GongSolutions.WPF.DragDrop

The default drag handler for GongSolutions.Wpf.DragDrop.

Queries whether a drag can be started.

Information about the drag. To allow a drag to be started, the property on should be set to a value other than .

Determines whether this instance [can start drag] the specified drag information.

The drag information.

Notifies the drag handler that a drop has occurred.

Information about the drop.

Notifies the drag handler that a drag has been aborted.

Notifies that an exception has occurred upon dragging.

The exception that occurrred. Boolean indicating whether the exception is handled in the drag handler. False will rethrow the exception.

A default insertion drop handler for the most common usages

Determines whether the data of the drag drop action should be copied otherwise moved.

The DropInfo with a valid DragInfo.

Updates the current drag state.

Information about the drag. To allow a drop at the current drag position, the property on should be set to a value other than and should be set to a non-null value.

Performs a drop.

Information about the drop.

Test the specified drop information for the right data.

The drop information.

Gets the drag handler from the drag info or from the sender, if the drag info is null

the drag info object the sender from an event, e.g. mouse down, mouse move

Gets the drop handler from the drop info or from the sender, if the drop info is null

the drop info object the sender from an event, e.g. drag over

Gets or Sets whether the control can be used as drag source.

Gets whether the control can be used as drag source.

Sets whether the control can be used as drag source.

Gets or Sets whether the control can be used as drop target.

Gets whether the control can be used as drop target.

Sets whether the control can be used as drop target.

Gets or Sets whether the control can be used as drag source together with the right mouse.

Gets whether the control can be used as drag source together with the right mouse.

Sets whether the control can be used as drag source together with the right mouse.

Gets the default DragHandler.

Gets the default DropHandler.

Gets or Sets the handler for the drag action.

Gets the handler for the drag action.

Sets the handler for the drag action.

Gets or Sets the handler for the drop action.

Gets the handler for the drop action.

Sets the handler for the drop action.

Gets or Sets the ScrollingMode for the drop action.

Gets the ScrollingMode for the drop action.

Sets the ScrollingMode for the drop action.

Gets or Sets the brush for the DropTargetAdorner.

Gets the brush for the DropTargetAdorner.

Sets the brush for the DropTargetAdorner.

Gets or Sets a context for a control. Only controls with the same context are allowed for drag or drop actions.

Gets a context for a control. Only controls with the same context are allowed for drag or drop actions.

Sets a context for a control. Only controls with the same context are allowed for drag or drop actions.

Gets or Sets whether an element under the mouse should be ignored for the drag action.

Gets whether an element under the mouse should be ignored for the drag action.

Sets whether an element under the mouse should be ignored for the drag action.

Gets or Sets wheter the drag action should be started only directly on a selected item or also on the free control space (e.g. in a ListBox).

Gets wheter the drag action should be started only directly on a selected item.

Sets wheter the drag action should be started only directly on a selected item.

The drag drop copy key state property (default None). So the drag drop action is - Move, within the same control or from one to another, if the drag drop key state is None - Copy, from one to another control with the given drag drop copy key state

Gets the copy key state which indicates the effect of the drag drop operation.

Sets the copy key state which indicates the effect of the drag drop operation.

Gets or Sets whether if the default DragAdorner should be use.

Gets whether if the default DragAdorner is used.

Sets whether if the default DragAdorner should be use.

Gets or Sets the opacity of the default DragAdorner.

Gets the opacity of the default DragAdorner.

Sets the opacity of the default DragAdorner.

Gets or Sets the horizontal and vertical proportion at which the pointer will anchor on the DragAdorner.

Gets the horizontal and vertical proportion at which the pointer will anchor on the DragAdorner.

Sets the horizontal and vertical proportion at which the pointer will anchor on the DragAdorner.

Gets or Sets a DataTemplate for the DragAdorner.

Gets the DataTemplate for the DragAdorner.

Sets the DataTemplate for the DragAdorner.

Gets or Sets a DataTemplateSelector for the DragAdorner.

Gets the DataTemplateSelector for the DragAdorner.

