmp_list = current_timeouts;
while (tmp_list)
{
timeoutf = tmp_list->data;
if (timeoutf->tag == tag)
{
current_timeouts = g_list_remove_link (current_timeouts, tmp_list);
g_list_free (tmp_list);
gtk_timeout_destroy (timeoutf);
return;
}
tmp_list = tmp_list->next;
}
}
static gint
gtk_idle_add_internal (gint interp,
GtkFunction function,
gpointer data,
GtkDestroyNotify destroy)
{
static gint idle_tag = 1;
GtkIdleFunction *idlef;
if (!idle_mem_chunk)
idle_mem_chunk = g_mem_chunk_new ("idle mem chunk", sizeof (GtkIdleFunction),
1024, G_ALLOC_AND_FREE);
idlef = g_chunk_new (GtkIdleFunction, idle_mem_chunk);
idlef->tag = idle_tag++;
idlef->interp = interp;
idlef->function = function;
idlef->data = data;
idlef->destroy = destroy;
idle_functions = g_list_append (idle_functions, idlef);
return idlef->tag;
}
static void
gtk_idle_destroy (GtkIdleFunction *idlef)
{
if (idlef->destroy)
idlef->destroy (idlef->data);
g_mem_chunk_free (idle_mem_chunk, idlef);
}
gint
gtk_idle_add (GtkFunction function,
gpointer data)
{
return gtk_idle_add_internal (FALSE, function, data, NULL);
}
gint
gtk_idle_add_interp (GtkCallbackMarshal function,
gpointer data,
GtkDestroyNotify destroy)
{
return gtk_idle_add_internal (TRUE, (GtkFunction)function, data, destroy);
}
void
gtk_idle_remove (gint tag)
{
GtkIdleFunction *idlef;
GList *tmp_list;
tmp_list = idle_functions;
while (tmp_list)
{
idlef = tmp_list->data;
if (idlef->tag == tag)
{
idle_functions = g_list_remove_link (idle_functions, tmp_list);
g_list_free (tmp_list);
gtk_idle_destroy (idlef);
return;
}
tmp_list = tmp_list->next;
}
tmp_list = current_idles;
while (tmp_list)
{
idlef = tmp_list->data;
if (idlef->tag == tag)
{
current_idles = g_list_remove_link (current_idles, tmp_list);
g_list_free (tmp_list);
gtk_idle_destroy (idlef);
return;
}
tmp_list = tmp_list->next;
}
}
void
gtk_idle_remove_by_data (gpointer data)
{
GtkIdleFunction *idlef;
GList *tmp_list;
tmp_list = idle_functions;
while (tmp_list)
{
idlef = tmp_list->data;
if (idlef->data == data)
{
idle_functions = g_list_remove_link (idle_functions, tmp_list);
g_list_free (tmp_list);
g_mem_chunk_free (idle_mem_chunk, idlef);
return;
}
tmp_list = tmp_list->next;
}
tmp_list = current_idles;
while (tmp_list)
{
idlef = tmp_list->data;
if (idlef->data == data)
{
current_idles = g_list_remove_link (current_idles, tmp_list);
g_list_free (tmp_list);
g_mem_chunk_free (idle_mem_chunk, idlef);
return;
}
tmp_list = tmp_list->next;
}
}
static void
gtk_invoke_input_function (GtkInputFunction *input,
gint source,
GdkInputCondition condition)
{
GtkArg args[3];
args[0].type = GTK_TYPE_INT;
args[0].name = NULL;
GTK_VALUE_INT(args[0]) = source;
args[1].type = GTK_TYPE_GDK_INPUT_CONDITION;
args[1].name = NULL;
GTK_VALUE_FLAGS(args[1]) = condition;
args[2].type = GTK_TYPE_NONE;
args[2].name = NULL;
input->callback (NULL, input->data, 2, args);
}
static void
gtk_destroy_input_function (GtkInputFunction *input)
