AnnLoadPictureEventArgs Class

Summary

Event data for the AnnRenderingEngine.LoadPicture event.

Syntax

Objective-C

C++/CLI

Java

Python

public class AnnLoadPictureEventArgs : EventArgs

@interface LTAnnLoadPictureEventArgs : NSObject

public class AnnLoadPictureEvent extends LeadEvent

public: 
   ref class AnnLoadPictureEventArgs : EventArgs

class AnnLoadPictureEventArgs(EventArgs):

Remarks

The members of this class are populated as follows when the AnnRenderingEngine.LoadPicture event occurs:

Member	Description
Picture	The loaded picture object. The value of AnnPicture.Source is the URL of the image that just finished loading.
AnnObject	The owner AnnObject object
Container	The owner container
Error	Contains null if the image was loaded successfully; otherwise, this field will contain any error information.

Example

using Leadtools.Annotations.Automation; 
using Leadtools.Annotations.Engine; 
using Leadtools.Annotations.Rendering; 
using Leadtools.Codecs; 
using Leadtools.Annotations; 
using Leadtools.WinForms; 
 
public void AnnRenderingEngine_LoadPicture() 
{ 
   // get the current rendering engine 
   AnnRenderingEngine renderingEngine = _automation.AutomationControl.RenderingEngine; 
 
   // Change the default loading object placeholder to be a green border with semi-transparent background 
   AnnStroke stroke = AnnStroke.Create(AnnSolidColorBrush.Create("Green"), LeadLengthD.Create(1)); 
   AnnBrush fill = AnnSolidColorBrush.Create("rgba(0, 0, 0, 0.5)"); 
 
   renderingEngine.LoadingPictureStroke = stroke; 
   renderingEngine.LoadingPictureFill = fill; 
 
   // Hook to the LoadPicture event 
   renderingEngine.LoadPicture += renderingEngine_LoadPicture; 
 
   // Create a new AnnHotspotObject with a picture from a remote server 
   double inch = 720; 
   AnnHotspotObject hotspot = new AnnHotspotObject(); 
   // Add the object at location 1,1 inch with size 4,2 inches 
   hotspot.Rect = LeadRectD.Create(1 * inch, 1 * inch, 4 * inch, 2 * inch); 
   // Set its picture 
   AnnPicture picture = new AnnPicture("ms-appx:///Assets/Logo.png"); 
   hotspot.Picture = picture; 
 
   // Add it to the container 
   AnnContainer container = _automation.Container; 
   container.Children.Add(hotspot); 
 
   _automation.Invalidate(LeadRectD.Empty); 
} 
 
void renderingEngine_LoadPicture(object sender, AnnLoadPictureEventArgs e) 
{ 
   // Check if an error occurred 
   if (e.Error != null) 
   { 
      // Show info about the error 
      string str = e.Error.Message; 
      str += "\nSource: " + e.Picture.Source; 
      str += "\nOwner object: " + e.AnnObject.FriendlyName; 
      Debug.WriteLine(str); 
   } 
}

Requirements

Target Platforms

Reference

AnnLoadPictureEventArgs Members

Leadtools.Annotations.Engine Namespace

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Help Version 23.0.2024.2.29

Leadtools.Annotations.Engine Assembly

Introduction

Getting Started

Namespaces

Leadtools.Annotations.Engine Namespace

Assemblies