Use descendant bounds of the VisualSourceItem as MinWidth for the DragAdorner.

Get the flag which indicates if the DragAdorner use the descendant bounds of the VisualSourceItem as MinWidth.

Set the flag which indicates if the DragAdorner use the descendant bounds of the VisualSourceItem as MinWidth.

Gets or Sets whether if the default DataTemplate for the effects should be use.

Gets whether if the default DataTemplate for the effects should be use.

Sets whether if the default DataTemplate for the effects should be use.

Gets or Sets a EffectAdorner DataTemplate for effect type None.

Gets a EffectAdorner DataTemplate for effect type None.

Sets a EffectAdorner DataTemplate for effect type None.

Gets or Sets a EffectAdorner DataTemplate for effect type Copy.

Gets a EffectAdorner DataTemplate for effect type Copy.

Sets a EffectAdorner DataTemplate for effect type Copy.

Gets or Sets a EffectAdorner DataTemplate for effect type Move.

Gets a EffectAdorner DataTemplate for effect type Move.

Sets a EffectAdorner DataTemplate for effect type Move.

Gets or Sets a EffectAdorner DataTemplate for effect type Link.

Gets a EffectAdorner DataTemplate for effect type Link.

Sets a EffectAdorner DataTemplate for effect type Link.

Gets or Sets a EffectAdorner DataTemplate for effect type All.

Gets a EffectAdorner DataTemplate for effect type All.

Sets a EffectAdorner DataTemplate for effect type All.

Gets or Sets a EffectAdorner DataTemplate for effect type Scroll.

Gets a EffectAdorner DataTemplate for effect type Scroll.

Sets a EffectAdorner DataTemplate for effect type Scroll.

Gets or Sets the Orientation which should be used for the drag drop action (default null). Normally it will be look up to find the correct orientaion of the inner ItemsPanel, but sometimes it's necessary to force the oreintation, if the look up is wrong.

Gets the Orientation which should be used for the drag drop action (default null). Normally it will be look up to find the correct orientaion of the inner ItemsPanel, but sometimes it's necessary to force the oreintation, if the look up is wrong.

Sets the Orientation which should be used for the drag drop action (default null). Normally it will be look up to find the correct orientaion of the inner ItemsPanel, but sometimes it's necessary to force the oreintation, if the look up is wrong.

Holds information about a the source of a drag drop operation.

The class holds all of the framework's information about the source of a drag. It is used by to determine whether a drag can start, and what the dragged data should be.

Initializes a new instance of the DragInfo class.

The sender of the mouse event that initiated the drag. The mouse event that initiated the drag.

Gets or sets the drag data.

This must be set by a drag handler in order for a drag to start.

Gets the position of the click that initiated the drag, relative to .

Gets the point where the cursor was relative to the item being dragged when the drag was started.

Gets or sets the allowed effects for the drag.

This must be set to a value other than by a drag handler in order for a drag to start.

Gets the mouse button that initiated the drag.

Gets the collection that the source ItemsControl is bound to.

If the control that initated the drag is unbound or not an ItemsControl, this will be null.

Gets the position from where the item was dragged.

The index of the source.

Gets the object that a dragged item is bound to.

If the control that initated the drag is unbound or not an ItemsControl, this will be null.

Gets a collection of objects that the selected items in an ItemsControl are bound to.

If the control that initated the drag is unbound or not an ItemsControl, this will be empty.

Gets the group from a dragged item if the drag is currently from an ItemsControl with groups.

Gets the control that initiated the drag.

Gets the item in an ItemsControl that started the drag.

If the control that initiated the drag is an ItemsControl, this property will hold the item container of the clicked item. For example, if is a ListBox this will hold a ListBoxItem.

Gets the FlowDirection of the current drag source.

Gets the which is used by the drag and drop operation. Set it to a custom instance if custom drag and drop behavior is needed.

Gets the drag drop copy key state indicating the effect of the drag drop operation.

Holds information about a the target of a drag drop operation.

The class holds all of the framework's information about the current target of a drag. It is used by method to determine whether the current drop target is valid, and by to perform the drop.

