UXDocumentViewer is a feature-rich user interface control for displaying documents in high-fidelity resolution with WYSIWYG layout. UXDocumentViewer facilitates users with sophisticated viewing experiences, allowing them to easily view, zoom, search and navigate throughout the pages in the document.

In addition, users can also print the document in the same way and manner as the document is rendered. Text selection is supported as well, allowing users to select a range of text and copy them to clipboard for latter use. One of the key features of the UXDocumentViewer is its capability to handle large document without performance bottleneck, thanks to the state-of-the-art architecture and solid virtualization implementation.

Using UXDocumentViewer

You use UXDocumentViewer to view a document, which you can set through the provided Source property, or specify the document as the content of UXDocumentViewer. The UXDocumentViewer control renders the document in WYSIWYG (What-you-see-is-what-you-get) manner. To achieve pixel-perfect layout rendering, UXDocumentViewer requires the document to be of FixedDocument type.

A FixedDocument contains one or more pages which is defined in the Pages property. Each page is represented by a FixedPage type. Both FixedDocument and FixedPage are part of the ClientUI document framework, which allow developers to create rich document content that can be viewed consistently in both Silverlight and WPF application. For more information about ClientUI document framework, see Document Framework Overview

The following example shows how to define a FixedDocument with two pages and display the document in UXDocumentViewer.

<Intersoft:UXDocumentViewer Width="800" Height="600">
    <Intersoft:FixedDocument PageSize="1280,720">
        <Intersoft:PageContent>
            <Intersoft:FixedPage Width="1280" Height="720">
                <Canvas>
                    <TextBlock Text="Page 1 content" FontSize="64"  
                                Canvas.Left="25" Canvas.Top="25"/>
                </Canvas>
            </Intersoft:FixedPage>
        </Intersoft:PageContent>
        <Intersoft:PageContent>
            <Intersoft:FixedPage Width="1280" Height="720">
                <Canvas>
                    <TextBlock Text="Page 2 content" FontSize="64" 
                                Canvas.Left="25" Canvas.Top="25"/>
                </Canvas>
            </Intersoft:FixedPage>
        </Intersoft:PageContent>
    </Intersoft:FixedDocument>
</Intersoft:UXDocumentViewer>

Understanding UXDocumentViewer Elements

UXDocumentViewer facilitates users with the capability to view, search, and navigate a document. To achieve these capabilities, UXDocumentViewer comes with rich user interface elements that consisted of UXVirtualizingListBox, UXSearchBox, UXToolBar and UXStatusBar.

The following figure illustrates the main layout and user interface elements of the UXDocumentViewer control.

Although the UXDocumentViewer already provides predefined UI elements to allow rich user interaction, you are free to customize any of the elements to suit your application's preferences – thanks to the loosely-coupled architeture design that made the customization possible. You can customize the styles and appearance of the elements entirely by editing the control template using designer tools such as Expression Blend. To learn more about the commands used in the predefined UI elements, see the UXDocumentViewer Commands section later in this topic.

Configuring Navigation Pane

By default, UXDocumentViewer displays the navigation pane allowing users to quickly browse through the pages' thumbnails. You can set the navigation pane to collapse initially by setting the IsNavigationPaneExpanded property to false. Users can still expand the navigation pane at runtime by toggling the Expand/Collapse command in the toolbar.

If the navigation pane is not applicable, you can collapse it entirely by setting the NavigationPaneVisibility to Collapsed. With this settiing, both the navigation pane and the command button will be hidden.

Customizing Scrolling Latency

The navigation pane contains an items container that is filled with a list of thumbnails that represent the document's pages. Clicking on the thumbnail allows you to quickly navigate to the selected page.

To improve the overall performance and minimize resources consumption, the navigation pane renders only the thumbnails visible in the viewport. A ScrollLatency property is provided to determine the timespan to wait for the next rendering after each scrolling. By default, the ScrollLatency property value is set to 0.33 seconds.

Customizing Scrolling Step

UXDocumentViewer comes with default viewing configuration that works best for users. One of the remarkable features is the automatic calculation to determine the scrolling step for both the horizontal and vertical scroll bar. By default, the scrolling step is determined at runtime by dividing the document's actual size by 8. However, if the automatic scrolling step is not desired, you can customize the behavior by setting the HorizontalScrollStep and VerticalScrollStep properties.

The following example shows how to customize the scrolling steps for both the horizontal and vertical scroll bar.