{
if (input->destroy)
(input->destroy) (input->data);
g_free (input);
}
gint
gtk_input_add_interp (gint source,
GdkInputCondition condition,
GtkCallbackMarshal callback,
gpointer data,
GtkDestroyNotify destroy)
{
GtkInputFunction *input = g_new (GtkInputFunction, 1);
input->callback = callback;
input->data = data;
input->destroy = destroy;
return gdk_input_add_interp (source,
condition,
(GdkInputFunction) gtk_invoke_input_function,
input,
(GdkDestroyNotify) gtk_destroy_input_function);
}
void
gtk_input_remove (gint tag)
{
gdk_input_remove (tag);
}
GdkEvent *
gtk_get_current_event ()
{
if (current_events)
return gdk_event_copy ((GdkEvent *)current_events->data);
else
return NULL;
}
GtkWidget*
gtk_get_event_widget (GdkEvent *event)
{
GtkWidget *widget;
gdk_window_get_user_data (event->any.window, (void**) &widget);
return widget;
}
static void
gtk_exit_func ()
{
if (initialized)
{
initialized = FALSE;
gtk_preview_uninit ();
}
}
static void
gtk_timeout_insert (GtkTimeoutFunction *timeoutf)
{
GtkTimeoutFunction *temp;
GList *temp_list;
GList *new_list;
g_assert (timeoutf != NULL);
/* Insert the timeout function appropriately.
* Appropriately meaning sort it into the list
* of timeout functions.
*/
temp_list = timeout_functions;
while (temp_list)
{
temp = temp_list->data;
if (timeoutf->interval < temp->interval)
{
new_list = g_list_alloc ();
new_list->data = timeoutf;
new_list->next = temp_list;
new_list->prev = temp_list->prev;
if (temp_list->prev)
temp_list->prev->next = new_list;
temp_list->prev = new_list;
if (temp_list == timeout_functions)
timeout_functions = new_list;
return;
}
temp_list = temp_list->next;
}
timeout_functions = g_list_append (timeout_functions, timeoutf);
}
static gint
gtk_invoke_timeout_function (GtkTimeoutFunction *timeoutf)
{
if (!timeoutf->interp)
return timeoutf->function (timeoutf->data);
else
{
GtkArg args[1];
gint ret_val = FALSE;
args[0].name = NULL;
args[0].type = GTK_TYPE_BOOL;
args[0].d.pointer_data = &ret_val;
((GtkCallbackMarshal)timeoutf->function) (NULL,
timeoutf->data,
0, args);
return ret_val;
}
}
static void
gtk_handle_current_timeouts (guint32 the_time)
{
GList *tmp_list;
GtkTimeoutFunction *timeoutf;
while (current_timeouts)
{
tmp_list = current_timeouts;
timeoutf = tmp_list->data;
current_timeouts = g_list_remove_link (current_timeouts, tmp_list);
g_list_free (tmp_list);
if (gtk_invoke_timeout_function (timeoutf) == FALSE)
{
gtk_timeout_destroy (timeoutf);
}
else
{
timeoutf->interval = timeoutf->originterval;
timeoutf->start = the_time;
gtk_timeout_insert (timeoutf);
}
}
}
static void
gtk_handle_timeouts ()
{
guint32 the_time;
GList *tmp_list;
GList *tmp_list2;
GtkTimeoutFunction *timeoutf;
/* Caller must already have called gtk_handle_current_timeouts if
* necessary */
g_assert (current_timeouts == NULL);
if (timeout_functions)
{
the_time = gdk_time_get ();
tmp_list = timeout_functions;
while (tmp_list)
