java - JPanel taking up more space than it needs. How can I shrink it? -
update: have received justified criticism posting non working code. i've taken heart , updating post complete working example. i'm updating description accordingly:
i have simple java swing gui components take looks equal amount of vertical (y) space used largest y extent component, unnecessarily so. have tried shrink components don't need vertical space using preferredsize hints no avail.
the basic layout simple: there's main window , 3 vertical panels. layout simple gridlayout (and prefer keep way, unless shows me need cannot done gridlayout). 3 panels seem occupying same amount of vertical space, though in case of sliders, massive waste of space. how can each of sub-panes use space each need? i.e. 2 slider windows tall sliders , description need be.
the code:
import java.awt.*; import java.awt.event.*; import javax.swing.*; class test { public static void main(string[] arg) { jframe mainwindow = new jframe(); jslider slider1 = new jslider(0,100,50); jslider slider2 = new jslider(0,100,50); jpanel pnlslider1 = new jpanel(); pnlslider1.setlayout(new gridlayout(1,1)); // 1 row, 1 column pnlslider1.add(new jlabel("description slider1")); pnlslider1.add(slider1); jpanel pnlslider2 = new jpanel(); pnlslider2.setlayout(new gridlayout(1,1)); // 1 row, 1 column pnlslider2.add(new jlabel("description slider2")); pnlslider2.add(slider2); // label should left of slider string content = "<html>some rather long winded html content</html>"; jeditorpane ep = new jeditorpane("text/html", content); // main window panel jpanel panel = new jpanel(); panel.setlayout(new gridlayout(3,1)); // 3 rows, 1 column panel.add(ep); panel.add(pnlslider1); panel.add(pnlslider2); // tie , display window mainwindow.setpreferredsize(new dimension(300, 600)); mainwindow.setlocation(100, 100); mainwindow.getcontentpane().add(panel); mainwindow.pack(); mainwindow.addwindowlistener(new windowadapter() { public void windowclosing(windowevent e) { system.exit(0); } }); mainwindow.setvisible(true); } } (removed rant not having seen gui coding advances in 30 years that's not pertinent problem , won't solved in post either)
..components take looks equal amount of vertical (y) space used largest y extent component, unnecessarily so.
yes, is way gridlayout designed work.
use gridbaglayout or boxlayout or grouplayout instead, each of can single column or row of components of variable size (width , height).
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