DiagramControl Events

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

Name	Description
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).
AutoSizeChanged	This event is not relevant for this class. Inherited from Control.
BackColorChanged	This member is not supported.
BackgroundImageChanged	Occurs when the value of the BackgroundImage property changes. Inherited from Control.
BackgroundImageLayoutChanged	Occurs when the BackgroundImageLayout property changes. Inherited from Control.
BeforeItemsMoving	Raises 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.
BindingContextChanged	Occurs when the value of the BindingContext property changes. Inherited from Control.
CanRedoChanged	Fires each time the value of the DiagramControl.CanRedo property is changed.
CanUndoChanged	Fires each time the value of the DiagramControl.CanUndo property is changed.
CanvasBoundsChanged	Occurs when the size of the canvas is changed.
CausesValidationChanged	Occurs when the value of the CausesValidation property changes. Inherited from Control.
ChangeUICues	Occurs when the focus or keyboard user interface (UI) cues change. Inherited from Control.
Click	Occurs when the control is clicked. Inherited from Control.
ClientSizeChanged	Occurs when the value of the ClientSize property changes. Inherited from Control.
ClosedEditor	Fires after the end-user closes the diagram item’s text editor.
ConnectionChanged	Occurs after the connection has been changed by the end-user.
ConnectionChanging	Occurs when the connection is about to be changed by the end-user.
ContainerIsCollapsedChanged
ContainerIsCollapsedChanging
ContextMenuChanged	Occurs when the value of the ContextMenu property changes. Inherited from Control.
ContextMenuStripChanged	Occurs when the value of the ContextMenuStrip property changes. Inherited from Control.
ControlAdded	Occurs when a new control is added to the Control.ControlCollection. Inherited from Control.
ControlRemoved	Occurs when a control is removed from the Control.ControlCollection. Inherited from Control.
CursorChanged	Occurs when the value of the Cursor property changes. Inherited from Control.
CustomCursor	Occurs when the mouse cursor enters the diagram control.
CustomDrawBackground	Occurs before the Canvas background is rendered.
CustomDrawItem	Provides the ability to customize the appearance of diagram items.
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.
CustomHitTest	Occurs each time the cursor moves while hovering over a diagram item.
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 file in the ‘Open File’ dialog, or after a document load is initiated 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.
DeletingItems	Fires when the end-user removes items from the diagram canvas. Obsoleted. Use the DiagramControl.ItemsDeleting event instead.
Disposed	Occurs when the component is disposed by a call to the Dispose() method. Inherited from Component.
DockChanged	Occurs when the value of the Dock property changes. Inherited from Control.
DocumentLoaded	Occurs after a document is loaded into the DiagramControl.
DoubleClick	Occurs when the control is double-clicked. Inherited from Control.
DpiChangedAfterParent	Occurs when the DPI setting for a control is changed programmatically after the DPI of its parent control or form has changed. Inherited from Control.
DpiChangedBeforeParent	Occurs when the DPI setting for a control is changed programmatically before a DPI change event for its parent control or form has occurred. Inherited from Control.
DragDrop	Occurs when a drag-and-drop operation is completed. Inherited from Control.
DragEnter	Occurs when an object is dragged into the control’s bounds. Inherited from Control.
DragLeave	Occurs when an object is dragged out of the control’s bounds. Inherited from Control.
DragOver	Occurs when an object is dragged over the control’s bounds. Inherited from Control.
EnabledChanged	Occurs when the Enabled property value has changed. Inherited from Control.
Enter	Occurs when the control is entered. Inherited from Control.
ExceptionMessage	Allows you to handle exceptions that may raise during various actions on the Diagram Control.
FontChanged	This member is not supported by the DiagramControl class.
ForeColorChanged	This member is not supported by the DiagramControl class.
GiveFeedback	Occurs during a drag operation. Inherited from Control.
GotFocus	Occurs when the control receives focus. Inherited from Control.
HandleCreated	Occurs when a handle is created for the control. Inherited from Control.
HandleDestroyed	Occurs when the control’s handle is in the process of being destroyed. Inherited from Control.
HasChangesChanged	Fires each time the value of the DiagramControl.HasChanges property is changed.
HelpRequested	Occurs when the user requests help for a control. Inherited from Control.
