help with transparent panel

[mindfac]

good morning!

there is a problem i´ve got...
i´m writing on an application, that uses an jpg image as a background picture (attached to the frame). on top of that background there are other panels, that include some buttons and labels.
does anybody know how i can make the panel´s background transparent? i have to use panels in order to keep a formation of the buttons and labels.
(btw i´m not used to Java3D classes).

i would appreciate it, if anybody could help me out...

mindfac

 

[tkt]

I'm working on a similar problem. I want to make a Java window's background transparent - I haven't found the solution yet but I found some information on the glass class that might help you. Here is a link to the information I found. Hope it helps.

http://java.sun.com/docs/books/tutorial/uiswing/components/rootpane.html

tkt

 

[idarke]

I found this reference on the Sun tutorial site:

"By default, panels are opaque. This makes them work well as content panes, and can help painting efficiency, as described in Painting. You can make a panel transparent by invoking setOpaque(false). A transparent panel draws no background, so that any components underneath show through. "

The full tutorial page is here:

http://java.sun.com/docs/books/tutorial/uiswing/components/panel.html

I've never done it, so I'm interested to learn if it works. "When you have eliminated the impossible, whatever remains, however
improbable, must be the truth." ~ Arthur Conan Doyle

 

[Targol]

The problem with panels is that when U set panel opacity to false, U don't set contained panels opacity. So I made a recursive static method that I stored into a Toolkit class that does it. Here it is for U guys :

public static void setPanelOpacity(JPanel aPanel, boolean aOpaque) {
	aPanel.setOpaque(aOpaque);
	Component[] listComp = aPanel.getComponents();
	for (int i = 0; i< listComp.length; i++) {
		if (listComp[i] instanceof JPanel) {
			setPanelOpacity((JPanel)listComp[i], aOpaque);
		} else if (listComp[i] instanceof JComponent) {
			((JComponent)listComp[i]).setOpaque(aOpaque);
		}
	}
}

Water is not bad as long as it stays out human body ;-)