/* example-start text text.c *//* text.c */#include <stdio.h>#include <gtk/gtk.h>void text_toggle_editable (GtkWidget *checkbutton,			   GtkWidget *text){  gtk_text_set_editable(GTK_TEXT(text),			GTK_TOGGLE_BUTTON(checkbutton)->active);}void text_toggle_word_wrap (GtkWidget *checkbutton,			    GtkWidget *text){  gtk_text_set_word_wrap(GTK_TEXT(text),			 GTK_TOGGLE_BUTTON(checkbutton)->active);}void close_application( GtkWidget *widget, gpointer data ){       gtk_main_quit();}int main (int argc, char *argv[]){  GtkWidget *window;  GtkWidget *box1;  GtkWidget *box2;  GtkWidget *hbox;  GtkWidget *button;  GtkWidget *check;  GtkWidget *separator;  GtkWidget *table;  GtkWidget *vscrollbar;  GtkWidget *text;  GdkColormap *cmap;  GdkColor colour;  GdkFont *fixed_font;  FILE *infile;  gtk_init (&argc, &argv);   window = gtk_window_new (GTK_WINDOW_TOPLEVEL);  gtk_widget_set_usize (window, 600, 500);  gtk_window_set_policy (GTK_WINDOW(window), TRUE, TRUE, FALSE);    gtk_signal_connect (GTK_OBJECT (window), "destroy",		      GTK_SIGNAL_FUNC(close_application),		      NULL);  gtk_window_set_title (GTK_WINDOW (window), "Text Widget Example");  gtk_container_set_border_width (GTK_CONTAINER (window), 0);      box1 = gtk_vbox_new (FALSE, 0);  gtk_container_add (GTK_CONTAINER (window), box1);  gtk_widget_show (box1);      box2 = gtk_vbox_new (FALSE, 10);  gtk_container_set_border_width (GTK_CONTAINER (box2), 10);  gtk_box_pack_start (GTK_BOX (box1), box2, TRUE, TRUE, 0);  gtk_widget_show (box2);      table = gtk_table_new (2, 2, FALSE);  gtk_table_set_row_spacing (GTK_TABLE (table), 0, 2);  gtk_table_set_col_spacing (GTK_TABLE (table), 0, 2);  gtk_box_pack_start (GTK_BOX (box2), table, TRUE, TRUE, 0);  gtk_widget_show (table);    /* Create the GtkText widget */  text = gtk_text_new (NULL, NULL);  gtk_text_set_editable (GTK_TEXT (text), TRUE);  gtk_table_attach (GTK_TABLE (table), text, 0, 1, 0, 1,		    GTK_EXPAND | GTK_SHRINK | GTK_FILL,		    GTK_EXPAND | GTK_SHRINK | GTK_FILL, 0, 0);  gtk_widget_show (text);  /* Add a vertical scrollbar to the GtkText widget */  vscrollbar = gtk_vscrollbar_new (GTK_TEXT (text)->vadj);  gtk_table_attach (GTK_TABLE (table), vscrollbar, 1, 2, 0, 1,		    GTK_FILL, GTK_EXPAND | GTK_SHRINK | GTK_FILL, 0, 0);  gtk_widget_show (vscrollbar);  /* Get the system colour map and allocate the colour red */  cmap = gdk_colormap_get_system();  colour.red = 0xffff;  colour.green = 0;  colour.blue = 0;  if (!gdk_color_alloc(cmap, &colour)) {    g_error("couldn't allocate colour");  }  /* Load a fixed font */  fixed_font = gdk_font_load ("-misc-fixed-medium-r-*-*-*-140-*-*-*-*-*-*");  /* Realizing a widget creates a window for it, ready for us to insert some text */  gtk_widget_realize (text);  /* Freeze the text widget, ready for multiple updates */  gtk_text_freeze (GTK_TEXT (text));    /* Insert some coloured text */  gtk_text_insert (GTK_TEXT (text), NULL, &text->style->black, NULL,		   "Supports ", -1);  gtk_text_insert (GTK_TEXT (text), NULL, &colour, NULL,		   "colored ", -1);  gtk_text_insert (GTK_TEXT (text), NULL, &text->style->black, NULL,		   "text and different ", -1);  gtk_text_insert (GTK_TEXT (text), fixed_font, &text->style->black, NULL,		   "fonts\n\n", -1);    /* Load the file text.c into the text window */  infile = fopen("text.c", "r");    if (infile) {    char buffer[1024];    int nchars;        while (1)      {	nchars = fread(buffer, 1, 1024, infile);	gtk_text_insert (GTK_TEXT (text), fixed_font, NULL,			 NULL, buffer, nchars);		if (nchars < 1024)	  break;      }        fclose (infile);  }  /* Thaw the text widget, allowing the updates to become visible */    gtk_text_thaw (GTK_TEXT (text));    hbox = gtk_hbutton_box_new ();  gtk_box_pack_start (GTK_BOX (box2), hbox, FALSE, FALSE, 0);  gtk_widget_show (hbox);  check = gtk_check_button_new_with_label("Editable");  gtk_box_pack_start (GTK_BOX (hbox), check, FALSE, FALSE, 0);  gtk_signal_connect (GTK_OBJECT(check), "toggled",		      GTK_SIGNAL_FUNC(text_toggle_editable), text);  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(check), TRUE);  gtk_widget_show (check);  check = gtk_check_button_new_with_label("Wrap Words");  gtk_box_pack_start (GTK_BOX (hbox), check, FALSE, TRUE, 0);  gtk_signal_connect (GTK_OBJECT(check), "toggled",		      GTK_SIGNAL_FUNC(text_toggle_word_wrap), text);  gtk_toggle_button_set_active(GTK_TOGGLE_BUTTON(check), FALSE);  gtk_widget_show (check);  separator = gtk_hseparator_new ();  gtk_box_pack_start (GTK_BOX (box1), separator, FALSE, TRUE, 0);  gtk_widget_show (separator);  box2 = gtk_vbox_new (FALSE, 10);  gtk_container_set_border_width (GTK_CONTAINER (box2), 10);  gtk_box_pack_start (GTK_BOX (box1), box2, FALSE, TRUE, 0);  gtk_widget_show (box2);    button = gtk_button_new_with_label ("close");  gtk_signal_connect (GTK_OBJECT (button), "clicked",		      GTK_SIGNAL_FUNC(close_application),		      NULL);  gtk_box_pack_start (GTK_BOX (box2), button, TRUE, TRUE, 0);  GTK_WIDGET_SET_FLAGS (button, GTK_CAN_DEFAULT);  gtk_widget_grab_default (button);  gtk_widget_show (button);  gtk_widget_show (window);  gtk_main ();    return(0);       }/* example-end */