forked from AuroraMiddleware/gtk
82f6ccd79c
2008-08-11 Sven Neumann <sven@gimp.org> * examples/*: updated the (quite outdated) examples to use canonical signal names as well. Removed some unneeded casts and trailing whitespace while I was on it... svn path=/trunk/; revision=21071
112 lines
3.2 KiB
C
112 lines
3.2 KiB
C
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#include <stdlib.h>
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#include <gtk/gtk.h>
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#include <time.h>
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#include <string.h>
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GtkWidget *selection_button;
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GtkWidget *selection_widget;
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/* Callback when the user toggles the selection */
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static void selection_toggled( GtkWidget *widget,
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gint *have_selection )
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{
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if (GTK_TOGGLE_BUTTON (widget)->active)
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{
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*have_selection = gtk_selection_owner_set (selection_widget,
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GDK_SELECTION_PRIMARY,
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GDK_CURRENT_TIME);
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/* if claiming the selection failed, we return the button to
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the out state */
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if (!*have_selection)
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (widget), FALSE);
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}
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else
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{
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if (*have_selection)
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{
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/* Before clearing the selection by setting the owner to NULL,
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we check if we are the actual owner */
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if (gdk_selection_owner_get (GDK_SELECTION_PRIMARY) == widget->window)
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gtk_selection_owner_set (NULL, GDK_SELECTION_PRIMARY,
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GDK_CURRENT_TIME);
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*have_selection = FALSE;
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}
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}
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}
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/* Called when another application claims the selection */
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static gboolean selection_clear( GtkWidget *widget,
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GdkEventSelection *event,
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gint *have_selection )
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{
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*have_selection = FALSE;
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gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (selection_button), FALSE);
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return TRUE;
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}
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/* Supplies the current time as the selection. */
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static void selection_handle( GtkWidget *widget,
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GtkSelectionData *selection_data,
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guint info,
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guint time_stamp,
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gpointer data )
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{
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gchar *timestr;
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time_t current_time;
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current_time = time (NULL);
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timestr = asctime (localtime (¤t_time));
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/* When we return a single string, it should not be null terminated.
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That will be done for us */
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gtk_selection_data_set (selection_data, GDK_SELECTION_TYPE_STRING,
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8, timestr, strlen (timestr));
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}
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int main( int argc,
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char *argv[] )
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{
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GtkWidget *window;
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static int have_selection = FALSE;
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gtk_init (&argc, &argv);
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/* Create the toplevel window */
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window = gtk_window_new (GTK_WINDOW_TOPLEVEL);
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gtk_window_set_title (GTK_WINDOW (window), "Event Box");
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gtk_container_set_border_width (GTK_CONTAINER (window), 10);
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g_signal_connect (window, "destroy",
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G_CALLBACK (exit), NULL);
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/* Create a toggle button to act as the selection */
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selection_widget = gtk_invisible_new ();
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selection_button = gtk_toggle_button_new_with_label ("Claim Selection");
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gtk_container_add (GTK_CONTAINER (window), selection_button);
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gtk_widget_show (selection_button);
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g_signal_connect (selection_button, "toggled",
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G_CALLBACK (selection_toggled), &have_selection);
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g_signal_connect (selection_widget, "selection-clear-event",
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G_CALLBACK (selection_clear), &have_selection);
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gtk_selection_add_target (selection_widget,
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GDK_SELECTION_PRIMARY,
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GDK_SELECTION_TYPE_STRING,
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1);
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g_signal_connect (selection_widget, "selection-get",
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G_CALLBACK (selection_handle), &have_selection);
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gtk_widget_show (selection_button);
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gtk_widget_show (window);
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gtk_main ();
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return 0;
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}
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