Using C#, how do I enable the user press the Escape button to stop a process from happening? Rhino student needs help!

eebs99 · March 4, 2016, 6:23am

I have an infinite while loop in my code drawing a random increasing curve. At any given time I want to press escape to stop the process, but when I use the GetString() function it stops the background process, at least until I press Enter again. I tried using Windows.Form, but that didn’t work. How can I accomplish my goal?

menno · March 4, 2016, 10:25am

There is an event in RhinoCommon called EscapePressed

You can find more info here http://4.rhino3d.com/5/rhinocommon/html/E_Rhino_RhinoApp_EscapeKeyPressed.htm

Generally, you can find info on RhinoCommon here http://4.rhino3d.com/5/rhinocommon/

eebs99 · March 4, 2016, 2:48pm

Are there any examples of code using this event? I’m not too familiar with
the event types in C# yet.

eebs99 · March 4, 2016, 3:16pm

Also, does it work similar to RhinoApp.KeyboardEventHandler?

dale · March 4, 2016, 4:37pm

https://github.com/dalefugier/SampleCsCommands/blob/master/SampleCsEscapeKey.cs

https://github.com/dalefugier/SampleCsCommands/blob/master/SampleCsEscapeKey2.cs

MatrixRatrix · December 14, 2018, 6:01pm

Hello @dale , this link dont work, can you post another?

thanks

jesterking · December 14, 2018, 6:32pm

github.com

mcneel/rhino-developer-samples/blob/6/rhinocommon/cs/SampleCsCommands/SampleCsEscapeKey.cs

using System;
using Rhino;
using Rhino.Commands;

namespace SampleCsCommands
{
  public class SampleCsEscapeKey : Command
  {
    private bool m_escape_key_pressed;

    public SampleCsEscapeKey()
    {
      m_escape_key_pressed = false;
    }

    public override string EnglishName
    {
      get { return "SampleCsEscapeKey"; }
    }

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github.com

mcneel/rhino-developer-samples/blob/6/rhinocommon/cs/SampleCsCommands/SampleCsEscapeKey2.cs

using System;
using Rhino;
using Rhino.Commands;

namespace SampleCsCommands
{
  /// <summary>
  /// Escape key event handler helper class
  /// </summary>
  class EscapeKeyEventHandler : IDisposable
  {
    private bool m_escape_key_pressed;

    public EscapeKeyEventHandler(string message)
    {
      RhinoApp.EscapeKeyPressed += RhinoApp_EscapeKeyPressed;
      RhinoApp.WriteLine(message);
    }

    public bool EscapeKeyPressed

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Using C#, how do I enable the user press the Escape button to stop a process from happening? Rhino student needs help!

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