1/* This is the application. */ 2public class MyApplication : Gtk.Application { 3 Gtk.Scale h_scale; 4 Gtk.Scale v_scale; 5 Gtk.Label label; 6 7 /* Override the 'activate' signal of GLib.Application. */ 8 protected override void activate () { 9 var window = new Gtk.ApplicationWindow (this); 10 window.title = "Scale Example"; 11 window.set_default_size (400, 300); 12 window.set_border_width (5); 13 14 h_scale = new Gtk.Scale.with_range (Gtk.Orientation.HORIZONTAL, 0.0, 100.0, 5.0); 15 h_scale.set_digits (0); //number of decimal places displayed 16 h_scale.set_valign (Gtk.Align.START); //horizontal alignment 17 18 var adjustment = new Gtk.Adjustment (42.0, 0.0, 100.0, 5.0, 10.0, 0.0); 19 v_scale = new Gtk.Scale (Gtk.Orientation.VERTICAL, adjustment); 20 v_scale.set_vexpand(true); 21 22 label = new Gtk.Label ("Move the scale handles..."); 23 24 var grid = new Gtk.Grid (); 25 grid.set_column_spacing (10); //amount of space between columns 26 grid.set_column_homogeneous (true); //all columns same width 27 grid.attach (h_scale, 0, 0, 1, 1); 28 grid.attach_next_to (v_scale, h_scale, Gtk.PositionType.RIGHT, 1, 1); 29 grid.attach (label, 0, 1, 2, 1); 30 31 h_scale.value_changed.connect (scale_moved); 32 v_scale.value_changed.connect (scale_moved); 33 34 window.add (grid); 35 window.show_all (); 36 } 37 38 /* Callback function for "value-changed" signal. 39 * The parameter refers to the scale which emitted the signal. 40 * Since we are accessing the values of not one, but two scales, 41 * we made the ranges instance variables, and ignore the 42 * parameter. 43 */ 44 void scale_moved (Gtk.Range range) { 45 label.set_text ("Horizontal scale is %.1f; vertical scale is %.1f.".printf (h_scale.get_value (), v_scale.get_value ())); 46 } 47} 48 49/* main creates and runs the application. */ 50public int main (string[] args) { 51 return new MyApplication ().run (args); 52} 53