(Inherited from FrameworkElement), Gets or sets the horizontal alignment characteristics that are applied to a FrameworkElement when it is composed in a layout parent, such as a panel or items control. To force the display, you set the Popup.IsOpen property to true within the handler. Definition and Usage The oncontextmenu event occurs when the user right-clicks on an element to open the context menu. (Inherited from FrameworkElement. Gets or sets a value that indicates whether the ContextMenu is visible. The typical reason for setting Handled to true in the event data is to replace the menu entirely with a new ContextMenu object, which sometimes requires canceling the operation and starting a new open. (Inherited from FrameworkElement. (Inherited from ItemsControl. (Inherited from FrameworkElement), Gets or sets the width of a FrameworkElement. (Inherited from Control), Gets or sets an object source used to generate the content of the ItemsControl. Because you assume that the ContextMenu is about to be displayed, your handler then sets Handled to true in the event data. (Inherited from Control), Gets or sets the context menu element that should appear whenever the context menu is requested through user interface (UI) from within this element. ), Occurs when the input system reports an underlying drag event with this element as the target. ), Gets or sets the font used to display text in the control. To the ContextMenuService that is responsible for context menu display, a true value for Handled in the event data represents a request to cancel the display for the context menu / control combination that raised the event. (Inherited from FrameworkElement), Gets a value that determines whether this element has logical focus. An alternative scenario is if you want to replace the entire context menu. This is why you always need to check for null or use a flag if you open a context menu from within a ContextMenuOpening event handler. (Inherited from UIElement.). (Inherited from ItemsControl. Let’s create a new WPF project with the name WPFContextMenuControl. If you assign a ContextMenu to the FrameworkElement.ContextMenu or FrameworkContentElement.ContextMenu property, the ContextMenuService class handles context menu operations in response to user interaction. Also, if the user happens to right-click a second time, this time your new ContextMenu appears, the value is non null, and your handler will properly replace and display the menu when the handler runs a second time. This is a dependency property. In case the context menu key is pressed, the event is triggered on the html element or the currently focused element. (Inherited from UIElement), Occurs when the input system reports an underlying drop event with this element as the drop target. (Inherited from UIElement), Occurs when the input system reports an underlying drag event with this element as the origin. ContextMenu is a pop-up menu that enables a control to expose functionality that is specific … ), Occurs when the input system reports an underlying drag event with this element as the target. When you compile and execute the above code, it will produce the following window −. This event is typically triggered by clicking the right mouse button, or by pressing the context menu key. (Inherited from Control), Gets or sets the thickness of the specified font. When a XAML processor creates the object tree from XAML markup, run-time code can refer to the XAML-declared object by this name. (Inherited from Control), Occurs when a keyboard key is pressed while the UIElement has focus. (Inherited from Control), Gets a collection of GroupStyle objects that define the appearance of each level of groups. Setting the new one is basically the same as the previous handler: you build a new ContextMenu and set the control source's FrameworkElement.ContextMenu property with it. (Inherited from DependencyObject). (Inherited from Control), Returns the local value of a dependency property, if a local value is set. (Inherited from UIElement), Occurs when the IsEnabled property changes. (Inherited from UIElement), Occurs when a UIElement receives focus. This is a dependency property. The ContextMenuService that is responsible for displaying a context menu will check the event data of the event it raised on the control. A ContextMenu represents a pop-up menu that enables a control to expose a functionality … But if you want to use the handler to suppress a context menu and show nothing, then your handler should simply set Handled to true in the event data. (Inherited from ItemsControl), Gets or sets the outer margin of a FrameworkElement. Now that you have suppressed the potentially suspect context menu, the next step is to supply a new one, then display it. Be careful when you do this, because opening the context menu in the handler raises the ContextMenuOpening event again. (Inherited from Control), Called before the DragOver event occurs. We recommend that you execute the above example code and try some other properties and events of ContextMenu. (Inherited from FrameworkElement. ContextMenu is a pop-up menu that enables a control to expose functionality that is specific to the context of the control. (Inherited from Control), Occurs when a keyboard key is pressed while the UIElement has focus. (Inherited from UIElement), Occurs when the input system reports an underlying drag event with this element as the origin.
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