mirror of
https://gitlab.gnome.org/GNOME/gtk.git
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107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
/* This file extracted from the GTK tutorial. */
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/* setselection.c */
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#include <gtk/gtk.h>
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#include <time.h>
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/* Callback when the user toggles the selection */
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void
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selection_toggled (GtkWidget *widget, 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 (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_state (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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gint
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selection_clear (GtkWidget *widget, 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_state (GTK_TOGGLE_BUTTON(widget), 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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void
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selection_handle (GtkWidget *widget,
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GtkSelectionData *selection_data,
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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
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main (int argc, char *argv[])
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{
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GtkWidget *window;
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GtkWidget *selection_button;
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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_border_width (GTK_CONTAINER (window), 10);
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gtk_signal_connect (GTK_OBJECT (window), "destroy",
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GTK_SIGNAL_FUNC (gtk_exit), NULL);
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/* Create a toggle button to act as the selection */
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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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gtk_signal_connect (GTK_OBJECT(selection_button), "toggled",
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GTK_SIGNAL_FUNC (selection_toggled), &have_selection);
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gtk_signal_connect (GTK_OBJECT(selection_button), "selection_clear_event",
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GTK_SIGNAL_FUNC (selection_clear), &have_selection);
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gtk_selection_add_handler (selection_button, GDK_SELECTION_PRIMARY,
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GDK_SELECTION_TYPE_STRING,
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selection_handle, NULL);
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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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