* Constructor. Sets PObject to Mode.
* @param applet The <em>controller</em> object.
*/
public ModeButton( CalculatorApplet applet ){
this.applet = applet;
this.pobject = new Mode();
setText();
setTextSize();
tooltip = "changes mode: press once to select normal/statistics<br>" +
"mode; press twice to select degrees/radians; press<br>" +
"again to leave mode selection";