TabbedPane: tab area alignment; min/max tab widths; tab icon placement; tab width mode

[DevCharly]

Tab area alignment

By default the tab area is aligned to the left edge.
Now you can also align it to the right, center or fill.

To use this for the whole application (allowed values are leading, trailing, center and fill:

UIManager.put( "TabbedPane.tabAreaAlignment", "center" );

To use this for single tabbed pane:

myTabbedPane.putClientProperty( "JTabbedPane.tabAreaAlignment", "center" );

Minimum/maximum tab width

With this PR you can now specify minimum and maximum tab widths.
This is useful for IDE like applications where you e.g. use file names in tab titles.
With minimum tab width you can avoid small tabs for short file names.
With maximum tab width you can avoid too wide tabs for long file names.

Minimum tab width makes tabs wider:

Maximum tab width makes tabs smaller:

myTabbedPane.putClientProperty( "JTabbedPane.minimumTabWidth", 100 );
myTabbedPane.putClientProperty( "JTabbedPane.maximumTabWidth", 200 );

Tab icon placement

You can now specify the tab icon placement (relative to tab title),
which makes it easy to create tabs in a style that you know from
your smartphone or tablet.

myTabbedPane.putClientProperty( "JTabbedPane.tabIconPlacement", SwingConstants.TOP );
myTabbedPane.putClientProperty( "JTabbedPane.tabIconPlacement", SwingConstants.BOTTOM );
myTabbedPane.putClientProperty( "JTabbedPane.tabIconPlacement", SwingConstants.LEADING ); // default
myTabbedPane.putClientProperty( "JTabbedPane.tabIconPlacement", SwingConstants.TRAILING );

Tab width mode

With the "width mode" you can make all tabs equal width or hide tab title of unselected tabs. Available modes:

• preferred: tab width is adjusted to tab icon and title (the default)
• equal: all tabs in a tabbed pane has same width
• compact: unselected tabs show only the tab icon, but no tab title; selected tabs show both; works only if tab has icon

myTabbedPane.putClientProperty( "JTabbedPane.tabWidthMode", "preferred" ); // default
myTabbedPane.putClientProperty( "JTabbedPane.tabWidthMode", "equal" );
myTabbedPane.putClientProperty( "JTabbedPane.tabWidthMode", "compact" );