Hello!
I have an addition to my email from last tuesday, concerning problems
with directfb & gtk_dialog_run (see below). The problem is obviously
somehow related to g_threads. I have attached a very simple gtk app
to this email, where the described phenomenon occurs. Actually
I don't use g_threads in this example, I just initialize the g_thread
system... which is enough for the problem to occur.
What is definitely not clear to me, can be found in line 38 and below
in my code. To make gtk_dialog_run work correctly, I need to do the
following:
#ifdef _DIRECTFB
gdk_threads_enter();
gtk_dialog_run(GTK_DIALOG(dialog2));
gdk_threads_leave();
#else
gtk_dialog_run(GTK_DIALOG(dialog2));
#endif
i.e. when linked to the x11-gtk-libraries i must not use gdk_threads_enter()
and gdk_threads_leave() before and after the call to gtk_dialog_run (which
is correct I guess?), in case of directfb-gtk I _have_ to! It's really
mutually exclusive...
I'm wondering if this behavior is intended or not...?
Best regards
Christian
Am Dienstag, 27. Juni 2006 13:54 schrieb Christian Schaubschlaeger:
> Hi all!
>
> I observe a severe problem in my gtk+ app, which might be related to
> directfb. I'm not sure, maybe the problem lies in my domain, but the
> reason, why I think it might be dfb related is, that on gtk+X11 everything
> works perfectly fine...
>
> My environment is: gentoo linux, 2.6.16.16, gcc-3.4.6.
> DirectFB version is 0.9.25.1
> Gtk version is 2.9.2
> Glib version is 2.11.4
> (Gtk libraries for X11 are V2.8.12)
>
> And here's the problem:
>
> I've implemented a simple messagebox dialog as shown below. I
> have a "wrapper" function "dialog_messagebox", which creates
> the dialog and waits for it's completion (i.e. it blocks until the
> user clicks the ok button). This is realized using gtk_dialog_run
> and gtk_dialog_response, as you can see below:
>
>
> /*
> ---------------------------------------------------------------------------
>-- */ #include <gtk/gtk.h>
>
> #include "dialog_messagebox.h"
> #include "interface.h"
> #include "support.h"
>
> #include "sbs_login_gui_support.h"
>
> void dialog_messagebox(char *title, char *text, char *text_button_ok)
> {
> extern GList *sbs_dialogs;
> GtkWidget *dialog_messagebox;
> GtkWidget *label;
> GtkWidget *label_button_ok;
>
> dialog_messagebox = create_dialog_messagebox();
>
> sbs_dialog_list_insert(dialog_messagebox,"dialog_messagebox",&sbs_dialogs)
>;
>
> gtk_window_set_title(GTK_WINDOW(dialog_messagebox), _(title));
>
> label = lookup_widget(dialog_messagebox, "dialog_messagebox_label");
> gtk_label_set_text(GTK_LABEL(label),_(text));
>
> label_button_ok = lookup_widget(dialog_messagebox,
> "dialog_messagebox_label_button_ok");
> gtk_label_set_markup_with_mnemonic(GTK_LABEL(label_button_ok),
> _(text_button_ok));
>
> gtk_dialog_run(GTK_DIALOG(dialog_messagebox));
>
> gtk_widget_destroy(dialog_messagebox);
> sbs_dialog_list_delete("dialog_messagebox", &sbs_dialogs);
> }
>
> void on_dialog_messagebox_button_ok_clicked (GtkButton *button,
> gpointer user_data)
> {
> extern GList *sbs_dialogs;
> GtkWidget *dialog_messagebox;
>
> dialog_messagebox = sbs_dialog_list_get("dialog_messagebox",
> sbs_dialogs);
> gtk_dialog_response(GTK_DIALOG(dialog_messagebox),GTK_RESPONSE_OK);
> }
>
> /*
> ---------------------------------------------------------------------------
>-- */
>
> Now I use such a messagebox quite frequently, eg. in many
> callback functions of other dialogs, in the following way:
>
> void on_some_dialog_some_callback(...)
> {
> ...
> dialog_messagebox("A Dialog", "This is the message...", "OK");
> ...
> }
>
> The call to "dialog_messagebox" blocks until the user clicks on the ok
> Button.
>
> This works fine under gtk+-X11, but it behaves very strangely under
> gtk+-directfb. In the latter case the messagebox pops up, and after the
> klick on the OK button it is properly destroyed and disapperars from the
> screen. But from now any dialogs which were/are on the screen are not
> responsible any more, ie. I cannot click buttons, activate entrys, etc.
> What I can do is to move the dialogs (using the built-in "window-manager"),
> the dialogs are repainted correctly. But I can not interact with them.
>
> So maybe someone has an idea on what could be wrong here...?
