874875 How to scroll PDF pages in WPF PDFViewer using keyboard

Navigation/Scroll_PDF_Page/App.config

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+    <startup> 
+        <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7"/>
+    </startup>
+</configuration>

Navigation/Scroll_PDF_Page/App.xaml

@@ -0,0 +1,9 @@
+<Application x:Class="sample.App"
+             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:local="clr-namespace:sample"
+             StartupUri="MainWindow.xaml">
+    <Application.Resources>
+
+    </Application.Resources>
+</Application>

Navigation/Scroll_PDF_Page/App.xaml.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Configuration;
+using System.Data;
+using System.Linq;
+using System.Threading.Tasks;
+using System.Windows;
+
+namespace sample
+{
+    /// <summary>
+    /// Interaction logic for App.xaml
+    /// </summary>
+    public partial class App : Application
+    {
+    }
+}

Navigation/Scroll_PDF_Page/MainWindow.xaml

@@ -0,0 +1,13 @@
+<Window x:Class="sample.MainWindow"
+        xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
+        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+        xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
+        xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
+        xmlns:local="clr-namespace:sample"
+        xmlns:syncfusion="clr-namespace:Syncfusion.Windows.PdfViewer;assembly=Syncfusion.PdfViewer.WPF"
+        mc:Ignorable="d"
+        Title="MainWindow" Height="450" Width="800" Loaded="Window_Loaded">
+    <Grid>
+        <syncfusion:PdfViewerControl x:Name="pdfViewer"></syncfusion:PdfViewerControl>
+    </Grid>
+</Window>

Navigation/Scroll_PDF_Page/MainWindow.xaml.cs

@@ -0,0 +1,103 @@
+using Syncfusion.Pdf.Parsing;
+using Syncfusion.Windows.PdfViewer;
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using System.Windows;
+using System.Windows.Controls;
+using System.Windows.Data;
+using System.Windows.Documents;
+using System.Windows.Input;
+using System.Windows.Media;
+using System.Windows.Media.Imaging;
+using System.Windows.Navigation;
+using System.Windows.Shapes;
+
+namespace sample
+{
+    /// <summary>
+    /// Interaction logic for MainWindow.xaml
+    /// </summary>
+    public partial class MainWindow : Window
+    {
+        bool keyFromTextBoxes = false;
+        public MainWindow()
+        {
+            InitializeComponent();
+            pdfViewer.Load(@"../../Data/PDF_Succinctly.pdf");
+            pdfViewer.KeyDown += PdfViewer_KeyDown;
+        }
+        private void PdfViewer_KeyDown(object sender, KeyEventArgs e)
+        {
+            if (!keyFromTextBoxes)
+            {
+                double zoomFactor = (double)pdfViewer.ZoomPercentage / 100;
+                double scroll = 200;
+                double hScroll = 100;
+                double offset = pdfViewer.VerticalOffset / zoomFactor;
+                double hOffset = pdfViewer.HorizontalOffset / zoomFactor;
+                if (e.Key == Key.J) // Instead of down arrow
+                {
+                    pdfViewer.ScrollTo(offset + scroll);
+                }
+                else if (e.Key == Key.K) // Instead of up arrow
+                {
+                    pdfViewer.ScrollTo(offset - scroll);
+                }
+                else if (e.Key == Key.L) // Instead of right arrow
+                {
+                    pdfViewer.ScrollTo(hOffset + hScroll, offset);
+                }
+                else if (e.Key == Key.H) // Instead of left arrow
+                {
+                    pdfViewer.ScrollTo(hOffset - hScroll, offset);
+                }
+            }
+        }
+        private void Window_Loaded(object sender, RoutedEventArgs e)
+        {
+            DocumentToolbar toolbar = pdfViewer.Template.FindName("PART_Toolbar", pdfViewer) as DocumentToolbar;
+            TextSearchBar textSearch_Toolbar = pdfViewer.Template.FindName("PART_TextSearchBar", pdfViewer) as TextSearchBar;
+            textSearch_Toolbar.PreviewKeyDown += TextSearch_Toolbar_PreviewKeyDown;
+            Button closeButton = (Button)textSearch_Toolbar.Template.FindName("PART_ButtonClose", textSearch_Toolbar);
+            closeButton.Click += CloseButton_Click;
+            TextBox currentPageTextBox = (TextBox)toolbar.Template.FindName("PART_TextCurrentPageIndex", toolbar);
+            currentPageTextBox.GotFocus += CurrentPageTextBox_GotFocus;
+            currentPageTextBox.LostFocus += CurrentPageTextBox_LostFocus;
+            ComboBox comboBox = (ComboBox)toolbar.Template.FindName("PART_ComboBoxCurrentZoomLevel", toolbar);
+            comboBox.GotFocus += ComboBox_GotFocus;
+            comboBox.LostFocus += ComboBox_LostFocus;
+        }
+        private void ComboBox_LostFocus(object sender, RoutedEventArgs e)
+        {
+            keyFromTextBoxes = false;
+        }
+        private void ComboBox_GotFocus(object sender, RoutedEventArgs e)
+        {
+            keyFromTextBoxes = true;
+        }
+        private void CurrentPageTextBox_LostFocus(object sender, RoutedEventArgs e)
+        {
+            keyFromTextBoxes = false;
+        }
+        private void CurrentPageTextBox_GotFocus(object sender, RoutedEventArgs e)
+        {
+            keyFromTextBoxes = true;
+        }
+        private void CloseButton_Click(object sender, RoutedEventArgs e)
+        {
+            keyFromTextBoxes = false;
+        }
+        private void TextSearch_Toolbar_PreviewKeyDown(object sender, KeyEventArgs e)
+        {
+            keyFromTextBoxes = true;
+            if(e.Key == Key.Escape)
+            {
+                keyFromTextBoxes = false;
+            }
+        }
+    }
+}