{
timeoutf = tmp_list->data;
if (timeoutf->interval <= (the_time - timeoutf->start))
{
tmp_list2 = tmp_list;
tmp_list = tmp_list->next;
timeout_functions = g_list_remove_link (timeout_functions, tmp_list2);
current_timeouts = g_list_concat (current_timeouts, tmp_list2);
}
else
{
timeoutf->interval -= (the_time - timeoutf->start);
timeoutf->start = the_time;
tmp_list = tmp_list->next;
}
}
if (current_timeouts)
gtk_handle_current_timeouts(the_time);
}
}
static gint
gtk_idle_invoke_function (GtkIdleFunction *idlef)
{
if (!idlef->interp)
return idlef->function (idlef->data);
else
{
GtkArg args[1];
gint ret_val = FALSE;
args[0].name = NULL;
args[0].type = GTK_TYPE_BOOL;
args[0].d.pointer_data = &ret_val;
((GtkCallbackMarshal)idlef->function) (NULL,
idlef->data,
0, args);
return ret_val;
}
}
static void
gtk_handle_current_idles ()
{
GList *tmp_list;
GtkIdleFunction *idlef;
while (current_idles)
{
tmp_list = current_idles;
idlef = tmp_list->data;
current_idles = g_list_remove_link (current_idles, tmp_list);
if (gtk_idle_invoke_function (idlef) == FALSE)
{
g_list_free (tmp_list);
gtk_idle_destroy (idlef);
}
else
{
idle_functions = g_list_concat (idle_functions, tmp_list);
}
}
}
static void
gtk_handle_idle ()
{
/* Caller must already have called gtk_handle_current_idles if
* necessary
*/
g_assert (current_idles == NULL);
if (idle_functions)
{
current_idles = idle_functions;
idle_functions = NULL;
gtk_handle_current_idles();
}
}
static void
gtk_handle_timer ()
{
GtkTimeoutFunction *timeoutf;
if (idle_functions)
{
gdk_timer_set (0);
gdk_timer_enable ();
}
else if (timeout_functions)
{
timeoutf = timeout_functions->data;
gdk_timer_set (timeoutf->interval);
gdk_timer_enable ();
}
else
{
gdk_timer_set (0);
gdk_timer_disable ();
}
}
static void
gtk_propagate_event (GtkWidget *widget,
GdkEvent *event)
{
GtkWidget *parent;
gint handled_event;
gint parent_old_value;
gint old_value;
g_return_if_fail (widget != NULL);
g_return_if_fail (event != NULL);
handled_event = FALSE;
if ((event->type == GDK_KEY_PRESS) ||
(event->type == GDK_KEY_RELEASE))
{
/* Only send key events to window widgets.
* The window widget will in turn pass the
* key event on to the currently focused widget
* for that window.
*/
parent = gtk_widget_get_ancestor (widget, gtk_window_get_type ());
if (parent && GTK_WIDGET_IS_SENSITIVE (parent))
{
parent_old_value = GTK_OBJECT_IN_CALL (parent);
GTK_OBJECT_SET_FLAGS (parent, GTK_IN_CALL);
handled_event = gtk_widget_event (parent, event);
if (!parent_old_value)
GTK_OBJECT_UNSET_FLAGS (parent, GTK_IN_CALL);
if (GTK_OBJECT_NEED_DESTROY (parent) && !GTK_OBJECT_IN_CALL (parent))
{
gtk_object_destroy (GTK_OBJECT (parent));
return;
}
}
}
if (!handled_event)
{
old_value = GTK_OBJECT_IN_CALL (widget);
GTK_OBJECT_SET_FLAGS (widget, GTK_IN_CALL);
/* Other events get propagated up the widget tree
* so that parents can see the button and motion
* events of the children.
