# Design-time Interaction

Understand the different concepts of design-time interaction for the C1Gauge control. See more demos, documentation, and samples here.

## Content



**C1Gauge** paints the topmost hit-testable element under the mouse pointer using the special brush. You can specify the color, opacity, and the hatch style of this brush using the **C1Gauge.HotBrush** property. The special tooltip appears under the **C1Gauge** control. It shows the type, name, and “path” to the “hot” element.

If you click the highlighted element its owner gauge (**C1RadialGauge**, **C1LinearGauge**, or the container control – **C1Gauge**) becomes selected on the designer surface. You can double click the “hot” gauge element to display a popup window with properties of the given element. As alternative way, you may right-click the “hot” element, then select “Launch Item Editor” from its context menu. Again, this only works for gauge items which have the **HitTestable** property set to True. Other elements behave as “transparent”.

Clicking at the point where there is no any hit-testable element selects the gauge component (**C1RadialGauge** or **C1LinearGauge**) or the container control (**C1Gauge**). A double click in **C1Gauge** or **C1GaugeBase** opens its editor in a popup window.

## See Also

[Run-time Interaction](/componentone/docs/win/online-gauges/workingwithgaugesfor/userinteraction/runtimeinteraction)