# Dialog (C)

Monica Kochofar
monicakochofar@gmail.com 2012
A popup window
Fran Dieguez
frandieguez@gnome.org 2012-2013.

# Diálogo

A dialog window that pops up when a button is pressed.

#include <gtk/gtk.h>

/*Callback function in which reacts to the "response" signal. Be sure to place it before the function it is called in*/ static void on_response (GtkDialog *dialog, gint response_id, gpointer user_data) { /*For demonstration purposes, this will show the int value of the response type*/ g_print ("response is %d\n", response_id);

/*This will cause the dialog to be destroyed*/ gtk_widget_destroy (GTK_WIDGET (dialog)); }

/*Callback function in which reacts to the "clicked" signal*/ static void show_dialog (GtkButton *button, gpointer user_data) { GtkWindow *window = user_data; GtkWidget *dialog; GtkWidget *content_area; GtkWidget *label;

gint response_id;

/*Create the dialog window. Modal windows prevent interaction with other windows in the same application*/ dialog = gtk_dialog_new_with_buttons ("A Gtk+ Dialog", window, GTK_DIALOG_MODAL, GTK_STOCK_OK, GTK_RESPONSE_OK, NULL);

/*Create a label and attach it to the content area of the dialog*/ content_area = gtk_dialog_get_content_area (GTK_DIALOG (dialog)); label = gtk_label_new ("This demonstrates a dialog with a label"); gtk_container_add (GTK_CONTAINER (content_area), label);

/*The main purpose of this is to show dialog's child widget, label*/ gtk_widget_show_all (dialog);

/*Connecting the "response" signal from the user to the associated callback function*/ g_signal_connect (GTK_DIALOG (dialog), "response", G_CALLBACK (on_response), NULL);

}

static void activate (GtkApplication *app, gpointer user_data) { GtkWidget *window; GtkWidget *button;

/*Create a window with a title and a default size*/ window = gtk_application_window_new (app); gtk_window_set_title (GTK_WINDOW (window), "GNOME Button"); gtk_window_set_default_size (GTK_WINDOW (window), 250, 50);

/*Create a button with a label, and add it to the window*/ button = gtk_button_new_with_label ("Click Me"); gtk_container_add (GTK_CONTAINER (window), button);

/*Connecting the clicked signal to the callback*/ g_signal_connect (GTK_BUTTON (button), "clicked", G_CALLBACK (show_dialog), GTK_WINDOW (window));

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; }

Neste exemplo empregaremos o seguinte:

GtkApplication

GtkWindow

GtkDialog

GtkLabel