topic Re: cannot find OnClick() method in Tool in Developers Questions

cannot find OnClick() method in Tool

MariaMaldini — Tue, 20 Jan 2015 17:35:15 GMT

I am developing a Tool using Add-Ins in order to get the coordinate where user clicks on map ( through OnMouseDown event), but I want to do some operations before getting coordinates in another method. I try to explain my problem with a simple example. for example, I want to see a message box that will be called from a method ( msg method) and then user click on map and get coordinates using OnMouseDown event. my problem is that the first time that i click on tool's icon i see a message box (" hello") but the second time that i click on tool's icon, it does not show message box and tool just call OnMouseDown event.

( as i told, i do not want to have message box in OnMouseDown event)

please help, thanks in advance

using System;

using System.Collections.Generic;

using System.Text;

using System.IO;

using System.Windows.Forms;

namespace msg

{

public class msg : ESRI.ArcGIS.Desktop.AddIns.Tool

{

public msg()

{

MessageBox.Show("hello");

}

protected override void OnMouseDown(MouseEventArgs arg)

{

//get map coordinate

}

protected override void OnUpdate()

{

Enabled = ArcMap.Application != null;

}

Re: cannot find OnClick() method in Tool

MariaMaldini — Tue, 20 Jan 2015 17:38:20 GMT

is there any OnClick event or other way that i can call my message box every time that i click on tool's icon?

Re: cannot find OnClick() method in Tool

MahtabAlam1 — Tue, 20 Jan 2015 17:58:42 GMT

You are calling show message in tool's constructor and it will show only once. You might want to look at OnActivate method/event.

Re: cannot find OnClick() method in Tool

MariaMaldini — Tue, 20 Jan 2015 20:48:12 GMT

thanks for your quick responses. i am using c# so i converted the mentioned code to c#. but still i have the previous problem. is there any mistake to convert codes?

namespace msg

{

public class msg : ESRI.ArcGIS.Desktop.AddIns.Tool

{

public msg()

{

}

protected override void OnActivate()

{

base.OnActivate();

MessageBox.Show("hello");

}

protected override bool OnDeactivate()

{

bool functionReturnValue = false;

functionReturnValue = true;

this.Enabled = false;

return functionReturnValue;

}

protected override void OnMouseDown(MouseEventArgs arg)

{

//get map coordinate

}

protected override void OnUpdate()

{

Enabled = ArcMap.Application != null;

}

Re: cannot find OnClick() method in Tool

MariaMaldini — Wed, 21 Jan 2015 15:28:08 GMT

i changed the codes as following lines but i had the mentioned problem. i could not find any material about the way OnActivate and OnDeactivate methods work. is there anyone who can help me?

protected override void OnActivate()

{

base.OnActivate();

MessageBox.Show("hello");

}

protected override bool OnDeactivate()

{

return base.OnDeactivate();

}

Re: cannot find OnClick() method in Tool

MahtabAlam1 — Sun, 12 Dec 2021 03:28:06 GMT

OnActivate will be called when you activate the tool. But if you already have your tool active it won't do anything. So you need to set current tool as null once you are done with your logic. Something like this:

protected override void OnMouseDown(MouseEventArgs arg)
{
  try
  {
       //get map coordinate
  }
  catch(ex)
  {
       //handle exception
  }
  finally
  {
       ArcMap.Application.CurrentTool = null;
  }
}

Hope that it gives you what you want.

Re: cannot find OnClick() method in Tool

MariaMaldini — Fri, 23 Jan 2015 21:07:44 GMT

Really thanks, "finally { }" part solved my problem. Thanks a lot