Vertical alignment of icons with various size in J

问题:

I met problem to align icons of different sizes with JRadioButtonMenuItem. Here's a picture of my problem. The icons have several sizes and are left aligned.

I would like to center the icons as in the picture below.

Apparently, none of the methods of JRadioButtonMenuItem class allow to do that...

回答1:

As an alternative, implement the Icon interface using a constant enclosing size and scale the rendered content to reflect the desired image size, as shown in this example. For convenience, you can render arbitrary sized unicode glyphs, as shown here.

image http://i43.tinypic.com/9h82hi.png

回答2:

Calculate how much white space to add before and after an icon with the width of the widest icon and place each icon with the method setIconTextGap() such that:

[(widestIconWidth-iconWidth)/2_ofWhiteSpace][icon][(widestIconWidth-iconWidth)/2_ofWhiteSpace]