*/
parent = widget;
while (parent)
{
parent_old_value = GTK_OBJECT_IN_CALL (parent);
GTK_OBJECT_SET_FLAGS (parent, GTK_IN_CALL);
handled_event = (!GTK_WIDGET_IS_SENSITIVE (parent) ||
gtk_widget_event (parent, event));
if (!parent_old_value)
GTK_OBJECT_UNSET_FLAGS (parent, GTK_IN_CALL);
if (handled_event)
break;
if (GTK_OBJECT_NEED_DESTROY (parent) && !GTK_OBJECT_IN_CALL (parent))
{
gtk_object_destroy (GTK_OBJECT (parent));
break;
}
parent = parent->parent;
}
if (!old_value)
GTK_OBJECT_UNSET_FLAGS (widget, GTK_IN_CALL);
if (GTK_OBJECT_NEED_DESTROY (widget) && !GTK_OBJECT_IN_CALL (widget))
gtk_object_destroy (GTK_OBJECT (widget));
}
}
static void
gtk_error (gchar *str)
{
gtk_print (str);
}
static void
gtk_warning (gchar *str)
{
gtk_print (str);
}
static void
gtk_message (gchar *str)
{
gtk_print (str);
}
static void
gtk_print (gchar *str)
{
static GtkWidget *window = NULL;
static GtkWidget *text;
static int level = 0;
GtkWidget *box1;
GtkWidget *box2;
GtkWidget *table;
GtkWidget *hscrollbar;
GtkWidget *vscrollbar;
GtkWidget *separator;
GtkWidget *button;
if (level > 0)
{
fputs (str, stdout);
fflush (stdout);
return;
}
if (!window)
{
window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
/*
* gtk_signal_connect (GTK_OBJECT (window), "destroy",
* (GtkSignalFunc) gtk_widget_destroyed,
* &window);
*/
gtk_window_set_title (GTK_WINDOW (window), "Messages");
box1 = gtk_vbox_new (FALSE, 0);
gtk_container_add (GTK_CONTAINER (window), box1);
gtk_widget_show (box1);
box2 = gtk_vbox_new (FALSE, 10);
gtk_container_border_width (GTK_CONTAINER (box2), 10);
gtk_box_pack_start (GTK_BOX (box1), box2, TRUE, TRUE, 0);
gtk_widget_show (box2);
table = gtk_table_new (2, 2, FALSE);
gtk_table_set_row_spacing (GTK_TABLE (table), 0, 2);
gtk_table_set_col_spacing (GTK_TABLE (table), 0, 2);
gtk_box_pack_start (GTK_BOX (box2), table, TRUE, TRUE, 0);
gtk_widget_show (table);
text = gtk_text_new (NULL, NULL);
gtk_text_set_editable (GTK_TEXT (text), FALSE);
gtk_table_attach_defaults (GTK_TABLE (table), text, 0, 1, 0, 1);
gtk_widget_show (text);
gtk_widget_realize (text);
hscrollbar = gtk_hscrollbar_new (GTK_TEXT (text)->hadj);
gtk_table_attach (GTK_TABLE (table), hscrollbar, 0, 1, 1, 2,
GTK_EXPAND | GTK_FILL, GTK_FILL, 0, 0);
gtk_widget_show (hscrollbar);
vscrollbar = gtk_vscrollbar_new (GTK_TEXT (text)->vadj);
gtk_table_attach (GTK_TABLE (table), vscrollbar, 1, 2, 0, 1,
GTK_FILL, GTK_EXPAND | GTK_FILL, 0, 0);
gtk_widget_show (vscrollbar);
separator = gtk_hseparator_new ();
gtk_box_pack_start (GTK_BOX (box1), separator, FALSE, TRUE, 0);
gtk_widget_show (separator);
box2 = gtk_vbox_new (FALSE, 10);
gtk_container_border_width (GTK_CONTAINER (box2), 10);
gtk_box_pack_start (GTK_BOX (box1), box2, FALSE, TRUE, 0);
gtk_widget_show (box2);
button = gtk_button_new_with_label ("close");
gtk_signal_connect_object (GTK_OBJECT (button), "clicked",
(GtkSignalFunc) gtk_widget_hide,
GTK_OBJECT (window));
gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);
GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);
gtk_widget_grab_default (button);
gtk_widget_show (button);
}
level += 1;
gtk_text_insert (GTK_TEXT (text), NULL, NULL, NULL, str, -1);
level -= 1;
if (!GTK_WIDGET_VISIBLE (window))
gtk_widget_show (window);
}
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