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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="grid.c" xml:lang="gl">
<info>
<title type="text">Grid (C)</title>
<link type="guide" xref="c#layout"/>
<revision version="0.1" date="2012-06-04" status="draft"/>
<credit type="author copyright">
<name>Monica Kochofar</name>
<email its:translate="no">monicakochofar@gmail.com</email>
<years>2012</years>
</credit>
<desc>Pack widgets in rows and columns</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>Grade</title>
<media type="image" mime="image/png" src="media/grid.png"/>
<p>A button widget connected to a progress bar.</p>
<code mime="text/x-csrc" style="numbered">
#include <gtk/gtk.h>
/*Signal handler for the "clicked" signal of the Button. Each
click generates a progress bar pulse*/
static void
on_button_click (GtkButton *button,
gpointer user_data)
{
GtkProgressBar *progress_bar = user_data;
gtk_progress_bar_pulse (progress_bar);
}
static void
activate (GtkApplication *app,
gpointer user_data)
{
GtkWidget *grid;
GtkWidget *window;
GtkWidget *button;
GtkWidget *progress_bar;
/*Create the window and set a title*/
window = gtk_application_window_new (app);
gtk_window_set_title (GTK_WINDOW (window), "Grid Example");
/*Create a button with a label*/
button = gtk_button_new_with_label ("Button");
/*Create the progress bar*/
progress_bar = gtk_progress_bar_new ();
/*Create a grid and attach the button and progress bar
accordingly*/
grid = gtk_grid_new ();
gtk_grid_attach (GTK_GRID (grid), button, 1, 1, 1, 1);
gtk_grid_attach_next_to (GTK_GRID (grid),
progress_bar,
button,
GTK_POS_BOTTOM, 1, 1);
/*Connecting the clicked signal to the callback function*/
g_signal_connect (GTK_BUTTON (button), "clicked",
G_CALLBACK (on_button_click), progress_bar);
gtk_container_add (GTK_CONTAINER (window), GTK_WIDGET (grid));
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/GtkProgressBar.html">GtkProgressBar</link></p></item>
<item><p><link href="http://developer.gnome.org/gtk3/stable/GtkButton.html">GtkButton</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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