DiagramControl Events

Provides a canvas where you or your end-users can display, create and edit various diagrams.

Name	Description
ActiveToolChanged	Fires each time the ActiveTool property changes the value.
AddingNewItem	Fires each time a new item is added to the diagram by the end-user (e.g., dropped from the toolbox, drawn using a tool).
BeforeItemsMoving	Fires each time the end-user attempts to move a diagram item.
BeforeItemsResizing	Raises each time the end-user attempts to resize a diagram item.
BeforeItemsRotating	Raises each time the end-user attempts to rotate a diagram item.
CanvasBoundsChanged	Occurs when the size of the Canvas is changed.
ClosedEditor	Fires after the end-user closes the diagram item’s text editor.
ConnectionChanged	Occurs after the connection has been changed by a user.
ConnectionChanging	Occurs when the connection is about to be changed by the end-user.
ContainerIsCollapsedChanged	Occurs when the container’s collapsed state has been changed.
ContainerIsCollapsedChanging	Occurs when the container’s collapsed state is being changed.
ContextMenuClosing	Occurs just before any context menu on the element is closed. Inherited from FrameworkElement.
ContextMenuOpening	Occurs when any context menu on the element is opened. Inherited from FrameworkElement.
CustomCursor	Occurs when the mouse cursor enters the diagram control.
CustomGetEditableItemProperties	Allows you to modify the list of diagram item properties that can be edited by end-users in the Properties Panel.
CustomGetEditableItemPropertiesCacheKey	Allows you to update the set of properties displayed by the property grid.
CustomGetSerializableItemProperties	Allows you to modify the list of serializable properties of diagram items.
CustomItemDrag	Occurs when an end-user starts dragging a diagram item.
CustomItemDragResult	Occurs before a drag and drop operation is completed.
CustomItemGiveFeedback	Occurs while diagram items are dragged.
CustomItemQueryContinueDrag	Occurs during a drag-and-drop operation.
CustomLoadDocument	Fires after an end-user selects a document in the ‘Open File’ dialog or a document is loaded by setting the DiagramControl.DocumentSource property in code.
CustomLoadImage	Fires after an end-user selects a file in the ‘Insert Picture’ dialog.
CustomSaveDocument	Fires when the diagram is about to be saved (when an end-user uses Save actions in the Diagram’s Ribbon menu, or when the DiagramControl.SaveFile/DiagramControl.SaveFileAs method is called). The event allows you to implement custom saving logic.
DataContextChanged	Occurs when the data context for this element changes. Inherited from FrameworkElement.
DeletingItems	Fires when the end-user removes items from the diagram canvas. Obsoleted. Use the DiagramControl.ItemsDeleting event instead.
DocumentLoaded	Occurs after a document is loaded into the DiagramControl.
DragEnter	Occurs when the input system reports an underlying drag event with this element as the drag target. Inherited from UIElement.
DragLeave	Occurs when the input system reports an underlying drag event with this element as the drag origin. Inherited from UIElement.
DragOver	Occurs when the input system reports an underlying drag event with this element as the potential drop target. Inherited from UIElement.
Drop	Occurs when the input system reports an underlying drop event with this element as the drop target. Inherited from UIElement.
ExceptionMessage	Allows you to handle exceptions that may raise during various actions on the Diagram Control.
FocusableChanged	Occurs when the value of the Focusable property changes. Inherited from UIElement.
GiveFeedback	Occurs when the input system reports an underlying drag-and-drop event that involves this element. Inherited from UIElement.
GotFocus	Occurs when this element gets logical focus. Inherited from UIElement.
GotKeyboardFocus	Occurs when the keyboard is focused on this element. Inherited from UIElement.
GotMouseCapture	Occurs when this element captures the mouse. Inherited from UIElement.
GotStylusCapture	Occurs when this element captures the stylus. Inherited from UIElement.
GotTouchCapture	Occurs when a touch is captured to this element. Inherited from UIElement.
Initialized	Occurs when this FrameworkElement is initialized. This event coincides with cases where the value of the IsInitialized property changes from false (or undefined) to true. Inherited from FrameworkElement.
IsEnabledChanged	Occurs when the value of the IsEnabled property on this element changes. Inherited from UIElement.
IsHitTestVisibleChanged	Occurs when the value of the IsHitTestVisible dependency property changes on this element. Inherited from UIElement.
