Introduction
In this example, we create a multi-line text area that the user can type in. It is possible to create a read-only text area, but the text area in this example is editable. If we added a menu bar, a toolbar, and the code to do a few basic things like opening and saving files, cutting and pasting text, and such, we’d have a very basic yet functional text editor.
Source Code
/*
*File name: text.c
*/#include <gtk/gtk.h>
#include <glib.h>/*– This function allows the program to exit properly when the window is closed –*/
gint destroyapp (GtkWidget *widget, gpointer gdata)
{
g_print (“Quitting…\n”);
gtk_main_quit();
return (FALSE);
}int main (int argc, char *argv[])
{
/*– Declare the GTK Widgets used in the program –*/
GtkWidget *window;
GtkWidget *text;gchar *buffer = “This is some sample text”;
/*–Â Initialize GTK –*/
gtk_init (&argc, &argv);/*– Create the new window –*/
window = gtk_window_new(GTK_WINDOW_TOPLEVEL);/*– Create a text area –*/
text = gtk_text_new(NULL, NULL);/*– Set text area to be editable –*/
gtk_text_set_editable(GTK_TEXT (text), TRUE);/*– Connect the window to the destroyapp function –*/
gtk_signal_connect(GTK_OBJECT(window), “delete_event”, GTK_SIGNAL_FUNC(destroyapp), NULL);/*– Add the text area to the window –*/
gtk_container_add(GTK_CONTAINER(window), text);/*– Add some text to the window –*/
gtk_text_insert(GTK_TEXT(text), NULL, NULL, NULL, buffer, strlen(buffer));/*– Set window border to zero so that text area takes up the whole window –*/
gtk_container_border_width (GTK_CONTAINER (window), 0);/*– Set the window to be 640 x 200 pixels –*/
gtk_window_set_default_size (GTK_WINDOW(window), 640, 200);/*– Set the window title –*/
gtk_window_set_title(GTK_WINDOW (window), “Text Area”);/*– Display the widgets –*/
gtk_widget_show(text);
gtk_widget_show(window);/*– Start the GTK event loop –*/
gtk_main();/*– Return 0 if exit is successful –*/
return 0;
}
Compile the Source Code
gcc -Wall -g text.c -o text `gtk-config –cflags` `gtk-config –libs`
Execute the Program
./text
