ManipulationStarting Event

Occurs when the manipulation processor is first created.

Namespace: C1.Win.TouchToolKit

Assembly: C1.Win.TouchToolKit.4.8.dll

Syntax

public event EventHandler<ZoomManipulationStartingEventArgs> ManipulationStarting

Public Event ManipulationStarting As EventHandler(Of ZoomManipulationStartingEventArgs)

Returns

Type	Description
EventHandler<ZoomManipulationStartingEventArgs>	Occurs when the manipulation processor is first created.

Remarks

This event is a routed event. The C1Zoom must have a ManipulationModes other than None to be a manipulation event source.

Examples

The following code example shows how to use this event.

This code example is part of a larger example provided for the ZoomFactorChanged event.

public class GcZoomEventDemo : Form
{
	private GcZoom _gcZoom1 = new GcZoom();

	public GcZoomEventDemo()
	{
		_gcZoom1.Target = this;
		_gcZoom1.AutoShowControl = true;
		_gcZoom1.ManipulationStarting += _gcZoom1_ManipulationStarting;
	}

	void _gcZoom1_ManipulationStarting(object sender, ZoomManipulationStartingEventArgs e)
	{
		Console.WriteLine(e.TargetControl.ToString());
		Console.WriteLine(e.Position.ToString());

		if (e.TargetControl is TextBox)
		{
			// Pan gesture send to child control, Zoom gesture send to Form
			e.Mode = ZoomManipulationModes.Zoom;
		}
		else if (e.TargetControl is Button)
		{
			// Zoom gesture send to child control, Pan gesture send to Form
			e.Mode = ZoomManipulationModes.Pan;
		}
		else
		{
			// Pan and Zoom gesture send to Form
			e.Mode = ZoomManipulationModes.All;
		}
	}
}

Public Class GcZoomEventDemo
	Inherits Form
	Private _gcZoom1 As New GcZoom()

	Public Sub New()
		_gcZoom1.Target = Me
		_gcZoom1.AutoShowControl = True
		AddHandler _gcZoom1.ManipulationStarting, AddressOf _gcZoom1_ManipulationStarting
	End Sub

	Private Sub _gcZoom1_ManipulationStarting(sender As Object, e As ZoomManipulationStartingEventArgs)
		Console.WriteLine(e.TargetControl.ToString())
		Console.WriteLine(e.Position.ToString())

		If TypeOf e.TargetControl Is TextBox Then
			' Pan gesture send to child control, Zoom gesture send to Form
			e.Mode = ZoomManipulationModes.Zoom
		ElseIf TypeOf e.TargetControl Is Button Then
			' Zoom gesture send to child control, Pan gesture send to Form
			e.Mode = ZoomManipulationModes.Pan
		Else
			' Pan and Zoom gesture send to Form
			e.Mode = ZoomManipulationModes.All
		End If
	End Sub
End Class