DocumentViewOptions Class

Summary

Optional initial view options to use when a document is set in a document viewer.

Syntax

C++

[SerializableAttribute()] 
[DataContractAttribute()] 
public class DocumentViewOptions

<SerializableAttribute(),  
 DataContractAttribute()>  
Public Class DocumentViewOptions

public: 
   [SerializableAttribute,  
   DataContractAttribute] 
   ref class DocumentViewOptions

Remarks

DocumentViewOptions can be used to set optional initial view options when a document is set in a DocumentViewer.

Documents are set in the viewer using DocumentViewer.SetDocument. During this call, the viewer will check the value of LEADDocument.ViewOptions, and if it contains a valid value (not null) the viewer will try to set up the view initially as indicated by the options in the class as follows:

Member	Action
PageNumber	If this value is not 0 or 1, the document viewer will try to set the current page number using DocumentViewer.GotoPage.
ViewLayout	Runs the corresponding `Layout.*` command.
AnnotationsUserMode	Runs the corresponding `Annotations.UserMode*` command.
ViewZoomPercent	Runs the `View.ZoomPercentage` command with the specified percentage.
ViewScrollOffset	Scrolls the view by the specified amount.
ViewSizeMode	Runs the corresponding `View.ActualSize`, `View.FitWidth` or `View.FitPage` command.
ViewItemType	Runs the `View.ItemType` with the specified mode.
LoadAnnotations	If true, creates the annotation UI elements and tries to load the annotations stored in the document. If false, the annotation UI elements in the viewer are disabled and hidden.
LoadThumbnails	If true, creates the thumbnail UI elements and tries to load the thumbnails of the pages of the document. If false, the thumbnails UI elements in the viewer are disabled and hidden.
LoadBookmarks	If true, creates the bookmark UI elements and tries to load the bookmarks stored in the document. If false, the bookmark UI elements in the viewer are disabled and hidden.
ViewCommands	Additional user-defined document viewer commands to run.

Refer to Document Viewer Commands for more information on the commands.

In all the operations described above, the document viewer will perform sanity checks on the values before performing the action. For instance, if PageNumber is set to 5 but the document contains only 4 pages, then DocumentViewer.GotoPage is not called and the default page number (1) is viewed instead.

Setting view options in a document can be performed programmatically or interactively using the document viewer demo.

To create or update the view options programmatically on a LEADDocument:

Create an instance of DocumentViewOptions
Update the values of the class as desired. For instance, set PageNumber to 2 to automatically go to the second page when this document is viewed.
Set the instance into the LEADDocument.ViewOptions property.
Call LEADDocument.SaveToCache to save the document into the cache using these view options.

Now, when this document is loaded into a DocumentViewer using SetDocument, the view options are parsed and the commands are performed.

To create or update the view options interactively using the document viewer demos:

Load a LEADDocument into the viewer using any of the load menu options.
Interact with the UI to set the desired view. For instance, go to the second page or update the view layout or zoom value.
Perform "File/Save current view" menu option. This will collect the current view options using DocumentViewer.GetCurrentViewOptions and return a new instance of DocumentViewOptions. The options are set in LEADDocument.ViewOptions, and LEADDocument.SaveToCache is called.

Now, when this document is loaded into a DocumentViewer using SetDocument, the view options are parsed and the commands are performed.

Requirements

Target Platforms

Reference

DocumentViewOptions Members

Leadtools.Document Namespace

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Help Version 20.0.2020.4.3

Leadtools.Document Assembly

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