Re: text with links

[Lance Dillon <riffraff169 yahoo com>]

This example code does it.  You may want to make some changes, but it works.
#include <stdio.h>
#include <gtk/gtk.h>

GtkTextTag *tag1;

static void print_coords(GtkWidget *w, int x, int y) {
  gint bx,by;
  GtkTextIter iter;
  gint trail;
  gtk_text_view_window_to_buffer_coords(GTK_TEXT_VIEW(w),GTK_TEXT_WINDOW_WIDGET,
        x,y,&bx,&by);
  gtk_text_view_get_iter_at_position(GTK_TEXT_VIEW(w),&iter,&trail,bx,by);
  if (gtk_text_iter_has_tag(&iter,tag1))
    g_debug("CLICKED ON LINK!");
}

static void click_link(GtkWidget *w, GdkEventButton *ev, gpointer g) {
  g_debug("x==%f",ev->x);
  g_debug("y==%f",ev->y);
  g_debug("button==%d",ev->button);
  switch (ev->type) {
    case GDK_BUTTON_PRESS:
      g_debug("type==single click");
      print_coords(w,(int)ev->x,(int)ev->y);
      break;
/*
    case GDK_2BUTTON_PRESS:
      g_debug("type==double click");
      break;
    case GDK_3BUTTON_PRESS:
      g_debug("type==triple click");
      break;
    case GDK_BUTTON_RELEASE:
      g_debug("type==button release");
      break;
*/
    default:
      break;
  }
}

int main(int argc, char **argv) {
  GtkTextBuffer *buffer;
  GtkTextView *tv;
  GtkWidget *w;
  GtkTextIter iter;
  GtkTextTagTable *tb;

  gtk_init(&argc, &argv);

  w=gtk_window_new(GTK_WINDOW_TOPLEVEL);
  g_signal_connect(G_OBJECT(w),"delete_event",G_CALLBACK(gtk_false),NULL);
  g_signal_connect(G_OBJECT(w),"destroy",G_CALLBACK(gtk_main_quit),NULL);
  tv=GTK_TEXT_VIEW(gtk_text_view_new());
  gtk_container_add(GTK_CONTAINER(w),GTK_WIDGET(tv));
  buffer=gtk_text_view_get_buffer(tv);
  gtk_widget_set_size_request(GTK_WIDGET(w),300,300);
  gtk_text_view_set_editable(tv,FALSE);

  tb=gtk_text_buffer_get_tag_table(buffer);
  tag1=gtk_text_tag_new("link");
  g_object_set(G_OBJECT(tag1),"underline",PANGO_UNDERLINE_SINGLE,NULL);
  g_object_set(G_OBJECT(tag1),"foreground","blue",NULL);
  gtk_text_tag_table_add(GTK_TEXT_TAG_TABLE(tb),tag1);

  gtk_text_buffer_get_iter_at_offset(buffer,&iter,0);
  gtk_text_buffer_insert(buffer,&iter,"This is some sample text.\n\nA link is ",-1);
  gtk_text_buffer_insert_with_tags(buffer,&iter,"here",-1,tag1,NULL);
  gtk_text_buffer_insert(buffer,&iter,".\n\nMore text...\n",-1);
  g_signal_connect(G_OBJECT(tv),"button-press-event",G_CALLBACK(click_link),NULL);
  gtk_widget_show_all(w);
  gtk_main();

  return 0;
}