IsKeyboardFocusedChanged	Occurs when the value of the IsKeyboardFocused property changes on this element. Inherited from UIElement.
IsKeyboardFocusWithinChanged	Occurs when the value of the IsKeyboardFocusWithin property changes on this element. Inherited from UIElement.
IsMouseCapturedChanged	Occurs when the value of the IsMouseCaptured property changes on this element. Inherited from UIElement.
IsMouseCaptureWithinChanged	Occurs when the value of the IsMouseCaptureWithinProperty changes on this element. Inherited from UIElement.
IsMouseDirectlyOverChanged	Occurs when the value of the IsMouseDirectlyOver property changes on this element. Inherited from UIElement.
IsStylusCapturedChanged	Occurs when the value of the IsStylusCaptured property changes on this element. Inherited from UIElement.
IsStylusCaptureWithinChanged	Occurs when the value of the IsStylusCaptureWithin property changes on this element. Inherited from UIElement.
IsStylusDirectlyOverChanged	Occurs when the value of the IsStylusDirectlyOver property changes on this element. Inherited from UIElement.
IsVisibleChanged	Occurs when the value of the IsVisible property changes on this element. Inherited from UIElement.
ItemBoundsChanged	Fires each time an item’s bounds are changed.
ItemContentChanged	Fires each time the end-user changes the item’s text.
ItemCreating	Occurs before a diagram item is added to the canvas.
ItemDrawing	Fires repeatedly as the end-user is drawing a shape using a drawing tool (Rectangle, Ellipse, Right Triangle or Hexagon).
ItemInitializing	Fires each time an item is created via the DevExpress.Diagram.Core.ItemTool.
ItemsChanged	Fires each time an item is added or removed from the diagram.
ItemsDeleting	Fires each time diagram items have been removed from the canvas.
ItemsMoving	Fires as the end-user is moving diagram items.
ItemsPasting	Fires as the end-user pastes the diagram items from the clipboard onto the canvas.
ItemsResizing	Fires when a diagram item is resized by the end-user or programmatically.
ItemsRotating	Fires when the end-user attempts to rotate a diagram item.
KeyDown	Occurs when a key is pressed while focus is on this element. Inherited from UIElement.
KeyUp	Occurs when a key is released while focus is on this element. Inherited from UIElement.
LayoutUpdated	Occurs when the layout of the various visual elements associated with the current Dispatcher changes. Inherited from UIElement.
Loaded	Occurs when the element is laid out, rendered, and ready for interaction. Inherited from FrameworkElement.
LostFocus	Occurs when this element loses logical focus. Inherited from UIElement.
LostKeyboardFocus	Occurs when the keyboard is no longer focused on this element. Inherited from UIElement.
LostMouseCapture	Occurs when this element loses mouse capture. Inherited from UIElement.
LostStylusCapture	Occurs when this element loses stylus capture. Inherited from UIElement.
LostTouchCapture	Occurs when this element loses a touch capture. Inherited from UIElement.
ManipulationBoundaryFeedback	Occurs when the manipulation encounters a boundary. Inherited from UIElement.
ManipulationCompleted	Occurs when a manipulation and inertia on the UIElement object is complete. Inherited from UIElement.
ManipulationDelta	Occurs when the input device changes position during a manipulation. Inherited from UIElement.
ManipulationInertiaStarting	Occurs when the input device loses contact with the UIElement object during a manipulation and inertia begins. Inherited from UIElement.
ManipulationStarted	Occurs when an input device begins a manipulation on the UIElement object. Inherited from UIElement.
ManipulationStarting	Occurs when the manipulation processor is first created. Inherited from UIElement.
MouseDoubleClick	Occurs when a mouse button is clicked two or more times. Inherited from Control.
MouseDown	Occurs when any mouse button is pressed while the pointer is over this element. Inherited from UIElement.
MouseEnter	Occurs when the mouse pointer enters the bounds of this element. Inherited from UIElement.
MouseLeave	Occurs when the mouse pointer leaves the bounds of this element. Inherited from UIElement.
MouseLeftButtonDown	Occurs when the left mouse button is pressed while the mouse pointer is over this element. Inherited from UIElement.
MouseLeftButtonUp	Occurs when the left mouse button is released while the mouse pointer is over this element. Inherited from UIElement.
MouseMove	Occurs when the mouse pointer moves while over this element. Inherited from UIElement.
MouseRightButtonDown	Occurs when the right mouse button is pressed while the mouse pointer is over this element. Inherited from UIElement.
