# LeftButtonPressEvent to vtkButtonWidget
**URL:** https://discourse.vtk.org/t/leftbuttonpressevent-to-vtkbuttonwidget/4607
**Category:** Development
**Created:** [November 9, 2020, 8:06am UTC](https://discourse.vtk.org/t/leftbuttonpressevent-to-vtkbuttonwidget/4607 "2020-11-09T08:06:46Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@learn\_forever](https://discourse.vtk.org/u/learn_forever)
#### Post date: [November 9, 2020, 8:06am UTC](https://discourse.vtk.org/t/leftbuttonpressevent-to-vtkbuttonwidget/4607/1 "2020-11-09T08:06:46Z")
Hi Experts,
I added a left-button press event handler for the button widget, code like below.
vtkButtonWidget buttonWidget = vtkButtonWidget.New();
buttonWidget.SetInteractor(this.GetInteractor());
buttonWidget.SetRepresentation(buttonRepresentation);
buttonWidget.LeftButtonPressEvt += ButtonWidget\_LeftButtonPressEvt;
Unfortunately, this events never got triggered.
I dig into the VTK source code and found the LeftButtonPressEvent was translated to the widget event. See codes below. So, my question is: If I still want to listen to the LeftButtonPressEvent, I need to re-write the widget callback mapper? Are ther any other good solutions or suggestions? Thanks a lot.
vtkButtonWidget::vtkButtonWidget()
{
// Set the initial state
this-\>WidgetState = vtkButtonWidget::Start;
// Okay, define the events
this-\>CallbackMapper-\>SetCallbackMethod(vtkCommand::LeftButtonPressEvent,
vtkWidgetEvent::Select,
this, vtkButtonWidget::SelectAction);
…
}
---
### Author:  [@mortifiedpenguin](https://discourse.vtk.org/u/mortifiedpenguin)
#### Post date: [March 4, 2024, 9:27am UTC](https://discourse.vtk.org/t/leftbuttonpressevent-to-vtkbuttonwidget/4607/2 "2024-03-04T09:27:16Z")
Hi, I’m encountering the same problem, did you find a solution or workaround for it?