!7

sclass Backtick extends DynPrintLog {
  S cmd;
  transient JButton btnGo;
  
  JComponent visualize() {
    ret northAndCenter(
      centerAndEastWithMargins(
        withLabel("Command:", onEnter(jLiveValueTextField_bothWays(dm_fieldLiveValue('cmd)), r go)),
          btnGo = jbutton("Go", r go)),
      super.visualize());
  }
  
  void go() ctex {
    temp enter();
    temp tempDisableButton(btnGo);
    clearPrintLog();
    S cmd = this.cmd;
    print("Running command: " + cmd + "\n");
    OutputStream stream1 = printOutputStreamWithIndent("  ");
    OutputStream stream2 = printOutputStreamWithIndent("  ");
    int exitValue = apacheCommonsExec_backtickToStreams(cmd, stream1, stream2);
      
    // print empty lines & flush stdout & stderr
    stream1.write(toUtf8("\n"));
    stream2.write(toUtf8("\n"));
    
    print("Exit value: " + exitValue);
  }
}