Navigation/Scroll_PDF_Page/Properties/AssemblyInfo.cs

@@ -0,0 +1,55 @@
+using System.Reflection;
+using System.Resources;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Windows;
+
+// General Information about an assembly is controlled through the following
+// set of attributes. Change these attribute values to modify the information
+// associated with an assembly.
+[assembly: AssemblyTitle("sample")]
+[assembly: AssemblyDescription("")]
+[assembly: AssemblyConfiguration("")]
+[assembly: AssemblyCompany("")]
+[assembly: AssemblyProduct("sample")]
+[assembly: AssemblyCopyright("Copyright ©  2023")]
+[assembly: AssemblyTrademark("")]
+[assembly: AssemblyCulture("")]
+
+// Setting ComVisible to false makes the types in this assembly not visible
+// to COM components.  If you need to access a type in this assembly from
+// COM, set the ComVisible attribute to true on that type.
+[assembly: ComVisible(false)]
+
+//In order to begin building localizable applications, set
+//<UICulture>CultureYouAreCodingWith</UICulture> in your .csproj file
+//inside a <PropertyGroup>.  For example, if you are using US english
+//in your source files, set the <UICulture> to en-US.  Then uncomment
+//the NeutralResourceLanguage attribute below.  Update the "en-US" in
+//the line below to match the UICulture setting in the project file.
+
+//[assembly: NeutralResourcesLanguage("en-US", UltimateResourceFallbackLocation.Satellite)]
+
+
+[assembly: ThemeInfo(
+    ResourceDictionaryLocation.None, //where theme specific resource dictionaries are located
+                                     //(used if a resource is not found in the page,
+                                     // or application resource dictionaries)
+    ResourceDictionaryLocation.SourceAssembly //where the generic resource dictionary is located
+                                              //(used if a resource is not found in the page,
+                                              // app, or any theme specific resource dictionaries)
+)]
+
+
+// Version information for an assembly consists of the following four values:
+//
+//      Major Version
+//      Minor Version
+//      Build Number
+//      Revision
+//
+// You can specify all the values or you can default the Build and Revision Numbers
+// by using the '*' as shown below:
+// [assembly: AssemblyVersion("1.0.*")]
+[assembly: AssemblyVersion("1.0.0.0")]
+[assembly: AssemblyFileVersion("1.0.0.0")]

