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Lock Method

Summary

Locks the object(s) currently being edited (selected).

Syntax
C#
VB
Java
Objective-C
C++
public virtual void Lock() 
Public Overridable Sub Lock()  
-(void) lock; 
public void lock() 
public:  
   virtual void Lock() 

Remarks

Use the CanLock property to determine whether you can currently call this method.

For more information, refer to Implementing Annotation Security.

Example

This example will show how to lock and unlock an object, prompting the user for a password.

C#
using Leadtools.Annotations.Automation; 
using LeadtoolsExamples.Common; 
using Leadtools.Annotations.Engine; 
using Leadtools.Codecs; 
using Leadtools.Controls; 
using Leadtools.Annotations.Rendering; 
using Leadtools.Annotations.WinForms; 
 
public void AnnAutomation_Lock() 
{ 
   // first add a new object to the automation 
   AnnRectangleObject rectObj = new AnnRectangleObject(); 
   rectObj.Rect = LeadRectD.Create(100, 100, 800, 800); 
   rectObj.Stroke = AnnStroke.Create(AnnSolidColorBrush.Create("Blue"), LeadLengthD.Create(1)); 
   rectObj.Fill = AnnSolidColorBrush.Create("Yellow"); 
   _automation.Container.Children.Add(rectObj); 
 
   _automation.Invalidate(LeadRectD.Empty); 
 
   // make sure no objects are selected in the automation 
   _automation.SelectObject(null); 
 
   // Hook to the lock and unlock events 
   _automation.LockObject += _automation_LockObject; 
   _automation.UnlockObject += _automation_UnlockObject; 
 
   // see if we can lock or unlock the object (this should show a message informing you that no objects are currently selected (bring edited) 
   LockUnlock(_automation); 
 
   // select (edit) the object we have just added 
   _automation.SelectObject(rectObj); 
 
   // see if we can lock or unlock the object (should show the password dialog to lock the object) 
   LockUnlock(_automation); 
 
   _automation.LockObject -= _automation_LockObject; 
   _automation.UnlockObject -= _automation_UnlockObject; 
} 
 
private void LockUnlock(AnnAutomation automation) 
{ 
   // first, check if we can lock the object 
   if (automation.CanLock) 
   { 
      // lock this object 
      automation.Lock(); 
   } 
   else if (automation.CanUnlock) 
   { 
      // unlock this object 
      automation.Unlock(); 
   } 
   else 
   { 
      Debug.WriteLine("Cannot lock or unlock because no object is currently being edited (selected)"); 
   } 
} 
 
void _automation_LockObject(object sender, AnnLockObjectEventArgs e) 
{ 
   Debug.WriteLine(string.Format("Lock it, sending password = {0}", "secret")); 
   e.Password = "secret"; 
} 
 
void _automation_UnlockObject(object sender, AnnLockObjectEventArgs e) 
{ 
   Debug.WriteLine(string.Format("Unlock it, sending password = {0}", "secret")); 
   e.Password = "secret"; 
} 

Requirements

Target Platforms

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Leadtools.Annotations.Automation Assembly