GTK gossip: timeout and idle

You can use g_timeout_add () or g_timeout_add_full () and g_timeout_add () to set the values of g_timeout_add () as follows: Guint g_timeout_add (guint interval, Gsourcefunc Function, Gpointer Data ); The first parameter is the time interval, in milliseconds, and the second parameter is the time-to-call function, the third response is the information sent to the callback function Internal Generation and stop of Signal For example, you can use g_timeout_add () to change the values as follows, and the results of the rows are the same: G_timeout_demo.c # Include <GTK/GTK. h> Gboolean timeout_callback (gtkbutton * button ){ Static Gint COUNT = 0; If (count <5 ){ G_signal_emit_by_name (button, "clicked "); Count ++; Return true; } Else { Return false; } } // Callback function Void button_clicked (gtkwidget * button, gpointer data ){ G_print ("Press": % s/n ", (char *) data ); } Int main (INT argc, char * argv []) { Gtkwidget * window; Gtkwidget * button; Gtk_init (& argc, & argv ); Window = gtk_window_new (gtk_window_toplevel ); Gtk_window_set_title (gtk_window (window), "haha! GTK +! "); Button = gtk_button_new_with_label ("press me "); Gtk_container_add (gtk_container (window), button ); G_signal_connect (gtk_object (window), "Destroy ", G_callback (gtk_main_quit), null ); G_signal_connect (gtk_object (button), "clicked ", G_callback (button_clicked), "haha! Press confirm! "); G_timeout_add (1000, (gsourcefunc) timeout_callback, button ); Gtk_widget_show (window ); Gtk_widget_show (button ); Gtk_main (); Return 0; } In the callback method, if the return value is true, the next time is used, The next time the timer is scheduled, it starts after the callback function is completed, When the value is set to false, the timer ends and auto-renewal is triggered. If you use G_timeout_add_full (): Guint g_timeout_add_full (Gint priority, Guint interval, Gsourcefunc function, Gpointer data, Gdestroypolicy notify ); The first Shard is the primary row permission of the hour to the hour. You can set the primary privilege as follows: G_priority_high G_priority_default (reset) G_priority_high_idle G_priority_default_idle G_priority_low The last response is a function to be written when the timer is removed. For a specific operation, you can use the g_idle_add () or g_idle_add_full () function, when the program does nothing (for example, there is no user operation, there is no program execution time to run), you can also do something, if g_idle_add () is used (): Guint g_idle_add (gsourcefunc function, Gpointer data ); The first response is the callback function, and the second response is the information sent to the callback function. For example, in the following example, when the user does not do anything, the interface returns the specified idle function of the row, and the callback function of the row according to the specified value when the row is pressed: G_idle_demo.c # Include <GTK/GTK. h> Gboolean idle_callback (gpointer data ){ G_print ("% S .. XD/N ", data ); Return true; } Void button_pressed (gtkbutton * button, gpointer data ){ Int I; For (I = 0; I <10; I ++ ){ G_print ("% s.../N", data ); Sleep (1 ); } } Int main (INT argc, char * argv []) { Gtkwidget * window; Gtkwidget * button; Gtk_init (& argc, & argv ); Window = gtk_window_new (gtk_window_toplevel ); Gtk_window_set_title (gtk_window (window), "gtimer "); Gtk_window_set_default_size (gtk_window (window), 150, 50 ); Button = gtk_button_new_with_label ("press me "); Gtk_container_add (gtk_container (window), button ); G_signal_connect (gtk_object (button), "clicked ", G_callback (button_pressed), "Do something "); G_signal_connect (gtk_object (window), "Destroy ", G_callback (gtk_main_quit), null ); G_idle_add (gsourcefunc) idle_callback, "No action "); Gtk_widget_show_all (window ); Gtk_main (); Return 0; } Similarly, if the specified idle function is set to false, the idle function is removed. G_idle_add_full (): Guint g_idle_add_full (Gint priority, Gsourcefunc function, Gpointer data, Gdestroypolicy notify ); The vertex number is similar to g_timeout_add_full.

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