/usr/share/help/gl/gnome-devel-demos/togglebutton.c.page is in gnome-devel-docs 3.28.0-1.
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<page xmlns="http://projectmallard.org/1.0/" xmlns:its="http://www.w3.org/2005/11/its" xmlns:xi="http://www.w3.org/2001/XInclude" type="guide" style="task" id="togglebutton.c" xml:lang="gl">
<info>
<title type="text">ToggleButton (C)</title>
<link type="guide" xref="c#buttons"/>
<link type="seealso" xref="grid.c"/>
<link type="seealso" xref="switch.c"/>
<revision version="0.1" date="2012-06-12" status="draft"/>
<credit type="author copyright">
<name>Monica Kochofar</name>
<email its:translate="no">monicakochofar@gmail.com</email>
<years>2012</years>
</credit>
<desc>Un botón que mantén o seu estado</desc>
<mal:credit xmlns:mal="http://projectmallard.org/1.0/" type="translator copyright">
<mal:name>Fran Dieguez</mal:name>
<mal:email>frandieguez@gnome.org</mal:email>
<mal:years>2012-2013.</mal:years>
</mal:credit>
</info>
<title>ToggleButton</title>
<media type="image" mime="image/png" src="media/togglebutton.png"/>
<p>Cando este ToggleButton está no estado activo, o spinner xira.</p>
<code mime="text/x-csrc" style="numbered">
#include <gtk/gtk.h>
/*This is the callback function. It is a handler function
which reacts to the signal. In this case, it will cause the
spinner to start and stop according to how many times the user
presses the button.*/
static void
button_toggled_cb (GtkWidget *button,
gpointer user_data)
{
GtkWidget *spinner = user_data;
if (gtk_toggle_button_get_active (GTK_TOGGLE_BUTTON(button)))
gtk_spinner_start (GTK_SPINNER (spinner));
else {
gtk_spinner_stop (GTK_SPINNER (spinner));
}
}
static void
activate (GtkApplication *app,
gpointer user_data)
{
GtkWidget *window;
GtkWidget *button;
GtkWidget *grid;
GtkWidget *spinner;
/*Create a window with a title, border width and a default size*/
window = gtk_application_window_new (app);
gtk_window_set_title (GTK_WINDOW (window), "ToggleButton Example");
gtk_window_set_default_size (GTK_WINDOW (window), 300, 300);
gtk_container_set_border_width(GTK_CONTAINER(window), 30);
/*Create a togglebutton with a label*/
button = gtk_toggle_button_new_with_label ("Start/Stop");
/*Create a spinner, with extra horizontal and vertical space*/
spinner = gtk_spinner_new ();
gtk_widget_set_hexpand (spinner, TRUE);
gtk_widget_set_vexpand (spinner, TRUE);
/*Create a grid and set the row spacing, attach the togglebutton
and spinner onto the grid and position them accordingly*/
grid = gtk_grid_new();
gtk_grid_set_row_homogeneous (GTK_GRID (grid), FALSE);
gtk_grid_set_row_spacing (GTK_GRID (grid), 15);
gtk_grid_attach (GTK_GRID (grid), spinner, 0, 0, 1, 1);
gtk_grid_attach (GTK_GRID (grid), button, 0, 1, 1, 1);
gtk_container_add (GTK_CONTAINER (window), grid);
/*Connecting the toggled signal to the callback*/
g_signal_connect (GTK_TOGGLE_BUTTON (button), "toggled",
G_CALLBACK (button_toggled_cb), spinner);
gtk_widget_show_all (window);
}
int
main (int argc, char **argv)
{
GtkApplication *app;
int status;
app = gtk_application_new ("org.gtk.example", G_APPLICATION_FLAGS_NONE);
g_signal_connect (app, "activate", G_CALLBACK (activate), NULL);
status = g_application_run (G_APPLICATION (app), argc, argv);
g_object_unref (app);
return status;
}
</code>
<p>Neste exemplo empregaremos o seguinte:</p>
<list>
<item><p><link href="http://developer.gnome.org/gtk3/3.4/GtkApplication.html">GtkApplication</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/3.4/GtkWindow.html">GtkWindow</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/stable/GtkSpinner.html">GtkSpinner</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/stable/GtkToggleButton.html">GtkTogglebutton</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/stable/GtkGrid.html">GtkGrid</link></p></item>
</list>
</page>
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