/** @file
* Copyright (C) 2004–5 John D Lamb (J.D.Lamb@btinternet.com)
* Copyright (C) 20007 John D Lamb (J.D.Lamb@btinternet.com)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
package jscicalc.button;
import jscicalc.CalculatorApplet;
import jscicalc.pobject.*;
import jscicalc.complex.Complex;
import jscicalc.OObject;
/**
* This button creates a Container with the value currently stored in the
* calculator memory and puts it in memory. Probably could be derived from
* EqualsButton.
*
* @author J. D. Lamb
* @version $Revision: 1.6 $
*/
public class STOButton extends CalculatorButton {
/**
* Constructor. Sets PObject to STO.
* @param applet The <em>controller</em> object.
*/
public STOButton( CalculatorApplet applet ){
this.applet = applet;
this.pobject = new STO();
setText();
setTextSize();
tooltip = "evaluates current expression and stores in memory";
shortcut = 'S';
setToolTipText();
addActionListener( this );
}
/**
* Evaluates current expression and stores in memory. If no expression (i.e.
* expression was evaluated on last button press, takes value from
* CalculatorApplet instead. In either case, asks CalculatorApplet to store
* in memory, possibly changing state of ExtraPanel to show a nonzero
* memory value.
* @param actionEvent The event that generated this method call: usually a button
* press or called when CalculatorApplet responded to the key associated with
* this button
*/
public void actionPerformed( java.awt.event.ActionEvent actionEvent ){
synchronized( applet ){
if( !(getApplet().getValue() instanceof Complex) ){
getApplet().requestFocusInWindow();
return;
}
getApplet().pushHistory();
Complex value = (Complex)(getApplet().getValue());
if( getApplet().getMode() != 0 ){
getApplet().setMode( pobject );
getApplet().requestFocusInWindow();
return;
}
OObject o = getApplet().getValue();
if( !getApplet().getParser().isEmpty() ){
PObject p = getApplet().getParser().getLast();
if( !(o instanceof jscicalc.Error) && ( p instanceof RFunction ||
p instanceof DFunction ||
p instanceof MFunction ||
p instanceof AFunction ) ){
Ans ans = new Ans();
ans.setValue( o );
getApplet().insert( ans );
getApplet().updateDisplay( true, true );
}
o = getApplet().getParser().evaluate( getApplet().getAngleType() );
} else {
o = value;
}
getApplet().setValue( o );
if( !(o instanceof jscicalc.Error) )
getApplet().setMemory( o );
getApplet().updateDisplay( false, true );
if( getApplet().getShift() )
getApplet().setShift( false );
getApplet().newExpression();
getApplet().requestFocusInWindow();
}
}
private static final long serialVersionUID = 1L;
}