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#include <gtk/gtk.h>
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/*This is the callback function. It is a handler function
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which reacts to the signal. In this case, it will cause the
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spinner to start and stop according to how many times the user
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presses the button.*/
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static void
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button_toggled_cb (GtkWidget *button,
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gpointer user_data)
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{
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GtkWidget *spinner = user_data;
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if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON(button)))
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gtk_spinner_start (GTK_SPINNER (spinner));
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else {
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gtk_spinner_stop (GTK_SPINNER (spinner));
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}
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}
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static void
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activate (GtkApplication *app,
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gpointer user_data)
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{
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GtkWidget *window;
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GtkWidget *button;
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GtkWidget *grid;
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GtkWidget *spinner;
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/*Create a window with a title, border width and a default size*/
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window = gtk_application_window_new (app);
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gtk_window_set_title (GTK_WINDOW (window), "ToggleButton Example");
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gtk_window_set_default_size (GTK_WINDOW (window), 300, 300);
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gtk_container_set_border_width(GTK_CONTAINER(window), 30);
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/*Create a togglebutton with a label*/
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button = gtk_toggle_button_new_with_label ("Start/Stop");
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/*Create a spinner, with extra horizontal and vertical space*/
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spinner = gtk_spinner_new ();
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gtk_widget_set_hexpand (spinner, TRUE);
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gtk_widget_set_vexpand (spinner, TRUE);
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/*Create a grid and set the row spacing, attach the togglebutton
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and spinner onto the grid and position them accordingly*/
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grid = gtk_grid_new();
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gtk_grid_set_row_homogeneous (GTK_GRID (grid), FALSE);
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gtk_grid_set_row_spacing (GTK_GRID (grid), 15);
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gtk_grid_attach (GTK_GRID (grid), spinner, 0, 0, 1, 1);
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gtk_grid_attach (GTK_GRID (grid), button, 0, 1, 1, 1);
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gtk_container_add (GTK_CONTAINER (window), grid);
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/*Connecting the toggled signal to the callback*/
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g_signal_connect (GTK_TOGGLE_BUTTON (button), "toggled",
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G_CALLBACK (button_toggled_cb), spinner);
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gtk_widget_show_all (window);
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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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GtkApplication *app;
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int status;
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app = gtk_application_new ("org.gtk.example", G_APPLICATION_FLAGS_NONE);
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g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
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status = g_application_run (G_APPLICATION (app), argc, argv);
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g_object_unref (app);
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return status;
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}
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