java - ScrolledComposite wont display in TabFolder -


i having difficult time trying find example scrollbars work expected inside tabfolder. below sample code. can show me doing wrong, or if bug?

import org.eclipse.swt.swt; import org.eclipse.swt.custom.scrolledcomposite; import org.eclipse.swt.layout.griddata; import org.eclipse.swt.layout.gridlayout; import org.eclipse.swt.widgets.composite; import org.eclipse.swt.widgets.display; import org.eclipse.swt.widgets.shell; import org.eclipse.swt.widgets.tabfolder; import org.eclipse.swt.widgets.tabitem; import org.eclipse.swt.widgets.text;  public class test {     public static void main(string[] args) {         display display = new display();          shell shell = new shell(display, swt.shell_trim);         shell.setlayout(new gridlayout(1, false));          tabfolder tabfolder = new tabfolder(shell, swt.null);          tabitem tab = new tabitem(tabfolder, swt.null);          scrolledcomposite scrolledcomposite = new scrolledcomposite(tabfolder,            swt.h_scroll | swt.v_scroll);         scrolledcomposite.setexpandhorizontal(true);         scrolledcomposite.setexpandvertical(true);         scrolledcomposite.setlayout(new gridlayout(1, false));         scrolledcomposite.setlayoutdata(new griddata(swt.fill, swt.fill,           true, true));          composite innercomposite = new composite(scrolledcomposite, swt.null);         (int x = 0; x < 20; x++) {             text t = new text(innercomposite, swt.border);             t.settext(x + "");         }         innercomposite.setlayout(new gridlayout(2, false));         innercomposite.setlayoutdata(new griddata(swt.fill, swt.fill, true,            true));          scrolledcomposite.setcontent(innercomposite);         scrolledcomposite.setminsize(scrolledcomposite.computesize(swt.default,           swt.default));         tab.setcontrol(scrolledcomposite);          shell.setsize(100, 100);         shell.open();         while (!shell.isdisposed()) {             if (!shell.getdisplay().readanddispatch()) {                 shell.getdisplay().sleep();             }         }         display.dispose();     } }

there number of issues in this. see comments in code:

tabfolder tabfolder = new tabfolder(shell, swt.null);  // must set layout data shell gridlayout tabfolder.setlayoutdata(new griddata(swt.fill, swt.fill, true, true));  tabitem tab = new tabitem(tabfolder, swt.null);  scrolledcomposite scrolledcomposite = new scrolledcomposite(tabfolder, swt.h_scroll | swt.v_scroll); scrolledcomposite.setexpandhorizontal(true); scrolledcomposite.setexpandvertical(true);  // scrolledcomposite ignores setlayout // scrolledcomposite.setlayout(new gridlayout(1, false)); // tabfolder doesn't use griddata // scrolledcomposite.setlayoutdata(new griddata(swt.fill, swt.fill, true, true));  composite innercomposite = new composite(scrolledcomposite, swt.null); (int x = 0; x < 20; x++) {     final text t = new text(innercomposite, swt.border);     t.settext(x + ""); } innercomposite.setlayout(new gridlayout(2, false)); innercomposite.setlayoutdata(new griddata(swt.fill, swt.fill, true, true));  scrolledcomposite.setcontent(innercomposite);  // minsize should computed size of inner composite scrolledcomposite.setminsize(innercomposite.computesize(swt.default, swt.default));   tab.setcontrol(scrolledcomposite);

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