wpf-devexpress-dot-xpf-dot-pdfviewer-dot-pdfviewercontrol-2dc98b9c.md
Occurs before the popup menu of a PDF Viewer has been invoked.
Namespace : DevExpress.Xpf.PdfViewer
Assembly : DevExpress.Xpf.PdfViewer.v25.2.dll
NuGet Package : DevExpress.Wpf.PdfViewer
public event PopupMenuShowingEventHandler PopupMenuShowing
Public Event PopupMenuShowing As PopupMenuShowingEventHandler
The PopupMenuShowing event's data class is PopupMenuShowingEventArgs. The following properties provide information specific to this event:
| Property | Description |
|---|---|
| Actions | Provides access to the collection of actions. |
| Cancel | Gets or sets whether the event should be canceled. |
| Handled | Gets or sets a value that indicates the present state of the event handling for a routed event as it travels the route. Inherited from RoutedEventArgs. |
| OriginalSource | Gets the original reporting source as determined by pure hit testing, before any possible Source adjustment by a parent class. Inherited from RoutedEventArgs. |
| RoutedEvent | Gets or sets the RoutedEvent associated with this RoutedEventArgs instance. Inherited from RoutedEventArgs. |
| Source | Gets or sets a reference to the object that raised the event. Inherited from RoutedEventArgs. |
The event data class exposes the following methods:
| Method | Description |
|---|---|
| InvokeEventHandler(Delegate, Object) | When overridden in a derived class, provides a way to invoke event handlers in a type-specific way, which can increase efficiency over the base implementation. Inherited from RoutedEventArgs. |
| OnSetSource(Object) | When overridden in a derived class, provides a notification callback entry point whenever the value of the Source property of an instance changes. Inherited from RoutedEventArgs. |
This example shows how to remove items and add the “Save As…” item to the page content pop-up menu:
<Window
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:PopupMenuShowing"
xmlns:dxpdf="http://schemas.devexpress.com/winfx/2008/xaml/pdf" x:Class="PopupMenuShowing.MainWindow"
mc:Ignorable="d"
Title="MainWindow" Height="350" Width="525">
<Grid>
<dxpdf:PdfViewerControl x:Name="viewer"
PopupMenuShowing="Viewer_PopupMenuShowing"/>
</Grid>
</Window>
using System.Windows;
using DevExpress.Xpf.PdfViewer;
using DevExpress.Xpf.Bars;
namespace PopupMenuShowing {
public partial class MainWindow : Window {
public MainWindow() {
InitializeComponent();
// Load a document.
viewer.OpenDocument("..\\..\\Demo.pdf");
}
private void Viewer_PopupMenuShowing(DependencyObject d, PopupMenuShowingEventArgs e) {
// Remove the Hand tool item from the page context popup menu.
RemoveAction removeHandTool = new RemoveAction();
removeHandTool.ElementName = DefaultPdfBarManagerItemNames.HandTool;
e.Actions.Add(removeHandTool);
// Remove the Select All item from the page context popup menu.
RemoveAction removeSelectAll = new RemoveAction();
removeSelectAll.ElementName = DefaultPdfBarManagerItemNames.SelectAll;
e.Actions.Add(removeSelectAll);
// Insert the "Save As..." item that invokes the Save As dialog.
BarButtonItem barButtonItem = new BarButtonItem();
barButtonItem.Content = "Save As...";
barButtonItem.Command = viewer.SaveAsCommand;
InsertAction insertBarButtonItem = new InsertAction();
insertBarButtonItem.ContainerName = DefaultPdfBarManagerItemNames.ContextMenu;
insertBarButtonItem.Element = barButtonItem;
e.Actions.Add(insertBarButtonItem);
}
}
}
Imports System.Windows
Imports DevExpress.Xpf.PdfViewer
Imports DevExpress.Xpf.Bars
Namespace PopupMenuShowing
Partial Public Class MainWindow
Inherits Window
Public Sub New()
InitializeComponent()
' Load a document.
viewer.OpenDocument("..\..\Demo.pdf")
End Sub
Private Sub Viewer_PopupMenuShowing(ByVal d As DependencyObject, ByVal e As PopupMenuShowingEventArgs)
' Remove the Hand tool item from the page context popup menu.
Dim removeHandTool As New RemoveAction()
removeHandTool.ElementName = DefaultPdfBarManagerItemNames.HandTool
e.Actions.Add(removeHandTool)
' Remove the Select All item from the page context popup menu.
Dim removeSelectAll As New RemoveAction()
removeSelectAll.ElementName = DefaultPdfBarManagerItemNames.SelectAll
e.Actions.Add(removeSelectAll)
' Insert the "Save As..." item that invokes the Save As dialog.
Dim barButtonItem As New BarButtonItem()
barButtonItem.Content = "Save As..."
barButtonItem.Command = viewer.SaveAsCommand
Dim insertBarButtonItem As New InsertAction()
insertBarButtonItem.ContainerName = DefaultPdfBarManagerItemNames.ContextMenu
insertBarButtonItem.Element = barButtonItem
e.Actions.Add(insertBarButtonItem)
End Sub
End Class
End Namespace
The following code snippet (auto-collected from DevExpress Examples) contains a reference to the PopupMenuShowing event.
Note
The algorithm used to collect these code examples remains a work in progress. Accordingly, the links and snippets below may produce inaccurate results. If you encounter an issue with code examples below, please use the feedback form on this page to report the issue.
wpf-pdf-viewer-customize-the-popup-menu/CS/MainWindow.xaml#L12
<dxpdf:PdfViewerControl x:Name="viewer" PopupMenuShowing="Viewer_PopupMenuShowing"/>
wpf-pdf-viewer-customize-the-popup-menu/CS/obj/Debug/net8.0-windows/MainWindow.g.cs#L87
#line 12 "..\..\..\MainWindow.xaml"
this.viewer.PopupMenuShowing += new DevExpress.Xpf.PdfViewer.PopupMenuShowingEventHandler(this.Viewer_PopupMenuShowing);
wpf-pdf-viewer-customize-the-popup-menu/VB/obj/Debug/net8.0-windows/MainWindow.g.vb#L87
#ExternalSource("..\..\..\MainWindow.xaml",12)
AddHandler Me.viewer.PopupMenuShowing, New DevExpress.Xpf.PdfViewer.PopupMenuShowingEventHandler(AddressOf Me.Viewer_PopupMenuShowing)
See Also