Re: Opening a background window in a separate thread

["Dov Grobgeld" <dov grobgeld gmail com>]

Hi Ian,

The following change allows you to put the main window on top:

     g_signal_connect(G_OBJECT(dlgWin), "response", G_CALLBACK(dlgResponse), NULL);
     gtk_widget_show(dlgWin);
>   gtk_window_set_transient_for(GTK_WINDOW(dlgWin), NULL);
  }

You can also create the dialog with NULL as its parent widget, if you don't care that its initial placement will be in the middle of the main window.

Hope this helps.

Regards,
Dov

2008/12/2 Ian Puleston <ian underpressuredivers com>

> -----Original Message-----
> From: Ian Puleston
>

> I tried simply creating and showing the dialog window and then
> letting the thread return to the main loop. But with this I find that
> although the main window does respond to mouse clicks, it stays behind
> the dialog window while that is open. Is there something that I need to
> do to bring it to the front when its clicked on?

I hacked up a little program to demo this problem. Click the button in the main window and a non-modal dialog opens. You can click it numerous times and open many dialogs at the same time, and all respond to clicking their buttons fine. But when they are open the main window cannot be brought to the front.

Here's the code. What's missing?:

#include <gtk/gtk.h>

GtkWidget *mainWin;

/*============================================================================*/
/* The signal handler for responses from the dialog */
void dlgResponse(GtkDialog *dlgWin, gint responseId, gpointer data)
{
   switch (responseId)
   {
   case GTK_RESPONSE_ACCEPT:
   case GTK_RESPONSE_DELETE_EVENT:
       gtk_widget_destroy(GTK_WIDGET(dlgWin));
       break;
   }
}

/*============================================================================*/
/* Event handler for the delete event */
static gboolean delete_event(GtkWidget *widget, GdkEvent *event, gpointer data)
{
   gtk_main_quit();

   /* Let GTK process the destroy and terminate us */
   return FALSE;
}

/*============================================================================*/
void btnClick(GtkWidget *btn, gpointer data)
{
   GtkWidget *dlgWin;

   dlgWin = gtk_dialog_new_with_buttons("test", GTK_WINDOW(mainWin),
                                        GTK_DIALOG_DESTROY_WITH_PARENT,
                                        GTK_STOCK_OK, GTK_RESPONSE_ACCEPT,
                                        NULL);
   g_signal_connect(G_OBJECT(dlgWin), "response", G_CALLBACK(dlgResponse), NULL);
   gtk_widget_show(dlgWin);
}

/*============================================================================*/
int main(int argc, char *argv[])
{
   GtkWidget *vBox, *hBox;
   GtkWidget *button;

   gtk_init(&argc, &argv);

   mainWin = gtk_window_new(GTK_WINDOW_TOPLEVEL);
   gtk_window_set_title(GTK_WINDOW(mainWin), "Test Application");
   gtk_window_set_position(GTK_WINDOW(mainWin), GTK_WIN_POS_CENTER);
   gtk_window_set_default_size(GTK_WINDOW(mainWin), 500, 500);

   vBox = gtk_vbox_new(FALSE, 0);
   gtk_container_add(GTK_CONTAINER(mainWin), vBox);
   hBox = gtk_hbox_new(FALSE, 0);
   gtk_box_pack_start(GTK_BOX(vBox), hBox, FALSE, FALSE, 20);
   gtk_widget_show(hBox);

   button = gtk_button_new_with_label("Click me");
   gtk_box_pack_start(GTK_BOX(hBox), button, TRUE, FALSE, 0);
   g_signal_connect(G_OBJECT(button), "clicked", G_CALLBACK(btnClick), NULL);
   gtk_widget_show(button);

   gtk_widget_show(vBox);

   g_signal_connect(G_OBJECT(mainWin), "delete_event", G_CALLBACK(delete_event), NULL);
   gtk_container_set_border_width(GTK_CONTAINER(mainWin), 10);
   gtk_widget_show(mainWin);
   gtk_main();

   return 0;
}

/*============================================================================*/

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