Draw Event

C#
WinRT C#
Objective-C
Java
WinRT JavaScript

public event EventHandler<AnnDrawDesignerEventArgs> Draw

public event EventHandler<AnnDrawDesignerEventArgs> Draw

-(void) automation:(LTAnnAutomation*) automation 
      drawWithArgs:(LTAnnDrawDesignerEventArgs*) e;

public void addDrawDesignerdListener(AnnDrawDesignerListener listener)
public void removeDrawDesignerListener(AnnDrawDesignerListener listener)

add_Draw(function(sender, e))
remove_Draw(function(sender, e))

The event handler receives an argument of type AnnDrawDesignerEventArgs containing data related to this event. The following AnnDrawDesignerEventArgs properties provide information specific to this event.

Property	Description
Cancel
Object
OperationStatus

When an object is being drawn, the automation object will hook the object draw designer's AnnDrawDesigner.Draw to this event. Therefore, instead of hooking and unhooking to the various designers draw events, you can simply subscribe to this event once.

C#
Visual Basic
WinRT C#
WinRT JavaScript
Silverlight C#
Silverlight VB

Copy Code

using Leadtools.Annotations.Automation;
using Leadtools.Annotations.Core;
using Leadtools.Codecs;
using Leadtools.WinForms;

public void AnnAutomation_Draw()
{
   // Hook to the automation's Draw event
   _automation.Draw += _automation_Draw;
}
void _automation_Draw(object sender, AnnDrawDesignerEventArgs e)
{
   // Check if we are drawing a line and we just started, if so, cancel it
   if (_automation.Manager.CurrentObjectId == AnnObject.LineObjectId &&
      e.OperationStatus == AnnDesignerOperationStatus.Start)
   {
      Debug.WriteLine("Canceling line...");
      e.Cancel = true;
   }
}

using Leadtools.Annotations.Automation;
using Leadtools.Controls;
using Leadtools.Converters;
using Leadtools.Annotations.Core;
using Leadtools.Codecs;

[TestMethod]
public void AnnAutomation_Draw()
{
   // Hook to the automation's Draw event
   _automation.Draw += _automation_Draw;
}
void _automation_Draw(object sender, AnnDrawDesignerEventArgs e)
{
   // Check if we are drawing a line and we just started, if so, cancel it
   if (_automation.Manager.CurrentObjectId == AnnObject.LineObjectId &&
      e.OperationStatus == AnnDesignerOperationStatus.Start)
   {
      Debug.WriteLine("Canceling line...");
      e.Cancel = true;
   }
}

Target Platforms

Reference

AnnAutomation Class
AnnAutomation Members