/* Updater / ActionUpdater "kümmert" sich nur um die Aktualisierung der _
  Progressbar  */
	public class MyDataTableActionUpdater {
 
        	private MyDataTable table = null;
        	private Control ctl;
		private bool enableActions = false;
 
        	public MyDataTable GetDataTableSource {
        		get {
        			return this.table;
        		}
        	}
 
        	public void SetCount(int count) {
       	    		(this.ctl as ProgressBar).Maximum = count;
        	}
 
        	public void SetDataTableSource (MyDataTable table) {
        		this.table = table;
        	}
 
        	public void AddControl (Control control) {
        		this.ctl = control;
        	}
 
        	public MyDataTableActionUpdater() { }
 
		public bool EnableActions {
        		set {
        			this.enableActions = value;
        			if (value) {
        				this.DoEnableActions();
        			}else{
        				this.DoDisableActions();
        			}
        		}
        		get {
        			return this.enableActions;
        		}
		}
 
		private void DoDisableActions() {
			this.table.FillBegin -= new MyDataTable.FillBeginDelegate(FillBegin);
            		this.table.FillFinish -= new MyDataTable.FillFinishDelegate( _
              FillFinish);
            		this.table.FillIsRunning -= new MyDataTable.FillIsRunningDelegate( _
            FillIsRunning);
		}
 
		private void DoEnableActions() {
			this.table.FillBegin += new MyDataTable.FillBeginDelegate(FillBegin);
			this.table.FillFinish += new MyDataTable.FillFinishDelegate(FillFinish);
			this.table.FillIsRunning += new MyDataTable.FillIsRunningDelegate( _
  FillIsRunning);
		}
 
        	private void FillBegin(object sender, EventArgs e) {
           		this.ctl.Invoke(new MyDataTable.FillBeginDelegate( _
             UpdateFillBegin), new object[] { sender, e });
        	}
 
        	private void UpdateFillBegin(object sender, EventArgs e) {
        		this.Reset();
        	}
 
		private void FillIsRunning(object sender, MyDataTableEventArgs e) {
			this.ctl.Invoke(new MyDataTable.FillIsRunningDelegate(UpdateFillIsRunning), _
  new object[] { sender, e });
		}
 
		private void UpdateFillIsRunning(object sender, MyDataTableEventArgs e) {
			if ((e.CurrentSize % 2) == 0)
				Application.DoEvents();
			(this.ctl as ProgressBar).Value = e.CurrentSize;
		}
 
        	private void FillFinish(object sender, MyDataTableEventArgs e) { 
			this.ctl.Invoke(new MyDataTable.FillFinishDelegate(UpdateFillFinish), new _
  object[] { sender, e });
		}
 
		private void UpdateFillFinish(object sender, MyDataTableEventArgs e) {
			this.Reset();
		}
 
		private void Reset() {
			(this.ctl as ProgressBar).Value = 0;
		}
	};