Initializes a new instance of the DropInfo class.

The sender of the drag event. The drag event. Information about the source of the drag, if the drag came from within the framework.

Gets the drag data.

If the drag came from within the framework, this will hold: - The dragged data if a single item was dragged. - A typed IEnumerable if multiple items were dragged.

Gets a object holding information about the source of the drag, if the drag came from within the framework.

Gets the mouse position relative to the VisualTarget

Gets or sets the class of drop target to display.

The standard drop target adorner classes are held in the class.

Gets or sets the allowed effects for the drop.

This must be set to a value other than by a drop handler in order for a drop to be possible.

Gets the current insert position within .

Gets the current insert position within the source (unfiltered) .

This should be only used in a Drop action. This works only correct with different objects (string, int, etc won't work correct).

Gets the collection that the target ItemsControl is bound to.

If the current drop target is unbound or not an ItemsControl, this will be null.

Gets the object that the current drop target is bound to.

If the current drop target is unbound or not an ItemsControl, this will be null.

Gets the current group target.

If the drag is currently over an ItemsControl with groups, describes the group that the drag is currently over.

Gets the ScrollViewer control for the visual target.

Gets or Sets the ScrollingMode for the drop action.

Gets the control that is the current drop target.

Gets the item in an ItemsControl that is the current drop target.

If the current drop target is unbound or not an ItemsControl, this will be null.

Gets the orientation of the current drop target.

Gets and sets the text displayed in the DropDropEffects adorner.

Gets the relative position the item will be inserted to compared to the TargetItem

Gets a flag enumeration indicating the current state of the SHIFT, CTRL, and ALT keys, as well as the state of the mouse buttons.

Gets a value indicating whether the target is in the same context as the source, .

Gets or Sets the pen which can be used for the render process.

Gets the type of the default highlight target adorner.

Gets the type of the default insert target adorner.

When overridden in a derived class, participates in rendering operations that are directed by the layout system. The rendering instructions for this element are not used directly when this method is invoked, and are instead preserved for later asynchronous use by layout and drawing.

The drawing instructions for a specific element. This context is provided to the layout system.

Static class to provide access to standard application images

Gets the icon which can be used for the effect type None.

Gets the icon which can be used for the effect type Copy.

Gets the icon which can be used for the effect type Move.

Gets the icon which can be used for the effect type Link.

Loads an image based on the name and size required. Images need to be marked as 'Resource' in the project for them be loaded.

Name of the icon The size of the icon The image to be displayed

Creates a custom cursor.

Gets or sets the drag data.

This must be set by a drag handler in order for a drag to start.

Gets the position of the click that initiated the drag, relative to .

Gets the point where the cursor was relative to the item being dragged when the drag was started.

Gets or sets the allowed effects for the drag.

This must be set to a value other than by a drag handler in order for a drag to start.

Gets the mouse button that initiated the drag.

Gets the collection that the source ItemsControl is bound to.

If the control that initated the drag is unbound or not an ItemsControl, this will be null.

Gets the position from where the item was dragged.

Gets the object that a dragged item is bound to.

If the control that initated the drag is unbound or not an ItemsControl, this will be null.

Gets a collection of objects that the selected items in an ItemsControl are bound to.

If the control that initated the drag is unbound or not an ItemsControl, this will be empty.

Gets the group from a dragged item if the drag is currently from an ItemsControl with groups.

Gets the control that initiated the drag.

Gets the item in an ItemsControl that started the drag.

If the control that initiated the drag is an ItemsControl, this property will hold the item container of the clicked item. For example, if is a ListBox this will hold a ListBoxItem.

Gets the FlowDirection of the current drag source.

Gets the which is used by the drag and drop operation. Set it to a custom instance if custom drag and drop behavior is needed.

Gets the drag drop copy key state indicating the effect of the drag drop operation.

Interface implemented by Drag Handlers.

Queries whether a drag can be started.

Information about the drag. To allow a drag to be started, the property on should be set to a value other than .

Notifies the drag handler that a drop has occurred.

Information about the drop.

