DragZoomingTool

Box

protected Node Box { get; set; }

value = dragZoomingTool.Box
dragZoomingTool.Box = value

Gets or sets the temporary node acting as the "rubber-band" box that the user is stretching with a mouse drag.

BoxTemplate

public DataTemplate BoxTemplate { get; set; }

value = dragZoomingTool.BoxTemplate
dragZoomingTool.BoxTemplate = value

Gets or sets the DataTemplate that renders the "rubber-band" box that the user draws to specify the zoom area.

ZoomedDiagram

public Diagram ZoomedDiagram { get; set; }

value = dragZoomingTool.ZoomedDiagram
dragZoomingTool.ZoomedDiagram = value

Gets or sets the Diagram that will be scaled and scrolled according to the value of ComputeBoxBounds by Rect).

CanStart

public override bool CanStart()

result = dragZoomingTool.CanStart()

This tool can run when there has been a mouse-drag, far enough away not to be a click.

ComputeBoxBounds

protected virtual Rect ComputeBoxBounds()

result = dragZoomingTool.ComputeBoxBounds()

This just returns a Rect stretching from the mouse-down point to a point guided by the current mouse point and the aspect ratio of the ZoomedDiagram.

CreateBox

protected virtual Node CreateBox()

result = dragZoomingTool.CreateBox()

Create a Node using BoxTemplate as its DataTemplate.

Returns: a Node that is not bound to data

DoActivate

public override void DoActivate()

dragZoomingTool.DoActivate()

Call CreateBox to create the "rubber-band" box, remember it as the Box property, and add it to the diagram's PartsModel.

DoDeactivate

public override void DoDeactivate()

dragZoomingTool.DoDeactivate()

Cleanup any Box.

DoMouseMove

public override void DoMouseMove()

dragZoomingTool.DoMouseMove()

While dragging the mouse, position and size the Box according to the bounds produced by ComputeBoxBounds.

DoMouseUp

public override void DoMouseUp()

dragZoomingTool.DoMouseUp()

Upon the mouse-up, call Rect) with the value of ComputeBoxBounds and stop this tool.

DoStart

public override void DoStart()

dragZoomingTool.DoStart()

Capture the mouse when starting this tool.

DoStop

public override void DoStop()

dragZoomingTool.DoStop()

Release the mouse capture when stopping this tool.

ZoomToRect

public virtual void ZoomToRect(Rect brect)

dragZoomingTool.ZoomToRect(brect)

This method is called to zoom the ZoomedDiagram to match the given rectangle.

brect

a rectangle in model coordinates

BoxTemplateProperty

public static readonly DependencyProperty BoxTemplateProperty

value = DragZoomingTool.BoxTemplateProperty

Identifies the BoxTemplate dependency property.

ZoomedDiagramProperty

public static readonly DependencyProperty ZoomedDiagramProperty

value = DragZoomingTool.ZoomedDiagramProperty

Identifies the ZoomedDiagram dependency property.