jackpanel/Jackpanel.vala

   1 using Gtk;
   2 using Gdk;
   3 using Prolooks;
   4
   5 namespace Jackpanel {
   6
   7 public class Display : DisplayBase {
   8     private string _time;
   9     public  string time { get { return _time; } set { _time = value; queue_draw (); } }
  10
  11     private int inner_height;
  12
  13     Display () {
  14         width  = 182;
  15         height = 49;
  16         inner_height = height - 13;
  17         _time = "00:00:00";
  18         set_size_request (width, height);
  19     }
  20
  21     protected override bool draw_contents (Cairo.Context cr, Gdk.EventExpose event) {
  22         double x    = 32;
  23         double y    = 16;
  24         text(cr, _time, x, y, 16);
  25         Cairo.TextExtents ext = Cairo.TextExtents();
  26         cr.text_extents (_time, ref ext);
  27
  28         Color line_color;
  29         Color.parse (text_color_default, out line_color);
  30         set_source_from_color (cr, line_color, 0.5);
  31
  32
  33         cr.move_to (x, y + ext.y_bearing);
  34         cr.rel_line_to (0, ext.height);
  35         cr.stroke();
  36
  37         cr.move_to (x + ext.x_advance + ext.x_bearing, y + ext.y_bearing);
  38         cr.rel_line_to (0, ext.height);
  39         cr.stroke();
  40
  41
  42         cr.move_to (3, inner_height - 13);
  43         cr.rel_line_to (width - 20, 0);
  44         cr.stroke();
  45         return false;
  46     }
  47 }
  48
  49 Jackpanel panel;
  50
  51 jack_client_t *client;
  52 jack_status_t status;
  53 jack_transport_state_t transport_state;
  54 jack_transport_state_t previous_transport_state;
  55
  56 public static int process (uint32 nframes, void *arg)
  57 {
  58
  59     transport_state = jack_transport_query(client, null);
  60     if (transport_state != previous_transport_state) {
  61     if (transport_state == jack_transport_state_t.JackTransportRolling) {
  62         stdout.printf ("transport started\n");
  63     } else if (transport_state == jack_transport_state_t.JackTransportStopped) {
  64         stdout.printf ("transport stopped\n");
  65     }
  66
  67     previous_transport_state = transport_state;
  68     }
  69
  70
  71     return 0;
  72 }
  73
  74 public static void initialize_jack (string client_name) {
  75         client = jack_client_open (client_name, jack_options_t.JackNullOption, ref status);
  76         if (client == null) {
  77                     stderr.printf ("jack_client_open() failed, status = 0x%2.0x\n", status);
  78                     if ((status & jack_status_t.JackServerFailed) != 0) {
  79                             stderr.printf ("Unable to connect to JACK server\n");
  80                     }
  81         }
  82
  83             if ((status & jack_status_t.JackServerStarted) != 0) {
  84                     stderr.printf ("JACK server started\n");
  85             }
  86             if ((status & jack_status_t.JackNameNotUnique) != 0) {
  87                     client_name = jack_get_client_name(client);
  88                     stderr.printf ("unique name `%s' assigned\n", client_name);
  89             }
  90
  91         jack_set_process_callback (client, (JackProcessCallback)process, null);
  92
  93             if (jack_activate (client) != 0) {
  94                     stderr.printf ("cannot activate client");
  95             }
  96 }
  97
  98 public class Jackpanel : Alignment {
  99     Jackpanel () {
 100         var table            = new Table (5, 2, false);
 101         var display          = new Display ();
 102         var to_start         = new TransportButton (TransportButton.IconType.TO_START);
 103                 to_start.height      = 20;
 104                 to_start.width       = 31;
 105
 106         var fast_backward    = new TransportButton (TransportButton.IconType.FAST_BACKWARD);
 107                 fast_backward.height = 20;
 108                 fast_backward.width  = 31;
 109
 110         var play             = new TransportButton (TransportButton.IconType.PLAY);
 111                 play.height          = 20;
 112                 play.width           = 31;
 113
 114         var stop             = new TransportButton (TransportButton.IconType.STOP);
 115                 stop.height          = 20;
 116                 stop.width           = 31;
 117
 118         var fast_forward     = new TransportButton (TransportButton.IconType.FAST_FORWARD);
 119                 fast_forward.height  = 20;
 120                 fast_forward.width   = 31;
 121
 122         table.attach_defaults (display, 0, 5, 0, 1);
 123
 124         table.attach_defaults (to_start,      0, 1, 1, 2);
 125         table.attach_defaults (fast_backward, 1, 2, 1, 2);
 126         table.attach_defaults (fast_forward,  2, 3, 1, 2);
 127         table.attach_defaults (stop,          3, 4, 1, 2);
 128         table.attach_defaults (play,          4, 5, 1, 2);
 129
 130         table.set_col_spacing (0, 4);
 131         table.set_col_spacing (1, 4);
 132         table.set_col_spacing (2, 10);
 133         table.set_col_spacing (3, 4);
 134
 135         add (table);
 136     }
 137
 138     static int main (string[] args) {
 139         Gtk.init (ref args);
 140         var window = new Gtk.Window (Gtk.WindowType.TOPLEVEL);
 141         panel  = new Jackpanel ();
 142         initialize_jack (Path.get_basename(args[0]));
 143         window.add (panel);
 144         window.destroy += Gtk.main_quit;
 145         window.show_all ();
 146         Gtk.main ();
 147         return 0;
 148     }
 149 }
 150
 151 } //namespace Jackpanel
 152