Notifies the drag handler that a drag has been aborted.

Notifies that an exception has occurred upon dragging.

The exception that occurrred. Boolean indicating whether the exception is handled in the drag handler. False will rethrow the exception.

Gets the drag data.

If the drag came from within the framework, this will hold: - The dragged data if a single item was dragged. - A typed IEnumerable if multiple items were dragged.

Gets a object holding information about the source of the drag, if the drag came from within the framework.

Gets the mouse position relative to the VisualTarget

Gets or sets the class of drop target to display.

The standard drop target adorner classes are held in the class.

Gets or sets the allowed effects for the drop.

This must be set to a value other than by a drop handler in order for a drop to be possible.

Gets the current insert position within .

Gets the current insert position within the source (unfiltered) .

This should be only used in a Drop action. This works only correct with different objects (string, int, etc won't work correct).

Gets the collection that the target ItemsControl is bound to.

If the current drop target is unbound or not an ItemsControl, this will be null.

Gets the object that the current drop target is bound to.

If the current drop target is unbound or not an ItemsControl, this will be null.

Gets the current group target.

If the drag is currently over an ItemsControl with groups, describes the group that the drag is currently over.

Gets the control that is the current drop target.

Gets the item in an ItemsControl that is the current drop target.

If the current drop target is unbound or not an ItemsControl, this will be null.

Gets the orientation of the current drop target.

Gets the FlowDirection of the current drop target.

Gets and sets the text displayed in the DropDropEffects adorner.

Gets the relative position the item will be inserted to compared to the TargetItem

Gets a flag enumeration indicating the current state of the SHIFT, CTRL, and ALT keys, as well as the state of the mouse buttons.

Indicates if the drop info should be handled by itself (useful for child elements)

Gets a value indicating whether the target is in the same context as the source, .

Interface implemented by Drop Handlers.

Updates the current drag state.

Information about the drag. To allow a drop at the current drag position, the property on should be set to a value other than and should be set to a non-null value.

Performs a drop.

Information about the drop.

Specifies how reacts to drop operation.

A helper class for Dpi logicm cause Microsoft hides this with the internal flag.

Convert a point in device independent pixels (1/96") to a point in the system coordinates.

A point in the logical coordinate system. Returns the point converted to the system's coordinates.

Convert a point in system coordinates to a point in device independent pixels (1/96").

A point in the physical coordinate system. Returns the point converted to the device independent coordinate system.

Determines whether the given element is ignored on drag start ().

The given element. Element is ignored or not.

Determines whether the given element is ignored on drop action ().

The given element. Element is ignored or not.

Determines whether the given element is ignored on drop action ().

The given element. Element is ignored or not.

thx to @osicka from issue #84 e.g. original source is part of a popup (e.g. ComboBox drop down), the hit test needs to be done on the original source. Because the popup is not attached to the visual tree of the sender. This function test this by looping back from the original source to the sender and if it didn't end up at the sender stopped the drag.

Gets the Orientation which will be used for the drag drop action. Normally it will be look up to find the correct orientaion of the inner ItemsPanel, but sometimes it's necessary to force the oreintation, if the look up is wrong. If so, the ItemsPanelOrientation value is taken.

The ItemsControl for the look up. Orientation for the given ItemsControl.

Gets the FlowDirection which will be used for the drag drop action.

The ItemsControl for the look up. FlowDirection for the given ItemsControl.

Sets the given object as selected item at the ItemsControl.

The ItemsControl which contains the item. The object which should be selected.

Extension methods for TreeViewItem

Try get the height of the header part for the given TreeViewItem. If there is no PART_Header it will return Size.Empty.

The TreeViewItem.

Try get the header part of the given TreeViewItem. If there is no PART_Header it will return null.

The TreeViewItem.

Gets the enumerable as list. If enumerable is an ICollectionView then it returns the SourceCollection as list.

The enumerable. Returns a list.

Gets the next ancestor element which is a drop target.

The start element. The first element which is a drop target.

find the visual ancestor item by type

find the visual ancestor by type and go through the visual tree until the given itemsControl will be found