How to use scale method in Graphics2D for zoom in/out in JPanel.

Question

Hi All,
Iam working on zoom functionality, I have JPanel as my Drawing view while creating iam setting scale as 1.0D... if you click on zoom in or zoom out button iam again setting the scale of graphics2D object like below.
if(!(g instanceof Graphics2D)) {
super.paint(g);
return;
else {
     Graphics2D g2 = (Graphics2D)g;
     g2.scale(m_dMagnitude, m_dMagnitude);
     super.paint(g2);
As i added my JPanel on JTabbedPane and when i try to zoom out the view you can see the color difference as both have different back ground color. And when iam trying to add any graphics object it's not adding where you click mouse.
Can any buddy let me know is there any way to do this, if any one have code pls pass to me.

Answer 1

The only way to access a protected variable is to subclass.
MyCalendar extends Calendar
but I doubt you need to do this. If you only want to tell if a Calendar object has a time associated with it, try using
cal.isSet( Calendar.HOUR );