Ticket #1862: slider-mplayer.vala

// compile with: valac --pkg gtk+-2.0 slider-mplayer.vala -o slider-mplayer
using Gtk;

public class SliderMplayer : Window {

    private Label l1;
    private Label l2;
    private HScale slider;
    private HScale slider2;
    private IOChannel chan;
    private size_t bw;

    public SliderMplayer (string[] args ) {
        Intl.setlocale(LocaleCategory.ALL,"C");
        var filename=args[1];
        if((filename=="") || (filename==null)) {
          var file_chooser = new FileChooserDialog ("Open File", null,
            FileChooserAction.OPEN,
            STOCK_CANCEL, ResponseType.CANCEL,
            STOCK_OPEN, ResponseType.ACCEPT);
          if (file_chooser.run () == ResponseType.ACCEPT) {
            filename=file_chooser.get_filename ();
          }
          file_chooser.destroy ();
        }
        try {
          Process.spawn_command_line_async("rm -f /tmp/mplayer_fifo");
          Process.spawn_command_line_async("mkfifo /tmp/mplayer_fifo");
          Process.spawn_command_line_async("mplayer -slave -quiet -input file=/tmp/mplayer_fifo %s ".printf(filename));
        } catch (SpawnError e) {
          stderr.printf ("%s\n", e.message);
        }
        try {
          chan= new IOChannel.file("/tmp/mplayer_fifo", "r+");
        } catch (FileError e) {
          stderr.printf ("%s\n", e.message);
        }
        this.title = "SliderMPlayer";
        this.position = WindowPosition.CENTER;
        set_default_size (300, 20);
        this.destroy.connect(Gtk.main_quit);

        l1= new Label.with_mnemonic("Position");
        l2= new Label.with_mnemonic("Scale");
        slider = new HScale.with_range (0, 100, 1);
        slider2 = new HScale.with_range (1, 10, 0.1);
        slider.adjustment.value=100;

        slider.adjustment.value_changed.connect (() => {
          chan.write_chars("sub_pos %d 1\n".printf((int)slider.adjustment.value).to_utf8(), out bw);
          chan.flush();
        });

        slider2.adjustment.value_changed.connect (() => {
          chan.write_chars("sub_scale %0.2f 1\n".printf(slider2.adjustment.value).to_utf8(), out bw);
          chan.flush();
        });

        var hbox = new HBox (true, 5);
        var hbox2 = new HBox (true, 5);
        var vbox = new VBox (true, 5);
        hbox.add (l1);
        hbox.add (slider);
        hbox2.add (l2);
        hbox2.add (slider2);
        vbox.add(hbox);
        vbox.add(hbox2);
        add (vbox);
    }

    public static int main (string[] args) {
        Gtk.init (ref args);
        var window = new SliderMplayer (args);
        window.show_all ();
        Gtk.main ();
        return 0;
    }
}