MouseRightButtonUp	Occurs when the right mouse button is released while the mouse pointer is over this element. Inherited from UIElement.
MouseUp	Occurs when any mouse button is released over this element. Inherited from UIElement.
MouseWheel	Occurs when the user rotates the mouse wheel while the mouse pointer is over this element. Inherited from UIElement.
PreviewDragEnter	Occurs when the input system reports an underlying drag event with this element as the drag target. Inherited from UIElement.
PreviewDragLeave	Occurs when the input system reports an underlying drag event with this element as the drag origin. Inherited from UIElement.
PreviewDragOver	Occurs when the input system reports an underlying drag event with this element as the potential drop target. Inherited from UIElement.
PreviewDrop	Occurs when the input system reports an underlying drop event with this element as the drop target. Inherited from UIElement.
PreviewGiveFeedback	Occurs when a drag-and-drop operation is started. Inherited from UIElement.
PreviewGotKeyboardFocus	Occurs when the keyboard is focused on this element. Inherited from UIElement.
PreviewKeyDown	Occurs when a key is pressed while focus is on this element. Inherited from UIElement.
PreviewKeyUp	Occurs when a key is released while focus is on this element. Inherited from UIElement.
PreviewLostKeyboardFocus	Occurs when the keyboard is no longer focused on this element. Inherited from UIElement.
PreviewMouseDoubleClick	Occurs when a user clicks the mouse button two or more times. Inherited from Control.
PreviewMouseDown	Occurs when any mouse button is pressed while the pointer is over this element. Inherited from UIElement.
PreviewMouseLeftButtonDown	Occurs when the left mouse button is pressed while the mouse pointer is over this element. Inherited from UIElement.
PreviewMouseLeftButtonUp	Occurs when the left mouse button is released while the mouse pointer is over this element. Inherited from UIElement.
PreviewMouseMove	Occurs when the mouse pointer moves while the mouse pointer is over this element. Inherited from UIElement.
PreviewMouseRightButtonDown	Occurs when the right mouse button is pressed while the mouse pointer is over this element. Inherited from UIElement.
PreviewMouseRightButtonUp	Occurs when the right mouse button is released while the mouse pointer is over this element. Inherited from UIElement.
PreviewMouseUp	Occurs when any mouse button is released while the mouse pointer is over this element. Inherited from UIElement.
PreviewMouseWheel	Occurs when the user rotates the mouse wheel while the mouse pointer is over this element. Inherited from UIElement.
PreviewQueryContinueDrag	Occurs when there is a change in the keyboard or mouse button state during a drag-and-drop operation. Inherited from UIElement.
PreviewStylusButtonDown	Occurs when the stylus button is pressed while the pointer is over this element. Inherited from UIElement.
PreviewStylusButtonUp	Occurs when the stylus button is released while the pointer is over this element. Inherited from UIElement.
PreviewStylusDown	Occurs when the stylus touches the digitizer while it is over this element. Inherited from UIElement.
PreviewStylusInAirMove	Occurs when the stylus moves over an element without actually touching the digitizer. Inherited from UIElement.
PreviewStylusInRange	Occurs when the stylus is close enough to the digitizer to be detected, while over this element. Inherited from UIElement.
PreviewStylusMove	Occurs when the stylus moves while over the element. The stylus must move while being detected by the digitizer to raise this event, otherwise, PreviewStylusInAirMove is raised instead. Inherited from UIElement.
PreviewStylusOutOfRange	Occurs when the stylus is too far from the digitizer to be detected. Inherited from UIElement.
PreviewStylusSystemGesture	Occurs when a user performs one of several stylus gestures. Inherited from UIElement.
PreviewStylusUp	Occurs when the user raises the stylus off the digitizer while the stylus is over this element. Inherited from UIElement.
PreviewTextInput	Occurs when this element gets text in a device-independent manner. Inherited from UIElement.
PreviewTouchDown	Occurs when a finger touches the screen while the finger is over this element. Inherited from UIElement.
PreviewTouchMove	Occurs when a finger moves on the screen while the finger is over this element. Inherited from UIElement.
PreviewTouchUp	Occurs when a finger is raised off of the screen while the finger is over this element. Inherited from UIElement.
QueryConnectionPoints	Fires each time the end-user moves the cursor with the active Connector Tool near shapes or their connection points.
QueryContinueDrag	Occurs when there is a change in the keyboard or mouse button state during a drag-and-drop operation. Inherited from UIElement.
