Synchronous ProgressBar (v9)

In Eyeshot 9 ProgressBar can be used only in asynchronous WorkUnits (the ones ran with viewportLayout.StartWork()).

In case you would like to use ProgressBar in a synchronous way, independently from WorkUnits, updating its value when needed and then calling Invalidate(), you can use this trick:

Derive ProgressBar class and expose its Draw method:

public class MyProgressBar : devDept.Eyeshot.ProgressBar
{
	public MyProgressBar()
	{
		Visible = false;
	}

	public void Draw(ViewportLayout.DrawSceneParams myParams)
	{
		base.Draw(myParams);
	}
}

Derive the ViewportLayout and draw the custom progress bar in DrawOverlay method:

internal class MyViewportLayout : devDept.Eyeshot.ViewportLayout
{
	public MyProgressBar myProgr = new MyProgressBar();

	protected override void DrawOverlay(DrawSceneParams data)
	{
		base.DrawOverlay(data);

		if (myProgr.Visible)
		{
			data.Viewport = Viewports[ActiveViewport];
			myProgr.Draw(data);
		}
	}
}

Create the viewportLayout1 control as an instance of the MyViewportLayout class:

this.viewportLayout1 = new MyViewportLayout();

Somewhere in your code enable/disable the custom ProgressBar and update its value:

var myProgr = ((MyViewportLayout) viewportLayout1).myProgr;

if (!myProgr.Visible)
{
	myProgr.Text = "Processing...";
	myProgr.Visible = true;
	myProgr.Value = 0;
}
else if (myProgr.Value == 100)
{
	myProgr.Value = 0;
	myProgr.Visible = false;
}

if (myProgr.Visible)
	myProgr.Value += 10;

viewportLayout1.Invalidate();