The Distance Circle Circle edit control provides a graphical user interface to the DistanceCircleCircle method, which returns the shortest distance between CircleA to CircleB. The edit control allows you to configure the two circles, dictate which graphics appear as the tool executes, and view tool results. The following figure shows the Distance Circle Circle edit control:

The edit control offers the following features:

• A row of control buttons at the top left
• A set of function tabs to define the two circles, choose what graphics the tool will use, and view results
• An image display window for displaying tool images and graphics

You can experiment with the edit control by using QuickBuild to create a CogDistanceCircleCircleTool tool. A new CogDistanceCircleCircleTool tool appears as shown in the following figure:

The two circles can either be specified directly from within the edit control or accepted as the result of other circle-generating vision tools. For example, the following figure shows how a Distance Circle Circle tool accepts circles generated as output from two Create Circle tools:

To include the edit control in your custom vision application, you must first add it to your Visual Studio.NET development environment. See Using Edit Controls in Your Custom Vision Applications for more information.

The following table describes the function of each button:

Table 1. Control buttons

Button	Description	Function
	Run	Measures the distance between the two circles
	Electric mode	Toggles electric mode, where the Distance Circle Circle tool executes automatically when particular configuration parameters change. In electric mode, a lightning bolt appears next to every electric property
	Local image display	Opens or closes the local image display window. A Distance Circle Circle tool supports the following image buffers: The Current.InputImage buffer contains the current image and the two input circles The LastRun.InputImage buffer contains the results of the tool after it measures the distance between the two circles
	Floating image display	Opens one or more floating image windows, which support the same image buffers as the local image display window
	Open	Opens a VisionPro persistence (.vpp) file that contains a set of saved properties for this vision tool object type. VisionPro reports an error if you try to open a .vpp file for another object type.
	Save	Saves the current properties of the vision tool to a VisionPro persistence (.vpp) file. The edit control allows you to choose between saving the vision tool with or without its image buffers and tool results.
	Save As	Saves the current properties of the vision tool to a new VisionPro persistence (.vpp) file
	Reset	Resets the vision tool to its default state.
	Show ToolTips	Enables or disables the display of tooltips for individual items in the edit control
	Help	Opens this VisionPro online help file

Use the Settings tab to define CircleA and CircleB, or use the tab to confirm that the existing circles correspond to the correct input circles generated by another tool. The following figure shows the Settings tab:

The Settings tab offers identical controls for configuring both circles:

Use the Graphics tab to control which graphics the Distance Circle Circle tool generates and displays. The following figure shows the Graphics tab:

The Graphics tab offers the following features:

Use the Results tab to view the relationship between CircleA and CircleB as determined by the Distance Circle Circle tool. The following figure shows the Results tab:

The Results tab offers the following features: