Implement command handler

Overview

You implement behavior by implementing commands for ribbon buttons and shortcut keys. Commands are implemented by inheriting CommandHandlerBase.

• Command implementation can be implemented by overriding OnExecute.
  
• Whether a command can be executed can be implemented by overriding OnCanExecute. This result is linked with the enabled/disabled judgment of the ribbon button. Always true if not implemented.

In addition, App CurrentProject etc. can be accessed in the CommandHandlerBase class.

Implementation example

using NextDesign.Desktop;
using NextDesign.Desktop.ExtensionPoints;

namespace SampleExtension.Commands
{
    ///<summary>
    ///Implementation of the Hello command.
    ///</summary>
    public class HelloCommand : CommandHandlerBase
    {
        ///<summary>
        ///execute command
        ///</summary>
        ///<param name="c"></param>
        ///<param name="p"></param>
        protected override void OnExecute(ICommandContext c, ICommandParams p)
        {
            if (CurrentProject != null)
            {
                Output.WriteLine(ExtensionName, $"ProjectName : {CurrentProject.Name}");
            } else
            {
                Output.WriteLine(ExtensionName,$"Project is not opened");
            }

            //activate
            App.Window.IsInformationPaneVisible = true;
            App.Window.CurrentOutputCategory = ExtensionName;
            App.Window.ActiveInfoWindow = "Output";
        }

        ///<summary>
        ///Determining whether the command can be executed
        ///</summary>
        ///<returns>true if the command is valid</returns>
        protected override bool OnCanExecute()
        {
            return true;
        }
    }
}