Navigation/Scroll_PDF_Page/Properties/Resources.resx

@@ -0,0 +1,117 @@
+<?xml version="1.0" encoding="utf-8"?>
+<root>
+  <!-- 
+    Microsoft ResX Schema 
+    
+    Version 2.0
+    
+    The primary goals of this format is to allow a simple XML format 
+    that is mostly human readable. The generation and parsing of the 
+    various data types are done through the TypeConverter classes 
+    associated with the data types.
+    
+    Example:
+    
+    ... ado.net/XML headers & schema ...
+    <resheader name="resmimetype">text/microsoft-resx</resheader>
+    <resheader name="version">2.0</resheader>
+    <resheader name="reader">System.Resources.ResXResourceReader, System.Windows.Forms, ...</resheader>
+    <resheader name="writer">System.Resources.ResXResourceWriter, System.Windows.Forms, ...</resheader>
+    <data name="Name1"><value>this is my long string</value><comment>this is a comment</comment></data>
+    <data name="Color1" type="System.Drawing.Color, System.Drawing">Blue</data>
+    <data name="Bitmap1" mimetype="application/x-microsoft.net.object.binary.base64">
+        <value>[base64 mime encoded serialized .NET Framework object]</value>
+    </data>
+    <data name="Icon1" type="System.Drawing.Icon, System.Drawing" mimetype="application/x-microsoft.net.object.bytearray.base64">
+        <value>[base64 mime encoded string representing a byte array form of the .NET Framework object]</value>
+        <comment>This is a comment</comment>
+    </data>
+                
+    There are any number of "resheader" rows that contain simple 
+    name/value pairs.
+    
+    Each data row contains a name, and value. The row also contains a 
+    type or mimetype. Type corresponds to a .NET class that support 
+    text/value conversion through the TypeConverter architecture. 
+    Classes that don't support this are serialized and stored with the 
+    mimetype set.
+    
+    The mimetype is used for serialized objects, and tells the 
+    ResXResourceReader how to depersist the object. This is currently not 
+    extensible. For a given mimetype the value must be set accordingly:
+    
+    Note - application/x-microsoft.net.object.binary.base64 is the format 
+    that the ResXResourceWriter will generate, however the reader can 
+    read any of the formats listed below.
+    
+    mimetype: application/x-microsoft.net.object.binary.base64
+    value   : The object must be serialized with 
+            : System.Serialization.Formatters.Binary.BinaryFormatter
+            : and then encoded with base64 encoding.
+    
+    mimetype: application/x-microsoft.net.object.soap.base64
+    value   : The object must be serialized with 
+            : System.Runtime.Serialization.Formatters.Soap.SoapFormatter
+            : and then encoded with base64 encoding.
+
+    mimetype: application/x-microsoft.net.object.bytearray.base64
+    value   : The object must be serialized into a byte array 
+            : using a System.ComponentModel.TypeConverter
+            : and then encoded with base64 encoding.
+    -->
+  <xsd:schema id="root" xmlns="" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata">
+    <xsd:element name="root" msdata:IsDataSet="true">
+      <xsd:complexType>
+        <xsd:choice maxOccurs="unbounded">
+          <xsd:element name="metadata">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" />
+              <xsd:attribute name="type" type="xsd:string" />
+              <xsd:attribute name="mimetype" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="assembly">
+            <xsd:complexType>
+              <xsd:attribute name="alias" type="xsd:string" />
+              <xsd:attribute name="name" type="xsd:string" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="data">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+                <xsd:element name="comment" type="xsd:string" minOccurs="0" msdata:Ordinal="2" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" msdata:Ordinal="1" />
+              <xsd:attribute name="type" type="xsd:string" msdata:Ordinal="3" />
+              <xsd:attribute name="mimetype" type="xsd:string" msdata:Ordinal="4" />
+            </xsd:complexType>
+          </xsd:element>
+          <xsd:element name="resheader">
+            <xsd:complexType>
+              <xsd:sequence>
+                <xsd:element name="value" type="xsd:string" minOccurs="0" msdata:Ordinal="1" />
+              </xsd:sequence>
+              <xsd:attribute name="name" type="xsd:string" use="required" />
+            </xsd:complexType>
+          </xsd:element>
+        </xsd:choice>
+      </xsd:complexType>
+    </xsd:element>
+  </xsd:schema>
+  <resheader name="resmimetype">
+    <value>text/microsoft-resx</value>
+  </resheader>
+  <resheader name="version">
+    <value>2.0</value>
+  </resheader>
+  <resheader name="reader">
+    <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+  <resheader name="writer">
+    <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
+  </resheader>
+</root>