ZoomListener

class ZoomListener extends FractalListener implements MouseInputListener{
    private double startX, startY, finalX, finalY;
    private Rectangle selection;
    private Point anchor;

    @Override
    public void mousePressed(MouseEvent e){
        updateDetails();
        startX = e.getX();
        startY= e.getY();
        anchor = e.getPoint();
        selection = new Rectangle(anchor);
        drawingPanel.setIsZooming(true);
        drawingPanel.setZoomRect(selection);
    }

    @Override
    public void mouseReleased(MouseEvent e){
        finalX = e.getX();
        finalY = e.getY();
        double xScale = (xMaxVal - xMinVal) / size.getWidth();
        double yScale = (yMaxVal - yMinVal) / size.getHeight();
        startX = xMinVal + (startX * xScale);
        finalX = xMinVal + (finalX * xScale);
        startY = yMaxVal - (startY * yScale);
        finalY = yMaxVal - (finalY * yScale);
        if(startX != finalX && startY != finalY){
imageDetails[0] = Math.min(startX, finalX);
imageDetails[1] = Math.max(startX, finalX);
imageDetails[2] = Math.min(startY, finalY);
imageDetails[3] = Math.max(startY, finalY);
String text = new String();
text += imageDetails[0];
realMin.setText(text);
text = "";
text += imageDetails[1];
realMax.setText(text);
text = "";
text += imageDetails[2];
imgMin.setText(text);
text = "";
text += imageDetails[3];
imgMax.setText(text);
drawingPanel.setIsZooming(false);
selection = null;
drawingPanel.setZoomRect(selection);
repaint();
        }
    }

    @Override
    public void mouseDragged(MouseEvent e){
        selection.setBounds( (int)Math.min(anchor.x,e.getX()), (int)Math.min(anchor.y,e.getY()),
                (int)Math.abs(e.getX()-anchor.x), (int)Math.abs(e.getY()-anchor.y));
        drawingPanel.repaint();
    }
}