Graphical Panel Controls: Radio Button

Radio buttons allow the user of a graphical panel to select from among a small list of available options, much like the buttons on old car stereos. These controls are usually used in groups by linking multiple radio buttons to the same signal. When one radio button tied to a particular signal is clicked, the value associated with that button is assigned to the signal. At the same time, any other radio buttons linked to that signal are de-selected, so that only one can ever be selected at a time. An example of a cluster of three radio buttons can be seen in Figure 1.

Multiple groups of radio buttons can be used to enable easy selection of options for multiple signals.

Figure 1: A set of three radio buttons linked to a signal. Selecting any option de-selects the others.

A list of common properties can be found under Common Control Properties. Table 1 describes the single additional property for the Radio Button control.

Table 1: Radio Button Control Properties

Property	Function and Options
Value	Sets the value returned to the linked signal when the button is selected.