<Intersoft:UXDocumentViewer HorizontalScrollStep="12" VerticalScrollStep="24" />

Customizing Text Selection Appearance

UXDocumentViewer supports text highlighting for Glyphs and TextBlock element. The highlighting is applied on both text selection and search results found on the document. You can customize the selection brushes through the provided properties.

The properties and the default values are listed in the table below.

The following example shows how to customize the selection brushes in UXDocumentViewer.

<Intersoft:UXDocumentViewer HighlightSelectionBrush="#64006CC0" HighlightSearchBrush="#4CFAFF00" 
                            HighlightSelectedSearchBrush="#4C0074FF"/>

Customising Custom Content Template

UXDocumentViewer also supports adding a layer of custom content positioned on the top of each page in the document. In order to customize the custom content, you will need to provide a DataTemplate object as a value in the CustomContentTemplate property.

The following example shows how to set the custom content template, overlaying Intersoft Solution text on the top of page content, in a UXDocumentViewer.

<Intersoft:UXDocumentViewer>
    <Intersoft:UXDocumentViewer.CustomContentTemplate>
        <DataTemplate>
            <Grid Width="816" Height="1056" Opacity="0.15">
                <Grid VerticalAlignment="Stretch" HorizontalAlignment="Stretch" >
                    <Grid.RenderTransform>
                        <RotateTransform Angle="-45" CenterX="408" CenterY="528" />
                    </Grid.RenderTransform>
                    <TextBlock Text="Intersoft Solutions" VerticalAlignment="Center" 
                        HorizontalAlignment="Center" FontSize="84" Foreground="Red"/>
                </Grid>
            </Grid>
        </DataTemplate>
    </Intersoft:UXDocumentViewer.CustomContentTemplate>
    ...
</Intersoft:UXDocumentViewer>

The results of the custom content template is shown below.

Customizing Zoom Mode

UXDocumentViewer features rich viewing capabilities that are comparable to the industry's popular viewers such as Adobe Reader, including various zoom presets and custom zoom ratio. UXDocumentViewer provides 4 zoom mode which can be customized through the ZoomMode property.

The following list describes the supported zoom mode.

• ActualSize
  Sets the zoom mode to the original aspect ratio which display the actual size of the document.
   
• FitToWidth
  Automatically maintain the zoom ratio and arrange the document's width to fit the page canvas. This mode eliminates the need of horizontal scrollbar which significantly improves reading experience.
   
• FitToHeight
  Automatically maintain the zoom ratio and arrange the document's height to fit the page canvas. This mode ensures the entire page to be visible in the canvas which is ideal for quick browsing or print preview.
   
• Custom
  Sets the zoom mode to a custom, user-defined value. You can predefine the custom zoom value through the ZoomLevel property.

You can also configure the UXDocumentViewer to display in full screen initially by setting the IsFullScreen property to true. Users can toggle the full screen mode at runtime through the full screen command button in the tool bar.

The following illustration compares the various zoom mode supported in UXDocumentViewer.

Localizing UXDocumentViewer

UXDocumentViewer provides full localization support for the textual content used in the user interface elements. The following table lists the localizable string resources.

UXDocumentViewer Toolbar

UXDocumentViewer provides comprehensive commands for rich viewing experiences. Many of the essential commands are presented as command buttons in the toolbar and status bar section of the control. The complete elements can be seen in the section above.

The following table lists the commands presented in the toolbar section of the UXDocumentViewer control.

Page Navigation
	Displays the current page shown in the content section and the total page count of the document. You can enter a page number to directly jump to the specific page.
	Scroll to the previous page in the document.
	Scroll to the next page in the document.
	Show or hide the thumbnails section.
Page Zooming
	Sets the zoom mode to show the actual size of the document.
	Sets the zoom mode to fit the width of the document.
	Sets the zoom mode to fit the height of the document.
	Magnify the document size by a preset ratio.
Search
	The TextBox element to enter search criteria.
Others
	Toggle the UXDocumentViewer control to fill the screen.
	Print the document using print file dialog.
	Copy the highlighted text.

UXDocumentViewer Commands

UXDocumentViewer is built around the commanding semantics which allows the document interaction to be executed through declarative definition in the XAML markup. The commanding semantics is also an ideal approach for MVVM pattern development.

UXDocumentViewer includes predefined commands to interact with the document which are described in the following table.