>
> Thanks and best regards
> Christian
>
>
> _______________________________________________
> directfb-users mailing list
> [email protected]
> http://mail.directfb.org/cgi-bin/mailman/listinfo/directfb-users
#include <gtk/gtk.h>
/* Function prototypes */
GtkWidget *create_dialog1(void);
GtkWidget *create_dialog2(void);
void on_okbutton1_clicked(GtkButton * button, gpointer user_data);
void on_okbutton2_clicked(GtkButton * button, gpointer user_data);
/* Globals */
GtkWidget *dialog1;
GtkWidget *dialog2;
int main(int argc, char *argv[])
{
gtk_init(&argc, &argv);
if (!g_thread_supported())
g_thread_init(NULL);
gdk_threads_init();
dialog1 = create_dialog1();
gtk_widget_show(dialog1);
gdk_threads_enter();
gtk_main();
gdk_threads_leave();
return 0;
}
/* Callback functions */
void on_okbutton1_clicked(GtkButton * button, gpointer user_data)
{
extern GtkWidget *dialog2;
dialog2 = create_dialog2();
#ifdef _DIRECTFB
gdk_threads_enter();
gtk_dialog_run(GTK_DIALOG(dialog2));
gdk_threads_leave();
#else
gtk_dialog_run(GTK_DIALOG(dialog2));
#endif
gtk_widget_destroy(dialog2);
}
void on_okbutton2_clicked(GtkButton * button, gpointer user_data)
{
extern GtkWidget *dialog2;
gtk_dialog_response(GTK_DIALOG(dialog2), GTK_RESPONSE_OK);
}
/* Create dialogs... */
GtkWidget *create_dialog1(void)
{
GtkWidget *dialog1;
GtkWidget *dialog_vbox1;
GtkWidget *label1;
GtkWidget *dialog_action_area1;
GtkWidget *okbutton1;
dialog1 = gtk_dialog_new();
gtk_window_set_title(GTK_WINDOW(dialog1), "dialog1");
gtk_window_set_position(GTK_WINDOW(dialog1), GTK_WIN_POS_CENTER_ALWAYS);
gtk_window_set_type_hint(GTK_WINDOW(dialog1), GDK_WINDOW_TYPE_HINT_DIALOG);
dialog_vbox1 = GTK_DIALOG(dialog1)->vbox;
gtk_widget_show(dialog_vbox1);
label1 = gtk_label_new("Dialog1");
gtk_widget_show(label1);
gtk_box_pack_start(GTK_BOX(dialog_vbox1), label1, FALSE, FALSE, 0);
gtk_misc_set_padding(GTK_MISC(label1), 40, 20);
dialog_action_area1 = GTK_DIALOG(dialog1)->action_area;
gtk_widget_show(dialog_action_area1);
gtk_button_box_set_layout(GTK_BUTTON_BOX(dialog_action_area1), GTK_BUTTONBOX_END);
okbutton1 = gtk_button_new_from_stock("gtk-ok");
gtk_widget_show(okbutton1);
gtk_dialog_add_action_widget(GTK_DIALOG(dialog1), okbutton1, GTK_RESPONSE_OK);
GTK_WIDGET_SET_FLAGS(okbutton1, GTK_CAN_DEFAULT);
g_signal_connect((gpointer) okbutton1, "clicked", G_CALLBACK(on_okbutton1_clicked), NULL);
return dialog1;
}
GtkWidget *create_dialog2(void)
{
GtkWidget *dialog2;
GtkWidget *dialog_vbox2;
GtkWidget *label2;
GtkWidget *dialog_action_area2;
GtkWidget *okbutton2;
dialog2 = gtk_dialog_new();
gtk_window_set_title(GTK_WINDOW(dialog2), "dialog2");
gtk_window_set_position(GTK_WINDOW(dialog2), GTK_WIN_POS_CENTER_ALWAYS);
gtk_window_set_type_hint(GTK_WINDOW(dialog2), GDK_WINDOW_TYPE_HINT_DIALOG);
dialog_vbox2 = GTK_DIALOG(dialog2)->vbox;
gtk_widget_show(dialog_vbox2);
label2 = gtk_label_new("Dialog2");
gtk_widget_show(label2);
gtk_box_pack_start(GTK_BOX(dialog_vbox2), label2, FALSE, FALSE, 0);
gtk_misc_set_padding(GTK_MISC(label2), 10, 10);
dialog_action_area2 = GTK_DIALOG(dialog2)->action_area;
gtk_widget_show(dialog_action_area2);
gtk_button_box_set_layout(GTK_BUTTON_BOX(dialog_action_area2), GTK_BUTTONBOX_END);
okbutton2 = gtk_button_new_from_stock("gtk-ok");
gtk_widget_show(okbutton2);
gtk_dialog_add_action_widget(GTK_DIALOG(dialog2), okbutton2, GTK_RESPONSE_OK);
GTK_WIDGET_SET_FLAGS(okbutton2, GTK_CAN_DEFAULT);
g_signal_connect((gpointer) okbutton2, "clicked", G_CALLBACK(on_okbutton2_clicked), NULL);
return dialog2;
}
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