ImeModeChanged	Occurs when the ImeMode property has changed. Inherited from Control.
Invalidated	Occurs when a control’s display requires redrawing. Inherited from Control.
IsTextEditModeChanged	Fires each time the value of the DiagramControl.IsTextEditMode property is changed.
ItemBoundsChanged	Fires each time an item’s bounds are changed.
ItemContentChanged	Fires each time the end-user changes the item’s text.
ItemCreating	Occurs when the DiagramControl creates a diagram item.
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 the control has focus. Inherited from Control.
KeyPress	Occurs when a character. space or backspace key is pressed while the control has focus. Inherited from Control.
KeyUp	Occurs when a key is released while the control has focus. Inherited from Control.
Layout	Occurs when a control should reposition its child controls. Inherited from Control.
Leave	Occurs when the input focus leaves the control. Inherited from Control.
LocationChanged	Occurs when the Location property value has changed. Inherited from Control.
LostFocus	Occurs when the control loses focus. Inherited from Control.
MarginChanged	Occurs when the control’s margin changes. Inherited from Control.
MouseCaptureChanged	Occurs when the control loses mouse capture. Inherited from Control.
MouseClick	Occurs when the control is clicked by the mouse. Inherited from Control.
MouseDoubleClick	Occurs when the control is double clicked by the mouse. Inherited from Control.
MouseDown	Occurs when the mouse pointer is over the control and a mouse button is pressed. Inherited from Control.
MouseEnter	Occurs when the mouse pointer enters the control. Inherited from Control.
MouseHover	Occurs when the mouse pointer rests on the control. Inherited from Control.
MouseLeave	Occurs when the mouse pointer leaves the control. Inherited from Control.
MouseMove	Occurs when the mouse pointer is moved over the control. Inherited from Control.
MouseUp	Occurs when the mouse pointer is over the control and a mouse button is released. Inherited from Control.
MouseWheel	Occurs when the mouse wheel moves while the control has focus. Inherited from Control.
Move	Occurs when the control is moved. Inherited from Control.
PaddingChanged	Occurs when the control’s padding changes. Inherited from Control.
Paint	Occurs when the control is redrawn. Inherited from Control.
ParentChanged	Occurs when the Parent property value changes. Inherited from Control.
PreviewKeyDown	Occurs before the KeyDown event when a key is pressed while focus is on this control. Inherited from Control.
QueryAccessibilityHelp	Occurs when AccessibleObject is providing help to accessibility applications. Inherited from Control.
QueryConnectionPoints	Fires each time the end-user moves the cursor with the active Connector Tool near shapes or their connection points.
QueryContinueDrag	Occurs during a drag-and-drop operation and enables the drag source to determine whether the drag-and-drop operation should be canceled. Inherited from Control.
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 end-user attempts to perform an action on a diagram item.
QueryItemSnapping	Fires repeatedly as the end-user triggers snapping while dragging or resizing a diagram shape.
RegionChanged	Occurs when the value of the Region property changes. Inherited from Control.
RelayoutItemsCompleted	Occurs immediately after an Automatic Layout algorithm is completed.
Resize	Occurs when the control is resized. Inherited from Control.
RightToLeftChanged	Occurs when the RightToLeft property value changes. Inherited from Control.
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.
ShowingOpenDialog	Fires before showing an ‘Open File’ dialog, and allows it to be customized or replaced.
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 or replaced.
SizeChanged	Occurs when the Size property value changes. Inherited from Control.
StyleChanged	Occurs when the control style changes. Inherited from Control.
SubordinatesHidden	Occurs after a DiagramItem‘s subordinates 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.
SystemColorsChanged	Occurs when the system colors change. Inherited from Control.
TabIndexChanged	Occurs when the TabIndex property value changes. Inherited from Control.
TabStopChanged	Occurs when the TabStop property value changes. Inherited from Control.
TextChanged	Occurs when the Text property value changes. Inherited from Control.
TitleChanged	Fires each time the value of the DiagramControl.Title property is changed.
Validated	Occurs when the control is finished validating. Inherited from Control.
Validating	Occurs when the control is validating. Inherited from Control.
VisibleChanged	Occurs when the Visible property value changes. Inherited from Control.
ZoomFactorChanged	Raises each time the current diagram zoom factor is changed.