QueryCursor	Occurs when the cursor is requested to display. This event is raised on an element each time that the mouse pointer moves to a new location, which means the cursor object might need to be changed based on its new position. Inherited from UIElement.
QueryItemDrawAction	Fires repeatedly as the end-user hovers over the diagram canvas while a drawing tool (Rectangle, Ellipse, Right Triangle or Hexagon) is selected.
QueryItemEditAction	Fires each time the end-user attempts to initiate text editing to edit the text within a diagram item.
QueryItemsAction	Fires each time the DiagramControl queries whether an action can be performed on specific diagram items.
QueryItemSnapping	Fires repeatedly as the end-user triggers snapping while dragging or resizing a diagram shape.
RelayoutItemsCompleted	Occurs immediately after an Automatic Layout algorithm is completed.
RequestBringIntoView	Occurs when BringIntoView(Rect) is called on this element. Inherited from FrameworkElement.
SelectionChanged	Fires when the selection changes (new items are selected, or currently selected items are deselected).
ShowingEditor	Enables you to prevent an end-user from activating the editors of individual diagram items.
ShowingExportDialog
ShowingOpenDialog	Fires before showing an ‘Open File’ dialog, and allows it to be customized.
ShowingOpenImageDialog	Fires before showing an ‘Insert Picture’ dialog, and allows it to be customized.
ShowingSaveDialog	Fires before showing a ‘Save File As’ dialog, and allows it to be customized.
SizeChanged	Occurs when either the ActualHeight or the ActualWidth properties change value on this element. Inherited from FrameworkElement.
SourceUpdated	Occurs when the source value changes for any existing property binding on this element. Inherited from FrameworkElement.
StylusButtonDown	Occurs when the stylus button is pressed while the pointer is over this element. Inherited from UIElement.
StylusButtonUp	Occurs when the stylus button is released while the pointer is over this element. Inherited from UIElement.
StylusDown	Occurs when the stylus touches the digitizer while the stylus is over this element. Inherited from UIElement.
StylusEnter	Occurs when the stylus enters the bounds of this element. Inherited from UIElement.
StylusInAirMove	Occurs when the stylus moves over an element without actually touching the digitizer. Inherited from UIElement.
StylusInRange	Occurs when the stylus is close enough to the digitizer to be detected, while over this element. Inherited from UIElement.
StylusLeave	Occurs when the stylus leaves the bounds of the element. Inherited from UIElement.
StylusMove	Occurs when the stylus moves over this element. The stylus must move while on the digitizer to raise this event. Otherwise, StylusInAirMove is raised instead. Inherited from UIElement.
StylusOutOfRange	Occurs when the stylus is too far from the digitizer to be detected, while over this element. Inherited from UIElement.
StylusSystemGesture	Occurs when a user performs one of several stylus gestures. Inherited from UIElement.
StylusUp	Occurs when the user raises the stylus off the digitizer while it is over this element. Inherited from UIElement.
SubordinatesHidden	Occurs after the subordinates of a diagram shape are hidden.
SubordinatesHiding	Occurs before a DiagramItem‘s subordinates are hidden.
SubordinatesShowing	Occurs before a DiagramItem‘s subordinates are shown.
SubordinatesShown	Occurs after a DiagramItem‘s subordinates are shown.
TargetUpdated	Occurs when the target value changes for any property binding on this element. Inherited from FrameworkElement.
TextInput	Occurs when this element gets text in a device-independent manner. Inherited from UIElement.
ToolTipClosing	Occurs just before any tooltip on the element is closed. Inherited from FrameworkElement.
ToolTipOpening	Occurs when any tooltip on the element is opened. Inherited from FrameworkElement.
TouchDown	Occurs when a finger touches the screen while the finger is over this element. Inherited from UIElement.
TouchEnter	Occurs when a touch moves from outside to inside the bounds of this element. Inherited from UIElement.
TouchLeave	Occurs when a touch moves from inside to outside the bounds of this element. Inherited from UIElement.
TouchMove	Occurs when a finger moves on the screen while the finger is over this element. Inherited from UIElement.
TouchUp	Occurs when a finger is raised off of the screen while the finger is over this element. Inherited from UIElement.
Unloaded	Occurs when the element is removed from within an element tree of loaded elements. Inherited from FrameworkElement.
ZoomFactorChanged	Raises each time the current diagram zoom factor is changed.